METHODS AND APPARATUS FOR INTERFERENCE MANAGEMENT OF WIRELESS LINKS WITH OVERRIDING LINK PRIORITY
Aspects of the present disclosure relate to methods and apparatus for interference management of wireless links with overriding link priority. The switched wireless link or connection may have lower or higher priority than the non-switched or scheduled link. The priority order between the links may be overridden in certain conditions.
This application is a continuation of U.S. non-provisional patent application Ser. No. 15/724,119, filed on Oct. 3, 2017, which is a continuation of U.S. non-provisional patent application Ser. No. 15/048,829, filed on Feb. 19, 2016 that claims priority to and the benefit of U.S. provisional patent application No. 62/209,156, filed on Aug. 24, 2015 with the United States Patent and Trademark Office, and the contents of each prior application are incorporated herein by reference.
TECHNICAL FIELDThe technology discussed below relates generally to wireless communication systems, and more particularly, interference management of wireless links with overriding link priority.
BACKGROUNDWireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power). Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency divisional multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems.
In various wireless communication systems, multiple wireless links, connections, or carriers may be utilized for uplink and/or downlink communications. Uplink communication generally refers to signal transmission from a user equipment to a base station. Downlink communication generally refers to signal transmission from a base station to a user equipment. When the frequencies of two wireless links are the same or close to each other, transmissions on one wireless link may cause undesirable interference to the other wireless link. Hence, interference management is an important aspect in wireless communication systems. In some wireless communication systems, the wireless links may be associated with a priority order. Therefore, when there are several interfering wireless links, low priority wireless link(s) may yield to the high priority link(s) based on their relative priority. In general, a low priority link yields to a high priority link if the low priority link may cause significant or undesirable interference to the high priority link.
BRIEF SUMMARY OF SOME SAMPLE EMBODIMENTSThe following summarizes some aspects of the present disclosure to provide a basic understanding of the discussed technology. This summary is not an extensive overview of all contemplated features of the disclosure, and is intended neither to identify key or critical elements of all aspects of the disclosure nor to delineate the scope of any or all aspects of the disclosure. Its sole purpose is to present some concepts of one or more aspects of the disclosure in summary form as a prelude to the more detailed description that is presented later.
Aspects of the present disclosure relate to methods and apparatus for interference management of wireless links with overriding link priority. The switched or reconfigured wireless link or connection may have lower or higher priority than the non-switched or scheduled link. In some aspects of the disclosure, the priority order between the links may be overridden in certain conditions per subframe or transmission time interval.
One aspect of the present disclosure provides a method of managing interference in a wireless network that includes a first cell and a second cell. In the first cell, a first apparatus communicates with a second apparatus using a first connection configured with a payload data direction that is synchronized with a payload data direction of a second connection between a third apparatus and a fourth apparatus in the second cell. The first apparatus reconfigures the first connection such that the payload data direction of the first connection is not synchronized with the payload data direction of the second connection. The first apparatus transmits a priority override signal to the third apparatus to modify a link priority of the reconfigured first connection to be higher than that of the second connection, such that a transmission of the reconfigured first connection has priority over the second connection during an interference between the second connection and the reconfigured first connection.
Another aspect of the present disclosure provides a first apparatus for wireless communication. The first apparatus includes a communication interface configured for wireless communication in a wireless network comprising a first cell and a second cell. The first apparatus further includes a memory and a processor operatively coupled with the communication interface and the memory.
The first apparatus is configured to communicate, in the first cell, with a second apparatus using a first connection configured with a payload data direction that is synchronized with a payload data direction of a second connection, in the second cell, between a third apparatus and a fourth apparatus. The first apparatus is further configured to reconfigure the first connection such that the payload data direction of the first connection is not synchronized with the payload data direction of the second connection. The first apparatus is further configured to transmit a priority override signal to the third apparatus to modify a link priority of the reconfigured first connection to be higher than that of the second connection, such that a transmission of the reconfigured first connection has priority over the second connection during an interference between the second connection and the reconfigured first connection.
Another aspect of the present disclosure provides a first apparatus in a wireless network comprising a first cell and a second cell. The first apparatus comprises means for communicating in the first cell with a second apparatus using a first connection configured with a payload data direction that is synchronized with a payload data direction of a second connection, in the second cell, between a third apparatus and a fourth apparatus. The first apparatus further comprises means for reconfiguring the first connection such that the payload data direction of the first connection is not synchronized with the payload data direction of the second connection. The first apparatus further comprises means for transmitting a priority override signal to the third apparatus to modify a link priority of the reconfigured first connection to be higher than that of the second connection, such that a transmission of the reconfigured first connection has priority over the second connection during an interference between the second connection and the reconfigured first connection.
Another aspect of the present disclosure provides a non-transitory computer-readable medium storing computer-executable code. The code causes a first apparatus in a wireless network to communicate, in a first cell, with a second apparatus using a first connection configured with a payload data direction that is synchronized with a payload data direction of a second connection, in a second cell, between a third apparatus and a fourth apparatus. The code further causes the first apparatus to reconfigure the first connection such that the payload data direction of the first connection is not synchronized with the payload data direction of the second connection. The code further causes the first apparatus to transmit a priority override signal to the third apparatus to modify a link priority of the reconfigured first connection to be higher than that of the second connection, such that a transmission of the reconfigured first connection has priority over the second connection during an interference between the second connection and the reconfigured first connection.
These and other aspects of the invention will become more fully understood upon a review of the detailed description, which follows. Other aspects, features, and embodiments of the present invention will become apparent to those of ordinary skill in the art, upon reviewing the following description of specific, exemplary embodiments of the present invention in conjunction with the accompanying figures. While features of the present invention may be discussed relative to certain embodiments and figures below, all embodiments of the present invention can include one or more of the advantageous features discussed herein. In other words, while one or more embodiments may be discussed as having certain advantageous features, one or more of such features may also be used in accordance with the various embodiments of the invention discussed herein. In similar fashion, while exemplary embodiments may be discussed below as device, system, or method embodiments it should be understood that such exemplary embodiments can be implemented in various devices, systems, and methods.
The detailed description set forth below in connection with the appended drawings is intended as a description of various configurations and is not intended to represent the only configurations in which the concepts described herein may be practiced. The detailed description includes specific details for the purpose of providing a thorough understanding of various concepts. However, it will be apparent to those skilled in the art that these concepts may be practiced without these specific details. In some instances, well-known structures and components are shown in block diagram form in order to avoid obscuring such concepts.
Several aspects of telecommunication systems will now be presented with reference to various apparatuses and methods. These apparatuses and methods will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as “elements”). These elements may be implemented using electronic hardware, computer software, firmware, or any combination thereof. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.
In this example, the processing system 114 may be implemented with a bus architecture, represented generally by the bus 102. The bus 102 may include any number of interconnecting buses and bridges depending on the specific application of the processing system 114 and the overall design constraints. The bus 102 links together various circuits including one or more processors (represented generally by the processor 104), a memory 105, and computer-readable media (represented generally by the computer-readable medium 106). The bus 102 may also link various other circuits such as timing sources, peripherals, voltage regulators, and power management circuits, which are well-known in the art, and therefore, will not be described any further. A bus interface 108 provides an interface between the bus 102 and a transceiver 110. The transceiver 110 provides a means for communicating with various other apparatus over a transmission medium. For example, the transceiver 110 may include one or more receivers (RX) and transmitters (TX) for communicating with other wireless devices. Depending upon the nature of the apparatus, a user interface 112 (e.g., keypad, display, speaker, microphone, joystick, touchscreen, touchpad) may also be provided.
By way of example, an element, or any portion of an element, or any combination of elements may be implemented with a “processing system” that includes one or more processors. Examples of processors include microprocessors, microcontrollers, digital signal processors (DSPs), field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform the various functionality described throughout this disclosure. One or more processors in the processing system may execute software. Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, computer executable code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., whether referred to as software, code, firmware, middleware, microcode, hardware description language, or otherwise. The software may reside on a computer-readable medium. The computer-readable medium may be a non-transitory computer-readable medium. A non-transitory computer-readable medium includes, by way of example, a magnetic storage device (e.g., hard disk, floppy disk, magnetic strip), an optical disk (e.g., compact disk (CD), digital versatile disk (DVD), Blu-ray disk (BRD)), a smart card, a flash memory device (e.g., card, stick, key drive), random access memory (RAM), read only memory (ROM), programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), a register, a removable disk, and any other suitable medium for storing software and/or instructions that may be accessed and read by a computer. The computer-readable medium may be resident in the processing system, external to the processing system, or distributed across multiple entities including the processing system. The computer-readable medium may be embodied in a computer-program product. By way of example, a computer-program product may include a computer-readable medium in packaging materials. Those skilled in the art will recognize how best to implement the described functionality presented throughout this disclosure depending on the particular application and the overall design constraints imposed on the overall system.
In some aspects of the disclosure, the processor 104 may include an interference management block 120, a downlink/uplink (DL/UL) switching block 122, a priority overriding block 124, and other circuitry, which may be configured to perform the various functions and processes described in relation to
The DL/UL switching block 122 may be configured to perform processes for switching a scheduled downlink (DL) connection to a switched uplink (UL) connection, or a scheduled UL connection to a switched DL connection, in a subframe or time slot. The priority overriding block 124 may be configured to perform processes for overriding a priority of a DL or UL connection relative to another DL/UL connection. A scheduled DL connection denotes a connection or communication link between a base station and a UE initially setup to be DL during a certain time period (e.g., transmission time interval (TTI), time slot, or subframe). A scheduled UL connection denotes a connection or communication link between a base station and a UE initially setup to be UL during a certain time period (e.g., TTI, time slot, subframe). A switched UL connection denotes a scheduled DL connection in a certain time period that is repurposed or switched to an UL connection (switched UL) during at least a portion of the same time period. A switched DL connection denotes a scheduled UL connection in a certain time period that is repurposed or switched to a DL connection (switched DL) during at least a portion of the same time period.
The processor 104 is also responsible for managing the bus 102 and general processing, including the execution of software stored on the computer-readable medium 106. The software, when executed by the processor 104, causes the processing system 114 to perform the various functions described below for any particular apparatus. The computer-readable medium 106 may also be used for storing data that is manipulated by the processor 104 when executing software. For example, the data may include interference thresholds and algorithms for determining the interference between communication links.
The modulation and multiple access scheme employed by the access network 200 may vary depending on the particular telecommunications standard being deployed. In some aspects of the disclosure, frequency division duplexing (FDD) and/or time division duplexing (TDD) may be used for the uplink (UL) and downlink (DL) connections. In a specific example, the base stations and UEs may communicate using TDD UL and DL connections. Some of the neighbor base stations may communicate with their corresponding UEs in the same traffic direction (DL or UL) (i.e., synchronized in traffic direction in the same subframe). Under certain conditions, a DL/UL connection may be switched to an UL/DL connection in a certain time period, subframe or time slot.
As those skilled in the art will readily appreciate from the detailed description to follow, the various concepts presented herein may be readily extended to other telecommunication standards employing various modulation and multiple access techniques. By way of example, these concepts may be extended to Evolution-Data Optimized (EV-DO) or CDMA2000. EV-DO and CDMA2000 are air interface standards promulgated by the 3rd Generation Partnership Project 2 (3GPP2) as part of the CDMA2000 family of standards, and employ CDMA to provide broadband Internet access to mobile stations. These concepts may also be extended to Universal Terrestrial Radio Access (UTRA) employing Wideband-CDMA (W-CDMA) and other variants of CDMA, such as TD-SCDMA: Global System for Mobile Communications (GSM) employing TDMA; and Evolved UTRA (E-UTRA), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, and Flash-OFDM employing OFDMA. UTRA, E-UTRA, UMTS, LTE and GSM are described in documents from the 3GPP organization. In some examples, the described link interference management techniques may be extended to fifth generation (5G) networks. The actual wireless communication standard and the multiple access technology employed will depend on the specific application and the overall design constraints imposed on the system.
In a certain subframe or time slot, a first base station 302 may have a scheduled DL connection 310 with a first UE 304, and a second base station 306 may have a scheduled DL connection 312 with a second UE 308. The base stations and UEs of
To determine the interference from a transmitter (e.g., second base station 306) of the low priority link to a receiver of the high priority link (e.g., first UE 304), a pair of transmitter request signals (e.g., TR1 and TR2) and receiver response signals (e.g., RR1 and RR2) may be exchanged between the transmitters (e.g., BS1 and BS2) and receivers (e.g., UE1 and UE2). Each of the first base station 302 and second base station 306 may include a transmitter (e.g., transceiver 110 of
In one example, the first link 310 has a higher priority than the second link 312. The first base station 302 may transmit a first transmitter request (TR1) to the first UE 304, and the second base station 306 may transmit a second transmitter request (TR2) to the second UE 308. The TR1 and TR2 may be transmitted at a certain power P or a predetermined power. In some examples, the TR1 and TR2 may be transmitted at different power levels. The first UE 304 receives the TR1 and measures the DLRP as h11*P (i.e., a fraction of P, where h11 is a value between 0 and 1). The first UE 304 then transmits a receiver response (RR1) at the power P or a predetermined power. The RR1 includes information of the DLRP. For example, the RR1 may carry an encoded value (a quantized or digitized value) of the DLRP.
The second base station 306 may receive the RR1 of the first UE 304 at a power h21*P (h21 is a value between 0 and 1). That is, the power of the RR1 received by the second base station 306 is equal to h21*P (i.e., a fraction of P). From the received RR1, the second base station 306 may determine the first link's DLRP (e.g., h11*P). Therefore, if the first base station 302 and second base station 306 both transmit at the same time or simultaneously, it can be determined that the first UE 304 will have a signal-to-interference ratio (SIR) of h11/h21. Accordingly, the second base station 306 of the lower priority link can determine whether or not it may transmit based on the SIR. For example, the second base station 306 may transmit if the SIR is greater a certain value (e.g., a predetermined value). Similar operations may be performed for the DL connection 310 using TR2 and RR2 to determine an SIR at the second UE 308, if the relative priority of the links are reversed. In other aspects of the disclosure, similar operations may be performed at the base station or UE to determine the interference between two links or connections for different UL and DL combinations and relative priority.
In one aspect of the disclosure, nearby cells may be synchronized in traffic direction initially. For example, for each subframe, time slot, or TTI of a TDD network, nearby cells (e.g., BS1 302 and BS2 306) may be configured for either uplink (UL) or downlink (DL). However, there are scenarios that a traffic direction may be switched (e.g., UL-to-DL switch or DL-to-UL switch) during a subframe, time slot, or TTI. For example, if a cell or base station has no DL data for a certain DL subframe, then the base station may switch the scheduled DL to a switched UL to increase spectral efficiency. Similar switching may be made from UL to DL. However, this DL-to-UL or UL-to-DL switch may introduce interference patterns that need to be considered and managed.
In another example, the first base station 402 may have an UL-to-DL switched downlink connection with the first UE 404, and the second base station 406 has a scheduled (non-switched) uplink connection with the second UE 408. Similarly, the UL-to-DL switching may cause DL-to-UL interference and UL-to-DL interference between the base stations and UEs. In one aspect of the disclosure, the switched link or connection may have lower or higher priority than the non-switched or scheduled link. In some aspects of the disclosure, the priority order between the links may be overridden in certain conditions. In some examples, if a low priority link has mission critical data, time-sensitive, or other high priority data to transmit in a certain time slot or subframe, the high priority link with delay tolerant data or low priority data may yield to the low priority link (i.e., priority overridden). Throughout this disclosure, link and connection denote a wireless communication connection between two wireless entities (e.g., BS and UE), and these terms may be used interchangeably unless expressly stated otherwise.
In
In one aspect of the disclosure, a signal-to-interference ratio (SIR) (an UL-to-DL interference) at the first UE 404 (UE1) due to the switched UL may be determined based on the TR and RR of the DL connection, using a method similar to that described in relation to
The DL subframe may include a DL pre-scheduling block 602, one or more DL scheduling response blocks 604, one or more DL grant blocks 606. DL data 606, and an acknowledgement (ACK) 608. The first base station 402 transmits the DL pre-scheduling response block 604, DL grant blocks 606, and DL data 606 to the first UE 404. The first UE 404 transmits DL scheduling responses 604 and ACK 608 to the first base station 402.
The switched UL subframe may include an UL pre-scheduling block 610, a scheduling response block 612, an UL scheduling response block 614, an UL grant block 616, UL data 618, and ACK 620. As described in more detail below, the scheduling response block 612 is repurposed to send an override signal to the first base station 402 to override link priority. The second base station 406 transmits the UL pre-scheduling block 610 and UL grant block 616 to the second UE 408. The second UE 408 transmits the UL scheduling response block 614 to the second base station 406.
In one aspect of the disclosure, the switched UL may be utilized to transmit mission critical traffic, time-sensitive data, or other high priority data in a certain subframe, TTI, or time slot. One example of high priority data may be mission critical data with strict delay constraints. In this example, the scheduled DL yields to the switched UL if the DL transmission of the first base station 402 may cause undesirable interference to the second base station 406 that is receiving UL transmission from the second UE 408. To let the DL base station knows that the switched UL is of higher priority, the switched UL base station may transmit a priority overriding signal (e.g., priority override 412 in
After receiving this priority override signal 412, the DL base station (first base station 402) becomes aware that there is a switched UL with higher priority. Therefore, the DL base station may inform the first UE 404 in a DL grant 606 that there is a switched UL with higher priority. For example, the DL grant 606 may include one or more bits that may be set to a certain value to indicate high priority. For the switched UL, the second UE 408 transmits an uplink scheduling response 614, which may serve as a TR. In response, the UL base station transmits an uplink grant 616, which may serve as a RR. In the meantime, the DL base station (first base station 402) and/or the DL UE (first UE 404) may listen to the UL TR 614 and RR 616 signals to determine the interference (e.g., an SIR) at the second base station 406 due to the scheduled DL, using a method similar to that described in relation to
In one aspect of the disclosure, the switched link or connection (e.g., switched DL 703) may have lower or higher priority than the non-switched or scheduled link (e.g., scheduled UL 710). In some aspects of the disclosure, the priority order between the links or connections may be overridden in certain conditions. In some examples, if a low priority link has mission critical data, time-sensitive data, or other high priority data to transmit in a certain time slot or subframe, the high priority link with delay tolerant data or low priority data may yield to the low priority link (i.e., priority overridden).
In this example, the scheduled UL 710 is of higher priority. Therefore, the second base station 706 and the second UE 708 may not listen to the TR and RR signals of the switched DL 703. In one aspect of the disclosure, an uplink scheduling response block 804 and an UL grant block 806 may serve as the TR and RR, respectively, of the UL connection. For the switched DL, which is of lower priority, the first base station 702 informs the first UE 704 that this subframe is switched to DL in the UL uplink pre-scheduling block 812. Then the first base station 702 and/or its first UE 704 listen to the TR and RR (e.g., an uplink scheduling response block 804 and an UL grant block 806) of the scheduled UL to determine whether or not the switched DL yields to the scheduled UL based on the interference between the UL and DL.
In one aspect of the disclosure, the SIR (interference) at the second base station 706 due to the switched DL may be determined based on the TR and RR of the scheduled UL, using a method similar to that described in relation to
In one aspect of the disclosure, the scheduled UL may yield to the switched DL if the UL transmission will cause undesirable interference to the switched DL. To let the second UE 708 (UL UE) know that the switched DL is of a high priority, the first UE 704 (DL UE) may transmit a priority overriding signal (e.g., overriding signal 712 in
At block 1004, the first scheduling entity reconfigures the first connection to reverse a payload data direction of the first connection during the same subframe, such that a link priority of the reconfigured first connection (e.g., switched UL 410) is initially lower than that of the second connection (e.g., scheduled DL 403) between the second scheduling entity and second UE. Reconfiguration of a connection (e.g., first connection) between a scheduling entity and a UE may include one or more exchanges of messages or signaling between the scheduling entity and the UE such that the scheduling may allocate, reallocate, remove, assign, and/or reassign resources of the scheduling entity and/or the UE to initiate, establish, maintain, and/or release the connection. The resources may include channels, carriers, signaling bearers, radio bearers, data bearers, radio access technology, modems, etc.
In one example, the first scheduling entity may reconfigure a scheduled DL connection 407 to a switched UL 410 such that the payload data direction is switched or reversed from DL data to UL data. In this case, the low priority reconfigured first connection (e.g., switched UL 410) yields to the high priority second connection (e.g., scheduled DL 403) if transmission of the low priority reconfigured first connection may cause significant or undesirable interference to the high priority second connection. In one example, the first scheduling entity may utilize a DL/UL switching block 122 of
At block 1006, the first scheduling entity (e.g., base station 406) transmits a priority override signal (e.g., priority override 412) to the second scheduling entity (e.g., base station 402) to modify (e.g., increase) the link priority of the reconfigured first connection to be higher than that of the second connection during the subframe, such that a transmission of the reconfigured first connection has priority over the second connection during an interference between the reconfigured first connection and the second connection. In one example, the first scheduling entity may utilize a priority overriding block (e.g., priority overriding block 124 of
At block 1104, the first scheduling entity 402 may utilize the transceiver 110 to receive a priority override signal 412 from the second scheduling entity 406. The priority override signal may indicate that the second connection (e.g., DL connection 407) has been reconfigured in the same subframe to have a reversed payload data direction (e.g., opposite traffic direction), and the reconfigured second connection (e.g., switched UL connection 410) has a higher priority than the first connection (e.g., DL connection 403). At block 1106, the first scheduling entity 402 may utilize an interference management block 120 (see
At block 1108, if the interference is greater than a predetermined threshold (e.g., SIR is less than a predetermined threshold), the first scheduling entity 402 may utilize a priority overriding block 124 (see
At block 1204, the first UE 704 reconfigures the first connection (e.g., scheduled UL connection 701) to reverse a payload data direction of the first connection during the same subframe, such that a link priority of the reconfigured first connection (e.g., switched DL connection 703) is initially lower than that of the second connection between the second scheduling entity 706 and second UE 708. Therefore, the low priority switched DL connection 703 yields to the high priority UL connection 710 if transmission of the low priority link may cause significant or undesirable interference to the high priority link. In one example, the first UE 704 may utilize a downlink/uplink switching block (e.g., DL/UL switching block 122 of
At block 1206, the first UE 704 transmits a priority override signal 712 to the second UE 708 to modify (e.g., increase) the link priority of the reconfigured first connection (e.g., switched DL connection 703) to be higher than that of the second connection (e.g., UL connection 710) during the same subframe, such that a transmission of the reconfigured first connection has priority over the second connection based on an interference between the second connection and reconfigured first connection. In one example, the first UE 704 may utilize a priority overriding block (e.g., priority overriding block 124 of
At block 1304, the first UE 708 may utilize the transceiver 110 to receive a priority override signal 712 from the second UE 704. The priority override signal may indicate that the second connection (e.g., scheduled UL connection 701) has been reconfigured such that the second connection has a reversed payload data direction (e.g., opposite traffic direction), and the reconfigured second connection (e.g., switched DL connection 703) has a higher priority than the first connection (e.g., scheduled UL connection 710). At block 1306, the first UE 708 may utilize an interference management block 120 (see
At block 1308, if the interference is greater than a predetermined threshold (e.g., SIR is less than a predetermined threshold), the first UE 708 may utilize a priority overriding block 124 (see
It is understood that the specific order or hierarchy of steps in the processes disclosed is an illustration of exemplary approaches. Based upon design preferences, it is understood that the specific order or hierarchy of steps in the processes may be rearranged. The accompanying method claims present elements of the various steps in a sample order, and are not meant to be limited to the specific order or hierarchy presented.
The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects. Thus, the claims are not intended to be limited to the aspects shown herein, but is to be accorded the full scope consistent with the language claims, wherein reference to an element in the singular is not intended to mean “one and only one” unless specifically so stated, but rather “one or more.” Unless specifically stated otherwise, the term “some” refers to one or more. All structural and functional equivalents to the elements of the various aspects described throughout this disclosure that are known or later come to be known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the claims. Moreover, nothing disclosed herein is intended to be dedicated to the public regardless of whether such disclosure is explicitly recited in the claims. No claim element is to be construed under the provisions of 35 U.S.C. § 112(f), unless the element is expressly recited using the phrase “means for” or, in the case of a method claim, the element is recited using the phrase “step for.”
Claims
1. A method of managing interference in a wireless network comprising a first cell and a second cell, the method comprising:
- communicating in the first cell, at a first apparatus, with a second apparatus using a first connection configured with a payload data direction that is synchronized with a payload data direction of a second connection, in the second cell, between a third apparatus and a fourth apparatus;
- reconfiguring, at the first apparatus, the first connection such that the payload data direction of the first connection is not synchronized with the payload data direction of the second connection; and
- transmitting, at the first apparatus, a priority override signal to the third apparatus to modify a link priority of the reconfigured first connection to be higher than that of the second connection, such that a transmission of the reconfigured first connection has priority over the second connection during an interference between the second connection and the reconfigured first connection.
2. The method of claim 1, wherein the reconfiguring comprises:
- transmitting, to the second apparatus, an uplink pre-scheduling block in a subframe, the uplink pre-scheduling block configured to indicate that the first connection is reconfigured to reverse the payload data direction; and
- receiving, from the second apparatus, an uplink scheduling response block in the subframe as a response to the uplink pre-scheduling block.
3. The method of claim 2, wherein transmitting the priority override signal comprises:
- transmitting, in the subframe, the priority override signal between the uplink pre-scheduling block and the uplink scheduling response block.
4. The method of claim 3, wherein the transmitting the priority override signal further comprises:
- transmitting the priority override signal when the first apparatus communicates at least one of mission critical traffic, time-sensitive data, or high priority data, with the second apparatus.
5. The method of claim 1, wherein the reconfiguring comprises:
- receiving, from the second apparatus, a downlink (DL) pre-scheduling block in a subframe, the DL pre-scheduling block configured to indicate that the first connection is reconfigured to a DL payload data direction; and
- transmitting, to the second apparatus, a DL scheduling response block in the subframe as a response to the DL pre-scheduling block.
6. The method of claim 5, wherein transmitting the priority override signal comprises:
- transmitting, in the subframe, the priority override signal prior to the DL pre-scheduling block and the DL scheduling response block.
7. The method of claim 6, wherein the transmitting the priority override signal further comprises:
- transmitting the priority override signal when the first apparatus communicates at least one of mission critical traffic, time-sensitive data, or high priority data, with the second apparatus.
8. A first apparatus for wireless communication comprising:
- a communication interface configured for wireless communication in a wireless network comprising a first cell and a second cell;
- a memory; and
- a processor operatively coupled with the communication interface and the memory,
- wherein the processor and the memory are configured to:
- communicate, in the first cell, with a second apparatus using a first connection configured with a payload data direction that is synchronized with a payload data direction of a second connection, in the second cell, between a third apparatus and a fourth apparatus;
- reconfigure the first connection such that the payload data direction of the first connection is not synchronized with the payload data direction of the second connection; and
- transmit a priority override signal to the third apparatus to modify a link priority of the reconfigured first connection to be higher than that of the second connection, such that a transmission of the reconfigured first connection has priority over the second connection during an interference between the second connection and the reconfigured first connection.
9. The first apparatus of claim 8, wherein the processor and the memory are further configured to reconfigure the first connection by:
- transmitting, to the second apparatus, an uplink pre-scheduling block in a subframe, the uplink pre-scheduling block configured to indicate that the first connection is reconfigured to reverse the payload data direction; and
- receiving, from the second apparatus, an uplink scheduling response block in the subframe as a response to the uplink pre-scheduling block.
10. The first apparatus of claim 9, wherein the processor and the memory are further configured to:
- transmit, in the subframe, the priority override signal between the uplink pre-scheduling block and the uplink scheduling response block.
11. The first apparatus of claim 10, wherein the processor and the memory are further configured to:
- transmit the priority override signal when the first apparatus communicates at least one of mission critical traffic, time-sensitive data, or high priority data, with the second apparatus.
12. The first apparatus of claim 8, wherein the processor and the memory are further configured to reconfigure the first connection by:
- receiving, from the second apparatus, a downlink (DL) pre-scheduling block in a subframe, the DL pre-scheduling block configured to indicate that the first connection is reconfigured to a DL payload data direction; and
- transmitting, to the second apparatus, a DL scheduling response block in the subframe as a response to the DL pre-scheduling block.
13. The first apparatus of claim 12, wherein the processor and the memory are further configured to:
- transmit, in the subframe, the priority override signal prior to the DL pre-scheduling block and the DL scheduling response block.
14. The first apparatus of claim 13, wherein the processor and the memory are further configured to:
- transmit the priority override signal when the first apparatus communicates at least one of mission critical traffic, time-sensitive data, or high priority data, with the second apparatus.
15. A first apparatus in a wireless network comprising a first cell and a second cell, the first apparatus comprising:
- means for communicating in the first cell with a second apparatus using a first connection configured with a payload data direction that is synchronized with a payload data direction of a second connection, in the second cell, between a third apparatus and a fourth apparatus;
- means for reconfiguring the first connection such that the payload data direction of the first connection is not synchronized with the payload data direction of the second connection; and
- means for transmitting a priority override signal to the third apparatus to modify a link priority of the reconfigured first connection to be higher than that of the second connection, such that a transmission of the reconfigured first connection has priority over the second connection during an interference between the second connection and the reconfigured first connection.
16. The first apparatus of claim 15, wherein the means for reconfiguring the first connection is configured to:
- transmit, to the second apparatus, an uplink pre-scheduling block in a subframe, the uplink pre-scheduling block configured to indicate that the first connection is reconfigured to reverse the payload data direction; and
- receive, from the second apparatus, an uplink scheduling response block in the subframe as a response to the uplink pre-scheduling block.
17. The first apparatus of claim 16, wherein the means for transmitting the priority override signal is configured to:
- transmit, in the subframe, the priority override signal between the uplink pre-scheduling block and the uplink scheduling response block.
18. The first apparatus of claim 17, wherein the means for transmitting the priority override signal is further configured to:
- transmit the priority override signal when the first apparatus communicates at least one of mission critical traffic, time-sensitive data, or high priority data, with the second apparatus.
19. The first apparatus of claim 15, wherein the means for reconfiguring the first connection is configured to:
- receive, from the second apparatus, a downlink (DL) pre-scheduling block in a subframe, the DL pre-scheduling block configured to indicate that the first connection is reconfigured to a DL payload data direction; and
- transmit, to the second apparatus, a DL scheduling response block in the subframe as a response to the DL pre-scheduling block.
20. The first apparatus of claim 19, wherein means for transmitting the priority override signal is configured to:
- transmit, in the subframe, the priority override signal prior to the DL pre-scheduling block and the DL scheduling response block.
21. The first apparatus of claim 20, wherein the means for transmitting the priority override signal is further configured to:
- transmit the priority override signal when the first apparatus communicates at least one of mission critical traffic, time-sensitive data, or high priority data, with the second apparatus.
22. A non-transitory computer-readable medium storing computer-executable code, comprising code for causing a first apparatus in a wireless network to:
- communicate, in a first cell, with a second apparatus using a first connection configured with a payload data direction that is synchronized with a payload data direction of a second connection, in a second cell, between a third apparatus and a fourth apparatus;
- reconfigure the first connection such that the payload data direction of the first connection is not synchronized with the payload data direction of the second connection; and
- transmit a priority override signal to the third apparatus to modify a link priority of the reconfigured first connection to be higher than that of the second connection, such that a transmission of the reconfigured first connection has priority over the second connection during an interference between the second connection and the reconfigured first connection.
23. The non-transitory computer-readable medium of claim 22, wherein the code further causes the first apparatus to reconfigure the first connection by:
- transmitting, to the second apparatus, an uplink pre-scheduling block in a subframe, the uplink pre-scheduling block configured to indicate that the first connection is reconfigured to reverse the payload data direction; and
- receiving, from the second apparatus, an uplink scheduling response block in the subframe as a response to the uplink pre-scheduling block.
24. The non-transitory computer-readable medium of claim 23, wherein the code further causes the first apparatus to transmit the priority override signal by:
- transmitting, in the subframe, the priority override signal between the uplink pre-scheduling block and the uplink scheduling response block.
25. The non-transitory computer-readable medium of claim 24, wherein the code further causes the first apparatus to transmit the priority override signal by:
- transmitting the priority override signal when the first apparatus communicates at least one of mission critical traffic, time-sensitive data, or high priority data, with the second apparatus.
26. The non-transitory computer-readable medium of claim 22, wherein the code further causes the first apparatus to reconfigure the first connection by:
- receiving, from the second apparatus, a downlink (DL) pre-scheduling block in a subframe, the DL pre-scheduling block configured to indicate that the first connection is reconfigured to a DL payload data direction; and
- transmitting, to the second apparatus, a DL scheduling response block in the subframe as a response to the DL pre-scheduling block.
27. The non-transitory computer-readable medium of claim 26, wherein the code further causes the first apparatus to transmit the priority override signal by:
- transmitting, in the subframe, the priority override signal prior to the DL pre-scheduling block and the DL scheduling response block.
28. The non-transitory computer-readable medium of claim 27, wherein the code further causes the first apparatus to transmit the priority override signal by:
- transmitting the priority override signal when the first apparatus communicates at least one of mission critical traffic, time-sensitive data, or high priority data, with the second apparatus.
Type: Application
Filed: Nov 5, 2019
Publication Date: Feb 27, 2020
Inventors: Hua WANG (Basking Ridge, NJ), Junyi LI (Chester, NJ), Tingfang JI (San Diego, CA), Naga BHUSHAN (San Diego, CA)
Application Number: 16/675,025