Abstract: A communication system (1) comprises a transmitter (2), a receiver (3), and an up/down link communication channel (4, 6) arranged for data communication from the transmitter (2) through the up link communication channel (4) to the receiver (3). The communication system (1) is further arranged to feedback data from the receiver (3) through the down link communication channel (6) to the transmitter (2). The receiver (3) comprises a bad frame indicator (5) for providing a bad frame indication (BFI) upon receipt of a corrupted frame, which is present in synchronized data communicated over the up link communication channel (4); and the transmitter (2) comprises resynchronization means (7) coupled to the down link communication channel (6) for receiving BFI related data and in response thereto recommencing data communication over the up link communication channel (4), in accordance with a resynchronization procedure, which starts from a predetermined state.

Abstract: A radio channel assignment judgement method and a radio channel control device in a mobile communication system, capable of preventing a rapid tolerance degradation with respect to the identical frequency interference associated with a degradation of a receiving level of a communication channel that is caused, for example, by a moving of the mobile station, are disclosed.

Abstract: On receiving a link channel assignment request or a link channel reassignment request from a mobile station, a wireless base station specifies a unique word (UW) that is not assigned to any other mobile stations, and sends a channel assignment notification containing the specified UW to the requesting mobile station. The base station also sends the specified UW to its user processing unit, which extracts a signal sent from the requesting mobile station and generates a signal to be sent to this mobile station. The base station then defines a reference signal based on the sent UW, and adjusts each weight vector by using the defined reference signal and a signal estimated to have been sent from the requesting mobile station, thereby directing the directivity pattern to the requesting mobile station.

Abstract: A method (700) and a mobile station (160) for reporting multi-path signals based on minimum separation are described herein. The mobile station (160) may include a list with a first energy/position pair corresponding to the energy parameter and the position parameter associated with a first multi-path signal of a synchronization code. The mobile station (160) may generate a second energy/position pair corresponding to the energy parameter and the position parameter of a second multi-path signal. The mobile station (160) may detect the position parameter of the second energy/position pair being within a minimum separation associated with the position parameter of the first energy/position pair. The mobile station (160) may also detect the energy parameter of the second energy/position pair being greater than the energy parameter of the first energy/position pair. Accordingly, the mobile station (160) may replace the first energy/position pair on the list with the second energy/position pair.

Abstract: The invention relates to a mobile radio set (M) for a cellular network. In order to enable a more reliable determination as to whether a mobile radio set has been moved between switching off and subsequent switching on, the following elements are provided: a first storage section (S1) for storing all relevant channels, acquisition means (E1) for measuring, for the channels stored in the first storage means (S1) prior to the switching off and after the switching on of the mobile radio set (M), a variable which is dependent on the distance between the mobile radio set (M) and the base stations that make a channel available, a second storage section (S2) for storing the variables measured before the switching off, and evaluation means (A) for determining a value characterizing the deviation between the variables stored in the second storage section (S2) and the variables measured after the switching on. Comparison of this value with a predetermined value then enables the decision that movement has taken place.

Abstract: Signal strength measurements for different frequencies in different cells are calibrated in a cellular communications system. The signal strength of first and second frequencies in at least one cell of a plurality of cells is repeatedly measured. A measurement history is created for said first and second frequencies in at least the one cell. Each measurement history is based on the signal strength measurements of one of the first and second frequencies in the respective one cell. The measurement histories are stored. A respective correction factor is determined for each possible pair of first and second frequencies in at least the one cell. Each correction factor is based on the stored measurement history of the first and second frequencies in the pair. The respective correction factor for a pair of first and second frequencies cell is applied when comparing the signal strength measurements of the first and second frequencies in said pair.

Abstract: A multicast radio data communication system comprising a master (1) and a plurality of slave stations (2, 3, 4), and using a retransmission protocol. Data is transmitted by the master station and received by the slave stations. One slave station is designated the primary slave station, and all other slaves are designated secondary slave stations. Any slave station may transmit a negative acknowledgement but only the primary slave may transmit a positive acknowledgement. Positive and negative acknowledgements are transmitted substantially simultaneously. Negative acknowledgements corrupt reception of the positive acknowledgement by the master station, thereby ensuring that the data is retransmitted. The primary slave station is selected to have the lowest quality radio link, which may be ensured by a power control command from the master.

Abstract: A wireless communication system includes at each cell at least one network part of the system communicating with subscriber terminals in its area. Within the system, a method for transmitting reception information on a receiving end to a transmitter includes measuring the quality of a signal received from a terminal, such as the bit error ratio (BER) of the signal, and transmitting the measured quality information to the terminal to be indicated to the user of the terminal, or transmitting an announcement selected on the basis of the quality information to the terminal via the network part to be indicated to the user.

Abstract: RF communications received by a wireless terminal from a servicing base station are used to determine the channel quality such as reported bit error probability (BEP). The RF communications may be in the form of RF bursts that are part of a data frame. An estimated BEP may be determined from the signal to noise ratio (SNR) of the RF bursts and or a sequence of soft decisions extracted from the RF bursts, and their historical performance. The SNR maps to an estimated BEP based upon the modulation format of the RF bursts. The soft decisions decode to produce a data block. When the soft decisions decoded favorably, the re-encoded data block produces a sequence of re-encoded decisions. Comparing the re-encoded decisions to the soft decisions yields a re-encoded bit error (RBER). The reported BEP may be based upon the estimated BEP, RBER, and/or RBER threshold. The RBER threshold may be adaptively incremented or decremented depending upon whether or not the RF communications were properly decoded.

Abstract: The performance and ease of management of wireless communications environments is improved by a mechanism that enables access points (APs) to perform automatic channel selection. A wireless network can therefore include multiple APs, each of which will automatically choose a channel such that channel usage is optimized. Furthermore, APs can perform automatic power adjustment so that multiple APs can operate on the same channel while minimizing interference with each other. Wireless stations are load balanced across APs so that user bandwidth is optimized. A movement detection scheme provides seamless roaming of stations between APs.

Abstract: A method and apparatus for controlling a data transmission rate between at least one transmitter and a plurality of terminals in a wireless communication system. A first data transmission rate for the transmitter is determined, and the first data transmission rate of the transmitter is changed to a second data transmission rate based at least in part upon a predefined condition being satisfied. Data is transmitted to the plurality of access terminals using the second data transmission rate. In one embodiment the first data transmission rate of the transmitter is changed to the second data transmission rate providing that a predetermined percentage of the plurality of terminals can receive data from the transmitter using the second data transmission rate.

Abstract: The modulation/demodulation unit modulates information to be transmitted, or demodulates: information received. The time slot control unit allocates time slots to the terminal apparatus. The control signal processing unit extracts a signal indicating a disconnection request from a signal for requesting time slot allocation, received from the terminal apparatus in an inactive state in particular. The modulation mode control unit determines a modulation mode suitable for channel quality derived by the quality derivation unit. The modulation mode control unit determines to use a predetermined modulation mode when it receives an instruction for performing disconnection from the control signal processing unit.

Abstract: To address the need to provide listening participants of CDMA dispatch services soft handoff signaling capability, the concept of “shared channel signaling windows” for shared traffic channels (e.g., 110) is described. In one embodiment, the base site (105) announces the beginning of a signaling window for the traffic channel, allowing remote units (e.g., MS 120) that need to send handoff signaling an opportunity. In response to such signaling, the base site directs soft handoff information to the signaling remote units via the traffic channel. However, all the remote units that share the traffic channel can store this soft handoff information and later use the information to initiate soft handoffs without needing to exchange handoff messaging with the base site. Thus, a CDMA-dispatch, shared-channel implementation is enabled by providing soft handoff signaling windows and the over-the-air, soft-handoff messaging required for dispatch services is reduced.

Abstract: A method for scheduling RRM procedures in a wireless communication system begins by receiving at least one trigger, each trigger being associated with at least one RRM procedure. A radio link is placed into a busy state, whereby the radio link is accessible only by a currently executing RRM procedure. The RRM procedure is performed on the radio link, and a set of predicted measurements is prepared for use by the other RRM procedures. The radio link is placed into an idle state, whereby the radio link is accessible by any RRM procedure.

Abstract: The performance and ease of management of wireless communications environments is improved by a mechanism that enables access points (APs) to perform automatic channel selection. A wireless network can therefore include multiple APs, each of which will automatically choose a channel such that channel usage is optimized. Furthermore, APs can perform automatic power adjustment so that multiple APs can operate on the same channel while minimizing interference with each other. Wireless stations are load balanced across APs so that user bandwidth is optimized. A movement detection scheme provides seamless roaming of stations between APs.

Abstract: A method of scheduling data communication over an uplink. The method enables two or more users seeking to transmit data over the uplink to be scheduled in response to their path loss. The user having the most attractive determined path loss among the two or more users seeking to transmit data over the uplink us scheduled first. Thereafter, the next user having the next most attractive path loss among the remaining users may be subsequently scheduled if the total noise rise leftover is greater than zero. This process repeats so long as or until the total noise rise leftover is about zero.

Abstract: In a mobile radio communications system, first radio resources are allocated to a first mobile radio communication. The term “radio resources” relates to one or more resources used to support a mobile radio communication and may include, for example, radio bandwidth, transmit power, signal and data processing hardware and software resources, radio transceiving resources, etc. A second group of radio resources is allocated to a second mobile radio communication. When a block of user information needs to be transmitted that requires an additional amount of radio resources, the first and second mobile radio communications are interrupted or their service levels are reduced for a brief time period. At least part of the block of information is transmitted during that time period using at least some of the first and second radio resources allocated for the first and second mobile radio communications.

Abstract: A mobile switching center switches telephone calls in a time division multiplex access wireless communications network architecture. A communications controller in the mobile switching center is adapted to control communications between the mobile switching center and at least one base station controller. An interworking function in the mobile switching center is adapted to transfer information between the mobile switching center and another network other than the wireless communications network. A compact data services unit (CDSU) causes said mobile switching center to automatically detect, whenever a downgrade procedure occurs during a data call switched through said mobile switching center, the subchannels of the telephone call dropped in the downgrade procedure network.

Abstract: Under present circumstances, where an increasing number of wireless communication systems employ the QAM method as a modulation method for frequency use efficiency enhancement as the speed of information transmission in the wireless communication systems increases, it is an object of the present invention to provide a channel estimation method for estimating a channel efficiently and accurately and establishing communication at high quality, that is, providing communication with excellent error rate characteristics. To achieve the above object, the present invention improves characteristics by calculating the channel estimation results variously for all data signal symbols and using them for demodulation. To accomplish the object, the present invention also pays attention to the frequency characteristics of fading in a radio propagation path and enhances the accuracy in channel estimation result calculation by using a band pass filter for eliminating the thermal noise that would increase the estimation error.

Abstract: Methods of using superposition coding in a communications systems, e.g., a multi-user communications system. Superpostion coding in accordance with the invention occurs in the case of an uplink by transmissions of different wireless terminals transmitting using the same communications resource, e.g., simultaneously transmitting using the same frequencies. The signals combine in the communications channel resulting in one transmission being superimposed on the other transmission. The device, e.g., base station, receiving the superimposed signals uses superposition decoding techniques to recover both signals. To obtain the benefit of the superposition, assignments of channel segments to multiple wireless terminals is controlled by the base station and/or transmission power levels are controlled by on or more wireless terminals sharing the same uplink communications resource, e.g.

Abstract: The performance and ease of management of wireless communications environments is improved by a mechanism that enables access points (APs) to perform automatic channel selection. A wireless network can therefore include multiple APs, each of which will automatically choose a channel such that channel usage is optimized. Furthermore, APs can perform automatic power adjustment so that multiple APs can operate on the same channel while minimizing interference with each other. Wireless stations are load balanced across APs so that user bandwidth is optimized. A movement detection scheme provides seamless roaming of stations between APs.

Abstract: A wireless communication system includes a queue status detection unit for detecting the amount of unit data being used for communication between a plurality of external devices, and deciding a class parameter T of one of the external devices; a counter for counting the number of giving-away times of the external device based on the giving-away of communication opportunities to communicate with the plurality of external devices, and deciding a delay parameter D of an external device; a communication priority decision unit for calculating priority values P of an external device by using a class parameter and a delay parameter, and determining an external device having a priority out of the plurality of external devices based on the priority values; and a communication initiation unit for initiating data communications with the determined external device having the priority. Accordingly, a communication method considering both throughput and fairness can be obtained.

Abstract: The invention relates to a channel allocation method and a system for channel allocation in a cellular radio network which comprises at least one base transceiver station (100) and at least one subscriber terminal (104) connected to the base transceiver station. (100) over a bi-directional radio link (108). The invention is characterized in that the impact of a possible channel allocation on the interference level of the cellular radio network is taken into account in the channel allocation decision. This interference control method makes it possible to increase the capacity of a cellular network and to utilize it more efficiently.

Abstract: A mobile station provides for a more robust reacquisition process with the base station. The mobile station performs an evaluation of the signal conditions from the base station. The mobile station may perform this evaluation at the end of a call, upon release, or immediately after release. If the signal is strong, the mobile station will jump directly back to the synchronization channel. However, if the signal has deteriorated, the mobile station may determine it is more appropriate to reacquire the pilot signal of a base station. The mobile station may also use the signal characteristics to determine whether to perform a full acquisition, a quick acquisition, or a wide acquisition. The mobile station may also use a history to assist in the reacquisition process.

Abstract: A user equipment (UE) communicates with at least one cell defining an active set. A velocity vector including position, speed, and direction is associated with the UE. A radio network controller receives information related to the velocity vector and creates a filtered neighbor cell list by filtering a neighbor cell list associated with the active set. The filtering depends on the velocity vector related information. The controller transmits the filtered neighbor cell list to the user equipment so that pilot signal strength is measured for cells in that list.

Abstract: There is disclosed a method and apparatus for establishing multiple PDP contexts in a mobile communication system. The method comprises determining the number of PDP context requests required. Preferably this step is performed by the UE. The method comprises receiving all the required PDP context requests. This step is preferably performed in the network, i.e. in the SGSN and/or the GGSN. The method comprises establishing radio access resources for all the PDP context requests. This step is preferably initiated by the SGSN, and the RNC then preferably allocates the radio access resources based on SGSN requests.

Abstract: The object of the present invention is provide a mobile communication system which can improve a communication quality of the mobile communication system as a whole by changing a transmission method for transmitting common information. Each of the mobile stations 200a to 200l comprises a communication quality measurer 230 configured to measure a communication quality of a signal transmitted from the radio station 100a.

Abstract: A channel grouping system and method for a wireless communication system in which channels are allocated to channel groups according to received signal strength (RSS) data of mobile station accessing occurrences. A group allocator allocates the channels to the channel groups according to RSS data obtained from signals transmitted by a plurality of mobile stations. The channel groups correspond to a series of RSS power level intervals, and the RSS values are associated with the power level intervals into which the RSS values fall. The group allocator generates a probability density function describing the expected number of mobile station accessing occurrences having an RSS value falling within each power level interval. The group allocator then allocates a number of channels to each channel group according to the PDF.

Abstract: A frequency hopping spread spectrum cordless telephone system which arranges a swap table. The method and apparatus scans the electromagnetic interference energy content of the frequencies listed in the swap table, for example, when the base unit and hand-held unit are not in use. A controller thereafter arranges the frequencies in the swap table according to their respective electromagnetic interference energy content. During normal operation, upon detection of a degraded active or hop frequency, the controller selects the swap frequency with the lowest electromagnetic interference energy content, which preferably is in the first position in the swap table, to replace the degraded hop frequency.

Abstract: The transmit power of the subscriber terminals in a wireless network can be controlled by measuring the received power of a signal transmitted from an access point to a subscriber terminal at the subscriber terminal and then using the measured value as an index into a look-up table of transmit power attenuator settings. The use of a simple look-up table reduces the implementation complexity, since no complicated calculations must be performed to achieve effective power control.

Abstract: Channel estimation and spatial processing for a TDD MIMO system. Calibration may be performed to account for differences in the responses of transmit/receive chains at the access point and user terminal. During normal operation, a MIMO pilot is transmitted on a first link and used to derive an estimate of the first link channel response, which is decomposed to obtain a diagonal matrix of singular values and a first unitary matrix containing both left eigenvectors of the first link and right eigenvectors of a second link. A steered reference is transmitted on the second link using the eigenvectors in the first unitary matrix, and is processed to obtain the diagonal matrix and a second unitary matrix containing both left eigenvectors of the second link and right eigenvectors of the first link. Each unitary matrix may be used to perform spatial processing for data transmission/reception via both links.

Abstract: A method for locating a mobile station (MS) based on a power-related message of base transceiver stations (BTS) in a mobile communication system includes the steps of: by a call control processor (CCP) of a base station controller (BSC), checking an active set that the mobile station currently holds; by the call control processor, determining if the active set is covered over three base transceiver stations; if the active set is not covered over the three base transceiver stations, by frequency allocation of the active set, reading out status information of neighboring base transceiver stations; by the call control processor, determining if the frequency allocation of the active set is usable; if the frequency allocation is usable, transmitting to the mobile station a PSMRO (pilot strength message request order) that is a message for requesting to measure pilot strength of the frequency allocation; arranging a plurality of base transceiver stations in order of pilot strength based on the pilot strength measur

Abstract: When it is determined that the hand-over is necessary, a pilot strength measurement message is generated and transmitted to a base station BSa, under the hand-over request control. Arrival of an acknowledgement response from the base station BSa is monitored. If the acknowledgement response is not sent back before a timer times out, the receiving strength of a pilot channel PNa2 in the established synchronization and the receiving strengths of pilot channels PNb1 to PNb3 and PNc1 to PNc3 from neighboring base stations BSb, BSc and remaining base stations are re-measured, and the pilot strength measurement message including the latest measurement values obtained from the re-measurement is retransmitted to the base station BSa.

Abstract: A mobile station provides for a more robust reacquisition process with the base station. The mobile station performs an evaluation of the signal conditions from the base station. The mobile station may perform this evaluation at the end of a call, upon release, or immediately after release. If the signal is strong, the mobile station will jump directly back to the synchronization channel. However, if the signal has deteriorated, the mobile station may determine it is more appropriate to reacquire the pilot signal of a base station. The mobile station may also use the signal characteristics to determine whether to perform a full acquisition, a quick acquisition, or a wide acquisition. The mobile station may also use a history to assist in the reacquisition process.

Abstract: A method of creating a path list for use in finger assignments comprising clearing a list of paths (12), choosing a sector for consideration from an active set of sectors (14), establishing a searcher window around the sector for cosideration (16), and determining up to “n” local maxima stronger than a threshold value (18). If a sector under consideration is transmitting on supplemental channels(19), the method involves artificially biasing the findings of the searcher window by a predetermined value (20). The biasing value may be constant, variable or proportional to the number of supplemental channels on the base station. After the local maxima corresponding to base stations transmitting on supplemental channels have been biased (20), the path lists are created (21).

Abstract: A method of dynamic channel allocation in a frequency hopping communications system is disclosed providing improved efficiency and reliability. During the course of communications between a plurality of transceivers over a frequency hopping wireless communications link, a transceiver begins evaluating the performance of each channel in the hop sequence, starting at a fixed point in the sequence. The transceiver proceeds sequentially through the hop sequence, until a channel fails to satisfy a predetermined quality criterion. A channel which fails to satisfy the quality criterion is considered bad, and substituted with a replacement channel from a set of available channels via an unacknowledged channel replacement command. The channel evaluation process is subsequently reinitiated beginning anew at the fixed point in the hop sequence, thus operating to maintain a set of consecutive good channels.

Abstract: A criterion for biasing a binary decision requiring an unequal protection which utilizes a measured signal to interference ratio (SIR). The SIR may be derived from a determination of channel estimation. The SIR is compared against a threshold, the threshold being selected to bias the decision toward a NACK as opposed to an ACK determination. The technique is advantageous for providing biased binary decisions for high speed downlink packets (HSDP) but may be utilized for both uplink and downlink applications.

Abstract: A method of allocating bandwidth resources in a telecommunications network to which a plurality of devices are connected, involves the steps of: a) receiving from a first of the devices engaged in a call a suspend signal indicative that outgoing traffic from that device has been temporarily suspended, while the device remains engaged in the call; and b) upon receipt of the signal, allocating additional bandwidth to one or more other of the devices. The allocation of bandwidth can be carried out by one of the devices engaged in a call, or by a network bandwidth allocation device which oversees the bandwidth allocation used by each calling device and adjusts allocations dynamically as devices suspend and recommence their outgoing traffic. The adjustment of bandwidth allocation is preferably achieved by the device(s) switching codecs, and the suspend signals preferably result from the deactivation of transmissions in response to a voice activity detection unit in the first device.

Abstract: A transmitter directed, distributed receiver using multi-user diversity provided by the distribution of the receiver. Advantage is taken of the uncorrelated variations over time in the condition of communication links between a common transmitter and several users. The greater the variation in the quality of a particular link over time, the greater the increase in total system throughput provided. An scheduler metric (or scheduler metric) represents the instantaneous quality of the communication link between each user and the transmitter with respect to the average quality of the link. Alternatively, the scheduler metric represents the instantaneous channel condition with respect to the average data throughput over that channel. The common transmitting station uses the scheduler metric to directly compare the desirability of granting each channel access with the desirability of granting each other channel access. The users with links that have the greatest scheduler metric are provided access to the channels.

Abstract: A method of adjusting downlink transmission power at a base station based on the measured SIR relative to a referenced level in a mobile terminal. The referenced level can be the targeted SIR or zero. When the measured SIR is greater than the referenced level, the measured SIR is further compared to a first threshold value in order to determine the step size for power reduction. When the measured SIR is smaller than the referenced level, the measured SIR is further compared to a second threshold value in order to determine the step size for power increase. The first and second threshold values can be derived from the target SIR and TPC step size as provided in the RRC signal. Furthermore, the step values and threshold can be based on statistical analysis while the system is running.

Abstract: The carrier-to-interference ratio in a radio communication system is estimated by using measurements of the received signal strength in a communication channel within periods of time when transmission is discontinued and measurements of the received signal strength in the communication channel within periods of time with transmission.

Abstract: A wireless communication network contains a plurality of spatially distributed communication devices (access point devices and station devices) for exchanging wireless signal frames. A device processes signal frames only when a strength of the signals exceeds a carrier detection threshold. Devices defer an intended transmission upon detection of a wireless signal with a strength greater than a defer threshold prior to the intended transmission. A measuring circuit performs a first measurement of a first signal strength of signals from access point devices and a second measurement of a second signal strength of signals from station devices associated with a first one of the access point devices. A threshold adjustment circuit first sets the carrier detection threshold of a first one of the access point devices above the first signal strength. The second measurement is performed when said first setting has taken effect.

Abstract: A dynamic channel selection algorithm for a communication system including the steps of determining a channel metric indicative of a level of interference for a plurality of available channels; sorting the plurality of available channels according to their channel metrics; determining whether co-channel signaling is present on a available channel having a lowest channel metric; and selecting one of the available channels based upon whether the co-channel signaling is present on the available channel having the lowest channel metric. In variations, selection of an available channel is based upon whether co-channel signaling is present on available channels other than the available channel having a lower channel metric, and a difference between channel metrics of the available channel having the lowest channel metric and available channels having higher channel metrics.

Abstract: A wireless communication system and a mobile station employ at least one threshold to evaluate the quality of transmissions from a serving base station to determine when the mobile station enters a Dead Zone adjacent a border cell of the system. Such thresholds not only consider the ratio of carrier energy (Ec) to interference (Ec/Io) but also consider the energy of the carrier itself. When the relevant measured (or calculated) carrier energy Ec and/or carrier energy to interference ratio Ec/Io are passed, the mobile station performs system reselection, attempting to acquire a different system/carrier. The thresholds employed may be passed from the base station to the mobile station in the System Parameters message, for example.

Abstract: A printer that enables a determination whether a failure has occurred in a device during initialization or a radio wave condition is bad. Receive electric field strength during a time period from a time at which a turn-off message is outputted to a time at which turn-on message is outputted and receive electric field strength after the turn-on message is outputted are measured. The measurements are compared with each other and information indicating the condition of each of a plurality of channels is printed out according to the results of the comparison. A user can reference the printed information to determine whether a failure has occurred in a device or the radio wave condition is bad.

Abstract: A cellular radio system forms a non-homogeneous channel set and utilizes a dynamic channel assignment in a cellular radio system. This combination increases the number of candidate channels with essentially the same level of interference that is experienced with respect to utilizing a homogeneous channel set with a dynamic channel set. The resulting improvement increases the call capacity of a cellular radio system without requiring additional frequency spectrum. Hence, more cellular radio subscribers can be served simultaneously.

Abstract: There is provided a method of assigning service channel to traffic in communication system in which a subscriber's terminal is in communication with a base station through radio signals, including the steps of (a) reserving the predetermined number of channels in advance for traffic having a predetermined service rank, and (b) assigning channel preserved in advance, to the traffic having a predetermined service rank, only when there is no channel to be assigned to the traffic having a predetermined service rank. The method makes it possible to assign radio-signal channel to traffic having a high service rank, even if radio-signal channels are all occupied by traffics each having a low service rank.

Abstract: In response to determining that the total uplink (UL) interference in a cell has exceeded a predetermined threshold or value, a base station (BS) instructs a plurality of the mobile stations (MS) currently operating in the cell to reduce their current UL power by a predetermined amount (e.g., value of dB or percentage). Such instruction may override conventional closed loop PC instructions to the mobiles in certain embodiments. In such a manner, the UL power reduction is shared in a fairly equal manner by all mobile stations in the cell and overload can be reduced and/or avoided. Subsequently, mobiles stations moving away from the BS toward the cell border may be permitted to increase their UL power so as to maintain a connection. In certain embodiments, the invention is utilized in the context of a code division multiple access (CDMA) system.

Abstract: The present invention relates to a method and apparatus for determining channel degradation information in which a known data sequence is compared to a transmitted version of the known data sequence to provide such information.

Abstract: A method and system for autonomous two-way RF communication between a launch vehicle and at least one receiving or tracking station. Detection circuitry continuously determines the identity of the optimum receiving or tracking station (ground, sea, airborne, or satellite) and selects the best launch vehicle transmission antenna to close the RF telemetry link. The method and system is designed to simultaneously transmit and receive RF signals. The antenna system includes a telemetry transmission link and an antenna selection link. Antenna selection link signals received by each antenna element on the launch vehicle are provided via RF couplers to a receiver for signal strength and modulation signal detection. The telemetry transmission link communicates with a receiving or tracking station by using a transmitter to drive one of two or more switched antennas mounted on the surface of the launch vehicle having the current higher signal strength.