Abstract: Aspects of the disclosure provide for a method of efficiently implementing security configurations for multiple domains between a network entity and a UE in a wireless system. For instance, this disclosure provides for a network entity sending to a UE a first security mode command for a first domain, receiving a first security mode complete message in response to the first security mode command, and sending a second security mode command for a second domain. In an aspect, the second security mode command is sent in response to receiving the first security mode complete message. In an aspect, the UE does not receive a RLC acknowledgement. In another aspect, the UE saves the second security mode command until it receives the RLC acknowledgement. In an aspect, the network entity sends the second security mode command in response to receiving a message protected with first security procedure parameters.

Abstract: In aspects for controlling transmit power of dual carrier uplink transmission for wireless communications, a user equipment (UE) determines presence of transmit power imbalance between a first and second radio frequency (RF) carrier of respective dedicated physical control channels for uplink transmission. The UE determines an estimate of a remaining available transmit power after estimating the transmit power used by each of the dedicated physical control channels. The UE allocates the estimated remaining available transmit power to the first and second RF carrier respectively based on both a size of data granted for uplink transmission on each RF carrier and on an effective power per bit on each RF carrier. Additionally, the UE determines a higher reliability value for each RF carrier based on a lower data error rate, identifies priority values for data to be transmitted and sends higher priority data over the RF carrier with higher reliability value.

Abstract: Aspects related to performing power control over a secondary carrier are described. At least one parameter can be received for performing power control over a carrier with a cell. Based on the at least one parameter, at least one alternative parameter can be determined for performing a power control procedure for a secondary carrier with the cell, and the power control procedure for the secondary carrier with the cell can be performed based at least in part on the at least one alternative parameter. The at least one alternative parameter may result in a power control procedure for the secondary carrier that takes less time than a power control procedure for the primary carrier with the cell.

Abstract: In aspects for controlling transmit power of dual carrier uplink transmission for wireless communications, a user equipment (UE) determines presence of transmit power imbalance between a first and second radio frequency (RF) carrier of respective dedicated physical control channels for uplink transmission. The UE determines an estimate of a remaining available transmit power after estimating the transmit power used by each of the dedicated physical control channels. The UE allocates the estimated remaining available transmit power to the first and second RF carrier respectively based on both a size of data granted for uplink transmission on each RF carrier and on an effective power per bit on each RF carrier. Additionally, the UE determines a higher reliability value for each RF carrier based on a lower data error rate, identifies priority values for data to be transmitted and sends higher priority data over the RF carrier with higher reliability value.

Abstract: Aspects of the methods and apparatus relate to transferring a received Voice-over-Long Term Evolution (VoLTE) call to a High Speed Packet Access (HSPA) packet-switched (PS) based voice call. One aspect of the methods and apparatus include receiving a VoLTE call from a network and identifying uplink VoLTE handover characteristics of the VoLTE call for an uplink transmission to the network and a downlink VoLTE handover characteristics for a downlink transmission from the network. The aspect includes configuring uplink HSPA PS based handover characteristics that emulate the uplink VoLTE handover characteristics for the uplink transmission and configuring downlink HSPA PS based handover characteristics that emulate the downlink VoLTE handover characteristics for the downlink transmission.

Abstract: Aspects described herein relate to throttling packet-switched (PS) call establishment in wireless communications. A circuit-switched (CS) call can be conducted by using a first radio access technology (RAT). A cell update (CU) procedure for a PS call using a second RAT can be detected as due to one or more conditions. A cause for the one or more conditions can be determined based on one or more parameters related to a transmitter or receiver.

Abstract: Techniques for managing cell update messages are described here. An information element (IE) that indicates the security status of a user equipment (UE) may be included in the cell update message when a cell update procedure is triggered during an ongoing security mode procedure. To ensure the size of the cell update message is equal to or smaller than the transport format size, other IEs may be omitted from the cell update message if the security mode procedure is in progress. Alternatively, if the security mode procedure is not in progress, there may not be a need to update the security status of the UE and, thus, the IE that indicates the security status may be omitted from the cell update message to reduce the size of the cell update message.

Abstract: Methods and apparatuses are provided for synchronizing security parameters between access terminals and a wireless network. An access terminal and network entity can conduct a security mode procedure where the access terminal sends a security mode complete message to the network entity. On receipt of the security mode complete message, the network entity may update to new security parameters. The access terminal may initiate a mobility procedure while the security mode procedure is ongoing and may, as a result, abort the security mode procedure and revert back to the old security parameters. The access terminal can send a mobility update message to the network entity including a dedicated status indicator adapted to inform the network entity that the access terminal has reverted back to the old security parameters. In response to the mobility update message, the network entity may revert back to the old security parameters.

Abstract: Apparatus and methods of data communication between a transmitter and a receiver in a radio link control (RLC) unacknowledged mode (UM) include determining, by the transmitter, a hyper frame number (HFN) de-synchronization condition, wherein the HFN de-synchronization condition is FALSE when at least one protocol data unit (PDU) out of a plurality of successive PDUs is successfully transmitted by the transmitter to the receiver, and wherein the HFN de-synchronization condition is TRUE when all of the plurality of successive PDUs are lost, and adjusting, by the transmitter, a transmitter HFN of the transmitter when the HFN de-synchronization condition is TRUE, wherein the adjusted transmitter HFN is used for new PDUs to be transmitted.

Abstract: The present disclosure presents a method and apparatus for dynamically configuring a cell update message at a user equipment (UE). For example, the method may include determining that a size of the cell update message at the UE is above a threshold value after a “measured results on random access channel (RACH)” information element (IE) is excluded from the cell update message. Furthermore, such an example method may include removing one or more IEs from the cell update message until the size of the cell update message is at or below the threshold value. As such, dynamic configuration of a cell update message at a UE is achieved.

Abstract: The disclosure provides for recovering from radio link desynchronization. A network node may determining a first validity rate of a first plurality of protocol data units (PDUs) including a length indicator transmitted over the radio link using ciphering based on a hyperframe number and determining a second validity rate of a second plurality of PDUs without a length indicator transmitted over the radio link using ciphering based on the hyperframe number. The network node may detect desynchronization of the hyperframe number based on the first validity rate and the second validity rate. The network node may initiate a reset procedure to set a new hyperframe number for the radio link. The network node may detect desynchronization when the first validity rate is less than a first threshold, and the second validity rate is greater than or equal to a second threshold.

Abstract: Methods and apparatuses for enhanced cell update procedures are presented. In an aspect, an example method may include determining that a first cell update trigger has occurred and generating a first cell update message based on determining that the first cell update trigger has occurred. In an additional aspect, the example method may include determining that a second cell update trigger has occurred subsequent to the first cell update trigger and generating a second cell update message based on determining that the second cell update trigger has occurred. Furthermore, the example method may include determining that at least a portion of the first cell update message is pending transmission at a time that the second cell update message is generated, discarding the first cell update message, and transmitting the second cell update message to a network entity.

Abstract: An example method may include receiving, at a user equipment (UE), data on a primary carrier supported by the UE, wherein the UE exits a discontinuous reception (DRX) mode in response to receiving the data. Further, the example method may include determining from the data an indication at the UE that handling of one or more secondary carriers also supported by the UE is to be reactivated, wherein the handling of the one or more secondary carriers was deactivated at the UE when the primary carrier entered the DRX mode. In addition, the example method may include activating, at the UE, handling of the one or more secondary carriers in response to the indication.

Abstract: Certain aspects of the present disclosure relate to apparatuses and methods of managing signaling radio bearer (SRB) transmissions. In one aspect, the apparatuses and methods are configured to generate a SRB packet comprising signaling information, wherein the SRB packet is configured to be transmitted on a channel according to a scheduling serving grant, determine whether the SRB packet is unable to be transmitted based on resources allocated by the received scheduling serving grant, override the received scheduling serving grant in response to determining that the SRB packet is unable to be transmitted, and transmit at least a part of the SRB packet on the channel. In another aspect, a scheduling information message to indicate whether an additional scheduling severing grant is needed is transmitted on the channel along with at least the part of the SRB packet.

Abstract: Techniques for prioritizing non-scheduled data are described. Non-scheduled data to be transmitted on a non-scheduled MAC-d flow having a non-scheduled priority and scheduled data to be transmitted on a scheduled MAC-d flow having a scheduled priority may be identified by a user equipment (UE). The UE may transmit the non-scheduled MAC-d flow and the scheduled MAC-d flow according to a priority condition. In one aspect, the UE may receive a pre-allocation of power associated with a non-empty non-scheduled MAC-d flow. Based on a priority condition that the non-scheduled priority is a highest priority, the UE may apply all of the pre-allocation of power when transmitting the non-scheduled MAC-d flow. In one aspect, based on a priority condition that the non-scheduled priority is a lower priority, the UE may adjust the non-scheduled priority and/or the scheduled priority so that the non-scheduled priority is a higher priority.

Abstract: Apparatus and methods of improving call performance by enabling/continuing uplink transmissions during poor downlink radio conditions. The apparatus and methods further include monitoring, by a user equipment (UE), downlink (DL) signal conditions associated with a serving Node B. Moreover, the apparatus and methods include triggering an out-of-sync state upon a determination that the DL signal conditions have degraded beyond a DL signal quality threshold. Additionally, the apparatus and methods include delaying turning off of a power amplifier (PA) associated with transmission of uplink (UL) messages for a call performance improvement threshold time duration.

Abstract: Aspects of the disclosure provide a solution that a user equipment (UE) can avoid unnecessary transmission of uplink radio link control (RLC) protocol data units (PDUs) and transition between Radio Resource Control states in a Universal Mobile Telecommunications System (UMTS) network, thereby reducing signaling and power consumption overhead and latency at the UE.

Abstract: Aspects related to performing power control over a secondary carrier are described. At least one parameter can be received for performing power control over a carrier with a cell. Based on the at least one parameter, at least one alternative parameter can be determined for performing a power control procedure for a secondary carrier with the cell, and the power control procedure for the secondary carrier with the cell can be performed based at least in part on the at least one alternative parameter. The at least one alternative parameter may result in a power control procedure for the secondary carrier that takes less time than a power control procedure for the primary carrier with the cell.

Abstract: The present disclosure presents a method and an apparatus for managing radio resource control (RRC) state transitions at a user equipment (UE). For example, the method may include transmitting a reconfiguration complete message to a network entity, starting a reselection delay timer simultaneously with the transmitting of the reconfiguration complete message, identifying initiation of a cell reselection procedure at the UE, delaying the cell reselection procedure at the UE until the UE receives a layer 2 acknowledgement (L2 ACK) message from the network entity, stopping the reselection delay timer in response to receiving the L2 ACK message, and transitioning the UE to a cell_paging channel (cell_PCH) state from a cell_forward access channel (cell_FACH) state after the stopping of the reselection delay timer. As such, managing RRC state transitions at a UE may be achieved.

Abstract: The present disclosure presents a method and apparatus for improving uplink (UL) performance at a user equipment (UE). For example, the method may include identifying a random access channel (RACH) preamble failure when the UE is communicating with a current serving cell of the UE, increasing transmission power of successive RACH preambles based at least on the identifying, comparing signals received on a downlink at the UE via a first path and a second path from the current serving cell of the UE, and determining that a RACH preamble failure problem exists at the UE based at least on the comparing of the signals received on the downlink and identifying of successive RACH preamble failures. As such, improved performance uplink (UL) performance at a UE may be achieved.