Abstract:
PROBLEM TO BE SOLVED: To provide techniques to support operation of user equipment (UE) in a compressed mode and a CPC mode.SOLUTION: The UE obtains assignment of enabled subframes for the CPC mode and assignment of transmission gaps for the compressed mode. The transmission gaps are aligned with idle times between the enabled subframes. The UE exchanges data during enabled subframes not overlapping the transmission gaps and skips data exchanges during enabled subframes overlapping the transmission gaps. The UE makes cell measurement during the transmission gaps. The UE obtains enabled subframes and skipped subframes, exchanges data during enabled subframes not corresponding to the skipped subframes, and skips data exchanges during the skipped subframes. The UE receives orders on a shared control channel to quickly enable and disable the compressed mode.
Abstract:
PROBLEM TO BE SOLVED: To provide techniques for performing handover in order to maintain call continuity for user equipment (UE).SOLUTION: The UE communicates with a first cell in a radio access network (RAN) for a packet-switched (PS) call, e.g., for Voice-over-Internet Protocol (VoIP) via High-Speed Packet Access in W-CDMA. The UE sends measurement reports to the RAN and receives trigger from the RAN. The UE establishes a circuit-switched (CS) call with the first cell while the PS call is pending at the first cell. The UE then performs handover of the CS call from the first cell to a second cell, which may not support VoIP.
Abstract:
PROBLEM TO BE SOLVED: To transmit and receive data in an efficient manner to potentially improve capacity for a wireless network, and to achieve power savings for a wireless device. SOLUTION: A continuous packet connectivity (CPC) mode is utilized, which is comprised of multiple discontinuous transmission (DTX) modes and at least one discontinuous reception (DRX) mode. Each DTX mode is associated with different enabled uplink subframes usable for transmission from a wireless device to a network. Each DRX mode is associated with different enabled downlink subframes usable by the network for transmission to the wireless device. The wireless device may power down during non-enabled subframes so as to conserve battery power and quickly perform transitions between the DTX and the DRX modes. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To reduce interruption in content distribution when user equipment (UE) moves from one cell to the other, or when the distribution of a content is changed from Point-to-Point (PTP) connection to Point-to-Multipoint (PTM) connection in the same service cell by improving the continuity of service. SOLUTION: A service data unit (SDU) is segmented to any row of a coding matrix, and an external header including a sequence number is added to each row of a coded coder packet for formatting to a composite code block for transmission. A reception unit having received the composite code block performs the overlapping detection and re-sequencing of a block by the sequence number, and then removes the sequence number to decode an information row for reconstruction. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method and apparatus for matching revision levels used by a mobile station and a base station for establishing a communication link.SOLUTION: In a communication system 100, an updated mobile station, such as mobile stations 102 to 104, starts establishing a communication call with a base station, such as base stations 101 and 160, in accordance with the protocol of a release with the updated standard. The mobile station repeats, for a number of times, the transmission of a request for establishing a communication link between the mobile station and the base station. The mobile station detects failure of establishing the communication link with the first revision level based on repeating the request for the number of times. The mobile station changes the first revision level to the second revision level at the mobile station for establishing the communication link.
Abstract:
A system and method for providing high performance dispatch services for a push-to-talk (PTT) communication over a wireless communication network. When a wireless device is powered up, it registers with a server and then transitions to a paging state instead of an idle state. When the wireless device is ready to transmit PTT communications, it sends a message to the server and transitions to a transmission state when a confirmation is received from the server. Once in the transmission state, the wireless device is ready to transmit the PTT communications to the server.
Abstract:
Techniques for performing handover in order to maintain call continuity for a user equipment (UE) are described. The UE may communicate with a first cell in a radio access network (RAN) for a packet-switched (PS) call, e.g., for Voice-over-Internet Protocol (VoIP) via High-Speed Packet Access (HSPA) in W-CDMA. The UE may send measurement reports to the RAN and may receive trigger from the RAN. The UE may establish a circuit-switched (CS) call with the first cell while the PS call is pending at the first cell. The PS call and the CS call may be for a voice call, and the UE may switch data path for the voice call from the PS call to the CS call and then terminate the PS call. The UE may then perform handover of the CS call from the first cell to a second cell, which may not support VoIP.
Abstract:
Techniques for quickly and efficiently performing handover are described. A user equipment (UE) may maintain a link with a serving cell and may communicate with this cell via the established link. The UE may have a candidate set of non-serving cells that are candidates for handover. The UE may maintain uplink synchronization with one or more non-serving cells in the candidate set, without having to maintain links with any of the non-serving cells. The UE may update uplink synchronization with the non-serving cells via an access procedure, e.g., send access probes to the non-serving cells and receive timing adjustments from these cells. One non-serving cell with which the UE has maintained uplink synchronization may be selected as a target cell for handover. The UE may then perform handover from the serving cell to the target cell, without performing uplink synchronization during the handover, which may improve handover latency and success rate.
Abstract:
A system and method for providing high performance dispatch services for a push-to-talk (PTT) communication over a wireless communication network. When a wireless device is powered up, it registers with a server and then transitions to a paging state instead of an idle state. When the wireless device is ready to transmit PTT communications, it sends a message to the server and transitions to a transmission state when a confirmation is received from the server. Once in the transmission state, the wireless device is ready to transmit the PTT communications to the server.
Abstract:
A method and apparatus for a communication system provide for fast link setup for a mobile station by transmitting a request message, transmitting an assignment message from the base station to the mobile station, and transmitting a notification message from the base station to a base station controller. The mobile station transmits an indication message to the base station controller indicating a successful completion of acquiring the data packet channel. The base station controller processes the indication message for message integrity and security feature. A portion of the available communication resources at the base station is allocated for an immediate response to the request message for acquiring a data packet channel.