Abstract:
【課題】UTRA(universal terrestrial radio access)R6(release6)セルとUTRA R7(release7)セル間のハンドオーバー手順の最適化を制御する。【解決手段】WTRUがR6セルとR7セルとの間、またはR7セルの間を移動する時、ハンドオーバーが、ソースノード−Bからターゲットノード−Bへと開始される。R7セルにおいて、フレキシブルRLC(radio link control)PDU(protocol data unit)サイズおよびMAC−hs(high speed MAC)セグメンテーションを含み、異なる優先待ち行列を多重化する強化MAC機能がサポートされる。ハンドオーバーの後、ターゲットノード−Bによってサポートされる機能に基づいてMACレイヤおよび/またはRLCレイヤが再構成またはリセットされる。【選択図】図2
Abstract:
PROBLEM TO BE SOLVED: To disclose a variety of wireless communication methods and apparatus for supporting reconfiguration of radio link control (RLC) parameters.SOLUTION: A radio resource control (RRC) reconfiguration message is generated that indicates that an RLC unit in a wireless transmit/receive unit (WTRU) or a universal terrestrial radio access network (UTRAN) should be reconfigured from supporting flexible size RLC protocol data units (PDUs) to supporting fixed size RLC PDUs. If an information element (IE) "one sided RLC re-establishment" is present in the RRC reconfiguration message, only a receiving side subassembly in the RLC unit is re-established. Otherwise, both the receiving side subassembly and a transmitting side subassembly in the RLC unit are re-established.
Abstract:
PROBLEM TO BE SOLVED: To provide a combined open loop/closed loop (channel quality indicator (CQI)-based) transmit power control (TPC) scheme with interference mitigation for a LTE wireless transmit/receive unit (WTRU).SOLUTION: A WTRU comprises: circuitry configured to receive a downlink control message, the message including uplink scheduling information including modulation and coding set (MCS) information and transmit power control (TPC) information; the circuitry further configured to measure path loss on the basis of a received signal; the circuitry further configured to determine a transmit power level for a physical uplink channel on the basis of the measured path loss, the TPC information, the MCS information, and a predetermined weighting factor; and the circuitry further configured to output a signal on the basis of the uplink scheduling information and the determined transmit power level for transmission on a physical uplink channel.
Abstract:
PROBLEM TO BE SOLVED: To provide a method and system for supporting next generation universal mobile telecommunication systems (UMTS) terrestrial radio access network (E-UTRAN).SOLUTION: A UTRAN sends to a multi-mode wireless transmit/receive unit (WTRU) a list of available radio access technologies in a coverage area of the UTRAN. The WTRU receives the list and may initiate a handoff on the basis of the list. The WTRU then sends its multi-mode/multi-RAT capability information including the E-UTRAN capability to the UTRAN. The UTRAN then sends a measurement capability message to the WTRU. The WTRU performs measurements on the basis of the measurement capability message and reports measurement results to the UTRAN. The UTRAN may initiate a handoff to an E-UTRAN on the basis of the measurement results.
Abstract:
PROBLEM TO BE SOLVED: To provide a method and system for optimizing power resources in wireless devices.SOLUTION: There is provided a device which returns to a sleep mode so as to conserve energy when no data is being sent thereto. All device destination identifiers (14) are organized and transmitted at a time. If a message listing (10) search indicates that no message is being sent for a device, the device may continue with any other activity that needs servicing, or if no other activity is pending, it may shut down to conserve power until the next wake-up period arrives. If the search returns a positive indication, the count value (12) when the identifier is found can be used to determine the location of a pointer (16) to the message.
Abstract:
PROBLEM TO BE SOLVED: To provide medium access control (MAC) layer architecture and functionality for supporting an enhanced uplink (EU).SOLUTION: A MAC entity for EU (i.e., MAC-e entity) (120, 220, 320) is incorporated in a wireless transmit/receive unit (WTRU) (100), a Node-B (200) and a radio network controller (RNC) (300). The MAC-e entity (120) in the WTRU handles hybrid-automatic repeat request (H-ARQ) transmissions and retransmissions, priority handling, MAC-e multiplexing, and transport format combination (TFC) selection. The MAC-e entity (220) in the Node-B handles H-ARQ transmissions and retransmissions, E-DCH (102) scheduling, and MAC-e demultiplexing. The MAC-e entity 320 (320) in the RNC provides in-sequence delivery and handles combining of data from different Node-Bs.
Abstract:
PROBLEM TO BE SOLVED: To provide multimedia broadcast/multicast services.SOLUTION: A wireless transmission/receiving unit (WTRU) receives cell information associated with target cell eNodeBs that neighbor a serving cell evolved Node-B (eNodeB), evaluates cell reselection criteria including priority to be given to an MBMS frequency which is currently received and/or is to be received through a single frequency network (MBSFN) to determine a neighboring target cell eNodeB to be reselected. The WTRU receives master information block (MIB) and system information messages of the target cell eNodeB, transmits a random access channel (RACH) preamble or RACH message, receives a RACH response, and receives the MBMS including the MBMS which has been received from the serving cell eNodeB, from the target cell eNodeB.
Abstract:
PROBLEM TO BE SOLVED: To measure a CQ at a proper timing and transmit information thereof to a base station arbitrarily.SOLUTION: In a method and system of measuring CQ (channel quality) for downlink resource allocation in a wireless digital communication system that can employ a CDMA technique, a UE (user equipment) 12 measures an RSCP (Received Signal Code Power) continuously based on communications on a reference channel provided by a network. The UE 12 measures a time slot ISCP (Interference Signal Code Power) continuously by a configuration or rotation, and notifies of a downlink CQ. The UE 12 may notify of the RSCP once and the ISCP every for a time slot, or alternatively may notify some functions of an RSCP/ISCP ratio such as a modulation parameter or a combined coding of all time slots.
Abstract:
PROBLEM TO BE SOLVED: To provide a method and system for enhanced basic service set (BSS) transition for high-throughput WLAN systems.SOLUTION: The WLAN includes at least one high throughput-enabled AP, at least one additional AP (high throughput-enabled or non-high throughput-enabled AP,) and at least one high throughput-enabled STA. An STA and a target AP communicate high throughput-related information, such as IEEE 802.11n capabilities or features, and the STA performs a BSS transition to the target AP on the basis of the communicated high throughput-related information. The high throughput-related information may be communicated directly between the STA and the target AP or via a current AP. The high throughput-related information may be included in an IEEE 802.11r, 802.11k, or 802.11v signaling message, or the like.
Abstract:
PROBLEM TO BE SOLVED: To provide a method and a device that reduce feedback overhead in wireless communication.SOLUTION: A wireless transmitting/receiving unit (WTRU) comprises a processor configured to determine first channel quality metrics for each first transmission layer of the N group of sub-bands in downlink bandwidth and second channel quality metrics for each second transmission layer of the N group of sub-bands in the downlink bandwidth. N is a positive integer larger than 1 and each group comprises a plurality of sub-bands in the downlink bandwidth. The processor transmits each of the first and second channel quality metrics of N pairs in a different report transmission time intervals (TTI).