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Method and apparatus for requesting resource for control element transmission in a wireless communication system

專(zhuān)利號(hào)
US11159979B2
公開(kāi)日期
2021-10-26
申請(qǐng)人
ASUSTek Computer Inc.（TW Taipei）
發(fā)明人
Wei-Yu Chen; Richard Lee-Chee Kuo; Li-Chih Tseng
IPC分類(lèi)
H04W28/02; H04W72/04; H04W72/12; H04W72/08; H04L5/00; H04L12/835; H04W72/10
技術(shù)領(lǐng)域
sr,ue,numerology,bsr,mac,sidelink,tti,uplink,channel,control
地域： Taipei

摘要

A method and apparatus are disclosed from the perspective of a UE, wherein the UE is allocated with multiple SR configurations by a network node. In one embodiment, the method includes the UE triggering a MAC control element if a timer expires. The method also includes the UE triggering a SR for the MAC control element. The method also includes the UE transmitting the SR based on a first SR configuration of the multiple SR configurations, wherein the first SR configuration is associated with a highest priority logical channel having data available for transmission when the MAC control element is triggered.

說(shuō)明書(shū)

  • 2. From RAN2 point of view a single bit SR with multiple SR configuration is sufficient to distinguish the “numerology/TTI length” of the logical channel that trigger the SR. RAN2 has not identified other use cases for which multibit SR is need with sufficient support.
  • 3. RAN2 does not see the need to convey buffer status information.
  • 4. Send LS to RAN1 to indicate to RAN1 that RAN2 doesn't see the need to support multibit SR.

    • Based on the latest agreement, a SR will need to reflect TTI and/or numerology information of the uplink logical channel which triggers the SR. The main purpose of such agreement is to accelerate uplink resource request and to avoid resource waste caused by TTI/numerology configuration of logical channels. How to reflect TTI and/or numerology information will need further study. Potential methods are discussed below.

    Method 1—Network provides multiple SR configurations to UE. Different SR configurations may contain different radio resources in frequency domain, time domain, and/or code domain and each SR configuration is linked to TTI/numerology information. The linking could be established based on implicit association (e.g., a numerology used for SR transmission according to a SR configuration is linked to requesting the resource on the numerology) and/or explicit association (e.g., TTI/numerology information is included in each SR configuration). The TTI/numerology information could be one or multiple following candidates:

    • 1. Numerology (e.g. numerology index)
    • 2. TTI length/duration (e.g. maximum TTI threshold, specific TTI length/duration (range))
    • 3. Logical channel identity

    權(quán)利要求

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