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

Patent metadata

Field	Value
Publication number	US-2018317123-A1
Application number	US-201815963313-A
Country	US
Kind code	A1
Filing date	Apr 26, 2018
Priority date	Apr 26, 2017
Publication date	Nov 1, 2018
Grant date	—

Abstract

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.

First claim

1 . A method of a UE (User Equipment), wherein the UE is allocated with multiple SR (Scheduling Request) configurations by a network node, comprising:
triggering a MAC (Medium Access Control) control element if a timer expires; triggering a SR for the MAC control element; and 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.

2 . The method of claim 1 , wherein the timer is a retxBSR-Timer.

3 . The method of claim 1 , wherein the MAC control element is a BSR (Buffer Status Report).

4 . The method of claim 1 , wherein the first SR configuration is associated with the highest priority logical channel based on an identity of the highest priority logical channel.

5 . The method of claim 1 , further comprising:
triggering the MAC control element if the UE has data for any logical channels that belong to a Logical Channel Group.

6 . A method of a UE (User Equipment), comprising:
receiving multiple SR (Scheduling Request) configurations from a network node; triggering a first MAC (Medium Access Control) control element; triggering a first SR for the first MAC (Medium Access Control) control element; and transmitting the first SR to the network node according to a first SR configuration of the multiple SR configurations, wherein the first SR configuration is selected based on a characteristic of the first SR configuration.

7 . The method of claim 6 , wherein the characteristic is the first SR configuration has the closest SR transmission opportunity after the first MAC control element is triggered.

8 . The method of claim 6 , further comprising:
triggering a second MAC control element for an uplink data of a first logical channel; triggering a second SR for the second MAC control element; and transmitting the second SR to the network node according to a second SR configuration of the multiple SR configurations, wherein the second SR configuration is selected based on an association between the first logical channel and the second SR configuration.

9 . The method of claim 8 , further comprising:
the UE performs the second SR transmission according to the second SR configuration without suspending or stopping performing a third SR transmission according to the first SR configuration.

10 . The method of claim 8 , further comprising:
the UE stops performing a third SR transmission according to the first SR configuration when the UE triggers the second MAC control element.

11 . The method of claim 6 , wherein the first MAC control element is a sidelink BSR (Buffer Status Report).

12 . The method of claim 6 , wherein the first MAC control element is triggered due to a timer expiry.

13 . The method of claim 12 , wherein the timer is a retxBSR-Timer.

14 . The method of claim 6 , wherein the first MAC control element is a Buffer Status Report.

15 . The method of claim 12 , further comprising:
triggering the first MAC control element if the UE has data for any logical channels that belong to a Logical Channel Group (LCG).

16 . A User Equipment (UE), comprising:
a control circuit; a processor installed in the control circuit; and a memory installed in the control circuit and operatively coupled to the processor; wherein the processor is configured to execute a program code stored in the memory to:
trigger a MAC (Medium Access Control) control element if a timer expires;
trigger a SR for the MAC control element; and
transmit 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.

17 . The UE of claim 16 , wherein the timer is a retxBSR-Timer.

18 . The UE of claim 16 , wherein the MAC control element is a BSR (Buffer Status Report).

19 . The UE of claim 16 , wherein the first SR configuration is associated with the highest priority logical channel based on an identity of the highest priority logical channel.

20 . The UE of claim 16 , wherein the processor is further configured to execute a program code stored in the memory to:
trigger the MAC control element is triggered if the UE has data for any of logical channels which belong to a Logical Channel Group.

Assignees

• Asustek Comp Inc

Inventors

• Chen Wei-Yu
• Kuo Richard Lee-Chee
• Tseng Li-Chih

Classifications

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04W72/56

  based on priority criteria · CPC title

• H04W72/20

  Control channels or signalling for resource management · CPC title

• H04W72/23 Primary

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W72/566

  of the information or information source or recipient · CPC title