RRC connection release method, apparatus, and device

• US 10,694,576 B2
• Filed: 06/22/2018
• Issued: 06/23/2020
• Est. Priority Date: 12/23/2015
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Yan, Le, Dai, Mingzeng, Huang, Min, Zhang, Hongping, Guo, Yi, Zeng, Qinghai
• Primary Examiner(s): Shah, Saumit
• Application Number:
  US16/015,867
• Publication Number:
  US 20180302947A1
• Time in Patent Office: 732 Days
• Field of Search: None
• CPC Class Codes: H04L 47/28 in relation to timing considerations
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04W 28/02 Traffic management, e.g. flow control or congestion control
• CPC Class Codes: H04W 28/0278 using buffer status reports dynamic wireless traffic scheduling definition H04W72/12
• CPC Class Codes: H04W 76/27 Transitions between radio resource control [RRC] states
• CPC Class Codes: H04W 76/30 Connection release
• CPC Class Codes: H04W 76/38 triggered by timers
• CPC Class Codes: H04W 88/02 Terminal devices

Abstract

A radio release control (RRC) connection release method includes: sending, by user equipment (UE), a first message to a base station, where the first message carries a preset RRC release time determining parameter or a first RRC release time; if the UE adds the first RRC release time to the first message, setting, by the UE, timing duration of a first timer based on the first RRC release time, and starting the first timer; and releasing, by the UE, an RRC connection when the first timer expires.

Claims

1. A radio resource control (RRC) connection release method, comprising:

sending, by user equipment (UE), a first message to a base station, wherein the first message carries a preset RRC release time determining parameter or a first RRC release time;

when the UE adds the first RRC release time to the first message, setting, by the UE, timing duration of a first timer based on the first RRC release time, and starting the first timer; and

when the UE adds the preset RRC release time determining parameter to the first message, receiving, by the UE, a response message fed back by the base station for the first message, wherein the response message carries a second RRC release time determined by the base station based on the preset RRC release time determining parameter, setting, by the UE, timing duration of the first timer based on the second RRC release time, and starting the first timer;

reporting, by the UE, a buffer status report (BSR) to the base station for instructing the base station to adjust a timing duration of a second timer;

receiving, by the UE, a first adjustment instruction returned by the base station, and adjusting the timing duration of the first timer based on the first adjustment instruction; and

releasing, by the UE, an RRC connection when the first timer expires.

2. The method according to claim 1, wherein the preset RRC release time determining parameter is a volume of to-be-sent uplink data of the UE and/or an estimated time of sending the to-be-sent uplink data.

3. The method according to claim 1,

wherein setting the timing duration of the second timer is set by the base station based on the first message sent by the UE.

4. A radio resource control (RRC) connection release method, comprising:

receiving, by a base station, a first message sent by user equipment (UE), wherein the first message carries a preset RRC release time determining parameter or a first RRC release time;

in response to determining that the first message carries the first RRC release time, setting, by the base station, timing duration of a second timer based on the first RRC release time, and starting the second timer;

in response to determining that the first message carries the preset RRC release time determining parameter, determining, by the base station, a second RRC release time based on the preset RRC release time determining parameter, adding the second RRC release time to a response message fed back to the UE for the first message, setting, by the base station, timing duration of the second timer based on the second RRC release time, and starting the second timer;

receiving, by the base station, a buffer status report (BSR) reported by the UE;

adjusting, by the base station, the timing duration of the second timer based on the BSR;

generating, by the base station, a first adjustment instruction and a second adjustment instruction based on a result of adjusting the timing duration of the second timer and returning the first adjustment instruction to the UE; and

releasing, by the base station, an RRC connection between the base station and the UE when the second timer expires.

5. The method according to claim 4, wherein the preset RRC release time determining parameter is a volume of to-be-sent uplink data of the UE and/or an estimated time of sending the to-be-sent uplink data.

6. The method according to claim 4, wherein the method further comprises:

notifying a mobility management entity (MME) of the second adjustment instruction.

7. The method according to claim 4, wherein after the base station feeds back the response message to the UE, the method further comprises:

after receiving an acknowledgement message sent by the UE for the response message, sending, by the base station, S1 connection resume indication information to a mobility management entity (MME), wherein the S1 connection resume indication information carries the timing duration of the second timer;

receiving, by the base station, S1 connection resume confirmation indication information sent by the MME; and

determining, by the base station based on the S1 connection resume confirmation indication information, that an S1 connection between the base station and the MME is resumed.

8. A radio resource control (RRC) connection release apparatus, comprising:

a transmitter configured to send a first message to a base station, wherein the first message carries a preset RRC release time determining parameter or a first RRC release time and to report a buffer status report (BSR) to the base station for instructing the base station to adjust timing duration of a second timer;

a processor configured to;

when the first message carries the first RRC release time, set timing duration of a first timer based on the first RRC release time, and start the first timer, and

when the first message carries the preset RRC release time determining parameter, set timing duration of the first timer based on a second RRC release time, and start the first timer;

a receiver configured to;

when the first message carries the preset RRC release time determining parameter, receive a response message fed back by the base station for the first message, wherein the response message carries the second RRC release time determined by the base station based on the preset RRC release time determining parameter and to receive a first adjustment instruction returned by the base station;

wherein the processor is further configured to, when the first adjustment instruction returned by the base station is received, adjust the timing duration of the first timer based on the first adjustment instruction; and

wherein the processor is further configured to release an RRC connection when the first timer expires.

9. The apparatus according to claim 8, wherein the preset RRC release time determining parameter is a volume of to-be-sent uplink data of the apparatus and/or an estimated time of sending the to-be-sent uplink data.

10. The apparatus according to claim 8, wherein:

the timing duration of the second timer is set by the base station based on the first message sent by the UE.

11. A radio release control (RRC) connection release apparatus, comprising:

a receiver configured to receive a first message sent by user equipment (UE), wherein the first message carries a preset RRC release time determining parameter or a first RRC release time, and to receive a buffer status report (BSR) reported by the UE;

a processor configured to;

when the first message carries the first RRC release time, set timing duration of a second timer based on the first RRC release time, and start the second timer, and

when the first message carries the preset RRC release time determining parameter, determine a second RRC release time based on the preset RRC release time determining parameter, set timing duration of the second timer based on the second RRC release time, and start the second timer;

a transmitter configured to;

when the first message carries the preset RRC release time determining parameter, feed back a response message to the UE for the first message, wherein the response message carries the second RRC release time; and

wherein the processor is further configured to, when the BSR reported by the UE is received, adjust the timing duration of the second timer, and generate a first adjustment instruction and a second adjustment instruction based on a result of adjusting the timing duration of the second timer, and release an RRC connection between the RRC connection release apparatus and the UE when the second timer expires and to cause the transmitter to return the first adjustment instruction to the UE.

12. The apparatus according to claim 11, wherein the preset RRC release time determining parameter is a volume of to-be-sent uplink data of the UE and/or an estimated time of sending the to-be-sent uplink data.

13. The apparatus according to claim 11, wherein:

the transmitter is further configured to;

notify a mobility management entity (MME) of the second adjustment instruction.

14. The apparatus according to claim 11, wherein:

the receiver is further configured to receive an acknowledgement message sent by the UE for the response message;

the transmitter is further configured to;

after the receiver receives the acknowledgement message sent by the UE for the response message, send S1 connection resume indication information to a mobility management entity (MME), wherein the S1 connection resume indication information carries the timing duration of the second timer;

the receiver is further configured to receive S1 connection resume confirmation indication information sent by the MME; and

the processor is further configured to determine, based on the S1 connection resume confirmation indication information, that an S1 connection between the base station and the MME is resumed.