Smart Congestion Control for RRC Connected Mode in LTE Systems

• US 20150257161A1
• Filed: 03/05/2015
• Published: 09/10/2015
• Est. Priority Date: 03/06/2014
• Status: Active Grant

• Current Assignee: HFI Innovation, Inc. (MediaTek, Inc.)
• Original Assignee: MediaTek, Inc.
• Inventors: Hsu, Chia-Chun, Chou, Chie-Ming
• Granted Patent: US 9,538,540 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 65/00 Network arrangements, protocols or services for supporting real-time applications in data packet communication real-time or near real-time messaging, e.g. instant messaging [IM] H04L51/04; selective video distribution H04N21/00
• CPC Class Codes: H04L 65/80 Responding to QoS
• CPC Class Codes: H04W 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 48/02 Access restriction performed under specific conditions
• CPC Class Codes: H04W 72/52 based on load
• CPC Class Codes: H04W 80/04 Network layer protocols, e.g. mobile IP [Internet Protocol]

Abstract

A UE establishes an RRC connection with a base station for an application in a mobile communication network. The UE acquires a barring indication that indicates whether scheduling request (SR) barring is applicable for the application. The UE then acquires prioritized barring parameters for SR barring if applicable. The prioritized barring parameters is associated with a priority of the application. Finally, the UE determines whether to send a scheduling request for an arrived packet based on the prioritized barring parameters. In one embodiment, the application is associated with a quality of service (QoS) class indicator (QCI), and the priority of the application is based on the QCI. The prioritized SR barring mechanism based on QCI can be applied for RRC Connected mode with finer granularity.

Claims

1. A method comprising:

establishing a radio resource control (RRC) connection by a user equipment (UE) with a base station for an application in a mobile communication network;

acquiring a barring indication that indicates whether scheduling request (SR) barring is applicable for the application;

acquiring prioritized barring parameters for SR barring associated with a priority of the application if SR barring is applicable; and

determining whether to send a scheduling request for an arrived packet of the RRC connection based on the prioritized barring parameters.

2. The method of claim 1, wherein the application is associated with a quality class indicator (QCI), and wherein the priority of the application is based on the QCI.

3. The method of claim 1, wherein the application is associated with an allocation and retention priority (ARP), and wherein the priority of the application is based on the ARP.

4. The method of claim 1, wherein the prioritized barring parameters comprises a prioritized barring factor and a prioritized barring time.

5. The method of claim 4, wherein different applications with different priorities have different barring factors and barring times.

6. The method of claim 1, wherein the UE comprises a NAS layer and an RRC layer, wherein the RRC layer forwards the barring indication and the prioritized barring parameters to the NAS layer for determining SR barring.

7. The method of claim 1, wherein the UE also determines whether to send buffer status report (BSR) for the RRC connection based on the prioritized barring parameters.

8. A user equipment (UE), comprising:

a radio resource control (RRC) connection module that establishes an RRC connection with a base station for an application in a mobile communication network;

a receiver that receives a barring indication that indicates whether scheduling request (SR) barring is applicable for the application, wherein the receiver also receives prioritized barring parameters for SR barring associated with a priority of the application if SR barring is applicable; and

a prioritized access barring module that determines whether to send a scheduling request for an arrived packet of the RRC connection based on the prioritized barring parameters.

9. The UE of claim 8, wherein the application is associated with a quality class indicator (QCI), and wherein the priority of the application is based on the QCI.

10. The UE of claim 8, wherein the application is associated with an allocation and retention priority (ARP), and wherein the priority of the application is based on the ARP.

11. The UE of claim 8, wherein the prioritized barring parameters comprises a prioritized barring factor and a prioritized barring time.

12. The UE of claim 8, wherein different applications with different priorities have different barring factors and barring times.

13. The UE of claim 8, wherein the UE comprises a NAS layer and an RRC layer, wherein the RRC layer forwards the barring indication and the prioritized barring parameters to the NAS layer for determining SR barring.

14. The UE of claim 8, wherein the UE also determines whether to send buffer status report (BSR) for the RRC connection based on the prioritized barring parameters.

15. A method comprising:

establishing a radio resource control (RRC) connection by a base station with a user equipment (UE) for an application in a mobile communication network;

transmitting a barring indication that indicates whether scheduling request (SR) barring is applicable for the application;

transmitting prioritized barring parameters for SR barring associated with a priority of the application if SR barring is applicable; and

receiving a scheduling request for an arrived packet of the RRC connection from the UE based on the prioritized barring parameters.

16. The method of claim 15, wherein the application is associated with a quality class indicator (QCI), and wherein the priority of the application is based on the QCI.

17. The method of claim 15, wherein the application is associated with an allocation and retention priority (ARP), and wherein the priority of the application is based on the ARP.

18. The method of claim 15, wherein the prioritized barring parameters comprises a prioritized barring factor and a prioritized barring time.

19. The method of claim 18, wherein different applications with different priorities have different barring factors and barring times.

20. The method of claim 15, wherein the base station broadcasts the prioritized barring parameters via system information block (SIB).

21. The method of claim 15, wherein the barring parameters are independent from access control barring (ACB) parameters applied for RRC Idle mode.

22. The method of claim 15, wherein the barring parameters are the same as access control barring (ACB) parameters applied for RRC Idle mode.