Smart congestion control for RRC connected mode in LTE systems
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.
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 of the established RRC connection is applicable for the application in RRC connected mode;
acquiring prioritized barring parameters for SR barring associated with a priority of the application if SR barring is applicable, wherein the application is associated with an allocation and retention priority (ARP), and wherein the priority of the application is based on the ARP; and
determining whether to send a scheduling request for an arrived packet of the established RRC connection in RRC Connected mode 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 prioritized barring parameters comprises a prioritized barring factor and a prioritized barring time.
4. The method of claim 1 , wherein different applications with different priorities have different barring factors and barring times.
5. 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.
6. 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.
7. 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 of the established RRC connection is applicable for the application in RRC connected mode, wherein the receiver also receives prioritized barring parameters for SR barring associated with a priority of the application if SR barring is applicable, wherein the application is associated with an allocation and retention priority (ARP), and wherein the priority of the application is based on the ARP; and
a prioritized access barring module that determines whether to send a scheduling request for an arrived packet of the established RRC connection in RRC Connected mode based on the prioritized barring parameters.
8. The UE of claim 7 , wherein the application is associated with a quality class indicator (QCI), and wherein the priority of the application is based on the QCI.
9. The UE of claim 7 , wherein the prioritized barring parameters comprises a prioritized barring factor and a prioritized barring time.
10. The UE of claim 7 , wherein different applications with different priorities have different barring factors and barring times.
11. The UE of claim 7 , 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.
12. The UE of claim 7 , wherein the UE also determines whether to send buffer status report (BSR) for the RRC connection based on the prioritized barring parameters.
13. 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 of the established RRC connection is applicable for the application;
transmitting prioritized barring parameters for SR barring associated with a priority of the application if SR barring is applicable, wherein the application is associated with an allocation and retention priority (ARP), and wherein the priority of the application is based on the ARP; and
receiving a scheduling request for an arrived packet of the established RRC connection from the UE in RRC connected mode based on the prioritized barring parameters.
14. The method of claim 13 , wherein the application is associated with a quality class indicator (QCI), and wherein the priority of the application is based on the QCI.
15. The method of claim 13 , wherein the prioritized barring parameters comprises a prioritized barring factor and a prioritized barring time.
16. The method of claim 15 , wherein different applications with different priorities have different barring factors and barring times.
17. The method of claim 13 , wherein the base station broadcasts the prioritized barring parameters via system information block (SIB).
18. The method of claim 13 , wherein the barring parameters are independent from access control barring (ACB) parameters applied for RRC Idle mode.
19. The method of claim 13 , wherein the barring parameters are the same as access control barring (ACB) parameters applied for RRC Idle mode.