Method and system for computing and sending resource requests and avoiding deadlock situations in mobile communication system

• US 9,210,642 B2
• Filed: 01/29/2010
• Issued: 12/08/2015
• Est. Priority Date: 01/29/2009
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Mallick, Prateek Basu, Shrivastava, Vinay Kumar
• Primary Examiner(s): Huq, Obaidul
• Application Number:
  US12/696,784
• Publication Number:
  US 20100189006A1
• Time in Patent Office: 2,139 Days
• Field of Search: 370/229, 370/230, 370/230.1, 370/231, 370/235, 370/241, 370/252, 370/464, 370/465, 370/470, 370/474, 370/310, 370/345, 370/349, 455/403, 455/422.1, 455/450, 455/452.1
• US Class Current: 1/1
• CPC Class Codes: H04L 69/04 Protocols for data compression, e.g. ROHC
• CPC Class Codes: H04W 28/0278 using buffer status reports dynamic wireless traffic scheduling definition H04W72/12
• CPC Class Codes: H04W 36/023 Buffering or recovering information during reselection
• CPC Class Codes: H04W 36/385 of the core network
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/52 based on load

Abstract

A method and system for requesting resources to send data packets in a mobile communication system is provided. The method includes calculating a size of a Robust Header Compression (ROHC) feedback packet associated with data packets available for transmitting, creating a Buffer Status Report (BSR) based on the number of data packets available for transmitting and the size of the ROHC feedback packet, sending the BSR to a first network element to allocate resources for the UE for sending the data packets available for transmitting along with ROHC feedback packet and identifying a size of a Packet Data Convergence Protocol (PDCP) status report when a handover procedure is performed. The BSR is estimated based on the size of the PDCP status report, the number of data packets available for transmitting and the size of the ROHC feedback packet.

Claims

1. A method for transmitting a buffer status report (BSR) by a user equipment (UE) performing a handover procedure from a first network element to a second network element in a mobile communication system, the method comprising:

identifying a data packet available for transmitting and packet data convergence protocol (PDCP) control information;

generating a BSR based on the data packet and the PDCP control information, the PDCP control information including robust header compression (ROHC) feedback information associated with the data packet available for transmitting and a PDCP status report indicating whether reception of a PDCP protocol data unit (PDU) is successful;

transmitting the generated BSR to the second network element,

wherein the PDCP status report is transmitted to the second network element based on the BSR as a first PDCP PDU after the UE performs the handover procedure.

2. The method of claim 1, wherein the data packet is at least one of service data units (SDUs) and PDUs.

3. The method of claim 1, wherein the first network element is an evolved node b (eNodeB).

4. The method of claim 1, wherein the mobile communication system is a long term evolution (LTE) system.

6. The UE of claim 2, wherein the data packet is at least one of service data units (SDUs) and PDUs.

7. The UE of claim 2, wherein the first network element is an evolved node b (eNodeB).

8. The UE of claim 2, wherein the mobile communication system is a long term evolution (LTE) system.

5. A user equipment (UE) for transmitting a buffer status report (BSR) performing a handover procedure from a first network element to a second network element in a mobile communication system, the UE comprising:

a processor for identifying a data packet available for transmitting and packet data convergence protocol (PDCP) control information, generating BSR based on the data packet and the PDCP control information, the PDCP control information including robust header compression (ROHC) feedback information associated with the data packet available for transmitting and a PDCP status report indicating whether reception of a PDCP protocol data unit (PDU) is successful, and transmitting the generated BSR to the second network element; and

a transceiver for transmitting the determined BSR to a first network element,

wherein the PDCP status report is transmitted to the second network element based on the BSR as a first PDCP PDU after the UE performs the handover procedure.