System and method for avoiding stall using timer for high-speed downlink packet access system

• US 8,050,178 B2
• Filed: 04/17/2008
• Issued: 11/01/2011
• Est. Priority Date: 01/05/2002
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Yi, Seung June, Lee, So Young, Yeo, Woon Young
• Primary Examiner(s): Ngo; Ricky
• Assistant Examiner(s): Zaidi; Iqbal
• Application Number:
  US12/104,542
• Publication Number:
  US 20080212588A1
• Time in Patent Office: 1,293 Days
• Field of Search: 370200-253, 370272-309, 370431-546
• US Class Current: 370/235
• CPC Class Codes: H04B 7/0604 with predefined switching scheme
• CPC Class Codes: H04B 7/15507 Relay station based processing for cell extension or control of coverage area, network planning with network coordinated processing with regard to cell extension H04W16/26; network topologies using dedicated repeater stations H04W84/047; terminal devices adapted for relaying to or from an other terminal H04W88/04
• CPC Class Codes: H04B 7/15535 Control of relay amplifier gain amplifier gain control in general H03G3/00; gain control reducing self - or loop interference H04B7/15578
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04L 1/06 using space diversity
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04L 1/1841 Resequencing
• CPC Class Codes: H04L 1/1845 Combining techniques, e.g. code combining
• CPC Class Codes: H04L 1/1848 Time-out mechanisms
• CPC Class Codes: H04L 2001/0096 Channel splitting in point-to-point links
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/28 in relation to timing considerations
• CPC Class Codes: H04L 47/34 ensuring sequence integrity, e.g. using sequence numbers
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0042 intra-user or intra-terminal allocation
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0083 symbol-by-symbol
• CPC Class Codes: H04L 69/28 Timers or timing mechanisms used in protocols
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 28/02 Traffic management, e.g. flow control or congestion control
• CPC Class Codes: H04W 28/14 : using intermediate storage
• CPC Class Codes: H04W 52/143 : Downlink power control
• CPC Class Codes: H04W 52/225 : Calculation of statistics, e.g. average, variance
• CPC Class Codes: H04W 52/24 : using SIR [Signal to Interference Ratio] or other wireless path parameters
• CPC Class Codes: H04W 52/241 : taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
• CPC Class Codes: H04W 52/242 : taking into account path loss
• CPC Class Codes: H04W 52/245 : taking into account received signal strength
• CPC Class Codes: H04W 52/46 : in multi hop networks, e.g. wireless relay networks
• CPC Class Codes: H04W 8/04 : Registration at HLR or HSS [Home Subscriber Server]

Abstract

At least one timer is used to prevent a stall condition. If a timer is not active, the timer is started for a data block that is correctly received. The data block has a sequence number higher than a sequence number of another data block that was first expected to be received. When the timer is stopped or expires, all correctly received data blocks among data blocks up to and including a data block having a sequence number that is immediately before the sequence number of the data block for which the timer was started is delivered to a higher layer. Further, all correctly received data blocks up to a first missing data block, including the data block for which the timer was started, is delivered to the higher layer.

Claims

1. A method for processing a data block in a receiver of a mobile communication system, the method comprising:

receiving a data block having sequence number N;

if at least one of data blocks having a sequence number lower than the sequence number N has not been received, storing the received data block having sequence number N in a buffer;

starting a timer for the data block having sequence number N; and

delivering correctly received data blocks stored in the buffer to an upper layer,

wherein delivering comprises delivering a data block having next expected sequence number before the timer expires when said data block having next expected sequence number is received and delivering correctly received data blocks stored in the buffer up to and including the data block with the sequence number N when the timer expires, or delivering a data block having next expected sequence number before the timer expires when said data block having next expected sequence number is received and delivering correctly received data blocks stored in the buffer up to and including the data block with the sequence number N when the at least one of data blocks, which has a sequence number lower than the sequence number N and has not been received, is received even before the timer expires.

2. The method of claim 1, wherein delivering the correctly received data blocks comprises delivering correctly received data blocks stored in the buffer up to and including the data block with the sequence number N when all the data blocks having a lower sequence number than the sequence number N have been received before the timer expires.

3. The method of claim 1, wherein delivering the correctly received data blocks comprises delivering all data blocks stored in the buffer that consecutively follows said data block having the sequence number N up to the first missing data block when the timer expires.

7. The method of claim 1 further comprising re-starting the timer for a data block with a highest sequence number among received data blocks that cannot be delivered to the upper layer.

4. A mobile communication terminal configured to process data block, the mobile communication terminal comprising:

a receiver for receiving data blocks with sequence numbers;

at least one buffer;

at least one timer; and

an uplink interface to deliver data to an upper layer of said terminal,

wherein the terminal is configured for, after receiving a data block having a sequence number N;

if at least one data block having a sequence number lower than the sequence number N has not been received, storing the received data block having a sequence number N;

starting a timer for the data block having sequence number N; and

delivering correctly received data blocks stored in the buffer to an upper layer,

wherein delivering comprises delivering a data block having next expected sequence number before the timer expires when said data block having next expected sequence number is received and delivering correctly received data blocks stored in the buffer up to and including the data block with the sequence number N when the timer expires, or delivering a data block having next expected sequence number before the timer expires when said data block having next expected sequence number is received and delivering correctly received data blocks stored in the buffer up to and including the data block with the sequence number N when the at least one of data blocks, which has a sequence number lower than the sequence number N and has not been received, is received even before the timer expires.

5. The terminal of claim 4, further configured for delivering correctly received data blocks stored in the buffer up to and including the data block with the sequence number N when all the data blocks having a lower sequence number than the sequence number N have been received before the timer expires.

6. The terminal of claim 4, further configured for delivering all data blocks stored in the buffer that consecutively follows said data block having the sequence number N up to the first missing data block when the timer expires.

8. The terminal of claim 4, wherein the timer is re-started for a data block with a highest sequence number among received data blocks that cannot be delivered to the upper layer.