Method and apparatus for layer 2 ARQ for packets

• US 9,049,718 B2
• Filed: 12/12/2012
• Issued: 06/02/2015
• Est. Priority Date: 05/09/2007
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Soeng-Hun, Van Lieshout, Gert Jan, Van Der Velde, Himke
• Primary Examiner(s): Pham, Chi H
• Assistant Examiner(s): HYUN, SOON D
• Application Number:
  US13/712,341
• Publication Number:
  US 20130100939A1
• Time in Patent Office: 902 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04L 1/1685 the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/1858 Transmission or retransmission of more than one copy of acknowledgement message
• CPC Class Codes: H04L 1/1883 using multiple timers
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 72/044 based on the type of the allocated resource
• CPC Class Codes: H04W 80/02 Data link layer protocols
• CPC Class Codes: H04W 80/06 Transport layer protocols, e.g. TCP [Transport Control Protocol] over wireless transmission control protocol/Internet protocol [TCP/IP] or user datagram protocol [UDP] H04L69/16

Abstract

A method and a transmitter are provided for performing packet ARQ in a communication system. A first RLC PDU is generated. The first RLC PDU includes polling information having a predetermined bit, when there is no subsequent RLC PDU transmission after transmission of the first RLC PDU. A timer is started or restarted when the first RLC PDU is transmitted to a receiver. The polling information having a predetermined bit is transmitted when the timer expires.

Claims

1. A method for transmitting data by a transmitting apparatus in a communication system, the method comprising:

generating, by the transmitting apparatus, a radio link control (RLC) packet data unit (PDU) including first polling information, if the RLC PDU is a last RLC PDU;

transmitting the RLC PDU from the transmitting apparatus to a receiving apparatus;

generating, by the transmitting apparatus, a segmented RLC PDU; and

transmitting the segmented RLC PDU, from the transmitting apparatus, to a receiving apparatus,

wherein the RLC PDU is segmented if an amount of available resources is less than an amount of resources required for retransmitting the RLC PDU, and

wherein the segmented RLC PDU includes second Dolling information if the segmented RLC PDU is a last segmented RLC PDU.

2. The method of claim 1, wherein the first polling information and the second polling information are different.

3. The method of claim 1, further comprising:

starting a polling timer after transmitting the last segmented RLC PDU; and

retransmitting the second polling information included in the last segmented RLC PDU, if a reception status report corresponding to the second polling is not received by a time at which the polling timer expires.

4. The method of claim 1, wherein the RLC PDU is the last RLC PDU, if there is no subsequent RLC PDU transmission after transmission of the RLC PDU.

5. The method of claim 1, wherein the last segmented RLC PDU has no subsequent segmented RLC PDU transmission after transmission of the last segmented RLC PDU.

6. An apparatus for transmitting data in a communication system, the apparatus comprising:

a controller configured to generate a radio link control (RLC) packet data unit (PDU) including first polling information, if the RLC PDU is a last RLC PDU, and generate a segmented RLC PDU; and

transmitter configured to transmit the RLC PDU and the segmented RLC PDU to at least one receiving apparatus,

wherein the RLC PDU is segmented if an amount of available resources is less than an amount of resources required for retransmitting the RLC PDU, and

wherein the segmented RLC PDU includes second polling information if the segmented RLC PDU is a last segmented RLC PDU.

7. The apparatus of claim 6, wherein the first polling information and the second polling information are different.

8. The apparatus of claim 6, wherein the controller is further configured to start a polling timer after transmitting the last segmented RLC PDU, and retransmit the second polling information included in the last segmented RLC PDU, if a reception status report corresponding to the second polling information is not received by a time at which the polling timer expires.

9. The apparatus of claim 6, wherein the RLC PDU is the last RLC PDU, if there is no subsequent RLC PDU transmission after transmission of the RLC PDU.

10. The apparatus of claim 6, wherein the last segmented RLC PDU has no subsequent segmented RLC PDU transmission after transmission of the last segmented RLC PDU.

11. A method for transmitting data by a transmitting apparatus in a communication system, the method comprising:

segmenting, by the transmitting apparatus, a radio link control (RLC) packet data unit (PDU) to generate a segmented RLC PDU;

including, by the transmitting apparatus, first polling information in the segmented RLC PDU if the segmented RLC PDU is a last segmented RLC PDU; and

transmitting the segmented RLC PDU, from the transmitting apparatus, to a receiving apparatus.

12. The method of claim 11, wherein the RLC PDU is segmented, if an amount of available resources is less than an amount of resources required for retransmitting the RLC PDU.

13. The method of claim 12, wherein the RLC PDU includes second polling information, if the RLC PDU is a last RLC PDU to be transmitted.

14. The method of claim 13, wherein the second polling information and the first polling information are different.

15. The method of claim 13, wherein the RLC PDU is the last RLC PDU, if there is no subsequent RLC PDU transmission after transmission of the RLC PDU.

16. The method of claim 11, wherein the last segmented RLC PDU has no subsequent segmented RLC PDU transmission after transmission of the last segmented RLC PDU.

17. An apparatus for transmitting data in a communication system, the apparatus comprising:

a controller configured to segment radio link control (RLC) packet data unit (PDU) for generation of a segmented RLC PDU, and include first polling information in the segmented RLC PDU if the segmented RLC PDU is a last segmented RLC PDU; and

a transmitter configured to transmit the segmented RLC PDU to a receiving apparatus.

18. The apparatus of claim 17, wherein the RLC PDU is segmented, if an amount of available resources is less than an amount of resources required for retransmitting the RLC PDU.

19. The apparatus of claim 18, wherein the RLC PDU includes second polling information, if the RLC PDU is a last RLC PDU to be transmitted.

20. The apparatus of claim 19, wherein the second polling information and the first polling information are different.

21. The apparatus of claim 19, wherein the RLC PDU is the last RLC PDU, if there is no subsequent RLC PDU transmission after transmission of the RLC PDU.

22. The apparatus of claim 17, wherein the last segmented RLC PDU has no subsequent segmented RLC PDU transmission after transmission of the last segmented RLC PDU.

23. An apparatus for transmitting data in a communication system, the apparatus comprising:

a memory; and

at least one processor coupled to memory and operative to;

(i) generate a radio link control (RLC) packet data unit (PDU) including first polling information, if the RLC PDU is a last RLC PDU;

(ii) transmit the RLC PDU to a receiving apparatus;

(iii) generate a segmented RLC PDU; and

(iv) transmit the segmented RLC PDU to a receiving apparatus,

wherein the RLC PDU is segmented if an amount of available resources is less than an amount of resources required for retransmitting the RLC PDU, and

wherein the segmented RLC PDU includes second polling information if the segmented RLC PDU is a last segmented RLC PDU.

24. An article of manufacture for transmitting data in a communication system, comprising a non-transitory machine readable medium containing one or more programs which when executed implement the steps of:

generating a radio link control (RLC) packet data unit (PDU) including first polling information, if the RLC PDU is a last RLC PDU;

transmitting the RLC PDU to a receiving apparatus;

generating a segmented RLC PDU; and

transmitting the segmented RLC PDU to a receiving apparatus,

wherein the RLC PDU is segmented if an amount of available resources is less than an amount of resources required for retransmitting the RLC PDU, and

wherein the segmented RLC PDU includes second polling information if the segmented RLC PDU is a last segmented RLC PDU.