Method and apparatus for layer 2 ARQ for packets

• US 9,674,832 B2
• Filed: 06/02/2015
• Issued: 06/06/2017
• 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:
  US14/728,376
• Publication Number:
  US 20150264675A1
• Time in Patent Office: 735 Days
• Field of Search: None
• 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 an apparatus are provided for transmitting data by a transmitting apparatus in a communication system. The transmitting apparatus segments a radio link control (RLC) packet data unit (PDU), if an amount of available resources is less than an amount of resources required for retransmitting the RLC PDU. The transmitting apparatus includes polling information in the segmented RLC PDU, if the segmented RLC PDU is a last segmented RLC PDU. The transmitting apparatus transmits the segmented RLC PDU to a receiving apparatus.

Claims

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

transmitting, to a receiving apparatus, a data unit, wherein, if the data unit is a last data unit to be transmitted, the data unit comprises first polling information;

receiving, from a receiving apparatus, a NACK signal corresponding to the data unit;

segmenting the data unit into a plurality of segments, if an amount of available resources is less than an amount of resources required for retransmitting the data unit; and

transmitting, to the receiving apparatus, a segment among the plurality of segments, wherein, if the segment is a last segment to be transmitted, the segment comprises second polling information.

2. The method of claim 1, wherein the first polling information indicates to request the receiving apparatus to transmit a status report.

3. The method of claim 1, wherein the second polling information indicates to request the receiving apparatus to transmit a status report.

4. The method of claim 3, wherein the first polling information is different from the second polling information.

5. The method of claim 3, further comprising:

starting a timer after transmitting of the data unit comprising the first polling information; and

if the NACK signal corresponding to the data unit is not received until expiry of the timer, retransmitting the data unit comprising the first polling information.

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

a transceiver configured to transmit, to a receiving apparatus, a data unit, wherein, if the data unit is a last data unit to be transmitted, the data unit comprises first polling information, and receive, from a receiving apparatus, a NACK signal corresponding to the data unit; and

a controller configured to segment the data unit into a plurality of segments, if an amount of available resources is less than an amount of resources required for retransmitting the data unit, and control the transceiver to transmit, to the receiving apparatus, a segment among the plurality of segments, wherein, if the segment is a last segment to be transmitted, the segment comprises second polling information.

7. The apparatus of claim 6, wherein the first polling information indicates to request the receiving apparatus to transmit a status report.

8. The apparatus of claim 6, wherein the second polling information indicates to request the receiving apparatus to transmit a status report.

9. The apparatus of claim 8, wherein the first polling information is different from the second polling information.

10. The apparatus of claim 8, wherein the controller is further configured to:

start a timer after transmitting of the data unit comprising the first polling information; and

if the NACK signal corresponding to the data unit is not received until expiry of the timer, control the transceiver to retransmit, to the receiving apparatus, the data unit comprising the first polling information.