Method for transmitting and receiving control data in mobile telecommunications system and transmitter and receiver of mobile telecommunications

• US 8,249,103 B2
• Filed: 08/06/2008
• Issued: 08/21/2012
• Est. Priority Date: 08/10/2007
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Yi, Seung-June, Park, Sung-Jun, Lee, Young-Dae, Chun, Sung-Duck
• Primary Examiner(s): Mehrpour, Melody
• Application Number:
  US12/669,022
• Publication Number:
  US 20100184424A1
• Time in Patent Office: 1,476 Days
• Field of Search: 370/242, 370/310, 370/241, 370/252, 370/328, 370469-479, 370 82- 83, 3703951-3957, 370464-468
• US Class Current: 370/469
• 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 80/02 Data link layer protocols

Abstract

A method for transmitting and receiving control data of a PDCP layer, a transmitting apparatus and a receiving apparatus in a mobile communication system are disclosed. Several control information (e.g., information regarding a status report and information about an HC feedback) are simultaneously transmitted through a single control PDU, so the size of headers can be reduced, compared with the case where each control information is transmitted through each control PDU from a transmitting side to a receiving side, thus improving transmission efficiency and efficiency of resources.

Claims

1. A method for transmitting control data of a PDCP (Packet Data Convergence Protocol) layer in a mobile communication system, the method comprising:

generating a control PDU (Packet/Protocol Data Unit) including one or more first control information and one or more second control information generated at a PDCP layer; and

transmitting the generated control PDU,

wherein the generated control PDU includes an E (Extension) field indicating whether next control information exists,

wherein the E field indicates the presence of fields in the order of a ‘

Control PDU Type’

filed, a ‘

Length’

field, and an ‘

E’

field, as header information corresponding to the next control information, or

the E field indicates, if there is a ‘

Reserved’

field for a header byte alignment, the presence of the ‘

Reserved’

field and that control information starts at the next byte, or

the E field indicates that control information starts at the next byte, if there is no ‘

Reserved’

field.

2. The method of claim 1, wherein the first control information is information about a PDCP status report, and the second information is header compression feedback information.

3. The method of claim 1, wherein the E field indicates the presence of fields in the order of the ‘

Length’

field of current control information, the ‘

Control PDU Type’

field of next control information, and the ‘

E’

field of the next control information, or

the E field indicates the presence of the ‘

Reserved’

field for a header byte alignment and indicates that control information starts at the next byte.

4. The method of claim 1, wherein the E field indicates the presence of fields in the order of the ‘

Control PDU Type’

field of the current control information, the ‘

Length’

field of the current control information, and the ‘

E’

field of the next control information, or

the E field indicates the presence of fields in the order of the ‘

Control PDU Type’

field of the current control information and the ‘

Reserved’

field for the byte alignment, and indicate that control information starts at the next byte.

5. The method of claim 1, wherein the control information is information about a PDCP status report or header compression feedback information.

6. The method of claim 1, wherein the generated control PDU comprises:

a header having header information corresponding to the first control information and/or second control information; and

a payload having the first control information and/or second control information,

wherein the header includes a ‘

D/C’

field, one or more ‘

control PDU Type’

fields, the ‘

Length’

field, and the ‘

E’

field.

7. The method of claim 6, wherein the generated control PDU further comprises:

the ‘

Reserved’

field for the header byte alignment, and the ‘

Reserved’

field is included in the header.

8. The method of claim 1, wherein the generated control PDU includes header information comprised of a corresponding ‘

Control PDU Type’

field and ‘

E’

field, omitting the ‘

Length’

field, with respect to the first or second control information positioned at the end of the control PDU structure.

9. A method for receiving control data of a PDCP (Packet Data Convergence Protocol) layer in a mobile communication system, the method comprising:

receiving a control PDU including one or more first control information and one or more second control information generated at a PDCP layer; and

performing header decompression on the received control PDU,

wherein the control PDU includes an E (Extension) field indicating whether next control information exists,

wherein the E field indicates the presence of fields in the order of a ‘

Control PDU Type’

filed, a ‘

Length’

field, and an ‘

E’

field, as header information corresponding to the next control information, or

the E field indicates, if there is a ‘

Reserved’

field for a header byte alignment, the presence of the ‘

Reserved’

field and that control information starts at the next byte, or

the E field indicates that control information starts at the next byte, if there is no ‘

Reserved’

field.

10. The method of claim 9, wherein the first control information is information about a PDCP status report, and the second control information is header compression feedback information.

11. A transmitting apparatus in a mobile communication system comprising:

a transmission module that generates a control PDU (Packet/Protocol Data Unit) including one or more PDCP status reports and one or more header compression feedback information generated at a PDCP layer and transmits the generated control PDU,

wherein the generated control PDU includes an E (Extension) field indicating whether next control information exists,

wherein the E field indicates the presence of fields in the order of a ‘

Control PDU Type’

filed, a ‘

Length’

field, and an ‘

E’

field, as header information corresponding to the next control information, or

the E field indicates, if there is a ‘

Reserved’

field for a header byte alignment, the presence of the ‘

Reserved’

field and that control information starts at the next byte, or

the E field indicates that control information starts at the next byte, if there is no ‘

Reserved’

field.

12. A receiving apparatus in a mobile communication system comprising:

a reception module that receives a control PDU (Packet/Protocol Data Unit) including one or more PDCP status reports and one or more header compression feedback information generated at a PDCP layer and performs header decompression on the received control PDU,

wherein the control PDU includes an E (Extension) field indicating whether next control information exists,

wherein the E field indicates the presence of fields in the order of a ‘

Control PDU Type’

filed, a ‘

Length’

field, and an ‘

E’

field, as header information corresponding to the next control information, or

the E field indicates, if there is a ‘

Reserved’

field for a header byte alignment, the presence of the ‘

Reserved’

field and that control information starts at the next byte, or

the E field indicates that control information starts at the next byte, if there is no ‘

Reserved’

field.