Unequal error protection for packet switched networks

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US007206326B2

(12) United States Patent

Samaras et al.

(io) Patent No.: (45) Date of Patent:

US 7,206,326 B2 Apr. 17, 2007

(54) UNEQUAL ERROR PROTECTION FOR PACKET SWITCHED NETWORKS

(75) Inventors: Konstantinos Samaras, Swindon (GB); Jian Jun Wu, Reading (GB)

(73) Assignee: Lucent Technologies Inc., Murray Hill, NJ (US)

( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 0 days.

(21) Appl. No.: 09/980,288

(22) PCT Filed: Apr. 20, 2000

(86) PCT No.: PCT/GB00/01561

§ 371 (c)(1),

(2), (4) Date: Mar. 12, 2002

(87) PCT Pub. No.: WO00/76112

PCT Pub. Date: Dec. 14, 2000 (65) Prior Publication Data

US 2004/0233903 Al Nov. 25, 2004

(30) Foreign Application Priority Data

Jun. 9, 1999 (EP) 99304485

(51) Int. CI.

H04J1/00 (2006.01)
H04J 3/00 (2006.01)
H04B 1/66 (2006.01)

(52) U.S. CI 370/487; 370/493; 370/529;

375/240.27

(58) Field of Classification Search 370/487,

370/493, 535-544, 474, 529; 375/240.24,

375/240.27

See application file for complete search history.

(56) References Cited

U.S. PATENT DOCUMENTS

5,432,778 A 7/1995 Minde

5,729,526 A * 3/1998 Yoshida 370/206

5,815,507 A 9/1998 Vinggaard

5,867,209 A 2/1999 Irie et al.

6,256,487 Bl * 7/2001 Brahn 455/352

6,405,338 Bl * 6/2002 Sinha et al 714/752

6,987,813 Bl * 1/2006 Demetrescu et al 375/295

OTHER PUBLICATIONS

Van Nobelen, R. et al; "An adaptive radio link protocol with enhanced data rates for GSM evolution"; Personal Communications, IEEE [see also IEEE Wireless Communications] vol. 6, Issue 1, Feb. 1999 pp. 54-64 *

* cited by examiner

Primary Examiner—Chi Pham
Assistant Examiner—Tri H. Phan

A method of encoding at least two sets of data bits into a single encoded block is provided, wherein each set of data bits includes a primary set of bits to be encoded and a secondary set of bits to remain unencoded, wherein the encoding technique requires a set of code terminating bits to be added to the primary set of bits; the method comprising: combining the two sets of primary bits, whereby one set of code terminating bits is added to the combined two sets of primary bits. The two sets of data bits may each include a header portion and a payload portion, the payload portion comprising encoded speech. The encoding step may be a channel encoding step for encoding the at least two sets of data bits for transmission on a packet switched network. The data bits may be for transmission on an EDGE packet switched network, wherein the at least two sets of data bits are encoded into a single RLC/MAC block.

5 Claims, 23 Drawing Sheets