Signaling data compression/decompression devices and methods for wireless communication networks

Patent metadata

Field	Value
Publication number	US-9307444-B2
Application number	US-201214357412-A
Country	US
Kind code	B2
Filing date	Nov 9, 2012
Priority date	Nov 9, 2011
Publication date	Apr 5, 2016
Grant date	Apr 5, 2016

Abstract

A compression device which may include: a subset determination circuit configured to determine a subset of a traffic indication map, the traffic indication map including a plurality of bits, each bit indicating whether data to be transmitted to a respective pre-determined radio communication terminal is present in an access point; a pre-determined bit value determination circuit configured to determine whether the subset includes a bit of a pre-determined bit value; and a compressed string generation circuit configured to insert, if the subset includes a bit of the pre-determined bit value, into a compressed string the subset and an indicator indicating that the subset includes a bit of the pre-determined bit value, and further configured to include, if the subset does not includes a bit of the pre-determined bit value, into the compressed string an indicator indicating that the subset does not include a bit of the pre-determined bit value.

First claim

What is claimed is:

1. A compression device comprising:
a subset determination circuit configured to determine a subset of a traffic indication map, the traffic indication map comprising a plurality of bits, each bit indicating whether data to be transmitted to a respective pre-determined radio communication terminal is present in an access point;
a pre-determined bit value determination circuit configured to determine whether the subset comprises a bit of a pre-determined bit value; and
a compressed string generation circuit configured to insert, if the subset comprises a bit of the pre-determined bit value, into a compressed string the subset and an indicator indicating that the subset comprises a bit of the pre-determined bit value, and further configured to insert, if the subset does not comprise a bit of the pre-determined bit value, into the compressed string an indicator indicating that the subset does not comprise a bit of the pre-determined bit value,
wherein the compression device is further configured to perform compression of the indicators using the subset determination circuit, the pre-determined bit value determination circuit, and the compressed string generation circuit.

2. The compression device of claim 1 ,
wherein the indicator indicating that the subset comprises a bit of the pre-determined bit value comprises a bit of a pre-determined first bit value, and
wherein the indicator indicating that the subset does not comprise a bit of the pre-determined bit value comprises a bit of a pre-determined second bit value.

3. The compression device of claim 1 ,
wherein the compression device is further configured to process a plurality of subsets of the traffic indication map using the subset determination circuit, the pre-determined bit value determination circuit, and the compressed string generation circuit.

4. A compression method comprising:
determining a subset of a traffic indication map, the traffic indication map comprising a plurality of bits, each bit indicating whether data to be transmitted to a respective pre-determined radio communication terminal is present in an access point;
determining whether the subset comprises a bit of a pre-determined bit value;
inserting, if the subset comprises a bit of the pre-determined bit value, into a compressed string the subset and an indicator indicating that the subset comprises a bit of the pre-determined bit value, and inserting, if the subset does not comprise a bit of the pre-determined bit value, into the compressed string an indicator indicating that the subset does not comprise a bit of the pre-determined bit value; and
performing compression of the indicators using the subset determination, the pre-determined bit value determination, and the compressed string generation.

5. The compression method of claim 4 ,
wherein the indicator indicating that the subset comprises a bit of the pre-determined bit value comprises a bit of a pre-determined first bit value, and
wherein the indicator indicating that the subset does not comprise a bit of the pre-determined bit value comprises a bit of a pre-determined second bit value.

6. The compression method of claim 4 , further comprising:
processing a plurality of subsets of the traffic indication map using the subset determination, the pre-determined bit value determination, and the compressed string generation.

7. The compression device of claim 1 ,
wherein the predetermined bit value is one.

8. The compression device of claim 1 ,
wherein the compressed string generation circuit is configured to insert into the compressed string only an indicator indicating that the subset does not include a bit of the pre-determined bit value, if the subset does not include a bit of the pre-determined bit value.

9. The compression device of claim 1 ,
wherein the compressed string generation circuit is configured to generate the compressed string free of the subset, if the subset does not include a bit of the pre-determined bit value.

10. The compression method of claim 4 , further comprising:
determining whether the subset includes a plurality of bits following a pre-determined pattern.

11. The compression method of claim 4 , further comprising:
inserting into the compressed string only an indicator indicating that the subset does not include a bit of the pre-determined bit value, if the subset does not include a bit of the pre-determined bit value.

12. The compression method of claim 4 , further comprising:
generating the compressed string free of the subset, if the subset does not include a bit of the pre-determined bit value.

Assignees

• Agency Science Tech & Res

Inventors

• Wang Haiguang
• Zheng Shoukang
• Pathmasuntharam Jaya Shankar
• Yu Rongshan
• Yeow Wai Leong
• Oh Ser Wah
• Hoang Anh Tuan
• Teo Chee Ming Joseph

Classifications

• H04W28/06 Primary

  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 title

• H04W52/02

  Power saving arrangements · CPC title

• H04W52/0216

  using a pre-established activity schedule, e.g. traffic indication frame · CPC title

• H04L69/04 Primary

  Protocols for data compression, e.g. ROHC · CPC title

• Y02D30/70

  in wireless communication networks · CPC title