Title:
可変エンコーディングレベルを提供する方法およびそのための装置およびシステム
Document Type and Number:
Japanese Patent JP4700207
Kind Code:
B2
Abstract:
An apparatus, method and system provide for variable encoding levels for encoding of in-band control messages in wireless telecommunication systems. In the various embodiments, ANSI-136 handoff and geolocation messages may be encoded utilizing different code rates, and are then transmitted in lieu of voice data in a fast associated control channel (FACCH). The preferred system embodiment includes a transceiver (base station) and a mobile switching center. The mobile switching center includes instructions to create a message for transmission during a communication session. When the message is necessary for continuation of the communication session, such as a hand off message, the mobile switching center includes further instructions to select a first encoding level from a plurality of encoding levels, such as a robust ¼ convolutional code, and to encode the message using the first encoding level to form the encoded message for transmission. When the message is not necessary for continuation of the communication session, such as a geolocation message, the mobile switching center includes instructions to select a second encoding level from the plurality of encoding levels, such as a less robust ½ convolutional code, and to encode the message using the second encoding level to form the encoded message for transmission. Variable encoding levels are also provided for corresponding variable channel conditions and message length.
Inventors:
Stinson Masai
Application Number:
JP2001076122A
Publication Date:
June 15, 2011
Filing Date:
March 16, 2001
Export Citation:
Assignee:
Alcatel-Lucent USA Inc.
International Classes:
H04B14/04; H04J3/00; H04L1/00; H04W28/04
Foreign References:
| WO1999002430A1 |
Other References:
Nanda, S.; Balachandran, K.; Kumar, S.,Adaptation techniques in wireless packet data services,Communications Magazine,IEEE,2000年,Volume: 38 , Issue: 1 ,p.54-64
Attorney, Agent or Firm:
Okabe
Masao Okabe
Nobuaki Kato
Kazuo
Shinichi Usui
Ikuo Fujino
Takao Ochi
Teruhisa Motomiya
Norimichi Takanashi
Asahi Shinmitsu
Seiichiro Takahashi
Koji Yoshizawa
Hirofumi Mimata
Masao Okabe
Nobuaki Kato
Kazuo
Shinichi Usui
Ikuo Fujino
Takao Ochi
Teruhisa Motomiya
Norimichi Takanashi
Asahi Shinmitsu
Seiichiro Takahashi
Koji Yoshizawa
Hirofumi Mimata