Transmission level control method and transceiver apparatus in wireless local loop system

• US 8,437,796 B2
• Filed: 05/25/2011
• Issued: 05/07/2013
• Est. Priority Date: 09/24/1998
• Status: Expired due to Fees

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Sato, Shoichi, Arai, Koji
• Primary Examiner(s): Nguyen, David Q
• Application Number:
  US13/115,198
• Publication Number:
  US 20110281611A1
• Time in Patent Office: 713 Days
• Field of Search: 455/522, 455/69, 455/88, 455/70, 370/318
• US Class Current: 455/522
• CPC Class Codes: H04L 1/0001 Systems modifying transmission characteristics according to link quality, e.g. power backoff adaptive data allocation for multicarrier modulation H04L5/0044; controlling transmission power for radio systems H04W52/04
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• CPC Class Codes: H04L 2001/0098 Unequal error protection
• CPC Class Codes: H04W 52/20 using error rate
• CPC Class Codes: H04W 52/265 taking into account the quality of service QoS
• CPC Class Codes: H04W 52/281 taking into account user or data type priority

Abstract

A transmission level control method in a wireless local loop system capable of suppressing occurrence of an unnecessarily high transmission level, comprises a step of generating a required reception level corresponding to a classification of data, a step of detecting the reception level of data at a receiver side transceiver apparatus, a step of finding a level difference between the detected reception level and the required reception level corresponding to the classification of the related received data, and a step of controlling a change of the transmission level at a transmitter side transceiver apparatus according to this level difference.

Claims

1. A transceiver of a first radio station operable to perform communications with another transceiver of a second radio station, the transceiver of the first radio station comprising:

a receiver to receive a signal, including a plurality of bits indicating an identifier that identifies a classification of data of the received signal, from the transceiver of the second radio station;

a processor to determine, based on a power level of the signal received from the transceiver of the second radio station and a power control value corresponding to the identifier, predetermined according to the classification of data, either an amount of transmission level to be increased or an amount of transmission level to be decreased, by which the another transceiver of the second radio station needs to control transmission power of signals to be transmitted to the transceiver of the first radio station; and

a transmitter operable to transmit information indicative of an amount to be increased or information indicative of an amount to be decreased determined by the processor to the another transceiver of the second radio station to cause the another transceiver to change the power by the increase amount or the decrease amount.