TRANSMISSION LEVEL CONTROL METHOD AND TRANSCEIVER APPARATUS IN WIRELESS LOCAL LOOP SYSTEM

• US 20110281611A1
• Filed: 05/25/2011
• Published: 11/17/2011
• Est. Priority Date: 09/24/1998
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: SATO, Shoichi, Arai, Koji
• Granted Patent: US 8,437,796 B2
• Time in Patent Office: Days
• 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 signal generator to generate a signal by using an identifier of power control change set a predetermined value and a power control value identified by a plurality of bits and corresponding to the identifier, the signal indicating either an amount of transmission level to be increased or an amount of transmission level to be decreased, by which another transceiver of the second radio station controls transmission power of signals to be transmitted to the transceiver of the first radio station; and

a transmitter operable to transmit information indicative of amount to be increased or information indicative of amount to be decreased generated by said signal generator to another transceiver of the second radio station to cause another transceiver to change the power by the increase amount or the decrease amount.