Base station apparatus for radiocommunication network, method of controlling communication across radiocommunication network, radiocommunication network system, and radio terminal apparatus

• US 6,256,334 B1
• Filed: 09/22/1997
• Issued: 07/03/2001
• Est. Priority Date: 03/18/1997
• Status: Expired due to Fees

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Adachi, Hideo
• Primary Examiner(s): Chin, Stephen
• Assistant Examiner(s): Liu, Shuwang
• Application Number:
  US08/935,255
• Time in Patent Office: 1,380 Days
• Field of Search: 375/219, 375/132, 375/134, 375/130, 375/136, 375/138, 370/319, 370/328, 370/330, 370/338, 370/343, 370/344, 370/480, 370/310, 370/252
• US Class Current: 375/132
• CPC Class Codes: H04B 1/7143 Arrangements for generation of hop patterns
• CPC Class Codes: H04B 1/7156 Arrangements for sequence synchronisation
• CPC Class Codes: H04B 2001/7154 with means for preventing interference

Abstract

A base station apparatus for a radiocommunication network in which radiocommunication with one or more radio terminal apparatuses is established according to a frequency hopping scheme. The base station apparatus includes a search section which searches for another radiocommunication network in the vicinity of the base station apparatus when the base station apparatus is started, and when another radiocommunication network is detected, obtains the pattern and time of frequency hopping in another radiocommunication network. A frequency hopping selection/setting section selects the pattern obtained by the search section as the frequency hopping pattern for the base station apparatus, and selects, on the basis of the time obtained by the search section, timing at which the frequency hopping based on the pattern does not cause frequency interference with respect to frequency hopping performed in another radiocommunication network, and carries out frequency hopping of the pattern at the thus-selected timing. It becomes possible to improve the throughput of the network system such as a radio LAN.

Claims

1. A base station apparatus for a radiocommunication network in which radiocommunication with one or more radio terminal apparatuses is established according to a frequency hopping scheme, said base station apparatus comprising:

(I) a transmission/reception section for interfacing a radio signal inputted to/outputted from said base station apparatus via radio;

(II) a search section for obtaining a first pattern of the frequency hopping scheme, which is included in the radio signal, used in a vicinity of another radiocommunication network via a probe response signal reception section; and

(III) a frequency hopping selection/setting section for setting, as an own pattern of the frequency hopping of said base station apparatus, a second pattern of the frequency hopping scheme which is identical with the obtained first pattern of the frequency hopping scheme of the another radiocommunication network and which is different in hopping timing from the obtained first pattern of the frequency hopping scheme of the another radiocommunication network.

2. The base station apparatus for radiocommunication network according to claim 1, further comprising a timing adjustment section which, during the course of ordinary operation, adjusts the hopping timing of the second pattern of the frequency hopping scheme of said base station apparatus relative to the hopping timing of the first pattern of the frequency hopping scheme of the another communications network.

3. A method of controlling communication across a radiocommunication network which includes one or more radio terminal apparatuses and a base station apparatus which establishes communication with the radio terminal apparatus according to a frequency hopping scheme,

wherein said base station apparatus searches for another radiocommunication network in the vicinity of said base station apparatus when said base station apparatus is started;

and when said another radiocommunication network is detected, said base station apparatus obtains a first pattern of the frequency hopping scheme of said another radiocommunication network, selects a second pattern of the frequency hopping scheme which is the same as the obtained first pattern of said another radiocommunication network and carries out frequency hopping of the selected second pattern at a hopping timing different from a hopping timing of the obtained first pattern of said another radiocommunication network.

4. The method of controlling communication across a radiocommunication network according to claim 3, wherein said base station apparatus, during the course of ordinary operation, adjusts the hopping timing of the frequency hopping of the selected second pattern of said base station apparatus relative to the hopping timing of the frequency hopping the obtained first pattern performed in said another communications network.