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JPH06326652A Expired / Lapsed JP ⏱️ 0.0 years remaining

Channel switching method during communication for spread spectrum mobile communication

Assignee: NTT Docomo Inc
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Filing: 1993-05-12
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Granted: —
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Expires: 2013-05-12
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Abstract

Abstract Translated from Japanese (57)【要約】 【目的】 2系統の受信機をもつことなく、また信号を バースト的とすることなく通話中チャネル切替を可能と する。 【構成】 無線ゾーン2a,2b,2cにトラヒックに 応じて無線チャネルをf1,f2,f3から順に割り当 てる。隣接ゾーンに、自ゾーンに割当てられていない無 線チャネルをチャネル切替専用チャネルとして割り当て る(斜線を施したもの)。同一周波数の無線チャネルに 対しては無線ゾーンごとに異なる拡散かコードを割り当 てる。移動機には2つの相関器15,16を設け、例え ばゾーン2aで周波数f3で通信中に、通話品質が悪く なると、相関器15,16の1つで通信を継続すると共 に、他の方の相関器で拡散コードを走査して、下り信号 の受信レベルの大きいものを探し、例えば無線ゾーン2 bか切替先ゾーンであれば、無線周波数f3、拡散コー ド2による通信へ切替えた後、そのチャネルがチャネル 切替専用のものであるから、チャネル切替専用でない他 のチャネルに同一無線ゾーン内通信中チャネル切替えを 行う。 (57) [Abstract] [Purpose] To enable channel switching during a call without having two receivers and without making signals bursty. [Structure] Radio channels are sequentially assigned to the radio zones 2a, 2b, 2c from f1, f2, f3 according to traffic. A wireless channel that is not assigned to the own zone is assigned to the adjacent zone as a channel switching dedicated channel (hatched). Different spreading or codes are assigned to wireless channels of the same frequency for each wireless zone. The mobile device is provided with two correlators 15 and 16 and, for example, when communication quality deteriorates during communication at the frequency f3 in the zone 2a, one of the correlators 15 and 16 continues communication and the other The spreading code is scanned by the correlator to search for a signal having a high downlink signal reception level. If it is b or the switching destination zone, after switching to the communication using the radio frequency f3 and the spreading code 2, since the channel is dedicated to the channel switching, another channel that is not in the channel switching dedicated communication channel in the same wireless zone. Switch over.

Inventors

  • 👤 Nobuo Nakajima
  • 👤 信生 中嶋
  • 👤 Kenji Imamura
  • 👤 賢治 今村

Bibliographic Details

Application Number —
Jurisdiction JP
Data Source google_patents
Last Synchronized 2026-11-06 03:54
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