An improved apparatus and method for performing initial cell...

H - Electricity – 04 – J

Patent

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Details

H04J 3/06 (2006.01) H04B 1/707 (2006.01)

Patent

CA 2451242

The system and method of the present invention establishes a communication link (Fig. 3) between a user equipment (4) and a base station (2) in a communication system having a plurality of base stations which each transmit a common primary synchronization code (PSC) in a primary synchronization channel in conjunction with a base station specific secondary synchronization code within a system frame (Fig. 2), which receives with the UE an input signal including the PSC and SSC from at least one of the base stations. The UE analyzes the input signal to detect any received PSCs within a selected time period which has duration corresponding to the length of a system frame and determining a relative location of a strongest PSC (26) within the selected time period. The input signal is then processed to remove the PSC from at least the determined PSC location. A secondary synchronization code (SSC) is then detected for the determined location from the processed signal. The communication link is then established using the detected SSCs.

L'invention concerne un système et un procédé qui permettent d'établir une liaison de communications (fig. 3) entre un équipement d'utilisateur (UE) (4) et une station de base (2) dans un système de communication doté de plusieurs stations de base. Chaque station de base transmet un code de synchronisation primaire (PSC) commun dans une voie de synchronisation primaire, corrélativement à un code de synchronisation secondaire (SSC) spécifique des stations de base, à l'intérieur d'une trame (fig. 2), laquelle reçoit avec l'UE un signal d'entrée accompagné du PSC et du SSC émanant au moins d'une des stations de base. L'UE analyse le signal d'entrée afin de détecter un quelconque PSC reçu dans un laps de temps déterminé, dont la durée correspond à la longueur d'une trame du système; et détermine un emplacement relatif d'un PSC plus puissant (26) dans ledit laps de temps. Le signal d'entrée est ensuite traité afin de retirer le PSC d'au moins l'emplacement déterminé du PSC. Un code de synchronisation secondaire (SSC) est ensuite détecté pour l'emplacement déterminé à partir du signal traité. La liaison de communications est alors établie au moyen des SSC détectés.

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