Patent ID: 8050250
Filing Date: 2011-11-01
Classification: H04W

Abstract:
1. A selection method for user equipment physical layer to select uplink synchronization code and its transmission moment in uplink pilot time slot in time division synchronization code division multiple access communication system, comprising the following steps of: (A) the user equipment physical layer records available uplink synchronization codes and available uplink synchronization sub-channels configured for each access service class in a system broadcast message; (B) when the user equipment physical layer receives a transmission request of a random access from a media access control layer, the user equipment physical layer finds out the available uplink synchronization codes and the available uplink synchronization sub-channels for this current access based on the access service class carried in the request; (C) the user equipment physical layer randomly selects one of said available uplink synchronization codes as well as one of said available uplink synchronization sub-channels, ensuring that numbers of the sub-channels selected by the user equipment in a cell are equally distributed among all sub-channels; and (D) the user equipment physical layer transmits the selected uplink synchronization code in the uplink pilot time slot corresponding to the selected uplink synchronization sub-channel.