| 摘要 |
<p>The present invention provides a TD-LTE digital trunking communications system and a group service realization method. The method comprises: a calling terminal sending a group establishment request to a core network; the core network searching, according to the group establishment request, a preset tracking area list for a monitoring side cell where a corresponding monitoring terminal lies; the core network establishing calling resources for the calling terminal, and meanwhile establishing group resources for a calling side cell where the calling terminal lies and the monitoring side cell; upon receiving for the first time a group resource establishment success response returned by a monitoring side base station in the monitoring side cell, the core network granting a speaking right to the calling terminal. In the present invention, the establishment process of the calling resources and the establishment process of the group resources are executed in parallel, so as to greatly increase the group service establishment speed, thereby reducing the establishment time delay.</p> |
