Patent ID: 6941141

Claim:
A call control method for handoff guarantee in a mobile terminal, the method comprising the following steps of: (a) judging whether the requested minimum bandwidth of handoff is allocable within the currently reserved bandwidth to allocate the requested minimum bandwidth if allocable, when a received handoff call requests the maximum and minimum bandwidths used in a previous call from a base station of a destination cell of the mobile terminal; (b) if not allocable, judging whether the available bandwidth exists in the unreserved bandwidth of the current cell to approve the corresponding call if available and regulate the corresponding call to stand by in a handoff queue if unavailable; judging whether the standby time of the handoff call in the handoff queue exceeds the maximum allowable handoff expiration time to approve the handoff call if not exceeds and block the handoff call if exceeds; allocating the minimum one of the requested maximum bandwidth and the added value of the reserved bandwidth and the available bandwidth in the unreserved bandwidth of the cell; and requesting a bandwidth reservation from an adjacent cell and requesting a previous base station of the handoff call to cancel the bandwidth reserved to a previously adjacent cell.