Patent ID: 8903395

Claim:
A mobile station (MS) reattaching method, comprising: determining, by a serving base station (BS), according to mobility restriction information maintained by the serving BS itself, whether an MS is allowed to access a target base station (BS), and if the MS is allowed to access the target BS, returning to the MS a handover response indicating that MS reattachment is allowed; wherein the mobility restriction information is one of the group consisting of: the serving BS's reattachment zone information, and both the serving BS's reattachment zone information and the MS's permitted entry zone information, wherein the determining, by the serving BS, according to the mobility restriction information, whether the MS is allowed to access the target BS comprises at least one of the group consisting of: determining, by the serving BS, according to the BS's reattachment zone information, whether the target BS is in the same reattachment zone as a serving BS, and allowing the MS to access the target BS if the target BS is in the same reattachment zone as the serving BS; and determining, by the serving BS, according to the BS's reattachment zone information, whether the target BS is in the same reattachment zone as a serving BS, and determining, according to the MS's permitted entry zone information, whether the target BS is in the MS's permitted entry zone, and allowing the MS to access the target BS if the target BS is in the same reattachment zone as the serving BS and is in the MS's permitted entry zone.