Method and device for handing off between base stations

摘要

The present invention discloses a method and apparatus for handoff between base stations. A target base station bears its PILOT_INC information into a handoff request acknowledge message to inform a source base station when sending a handoff request acknowledge message to the source base station after receiving a handoff request from the source base station, thus, even if a UE requesting handoff reports PILOT_PN_PHASE under the target BS in a residual set, the source BS can determine PILOT_PN corresponding to the PILOT_PN_PHASE through the PILOT_INC information of the target base station, thereby completing cell handoff between the base stations successfully. The present invention is a supplement to the existing handoff between the base stations with configurations of the PILOT_INC information being different, and augments the success rate of handoff between the base stations of the UE, thereby improving the traffic service quality of a CDMA system.

主权项

1. A method for handoff between Code Division Multiple Access (CDMA) base stations comprising:
a target base station configuring a dedicated information unit bearing the PILOT_INC information in the handoff request ACK message, and bearing the PILOT_INC information into the dedicated information unit; the target base station informing a source base station of Pilot pseudo noise sequence offset index increment (PILOT_INC) information of the target base station through a handoff request ACK message after receiving a handoff request message sent by the source base station, wherein the PILOT_INC of the source base station and the PILOT_INC of the target base station is different; the source base station receiving the PILOT_INC information of the target base station, and according to the PILOT_INC information from the target base station to calculate pilot pseudo noise (PILOT_PN) corresponding to the pilot pseudo noise phase (PILOT_PN_PHASE) of the target base station reported by a user equipment that requests handoff between the base stations, thereby making the handoff between the base stations successful; wherein an equation for calculating the pilot pseudo noise is:PILOT_PN=⌊PILOT_PN⁢_PHASE+32×PILOT_INC64×PILOT_INC⌋×PILOT_INC,where PILOT_PN means the pilot pseudo noise, PILOT_PN_PHASE means the pilot pseudo noise phase, and “└ ┘” means rounding down calculation.