Patent ID: 9749988
Date: 2017-08-29
CPC Classifications: H04W

Claim:
1. A called recovery method, comprising: receiving, by a target mobile switching center (MSC), a provide roaming number (PRN) message sent by a backup MSC corresponding to a faulty MSC, wherein the PRN message carries an instruction for initiating paging to a called terminal through a mobility management entity (MME), wherein the receiving step is preceded by selecting, by the backup MSC, an MSC with the lowest load except the faulty MSC as the target MSC and sending a PRN message that includes an address or index of the MME to the target MSC in the instruction for initiating the paging; and performing, by the target MSC, international mobile subscriber identity (IMSI) paging according to the address or index of the MME in the instruction for initiating the paging, to enable the MME to which the called terminal is attached to control the called terminal to perform circuit switched fallback (CSFB) to complete a called connection.