Load balance-based SRVCC (Single Radio Voice Call Continuity) switching method and base station

Abstract

The invention discloses a load balance-based SRVCC (Single Radio Voice Call Continuity) switching method and a base station. The method comprises steps: when the number of cell activated users in an eNB reaches an SRVCC switching starting measurement threshold for load balance, a RRC (Radio Resource Control) connection reconfiguration message is sent to UE which is ready for voice business access;the eNB receives a measurement result reported by the UE of measuring an inter-RAT neighbor cell; when the number of the cell activated users in the eNB is larger than the sum of the starting measurement threshold and the user number offset and the lasting time is larger than a preset lasting time period, a switching request carrying a target cell identifier and information to indicate the switching is the load balance-based SRVCC switching is sent to an MME; the MME interacts with an eMSC according to the switching request to realize resource reservation at a circuit domain side of the UE; and when the eNB receives a resource reservation response success returned by the MME, a switching command is sent to the UE to enable the UE to be switched to a target cell of a GSM according to the switching command. The method can reasonably use free 2G / 3G wireless resources in a multi-user scene, and the user experience can be better ensured.

Description

technical field [0001] The invention relates to communication technology, in particular to a load balancing-based SRVCC switching method and a base station. Background technique [0002] As the LTE (Long Term Evolution, long-term evolution) network matures, VoLTE has been fully commercialized in Zhejiang Province. VoLTE (Voice over LTE) is a technical solution for carrying voice over an LTE network, and it is also the ultimate goal of the voice solution in the LTE era. Specifically, the LTE network provides the wireless bearer of the voice, the EPC (core network) provides the management of the bearer, and the IMS (IP Multimedia Subsystem, IP Multimedia Subsystem) domain provides the service management of the voice. Within the coverage area of ​​LTE, IMS-based voice services can be provided through the LTE network. However, if the phone moves out of the coverage area of ​​LTE during a call, it is necessary to support the interoperability between voice over LTE and 2G / 3G netw...

AI Technical Summary

Problems solved by technology

However, the traditional SRVCC handover is inter-system handover based on coverage. In special scenarios, the user experience is often capacity limited rather than coverage limited, and the user's signal level may not reach the threshold for inter-system handover. Unable to initiate SRVCC handover, resulting in low VoLTE call MOS value and poor user experience

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