Method for selecting service core network node

Abstract

The invention discloses a selecting method of serving core network node, which is characterized by the following: RNC receives direct-transmitting information from UE, which selects serving CN node according to each load condition of CN node in the CN node pool; if RNC can obtain effective route parameter, it selects corresponding route parameter CN node as the serving CN node of UE; if not, RNC selects serving CN node for UE according to load condition of CN node; RNC considers load difference in the CN node, which makes each CN node relative to load of CN node. The invention makes lower CN node bear less UE and business, which reduces over-loading condition probability for CN node.

Description

Technical field [0001] The present invention relates to core network technology, in particular to a method for selecting and serving core network nodes in a core network node pool. Background technique [0002] According to the 3rd Generation Partnership Project (3GPP, 3rd Generation Partnership Project) standard, a radio access network (RAN, Radio Access Network) node can be connected to multiple core network (CN, Core Network) nodes to form a many-to-many correspondence relationship . The RAN node may be a radio network controller (RNC, Radio Network Controller) or a base station controller (BSC, Basic Station Controller). The CN node in the circuit domain is a Mobile Switching Center (MSC, Mobile Switching Centre), and the CN node in the packet domain is a Serving GPRS Support Node (SGSN). [0003] The concept of pool area is proposed in the 3GPP standard. The pool area refers to the area covered by multiple RAN nodes. When a user equipment (UE, User Equipment) roams in the po...

AI Technical Summary

Problems solved by technology

[0013] According to the above description, UE uses IMSI or IMEI as the identifier, and RNC selects the serving CN node for UE according to the V (Value) value calculated by (IMSI Div 10) Mod 1000 or (IMEI Div 10) Mod 1000, so that each CN The probability of nodes being selected is the same, and the load difference of each CN node in the CN node pool is not considered at all. When the capacity and capability of each CN node in the CN node pool are greatly different, the probability of overloading the CN node with lower capacity and capability It will be greatly improved; RNC cannot judge whether UE is roaming locally from other pool areas, because the length of NRI used in different pool areas may be different, so RNC cannot accurately obtain NRI, even if RNC can obtain NRI through direct message, but the The NRI may belong to other CN node pools, so it is meaningless for the RNC to select the serving CN node for the UE in this pool area based on the NRI

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