Method, SN, base station and system for performing cell merging on the basis of multiple Smallcell base stations

Abstract

The invention relates to a method, an SN, a base station and a system for performing cell merging on the basis of multiple Smallcell base stations. The method comprises that: after the SN receives a cell establishment request of an RNC, a same-frequency logic cell is established on the basis of a logic base station formed by merging of the multiple Smallcell base stations; an Iub interface control plane is realized in the SN, and wireless links between the SN and the corresponding Smallcell base stations are established; and data transmission and resource management are performed on the same-frequency logic cell on the basis of the wireless links. RNC capacity expansion, soft handover between a large number of Smallcells and cross-RNC Iur soft handover between macro-micro cells caused by application of the large number of Smallcell base stations can be avoided. Besides, reuse of HS-PDSCH code track resources can also be realized and throughput of the same-frequency logic cell can be enhanced.

Description

technical field [0001] The present invention relates to the field of communication technology, and in particular to a method for combining cells based on multiple Smallcell (microcell) base stations in a WCDMA system, SN (Signal Node B, signaling base station), Smallcell base stations and a system. Background technique [0002] In the UMTS wireless access system, there are two key network elements, RNC (Radio Network Controller, Radio Network Controller) and Node B. In the general network construction mode, the main coverage method is: RNC plus multi-sector integration Macro base station, or RNC plus distributed base station BBU+macro RRU, in addition, there are a few micro base stations to cover blind spots or hot spot coverage. From the perspective of the whole network coverage, most of them are macro cells plus a few micro cells. [0003] With the rapid development of mobile broadband services, various 3GPP-standard smart terminals (mobile phones, data cards, iPads, etc.)...

AI Technical Summary

Problems solved by technology

This results in that every time a hotspot is expanded, it needs to be configured on the RNC side;

[0008] 2) When multiple Smallcells are deployed, it is easy to cause the need for RNC expansion

First of all, the number of base stations connected by RNC is limited, so the deployment of a large number of Smallcells will lead to a large number of RNC expansion, and the site space of the computer room will also increase, resulting in a sharp increase in CAPEX and OPEX;

[0009] 3) The number of cells connected to the RNC is also limited, and the utilization rate is low. A large number of Smallcell applications lead to rapid expansion of the RNC configuration, because generally speaking for the capacity of an RNC, the capacity of the number of cells is an important bottleneck. One cell of a SmallCell base station Although the capacity is relatively small, the RNC still needs to allocate resources and processing capabilities of a cell just like a macro cell

[0010] 4) Mobility between Smallcells will lead to a large number of soft handover signaling on the Iub interface;

[0011] 5) Since Smallcell and Macrocell are connected to different RNCs on the logical connection, the software handover between Smallcell and Macrocell of the terminal UE becomes Iur soft handover across RNCs. There are many signaling interactions, prolonged handover, and handover call drop High rate, high resource consumption

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