Based on the background of 23G interoperability optimization, this paper analyzes the shortcomings of the current 23G interoperability optimization, and proposes Bailin Communication's 23G interoperability optimization solution. , And finally showed the implementation case of Bailin Communication 23G interoperability optimization solution.
1 23G interoperability optimization background
1.1 Dynamic network 23G interoperability parameter configuration
A mobile communication network is a constantly developing and dynamically changing network. With new stations entering the network, expanding capacity, relocating and other activities in different periods, this is especially true for TD-SCDMA networks. Local area expansion often occurs. Therefore, how to configure 23G interoperability parameters to ensure the stable improvement of network performance during capacity expansion and relocation, and to improve user's business perception are the primary considerations in 23G interoperability optimization.
At the same time, because of the adjustment of parameters in daily optimization, it is necessary to maintain the linkage modification and consistency of related interoperable parameters on the TD-SCDMA network side and the GSM network side at any time. This verification work is currently done manually, and it is difficult to ensure accuracy and timeliness. .
1.2 The problem of data services returning to the GSM network
With the downward adjustment of mobile communication tariffs, the popularity of multimedia terminals is getting higher and higher, and data services are developing rapidly. The TD-SCDMA network has a much higher wireless transmission rate for data services than the GSM network. It should have carried the main data services. However, the current demand for data services is much smaller than that of the GSM network. Most data services return to the GSM network. It has a huge impact on the performance of the existing network, mainly reflected in the following aspects:
First, the data service flows back from the TD-SCDMA network to the GSM network, the transmission rate of data users drops sharply, and the user's perception of use deteriorates. At the same time, the utilization rate of the TD-SCDMA network drops, resulting in a waste of TD-SCDMA network resources.
Second, the data service flows back from the TD-SCDMA network to the GSM network, which greatly consumes the wireless resources of the GSM network, resulting in insufficient GSM voice and data service resources, which affects the use of GSM users;
Third, the data service flows back from the TD-SCDMA network to the GSM network, which aggravates the system interference of the GSM network, reduces the voice quality, and deteriorates the user's perception of use.
Investigate the reason for its data reflow, in addition to the current imperfect coverage of the TD-SCDMA network and the user's choice of terminal to lock the GSM network, etc. More important is the third reason mentioned below, namely the problem of 23G interoperability parameter optimization.
1.3 The problem of 23G interoperable parameter optimization setting
For a long time, due to the evaluation pressure of drive test indicators and network KPI indicators, some network optimization engineers set the 23G interoperability parameters to be easier to reselect or switch to the GSM network. This kind of "urgency" pushes users to the GSM network. Although the 23G interoperability parameter setting is exchanged for a better KPI index, it actually impairs the user's business perception, because the more easily 23G interoperability occurs and the more frequently it occurs, the easier it is to cause the aforementioned data reflow problem. In addition, in terms of 23G interoperability parameter optimization, some engineers only considered the field strength relationship between the TD-SCDMA cell and the GSM cell, and less considered the interference, performance, and load of the GSM side cell. To sum up, 23G interoperability parameter optimization currently has the following deficiencies:
Mainly for the purpose of network KPI indicators, less from the perspective of user perception
Parameter optimization only considers the field strength relationship, and does not consider the interference relationship of the 23G cell
The neighbor cell configuration only considers the overlap of the field strength, and does not consider the performance load of the 23G cell
1.4 23G interoperability optimization experience needs to be solidified
Through the cooperation of operators, equipment manufacturers, and third-party optimization companies, a large number of optimization experiences and successful cases have been accumulated for 23G interoperability optimization, but these are limited to some people and lack effective and fast communication methods. The interoperability optimization experience is solidified by software, so that ordinary optimizers can optimize 23G interoperability based on the optimization software.
The deployment of the TD-LTE network is approaching. At that time, higher requirements are required for the interoperability optimization of the three networks of GSM / TD-SCDMA / TD-LTE. It is also necessary to provide a convenient and practical tool for network optimization engineers to save Labor costs, improve optimization efficiency.
2 Bailin Communication 23G interoperability optimization solution
2.1 Overview of 23G interoperability optimization solutions
In response to many problems in the current 23G interoperability optimization, Shanghai Bailin has proposed a 23G interoperability optimization solution including co-coverage collaborative optimization, neighbor area quantization optimization, parameter association optimization, G / T offload optimization, etc. We have developed a 23G interoperability optimization software tool, which has solidified the experience of 23G interoperability optimization, so that ordinary optimizers can implement the most concerned 23G interoperability optimization with their software tools.
2.2 Features of 23G Interoperability Optimization Solution
The Shanghai Bailin Communication 23G interoperability optimization solution has the following characteristics:
1. 23G interoperable parameter configuration for capacity expansion and relocation: Comprehensively consider factors such as 2G cell coverage, interference, load, and performance, and avoid one-sided consideration of the limitations caused by field strength.
2. Solve the problem of TD network data service backflow 2G network: solve the problem of data service backflow, reduce the load pressure of 2G network, and improve the performance of 2G network.
3. Improve the utilization rate of TD network code resources: reduce the 23G switching ratio, increase the utilization rate of TD network resources, consolidate the achievements of TD network construction, and increase the input-output ratio of TD network.
4. Improve the service perception of TD network and 2G network users: optimization is mainly based on perception orientation, supplemented by index orientation.
5. Optimization based on tool platform throughout: Through the 23G interoperability optimization of software tools, high efficiency, good effect, and risk.
2.3 23G Interoperability Optimization Solution Content
The implementation of Bailin Communication's 23G interoperability optimization solution is as follows:
1. 23G interoperability performance evaluation: A detailed and practical evaluation of 23G interoperability makes optimization targeted
2. 23G network co-coverage optimization: Through 23G coverage collaborative optimization, solving cross-zone, weak coverage, etc.
3. 23G neighbor relationship optimization: comprehensively consider the field strength, interference and performance factors to match 23G neighbors
4. 23G switching parameter optimization: comprehensively consider the field strength, interference and performance factors to optimize the switching parameters
5. 23G reselection parameter optimization: comprehensively consider field strength, interference and performance factors to optimize reselection parameters
6. G / T distribution optimization: G / T distribution optimization based on the analysis of SGSN bill data
3 Key technologies of 23G interoperable solutions
3.1 23G network co-coverage optimization
The coverage problem is currently the root cause of 23G interoperability. Therefore, the TD network continuity coverage optimization is used to maximize the coverage problem, and the GSM network depth coverage is optimized to ensure interoperability and intra-network performance. In this scheme, the coverage optimization of the TD-SCDMA network and the GSM network is organically combined, that is, the coverage optimization of the coordinated combination changes the disadvantages of "considering each other" in the traditional optimization.
The optimization of the TD coverage layer is used to extend the hard coverage of the TD network to maximize the absorption of network traffic. The optimization of the GSM coverage layer improves the performance of 23G interoperability optimization, the performance of the packaging network, and unifies the optimization of the two on one optimization platform.
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