| As of April,2011, the overall number of Chinese mobile users has exceeded 900 million. The intelligent portable terminals with big display screen, high availability and low power consumption have also become more and more popular. There are more than 300 million Chinese people right now using their mobile phones to access internet. With the rapid developing of 3G mobile telecommunication service, some problems are also poping up, such as:How to make use of the current resource of WCDMA mobile network more effectively to enable end user enjoy the applications provided by multimedia at any time and in any place, so as to ensure one mobile phone cover full network of voice, TV and Internet? How to provide some kind of multimedia services with huge amount of data, long lasting and little latency (e.g. VOD, TV broadcast, Video Conference, On-line education, interactive games, etc) to moble users in the current WCDMA network?In answer to above questions, WCDMA/GSM 3GPP (Third Generation Partnership Project) defined MBMS (Multimedia Broadcast/Multicast Service) in the new Release 6, which makes it possible for WCDMA network to provide killing added-value data service and mobile TV service. MBMS can use one resource to send service to multi-users via point to multi-point technology. The utilization of resource is upon the quantity of the content channel instead of subscriber numbers. In this way, it is possible to and enhances the utilization ratio of network resource, especially the air interface resource.The standardization of MBMS commenced in Y2002 and was finalized by December,2005. Up to now, it is still not confirmed by when the commercial deployment in volume will begin. As a matter of fact, though it is possible to do software upgrade only on Radio Access System (RAN) after MBMS getting engaged, Radio Resource Management (RRM) will still become more complicated at RAN side when a number of users try to receive the same huge-data-required multimedia service. It is essential to have a well developed RRM algorithem to mix the multi service with different type and different quality required. This thesis is exactly for this target:to have detailed investigation on how WCDMA radio software release (UA7) supports MMBS, how to optimize the RRM algorithem of UA7 after introducing MBMS, as well as to study the key technology within UA7 to support MBMS.Followings are the main topics of this thesis:Allocation of MBMS control channelsSignaling of MBMS air interface and RNCFLC (Frequency Layer Convergence) and FLD (Frequency Layer Dispersion) of MBMSSelective combination and soft combination of MBMSIub transmission sharing of MBMSAdmittance and Occupancy of MBMSCongestion Control of MBMSPower of service channel and code resource managementCounting and re-countingRRM of Point to Point mode and Point to Multi-point modeALU (Alcatel-Lucnet) is the third largest telecommunication product and solution provider worldwide. ASB (Alcatel-Lucent Shanghai Bell) is the flagship of ALU in China to provide up-to-date end-to-end solution and service to Chinese telecom operators. As mobile market is the market with full competition, it is very important for the operator to deploy not only a good quality 3G network with mature equipment, but also to provide more attractive application and service so as to gain the competitiveness during network expansion and operation. The new release of RAN software (UA7) provided by ASB is exactly to cater for that requirement. |
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