Research On Improvement Of Conformance Testing Protocol To Interoperate Over TD-SCDMA And GSM System

TD-SCDMA network has certain cover width and breadth with development up to now. Butrelated to original GSM network, TD-SCDMA network still belongs to weak network. Theoriginal GSM network has a considerable number of users. So how to make full use of existingstable network resources and customers, realize extending TD-SCDMA network coverage,guarantee voice services developing steadily and make network users transit smoothly, have veryimportant realistic meanings. Using relay technology to expand wireless communication networkcoverage, cost at a low level. In addition, using relay coordination for transmission between thesource and destination node, could get the space cooperation diversity gain, so as to effectivelycombat channel fading and improve the reliability of transmission. As TD-SCDMA technologybecame matures, network users need higher qualities of2G/3G interoperability voice servicesand data grouping services. In order to improve frequently dropping voice services and terminalbroke away from network problems in2G/3G interoperability,3GPP protocol standardintroduced High Speed Uplink Packet Access (HSUPA) technology, to improve uplink packetdata transmission rate and throughput, reduce transmission delay.So relay node selection algorithm and HSUPA technology were focused on, how tooptimize complexity of the node selection algorithm, reduce the communication cost brought byalgorithm, at the same time of increasing network capacity, reducing power consumption andimproving uplink packet data peak transmission rate were studied. Tree table descriptionlanguage TTCN was used as a language tool, protocol conformance testing system in depth wasstudied. By means of descriptions of testing purpose and information interaction task on8.3.11.14chapter of3GPP protocol34.123-1-880, definition of data structure, definition ofcontrol observation point, definition PDU type, definition ASP type, definition constants,variables and timers were taken. Second programme on testing protocol to produce2G/3G interoperability protocol conformance test cases were taken. Finally S7568terminal was used,which carried8810scheme, to run test cases in2G/3G interoperability environment, and usedMSC for simulation.