最新刊期
卷 29 ， 期 2 ， 2013
- 摘要：The paper started from the great changes of China telecom networks over the past 14 years and analyzed the past and present of telecom industry，and concluded the necessity of transformation. Then，the paper described the relationship between transformation and De-Telecom and presented main reasons why De-Telecom was necessary. In the fo11owing part，the paper introduced major trends of De-Telecom and difficulties. Then，the paper presented the continuous and enlarged gap between revenue and traffic and major ideas to dea1 with. Next，the paper elaborated major cha11enges and thinkings on IP and internet. In the fina1 part，the paper predicted 1ikely trends for telecom industry briefly.关键词：transformation;De-Telecom;telecom industry648|1960|0更新时间：2024-06-05
Viewpoint focusing
- 摘要：In response to meet the need of immense amounts of network traffic，brought by mobile internet，a new network form of the heterogeneous network should be introduced into 4G network，and a multi-network inte11igent interworking of “mobile smart pipe”is to be built，in order to firstly make a breakthrough on network architecture. New technologies as LTE wireless hierarchica1 networking（HetNet），inter ce11 interference coordination，and LTE and WLAN networks inte11igent integration based on SaMOG（S2a Mobility based on GTP），ANDSF，combined with 3GPP standardization progress were introduced，and prospects of 4G technology were given.关键词：HetNet;eICIC;CoMP;SaMOG;ANDSF604|1068|0更新时间：2024-06-05
- 摘要：With the development of commercia1 LTE network，service gradua11y becomes one of the most important driving force of LTE deployment，especia11y as it could be reflected in the advantages，1ike including highbandwidth，1ow delay and QoS guarantee of LTE. The LTE service of the foreign operators had been described，and the current voice and data service had also been analyzed. Furthermore，the service with LTE characters was discussed and prospected，combining the advantage of the LTE technologies.关键词：LTE;service deployment;typica1 service678|1502|0更新时间：2024-06-05
- 摘要：3GPP standards about LTE and WLAN network integration and ANDSF were introduced，and the possibilities of a11 types of policy contro11ed handover between LTE and WLAN，using ANSDF，had been inquired into，including network architecture，policy type definition，combined policy analysis，etc.关键词：LTE;WLAN;IP flow mobility;contro1 strategy;ANDSF649|1075|0更新时间：2024-06-05
- 摘要：With the development of mobile internet network technique，mobile internet network service has become the fastest growing and the 1argest potentia1 field in the market. As is known to a11，the vigorous development of mobile internet network service has close connection with the mature of telecom operators’ 3G network. According to the development trend of mobile internet services，service requirements of LTE were analyzed and some solutions about undertaking existing services，as we11 as evolution direction in architecture and function about service network in LTE were given.关键词：LTE;mobile internet network;service;service network649|1492|0更新时间：2024-06-05
- 摘要：Voice service is one of the basic services that the mobile internet carrier provides for its users. There are severa1 schemes to carry on the voice service in LTE era. The VoLTE scheme was focused on and had been studied both in theoretica1 and implementation views. Based on the 3GPP standards，the key technologies of VoLTE had been clarified，and the network architecture was also studied. Specifica11y，the interoperability between VoLTE and the 1egacy networks was analyzed to guarantee the continuity of service. Additiona11y，suggestions were given for the VoLTE development and business conducting.关键词：VoLTE;IMS;SRVCC;QoS821|1958|0更新时间：2024-06-05
Special topics: LTE new technology and new business
- 摘要：The virtual resources description and discovery is an important premise for resources allocation in network virtual environment，however，there lacks efficient resource description method meeting the virtual resources characteristics in the current study. A new resource description mechanism was put forward which can describe virtual resources with different granularity by analyzing the virtual resources characteristics. And the efficiency of resource allocation has been promoted by the experiment using different granularity of resource description and this resource discovery method.关键词：virtual resources character;resources granularity;resources description;resources discovery692|1300|0更新时间：2024-06-05
- 摘要：In order to solve the unprecedented issues during the TT&C system running，two fresh indicators named the stability of the hopping pattern and the stability of frequency hopping gain were presented. The indicators can improve the test system of TT&C. The novelty and importance in testing of TT&C were analyzed；the meaning of the indicators from both qualitative and quantitative aspects was defined；the test method of the indicators was provided，and a new algorithm used to correct the test error about the stability of the hopping pattern was proposed. At 1ast，a variety of visualization technologies were studied. The analysis and simulation results show that the indicators can describe the phenomenon effectively in the system，the methods can accurately complete the test and the visualization scheme can show the test results from different visions.关键词：hybrid spreading spectrum TT＆C system;test method;stability616|1023|0更新时间：2024-06-05
- 摘要：A tree sparsity mode1 based image compressed sensing（CS）algorithm was proposed to efficiently explore the correlation in visua1 sensor networks（VSN）data. Based on the analysis of wavelet sparsity，a tree sparsity mode1 for VSN image was established and a new CS recovery algorithm for this mode1 was proposed. Analysis and experimenta1 results demonstrate that the proposed algorithm can significantly reduce the measurement for the accurate recovery，and subsequently 1ower energy consumption of data traffic in VSN.关键词：visua1 sensor network;compressed sensing;tree sparsity;data reconstruction482|692|0更新时间：2024-06-05
- 摘要：Based on the idea of cooperated and converged transmission for the heterogeneous network，a designing architecture of transmission testbench for cooperated and converged ubiquitous network was proposed. Two main kinds of function entities of integrated access gateway and service contro1 server were elaborated. Under the existing heterogeneous wireless network environment，the multi-path para11e1 transmission testbench used to transmit the high speed video media service was constructed. The key technologies were explained，and the result of test was described.关键词：cooperated and converged ubiquitous network;high speed video service;multi-path para11e1 transmission;transmission testbench275|550|0更新时间：2024-06-05
- 摘要：The aim of unified identifier authentication（UIA）is to 1og in multiple services with only one identifier to simplify user’s access. Currently，the study of UIA is on its early stage. Taking into account UIA’s functionality requirements，implementation of UIA，as a service in public network，was suggested，and an architecture of UIA service network was proposed. The UIA service network consists of multiple UIA service providers. Each is responsible for management and authentication of unified identifiers of 1oca1 users and services. A provider could interoperate with others to authenticate non-1oca1 identifiers through bridge services of themselves. A hierarchy deployment mode1 of UIA service network based on politica1 administration regions was proposed as we11. Fina11y，the standards system of UIA service was discussed.关键词：unified identifier authentication;identifier authentication;public network;standard337|663|0更新时间：2024-06-05
- 摘要：In order to solve the dilemma of the tradeoff between spectrum sensing performance and spectrum sensing efficiency in cognitive radio network，a nove1 ED/FD cooperation spectrum sensing algorithm based on featured belief points was proposed. Firstly，this algorithm desployed the single cognitive user energy detection and feature detection co11aborative detection mode instead of multiple cognitive user cooperative detection，reducing communication overhead. Secondly，it modeled cognitive radio network under dynamic uncertainty using partia11y observable Markov decision processes（POMDP），and transformed the optimization of the tradeoff between sensing performance and sensing efficiency into yielding the optima1 value function of POMDP. Fina11y，a nove1 approach using characteristics of belief to contro1 the scale of belief states was presented，which exploited the maximum online reward value iteration algorithm to approximate the optima1 value. The numerica1 results show that the proposed algorithm is able to meet the requirement of high tracking performance with constraint of 1ow probability of interfering primary users.关键词：cognitive radio network;spectrum sensing;energy detection;feature detection;partia11y observable Markov decision process258|560|0更新时间：2024-06-05
- 摘要：The value of signa1 noise ratio（SNR）is very 1ow in conventiona1 OTDR. The employed Golay complementary sequence was proposed instead of single pulse to solve that problem. By theoretica1 analysis and simulation demonstration，it was verified that this method could effectively increase the SNR.关键词：SNR;Golay complementary sequence;correlation389|1157|0更新时间：2024-06-05
- 摘要：With the rapid development of wireless high-speed data services，broadband has become an inevitable trend in the development of wireless private network. As one of the private wireless network communication systems，the broadband multimedia cluster system has its own characteristics，which is based on wireless broadband technology，using the form of multimedia services，to command and dispatch functions mainly，etc. During the commanding and dispatching process of the broadband multimedia cluster system，voice，image，video and packet data service become its necessary 1inks and tools. Focusing on how to achieve the broadband multimedia cluster communication system in rea1-time media，and scheduling co11ege storage of information，an audio and video recording contro1 mechanism was researched and designed for efficient storage of multimedia data，through the coordination between switch &contro1 center and record server.关键词：broadband multimedia;cluster communication system;record contro1 protoco1262|724|0更新时间：2024-06-05
research and development
- 摘要：As a representative of the third generation vehicle communication technology and a typica1 application of internet of things，vehicle network is being paid much attention to by the industry chain. The cha11enges were analyzed which vehicle network development is facing from the points of view of technology，market and business mode1 based on current status of application and research，and then the roles and opportunities of telecommunication operator in the industry chain were presented thoroughly. Fina11y，studies on the new technologies such as LTE，mobile internet and cloud computing which would impact on the future vehicle network.关键词：vehicle network;telecom operator;vehicle communication317|1698|0更新时间：2024-06-05
Overview
- 摘要：A UMTS 900 MHz planning resolution based on the feasibility analysis of UMTS 900 MHz implementation was proposed. The deployment of UMTS 900 MHz in Shekou area in Shenzhen，taking the advantage of 1ow-frequency signa1 diffraction capability，expand the depth of the coverage and also provide an expansion of frequency used for UMTS.关键词：UMTS;900 MHz;implementation;planning307|1113|0更新时间：2024-06-05
- 摘要：A genera1-purpose data service platform for telecom company based on .NET framework was designed and implemented. The platform carries out the business data cleansing and extraction process and then generates the data mart via ETL tools. System users interact with the data mart via SOA-based data service middleware，which acts as a job scheduler and cube query executer. Particularly，the platform generates a wizard style interface as defined in XML configuration files. Characterized by quick configuration，safeness and flexibility，the system can serve the frontline staffs and senior analytica1 managers at the same time，and has been successfu11y applied in a telecom company.关键词：data service;ETL;OLAP;data mart225|964|0更新时间：2024-06-05
- 摘要：The optica1 passive devices in ODN，such as optica1 fiber connector，optica1 power splitter，field-mountable optica1 fiber connector and optica1 fiber were analyzed. Based on the experience of our tests in recent years，the existing problems and reasons of the products were described. The quality assurance and contro1 of product were also suggested. Besides，it described the factors 1eading to testing errors which was easily overlooked in the test method and test procedure for insertion 1oss—the most important technica1 specification of optica1 passive devices.关键词：ODN;optica1 fiber connector;optica1 power splitter;field-mountable optica1 fiber connector;quality;test224|758|0更新时间：2024-06-05
- 摘要：Cloud computing security issue is one of the most important and difficult problems encountered in today’s cloud computing technology to promote 1anding.From the cloud computing security in the information security section，the basic content of information security in cloud computing and the current cloud computing were described；information security issues were analyzed；some of the solutions and the prospects of cloud computing were given. Fina11y，a brief discussion of GMCC private cloud platform cloud computing security practice was presented.关键词：cloud computing;information security;cloud security471|1584|0更新时间：2024-06-05
- 摘要：Influence of the always-on service of 1ittle traffic on Ev-Do network was analyzed. Optimization solutions especia11y for the always-on service of 1ittle traffic were given. Also，the coping strategies such as wireless operation index forecast and traffic guidance were put forward.关键词：instant message;Internet of things;always-on service of 1ittle traffic;Ev-Do262|754|0更新时间：2024-06-05
On Operational Innovation
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