最新刊期
卷 29 ， 期 4 ， 2013
- 摘要：The development trend of new generation internet was analyzed.The vision of the new generation internet was also presented.At last，some key technologies related with the new generation internet were discussed.关键词：new generation internet;network virtualization;network intelligence;network security;IP1676|2268|0更新时间：2024-06-05
Viewpoint focusing
- 摘要：The definition of IPTV and OTT TV was described as well as development status，and the differences both in the business model and technology were also analyzed.From the user’s point of view，the main form of television in the future，and a detailed analysis of the end trends of IPTV and OTT TV business were depicted.关键词：triple-play;IPTV;OTT TV;smart TV terminal1722|2886|0更新时间：2024-06-05
- 摘要：The current situation of smart TV terminal industry was introduced.With a general introduction on the influence of the audiovisual service itself and its forms that the terminal is getting“smart”，some key technologies on which these new services are based were given.Based on the analysis on the industry situation and key technologies，it is indicated that the trend of smart terminal is irreversible and would finally change the form of audiovisual service industry.关键词：smart TV terminal;smart operation system;Android1411|1590|0更新时间：2024-06-05
- 摘要：The new business trend and innovative collaboration mode about intelligent terminals，especially the intelligent TV terminals，were thought in this triply-play market.Based on the close co-operation of each part on the chain，the thinking and scheme for creating a more efficient，sustainable and large-scaled intelligent terminal eco-system was focused and the integration difficulty of content，value-added service and application form were reduced，through establishing the standards and methods of service plan.关键词：intelligent terminal;triply-play;over the top;IPTV1287|1238|0更新时间：2024-06-05
- 摘要：Based on the analysis of the evolution of smart TV terminal，the traditional way of service open by operators and the changes aroused from the appearing of smart TV terminal were introduced.According to the changes above，two alternative ways of automatic service open were presented and compared in detail in order to put forward the suggestions for the way of automatic service open.关键词：smart TV terminal;automatic service open;terminal management system;null configuration;activation of automatic service1404|1341|0更新时间：2024-06-05
- 摘要：Nowadays operators are focusing on developing the video communication services based on smart terminals.The characteristics and key affecting factors of video communication quality were discussed.Furthermore，according to the analysis of the methods of subjective and objective video quality assessment，an assessment model of video communication service quality was proposed and verified by experimental data，which can provide test reference and evaluation methods for operators to improve the quality of video communication service.关键词：video communication;video quality assessment;smart terminal;assessment model1432|2378|0更新时间：2024-06-05
- 摘要：Android set-top box（STB）is well developed of its open and cross platform and the rich application.But security is one of the key issues of open systems.A software security scheme based on CPU for Android STB was proposed.By using OTP data and secure booting，the secure chain was set up to ensure safety of the software system，and the CPU based terminal authentication extends the secure domain to the CPE，provided the stability of the services.关键词：smart TV terminal;OTP;secure booting;software security;Android1335|1254|0更新时间：2024-06-05
- 摘要：With the development of internet business，intelligent terminals are becoming more and more popular.Faster CPU operating speed，more convenient operating system and flash and RAM with larger capacity than before are brought by terminal intelligence.Intelligent set-top box（STB）can support the IPTV service and OTT service at the same time.The method of estimating video quality experience，differences between IPTV and OTT service business realization mechanism in intelligent terminal was discussed.According to the difference between two types of video service，the method and requirement of quality assurance for video service was presented in the intelligent set-top box.关键词：smart TV terminal;IPTV;OTT;quality guarantee;quality of experience1474|1225|0更新时间：2024-06-05
Topic: smart TV terminal technology and Application
- 摘要：The inter-cell interference coordination（ICIC）of OFDMA system was studied，and a dynamic ICIC algorithm based on the theory of partially observable Markov decision process（POMDP）was proposed.The statistic model of interference and SINR of channel was combined to allocate channels for cell-edge user in this algorithm.Simulation results show that the proposed scheme can efficiently avoid interference for the cell-edge user.Since this algorithm avoids the coordination between cells，the system overhead is saved.Furthermore，a likelihood relation between SINR and interference was established by using particle filter，so there was no necessary for system to measure the interference.关键词：OFDMA system;multi-cell;inter-cell interference coordination;partially observable markov decision process1557|964|0更新时间：2024-06-05
- 摘要：In order to verify the protocol conformance of radio resource management（RRM）cell reselection in TD-LTE system，a new testing method was designed by implementing testing and test control notation version 3 （TTCN-3）abstract test suit.Furthermore，the test suit was operated on the TTworkbench developed by German Testing Tech.The graphical presentation format（GFT）and test report to check the protocol conformance of cell reselection were generated.The scheme has been successfully applied in the project development of TTCN extended testing set instrument（RRM part）in TD-LTE system.关键词：TTCN-3;RRM;conformance testing;cell reselection1152|1073|0更新时间：2024-06-05
- 摘要：In the cognitive radio network，when the primary users show up，the secondary users should vacate the channel and find another free channel for data transmissions.This is the so-called spectrum handoff.There are two most important performance metrics for spectrum handoff：handoff delay and handoff times.A novel spectrum handoff scheme with channel sensing sequencing was proposed in order to decrease both handoff delay and handoff times.When designing the channel sensing sequence，the channel free probability was considered，and the probability that no handoff will happen in a channel was considered as well.The simulation results show that the method not only can get the minimum handoff delay as the traditional method does，but also can decrease the handoff times were significantly compared with the traditional method.关键词：spectrum handoff;handoff delay;handoff times;channel sensing sequencing1164|792|0更新时间：2024-06-05
- 摘要：With the rapid development of wireless communication technology，the demand for wireless resources increases quickly，and to improve the quality of service are required by users.Therefore，the intelligence is needed to carry out an effective compromise between user quality of service（QoS）requirements and wireless resource constraints in future communication systems.In order to enhance the spectral efficiency in cognitive radio network（CRN），multi-user subcarrier power joint allocation algorithm based on rate adaptive（RA）criterion in cognitive orthogonal frequency division multiplexing（OFDM）system was proposed in the constraint conditions of available subcarrier，secondary user（SU）power budget and rate fairness，with the consideration of rate fairness between SUs.This algorithm was separated into two steps with subcarrier and power allocation respectively.The proposed scheme could maximize link capacity with the consideration of the fairness among all SUs.Simulation results show that the joint allocation algorithm can get effective tradeoff between system throughput and the rate fairness of SU.关键词：cognitive radio network;fairness;subcarrier allocation;power allocation;rate adaptive967|691|0更新时间：2024-06-05
- 摘要：In wireless environment，the increases in the number of users and the demand for a higher rate have triggered rapidly booming energy consumption at the base station.Therefore，energy efficient design in wireless network has become very essential.An energy efficient multi-user OFDM downlink resource allocation scheme was studied，using the distributed way.Firstly，according to user’s average channel gain and the minimum requirements of user’s bits，subcarriers were allocated，combined with the idea of proposed energy-efficient criterion.Then better channels were assigned to each user in accordance with each user’s allocated subcarrier numbers.Again each user’s average bits were assigned on the user’s allocated subcarriers and optimal adjustment using energy-efficient criterion had to be made to ensure the minimum power.The simulation results show that under the conditions of satisfying bit-error rate and transmission rate for users，the power can be reduced by 5～6 dB in the proposed algorithm，compared with the power in the static frequency division multiple access resource allocation.Furthermore，the power can be reduced by 2～4 dB，compared with the power in a existing classical distributed algorithm.关键词：energy efficient;multi-user OFDM;minimum power;distributed algorithm1034|747|0更新时间：2024-06-05
- 摘要：One of the most popular research focuses of wireless sensor network is postponing the life cycle of sensor network as well as reducing energy consumption.An efficient clustering routing algorithm based on LEACH（low energy adaptive clustering hierarch）was presented，which is the representative of hierarchy based protocol in wireless sensor network.The residual energy，average energy and maximum energy are considered in this algorithm while electing the cluster header.It can also limit the number of members of each cluster.At the same time，it can produce the first cluster header among the cluster heads which will use the multi-hop mode to balance the load of network.The simulation results show that this improved algorithm can reduce the energy consumption，extend the network life cycle and ensure the load balance of the system.关键词：wireless sensor network;LEACH protocol;LEACH-Ⅱ protocol;life cycle1116|1317|0更新时间：2024-06-05
- 摘要：Based on a detailed research on the mechanism of downlink data transmission in LTE system，an errorfree HARQ solution to realize the downlink data transmission process was provided.According to the relations of the feedback delay，associated decision of feedback judgment and retransmission priority were adopted to complete the correspondence between them.A research on RTT of synchronous and asynchronous HARQ and the influence of different UL-DL configurations on HARQ RTT were also studied.Then a method to minimize RTT was put forward to provide reference for eNode B to choice configurations when providing different communication services.关键词：LTE;round trip time;UL-DL configuration;HARQ1149|1282|0更新时间：2024-06-05
- 摘要：As one kind of the main resources of cloud computing，virtual resource sustains sorts of cloud services，and an effective resource scheduling mechanism helps to balance the load and improve the resource utility rate.Focusing on virtual resource of cloud，a resource scheduling mechanism to achieve load balancing was proposed.Triggered by an incoming job，the scheduler checked the instant state of resource pool first，and then took interrelated strategies.关键词：cloud computing;cloud services pool;virtual machine;resource scheduling1349|2103|0更新时间：2024-06-05
- 摘要：In order to solve the multi-users’ resource allocation problem of OFDM systems under the underlay spectrum sharing mode conveniently and efficiently，a fair resource allocation algorithm with low complexity was proposed.The fair subcarrier allocation algorithm was applied to allocate subcarrier for cognitive users to turn the complex problem of resource allocations into a simple problem of a single user power allocation.Also a linear capped water-filling algorithm with low complexity was used to solve the subcarrier power allocation problem.Simulation results show that，compared with other methods，the proposed method has very good effectiveness and superiority in application to the TV frequency’s OFDM system.关键词：Underlay spectrum sharing;OFDM，resource allocation for multi-users;subcarrier allocation;linear capped water-filling algorithm1121|895|0更新时间：2024-06-05
- 摘要：For orthogonal frequency division multiple access-based decode-and-forward（OFDMA-DF）relay uplinks communication system，a new algorithm with proportional fairness constraints of users’ rate was presented.The new algorithm was divided into two steps.Firstly，under equal power distribution，the user with the lowest proportional capacity had the option to pick which subcarrier and relay to use.Then，based on this basis，power allocation was optimized on subcarriers and the power allocation results were given.Analysis results demonstrate that the new algorithm can not only obtain high system capacity，but also guarantee fairness between users.关键词：OFDMA;relay;decode-and-forward;proportional rate constraint;resource allocation902|738|0更新时间：2024-06-05
- 摘要：A pure statistical indoor path-loss model was proposed with an eye to address the problems of distance dependence and of line-of-sight（LOS）or non-LOS uncertainty，which lie in most conventional path-loss models.In the model，the path length（distance）was taken as a random variable，and the uncertainty of LOS or NLOS was represented by an alternating frequency between LOS and non-LOS channel conditions.Without knowing the priori path length，the model can estimate or predict the loss of path based on the priori knowledge of the radius of operating space，of the LOS/NLOS alternating frequency and of a confidence interval describing the path quality.In addition，three quality of services（QoS）for different quality requirements were proposed in order to conserve energy.As opposed to assuming fixed available power or covering the largest possible distance，which is typical in conventional models，the QoS-oriented model has significant advantages on resource allocation and energy conservation.Through a case study，it is indicated that this model is simple and practical.关键词：pathloss;indoor;statistics;statistical of path-loss;quality of service1265|868|0更新时间：2024-06-05
- 摘要：Cloud security has been widely considered as the key factor restricting its development since the cloud computing technology emerged.The insecure factors of cloud computing system and the secure factors which cloud computing brings were presented and discussed.It was pointed out that cloud security depended on the validate deployment of the security policy.Cloud computing system is not less secure than native environment，as long as the right agreement is signed with cloud provider.Finally，the proposal of security policy was provided from both the cloud provider domain and the cloud user domain to ensure the security of cloud computing system.关键词：cloud computing;cloud security;virtualization;cloud provider domain;cloud user domain1002|1565|0更新时间：2024-06-05
- 摘要：In order to solve the problem of low channel utilization in the traditional TDMA protocol，an interleaving TDMA（I-TDMA）protocol was presented，which took advantage of the long propagation delay in underwater channels and improved channel utilization by interleaving data packets in empty time axis.Moreover，the topology extension and circle synchronization schemes was adopted to strengthen the expansibility of network systems.Simulation results indicate that I-TDMA has lower delay and synchronic overhead than those of the traditional TDMA protocol，and can achieve better performance.关键词：underwater acoustic network;MAC protocol;TDMA;interleaving transmission960|931|0更新时间：2024-06-05
- 摘要：With the development of network technology and its broad applications，more and more applications involve privacy.Therefore，standardization of privacy protection becomes a hot topic.Privacy protection work by international standard organizations was introduced，and then the main features，and difficulty and key points for that were analyzed.According to the analysis，the trend of standardized work in privacy protection was also discussed.关键词：network;privacy protection;standardization1168|1178|0更新时间：2024-06-05
research and development
- 摘要：With the rapid development of spatial data collection technology in recent years，many efforts have been devoted to the research on trajectory based user behavior analysis and its applications，due to their academic interests；they also show promising business opportunities.From the application aspect，in principle，current issues in trajectory based user behavior analysis can be classified into two major categories：the intelligent transportation applications and the user behavior based applications.The state-of-the-art progress of these categories were reviewed.For each category，its main focus and related achievements were discussed.What’s more，the main technical characteristics of the means used were also summarized in current studies.关键词：location based service;behavior trajectory analysis;intelligent transportation;social network;big data1566|4484|0更新时间：2024-06-05
- 摘要：In order to satisfy the spectrum requirements of the next generation international mobile telecommunication （IMT）system，to realize scientific allocation and usage of spectrum resources and to avoid spectrum waste brought by allocation in advance，there is a need to make a reasonable estimation for the spectrum demands of future IMT systems.The estimation results can also provide guidelines for the subsequent spectrum planning and assignment work.The progress of study related IMT spectrum estimation was given.From the analysis of current work and practical situation，the key factors in the estimation methodology were summarized to provide a reference for the following work.关键词：spectrum requirement;spectrum estimation;IMT system1201|957|0更新时间：2024-06-05
sum up
- 摘要：From the competitive situation of internet broadband services in domestic operators，CMNet MAN business network architecture situation and existing problems were analyzed combined with the trends of the broadband business application development.The plaftorm construction of optimizing resource control mobile CMNet MAN was raised under conditions of ultra-broadband，and the sink service control layer BRAS and aggregation switches，optimized WLAN bearer，the CMNet metro and transport network joint networking strategy were also proposed.关键词：ultra-broadband;metro network;resource management and control;sinking deployment;optimize network1622|1867|0更新时间：2024-06-05
- 摘要：The importance and difficulties of security audit software correlation analysis technique of business support system（BSS）for telecom operator was analyzed，and then solutions for small probability correlation analysis were proposed.Finally the model principle of small probability correlation analysis，design method，implementation steps and actual effects were described.关键词：security audit;correlation analysis;small probability analysis974|843|0更新时间：2024-06-05
- 摘要：Mobile VPDN is also known as wireless IP private network or 3G IP private network.It offers data private network service based on 3G network to all enterprise customers.Key factors of mobile VPDN，such as flexible network building，the policies of security authentication and service guarantee，were analyzed.A security-enhanced model and a controllable networking solution were introduced.关键词：mobile VPDN;MPLS;manageable and controllable878|1354|0更新时间：2024-06-05
- 摘要：The new security problems in the cloud computing environment were studied based on the characteristics of China Telecom business platform.On the basis of these studies，the security protection framework and construction scheme of cloud computing business platform were put forward.关键词：business platform;cloud computing;security framework993|807|0更新时间：2024-06-05
- 摘要：Wind-solar hybrid power system based on the wind energy and solar energy is an ideal and clean solution for the power supply of communication base station，especially for those located at remote areas such as islands.The hybrid power system provides reliable power supply while reducing the initial investment，the maintenance costs and carbon emission.A practical and reliable designing scheme of wind-solar hybrid power technical solution was presented and analyzed for a communication base station in a remote island.关键词：communication base station;wind-solar hybrid power system;energy saving and emission reduction;island1023|1093|0更新时间：2024-06-05
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