一种基于双频连接的小小区发现方案
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摘要
在小小区大量部署的异构蜂窝网络中,用户进行异频扫描所检测的载波数相比传统部署场景会大量增加,因此用户能耗也会相应增长。提出一种新的基于双频连接的小小区发现策略,以解决网络边缘用户在进行小小区发现时的能效问题。通过灵活的异频扫描策略,大大减少用户进行异频检测的能量消耗,相对于现有的基于射频指纹数据库的小小区发现方案,该方案实现简单且频谱利用率高。仿真表明,该方案能有效降低用户能耗,提高用户异频扫描有效性,同时避免高速移动用户进行异频扫描。
In the heterogeneous network that small cells largely deployed, the number of carriers that users need to detect when performing inter-frequency scanning compared with the traditional network scenario, exponentially, so it will consume users a lot of energy. This paper proposes a new small cells discovery strategy based on dual band connection, to solve the problems that energy consumption of users in the edge of network. This scheme uses flexible inter-frequency scanning strategy of users, to reduce the energy consumption of the user hen performing inter-frequency scanning. Compared with the existing scheme which based on finger-print database, it is simple, feasible and has high spectrum efficiency. Simulations show that the scheme can effectively reduce the energy consumption of the user, improve effectiveness of inter-frequency scanning, and avoid high speed mobile user performing in-ter-frequency scan.
In the heterogeneous network that small cells largely deployed, the number of carriers that users need to detect when performing inter-frequency scanning compared with the traditional network scenario, exponentially, so it will consume users a lot of energy. This paper proposes a new small cells discovery strategy based on dual band connection, to solve the problems that energy consumption of users in the edge of network. This scheme uses flexible inter-frequency scanning strategy of users, to reduce the energy consumption of the user hen performing inter-frequency scanning. Compared with the existing scheme which based on finger-print database, it is simple, feasible and has high spectrum efficiency. Simulations show that the scheme can effectively reduce the energy consumption of the user, improve effectiveness of inter-frequency scanning, and avoid high speed mobile user performing in-ter-frequency scan.
引文
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[2]DAVE S,DUBEY A,MACWAN S,et al.5G cellular communication system with millimeterwaves:study of requirements,hardware and biological effects[C].IEEEInternational Conference on Research in Computational Intelligence and Communication Networks,2015.
[3]DAMNJANOVIC A,MONTOJO J,WEI Y,et al.A survey on 3GPP heterogeneous networks[J].Wireless Communications IEEE,2011,18(3):10-21.
[4]RYU Y,KIM J G.Cell search for 3GPP LTE system us ing interference cancellation[C].2015 Seventh International Conference on ICUFN,2015:579-584.
[5]PRASAD A,LUNDEN P,TIRKKONEN O,et al.Energyefficient flexible inter-frequency scanning mechanism for enhanced small cell discovery[C].Vehicular Technology Conference.IEEE,2013:1-5.
[6]HONG Y,XU X,TAO M.Predictive connection time based small cell discovery strategy for LTE-advanced and beyond[C].Wireless Communications and NETWO-RKING Conference.IEEE,2014.
[7]PRASAD A,LUNDEN P,TIRKKONEN O,et al.Energy efficient small-cell discovery using received signal strength based radio maps[C].Vehicular Technology Conference(VTCSpring),2013 IEEE 77th.IEEE,2013:1-5.
[8]MAHBAS A.Double spectrum small cell(DSSC)for discovering inter-frequency small cell in Het Net[C].IEEEInternational Conference on Communications.IEEE,2015.
[9]3GPP TR 36.839.E-UTRA;Mobility enhance-ments in heterogeneous networks[S].Ver.0.5.0,2012.
[10]Nokia Siemens Networks,Nokia Corporation.R2-116151:Small cell detection in Het Net environment[Z].2011.