This paper proposed an optimized fast handoff scheme for real time applications in next generation IP based CDMA wireless networks. The idea is to utilize optimized IP multicasting handoff (based on PIM SM), which is ...This paper proposed an optimized fast handoff scheme for real time applications in next generation IP based CDMA wireless networks. The idea is to utilize optimized IP multicasting handoff (based on PIM SM), which is triggered by CDMA layer 2 functionality. An IP based cellular network model with WCDMA FDD air interface and IP based packet traffic is adopted. No special network entities and signaling for handoff are added in our network model. The simulation results show that low delay and low packet lost rate can be obtained.展开更多
在互联网时代的宏观背景下,需要了解基于IP无线接入网(IP Radio Access Network,IPRAN)的主要作用。在本地网组网技术模式研究中,可以利用分组传输的数据值,通过设备实现基站业务回传和专线业务综合接入。IPRAN有极高的便捷性和兼容性,5...在互联网时代的宏观背景下,需要了解基于IP无线接入网(IP Radio Access Network,IPRAN)的主要作用。在本地网组网技术模式研究中,可以利用分组传输的数据值,通过设备实现基站业务回传和专线业务综合接入。IPRAN有极高的便捷性和兼容性,5G综合业务接入网IPRAN是未来的重要发展趋势,具有高品质、多点化服务特征。在承载需求上,从长期演进(Long Term Evolution,LTE)角度出发,依托区域骨干网对IPRAN组网各设备的构建和组网需求进行分析,实现综合业务接入网IPRAN的本地网组网技术模式的规划完善。展开更多
合适的多址接入MAC(multiple access)协议是提升网络性能的关键。根据短波地空IP网络通信覆盖范围广、难同步,空中节点信息可能丢失的特点,设计出该网络一种新型的带预约短波令牌协议HFTP-R(High Frequency token protocol with reserve...合适的多址接入MAC(multiple access)协议是提升网络性能的关键。根据短波地空IP网络通信覆盖范围广、难同步,空中节点信息可能丢失的特点,设计出该网络一种新型的带预约短波令牌协议HFTP-R(High Frequency token protocol with reserve)。该协议在初始化时由空中节点随机加入地面节点形成的簇,并通过预约信道向地面节点发送预约信息,从而获取令牌接入信道,地空之间不需要保持逻辑环的"封闭性"。最后,利用OPNET软件构建了HFTP-R的仿真框架,与其他MAC协议作了仿真比较。仿真结果表明,HFTP-R减少了短波令牌协议HFTP(High Frequency token protocol)的令牌丢失次数和传递开销,能提供较好的实时性、较高的网络吞吐量和业务传输成功率,在特定需求下较其他MAC协议更有优势,可满足网络需要。展开更多
文摘This paper proposed an optimized fast handoff scheme for real time applications in next generation IP based CDMA wireless networks. The idea is to utilize optimized IP multicasting handoff (based on PIM SM), which is triggered by CDMA layer 2 functionality. An IP based cellular network model with WCDMA FDD air interface and IP based packet traffic is adopted. No special network entities and signaling for handoff are added in our network model. The simulation results show that low delay and low packet lost rate can be obtained.
文摘在互联网时代的宏观背景下,需要了解基于IP无线接入网(IP Radio Access Network,IPRAN)的主要作用。在本地网组网技术模式研究中,可以利用分组传输的数据值,通过设备实现基站业务回传和专线业务综合接入。IPRAN有极高的便捷性和兼容性,5G综合业务接入网IPRAN是未来的重要发展趋势,具有高品质、多点化服务特征。在承载需求上,从长期演进(Long Term Evolution,LTE)角度出发,依托区域骨干网对IPRAN组网各设备的构建和组网需求进行分析,实现综合业务接入网IPRAN的本地网组网技术模式的规划完善。
文摘合适的多址接入MAC(multiple access)协议是提升网络性能的关键。根据短波地空IP网络通信覆盖范围广、难同步,空中节点信息可能丢失的特点,设计出该网络一种新型的带预约短波令牌协议HFTP-R(High Frequency token protocol with reserve)。该协议在初始化时由空中节点随机加入地面节点形成的簇,并通过预约信道向地面节点发送预约信息,从而获取令牌接入信道,地空之间不需要保持逻辑环的"封闭性"。最后,利用OPNET软件构建了HFTP-R的仿真框架,与其他MAC协议作了仿真比较。仿真结果表明,HFTP-R减少了短波令牌协议HFTP(High Frequency token protocol)的令牌丢失次数和传递开销,能提供较好的实时性、较高的网络吞吐量和业务传输成功率,在特定需求下较其他MAC协议更有优势,可满足网络需要。
