电信科学 ›› 2010, Vol. 26 ›› Issue (6): 108-111.doi: 10.3969/j.issn.1000-0801.2010.06.025

• 研究与开发 • 上一篇    下一篇

TD-SCDMA HSPA+CPC E-DCH SPS初始链路适配技术探讨

袁乃华,肖健   

  1. 鼎桥通信技术有限公司 北京 100050
  • 出版日期:2010-06-15 发布日期:2010-06-15

Discussion on E-DCH SPS Initial Link Adaptation Technology of TD-SCDMA HSPA+ CPC

Naihua Yuan,Jian Xiao   

  1. TD-Tech Co.,Ltd.,Beijing 100050,China
  • Online:2010-06-15 Published:2010-06-15

摘要:

随着TD-SCDMA 网络的商用,鼎桥现网设备基本支持HSPA,并从硬件上支持HSPA+功能。在TD-SCDMA现网的HSPA典型配置中,用户基本会配置上下行伴随信道(ADPCH),从而导致系统的接入用户数受到ADPCH码道数的限制。在HSPA+连续分组连接(CPC)技术中,信道配置可以取消上下行伴随信道,通过配置使用E-DCH 半持续调度(SPS)资源传送上行信令或数据,从而取消了上行ADPCH码道限制。本文在分析CPC E-DCH 半持续调度技术的基础上,通过终端接入时的接收信号码功率(RSCP)信息上报,基站的MAC-ehs根据上行时隙的干扰、终端的路损信息、终端能力和网络资源使用情况,初始适配终端的链路质量,计算分配给终端的初始E-DCH 半持续调度资源,从而减少采用固定方式分配初始E-DCH半持续调度资源导致初始授权分配不准确,后续需要通过E-AGCH重配置E-DCH 半持续调度资源的可能性,提高E-AGCH的利用率和系统性能。

关键词: TD-SCDMA, HSPA+, CPC, E-DCHSPS, 链路适配

Abstract:

With the deployment of TD-SCDMA,hardware of the equipment from TD-Tech supports HSPA,and can support HSPA+ with software update.As to the currently configured HSPA parameter configuration,the UE is assigned associated dedicated physical channel(ADPCH),which leads to the limitation of the admitted users.With the HSPA+ continuous packet connectivity(CPC),the E-DCH semi-persistent scheduling can be configured instead of ADPCH to transfer the signaling or data.Without the limitation of ADPCH,the number of admitted user can be increased.In the paper,based on the analysis of E-DCH semi-persistent scheduling technology,with the PCCPCH RSCP,the ISCP of the uplink slot,the path loss and the capability of UE,MAC-ehs in Node B can initially adapt the link quality and assign the semi-persistent scheduling resource more precisely.With the above initial link adaptation,it will decrease the possibility of reconfiguration of the semi-persistent scheduling resource,and increase the channel code usage and network performance.

Key words: TD-SCDMA, HSPA+, CPC, E-DCH SPS, link adaptation

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