Controlling channel switching in a UMTS network
    1.
    发明授权
    Controlling channel switching in a UMTS network 有权
    控制UMTS网络中的信道切换

    公开(公告)号:US07099622B2

    公开(公告)日:2006-08-29

    申请号:US10399251

    申请日:2001-10-29

    IPC分类号: H04B7/15

    CPC分类号: H04W36/06 H04W28/14

    摘要: In a UMTS Terrestrial Radio Access Network (UTRAN), a method of switching from a current common channel to a dedicated channel for a UE. The method comprises estimating the round trip delay for data packets travelling between the UE and a peer node with which the UE is communicating. The product of the estimated round trip delay and the bandwidth of the common channel or the dedicated channel is determined and a threshold defined on the basis of that product. A switch from the common channel to a dedicated channel is initiated when the fill level of the RLC buffer(s) in the UTRAN for the UE reaches or exceeds said threshold.

    摘要翻译: 在UMTS陆地无线电接入网络(UTRAN)中,一种从当前公共信道切换到用于UE的专用信道的方法。 该方法包括估计在UE与UE正在通信的对等节点之间行进的数据分组的往返行程延迟。 确定估计的往返延迟和公共信道或专用信道的带宽的乘积以及基于该乘积定义的阈值。 当用于UE的UTRAN中的RLC缓冲器的填充级别达到或超过所述阈值时,启动从公共信道到专用信道的切换。

    Packet scheduling in a communications system
    4.
    发明授权
    Packet scheduling in a communications system 有权
    通信系统中的分组调度

    公开(公告)号:US06850540B1

    公开(公告)日:2005-02-01

    申请号:US09698785

    申请日:2000-10-27

    摘要: Methods, systems, and arrangements enable packet scheduling in accordance with quality of service (QoS) constraints for data flows. In a Universal Mobile Telecommunications System (UMTS) network environment, for example, a Medium Access Control (MAC) layer schedules packet transmission of various data flows to meet stipulated criteria, including permitted transport format combinations (TFCs) from a TFC set (TFCS). In first embodiment(s), the TFC is selected based on guaranteed rate transmission rates, weighted fair queuing (WFQ) transmission rates, QoS class, transport block set size (TBSS), and optionally queue fill levels. These first embodiment(s) also further refine the selection process using backlog memories corresponding to previously unmet guaranteed and/or fair transmission rates. In second embodiment(s), memory requirements are reduced by selecting a TFC based on guaranteed rate transmission rates, QoS class, TBSS, and queue fill levels, without accommodating backlogs.

    摘要翻译: 方法,系统和布置使得能够根据数据流的服务质量(QoS)约束来进行分组调度。 在通用移动通信系统(UMTS)网络环境中,例如,介质访问控制(MAC)层对各种数据流进行分组传输以满足规定的标准,包括来自TFC组(TFCS)的允许的传输格式组合(TFC) 。 在第一实施例中,基于保证速率传输速率,加权公平排队(WFQ)传输速率,QoS类别,传输块集大小(TBSS)和可选的队列填充级别来选择TFC。 这些第一实施例还使用与先前未满足的保证和/或公平传输速率相对应的备用存储器进一步改进选择过程。 在第二实施例中,通过基于保证的速率传输速率,QoS类别,TBSS和队列填充级别选择TFC来减少存储器需求,而不需要容纳积压。