Scheduling method for supporting quality of service (QoS) in wireless local area network (WLAN)
    31.
    发明授权
    Scheduling method for supporting quality of service (QoS) in wireless local area network (WLAN) 失效
    无线局域网(WLAN)中支持服务质量(QoS)的调度方法

    公开(公告)号:US07515574B2

    公开(公告)日:2009-04-07

    申请号:US11181463

    申请日:2005-07-14

    IPC分类号: H04W4/00

    摘要: A method for polling of stations in a Wireless Local Area Network (WLAN), including the steps of: obtaining Quality of Service (QoS) information related to the stations; assigning two timers to each WLAN service requiring QoS guarantee, one for uplink transmission and the other for downlink transmission; starting a Controlled Access Period (CAP) when a minimum timer Tm is below the threshold Tthr; polling the station with the minimum timer; updating the minimum timer after a polling message is sent; quitting CAP and permitting the resource contention if the minimum timer Tm is larger than the threshold Tthr.

    摘要翻译: 一种用于轮询无线局域网(WLAN)中的站的方法,包括以下步骤:获得与站相关的服务质量(QoS)信息; 为需要QoS保证的每个WLAN服务分配两个定时器,一个用于上行链路传输,另一个用于下行链路传输; 当最小定时器Tm低于阈值Tthr时启动受控访问周期(CAP); 用最小定时器轮询站; 发送轮询消息后更新最小定时器; 如果最小定时器Tm大于阈值Tthr,则退出CAP并允许资源争用。

    Vertical handover control algorithm for WLAN and UMTS
    32.
    发明授权
    Vertical handover control algorithm for WLAN and UMTS 有权
    用于WLAN和UMTS的垂直切换控制算法

    公开(公告)号:US07363037B2

    公开(公告)日:2008-04-22

    申请号:US11259661

    申请日:2005-10-26

    IPC分类号: H04Q7/20

    CPC分类号: H04W36/24 H04W36/0083

    摘要: In this invention, a novel vertical handover control algorithm, consisting of a throughput-based mapping function, QoS-based dynamic handover thresholds, and performance-based trigger timers, are proposed to resolve uncommon pilot problem, QoS requirements, and ping-pong effects, respectively. An analytic model based on a finite state machine is developed to evaluate the proposed algorithm in terms of the handover frequency and achievable throughput. A numerical analysis is also provided to further quantify the performance impacts.

    摘要翻译: 在本发明中,提出了一种新颖的垂直切换控制算法,包括基于吞吐量的映射功能,基于QoS的动态切换阈值和基于性能的触发定时器,以解决不常见的导频问题,QoS要求和乒乓效应 , 分别。 开发了基于有限状态机的分析模型,根据切换频率和可实现的吞吐量来评估所提出的算法。 还提供数值分析以进一步量化性能影响。

    Capacity-based compressed mode control method for inter-system handover in universal mobile telecommunication system
    33.
    发明申请
    Capacity-based compressed mode control method for inter-system handover in universal mobile telecommunication system 有权
    通用移动通信系统中系统间切换的基于容量的压缩模式控制方法

    公开(公告)号:US20070258410A1

    公开(公告)日:2007-11-08

    申请号:US11591355

    申请日:2006-11-01

    IPC分类号: H04Q7/00

    CPC分类号: H04W36/0088

    摘要: The Inter-System handover is one of the key features in the third generation cellular systems. The compressed mode, with variable transmission gaps and power levels, is standardized to support the inter-frequency system handover. To minimize the use of system resources while maintaining the border-cell handover quality, a capacity-based compressed mode control method of the present invention is proposed. Considering the tradeoff between the capacity and the communication quality, the control method can adaptively manage the compressed mode operation based on the potential impacts on the capacity and the effectiveness of the compressed mode measurement. The present invention will improve the effectiveness and performance of the compressed mode operation.

    摘要翻译: 系统间切换是第三代蜂窝系统的关键特征之一。 具有可变传输间隙和功率电平的压缩模式被标准化以支持频率间系统切换。 为了最小化系统资源的使用,同时保持边界小区切换质量,提出了本发明的基于容量的压缩模式控制方法。 考虑到容量和通信质量之间的折衷,控制方法可以根据对压缩模式测量的容量和有效性的潜在影响来自适应地管理压缩模式操作。 本发明将提高压缩模式操作的有效性和性能。

    Multi-slope handoff algorithm for controlling dynamic communication quality in wireless communications
    34.
    发明授权
    Multi-slope handoff algorithm for controlling dynamic communication quality in wireless communications 有权
    用于控制无线通信中动态通信质量的多斜率切换算法

    公开(公告)号:US07242936B2

    公开(公告)日:2007-07-10

    申请号:US11109802

    申请日:2005-04-20

    IPC分类号: H04Q7/20

    CPC分类号: H04W36/30 H04W36/08 Y02D70/00

    摘要: A multi-slope handoff algorithm for controlling dynamic communication quality in wireless communications is proposed to let a mobile node adjust the handoff slope according to different communication connection situations for setting the optimum add/drop connection trigger thresholds. The algorithm comprises the following steps. First, a mobile node receives pilot strengths of its service pilot and nearby pilots to produce an aggregate strength. Next, the mobile node determines whether to perform handoff according to the magnitude of the aggregate strength. The handoff action is then controlled by multi-slope handoff operations to set an appropriate slope and to calculate the add/drop connection trigger thresholds when performing handoff. Finally, the pilot to be connected is selected based on the communication quality at that time. In this way, the quality of the communication service can be enhanced, the connection power consumption can be lowered, and the communication channel usage can be reduced.

    摘要翻译: 提出了一种用于控制无线通信中的动态通信质量的多斜率切换算法,以便移动节点根据不同的通信连接情况来调整切换斜率,以设置最佳分插连接触发阈值。 该算法包括以下步骤。 首先,移动节点接收其服务飞行员和附近飞行员的导频强度以产生聚集强度。 接下来,移动节点根据聚合强度的大小来确定是否进行切换。 然后通过多斜率切换操作来控制切换动作,以设置适当的斜率,并在执行切换时计算加/减连接触发阈值。 最后,根据当时的通信质量选择要连接的飞行员。 以这种方式,可以提高通信服务的质量,可以降低连接功率消耗,并且可以减少通信信道的使用。

    Enhanced channel allocation among multiple carriers in a spread spectrum communications system
    36.
    发明授权
    Enhanced channel allocation among multiple carriers in a spread spectrum communications system 失效
    扩频通信系统中多载波之间的增强信道分配

    公开(公告)号:US06611506B1

    公开(公告)日:2003-08-26

    申请号:US09234414

    申请日:1999-01-21

    IPC分类号: H04Q700

    摘要: A method for allocating traffic between multiple carriers in a wireless communications system measures loading on the communication system and selects an appropriate carrier from multiple carriers, based upon the loading measured. A first carrier is selected if the load on the first carrier is lower than or equal to the lowest loading of any supplemental carrier among the multiple carriers. If the load on the first carrier is not lower, then the subscriber may be assigned either to a supplemental carrier or the first carrier. The carrier assignment of the subscriber depends upon a predetermined threshold, which preferably considers actual or estimated differential interference between the first carrier and the supplemental carrier.

    摘要翻译: 一种用于在无线通信系统中的多个载波之间分配业务的方法测量通信系统上的负载,并且基于所测量的负载来选择来自多个载波的适当载波。 如果第一载波上的负载低于或等于多个载波中的任何补充载波的最低负载,则选择第一载波。 如果第一载波上的负载不低,则可将用户分配给辅助载波或第一载波。 用户的载波分配取决于预定阈值,其优选地考虑第一载波​​和辅助载波之间的实际或估计的差分干扰。