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    • 1. 发明授权
    • Hierarchical downlink scheduler for a processed satellite payload
    • 经处理的卫星有效载荷的分层下行链路调度器
    • US06738346B1
    • 2004-05-18
    • US09270356
    • 1999-03-16
    • Jaime L. Prieto, Jr.Jason R. Kincaid
    • Jaime L. Prieto, Jr.Jason R. Kincaid
    • H04J1500
    • H04B7/1858
    • A downlink scheduler (20) is provided for scheduling the downlink transmission of data cells in a spot beam processing satellite (12). The downlink scheduler (20) includes a beam selector (48) for selecting one of the spot beams associated with the satellite (12), a plurality of wholesale selectors (50) for selecting one of a plurality of wholesalers, such that each of the wholesale selectors (50) is associated with one of the spot beams, and a plurality of retail selectors (52) for selecting one of a plurality of retail connections, such that each of the retail selectors (52) is associated with one of the wholesalers. Each of the selectors may use a packet fair queuing (PFQ) method to make its selection. The downlink scheduler (20) then passes at least one data cell from a selected retail connection to a downlink modulator (24), thereby scheduling the downlink transmission of data cells in the satellite.
    • 提供下行链路调度器(20),用于调度点波束处理卫星(12)中的数据信元的下行链路传输。 下行链路调度器(20)包括用于选择与卫星(12)相关联的点波束中的一个的波束选择器(48),用于选择多个批发商之一的多个批发选择器(50),使得每个 批发选择器(50)与一个点光束相关联,以及多个零售选择器(52),用于选择多个零售连接中的一个,使得每个零售选择器(52)与批发商中的一个相关联 。 每个选择器可以使用分组公平排队(PFQ)方法进行选择。 下行链路调度器(20)然后将至少一个数据信元从选定的零售连接传递到下行链路调制器(24),从而调度卫星中的数据信元的下行链路传输。
    • 2. 发明授权
    • Onboard control of demand assigned multiple access protocol for satellite ATM networks
    • 卫星ATM网络的需求分配多址协议的板载控制
    • US06381228B1
    • 2002-04-30
    • US09232155
    • 1999-01-15
    • Jaime L. Prieto, Jr.Jason R. Kincaid
    • Jaime L. Prieto, Jr.Jason R. Kincaid
    • H04B7212
    • H04B7/2123H04B7/18582H04L2012/5608H04Q11/0478
    • An onboard DAMA protocol for use in connection with a processing satellite communications network, where multiple users are assigned to a common transmission resource as part of a sharing set. A media access controller (30) on the satellite maintains a reservation log which identifies the frequencies and number of uplink time slots in the resource that are currently reserved by one or more members of the sharing set. To reserve a time-frequency slot on the transmission resource for a non-contentious transmission of data, a user of the sharing set will transmit a reservation request to the satellite on a contentious uplink resource. If a return message is not received, the user knows that the reservation request collided with another reservation request, and a retransmission strategy of the reservation request is employed. When the media access controller (30) receives the reservation request, it decides whether to grant, deny or delay the request based on the service and price class of the user, the amount of data already sent by the user, the number and type of other users with reservation requests in the queue, and the congestion state of the destination downlink port and subsequent nodes in the network. When the user receives a reservation grant message from the media access controller (30) on the satellite in the downlink, it will then wait for its reservation time frequency slot, and transmit its data in a non-contentious basis on the transmission resource at that time. If the user needs additional bandwidth to transmit more data, it may piggyback a reservation request on the data transfer.
    • 一种用于与处理卫星通信网络相结合使用的机载DAMA协议,其中多个用户被分配给共享传输资源作为共享集合的一部分。 卫星上的媒体接入控制器(30)维护一个预约日志,该预约日志标识当前由共享集合的一个或多个成员保留的资源中的上行链路时隙的频率和数量。 为了在传输资源上保留用于非有争议的数据传输的时隙,共享集合的用户将在有争议的上行链路资源上向卫星发送预留请求。 如果未接收到返回消息,则用户知道预约请求与另一个预留请求冲突,并且采用预约请求的重传策略。 当媒体接入控制器(30)接收到预约请求时,它决定是否根据用户的服务和价格等级来准许,拒绝或延迟请求,用户已经发送的数据量, 在队列中具有预留请求的其他用户,以及网络中目的地下行链路端口和后续节点的拥塞状态。 当用户从下行链路中的卫星上的媒体接入控制器(30)接收到预约许可消息时,它将等待其预留时隙,并在该传输资源上以非争用的方式发送其数据 时间。 如果用户需要额外的带宽来传输更多数据,则可能会在数据传输上搭载预留请求。