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    • 104. 发明授权
    • Mobile telecommunication
    • 移动电信
    • US07881204B2
    • 2011-02-01
    • US11579790
    • 2004-05-07
    • Johan Torsner
    • Johan Torsner
    • H04L1/00H04L12/28H04L12/56
    • H04L1/1832H04L1/187H04W76/10
    • A node implementing an RLC (Radio Link Control) entity and being for use in a mobile communications system transmits a sequence of RLC SDUs (SDU=Service Data Unit) towards a peer node. As a result of re-establishment of an RLC entity not all SDUs may have been received. The peer notifies the node which is the next SDU that the peer expects to receive (by transmitting the next SDU number to the node). The node resumes transmission from that SDU onwards. This may or may not lead to re-transmission of SDUs transmitted before the RLC re-establishment. As an alternative, the peer does not notify the node of the next SDU that it expects to receive, but instead the node re-transmits any unacknowledged SDUs, together with the SDU number of the first re-transmitted SDU. The peer then discards any duplicate SDUs. Both variants enable lossless data transfer whilst avoiding duplication.
    • 实现RLC(无线电链路控制)实体并且用于移动通信系统的节点向对等节点发送RLC SDU序列(SDU =服务数据单元)。 作为重新建立RLC实体的结果,不是所有的SDU可能已被接收。 对等体通知节点,它是对等体期望接收的下一个SDU(通过向节点发送下一个SDU号码)。 该节点从该SDU向后恢复传输。 这可能导致或可能不导致RLC重新建立之前传输的SDU的重传。 作为替代,对等体不通知其期望接收的下一个SDU的节点,而是节点重新发送任何未确认的SDU以及第一重新发送的SDU的SDU号码。 对等体然后丢弃任何重复的SDU。 这两种变体均可实现无损数据传输,同时避免重复。
    • 107. 发明授权
    • Data packet transmission
    • 数据包传输
    • US07810007B2
    • 2010-10-05
    • US10578655
    • 2004-11-03
    • Christoph Herrmann
    • Christoph Herrmann
    • G06F11/00
    • H04L1/1812H04L1/1832H04L1/187H04L1/1887H04L2001/0096H04L2001/0098
    • Using the attribute “priority” to achieve a stronger Forward Error Correction (FEC) for Radio Link Control (RLC) Control Protocol Data Units (PDUs) transmitted via the High Speed Downlinik Shared Channel (HS-DSCH) also entails prioritized handling so that an RLC Control PDU is likely to overhaul an RLC Data PDU. As a consequence the RLC protocol operation can severely be disturbed, since it relies on in-sequence delivery of control and data PDUs. According to an exemplary embodiment of the present invention, two types of containers are provided in which data packets may be transmitted, wherein the first type of container is provided with a stronger error coding than the second type of container and wherein data packets which comprise control instructions are only transmitted in the first container type with the stronger error correction. Due to this, an improved forward error correction for control PDUs of the AM RLC protocol of Universal Mobile Telecommunications System (UMTS) may be provided.
    • 使用属性“优先级”来实现通过高速下行链路共享信道(HS-DSCH)发送的无线电链路控制(RLC)控制协议数据单元(PDU)的更强的前向纠错(FEC)也需要优先处理, RLC控制PDU可能检索RLC数据PDU。 因此,RLC协议操作可能严重受到干扰,因为它依赖于控制和数据PDU的按顺序传送。 根据本发明的示例性实施例,提供了两种类型的容器,其中可以传输数据分组,其中第一类型的容器具有比第二类型的容器更强的错误编码,并且其中包括控制的数据分组 指令仅在具有较强纠错的第一容器类型中传输。 因此,可以提供对通用移动电信系统(UMTS)的AM RLC协议的控制PDU的改进的前向纠错。
    • 108. 发明申请
    • RETRANSMISSION-REQUEST TRANSMITTING METHOD AND RECEIVING SIDE APPARATUS
    • 重新发送请求发送方法和接收方设备
    • US20100135303A1
    • 2010-06-03
    • US12532718
    • 2008-03-21
    • Anil UmeshAtsushi Harada
    • Anil UmeshAtsushi Harada
    • H04L12/56
    • H04L1/1832H04L1/1628H04L1/1664H04L1/1812H04L1/1848
    • In a retransmission-request transmitting method, the receiving side apparatus activates a reordering timer, when receiving a first packet before receiving an unreceived packet with a sequence number smaller than a sequence number of the first packet; triggers transmission of a retransmission request for the unreceived packet, when having not received the unreceived packet by the time of expiration of the reordering timer activated in response to the receipt of the first packet; and stops and reactivates the reordering timer activated in response to the receipt of the first packet, when a value of the sequence number of the first packet falls out of a range of the receiving side window as a result of changing the upper limit value and the lower limit value in accordance with a sequence number of a second packet received from the transmitting side apparatus.
    • 在重传请求发送方法中,接收侧装置在接收到序列号小于第一分组的序列号的未发送分组之前接收到第一分组时,激活重新排序定时器; 当在响应于接收到第一分组而被激活的重新排序定时器期满时没有接收到未接收分组时,触发对未接收分组的重发请求的传输; 并且当所述第一分组的序列号的值从所述接收侧窗口的范围中移除时,停止并重新激活响应于所述第一分组的接收而被激活的所述重新排序定时器,作为改变所述上限值的结果,并且 根据从发送侧装置接收到的第二分组的序列号,确定下限值。
    • 109. 发明申请
    • COMMUNICATION OVER PLURAL CHANNELS WITH ACKNOWLEDGMENT VARIABILITY
    • 具有确认变量的多个通道的通信
    • US20090319851A1
    • 2009-12-24
    • US12141920
    • 2008-06-19
    • Naizhi Li
    • Naizhi Li
    • G08C25/02G06F11/07
    • H04Q3/0075H04L1/1685H04L1/1832H04L1/1854H04L1/188H04L69/326
    • Reliable communication may be implemented using various underlying transport mechanisms, where the underlying transport mechanisms may be reliable or non-reliable. When data is sent from a source to a destination, the source may sent acknowledgment requests (RACKs) to the destination, and may await acknowledgments (ACKs) from the destination. The RACKs and ACKs are sent over the underlying transport mechanism. The rate at which the data source requests acknowledgments from the destination may be varied, depending on the underlying transport mechanism, to achieve lower overhead and to optimize throughput. For example, RACKs may be sent relatively less frequently when the underlying mechanism implements guaranteed delivery, and may be sent relatively more frequently when the underlying transport does not provide guaranteed delivery.
    • 可以使用各种底层传输机制实现可靠的通信,其中底层传输机制可以是可靠的或不可靠的。 当数据从源发送到目的地时,源可以向目的地发送确认请求(RACK),并且可以等待来自目的地的确认(ACK)。 RACK和ACK通过底层传输机制发送。 数据源从目的地请求确认的速率可以根据底层传输机制而变化,以实现较低的开销并优化吞吐量。 例如,当底层机制实现保证交付时,可以相对较少地发送RACK,并且当底层传输不提供保证传递时,可以相对更频繁地发送RACK。