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In-order delivery of packet data convergence protocol (PDCP) service data units in downlink during handover

A technology for converging protocols and grouping data, applied in wireless communication, electrical components, etc., can solve the problems that the target eNB does not fully utilize the bandwidth and it is difficult to use fixed values

Active Publication Date: 2010-09-22
QUALCOMM INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Also, since the optimal timer value will depend on many factors (e.g. backhaul load), it may be difficult to use a fixed value
[0018] Furthermore, since the target eNB may keep holding SDUs from the new S1 (until it is certain that no more SDUs are being forwarded from the source eNB), the target eNB may not be fully utilizing the bandwidth in the air when the associated scheduled timer is used

Method used

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  • In-order delivery of packet data convergence protocol (PDCP) service data units in downlink during handover
  • In-order delivery of packet data convergence protocol (PDCP) service data units in downlink during handover
  • In-order delivery of packet data convergence protocol (PDCP) service data units in downlink during handover

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Embodiment Construction

[0038] Various aspects are now described with reference to the drawings. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more aspects. It may be evident, however, that these aspects may be practiced without these specific details.

[0039] As used in this application, the terms "component," "module," "system," etc., are intended to include computer-related entities such as, but not limited to, hardware, firmware, a combination of hardware and software, software, or software in execution . For example, a component may be, but is not limited to being, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and / or a computer. For example, both a program running on a computing device and the computing device can be components. One or more components can reside within a process and / or thread of execution and a component can ...

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Abstract

Systems and methods that manage effects of discarded SDUs during handover. Aspects of the subject innovation maintain order for arrival of PDCP SDUs when a UE encounters a lost PDCP, which has resulted from a dropped SDU at the source eNB - before assignment of an associated PDCP SN. By initially assigning all SDUs corresponding PDCP SNs, a PDCP SN gap or hole can then be encountered upon dropping of a PDCP SDU. To manage PDCP SN gaps or holes thus generated, an internal time out can be designated to terminate an associated UE's delay for such SN hole(s) via a time out. Other aspects enable the source eNB to send a PDCP Status Message to the UE (via the target eNB) to abort the SN gaps or holes resulting from a dropped PDCP SN.

Description

[0001] Claiming Priority Based on 35 U.S.C. §119 [0002] This patent application claims priority to U.S. Provisional Application No. 60 / 976,769, filed October 1, 2007, entitled "IN-ORDERDELIVERY IN DOWNLINK DURING LTE HANDOVER," which is assigned to the recipient of this application, People, are hereby expressly incorporated herein by reference. technical field [0003] This application relates to managing the impact of dropped Service Data Units (SDUs) during handover and maintaining the order of arrival of PDCP SDUs when a UE encounters lost Packet Data Convergence Protocol (PDCP). Background technique [0004] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, data, and so on. These systems may be multiple-access systems capable of supporting communication with multiple users by sharing available system resources (eg, bandwidth and transmit power). Examples of these multiple-access systems include Code D...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/02
CPCH04W36/02
Inventor S·Y·D·何
Owner QUALCOMM INC
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