Multiplexed transmission of data from multiple HARQ processes for a switching operation

A technology of multiplexing and data blocks, applied in the field of multiplexing

Inactive Publication Date: 2015-07-01
BROADCOM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In LTE, since each frame has only a certain number of UL and DL subframes, there is a physical limit on the maximum amount of HARQ processing that can be performed simultaneously by a given user equipment (UE)

Method used

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  • Multiplexed transmission of data from multiple HARQ processes for a switching operation
  • Multiplexed transmission of data from multiple HARQ processes for a switching operation
  • Multiplexed transmission of data from multiple HARQ processes for a switching operation

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Embodiment Construction

[0014] The examples described in detail herein are in the context of an LTE system, but this is only used to provide a practical context to describe the idea of ​​the invention; these teachings can be used in other radio access technologies (RATs) that use automatic Retransmission request processing for the purpose of data retransmission, whether such a RAT uses its entire bandwidth as one carrier or uses multiple aggregated carriers, where individual HARQ processing may not be limited to a single carrier , where the frame UL-DL configuration may change. Various RATs use some form of HARQ concept, and these teachings are readily adaptable to any of the RATs that may also allow HARQ processing when changing the UL-DL configuration.

[0015] Consider two specific examples of LTE where UL-DL reconfiguration can exceed the maximum number of HARQ processes. TDD configuration 1 allows up to 7 HARQ transactions and configuration 0 allows up to 4 HARQ transactions. If there are 6 HA...

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Abstract

A network sends data blocks in a first/n1h radio frame having a first configuration of uplink to downlink transmission time intervals TTIs. Each of these data blocks originate a separate hybrid automatic repeat request HARQ process. The network then frequency or spatially mutliplexes first re-transmissions of at least two of the data blocks in at least one TTI of a sequentially next second/(n+l)st radio frame having a different second configuration of uplink to downlink TTIs. If necessary second re-transmissions of the HARQ processes can also be similarly multiplexed in a TTI of a third/(n+2)nd radio frame sequentially next after the second/(n+l)st frame. In the examples, if frequency domain multiplexing the frequency mutliplexed first re-transmissions are separately scheduled; or if spatial domain multiplexing the spatially mutliplexed first re-transmissions are scheduled with a single physical downlink control channel PDCCH.

Description

technical field [0001] Exemplary and non-limiting embodiments of the present invention relate generally to wireless communication systems, methods, apparatus, and computer programs, and more particularly to switching frames from different uplink / downlink configurations even when switching The HARQ processed data is multiplexed. Background technique [0002] Time Division Duplexing (TDD) enables flexible deployment of radio spectrum without requiring spectrum resources to be paired. In the Long Term Evolution (LTE) of the UTRAN system (LTE is also known as E-UTRAN), TDD deployment allows the number of uplink (UL) and downlink (DL) subframes within a frame with asymmetric frame allocation . More specifically, LTE TDDF provides 7 different UL-DL configurations semi-statically configured that can provide between 40% and 90% of DL subframes. The current mechanism for adapting UL-DL assignments is based on broadcast system information (SI) changes. But the UL-DL configuration ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04
CPCH04L1/1887H04L1/1822H04W72/23H04L1/1812H04W72/044
Inventor 陈涛高春燕韩静洪伟
Owner BROADCOM CORP
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