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Data transmission method and apparatus thereof

A data transmission method and data transmission technology, applied in the field of data transmission methods and devices, can solve the problems of not giving clear regulations and the like

Active Publication Date: 2012-06-27
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current technology for the processing of uplink / downlink collision subframes has not given clear regulations.

Method used

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  • Data transmission method and apparatus thereof
  • Data transmission method and apparatus thereof
  • Data transmission method and apparatus thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0152] Embodiment 1: The available subframe is the subframe of the physical downlink control channel PDCCH. The PDCCH subframe is a DL subframe or DwPTs, and includes PDCCH or E-PDCCH or R-PDCCH.

[0153] For onDurationtimer, drx-InactivityTimer, drx-RetransmissionTimer, the length statistics can be in the following ways:

[0154] Method 1: Perform statistics according to the union or intersection of PDCCH subframes in all cells aggregated by the UE, without considering uplink / downlink collision subframes at all, or if the uplink / downlink collision subframes are used for DL ​​data transmission, then the subframes are also It can be used as PDCCH subframe statistics.

[0155] Taking the union of PDCCH subframes of all cells aggregated according to UE as an example, it is first necessary to determine the PDCCH subframes of each cell. If the uplink / downlink collision subframe is not considered at all, then the PDCCH subframe on each cell is the downlink subframe or DwPTS subfra...

Embodiment 2

[0161] Embodiment 2: The available subframe is the available subframe of Msg1 in the non-contention random access process.

[0162] Assume that the user equipment first establishes an RRC connection with the base station on Cell2 (that is, Cell2 is a PCell). Due to the UL data transmission requirements, the base station needs to add an SCell (that is, Cell1) for the user equipment. Since the SCell and PCell are not in the same TAG, the base station needs to be on Cell2 Sending a PDCCH order (order) on Cell1 triggers random access on Cell1, assuming that the receiving time of PDCCH order on Cell2 is: radio frame number (SFN)=N, subframe number n=8, then the user equipment can meet the following two conditions Conditional uplink subframes send Msg1:

[0163] Condition 1: The subframe number satisfies: n+k 2 , where k 2 ≥6.

[0164] Condition 2: The uplink subframe on the cell sending the Msg1 is a non-uplink / downlink collision subframe or an uplink / downlink collision subframe...

Embodiment 3

[0167] Embodiment 3: The available subframe is the available subframe of Msg3 in the contention random access process.

[0168] Assume that the user equipment first establishes an RRC connection with the base station on Cell2 (that is, Cell2 is a PCell). Due to the UL data transmission requirements, the base station needs to add an SCell (that is, Cell1) for the user equipment. Since the SCell and PCell are not in the same TAG, the base station needs to be on Cell2 Sending a PDCCH order on Cell1 triggers random access on Cell1, assuming that the moment when the user equipment receives Msg2 on Cell1 is: SFN=N, subframe number n=0.

[0169] Case 1: If the UL delay field is set to 0, then the user equipment can send Msg3 in the first uplink subframe that meets the following two conditions:

[0170] Condition 1: The subframe number satisfies: n+k 1 (k 1 ≥6).

[0171] Condition 2: The uplink subframe on the cell sending Msg3 is a non-uplink / downlink collision subframe or an upli...

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Abstract

The invention discloses a data transmission method and an apparatus thereof which are used to improve a data transmission processing scheme when a plurality of cells in which user equipment (UE) is polymerized possess different time division duplex (TDD) up-link (UL) / DL configurations. The method comprises the following steps that: when the TDD UL / DL configurations of a plurality of cells in which the UE is polymerized are different and a UL / DL collision subframe only allows single direction data transmission, the UE determines the data transmission direction allowed by the UL / DL collision subframe, wherein in the TDD UL / DL configurations of a plurality of cells in which the UE is polymerized, transmission directions of the data from a same UL / DL collision subframe are different; the UE determines an available subframe which is used at the UL data transmission direction and the available subframe which is used at the DL data transmission direction in the each polymerized cell, wherein the available subframe that is calculated at the data transmission direction which is opposite to the allowed data transmission direction does not comprise the UL / DL collision subframe; the UE carries out data transmission through the available subframe.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a data transmission method and device. Background technique [0002] The peak rate of the Long Term Evolution (LTE-A) system is greatly improved compared with that of the Long Term Evolution (LTE), and it is required to reach 1 Gbps in the downlink and 500 Mbps in the uplink. At the same time, the LTE-A system requires good compatibility with the LTE system. The LTE-A system introduces a carrier aggregation (Carrier Aggregation, CA) technology based on the need to increase the peak rate, be compatible with the LTE system, and make full use of spectrum resources. [0003] The carrier aggregation technology enables user equipment to work on multiple cells at the same time. A cell contains a pair of UL / DL component carriers (Component Carriers, CCs), instead of only one set of carriers in the LTE system and previous wireless communication systems. In the carrier agg...

Claims

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Application Information

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IPC IPC(8): H04W74/08
CPCH04W72/02H04L5/14H04B7/2643H04W74/08H04L5/0073H04L5/001H04L5/1469H04W74/085
Inventor 赵亚利许芳丽
Owner DATANG MOBILE COMM EQUIP CO LTD
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