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Information transmission method on E-HICH in two-user MIMO system

A technology for sending information and users, which is applied in the field of information transmission, and can solve problems such as UE being unable to distinguish signature sequences and unable to receive ACK/NACK information correctly

Inactive Publication Date: 2013-05-29
TD TECH COMM TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] When two-user MIMO is used in the uplink, the E-PUCH physical resources allocated to the two users may be completely or partially overlapped, and they are distinguished by different carriers. In this way, for two users occupying the same physical resources, the network The signature sequences calculated by the side are the same. If the same E-HICH is still used to carry the signature sequences of the two users occupying the same physical resources, these UEs will not be able to distinguish which is their own signature sequence, resulting in UE cannot receive ACK / NACK information correctly

Method used

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  • Information transmission method on E-HICH in two-user MIMO system
  • Information transmission method on E-HICH in two-user MIMO system
  • Information transmission method on E-HICH in two-user MIMO system

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Embodiment 1

[0030] In this embodiment, when the E-PUCH physical resource is allocated to the user, the spreading factor of the allocated channelization code is less than 16, that is, the spreading factor is selected among 1, 2, 4 and 8.

[0031] When two-user MIMO is used in the uplink, the physical resources occupied by the E-PUCH of the two users are divided as follows: a) the last time slot is the same and the channelization code number is the same; b) other cases except a), that is, the last One time slot is the same but the channelization code is different; the last time slot is different but the channelization code is the same; the last time slot is different and the channelization code is also different. For scenario b), the serial numbers of signature sequences calculated by formula (1) are different, so there will be no collision of signature sequences. For scenario a), that is, when the last time slots of the E-PUCH physical resources allocated to the two users constituting Virt...

Embodiment 2

[0040] In this embodiment, if the two users constituting the Virtual MIMO are allocated the same E-PUCH physical resources, when the corresponding ACK / NACK information is sent to the two users through the E-HICH, the ACKs of the two users / NACK information is sent on E-HICHs with different sequence numbers.

[0041] Through the above method, the two users allocated the same resources will not transmit ACK / NACK information on the same E-HICH, and there will be no situation where the signature sequence is the same on the same E-HICH, so it can ensure that the users are correct Receive own ACK / NACK information.

Embodiment 3

[0043] In this embodiment, in the uplink two-user MIMO, a scenario in which the last time slots of the E-PUCH physical resources allocated to the two users constituting the Virtual MIMO are the same and the channelization code numbers are also the same is avoided during downlink scheduling. That is to say, when allocating E-PUCH physical resources to users, the last time slots or channelization codes of the allocated physical resources of two users constituting Virtual MIMO are different, and ACK / NACK is performed in the existing way Sending information means determining the ACK / NACK information of the user, and sending the ACK / NACK information to the user through the E-HICH using the corresponding signature sequences of the two users.

[0044] Through the method in this embodiment, when performing E-PUCH physical resource allocation, the signature sequence collision caused by the physical resources allocated to the user is avoided, thereby fundamentally eliminating the transmi...

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Abstract

The invention discloses an information transmission method on an E-HICH. In a two-user MIMO system, while dispatching ACK / NACK information to users through the E-HICH, for the two users distributed with the same E-PUCH physical resource, the ACK / NACK information of the users is transmitted on different E-HICHs; or for the two users of which ACK / NACK information is transmitted on the same E-HICH, different signature sequences are adopted; or while distributing the E-PUCH physical resources, the last time slots or the channelization codes of the distributed physical resources of the two users are different. In the method, while transmitting the ACK / NACK information, the two users forming Virtual MIMO can distinguish the respective ACK / NACK information so as to receive the information correctly.

Description

technical field [0001] The invention relates to an information transmission method in a TD-SCDMA system, in particular to an information transmission method on E-HICH in a two-user multiple-input multiple-output (MIMO) system. Background technique [0002] In the TD-SCDMA system, in order to improve the uplink transmission performance, the uplink will adopt multi-user (MU) MIMO technology. [0003] When MU MIMO is not used in the uplink, when performing uplink data transmission, the information transmission process between the network side and the UE includes: [0004] The network side allocates E-PUCH physical resources (time slot resources and code resources) for the user, and sends the allocated resources to the UE through the E-AGCH; [0005] The UE receives the allocated E-PUCH physical resources from the E-AGCH, and transmits uplink data to the network side on the physical resources; [0006] The network side receives the uplink data of the UE from the physical resou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/00H04L1/00H04L1/16H04B7/06H04W72/04
Inventor 景卓
Owner TD TECH COMM TECH LTD
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