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Rank Adaptive Indication Method, Network Elements and Terminals in MIMO System

A self-adaptive, network-side technology, applied in transmission systems, digital transmission systems, diversity/multi-antenna systems, etc., can solve the problem of no way to indicate rank adaptation in MIMO systems, and achieve the effect of improving throughput and performance

Inactive Publication Date: 2017-07-28
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The technical problem to be solved by the present invention is to provide a rank adaptive indication method in a MIMO system, a network element and a terminal on the network side, so as to solve the problem that there is no way for rank adaptive indication in an uplink MIMO system under single grant conditions

Method used

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  • Rank Adaptive Indication Method, Network Elements and Terminals in MIMO System
  • Rank Adaptive Indication Method, Network Elements and Terminals in MIMO System
  • Rank Adaptive Indication Method, Network Elements and Terminals in MIMO System

Examples

Experimental program
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Effect test

Embodiment 1

[0071] This embodiment describes how to perform rank adaptive indication, and the network side performs the following operations:

[0072] Selecting the transmission mode for the MIMO user as single-stream transmission or multi-stream transmission; according to the selection result, configuring the content or transmission mode carried by the Enhanced Rank Indication Channel (E-RICH) for the MIMO user; sending the E-RICH to MIMO users perform rank adaptive indication.

[0073] Specifically, a single-stream or multi-stream transmission is selected for the MIMO user according to the uplink channel conditions of the MIMO user. The multi-stream mode mentioned in this article—the n-stream mode, n≥2, that is to say, the multi-stream mode described herein can be a dual-stream mode, or more than two streams.

[0074] ●If single-stream transmission is selected for MIMO users, the transmission mode of E-RICH can be configured as follows:

[0075] Configure the E-RICH transmission mode ...

Embodiment 2

[0120] This embodiment uses a single user as an example to illustrate how to perform rank adaptive indication. In this embodiment, the transmission mode that the single user can select is single-stream and multi-stream, such as image 3 As shown in , network-side network elements (such as NodeB) perform the following operations:

[0121] Step 301, NodeB determines whether the UE adopts single-stream transmission or multi-stream transmission according to the uplink channel conditions of a certain MIMO user (hereinafter referred to as UE), if it is determined to adopt single-stream transmission, perform step 302, if it determines to adopt multi-stream transmission, perform step 303 ;

[0122] For example, the current UE has multiple antennas and has MIMO transmission capability. The NodeB estimates the uplink channel condition of the UE according to the currently received signals transmitted by the UE on multiple antennas, so as to determine whether the UE uses single stream or ...

application example 1

[0148] This example describes the process of multiplexing a total of 39 channels of E-RICH, E-RGCH and E-HICH of up to 13 uplink MIMO UEs into a single code channel, such as Figure 6 shown.

[0149] The network configures E-RICH for UE#n respectively n 、E-RGCH n and E-HICH n , respectively corresponding to different feature codes, n=1,2,...,13. The network can inform the user of the mapping between the signature and different information through high-level signaling, so that the user can decode the same channelization code but different signature information, so as to determine their own E-RICH, E-RGCH and E-HICH .

[0150] When the number of bits of the uplink MIMO rank adaptation indication information is 1, the E-RICH, E-RGCH and E-HICH channels share a 39-bit orthogonal code sequence. Since the uplink MIMO rank adaptation indication information is 1 bit, each Uplink MIMO users are assigned 3 feature codes (E-RICH, E-RGCH, and E-HICH are each assigned a feature code),...

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Abstract

The invention discloses an adaptive indicating method of a rank in an MIMO (multiple-input multiple-output) system, a network side network element and a terminal, and solves the problem that no way appears in adaptive indication of the rank in an uplink MIMO system under a single authorization condition. The operation carried out by the network side comprises the steps of selecting a transmission mode as single-flow transmission or multi-flow transmission for an MIMO user; configuring the content or the transmission mode loaded by an E-RICH (enhanced rank indication channel) for the MIMO user according to the selection result, and transmitting the E-RICH to carry out adaptive indication of the rank on the MIMO user. The operation carried out by the terminal comprises the steps of: receiving the E-RICH, judging whether the transmission mode is the single-flow transmission or the multi-flow transmission according to the content or the transmission mode loaded by the E-RICH, and carrying out data transmission by corresponding transmission mode. According to the method disclosed by the invention, reasonable transmission of the data can be ensured, and the throughput and the performance of the entire system can be improved.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a rank adaptive indication method, a network element and a terminal in a high-speed uplink packet access (HSUPA) multiple-input multiple-output (MIMO) system of a universal mobile communication system. Background technique [0002] High Speed ​​Uplink Packet Access (HSUPA) is an uplink enhancement technology introduced in 3GPP Release 6, which aims to improve the transmission rate and spectrum utilization of the uplink. Expand further. HSUPA improves the throughput performance of the uplink system by introducing Hybrid Fast Uplink Retransmission (HARQ), uplink scheduling based on the base station (NodeB), and more concise multi-code transmission than the previous version, so that the maximum peak rate of the uplink can reach 5.76 Mbps (Mbps). [0003] A multiple-input multiple-output (MIMO) system is a wireless communication system that simultaneously uses multiple...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L1/18H04B7/06
Inventor 刘俊强杨光张驰刘淑慧常永宇
Owner ZTE CORP
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