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Wireless base station device using cooperative HARQ communication method, wireless terminal device, wireless communication system, and wireless communication method

A technology of a wireless communication system and a wireless base station, which is applied in the field of cooperative transmission mode and can solve problems such as residual

Inactive Publication Date: 2011-09-21
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, how to combine new data packets and retransmission data packets in HARQ with cooperative transmission is not disclosed in the above-mentioned prior art, but remains a problem to be solved

Method used

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  • Wireless base station device using cooperative HARQ communication method, wireless terminal device, wireless communication system, and wireless communication method
  • Wireless base station device using cooperative HARQ communication method, wireless terminal device, wireless communication system, and wireless communication method
  • Wireless base station device using cooperative HARQ communication method, wireless terminal device, wireless communication system, and wireless communication method

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Embodiment Construction

[0055] Hereinafter, preferred embodiments will be described in detail with reference to the drawings.

[0056] First, the system network model on which the embodiment is based will be described.

[0057] figure 1 It is an explanatory diagram of the network model on which the embodiment is based.

[0058] Without loss of generality, the network is configured as a packet communication system including two wireless base stations that cooperatively serve wireless mobile terminals (UE: User Equipment) such as a mobile phone terminal. The packet communication system can be realized, for example, as an E-UTRA (Evolved Universal Terrestrial Radio Access) system in the LTE communication standard standardized by 3GPP.

[0059] In LTE and the like, the base station is called eNode-B (evolved Node B). In the following description of this embodiment, the base station is also represented as an eNode-B, or as an eNB whose description is omitted.

[0060] like figure 1 As shown, one of t...

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Abstract

In a transmitter on a supplying eNB side, a first packet transmitting part carries out an operation of transmitting a retransmitted data packet. In a transmitter on a cooperative NB side, on the other hand, a second packet transmitting part carries out an operation of transmitting a novel data packet corresponding to information transferred from the supplying eNB by a packet transfer part. Control information of communication by the supplying eNB and the cooperative eNB to a UE is communicated only through a PUCCH extending from the UE to the supplying eNB and a PDCCH extending from the supplying eNB to the UE. The supplying eNB and the cooperative eNB communicate the novel data packet, the communication control information or the like through an X2 interface.

Description

technical field [0001] The present invention relates to a cooperative transmission technique using distributed antennas. The packet communication technology includes, for example, E-UTRA (Evolved Universal Terrestrial Radio Access) communication technology studied as a next-generation mobile phone communication standard. Background technique [0002] In Spread Spectrum Code Division Multiple Access (CDMA), the following soft handover technology is extensively studied: when a mobile terminal moves from a cell to an adjacent cell, the same signal can be sent and received simultaneously between two base stations, so that Communication is not interrupted. As prior art related to cooperative transmission, for example, the methods described in Patent Document 1 and Non-Patent Document 1 below are disclosed. In these prior arts, cooperative transmission schemes capable of increasing link capacity are disclosed. [0003] Based on the same considerations, a cooperative transmissio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04W92/20
CPCH04L5/0044H04W36/023H04L1/0026H04L1/1887H04W72/044H04L2001/0097H04L1/1812H04L5/0053H04L1/0025H04W36/18H04L1/1896H04L1/18H04W92/20H04W72/20H04L1/1861
Inventor 吴建明
Owner FUJITSU LTD
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