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Terminal apparatus and retransmission control method

A terminal device, retransmission control technology, applied to the separation device of the transmission path, error prevention/detection through transmission repetition, power management, etc., can solve the problem of being unable to determine whether the control information is sent to the local machine, etc., to achieve The effect of cutting costs

Active Publication Date: 2012-04-11
OPTIS WIRELESS TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, until the terminal tries to deblock the CRC part of the received control information with its own terminal ID, it cannot determine whether it is control information addressed to itself.

Method used

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  • Terminal apparatus and retransmission control method
  • Terminal apparatus and retransmission control method
  • Terminal apparatus and retransmission control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0085] [Outline of communication system]

[0086] In a communication system including a base station 100 and a terminal 200 described later, communication using an uplink component frequency band and a plurality of downlink component frequency bands associated with the uplink component frequency band is performed, that is, the terminal 200 alone uses asymmetric carrier aggregation. communication. In addition, in this communication system, unlike the terminal 200, it does not have the capability of performing communication based on carrier aggregation, but performs communication based on a downlink component frequency band and an uplink component frequency band correspondingly associated with it (that is, not based on communication with carrier aggregation).

[0087] Therefore, the base station 100 adopts a configuration capable of supporting both communication based on asymmetric carrier aggregation and communication not based on carrier aggregation.

[0088] In addition, be...

Embodiment approach 2

[0180] In Embodiment 1, when the base station 100 transmits one piece of downlink data (TB) to the destination terminal 200 , it is necessary to map the downlink data to the basic component frequency band for the destination terminal 200 . In Embodiment 2, in terms of allowing the base station 100 to place downlink data only outside the basic component frequency band for the transmission destination terminal 200, and in the downlink allocation control information of the downlink component frequency bands other than the basic component frequency band , including a bit (Anchor Assignment Indicator, AAI) indicating whether downlink data is also included in the basic component frequency band (that is, whether downlink allocation control information for the terminal 200 is transmitted through the basic component frequency band) This point is different from Embodiment 1. That is, in Embodiment 2, it is possible to switch modes between the first mode and the second mode, wherein the ...

Embodiment approach 3

[0201] In Embodiments 1 and 2, the case where the terminal transmits only a response signal to downlink data to the base station has been described. However, the base station may instruct the terminal to transmit uplink data in the same subframe in which the terminal transmits the response signal. Embodiment 3 differs from Embodiments 1 and 2 in that the terminal receives an instruction from the base station to also transmit uplink data in a subframe in which the terminal should transmit a response signal.

[0202] [Structure of base station]

[0203] Figure 9 It is a block diagram showing the configuration of base station 300 according to Embodiment 3 of the present invention. exist Figure 9 Among them, the base station 300 includes a control unit 301 , a control information generation unit 302 , a mapping unit 309 , a PUCCH / PUSCH separation unit 320 , an IDFT unit 321 , and a demodulation / decoding unit 322 .

[0204] The control unit 301 allocates downlink resources fo...

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PUM

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Abstract

A terminal apparatus and retransmission control method which can reduce the overhead of the uplink control channel in cases when ARQ is applied in communication that uses an uplink unit band and a plurality of downlink unit bands associated with the uplink unit band. Here, a first condition is set in which downlink assignment control information is transmitted from a base station by a unit band group which comprises a basic unit band, which is the downlink unit band on which a broadcast channel signal including information relating to the uplink unit band is transmitted, and a second downlink unit band other than the basic unit band. A bundling unit (213) will not transmit a response signal to the base station (100) in cases when the first condition is satisfied and a control information receiving means has failed in receiving all of the downlink assignment control information transmitted by the basic unit band and second downlink unit band, and in cases when the first condition is satisfied and the control information receiving means has succeeded in receiving only the downlink assignment control information transmitted by the second downlink unit band.

Description

technical field [0001] The present invention relates to a terminal device and a retransmission control method. Background technique [0002] In 3GPP LTE (3rd Generation Partnership Project Long Term Evolution, 3rd Generation Partnership Project Long Term Evolution), OFDMA (Orthogonal Frequency Division Multiple Access, Orthogonal Frequency Division Multiple Access) is adopted as a downlink communication method. In a wireless communication system to which 3GPP LTE is applied, a base station transmits a synchronization signal (Synchronization Channel, SCH) and a broadcast signal (Broadcast Channel, BCH) using predetermined communication resources. Then, the terminal first secures synchronization with the base station by capturing the SCH. Thereafter, the terminal acquires parameters unique to the base station (for example, bandwidth, etc.) by reading the BCH information (see Non-Patent Documents 1, 2, and 3). [0003] In addition, the terminal establishes communication with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/04
CPCH04L5/0053H04L1/1607H04L1/1861H04W28/04H04L5/001H04L5/0055H04L5/0016H04L5/0094H04L1/1657H04L1/16H04L1/1621H04W52/22H04W74/006H04W24/04H04W8/08H04W52/262H04W72/21H04W72/23H04H20/71H04L1/08H04L5/0007H04W84/042
Inventor 中尾正悟西尾昭彦今村大地
Owner OPTIS WIRELESS TECH LLC