Feedback enhanced tdd system and air interface, feedback method and terminal access method

A terminal and feedback signal technology, applied in the field of air interface structure and feedback-enhanced air interface, can solve the problems such as the limitation of feedback delay still exists, the difficulty is not alleviated, and the flexibility is not enough, so as to achieve small transmission delay, reduce difficulty, The effect of improving dynamic performance and throughput

Active Publication Date: 2016-12-14
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of the TDD method are: 1) When the coverage area is too large, the spectrum utilization efficiency is lower than that of the FDD method; 2) It is not as good as the FDD method in supporting high-speed mobile
The main disadvantages of FDD are: 1) It requires paired spectrum, which brings difficulties in spectrum planning; 2) It is difficult to use the channel reciprocity feature, which makes the design of smart antennas more difficult; 3) The use of uplink and downlink spectrum is in support Not flexible enough for asymmetric business
[0014] The disadvantages of the No. 200610171582.5 application titled "A Method for Improving the Uplink Feedback Capability of a Time Division Duplex System" and No. 200610171582.5 titled "A Method for Improving the Downlink Feedback Capability of a Time Division Duplex System" are: From the perspective of TDD system evolution, the feedback enhancement method is discussed, but the method of using the FDD spectrum by the TDD feedback enhanced air interface structure evolved from the FDD system is not given; nor is it clearly stated that the TDD feedback enhanced air interface structure brings simplification to spectrum planning and use.
[0015] Therefore, the disadvantages of the currently used hybrid duplex technology are: 1) the limitation of the TDD frame structure on the feedback delay still exists; 2) the limitation of FDD in the ability to support asymmetric services still exists; 4) does not alleviate the difficulties faced in finding and allocating paired spectrum

Method used

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  • Feedback enhanced tdd system and air interface, feedback method and terminal access method
  • Feedback enhanced tdd system and air interface, feedback method and terminal access method
  • Feedback enhanced tdd system and air interface, feedback method and terminal access method

Examples

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no. 1 example

[0046] In this embodiment, a time division duplex system with enhanced feedback is provided.

example 1

[0048] Such as figure 1 As shown, the time division duplex system with enhanced feedback includes at least one base station 101, at least one terminal 102, and a two-way frequency spectrum 103 and a frequency spectrum for a feedback channel used for communication between the base station and the terminal, wherein: the two-way frequency spectrum 103 is based on time division dual The frequency spectrum used in the industrial mode; the spectrum used for the feedback channel includes at least one of the following: the downlink unidirectional spectrum 104 used for the base station to send feedback signals to the terminal, and the uplink unidirectional spectrum 105 used for the terminal to send feedback signals to the base station.

[0049] The unidirectional downlink spectrum 104 is used for the base station 101 to send feedback information to the terminal 102 ; the unidirectional uplink spectrum 105 is used for the terminal 102 to send feedback information to the base station 101 ...

example 2

[0054] Such as figure 2 As shown, on the basis of the system provided in Example 1, the time division duplex system with enhanced feedback further includes a downlink unidirectional frequency spectrum 104' for sending cell synchronization signal 201 (for cell search) and cell broadcast signal 202 (i.e. , the second downlink unidirectional spectrum mentioned above), the downlink unidirectional spectrum 104' and the downlink unidirectional spectrum 104 may be the same segment of spectrum, or may be different spectrums.

[0055] In this way, the base station 101 sends a synchronization signal 201 for cell search to the terminal 102 on the downlink unidirectional spectrum 104', and sends a cell broadcast signal 202 for initial access to the terminal 102 on the downlink unidirectional spectrum 104'.

[0056] In addition, the base station 101 also sends the indication information of the two-way spectrum 103 to the terminal 102 on the downlink one-way spectrum 104', including at lea...

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PUM

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Abstract

The invention discloses a feedback enhanced time division duplex system, comprising at least one base station, at least one terminal, and a bidirectional frequency spectrum and a frequency spectrum for a feedback channel used for communication between the base station and the terminal, wherein the bidirectional frequency spectrum is in a time division duplex manner Spectrum used; the spectrum used for the feedback channel includes at least one of the following: a downlink unidirectional spectrum used for the base station to send feedback signals to the terminal, and an uplink unidirectional spectrum used for the terminal to send feedback signals to the base station. In addition, the invention also discloses a feedback-enhanced air interface, a feedback method, and a terminal access method. By using the present invention, the signal feedback interval can be freed from the limitation of the wireless frame cycle, and the transmission time delay can be reduced and the access speed can be accelerated.

Description

technical field [0001] The present invention relates to the communication field, in particular to an air interface structure and method with an out-of-band feedback channel, in particular to a feedback-enhanced time-division duplex system, a feedback-enhanced air interface, a feedback method, and a feedback-enhanced time-division duplex system. A terminal access method. Background technique [0002] The duplex mode is one of the characteristics that distinguish the traditional wireless system, and it is also a basic factor that determines the basic capabilities of the wireless system. Many performances of the system are closely related to the duplex mode adopted. The above-mentioned performance can be, for example: 1) the system 2) The complexity of terminals and base stations; 3) The ability to use channel information; 4) Networking capabilities; 5) The ability to interoperate between networks; [0003] At present, there are three main duplex modes used in the communicatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W92/10H04W16/12H04B7/26
Inventor 刁心玺
Owner ZTE CORP
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