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Method and apparatus for lowering overhead of uplink scheduling control signaling

A scheduling control and signaling overhead technology, applied in wireless communication, electrical components, etc., can solve the problem of reducing channel utilization

Active Publication Date: 2009-04-01
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The second type of frame structure is as figure 2 As shown, only TDD duplex mode is supported
This method is more efficient, but will result in multiple control channel formats
[0011] Another method is: select the ratio of all uplink and downlink subframes, and set the indication bit in the situation where the required number of bits is the largest. This method only needs to add a control channel format, but reduces the channel utilization.
[0012] In short, in the current LTE TDD system, when the number of uplink subframes is greater than the number of downlink subframes, additional control channel overhead is required to indicate the uplink subframes corresponding to the uplink scheduling control signaling

Method used

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  • Method and apparatus for lowering overhead of uplink scheduling control signaling
  • Method and apparatus for lowering overhead of uplink scheduling control signaling
  • Method and apparatus for lowering overhead of uplink scheduling control signaling

Examples

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Embodiment 1

[0052] In this embodiment, the uplink TTI is set in a fixed configuration manner.

[0053] image 3 It is a specific flow chart of the method for reducing the overhead of uplink scheduling control signaling in Embodiment 1 of the present invention. Such as image 3 As shown, the method includes:

[0054] Step 301 , pre-configuring the setting mode of uplink TTI and the corresponding relationship between uplink TTI and downlink TTI for various ratios of uplink and downlink subframes.

[0055] The setting of uplink TTIs includes setting the number N of uplink TTIs and the uplink subframes included in each uplink TTI, and the number N of uplink TTIs should be less than or equal to the number of downlink TTIs.

[0056] Since the number of downlink TTIs is also different when the proportions of uplink and downlink subframes are different, the setting method of uplink TTIs and the setting of the corresponding relationship between uplink TTIs and downlink TTIs in this embodiment a...

Embodiment 2

[0072] In this embodiment, the uplink TTI is set in a flexible configuration manner.

[0073] Figure 4 It is a specific flow chart of the method for reducing the overhead of uplink scheduling control signaling in Embodiment 2 of the present invention. Such as Figure 4 As shown, the method includes:

[0074] In step 401, the NodeB sets N uplink TTIs according to the ratio of uplink and downlink subframes and service requirements of the current system.

[0075] In this step, setting uplink TTIs includes setting the number N of uplink TTIs and setting uplink subframes included in each TTI. Wherein, when setting the number N of uplink TTIs, it is performed according to the ratio of uplink and downlink subframes of the current system. When setting the uplink subframes included in each uplink TTI, it is done according to the service requirements of the system.

[0076] Specifically, the relationship between the number of uplink and downlink subframes is determined according t...

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Abstract

The invention discloses a method of reducing spending of up scheduling control siganlling, comprising: in a wireless frame, setting N up TTI through combining up sub-frames by a base station Node , setting unique corresponding down TTI for each up TTI, wherein N is smaller than or equal to the number of the down TTI presupposed by the system; transmitting the up scheduling control signalling of each up TTI carried in the down TTI uniquely corresponding in the up TTI; acquiring setting mode of the up TTI and corresponding relation between the up TTI and the down TTI, according to the corresponding relation of N up TTI and the up TTI and the down TTI, extracting the up scheduling control signalling of each up TTI in the receiving down frame, performing resource scheduling. The invention also discloses a base station and a user terminal. According to the invention, control channel availability of the TDD system is increased.

Description

technical field [0001] The invention relates to time-division duplex technology, in particular to a method and device for reducing overhead of uplink scheduling control signaling. Background technique [0002] The third-generation mobile communication system (3G) adopts CDMA multiple access mode, supports multimedia services, and has high competitiveness. In order to ensure that such competitiveness is maintained in a longer period of time, the 3GPP has initiated a research project on Long Term Evolution (LTE) of 3G radio interface technology. [0003] Currently, the LTE system supports two types of frame structures. The first type of frame structure is as figure 1 As shown, two duplex modes are supported: Frequency Division Duplex (FDD) and Time Division Duplex (TDD). Among them, the frame length of a wireless frame is 10 ms, including 20 time slots in total, the time slot marks are from 0 to 19, and the length of each time slot is 0.5 ms. Two consecutive time slots are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/04H04W72/04
Inventor 索士强肖国军唐海王可孙韶辉王映民
Owner DATANG MOBILE COMM EQUIP CO LTD
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