Method for transmitting special pilot frequency of LTE system

A dedicated pilot and transmission method technology, applied in the field of communication, can solve problems such as dedicated pilot conflicts

Inactive Publication Date: 2008-11-05
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] The present invention proposes a method for sending a dedicated pilot to solve the abov...

Method used

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  • Method for transmitting special pilot frequency of LTE system
  • Method for transmitting special pilot frequency of LTE system
  • Method for transmitting special pilot frequency of LTE system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Embodiment 1, when the system adopts a conventional cyclic prefix and the fourth symbol in the subframe is used for physical downlink control channel transmission, the dedicated pilot is on the seventh, tenth and thirteenth symbols in the subframe send, such as Figure 5 shown;

[0061] The time-domain mapping formula of dedicated pilots to physical resources is as follows:

[0062] l = 3 l ′ = 0 6 l ′ = 1 2 l ′ = 2 ...

Embodiment 2

[0069] When the system adopts the conventional cyclic prefix and the fourth symbol in the subframe is used for the transmission of the physical downlink control channel, the dedicated pilot is sent on the seventh, tenth and thirteenth symbols in the subframe, such as Figure 5 shown;

[0070] The time-domain mapping formula of dedicated pilots to physical resources is as follows:

[0071] l = 3 l ′ = 0 6 l ′ = 1 2 l ′ = 2 ...

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PUM

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Abstract

The present invention provides a special pilot frequency transmission method of the LTE system. When the base station schedules the physical descending control channel and special pilot frequency onto the identical symbol in the sub-frame of the LTE system, the base station only transmits physical descending control channel on the identical symbol. The present invention solves the interfere problem between the physical descending control channel and the special pilot frequency, thereby ensuring the transmission performance of the physical descending control channel.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a method for sending a dedicated pilot in an LTE system. Background technique [0002] The frame structure of the LTE (Long Term Evolution, long-term evolution) system is as follows figure 1 shown. In this frame structure, a 10ms radio frame is divided into two half-frames, each half-frame is divided into 10 time slots with a length of 0.5ms, and two time slots form a subframe with a length of 1ms. It includes 10 subframes (numbered from 0 to 9), and one radio frame includes 20 time slots (numbered from 0 to 19). For the conventional cyclic prefix (Cyclic Prefix, CP) with a length of 5.21μs and 4.69μs, a time slot contains 7 uplink / downlink symbols with a length of 66.7μs, of which the length of the first symbol cyclic prefix is ​​5.21μs, and the remaining 6 The cyclic prefix length of the symbol is 4.69μs; for the extended cyclic prefix whose length is 16.67μs, one time slo...

Claims

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Application Information

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IPC IPC(8): H04B7/26H04Q7/30
Inventor 戴博郝鹏左志松郁光辉
Owner ZTE CORP
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