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Method and device for indicating TD-LTE terminal to receive downlink pilot time slot

A pilot time slot and terminal receiving technology, applied in electrical components, wireless communication, etc., can solve problems such as incomplete data and too late for terminals to process DwPTS, and achieve the effect of avoiding receiving conflicts

Inactive Publication Date: 2013-10-30
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the changeable wireless environment, the following situations may occur: the TA (Timing Advance) value received by the user will cause the UpPTS sent by the terminal to exceed the GP and overlap with the DwPTS, resulting in the terminal either not being able to process the DwPTS in time, or sending uplink data. whole

Method used

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  • Method and device for indicating TD-LTE terminal to receive downlink pilot time slot
  • Method and device for indicating TD-LTE terminal to receive downlink pilot time slot
  • Method and device for indicating TD-LTE terminal to receive downlink pilot time slot

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] This embodiment describes how the network side instructs the terminal to receive DwPTS, such as figure 2 shown, including the following steps:

[0041] Step 110, judging that if the TA value in the message sent to the TD-LTE terminal is greater than the preset maximum TA threshold value, then perform step 120;

[0042] Preferably, before step 110, the processing indication is first broadcast to the TD-LTE terminal, which is used to inform the TD-LTE terminal that the current cell supports the DwPTS deactivation indication. This step can be omitted when both the network and the terminal support the DwPTS shutdown indication by default.

[0043] Step 120, carrying a close indication in the message, the close indication is used to instruct the TD-LTE terminal to close the reception of the DwPTS;

[0044] Step 130, setting the network side not to schedule the physical downlink shared channel (PDSCH) for the terminal in the DwPTS.

[0045] The above step 120 and step 130...

Embodiment 2

[0053] This embodiment describes how the terminal receives DwPTS, such as Figure 6 shown, including the following steps:

[0054] Step 210, receiving a message carrying a TA value;

[0055] Preferably, before receiving the above message, a processing instruction sent by broadcast is also received, and the processing instruction is used to notify the current cell to support the DwPTS deactivation instruction. This step can be omitted when both the network and the terminal support the DwPTS shutdown indication by default.

[0056] In step 220, it is determined that if the message carries a shutdown instruction, the reception of the DwPTS is disabled, uplink synchronization is performed according to the TA value, and uplink data is sent.

[0057] If the terminal judges that the message carries an enabling instruction, it enables the reception of the DwPTS.

[0058] The above message includes: RAR message or TA control element message or newly added MAC control element message...

Embodiment 3

[0060] This embodiment introduces the network-side device implementing the method in Embodiment 1, such as Figure 7 As shown, including: judging module, sending module and setting module, wherein:

[0061] The judging module: used to judge whether the TA value in the message sent to the TD-LTE terminal is greater than a preset maximum TA threshold value;

[0062] The sending module is configured to carry a closing indication in the message when the judging module judges that the TA value in the message sent to the TD-LTE terminal is greater than the preset maximum TA threshold value, and the closing indication is used to indicate the TD -The LTE terminal closes the reception of DwPTS;

[0063] The setting module is configured to set the network side not to schedule the physical downlink shared channel for the terminal in the DwPTS after the sending module sends the shutdown instruction.

[0064] Preferably, the above-mentioned sending module is also used for: when the judgi...

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Abstract

The invention discloses a method and device for indicating a TD-LTE terminal to receive a downlink pilot time slot. The method and device is used for avoiding a conflict of uplink UpPTS transmitting of the TD-LTE terminal and DwPTS receiving of special subframes. The method includes the steps that if a TA value in a message sent to the TD-LTE terminal is larger than the maximum preset TA threshold value, a close instruction is carried by the message, a network side is absent from a physical downlink shared channel used for the TD-LTE terminal and dispatched by DwPTS, and the close instruction is used for indicating the TD-LTE terminal to close the receiving of the DwPTS. The device comprises a judgment module, a transmitting module and a setting module. According to the method and device, the terminal can determine whether the receiving of the DwPTS is closed in advance according to instructions in RAR and TACE sent by a network, and therefore the situation of the conflict of the transmitting of the UpPTS and the receiving of the DwPTS is avoided.

Description

technical field [0001] The mobile communication system of the present invention specifically relates to an LTE (Long Term Evolution, long-term evolution) TDD (Time Division Duplexing, time division duplex) system instructing a TD-LTE (Time Division Long Term Evolution, time-division long-term evolution) terminal to receive a DwPTS (downlink Pilot time slot) method and device. Background technique [0002] The frame structure of LTE TDD mode is as follows figure 1 As shown, the type 2 wireless frame structure is adopted. Each 10ms wireless frame is composed of two half frames with a length of 5ms. Each half frame is 5ms long and consists of 4 data subframes and 1 special subframe, of which 4 A data subframe occupies 8 regular time slots, and a special subframe includes three special time slots, DwPTS (downlink pilot time slot), GP (guard time slot) and UpPTS (uplink pilot time slot), with a total length of 1ms. The lengths of DwPTS and UpPTS are configurable. The length of...

Claims

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Application Information

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IPC IPC(8): H04W72/12H04W88/02
Inventor 仲华
Owner ZTE CORP
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