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Information notification and timing advance (TA) obtaining method, system and equipment thereof

A technology of timing advance and information notification, which is applied in the field of information notification and timing advance acquisition, and can solve the problem of not being able to know whether the uplink TA of the cell is the same

Active Publication Date: 2012-05-23
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0030] The embodiment of the present invention provides an information notification method and an information notification device, which are used to solve the problem that the terminal cannot know whether the uplink TA of the cell is the same

Method used

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  • Information notification and timing advance (TA) obtaining method, system and equipment thereof
  • Information notification and timing advance (TA) obtaining method, system and equipment thereof
  • Information notification and timing advance (TA) obtaining method, system and equipment thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0099] In this embodiment, the TA of the newly added cell is different from that of all the current serving cells, and the RRC message is used to notify the information that the uplink TA is different; the details are as follows:

[0100] The UE has aggregated cell 1 and cell 2 for data transmission, and the TAs of the two cells are the same, and cell 1 is the primary cell. Due to the increase or movement of the traffic of the UE, the base station decides to add another aggregated cell, cell 3, for the UE. Since the TA of cell 3 is different from that of cell 1 and cell 2 (probably because cell 3 has passed through RRH or repeater), when configuring cell 3 for UE, the base station notifies UE through RRC dedicated message: the TA of cell 3 and the primary cell The TAs are different; the UE may also be triggered to perform random access on the cell 3 at the same time or later, so that the UE obtains the TA of the cell 3 and completes the uplink synchronization of the cell 3 . ...

Embodiment 2

[0106] In this embodiment, the newly added cell has the same TA as some current serving cells, and the RRC message is used to notify the newly added cell to have the same TA as the current serving cell; details are as follows:

[0107] The UE has aggregated cell 1, cell 2 and cell 3, where cell 1 is the primary cell, cells 1 and 2 have the same TA (called TA1), and cell 3 has another TA (called TA2). At this time, due to the increase or movement of the traffic of the UE, the base station decides to add another aggregated cell (cell 4 ) for the UE. Since the TA of cell 4 is the same as that of cell 1 and cell 2, but different from that of cell 3, when configuring cell 4 for the UE, the base station notifies the UE through an RRC dedicated message that the TA of cell 4 is the same as that of the primary cell. To perform random access in cell 4, only need to use TA1 of the primary cell to perform uplink synchronization directly. The base station can adopt the CHIOCE branch 1 in ...

Embodiment 3

[0110] In this embodiment, system information is used to notify whether the TA of other cells aggregated with the current cell is the same as the TA of the current cell, as follows:

[0111] The base station broadcasts whether the TA of other cells aggregated with the current cell is the same as the current cell in the system information of the cell under its jurisdiction. For example, in the system information of the cell 1, it is included that the TAs of the cell 2 and the cell 4 are the same as those of the cell 1, and the TAs of the cell 3 and the cell 1 are different. Assuming that the UE works in Cell 1 first, the base station adds an aggregated Cell 2 (Cell 1 is the primary cell) for the UE due to increased traffic. Since the UE has learned that the TA of the cell 2 is the same as that of the cell 1 through the system information of the cell 1, when the carrier aggregation transmission of the cell 2 is added, the UE directly uses the TA of the cell 1 to perform the upli...

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Abstract

The embodiment of the invention, which relates to the wireless communication technology field, discloses an information notification and timing advance (TA) obtaining method, a system and equipment thereof. The method, the system and the equipment are used to solve a problem that how a terminal acquires the TA used in uplink transmission on a new added cell when a polymerization cell is added for the terminal. In the invention, the method is characterized in that: a base station sends information which carries a message that whether uplink TAs of a plurality of cells are the same to the terminal; the terminal determines whether the uplink TA of the new added cell configured by the base station for the terminal is the same with the uplink TA of a current service cell TA of the terminal; if the uplink TAs are the same, the current service cell TA is acquired and the TA is taken as the TA used in the uplink transmission performed in the new added cell; otherwise, through initiating a random access process, the TA used in the uplink transmission performed in the new added cell is obtained. Therefore, by using the method, the system and the equipment of the invention, the terminal can obtain the TA used in the uplink transmission performed on the new added cell.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a method, system and equipment for information notification and timing advance acquisition. Background technique [0002] In the long-term evolution (LTE) and previous wireless communication systems, there is only one carrier in a cell, and the maximum bandwidth in the LTE system is 20MHz, such as figure 1 shown. [0003] In the long-term evolution upgrade (LTE-Advanced, LTE-A) system, the peak rate of the system is greatly improved compared with the LTE system, and it is required to reach 1 Gbps in the downlink and 500 Mbps in the uplink. If only one carrier with a maximum bandwidth of 20MHz is used, the peak rate requirement cannot be met. Therefore, the LTE-A system needs to expand the bandwidth that the terminal can use, thus introducing carrier aggregation (Carrier Aggregation, CA) technology, that is, multiple continuous or discontinuous carriers under the same base ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W56/00H04W68/00H04W74/08
Inventor 梁靖赵亚利
Owner DATANG MOBILE COMM EQUIP CO LTD
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