Uplink synchronous control method and device

A technology of synchronous control and control unit, applied in the directions of synchronous devices, electrical components, wireless communication, etc., can solve the problems of high implementation complexity, inability to accurately adjust the transmission time of different carriers, etc., and achieve the effect of precise adjustment and reduction of processing complexity.

Inactive Publication Date: 2010-11-17
CHINA ACAD OF TELECOMM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Before the TAT times out, the eNB sends an uplink time adjustment instruction to each uplink component carrier, and the UE needs to maintain multiple TATs at the same time, which is very complicated to implement
If LTE-A only maintains one TAT and one TAC, such as taking the average value of the uplink TA of each uplink component carrier, it is impossible to accurately adjust the uplink transmission time of different carriers

Method used

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  • Uplink synchronous control method and device
  • Uplink synchronous control method and device
  • Uplink synchronous control method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0107] The application scenario of Embodiment 1 is: N carriers correspond to N sets of transmitters, and the TAC performs uplink transmission time adjustment based on the carriers. Its uplink synchronization control process is as follows: Image 6 shown, including the following steps:

[0108] Step 601: At regular intervals (less than the TAT time), the base station obtains the uplink transmission time adjustment amount of each uplink component carrier from the physical layer, and according to the uplink transmission time adjustment amount, the base station uses the TA format ( 1), format (4), format (5) or format (6) to construct N TA MAC CEs, or construct a TA MAC CE based on TA format (2) or format (3), and all TA MAC CEs are encapsulated into one transmission piece;

[0109] Step 602: the base station selects a downlink component carrier and sends an adjustment instruction including the transport block to the UE.

[0110] Step 603: After the UE receives the adjustment ins...

Embodiment 2

[0111] The application scenario of the second embodiment is that N carriers correspond to M sets of transmitters (N>M), the base station knows the corresponding relationship between the UE's uplink component carrier and the transmitter, and the TAC performs TA adjustment based on the transmitter. Its uplink synchronization control process is as follows: Figure 7 shown, including the following steps:

[0112] Step 701: every certain time interval (less than TAT time), the base station adjusts the uplink synchronization time based on the UE transmitter:

[0113] If a carrier corresponds to a set of transmitters, the physical layer of the base station measures the carrier directly; if multiple uplink component carriers correspond to a set of transmitters, the uplink time measurements of multiple uplink component carriers supported by the transmitter are selected for averaging , the obtained average value is used as a time adjustment amount for each uplink component carrier supp...

Embodiment 3

[0116] The application scenario of the third embodiment is that N carriers correspond to M sets of transmitters (N>M), and the base station does not know the corresponding relationship between UE carriers and transmitters, and performs measurement based on carriers. Its uplink synchronization control process is as follows: Figure 8 shown, including the following steps:

[0117] Step 801: At regular intervals (less than the TAT time), the base station obtains the uplink time adjustment of each uplink component carrier from the physical layer, and the base station constructs N TA MAC CEs based on TA format (1) for N uplink component carriers or based on TA Format (2) or format (3) constructs a TA MAC CE, and all TA MAC CEs are encapsulated into a TB transmission block;

[0118] Step 802: the base station selects a downlink component carrier to send an adjustment instruction to the UE.

[0119] Step 803: After the UE receives the adjustment instruction, the MAC layer adjusts t...

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Abstract

The invention discloses an uplink synchronous control method. A network side and user equipment (UE) maintain a time aligning timer aiming at UE maintenance, and maintain uplink transmission time adjusted quantity aiming at uplink member carrier waves. The method comprises the following steps: the network side measures aiming at the uplink member carrier waves of the UE to obtain the uplink transmission time adjusted quantity of the uplink member carrier waves; and before the time aligning timer is timeout, the network side sends an adjusting instruction to the UE, wherein, the adjusting instruction comprises the uplink transmission time adjusted quantity information of at least one uplink member carrier wave of the UE. The embodiment of the invention also discloses an uplink synchronous control method at the UE side, and a base station and the UE for realizing the method. The scheme of the invention can realize accurate uplink synchronous adjustment on each member carrier wave under a carrier aggregation mechanism.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to an uplink synchronization control method and device. Background technique [0002] In the 3GPP Long Term Evolution LTE-Advanced (LTE is the abbreviation of Long Term Evolution, it is the evolution system of the third generation mobile communication system, the LTE-Advanced system is an upgrade of the LTE system, abbreviated as LTE-A) system, the peak rate is higher than that of LTE It has been greatly improved, and the peak downlink rate is required to reach 1Gbps, and the peak uplink rate is up to 500Mbps. At the same time, the LTE-A system requires good compatibility with the LTE system. The LTE-A system introduces a carrier aggregation (Carrier Aggregation, CA) technology based on the need to increase the peak rate, be compatible with the LTE system, and make full use of spectrum resources. [0003] The carrier aggregation technology refers to that the uplink an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/00H04W56/00
CPCH04W56/0045H04W92/10
Inventor 王智学李国庆赵毅刘佳敏赵亚利许芳丽
Owner CHINA ACAD OF TELECOMM TECH
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