Method and device for adjusting timing advance in uplink multipoint reception

A technology of timing advance and advance, which is applied in the field of communication and can solve problems such as interference and signal error demodulation

Inactive Publication Date: 2010-09-22
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, the signal from the terminal may not only be wrongly demodulated, but also become an interference

Method used

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  • Method and device for adjusting timing advance in uplink multipoint reception
  • Method and device for adjusting timing advance in uplink multipoint reception
  • Method and device for adjusting timing advance in uplink multipoint reception

Examples

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no. 1 Embodiment

[0055] Figure 4 is a diagram showing a signaling flow according to the first embodiment of the present invention.

[0056] Such as Figure 4As shown, the method for adjusting the timing advance of the uplink in a communication system composed of a mobile terminal and multiple base stations according to the first embodiment of the present invention is as follows: firstly, each base station eNB1, eNB2 and eNB3 respectively measure the mobile The channel delays T(1, 1), T(1, 2) and T(1, 3) from the terminal UE1 to each base station eNB1, eNB2, eNB3, and the channel response power P(1, 1), P(1 , 2) and P(1, 3); then, the measured channel delays T(1, 1) and T(1, 3) and power P(1, 3) are reported by the non-serving base stations eNB1 and NB3 to the serving base station eNB2 1) and P(1, 3); Next, the serving base station eNB2 determines the uplink timing advance of the mobile terminal according to the received delay and power information and the channel delay and power information...

no. 2 Embodiment

[0069] A possible problem in the first embodiment is the signaling overhead when the non-serving base station reports delay and power information to the serving base station. Firstly, the method according to the embodiment of the present invention needs to transmit extra power information between base stations, which increases the signaling overhead; secondly, since the timing advance is updated periodically, the increased signaling overhead increases the system burden. In order to improve the above problems, the following embodiments are proposed to reduce signaling overhead from information transfer between base stations, and at the same time achieve beneficial effects of the present invention.

[0070] Figure 7 is a diagram showing a signaling flow according to the second embodiment of the present invention.

[0071] Such as Figure 7 As shown, the method for adjusting the uplink timing advance according to the second embodiment of the present invention may be as follows...

no. 3 Embodiment

[0079] Figure 8 is a diagram showing a signaling flow according to the third embodiment of the present invention.

[0080] Such as Figure 8 As shown, the method for adjusting the uplink timing advance according to the third embodiment of the present invention may be as follows: in step ①, the transmitting and receiving unit 604-2 of the serving base station eNB2 satisfies a predetermined condition (which may be as described later In the case of the threshold judgment condition of step ⑤ in the fifth embodiment—threshold exceeds?), all channel delay and power information are notified to the non-serving base stations eNB1 and eNB3. Here, the transmitting and receiving unit 604-2 of the serving base station eNB2 notifies the non-serving base station of the channel delay and power information stored in advance in all relevant base stations, that is, notifies the non-serving base station eNB1 of the channel delay T(1,2 ) and T(1, 3), and the channel response power T(1, 2) and T...

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Abstract

The invention provides a method and a device for adjusting timing advance in a communication system consisting of a mobile terminal and a plurality of base stations. The method comprises the following steps: the plurality of the base stations respectively measure channel delay from the mobile terminal to the plurality of the base stations as well as power of channel response; non-service base stations in the base stations reports the measured channel delay and power to service base stations; and the service base stations determines the timing advance of the uplink of the mobile terminal according to the received channel delay and the power as well as the channel delay and the power measured by the service base stations, and informs the mobile terminal about the timing advance. By adopting the method and the device, the available power received by the uplink base stations can be optimized, and the interference power can be effectively lowered.

Description

technical field [0001] The invention relates to the technology of uplink synchronization and uplink multi-base station cooperation in the communication field. More specifically, it relates to adjustment of timing advance in uplink multipoint reception in a mobile communication system. Background technique [0002] For the uplink of a wireless communication system based on Orthogonal Frequency Division Multiplexing (OFDM) or Time Division Multiplexing (TDMA), there is a receiving time window. For an OFDM system, this time window is a cyclic prefix (Cyclic Prefix), and for a time division multiplexing system, this time window is a guard interval (guard interval). Only when the transmitted signal of the terminal arrives at the base station within the time window can it be correctly received and demodulated, otherwise the arriving signal will become interference, thereby degrading the performance of the uplink. [0003] However, in the uplink, there is a transmission delay fro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/12H04W24/10H04B1/707H04B7/26
CPCH04W56/00Y02B60/50H04W56/0045Y02D30/70
Inventor 张治徐明星野正幸今村大地西尾昭彦三好宪一
Owner PANASONIC CORP
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