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Method and device for measuring received signal code power (RSCP) of wireless access network system

A technology of signal code power and wireless access network, which is applied in the direction of wireless communication, baseband system components, electrical components, etc., can solve the problems affecting the switching process and reduce the loss, and achieve the effect of small loss

Active Publication Date: 2015-04-29
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Taking these factors into account, it can be found that the actual RSCP value may be reduced by 2.5dB in the worst case, which will obviously affect the handover process

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  • Method and device for measuring received signal code power (RSCP) of wireless access network system
  • Method and device for measuring received signal code power (RSCP) of wireless access network system
  • Method and device for measuring received signal code power (RSCP) of wireless access network system

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Embodiment Construction

[0070] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0071] As we all know, in order to ensure the communication network quality of high-speed railway, to some extent, for TD-SCDMA high-speed network, the transmission power should be greater than -90dBm. Therefore, the noise power is much lower than that of the actual signal. It is easier to estimate the noise first than the actual signal code power.

[0072] For a high-speed railway channel with channel fading and large frequency offset characteristics, the RSCP value will be obviously affected by using the method in the prior art. In order to avoid this influence, the present invention proposes a new RSCP measurement method, the basic idea is to estimate RSCP through actual pilot sequence power and noise power.

[0073] like image 3 As shown, a metho...

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Abstract

The invention provides a method and device for measuring received signal code power (RSCP) of a wireless access network system. The method comprises the following steps: obtaining a power component and the noise power estimated value of a pilot sequence belonging to a primary common control physical channel (P-CCPCH); obtaining a measurement result of the received signal code power (RSCP) according to the power component and the noise power estimated value. By adopting the scheme provided by the invention, the received signal code power (RSCP) is estimated through the power component and the noise power of the actual pilot sequence, the improvement of about 1 dB can be obtained in a large-frequency offset scene, and the loss is smaller in comparison with theoretic values at different transmission power levels.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and device for measuring RSCP (Received Signal Code Power) of a high-speed railway wireless access network system (TD-SCDMA system). Background technique [0002] As we all know, for mobile communication systems, measurement is essential, and among all measurement items, RSCP is the most important one. It factors in many physical layer procedures such as handover and cell selection / reselection. [0003] For TD-SCDMA system, RSCP is calculated by the code power of P-CCPCH (Primary Common Control Physical Channel), and P-CCPCH is positioned as the first two TS#0 physical code channels. Theoretically, for a linear system, the code power of the pilot sequence and the power of the channel estimation result are the same. Therefore, in the implementation process, the RSCP measurement result can be calculated through the channel estimation results of the first two codes (code...

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Application Information

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IPC IPC(8): H04W24/00H04L25/02
Inventor 庄亮黄珍
Owner TELEFON AB LM ERICSSON (PUBL)