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Method, system and device for transmitting secondary synchronization signals by introducing uplink time slot to downlink

A technology of auxiliary synchronization signal and time slot, applied in the field of communication, can solve problems such as time extension and complicated random access channel process, and achieve the effect of reducing the steps of adjusting transmission power

Active Publication Date: 2011-03-30
CHINA MOBILE COMM GRP CO LTD
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Problems solved by technology

[0013] In the prior art, since the terminal cannot accurately obtain the uplink channel loss before randomly accessing the channel, and then determine the transmit power of the RACH Access Preamble, it needs to trigger the Power Ramping process multiple times to adjust the transmit power, making the random access channel process complicated and time-consuming extend

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  • Method, system and device for transmitting secondary synchronization signals by introducing uplink time slot to downlink
  • Method, system and device for transmitting secondary synchronization signals by introducing uplink time slot to downlink
  • Method, system and device for transmitting secondary synchronization signals by introducing uplink time slot to downlink

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Embodiment Construction

[0052] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments in the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the embodiments of the present invention.

[0053] An embodiment of the present invention provides a method for introducing a secondary synchronization signal for downlink transmission in an uplink time slot, which is applied in a TD-LTE system including a terminal and a base station. The method is as follows: Figure 5 shown, including the following steps:

[0054] Step 501, the base station adds a secondary synchronization signal to the last symbol of every 5 ...

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Abstract

The embodiment of the invention discloses a method for transmitting secondary synchronization signals by introducing an uplink time slot to downlink, which is applied to a time division-long term evolution (TD-LTE) system comprising a terminal and a base station, and comprises the following steps: the terminal receives the secondary synchronization signals from the base station in a downlink special time slot of an uplink channel; the terminal calculates the transmitting power according to the secondary synchronization signals; and the terminal transmits access lead codes of a random access channel (RACH) to the base station according to the transmitting power, and carries out the RACH access process. In the embodiment of the invention, the secondary synchronization signals are transmitted in an uplink special time slot, so that the terminal can acquire the quality information of the uplink channel by receiving the secondary synchronization signals in a cell synchronizing phase, and the transmitting power can be determined according to the quality information of the uplink channel before the RACH process occurs, thereby reducing the steps of adjusting the transmitting power.

Description

technical field [0001] Embodiments of the present invention relate to the field of communication technologies, and in particular to a method, system and device for introducing a secondary synchronization signal for downlink transmission into an uplink time slot. Background technique [0002] In the prior art, the LTE (Time Division-Long Term Evolution, long term evolution) frame structure includes FDD (Frequency Division Duplex, frequency division duplex) Type1 and TDD (Time Division Duplex, time division duplex) Type2. [0003] In the frame structure of FDDType1, such as figure 1 As shown, a radio frame of 10ms is divided into 10 Subframes (subframes) with a length of 1ms, and each Subframe is composed of two slots (time slots) with a length of 0.5ms. [0004] In the frame structure of TDDType2, such as figure 2 As shown, the 10ms wireless frame is composed of two Half-Frames (half frames) with a length of 5ms, each Half-Frame is composed of 5 Subframes with a length of ...

Claims

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Application Information

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IPC IPC(8): H04W52/24H04W74/08
CPCH04W52/16H04W74/0833H04W76/02H04W48/08H04W52/146H04W72/02H04W56/00H04W52/246H04W52/245H04W52/50H04W76/10H04W52/24H04W74/08H04W88/02
Inventor 沈晓冬徐晓东杨宁
Owner CHINA MOBILE COMM GRP CO LTD
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