A device for generating synchronization control adjust step length and the method thereof and the automatic switch method of the step length

A technology for synchronous control and adjustment of step size, which is applied in synchronizing devices, electrical components, time division multiplexing systems, etc. Effect

CN101124755BInactive Publication Date: 2011-07-13ZTE CORP
0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2011-07-13
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a device for generating the step length that is controlled and adjusted synchronistically as well as an automatic switch method for the setp length. The said device includes a Node B side module and a UE side module. The said method includes: the Node B side and the UE side module respectively determining the controlled step length kn of a current subframe according to a synchronistic control character SS[n-1]* processed and generated by the last subframe and a step length k[n-1] and the synchronistic control character SSn* of the user current subframe and an overadjust flag bit fOverAdjust. The automatic switch method for the step length includes the NODE and UE comparing whether the synchronistic character of the plural subframes which is sequential with the current subframe is the same direction as the synchronistic character of the current subframe, if so adopting the method which generates the synchronistic controlled and adjusted step length to generate the synchronistic control character; if not, adopting a fixed step length configured by a higher layer protocol. The invention obviously improves the speed of synchronistic tracking, overcomes the problems caused by the frequent conversion of the channel time delay, thereby obviously improving the system performance on the premise of no reduction of the synchronistic precision.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The present invention relates to a device and method for synchronous control in a mobile communication system, in particular to an adaptive method for generating synchronization in a Universal Terrestrial Radio Access Time Division Duplex (UTRA TDD) mobile communication system based on time division duplex. The device and method for controlling and adjusting the step size and the automatic switching method of the step size. Background technique

[0002] UTRA TDD system, such as TD-SCDMA with a low code rate of 1.28Mcps is a third-generation digital mobile communication system based on time division duplex code division multiple access. In the uplink, multiple mobile stations send signals to the base station and share In the same channel, in order to prevent the overlapping of channel impulse responses of different users and the interference between signals, it is necessary to control each user synchronously to ensure that they arrive at the base statio...

Examples

Embodiment Construction

[0043] see figure 1 , is a schematic diagram of the conventional time slot structure in the 3GPP UTRA TDD low code rate (1.28Mcps) communication system, wherein the 144 chips in the middle of the time slot are part of the training sequence, which is used for channel estimation of the user, and there are 352 codes on both sides of the training sequence The data part of the slice is used to carry the information sent by the user. The synchronization control command word (SS) and the synchronization control command word (SS) are located in the second data block, as shown in the figure, and the last 16 chips are protection part (GP).

[0044] Since both the NodeB and the UE need to know the user's synchronization control adjustment step size, the NodeB uses the synchronization control adjustment step size for linear prediction of the user's synchronization control word, and the UE uses it to adjust the delay during uplink transmission. Therefore, the device for generating synchr...