Time-division duplex mode based high-speed data transmission method

Abstract

The method distributes time section for data uplink emitting and downlink emitting within a time frame first; and distributes synchronous time slots for realizing uplink synchronization and downlink synchronization, control time slots for transmitting uplink signaling and downlink signaling, common pilot frequency time slot for channel estimation and service time slot for transmitting high speed data within the abovesaid time section; then data emitting equipment in common pilot frquency time slot and service time slot will transmit pilot frequency signal and high speed service data of the user separately and finally data receiving equipment will carry on receiving of channel estimation and high speed service data according to the distributed common pilot frequency time slot and the distributed service time slot.

Description

technical field [0001] The invention relates to a data transmission method in a wireless communication system adopting the time division duplex (TDD) standard, especially a high-speed data transmission method. Background technique [0002] In the third-generation wireless communication system currently adopting the TDD standard, such as in the Time Division Synchronous Code Division Multiple Access (TD-SCDMA) system, data transmission is usually carried out by the following method: using 96-chip downlink pilot time slots (DwPTS) realizes the synchronization of downlink reception; uses the uplink pilot time slot (UpPTS) added to the 96-chip guard period (GP) to realize the synchronization of uplink reception; and finally provides transmission services for data of different users through business time slots with the same time length . The time slot structure reference used by the above method figure 2 , the figure describes the time slot structure in a subframe (subframe) wi...

AI Technical Summary

Problems solved by technology

However, when using TDMA technology to provide multi-user data services, this intermediate pilot structure that supports multi-user parallel transmission can no longer achieve system performance optimization.

For customers who need high data rate services, multiple time slots may need to be allocated simultaneously in a subframe to ensure the realization of high-speed data communication. Since the pilot frequency of each time slot cannot be released for business data transmission, thus In essence, it causes a waste of time resources, which is not conducive to the realization of high-speed data transmission

therefore, figure 2 The service time slot structure of equal time length described in is more suitable for the voice service with higher real-time requirements and lower rate. The existing method adopts the above time slot structure to ensure that the voice service has suitable resources that can be allocated at any time. However, such a method is less applicable to data services with low real-time requirements and variable rates.

Images