A random access method and base station based on single carrier tdma

Abstract

The embodiment of the present application provides a single-carrier TDMA-based random access method and a base station, wherein the method is based on a single-carrier and TDMA access method for networking, and the physical layer frame of the method includes a TDD wireless frame, so The length of the TDD radio frame is 10ms, the TDD radio frame includes 10 time slots, and 4 consecutive TDD radio frames form a multiframe, wherein the first 2 time slots and The last 8 time slots are respectively used as the bearer of the control channel and traffic channel. The control channel includes: broadcast control channel BCCH, random access channel RACH, grant access channel AGCH, paging channel PCH, dedicated control channel DCCH and frequency correction Channel FCCH; the RACH time slot includes a plurality of RACH sub-slots; the embodiment of the present application can shorten the access delay, and improve the access capacity, access rate and transmission rate.

Description

technical field [0001] The present application relates to the technical field of time division multiple access (TDMA, time division multiple access), in particular to a random access method based on single-carrier TDMA and a base station. Background technique [0002] The random access process is an important process in the wireless communication system and an important link in the wireless access process. In the TDMA system, one of the third-generation mobile communication systems, the random access process includes important uplink synchronization process. The TDMA system is based on time-division duplex technology, which uses different time slots on the same frequency channel to receive and transmit data. [0003] When applied to a Global System of Mobile communication (GSM, Global System of Mobile communication) system, the TDMA system performs random access according to the GSM protocol. However, each random access channel (RACH, Random Access Channel) in the GSM prot...

AI Technical Summary

Problems solved by technology

However, each random access channel (RACH, Random Access Channel) in the GSM protocol can only guarantee that one terminal successfully initiates random access; and, for a single terminal, the sending timing of the channel request message sequence is not arbitrary, and needs to be Common Control Channel (CCCH, Common ControlChannel) block is sent at the corresponding time, and the CCCH block is the CCCH corresponding to the paging group (PAGING GROUP) to which it belongs. Generally speaking, the number of PAGING GROUP in a GSM cell is 10 So, for a single terminal, it needs to wait for 10 GSM TDMA frames on average before initiating random access, that is, currently a single terminal needs to spend 46.15ms to complete random access

[0004] In summary, the current random access scheme based on TDMA has the disadvantage of prolonging the access time

Moreover, it can only guarantee the access of one terminal at the same time

In addition, it uses GSM narrowband signals (single carrier frequency bandwidth is 200k), so it has the disadvantages of low access rate and low transmission rate

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