A method and system for realizing common station address and coexistence of adjacent frequency

Abstract

The invention provides a method for realizing coexistence with an adjacent-frequency sharing station address of a time division synchronous code division multiple accesses (TD-SCDMA). The method comprises the procedures that signals are transmitted in n downlink time slots DL; before any of the downlink time slots (DL), the idling is conducted in a time span of a synchronous channel (SCH) or synchronous operation is implemented in the time span of the SCH; a time span of a first switching point is expanded into the time span of a downlink uplink shifting point (DUSP) and the idling is conducted in the time span of the DUSP; signals are transmitted in p uplink time slots UL; the idling is conducted in the time span of an uplink downlink shifting point (UDSP) and the finish time of the idleUDSP coincides with that of a second shifting point. The technical proposal of the embodiment of the invention guarantees better coexistence of the adjacent-frequency sharing station address between a 3G evolution system of the next generation and the TD-SCDMA.

Description

technical field [0001] The present invention relates to wireless communication technology, in particular to a method and system for realizing coexistence of adjacent frequency co-sites. Background technique [0002] With the rapid development of high-speed network technology and multimedia technology, the third generation mobile communication system (3G), local multipoint distributed service (LMDS), multipoint multichannel distributed system technology (MMDS) and microwave access global interoperability system (WiMAX) and other wireless networks are developing extremely rapidly, wireless networks are gradually evolving from circuit switching technology to packet switching technology, and various wireless broadband access technologies are also emerging in an endless stream. [0003] figure 1 It is a schematic structural diagram of a traditional wireless communication system in the prior art. Such as figure 1 As shown, the system includes: a base station controller, a tradi...

AI Technical Summary

Problems solved by technology

[0015] First, the switching point time from downlink to uplink is equal to the time length of the first switching point, which is equal to 75μs. Since the time length is relatively short, the downlink signal of TD-SCDMA interferes heavily with the uplink signal of B3G / 4G, or B3G / 4G downlink signal interferes heavily with TD-SCDMA uplink signal, which is why the B3G / 4G system and TD-SCDMA system cannot co-exist with adjacent frequency sites

[0016] Second, there are guard intervals between DL and DL, between UL and UL, and between DL and UL. These idle guard intervals will lead to a reduction in system spectral efficiency

DwPTS is located before the first switching point, and because of its high transmit power, it aggravates the interference to neighboring cells

[0017] Third, in the B3G / 4G system, the communication method based on the above frame structure does not support the relay technology

Since the first switching point of the 3GPP LTE frame is also relatively short, which is also equal to 75μs, the second technical solution will also have the problem in the first technical solution, that is, the downlink between TD-SCDMA and B3G / 4G The signal interferes too much with the uplink signal, so the two systems cannot coexist in a good adjacent frequency co-site

[0020] And because the B3G / 4G system is one of the 3G next-generation evolution systems, there is also the problem that the downlink signal interferes too much with the uplink signal between other 3G next-generation evolution systems and the TD-SCDMA system, so TD-SCDMA and TD-SCDMA cannot be guaranteed. Better Adjacent Frequency Co-Site Coexistence Between 3G Next Generation Evolved Systems

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