Structure of layered wireless access network, and implement method

Abstract

The invention consists of a wireless access sub network used to implement wireless access and a management control sub network used to manage and control the wireless access sub network. The method includes following steps: the wireless digital broadcast layer located at upper layer broadcasts synchronizing and control messages to the wideband wireless bearer layer located at intermediate layer, the mobile communication layer located at lower layer, and all kinds of terminal covered by those layers and cooperating with one or more layers in working; makes the synchronous measurement and adjustment for the network above; measures the difference between the arrival times in mobile communication layer by using fix time slot; in term of the fix time slot, implements the dynamical allocation and multiplexing for frequency spectrum in order to locate the mobile station.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a layered wireless access network structure and its realization method. Background technique [0002] The integration of wireless digital broadcasting (DVB, DAB) services, wireless communication (cellular and non-cellular) services and mobile Internet (INTERNET) services can provide services more flexibly and use spectrum more efficiently, and has a huge market prospect. The convergence of services will inevitably lead to convergence of networks and spectrum, that is, changes in spectrum reuse and spectrum allocation. [0003] Service convergence is mainly concentrated in some sub-projects under the EU IST (Information Society Technologies) project, such as the IST project code-named CISMUNDUS (Convergence of IP-basedServices for Mobile Users and Networks in DVB-Tand UMTS Systems) for DVB and UMTS / UMTS Systems GPRS / WLAN business integration has done a lot of research (ISTPr...

AI Technical Summary

Problems solved by technology

[0043] The main disadvantage of the existing network structure convergence technology is that it only focuses on the discussion of the core network structure suitable for service convergence, and does not comprehensively consider the problems involved in wireless access network convergence. For example, it does not discuss the wireless access network structure caused by service convergence. changes, and did not discuss the issue of spectrum convergence caused by service convergence

[0044] The disadvantage of the existing spectrum fusion technology is that it only focuses on discussing the technical issues involved in the frequency division fusion of spectrum, such as the coexistence of UMST and DVB-T when digital broadcasting and wireless communication use different frequency bands, and UMTS’s DVB-T frequency The problem of spatial multiplexing, lack of discussion on the more flexible and potentially more spectrally efficient time-division spectrum fusion

A major disadvantage of frequency division fusion is the need for additional guard band overhead, resulting in a waste of spectrum

Although the DVB and cellular reuse frequency spectrum method proposed by ERISSON can further improve the frequency reuse effect, the reuse coefficient of the method is still low, only (1 / 7)×2, and the network planning is complicated;

[0045] The disadvantage of the existing dynamic spectrum allocation technology is that the existing dynamic spectrum allocation is aimed at the frequency division system, and the frequency division band realizes the spectrum dynamic allocation between digital broadcasting and wireless communication. Realize the dynamic allocation of spectrum, which also limits the efficiency of spectrum use

[0046] US Patent Application No. 20010022781A1 provides a layered network structure that comprehensively realizes the combination of wireless digital broadcasting and content on-demand. From the perspective of its purpose and technical solution, it is only a solution to the problem of service on-demand in the broadcasting network, which cannot be solved. The problems faced by the integration of mobile communication and digital broadcasting are, for example, 1) the invention only discusses the transmitter, and the transmitter cannot realize the bidirectional link required by mobile communication; 2) the integration of communication and broadcasting needs to realize the wireless access point pairing The continuous coverage of the area, the transmitter scheme that the present invention provides can't realize continuous coverage; 3) the integration of communication and broadcasting requires more strict synchronization of the uplink and downlink on the air interface between each access point (or base station), the The invention cannot be realized; 4) The integration of communication and broadcasting requires the air interface to adopt a more spectrally efficient technology. Only in this way can the capacity used for broadcasting services not be reduced (or can be increased) in the existing broadcasting spectrum. Uncover capacity for mobile communications

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