WO2007118350A1

WO2007118350A1 - Relay device, broadband wireless content delivery system and method for maintaining and delivering content thereof

Info

Publication number: WO2007118350A1
Application number: PCT/CN2006/000679
Authority: WO
Inventors: Xinxi Diao
Original assignee: Zte Corporation
Priority date: 2006-04-14
Filing date: 2006-04-14
Publication date: 2007-10-25
Also published as: CN101395941B; CN101395941A

Abstract

A relay device, broadband wireless content delivery system and method for maintaining and delivering content. The relay device includes a pre-positive content server; and the system are wireless relay device and pre-positive content server management unit which add pre-positive content server into existing mobile communication system; the method includes: a method for the pre-positive content server uploading and updating the content into the pre-positive content server in the relay node; a method for realizing content download by wireless digital relay device with pre-positive content server; a method for realizing data and stream media broadcast by wireless digital relay device with pre-positive content server. This device, system and method can realize content download and broadcast flexibly and effectively, providing a technical solution with high operable for wireless communication network evolvement to telecommunication, information serve integration network.

Description

Relay device, broadband wireless content distribution system and content maintenance and transmission method thereof

Technical field

The present invention relates to the field of electronic communications, and in particular, to a relay device, a broadband wireless content distribution system, and a method for maintaining and transmitting the content thereof.

Background technique

Providing universal information services is a trend of social development. The future demand for wireless communication systems will mainly be reflected in the support capabilities of data services, that is, the ability to support information services. The future wireless network will be a communication/consumption/information. Integrated service network. This wireless integrated service network will be applied to: education, news, entertainment, transportation, business and so on.

At present, in the evolution of cellular mobile communication networks to wireless integrated service networks, the following technologies have emerged:

3GPP OGPartnershipProject: Technical Report of the 3rd Generation Mobile Communications Collaborative Project Organization, number 23.246 (TS 23.246), entitled "Multimedia Broadcast Multicast Service; Architecture and Functional Description" Inside, the architecture and functionality of the broadcast/multicast (MBMS) technology discussed are described. Multicast and broadcast services MBMS is based on WCDMA (Wideband Code Division Multiple Access) / GSM (Global System for Mobile Communications) packet networks, by adding some new functional entities, such as the Broadcast Multicast Service Center (BM-SC), Some packet domain functional entities such as SGSN (Serving GPRS (General Packet Radio Service) Support Node), GGSN (Gateway GPRS Support Node), RNC (Radio Network Controller) and UE (User Equipment) add MBMS functions and define The new logical shared channel is used to implement air interface resource sharing. .

The broadcast multicast service center BM-SC is one of the most characteristic network elements for implementing multimedia services in the third generation mobile communication. When there is a content service request, the BM-SC is located from the private content service controller in the carrier network, or is located. The content requested by the user is obtained on the server of the core network and sent to the user in an appropriate manner.

In order to facilitate access to the content service controller, Patent Application No. US20040110484, entitled "Relay Device, Content Transmission Control Method, and Content Delivery System" The patent document of "Processing, Method of controlling content delivery, and content delivery system" provides a method for pre-positioning a content service controller. The method is in UTRAN (Universal Mobile Telecommunications System Terrestrial Radio Access Network) A local content service controller connected to the base station controller is introduced therein to improve the speed at which the BM-SC accesses content to the core network or other networks outside the core network when providing the content service.

1ST (Information Society Technologies) WINNER (Wireless World Initiative New Radio) Project Research Report "IST-2003-507581 WINNER D3.4, definition and evaluation of relay-based cellular layout concepts for future wireless solutions (Defmitkm and assessment of "relay based cellular deployment concepts for future radio scenarios considering 1st protocol characteristics" "Comprehensively the existing various wireless digital repeater structures and various existing deployment schemes using wireless digital repeaters to enhance cellular system service capabilities" evaluation of.

IST-2003-507581 WINNER D3.4 gives the basic structure of the Radio Access Network (RAN) part of a cellular mobile communication system based on fixed wireless digital repeaters. As shown in FIG. 1, the fixed wireless digital repeater-based cellular mobile communication system 501 includes: a plurality of wireless digital repeaters 101a 101101n distributed in a manner around the access point device (cell base station) 102, The mobile terminal 103 communicates with the cellular base station 102 in a two-hop manner via a wireless digital repeater 101f through some or some of the wireless digital repeaters. The content service controller 104 controls the content transfer between the base station and the terminal. It is the entry of the content provider for authorizing and initiating the MBMS bearer service in the mobile network and transmitting the MBMS content according to a predetermined schedule. Its features include:

Authentication, authorization and billing for third-party content providers;

Provide MBMS transmission related parameters, such as QoS (Quality of Service), multicast broadcast area, initiate and terminate MBMS transmission resources;

Receive and transmit MBMS content from an external data source, schedule an MBMS session transfer and inform the user, retransmit the session, etc.

Service statement, including media description, session description such as multicast service identifier, address, and transmission time Wait.

IST-2003-507581 The basic structure of the wireless digital repeater given by WINNER D3.4 is shown in Figure 2. The basic structure of the wireless digital repeater includes two channels, up and down, each channel receiving the received signal. Perform remodulation, encoding, and decoding before demodulation, decoding, and retransmission. The signal received by the downlink channel is sent from the donor antenna 201 to the downlink receiving through the basic steps of the duplexer (filter) 202, the linear power amplifier (LNA) 203, the down-conversion 204, and the analog-to-digital conversion (A/D) 205. And the transmit baseband processing unit 206, the downlink receive and transmit baseband processing unit 206, under the control of the management control unit 219, demodulates, decodes, remodulates, encodes, etc. the received signal, and then undergoes digital-to-analog conversion 207, up-conversion 208. The power amplifier 209 and the duplexer 211 are sent to the retransmission antenna 210 to transmit to the terminal. The signal received from the mobile terminal by the uplink channel is from the retransmission antenna 210, through the duplexer (filter) 211, and the linear power amplifier (LNA) 212. The basic steps of down conversion 213 and analog-to-digital conversion (A/D) 214 are sent to the uplink receiving and transmitting baseband processing unit 215, and the uplink receiving and transmitting baseband processing unit 215 controls the receiving signal under the control of the management control unit 219. After demodulation, decoding, re-modulation, encoding, etc., after digital-to-analog conversion 216, up-conversion 217, power amplifier 218, duplexer 20 2 is sent to the donor antenna 201 and transmitted to the base station via the donor antenna 201.

As shown in Figure 2, the basic structure of the wireless digital repeater, IST-2003-507581 WINNER D3.4 also gives a variety of variants of wireless digital repeaters, such as: When a time division duplex is required ( When the terminal of TDD is relayed to a frequency division duplex base station, as shown in FIG. 1, the air interface 105 between the wireless digital repeater 101f and the base station 102 is different from the wireless in the working frequency and coding and modulation modes. An air interface 106 between the digital repeater 101f and the terminal 103. The duplexer 211 at this time will be replaced by the radio frequency switch.

At present, the disadvantage of introducing a fixed repeater (relay station) in a cellular mobile communication system is that it is merely used as a communication relay, and does not involve a method of exchanging transmission efficiency by implementing content pre-storage at the front end, thereby providing content downloading, local data or The media broadcasting service is not flexible enough and the spectrum usage efficiency is relatively low;

Patent application number US20040110484, entitled "Relay device, content transmission control party "Relay apparatus, method of controlling content delivery, and content delivery system" gives a method of prepending a content service controller to an RNC (Radio Network Controller), which The method can improve the acquisition speed of the content by the UTRAN, but cannot save the traffic and spectrum resources of the air interface. In the case where multiple users apply for the same information service to the base station in different time periods, the existing server configuration in the wireless system The method will cause the same information data to be repeatedly transmitted on the air interface of the base station multiple times, wasting spectrum resources.

The present invention provides a relay device, a broadband wireless content distribution system, and a content maintenance and transmission method thereof. By introducing a pre-content server in a wireless digital repeater, the pre-content server is loaded with the idle spectrum in the idle period. The content that needs to be broadcast or downloaded realizes the time shift of the spectrum resources, reduces the amount of data transmission between the base station and the wireless digital repeater on the air interface, and makes the valuable spectrum concentrated for real-time and unscheduled information. Transmission, which provides a flexible and efficient system structure and implementation path for the integrated service network in which the wireless communication network evolves into communication and content services, and improves the coverage quality and spectrum efficiency of the base station broadcast signal.

In order to solve the above technical problem, the present invention provides a relay device, a broadband wireless content distribution system, and a content maintenance and transmission method thereof, and a relay device, configured to perform signal relay forwarding in a wireless communication system, where the device includes :

a wireless digital repeater having a management control unit for demodulating, decoding, and remodulating and encoding the received signal under control of the management control unit, the apparatus further comprising : .

Pre-content server, including:

a memory for storing media content data; and a database maintenance unit, configured to perform data access to the memory under control of the management control unit according to an operation command received by the wireless digital repeater; N2006/000679 The wireless digital repeater reads content data from the memory through the management control unit according to the received operation command, and broadcasts through the air interface.

The present invention further provides a broadband wireless content distribution system, comprising: one or more base stations, one or more terminals, one or more relay devices, the base station has a content service controller, and the relay device includes A wireless repeater having a management control unit for performing signal relaying between the base station and the terminal, wherein:

The relay device further includes:

a pre-content server, comprising: a memory for storing media content data; and a database maintenance unit, configured to, according to an operation command received by the wireless digital repeater, under the control of the management control unit Memory for data access;

The content service controller includes:

a pre-content server management unit, configured to manage and maintain content of the pre-content server by sending an operation command to the wireless digital repeater;

The wireless digital repeater reads the content data from the memory through the management control unit according to the received operation command, and broadcasts it through the air interface.

The pre-content server management unit of the content service controller may perform management and maintenance on the pre-content server, including regular maintenance and immediate maintenance.

The pre-content server management unit of the content service controller may load content to the pre-content server based on a plan.

The pre-content server management unit of the content service controller may load the content to the pre-content server based on statistics.

The plurality of wireless digital repeaters use working frequency points that are spatially staggered from each other, and the respective contents can be transmitted.

The wireless digital repeater can transmit content using a spectrum reserved by the base station for content transmission.

The wireless digital repeater can use the idle spectrum of the base station to transmit content. The wireless digital repeater can use the spectrum of other cells to transmit content.

The present invention also provides a method for the content delivery system to maintain content stored in the relay device, comprising the steps of:

(A1) The content service controller commands the pre-content server to report the service record and the current available storage capacity information in a specific time interval through the pre-content server management unit;

(A2) the content service controller sends the service content to the forward content server through the pre-content server management unit according to the information reported by the pre-content server;

(A3) The content list of the pre-content server created by the pre-content server is updated by the pre-content server according to the transmitted service content, and the pre-content server management unit updates the mirror list corresponding to the content of the pre-content server.

The step (A2) may further include: the content service controller clearing the service content in the pre-content server through the pre-content server management unit according to the information reported by the pre-content server;

The step (A3) may further include: updating, according to the cleared service content, the content list of the pre-content server created by the pre-content server, and updating the pre-content server with the pre-content server by the pre-content server management unit A mirrored list of content.

The present invention also provides a method for content delivery system to provide content to a terminal, comprising the following steps:

(B1) The terminal reports the service request and the location information, where the location information includes: a signal strength and a repeater identification flag transmitted by the wireless digital relay received by the terminal;

(B2) The content service controller determines the available repeater according to the location information reported by the terminal;

(B3) the content service controller determines whether there is content requested by the terminal on the pre-content server corresponding to the repeater;

(B4) If there is content requested by the terminal on the pre-content server, the download of the terminal is guided by the content service controller.

The method can further include: (B5) If there is no content requested by the terminal on the pre-content server, the content service controller sends the content requested by the terminal to the content service controller corresponding to the relay through the air interface, and guides the terminal to download.

The present invention also provides a method for a content delivery system to provide coordinated broadcast, comprising the following steps:

(C1) the base station sends control signaling, where the broadcast content indication information is carried;

(C2) the wireless digital repeater determines the content to be sent according to the received broadcast content indication information, and reads the broadcast content stored in the pre-content server according to a preset manner by the content service controller. ;

(C3) The wireless digital repeater determines the modulation mode, coding mode, RF rate, symbol level synchronization time, and transmission power to be used;

(C4) The wireless digital repeater broadcasts the read content over the air interface. In the step (C3), the wireless digital repeater may determine the modulation mode and the coding mode to be adopted according to the transmission parameter indication information carried in the control signaling sent by the base station.

In the step (C3), the wireless digital repeater can determine the modulation mode and the coding mode to be used according to the modulation mode and the coding mode information carried by the content itself in the pre-content server.

In the step (C3), the wireless digital repeater can determine the transmission frequency by locking the transmission frequency on the signal transmitted by the base station.

In the step (C3), the wireless digital repeater can determine the transmission frequency by locking the transmission frequency on the signal of the global positioning system.

The invention introduces a pre-content server in a wireless digital repeater, and loads the content that needs to be broadcasted or downloaded in the future by using the idle spectrum in the idle period, thereby realizing the time shift of the spectrum resource. By using the device, system and method of the invention, the broadcast content can be obtained locally, the coverage quality and spectrum efficiency of the base station broadcast signal can be improved, and the data transmission amount between the base station and the wireless digital repeater on the air interface can be reduced, so that the valuable spectrum is made. Centralized for the transmission of real-time and non-scheduled information, for wireless communication networks to evolve into communication, content services Provide a flexible and efficient system structure and implementation path for an integrated service network. BRIEF abstract

1 is a structural diagram of a conventional fixed wireless digital relay system;

2 is a basic structural diagram of a conventional fixed wireless digital repeater;

3 is a structural diagram of a relay device according to an embodiment of the present invention;

4 is a structural diagram of a content transmission system based on a relay device according to an embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

As shown in FIG. 3, which is a structural diagram of a relay apparatus according to an embodiment of the present invention, the relay apparatus of the present invention is composed of two parts: a wireless digital repeater and a pre-content server 301.

The basic structure of a wireless digital repeater includes two channels, uplink and downlink, each of which remodulates, encodes, and demodulates the received signal before demodulation, decoding, and retransmission. The uplink and downlink channels of the wireless digital repeater may be in the form of TDD (Time Division Duplex), FDD (Frequency Division Duplex), or may be adopted at the donor end and the retransmission end respectively. Different duplex forms, such as FDD in the donor end, use TDD duplexing in the retransmission end.

The pre-content server 301 is composed of a large-capacity high-speed memory and a database maintenance unit. The large-capacity high-speed memory is used for storing media content data, and the large-capacity high-speed memory is composed of a solid-state memory or a hard disk; the database maintenance unit performs data writing, reading, deleting, and content on the large-capacity high-speed memory according to an operation command received by the donor antenna. catalog.

The wireless digital repeater with the pre-content server transmits the pilot signal and the repeater identification (ID) signal according to the frequency point and the time slot parameter sent by the base station, and the pilot signal is used between the terminal and the repeater. Synchronize. The repeater identification signal sent by the terminal repeater after synchronization is established, as well as other signals, such as content service information (including current broadcast content, downloadable content, etc.).

The repeater identification signal sent by the wireless digital repeater with the pre-content server can It is a specific coded signal carried by a pilot, or it may be a coded signal transmitted with other information. Wireless Digital Repeater with Pre-Content Server in Pre-Content Server Management Unit

402 preset time, content, and mode, read content data from the pre-content server, and send broadcast information to the area covered by the repeater through the air interface; the broadcast information is independent of the broadcast content of other repeaters. They can be the same or different.

As shown in FIG. 4, it is a structural diagram of a relay device-based content transmission system according to an embodiment of the present invention, which includes: a plurality of wireless digital repeaters 101'a to 101 including a pre-content server 401. ' _n , several cellular mobile communication base stations or access points 102 of other wireless access systems, several terminals 103' with dual synchronization control unit 403, and several content service controls with pre-content server management unit 402 104'.

Around the cellular base station 102, a plurality of wireless digital repeaters 101'a-101'n including the pre-content server 401 are distributed in a certain manner, and the mobile terminal 103' establishes a communication link with the cellular base station 102 in three ways. Species: 1) establish a communication link with the cellular base station 102 in a two-hop manner through a wireless digital repeater, such as through a wireless digital repeater 101'f; 2) directly communicate with the cellular base station in a single hop manner 102 establishing a communication link; 3) establishing a communication link with the cellular base station 102 directly in a single hop manner, and establishing a communication link with the cellular base station 102 in a two-hop manner by a wireless digital repeater, In this manner, the dual synchronization control unit 403 within the terminal 103' simultaneously locks the base station synchronization signal and the repeater synchronization signal. The content service controller 104' with the pre-content server management unit 402 maintains the content of the pre-content server 401 over the air interface.

The content service controller 104' uses the pre-content server management unit 402 and the UTRAN, other servers within the core network, and the content service controller of the external network to provide content services to the terminal 103'.

The pre-content server management unit 402 performs maintenance on the content of the pre-content server 401 into regular maintenance and instant maintenance, for example, uploading new content to the pre-content server 401, cleaning out outdated content, and checking the consistency of the content. The pre-content server management unit 402 establishes content mirroring for the content of each pre-content server within the UTRAN or within the core network. The manifest and content mirror database, the content mirror database stores the union of the contents of each pre-content server.

The pre-content server management unit 402 loads the pre-content server in various ways: 1) content-based content loading; 2) statistics-based loading, that is, historical statistical results of the content service class according to the location of the pre-content server, Loading and retaining the content class of the demand; 3) Instant loading, when the pre-content server does not pre-store the content requested by the user, the repeater stores the content in the base station while forwarding the content sent by the base station to the user. Placed in the content server.

The pre-content server management unit 402 can load the pre-content server in a specific time, such as during communication idle period, one case is when the night communication service is idle; or can be loaded in real time, such as live broadcast and loading of breaking news data;

The wireless digital repeaters 101'a to 101'n have two modes of operation: a communication relay mode and a content transmission mode in a local area.

When operating in the transmission mode of the content of the local area wireless digital repeater 101 _'a ~ 101'n parallel offers its services within the cell coverage, the service content comprises: content download broadcasting. The content that different wireless digital repeaters need to issue to their cell, especially the download service, is generally different. Therefore, when the wireless digital repeater 101'a~101'ii works in a local area, the content is sent. In the mode, in order to avoid interference, the working frequency points which are spatially staggered are used.

When operating in a content transmission mode in a local area, the spectrum resource allocation and dynamic adjustment methods of the wireless digital repeaters 101'a~101'n: 1) using a spectrum reserved by the base station for downloading, broadcasting, and multicast services, Such as time slots; 2) using the idle spectrum of the base station; 3) using the spectrum of other cells, the wireless environment measurement data coordination is required.

When operating in a content transmission mode in a local area, the base station (or access point) 102 broadcasts access guidance information for the terminal to access the wireless digital repeater to the area it covers, and the access guidance information includes the use of the repeater. Frequency point, time slot, time relationship with respect to the base station synchronization signal.

When working in a content delivery mode within a local area. Base station (or access point) 102 to it The relay access guide information broadcasted in the coverage area may include a plurality of frequency points and time slots. The terminal implements fast access with the repeater according to the frequency point, the time slot, and the time relationship of the synchronization signal transmitted by the base station (or the access point).

In an embodiment of the present invention, the access point 102 is a base station of the IEEE 802.16e system, and the wireless digital repeaters 101'a-10rn are disposed in the area covered by the IEEE 802.16e base station, and the wireless digital repeaters 101'a-101 'n comes with a pre-content server 401. The terminal 103' is a portable computer. To support content services, an IEEE 802.16e base station is connected to the content service controller 104' with the pre-content server management unit 402 via the SGSN and GGSN.

In order to avoid interference and save costs, the wireless digital repeaters 10r _{a to} 101'n are only installed in hot spots, such as stations, intersections, and subway stations. In order to comprehensively provide broadcasting, communication, and download services, the available spectrum resources are divided into three parts in time: spectrum for base station broadcasting, spectrum B for mobile communication, and spectrum for wireless digital repeaters (. Dynamically adjust based on changes in business volume.

When the base station broadcasts with its broadcast spectrum A (corresponding to a time slice A), the wireless digital repeater also uses the spectrum A of the base station broadcast to broadcast in cooperation with the base station;

When the base station communicates with its communication spectrum B (corresponding to a time slice B), if the terminal performing communication is in the coverage area of a certain wireless digital repeater, the wireless digital repeater also uses the spectrum B pair for base station communication. The communication signal of the base station is relayed;

When the wireless digital repeater is used for the content broadcast or download mode of the local area, the spectrum C of the wireless digital repeater (corresponding to a time slice C) is used. At this time, corresponding to the time slice C, the base station does not transmit a signal, and each wireless digital is used. The relay implements spatial multiplexing of the same spectrum in the time slice C, which improves the efficiency of the spectrum. For example, the wireless digital repeater lOl'a lOl'n covered by the access point 102 partially covers the commercial street, some covers the school, and some partially covers the bus stop. In the time slice C, the wireless number of the commercial street is covered. The relay provides a broadcast service for commercial advertisements and a download service for commodity information. At the same time, in the time slice C, the wireless digital repeater covering the school provides multimedia teaching broadcast and multimedia download services, and wireless numbers covering the bus stop. Relay provides traffic route download service and bus arrival time Broadcast notice service (at this time, the bus arrival time notices sent by the wireless digital repeaters of different bus stops are different).

Another embodiment of the present invention is a content maintenance method of a content service controller of a relay device, wherein the pre-content server management unit 402 performs content uploading, content clearing, and content list update on the pre-content server 301. Specific steps are as follows:

Step 1: The pre-content server management unit 402 acquires related data of the pre-content server 301.

The pre-content server management unit 402 requests the pre-content server 301 to report the service record in its specific time interval and the current available storage capacity information in order to optimize the upload of the content of the pre-content server 301;

Step 2: The pre-content server management unit 402 sends the content to the content server 301;

A transmission method is pre-sending, and the content is transmitted to the content server 301 in advance according to the content requirement of the service area of the pre-content server 301.

The content requirement of the content service controller service area may be predetermined broadcast information (such as advertisement, streaming media), and may be multimedia content such as frequently downloaded audio and video;

One method is to instantly update the content of the pre-content server 301. When the pre-content server management unit 402 confirms that the pre-content server 301 currently available to the service requesting terminal does not have the content requested by the terminal, it immediately goes to the relay device. The pre-content server 301 sends (uploads) the content while transmitting its requested content to the terminal through the repeater.

Step 3: Synchronize the content list

After completing the loading of the pre-content server 301, the pre-content server management unit 402 updates the mirror list corresponding to the content created by the pre-content server 301, and the pre-content server 301 updates the content list created by the pre-content server. The server management unit 402 maintains the two manifest synchronization updates, content peers, and the like.

After completing the content clearing of the pre-content server 301 once, the pre-content server management unit 402 and the pre-content server 301 also perform the same content list synchronization update. N2006/000679 A further embodiment of the present invention is a content downloading method based on a relay device, the specific steps of which are:

Step 1: The service request reported by the terminal and the signal strength and the repeater identification flag transmitted by the wireless digital repeater received by the terminal (the network uses the information reported by the terminal to obtain the location information of the wireless digital repeater);

Step 2: The content service controller 104' receives the service request reported by the terminal;

Step 3: The content service controller 104' determines whether there are available repeaters based on the location information of the terminal.

Step 4: The content service controller 104' determines whether there is content requested by the terminal on the pre-content server 401;

Step 5: If the pre-content server 401 has the content requested by the terminal, the content service controller 104' guides the download of the terminal;

Step 6: If the pre-content server 401 does not have the content requested by the terminal, the content service controller 104' transmits the content requested by the terminal to the content service controller of the repeater through the air interface, and guides the terminal to download;

Yet another embodiment of the present invention is a relay-based cooperative broadcast method in which the wireless digital repeaters 101'a-101'n follow the content service controller 104 when the cellular base station 102 broadcasts predetermined content to the area covered by the cellular base station 102. 'Pre-set time, content, and method, the content pre-existing in the pre-content server 401 and the content broadcasted by the upper-layer cellular base station 102 is read out through the air interface, and the broadcasts are transmitted as follows. Content:

In the first step, the wireless digital repeater 10ra~101'n determines the content to be sent, and the specific method is to display the information according to the content carried in the control signaling sent by the base station 102.

In the second step, the wireless digital repeaters 101'a-101'n determine the modulation mode and the coding mode to be used, which can be implemented in two ways: 1) According to the transmission parameters carried in the control signaling sent by the base station 102 The indication information; 2) the modulation mode and the coding mode information carried according to the content itself in the pre-content server 401;

In the third step, the wireless digital repeater 10ra~10rn realizes the frequency of transmitting the content and the cellular base. The frequency of the station 102 is strictly synchronized. One method for realizing frequency point synchronization is that the wireless digital repeater 10l'a-lOll'n locks the frequency on the signal transmitted by the cellular base station 102, and a method for realizing frequency synchronization is wireless. The digital repeaters 101'a~101'n lock the frequency on the signals of the global positioning system;

In the fourth step, the wireless digital repeaters 101'a~101'n determine the symbol level synchronization time of the transmitted content, and a method for determining the synchronization time is that the wireless digital repeaters 101'a~101'n lock the time in the cellular On the signal transmitted by the base station 102, a method for determining the synchronization time is that the wireless digital repeater 10ra~101'n locks the time on the signal of the global positioning system;

In the fifth step, the wireless digital repeater 10ra~101'n determines the transmission power of the transmitted content, one method is based on the predetermined power transmission, and the other is based on the power control signal transmitted by the cellular base station 102.

In the sixth step, the wireless digital repeaters 101'a to 101'n cooperate with the base station 102 to transmit a broadcast signal. Industrial practicability information services and communication services are characterized by: 1) differences in geographical areas, people in different geographical areas care about different types of information; 2) planability in sending time, some The issuance of class information, such as audio and video broadcasting services, is carried out according to the prior schedule; 3) the statistical regularity existing in the content class, and the demand for various types of information in a specific time zone within a specific area is For statistical rules, content classes with high download frequency are used as priority loading content classes.

The present invention provides a method for exchanging spectrum usage efficiency with a memory, introducing a pre-content server through a wireless digital repeater, and using the idle spectrum to load the pre-content server for future broadcasts or during idle periods (eg, late at night) The downloaded content realizes the time shift of the spectrum resources. In addition, since the broadcast content can be obtained locally, the wireless digital repeater can transmit the content in cooperation with the base station when the base station broadcasts the content, thereby improving the coverage quality and spectral efficiency of the base station broadcast signal.

In wireless systems that introduce wireless digital repeaters, by pre-caching content locally (where the wireless digital repeater is located), reducing the amount of data transmission between the base station and the wireless digital repeater on the air interface, so that valuable spectrum is concentrated for real-time and unscheduled information transmission, which is an evolution of the wireless communication network. Provide a flexible and efficient system structure and implementation path for integrated service networks that integrate communication and content services.

Claims

Claim

A relay device for performing signal relay forwarding in a wireless communication system, the device comprising:

a wireless digital repeater having a management control unit for demodulating, decoding, and remodulating and encoding the received signal under control of the management control unit, wherein

The device further includes a pre-content server, including:

a memory for storing media content data; and

a database maintenance unit, configured to perform data access to the memory under control of the management control unit according to an operation command received by the wireless digital repeater; and the wireless digital repeater is configured according to the received operation Commanding, reading content data from the memory through the management control unit, and broadcasting out through the air interface.

2. Apparatus according to claim 1 wherein said memory is comprised of a solid state memory or a hard disk.

3. The apparatus according to claim 1, wherein the database maintenance unit performs data access to the memory, including data writing, reading, deleting, or content cataloging.

A broadband wireless content distribution system, comprising: one or more base stations, one or more terminals, one or more relay devices, the base station has a content service controller, and the relay device includes management control The unit's wireless repeater is used for signal relaying between the base station and the terminal, and is characterized by:

The relay device further includes:

a pre-content server, including - a memory for storing media content data; and

a database maintenance unit for receiving operations according to the wireless digital repeater Acting as a command, performing data access to the memory under the control of the management control unit; the content service controller includes:

The system according to claim 4, wherein the memory is constituted by a solid memory or a hard disk.

The system according to claim 4, wherein the database maintenance unit performs data access to the memory, including data writing, reading, deleting or content cataloging.

The system according to claim 4, wherein the pre-content server management unit of the content service controller manages and maintains the pre-content server, including regular maintenance and immediate maintenance.

8. The system according to claim 4, wherein the pre-content server management unit of the content service controller loads the content to the pre-content server based on a plan.

9. The system according to claim 4, wherein the content server controller of the content service controller loads the content to the pre-content server based on statistics.

The system according to claim 4, wherein the content server controller of the content service controller passes through the wireless digital repeater when the content requested by the user is not pre-stored in the pre-content server. The content is loaded to the pre-content server while forwarding the content transmitted by the base station to the user.

The system according to claim 8, 9 or 10, characterized in that the content server management unit of the content service controller loads content to the pre-content server during idle period of system communication.

The system according to claim 8, 9 or 10, wherein the content server controller of the content service controller loads the content to the pre-content server in real time.

The system according to claim 4, wherein the plurality of wireless digital repeaters use the operating frequency points that are spatially offset from each other to transmit the respective contents.

The system according to claim 4, wherein said wireless digital repeater transmits content using a spectrum reserved by said base station for content transmission.

The system of claim 4 wherein said wireless digital repeater transmits content using an idle spectrum of said base station.

The system of claim 4 wherein said wireless digital repeater uses the spectrum of other cells to transmit content.

17. A method of maintaining content stored in a relay device using the content delivery system of claim 4, comprising the steps of -

(A1) The content service controller commands the pre-content server to report the service record and the current available storage capacity information in the specific time interval through the pre-content server management unit; (A2) according to the information reported by the pre-content server, The content service controller sends the service content to the forward content server through the pre-content server management unit;

18. The method of claim 17 wherein:

The step (A2) further includes: according to the information reported by the pre-content server, the content service controller clears the service content in the pre-content server through the pre-content server management unit;

The step (A3) further includes: updating, according to the cleared service content, the content list of the pre-content server created by the pre-content server, and updating the content of the pre-content server by the pre-content server management unit Corresponding mirror list.

The method according to claim 17, wherein the step (A2) comprises: the content service controller pre-provisioning the content service through the pre-content server management unit Send the service content.

The method according to claim 17, wherein the step (A2) comprises: when the current content server management unit confirms that the pre-content server currently available to the service requesting terminal does not have the service content requested by the terminal, The content server is sent to the terminal by the instant forward content server, and the content requested by the terminal is sent to the terminal through the repeater.

A method for providing a content download to a terminal by using the content distribution system according to claim 4, comprising the steps of:

(B1) the terminal reports the service request and the location information;

(B2) The content service controller determines the available repeater based on the location information reported by the terminal.

The method according to claim 20, wherein the method further comprises: (B5) if there is no content requested by the terminal on the pre-content server, the content service controller corresponds to the repeater through the air interface. The content service controller sends the content requested by the terminal and guides the terminal to download.

23. A method of providing a coordinated broadcast using the content delivery system of claim 4, comprising the steps of:

(C3) The wireless digital repeater determines the modulation mode, coding mode, transmission frequency, Symbol level synchronization time, and transmission power;

(C4) The wireless digital repeater broadcasts the read content over the air interface.

24. The method of claim 22, wherein:

In the step (C1), the control signaling sent by the base station further carries the transmission parameter indication information.

In the step (C3), the wireless digital repeater determines the modulation mode and the coding mode to be adopted according to the transmission parameter indication information carried in the control signaling sent by the base station.

The method according to claim 22, wherein in the step (C3), the wireless digital repeater determines the modulation to be adopted according to the modulation mode and the coding mode information carried by the content itself in the pre-content server. Ways and coding methods.

The method according to claim 22, wherein in the step (C3), the wireless digital repeater determines the transmission frequency by locking the transmission frequency on the signal transmitted by the base station.

The method according to claim 22, wherein in the step (C3), the wireless digital repeater determines the transmission frequency by locking the transmission frequency on the signal of the global positioning system.

The method according to claim 22, wherein in the step (C3), the wireless digital repeater determines the symbol level synchronization time of the transmitted content by locking the time on the signal transmitted by the base station. '

The method according to claim 22, wherein in the step (C3), the wireless digital repeater determines the symbol level synchronization time of the transmission content by locking the time on the signal of the global positioning system.

The method according to claim 22, wherein in the step (C3), the wireless digital repeater determines the transmission power of the transmitted content according to the predetermined power.

The method according to claim 22, wherein in the step (C3), the wireless digital repeater determines the transmit power of the transmitted content according to the power control signal sent by the base station.