CN100536424C - Downlink carrier network and its method for transmitting downlink data - Google Patents
Downlink carrier network and its method for transmitting downlink data Download PDFInfo
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- CN100536424C CN100536424C CNB2006100654241A CN200610065424A CN100536424C CN 100536424 C CN100536424 C CN 100536424C CN B2006100654241 A CNB2006100654241 A CN B2006100654241A CN 200610065424 A CN200610065424 A CN 200610065424A CN 100536424 C CN100536424 C CN 100536424C
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Abstract
The disclosed down carrier-wave network comprises: a broadcast/multicast wireless network controller connecting with the kernel network, at least one BS, one or more transmission unit connected with receiving device. Wherein, the broadcast/multicast wireless network controller connects with the BS and sends data to the BS, the BS processes data from controller and sends to the connected transmission unit, and the latter transmits the broadcast/multicast data to the receiving device. This invention simplifies the network structure, and minimizes the networking cost for request business.
Description
Technical field
The present invention relates to communication technical field, be meant the method for a kind of descending carrier network and transmission downlink data thereof especially.
Background technology
Multicast and broadcasting are a kind of technology that transmits data from a data source to a plurality of targets.In traditional mobile communications network, sub-district multicast service or broadcasting service (CBS, Cell Broadcast Service) allow low bit rate data to share broadcast channel to all users' transmissions by the sub-district, and this kind business belongs to information series business.
At present, people no longer are satisfied with phone and messaging service to the demand of mobile communication, and along with the fast development of internet (Internet), a large amount of mobile multi-media services emerge.The some of them mobile multi-media service requires a plurality of users can receive identical data, for example video request program, television broadcasting, video conference, online education, interactive game etc. simultaneously.These mobile multi-media services are compared with general data service, have characteristics such as data volume is big, longer duration, delay sensitive.Present Internet protocol (IP) multicast and broadcast technology only are applicable to wired IP communication network, be not suitable for mobile communications network, because mobile communications network has particular network structure, functional entity and wave point, these are all different with the wire communication IP network.
At present, (Multimedia Broadcast Multicast Service MBMS) becomes and has one of business of bright spot in the current business most multimedia broadcast multi-broadcasting business, becomes the research focus of numerous equipment vendors.
In order to effectively utilize the mobile communications network resource, current MBMS transmission network framework is based on the architectural framework of original mobile radio communication, and existing network carried out suitable transformation and upgrading, considered the transmission of MBMS business for the standard of new formulation.Promptly in current communication network, provide the point-to-multipoint service of a data source, realize that Internet resources are shared, the raising utilization rate of network resource to a plurality of users send data.
Fig. 1 is the independent descending carrier schematic network structure based on the mobile network.
As shown in Figure 1, be on original mobile network architecture, to increase the broadcast group broadcast control unit based on mobile network's independent descending carrier network configuration, be used to set up or discharge the session connection of broadcasting/packet service, the business datum that transmission is relevant.This network configuration comprises broadcast group broadcast control unit, radio network controller (RNC) and more than one base station (Node B).Each Node B comprises a main Node B and a forward functionality again, and is not shown.
By such scheme as can be known, present independent descending carrier network needs a plurality of Node B if cover a zone fully, and also needs to increase the interface of Node B in the networking process.Therefore, the networking cost is just very high.
Because the wireless frequency of independent descending carrier network often can be not the same with the frequency of original mobile network, like this, the data that send broadcast/group broadcast are to carry out on a frequency band, and the business that sends general mobile network is to carry out on a frequency band outside order.Bring very big complexity can for so original system, as the method that adopts frequency to converge among the WCDMA R6.
And, when the wireless access technology of general mobile network adopts different access technologies with broadcast/group broadcast, adopt Wideband Code Division Multiple Access (WCDMA) (WCDMA) technology as existing 3G (Third Generation) Moblie, and the access way that requires broadcast/group broadcast adopts OFDM (OFDM) technology, therefore, this need rebulid new communication network, and sets up a mobile network with the cost that costs a lot of money just to satisfying broadcasting/packet service.
Summary of the invention
In view of this, the object of the present invention is to provide the method for a kind of descending carrier network and transmission downlink data thereof, make its networking cost minimization and can satisfy professional needs.
In order to achieve the above object, the method that the invention provides a kind of descending carrier network and divide the transmission downlink data.
A kind of descending carrier network is achieved in that
A kind of descending carrier network comprises: connect the broadcast group broadcast radio network controller, at least one base station of core network, the retransmission unit that links to each other with receiving equipment more than, wherein, the broadcast group broadcast radio network controller links to each other with described base station, and each base station links to each other with an above retransmission unit;
The broadcast group broadcast radio network controller is used for the broadcast/group broadcast data from core network are sent to the base station;
The base station is used for sending to the retransmission unit that links to each other with the base station to after handling from the broadcast/group broadcast data of broadcast group broadcast radio network controller;
Retransmission unit is used for to the broadcast/group broadcast data of receiving equipment forwarding from the base station.
Described retransmission unit is a far-end RF module, or is the repeater, or comprises at least one far-end RF module and at least one repeater.
When described retransmission unit comprises at least one far-end RF module and at least one repeater,
Described base station links to each other with at least one first far-end RF module;
At least one described first far-end RF module links to each other with second repeater, or described base station links to each other with at least one first repeater;
Wherein, be first far-end RF module with the far-end RF module that the base station directly links to each other, be first repeater with the repeater that the base station directly links to each other, what link to each other indirectly with the base station is second repeater.
Described first far-end RF module links to each other with second far-end RF module;
Wherein, be second far-end RF module with the far-end RF module that the base station links to each other indirectly.
When described retransmission unit is far-end RF module, adopt optical fiber, cable or twisted-pair feeder to connect between described base station and the far-end RF module, and the broadcast/group broadcast data that described base station sends to retransmission unit are baseband signal.
When described retransmission unit is far-end RF module, link to each other by a connecting line between described base station and the far-end RF module, and the base station also further comprises the multiple connection functional unit that described far-end RF module also further comprises separates the multiple connection functional unit.
When described retransmission unit is the repeater, connect by optical fiber between described base station and the repeater, and the data that described base station sends to retransmission unit are radiofrequency signal.
When described retransmission unit is the repeater, connect by wave point between described base station and the repeater.
Described base station is given the repeater by frequency shift technique with transmission of wireless signals.
Described repeater is used for directly amplifying the wireless signal from the base station.
A kind of method that sends downlink data in above-mentioned descending carrier network is achieved in that
A kind of method that sends downlink data in above-mentioned network comprises:
A. the broadcast group broadcast radio network controller will send to the base station from the broadcast/group broadcast data of core network;
B. the base station sends to the retransmission unit that links to each other with the base station after the broadcast/group broadcast data are handled;
C. retransmission unit is gone out the broadcast/group broadcast data forwarding that receives.
When retransmission unit was far-end RF module, step B comprised:
B11, base station to the broadcast/group broadcast data that receive dispatch, code interleaving, generate baseband signal;
B12, base station send to far-end RF module with this baseband signal;
Step C comprises:
C11, far-end RF module carry out filtering, frequency conversion, amplification to the baseband signal of receiving;
Signal after C12, far-end RF module will amplify by self antenna is launched.
When retransmission unit is the repeater,
Step B comprises:
B21, base station dispatch, generate radiofrequency signal after code interleaving and the radio frequency processing the broadcast/group broadcast data that receive;
B22, base station send to the repeater with this radiofrequency signal.
Among the step B22 base station by and the repeater between wireless connections or optical fiber this radiofrequency signal is sent to the repeater.
The base station sends to the repeater by frequency shift technique with this radiofrequency signal among the step B22.
As seen through the above technical solutions, the networking that provides of the present invention can reduce main Node B equipment, has simplified the network configuration of descending carrier, makes it the networking cost minimization and can satisfy professional needs.
Description of drawings
Fig. 1 is the independent descending carrier schematic network structure based on the mobile network;
Fig. 2 is a descending carrier schematic network structure of the present invention;
Fig. 3 is the schematic flow sheet of the inventive method;
Fig. 4 is the structural representation of the embodiment one of networking of the present invention;
Fig. 5 is the structural representation based on the embodiment of Fig. 4 networking;
Fig. 6 is the structural representation of the embodiment two of networking of the present invention;
Fig. 7 is the structural representation of the embodiment three of networking of the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
Referring to shown in Figure 2, descending carrier network of the present invention comprises: connect the broadcast group broadcast radio network controller 201, at least one main Node B 202 of core network, the retransmission unit 203 that links to each other with receiving equipment more than, wherein, broadcast group broadcast radio network controller 201 links to each other with described Node B202, and each Node B202 links to each other with an above retransmission unit 203; Broadcast group broadcast radio network controller 201 is used for the broadcast/group broadcast data from core network are sent to Node B202; Node B202 is used for sending to the retransmission unit 203 that links to each other with self to after handling from the data of broadcast group broadcast radio network controller 201; Retransmission unit 203 is used for to the data of receiving equipment forwarding from Node B202.And retransmission unit 203 can or comprise at least one far-end RF module and at least one repeater for far-end RF module, repeater.The broadcast group broadcast radio network controller comprises broadcast group broadcast controller and radio network controller, and function is same as the prior art, can be separately realizes as an entity, also may reside in to exist in the different rooms in the entity.
And, below will be called first far-end RF module with the far-end RF module that the base station directly links to each other, be called second far-end RF module with the far-end RF module that the base station links to each other indirectly, be called first repeater with the repeater that the base station directly links to each other, be called second repeater with the repeater that the base station links to each other indirectly.
When retransmission unit comprised at least one far-end RF module and at least one repeater, the base station linked to each other with at least one first far-end RF module; At least one first far-end RF module links to each other with second repeater, or the base station links to each other with at least one first repeater;
Further, described first far-end RF module can also link to each other with second far-end RF module;
Among the present invention, each retransmission unit 203 covers certain zone, thereby guarantees to adopt a plurality of retransmission units to cover an area, thereby guarantees that user terminal can receive the broadcast/group broadcast data in each zone in this area.
Referring to shown in Figure 3, based on networking structure shown in Figure 2, the method that sends downlink data may further comprise the steps:
Step 301: after the broadcast group broadcast radio network controller is received the broadcast/group broadcast data of core network, these broadcast/group broadcast data are sent to Node B.
Step 302:Node B sends to coupled retransmission unit after handling after to these broadcast/group broadcast data.
Step 303: each retransmission unit sends the broadcast/group broadcast data of receiving.
The present invention can adopt that radio frequency zooms out, repeater and mix the repeater and radio frequency technology such as zoom out sends receiving the broadcast/group broadcast data.
Lift specific embodiment one below and describe technical scheme of the present invention in detail.
Embodiment one adopts the radio frequency remote technology that the broadcast/group broadcast data are transmitted.
Referring to shown in Figure 4, the networking structure of present embodiment comprises broadcast group broadcast radio network controller, one or more main Node B and a plurality of RRU.
Directly adopt optical fiber, cable or twisted-pair feeder to connect between main Node B and the RRU, and Chuan Shu data are baseband signals between the two.The broadcast group broadcast radio network controller can be an entity, also can be different functional unit separately, mainly is in charge of session, leading subscriber CAMEL-Subscription-Information and business datum is carried out function such as associated encryption.Main Node B mainly is responsible for the scheduling of broadcasting/packet service, functions such as code interleaving, and export to RRU with baseband signal, and RRU carries out function such as filtering, frequency conversion, amplification and by antenna signal is launched to baseband signal, and each RRU module covers a zone.
Further, the RRU in two neighboring coverage areas can with the public connecting line of main Node B, like this, need to comprise the multiple connection functional unit among the main Node B, comprise in the RRU side and separate multiple connection functional unit (DM).
For example: in an area, suppose to have six RRU just can cover fully, as shown in Figure 5, the network that this area carries out descending carrier comprises a main Node B, a broadcast group broadcast radio network controller and six RRU, is respectively RRU0, RRU1, RRU2, RRU3, RRU4, RRU5.Wherein, main Node B adopts optical fiber to be connected with each RRU.Because RRU0 and RRU1 are adjacent overlay areas, optical fiber of employing is connected between RRU0 and RRU1 and the Node B, and therefore, main NodeB further comprises a Multi-connection unit; Also further comprise a DM at RRU0 and RRU1 side.Equally, RRU2, RRU3 and RRU4 also are adjacent overlay areas, and three and Node B also use an optical fiber, therefore, also comprise a DM at RRU2, RRU3 and RRU4 side.
The process that present embodiment sends downlink data is as follows:
Steps A: the session connection of setting up broadcasting multicast service between broadcast group broadcast radio network controller and the Node B, and the broadcast/group broadcast data are sent to main Node B.
Step B: dominant base to the broadcast/group broadcast data that receive dispatch, code interleaving, generate baseband signal, and this baseband signal sent to far-end RF module.
Step C: remote radio unit (RRU) carries out radio frequency processing to baseband signal, as: D/A conversion, and filtering, frequency conversion, the processing of radio-frequency modules such as amplifications, the signal after will amplifying by self antenna is then launched.
Lift specific embodiment two below and describe technical scheme of the present invention in detail.
Embodiment two employing repeater technology are carried out networking to the network of independent descending carrier.
As shown in Figure 6, the descending carrier network of present embodiment comprises broadcast group broadcast radio network controller 501, one or several main Node B502 and an above repeater 503.Each main Node B502 links to each other with a plurality of repeaters 503, and each repeater 503 covers a zone.Optical fiber, wireless connections are directly adopted in main Node B 502 and repeater 503, and Chuan Shu data are radiofrequency signals between the two.Broadcast group broadcast radio network controller 501 can be an entity, and also functional module independently mainly is in charge of session, leading subscriber CAMEL-Subscription-Information, functions such as the associated encryption of business datum.The main NodeB 502 main functions of being responsible for scheduling, code interleaving and the radio frequency processing of broadcasting/packet service, and finally give repeater 503 with broadcast multicast data sending with radiofrequency signal, repeater 503 is crossed antenna signal is launched.
Be connected by optical fiber, shift frequency and methods such as directly amplifying wireless signal between repeater and the Node B.
As: repeater 0 is connected by the method for shift frequency with Node B among Fig. 6, and promptly Node B moves radio frequency signal on the f2 to from the frequency of f1, and launch it after receiving signal on the f2 repeater 0 again on f1.Repeater 1 and repeater 2 are connected by optical fiber, and promptly Node B sends to repeater 1 and repeater 2 with radio frequency signal by optical fiber.Repeater 3 directly adopts the mode of the wireless signal that amplifies Node B to connect.
Networking shown in Figure 6 realizes that the process of downlink data forwarding is as follows:
Steps A: the session connection of setting up broadcasting multicast service between broadcast group broadcast radio network controller and the Node B, and the broadcast/group broadcast data are sent to main Node B.
Step B: after main Node B handles the broadcast/group broadcast data of receiving, generate radiofrequency signal, and give the repeater with broadcast multicast data sending with radiofrequency signal.Here, dominant base can by and the repeater between wireless connections or optical fiber this radiofrequency signal is sent to the repeater.And if adopt wireless connections between dominant base and the repeater, dominant base sends to the repeater by frequency shift technique with this radiofrequency signal.
Step C: launch the radiofrequency signal of receiving the repeater by antenna.
For embodiment three technical scheme of the present invention is described once more below.
Embodiment three use mixing repeaters and radio frequency remote technology carry out networking to the network of independent descending carrier.Because far-end RF module mainly is to general overlay area, when this regional landform more complicated,, replenish and adopt the repeater as in the subway station, when the shadow fading that causes of subterranean tunnel and building is bigger, to increase the coverage rate of this area, to solve the weak problem of signal that causes the blind area.
As shown in Figure 7, one or several main Node B are arranged in an area, main Node B wireless coverage area adopts repeater and radio frequency remote technology to carry out mixed networking.The networking structure of present embodiment comprises: broadcast group broadcast radio network controller, one or more main Node B, RRU, RRU0, RRU1, RRU2 and repeater 0, repeater 1, repeater 2, repeater 3 and repeater 4.Wherein, main Node B links to each other with RRU, RRU0, RRU1, RRU2 and repeater 4, and RRU0, RRU1 adopt same optical fiber to link to each other with main Node B; RRU links to each other with repeater 0, repeater 1; RRU1 links to each other with repeater 3 with repeater 2 again.
Steps A: the session connection of setting up broadcasting multicast service between broadcast group broadcast radio network controller and the main Node B, and the broadcast/group broadcast data are sent to main Node B.
Step B: after main Node B handles the broadcast/group broadcast data of receiving, generate radiofrequency signal, and give repeater 4 with broadcast multicast data sending with radiofrequency signal; Simultaneously the broadcast/group broadcast data of receiving are handled and obtained baseband signal, and this baseband signal is sent to RRU, RRU0, RRU1, RRU2.
Step C: launch the radiofrequency signal of receiving repeater 4 by antenna; RRU2 sends the baseband signal of receiving.Behind RRU, the RRU1 As-received band signal, baseband signal is carried out filtering, amplify, radio frequency processing is handled in frequency conversion etc., launches by antenna at last.
In a word, the above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (15)
1, a kind of descending carrier network, it is characterized in that: this network comprises: connect the broadcast group broadcast radio network controller, at least one base station of core network, the retransmission unit that links to each other with receiving equipment more than, wherein, the broadcast group broadcast radio network controller links to each other with described base station, and each base station links to each other with an above retransmission unit;
The broadcast group broadcast radio network controller is used for the broadcast/group broadcast data from core network are sent to the base station;
The base station is used for sending to the retransmission unit that links to each other with the base station to after handling from the broadcast/group broadcast data of broadcast group broadcast radio network controller;
Retransmission unit is used for to the broadcast/group broadcast data of receiving equipment forwarding from the base station.
2, network according to claim 1 is characterized in that, described retransmission unit is a far-end RF module, or is the repeater, or comprises at least one far-end RF module and at least one repeater.
3, network according to claim 2 is characterized in that, when described retransmission unit comprises at least one far-end RF module and at least one repeater,
Described base station links to each other with at least one first far-end RF module;
At least one described first far-end RF module links to each other with second repeater, or described base station links to each other with at least one first repeater;
Wherein, be first far-end RF module with the far-end RF module that the base station directly links to each other, be first repeater with the repeater that the base station directly links to each other, what link to each other indirectly with the base station is second repeater.
4, network according to claim 3 is characterized in that, described first far-end RF module links to each other with second far-end RF module;
Wherein, be second far-end RF module with the far-end RF module that the base station links to each other indirectly.
5, network according to claim 1, it is characterized in that, when described retransmission unit is far-end RF module, adopt optical fiber, cable or twisted-pair feeder to connect between described base station and the far-end RF module, and the broadcast/group broadcast data that described base station sends to retransmission unit are baseband signal.
6, network according to claim 1, it is characterized in that, when described retransmission unit is far-end RF module, link to each other by a connecting line between described base station and the far-end RF module, and, the base station also further comprises the multiple connection functional unit, and described far-end RF module also further comprises separates the multiple connection functional unit.
7, network according to claim 1 is characterized in that, when described retransmission unit is the repeater, connect by optical fiber between described base station and the repeater, and the data that described base station sends to retransmission unit is radiofrequency signal.
8, network according to claim 1 is characterized in that, when described retransmission unit is the repeater, connects by wave point between described base station and the repeater.
9, network according to claim 8 is characterized in that, described base station is given the repeater by frequency shift technique with transmission of wireless signals.
10, network according to claim 8 is characterized in that, described repeater is used for directly amplifying the wireless signal from the base station.
11, a kind of method that sends downlink data in the described network of claim 1 is characterized in that this method may further comprise the steps:
A. the broadcast group broadcast radio network controller will send to the base station from the broadcast/group broadcast data of core network;
B. the base station sends to the retransmission unit that links to each other with the base station after the broadcast/group broadcast data are handled;
C. retransmission unit is gone out the broadcast/group broadcast data forwarding that receives.
12, method according to claim 11 is characterized in that, when retransmission unit was far-end RF module, step B comprised:
B11, base station to the broadcast/group broadcast data that receive dispatch, code interleaving, generate baseband signal;
B12, base station send to far-end RF module with this baseband signal;
Step C comprises:
C11, far-end RF module carry out filtering, frequency conversion, amplification to the baseband signal of receiving;
Signal after C12, far-end RF module will amplify by self antenna is launched.
13, method according to claim 11 is characterized in that, when retransmission unit is the repeater,
Step B comprises:
B21, base station dispatch, generate radiofrequency signal after code interleaving and the radio frequency processing the broadcast/group broadcast data that receive;
B22, base station send to the repeater with this radiofrequency signal.
14, method according to claim 13 is characterized in that, among the step B22 base station by and the repeater between wireless connections or optical fiber this radiofrequency signal is sent to the repeater.
15, method according to claim 13 is characterized in that, the base station sends to the repeater by frequency shift technique with this radiofrequency signal among the step B22.
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| CN101179325B (en) * | 2007-11-09 | 2011-05-11 | 中国移动通信集团福建有限公司 | Wireless signal uniform distribution apparatus for tunnel |
| CN101516062B (en) * | 2008-02-20 | 2013-08-21 | 中兴通讯股份有限公司 | Resource allocation method for multicast services of multimedia broadcast in nontransparent relay station mode |
| CN101516063B (en) * | 2008-02-21 | 2012-10-10 | 中兴通讯股份有限公司 | Multimedia broadcast and multicast service transmitting method |
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| US6751224B1 (en) * | 2000-03-30 | 2004-06-15 | Azanda Network Devices, Inc. | Integrated ATM/packet segmentation-and-reassembly engine for handling both packet and ATM input data and for outputting both ATM and packet data |
| US6763025B2 (en) * | 2001-03-12 | 2004-07-13 | Advent Networks, Inc. | Time division multiplexing over broadband modulation method and apparatus |
| CN1582001A (en) * | 2003-07-31 | 2005-02-16 | 华为技术有限公司 | Method for high-frequency amplifying station to gain switching point in TD-SCDMA system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6751224B1 (en) * | 2000-03-30 | 2004-06-15 | Azanda Network Devices, Inc. | Integrated ATM/packet segmentation-and-reassembly engine for handling both packet and ATM input data and for outputting both ATM and packet data |
| US6763025B2 (en) * | 2001-03-12 | 2004-07-13 | Advent Networks, Inc. | Time division multiplexing over broadband modulation method and apparatus |
| CN1582001A (en) * | 2003-07-31 | 2005-02-16 | 华为技术有限公司 | Method for high-frequency amplifying station to gain switching point in TD-SCDMA system |
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