CN102547716B

CN102547716B - Wireless communication system and method for flat network architecture and extend unit

Info

Publication number: CN102547716B
Application number: CN201210005089.1A
Authority: CN
Inventors: 胡应添; 张远见; 张跃军
Original assignee: Comba Telecom Systems China Ltd
Current assignee: Comba Network Systems Co Ltd
Priority date: 2012-01-06
Filing date: 2012-01-06
Publication date: 2015-06-10
Anticipated expiration: 2032-01-06
Also published as: CN102547716A

Abstract

The invention discloses a wireless communication system and a wireless communication method for a flat network architecture, and an extend unit. The wireless communication system comprises access unit (AU) subsystems, the EU and at least one radio remote unit (RU) connected with the EU. The EU is used for converting a downlink baseband high-speed signal transmitted by the AU subsystem into a downlink sub-baseband low-speed signal, and transmitting the downlink sub-baseband low-speed signal to the RU, so that the EU can be connected with the RU by a low-speed transmission link such as a category-5 cable, indoor coverage is facilitated, and difficulty and cost in network deployment are reduced; the wireless communication system supports the concatenation and stacking mode of the AU subsystems, so that the capacity extensibility of the system is improved; and in addition, the wireless communication system also can comprise a gateway (GW) subsystem, and the function of a radio network controller (RNC) is shifted down to the GW subsystem and the AU subsystem to further disintegrate and simplify the structure of the whole communication system, so that a network processing time delay and a transmission time delay are shortened.

Description

A kind of wireless communication system of the flattening network architecture, method and expanding unit

Technical field

The present invention relates to wireless communication technology field, particularly relate to a kind of wireless communication system of the flattening network architecture, method and expanding unit.

Background technology

At present at wireless communication technology field, as Generation Mobile Telecommunication System technology (2 ^ndgeneration, 2G) and G mobile communication (3 ^rdgeneration, 3G) field, the mode of general employing macro base station disposes wireless communication system, the auxiliary covering realizing wireless signal with indoor distributed antenna system and repeater, as for global system for mobile communications (Global System for Mobile Communications, GSM), general employing base station controller (Base Station Controller, and the wireless coverage mode of base transceiver station (BaseTransceiver Station, BTS) BSC); And in 3G field, then generally adopt the wireless coverage mode of baseband processing unit (Base Band Unit, BBU) and Remote Radio Unit (Radio Remote Unit, RRU).

As shown in Figure 1, be the structural representation of wireless communication system in existing 3G field, described system is primarily of the composition such as radio network controller (Radio Network Controller, RNC), BBU, RRU.

The BBU of described system has been mainly used to the Base-Band Processing function (as coding, multiplexing, modulation and spread spectrum etc.) of Uu interface (Interface between the NodeB andthe UE), Iub interface (the Interface between the RNC and the BBU) function of RNC, signaling process, local and remote Operation and Maintenance function, and the Working Status Monitoring of NodeB system and warning information reporting functions.

The RRU of described system is integrated with data intermediate frequency module, Transceiver Module, power amplifier and filtration module, wherein data intermediate frequency module is used for the modulation /demodulation, Digital up and down convert, A/D, D/A conversion etc. of optical transport, Transceiver Module is for completing the conversion of intermediate-freuqncy signal to radiofrequency signal, power amplifier and filtration module then for by radiofrequency signal after power amplifier and filtering, launched by antenna opening.

In wireless communication system as shown in Figure 1, it is interconnected that described RNC realizes with core net by Iu interface (Interface betweenthe Core Network and the RNC), realize with BBU by Iub interface interconnected, and realize management to BBU and control by Iub interface; It is interconnected that described BBU realizes with RRU by the high-speed transmission link such as optical fiber, as adopted the interface protocols such as communication protocol IR (Interface betweenthe RRU and the BBU)/CPRI (Common Public Radio the Interface)/OBASI (OpenBase Station Architecture Initiative) of standard; Described RRU is interconnected by Uu Interface realization and user terminal.

In above-mentioned wireless communication system, owing to connecting based on high-speed transmission link such as optical fiber between BBU and RRU, therefore, RRU could be installed in the place needing fiber deployment, and network system disposes difficulty, and cost is higher.

In addition, due to GSM be most widely used at present, communication network that benefit is best, by long-term existence within a very long time, and along with the continuous increase of GSM network number of users and the continuous expansion of business, existing GSM network needs constantly dilatation and optimization, with the demand of the needs and ever-increasing GSM network user that meet business development.But, GSM network dilatation is faced with base station selection difficulty, many predicaments such as indoor coverage of signal access is complicated, and along with the fast development of mobile communication, the network architecture progressively evolution of mobile communication system, Long Term Evolution (the Long Term Evolution of all-IP is developed into gradually from the open network architedure of GSM complexity, LTE) the flattening network architecture, therefore, on the basis of existing technology, need to provide a kind of new wireless communication system meeting the development trend of future mobile communications, solve above-mentioned 2G, the problems existed in 3G communication system.

The technical scheme that multiple BBU is directly connected to the distributed BBU of RNC is there is in prior art, in this network architecture system, when system needs dilatation, need to be configured in RRU and RNC, to set up the relation of carrier wave and corresponding BBU, that is, if the upper support of RRU 100 carrier waves, and in described system, have two distributed BBU, then need front 50 carrier waves to be configured in process on first BBU, rear 50 carrier waves are configured on second BBU and process; And in the embodiment of the present invention three, when AU subsystem finds to meet current carrier requirement, process automatically carrier data being assigned to from AU subsystem, without the need to arranging GW subsystem or EU, RU etc., therefore, networking mode more flexibly, facilitate System Expansion; Meanwhile, from engineering installation angle, the networking mode that in the embodiment of the present invention three, AU subsystem is stacking, respectively from AU subsystem without the need to being connected with GW subsystem, EU or RU, thus decrease network erection difficulty and the waste of resource.

Summary of the invention

Embodiments provide a kind of wireless communication system of the flattening network architecture, method and expanding unit, dispose the problem of difficulty in order to solve the network system existed in prior art.

A kind of wireless communication system of the flattening network architecture, at least one radio frequency extension apparatus (the RadioRemote Unit comprising access (Access Unit, AU) subsystem, expanding unit (Extend Unit, EU) and be connected with EU, RU), wherein:

Described AU subsystem, for by gateway (Gateway, GW) the GW downlink data that subsystem sends is converted to downgoing baseband high speed signal and is sent to EU, and, the uplink baseband high speed signal that EU sends is converted to GW upstream data and is transferred to core net by GW subsystem;

Described EU, downgoing baseband high speed signal for being sent by AU subsystem decomposes, obtain multichannel descending subbase band high speed signal, and after described descending subbase band high speed signal is converted to descending subbase band low speed signal, be sent to described RU, and, the up subbase band low speed signal that RU sends is converged and is sent to AU subsystem after being converted to uplink baseband high speed signal;

Described RU, descending subbase band low speed signal frequency conversion for being sent by EU is far-end downlink radio-frequency signal, and sends to user terminal, and, receive the far-end upstream radio-frequency signal that user terminal sends, and be sent to EU after up subbase band low speed signal by this far-end upstream radio-frequency signal frequency conversion.

A kind of EU, comprises processing unit and converting unit:

Described processing unit, for decomposing the downgoing baseband high speed signal received, obtains multichannel descending subbase band high speed signal, and send to converting unit, and, the up subbase band low speed signal received is converged as after uplink baseband low speed signal, sends to converting unit;

Described converting unit, exports after the descending subbase band high speed signal for being sent by processing unit is converted to descending subbase band low speed signal, and, export after the uplink baseband low speed signal that processing unit sends is converted to uplink baseband high speed signal.

A kind of AU subsystem, comprising:

Receiving element, for receiving GW downlink data and uplink baseband high speed signal;

Converting unit, is converted to downgoing baseband high speed signal for the described GW downlink data received by receiving element, and the described uplink baseband high speed signal received by receiving element is converted to GW upstream data;

Transmitting element, for sending the downgoing baseband high speed signal and GW upstream data that converting unit is converted to.

A wireless communications method for the flattening network architecture, described method comprises:

AU subsystem is sent to EU after the GW downlink data that GW subsystem sends is converted to downgoing baseband high speed signal;

Described downgoing baseband high speed signal decomposes by EU, obtains multichannel descending subbase band high speed signal, and after described descending subbase band high speed signal is converted to descending subbase band low speed signal, is sent to RU;

RU sends to user terminal after far-end downlink radio-frequency signal.

The far-end upstream radio-frequency signal frequency conversion that user terminal sends by RU is be sent to EU after up subbase band low speed signal;

Described up subbase band low speed signal converges and is sent to AU subsystem after being converted to uplink baseband high speed signal by EU;

AU subsystem is transferred to core net by GW subsystem after described uplink baseband high speed signal is converted to GW upstream data.

Beneficial effect of the present invention is:

Embodiments provide a kind of wireless communication system of the flattening network architecture, method and expanding unit, at least one RU that described wireless communication system comprises AU subsystem, EU and is connected with EU, by utilizing EU the downgoing baseband high speed signal that AU subsystem sends be converted to descending subbase band low speed signal and send to RU, make between EU and RU, to adopt the low speed transmissions links such as category-5 cable to connect, be convenient to in-door covering, reduce difficulty and the cost of network design.

Accompanying drawing explanation

Figure 1 shows that the structural representation of existing 3G wireless communication system;

Figure 2 shows that the wireless communication system architecture schematic diagram of the flattening network architecture in the embodiment of the present invention one;

Figure 3 shows that in the embodiment of the present invention two the wireless communication system architecture schematic diagram of the networking mode adopting the cascade of AU subsystem;

Figure 4 shows that in the embodiment of the present invention three the wireless communication system architecture schematic diagram of the networking mode adopting AU subsystem stacking;

Figure 5 shows that the structural representation of expanding unit in the embodiment of the present invention four;

Figure 6 shows that the wireless communication system architecture schematic diagram of the networking mode adopting EU cascade;

Figure 7 shows that the structural representation of AU subsystem in the embodiment of the present invention five;

Figure 8 shows that the wireless communications method schematic flow sheet of the flattening network architecture in the embodiment of the present invention six;

Figure 9 shows that transmission data data structure schematic diagram in a single sub-frame;

Figure 10 shows that CPRI package mode data structure schematic diagram.

Embodiment

Embodiments provide a kind of wireless communication system of the flattening network architecture, method and expanding unit, existing wireless network communications system structure is decomposed further and simplified, the function of RNC is moved down into GW subsystem and AU subsystem, and add EU, RU is sent to after utilizing described EU that the downgoing baseband high speed signal that AU subsystem sends is converted to descending subbase band low speed signal, make between EU and RU, to adopt the low speed transmissions links such as category-5 cable to connect, without the need to based on return networks such as jumbo optical fiber, be convenient to in-door covering, reduce difficulty and the cost of network design, further, the cascade of AU subsystem and the folded pattern of group can be supported by the scheme of the embodiment of the present invention, improve the extendible capacity of system.

Below in conjunction with Figure of description, embodiments of the present invention is further illustrated, but the present invention is not limited to the following examples.

Embodiment one:

As shown in Figure 2, for the wireless communication system architecture schematic diagram of the flattening network architecture in the embodiment of the present invention one, described wireless communication system comprises: AU subsystem 11, EU12 and at least one RU13 be connected with EU12, described wireless communication system can also comprise GW subsystem 14.

Described wireless communication system can support multiple wireless transmission standard, comprise global system for mobile communications (Global System of Mobile communication, GSM), Wideband Code Division Multiple Access (WCDMA) (WidebandCode Division Multiple Access, WCDMA), TD SDMA (TimeDivision-Synchronous Code Division Multiple Access, TD-SCDMA), Long Term Evolution (Long Term Evolution, LTE), WLAN (Wireless Local Area Networks, WLAN) etc., described wireless communication system can support the signal transacting of above arbitrary standard, also can support the mixed processing of the multi-signal of above multiple types simultaneously, and also, described wireless communication system can support the process of single mode or multimode signal, particularly, the GW subsystem 14 of described wireless communication system, AU subsystem 11, EU12 and RU13 can support the signal transacting of above arbitrary standard, also can support the signal transacting of above multiple types, namely described GW subsystem 14, AU subsystem 11, EU12 and RU13 are the radio communication subsystem can supporting single mode or multimode simultaneously.

Described AU subsystem 11 is converted to downgoing baseband high speed signal for the GW downlink data (comprising signaling plane and user face) sent by GW subsystem 14 and is sent to EU12, and, the uplink baseband high speed signal that EU12 sends is converted to GW upstream data and is transferred to core net by GW subsystem 14.

Particularly, described AU subsystem 11 comprises BBU and top level control unit, is equivalent to the function being integrated with part RNC and NodeB, or the function of part BSC and BTS; Wherein said BBU comprises the functions such as encoding and decoding, modulation /demodulation, de-interleaving intertexture, encrypting and decrypting, frequency hopping, timing controlled, framing solution frame, the GW downlink data received is mainly used in carry out Base-Band Processing, obtain downgoing baseband high speed signal, and the uplink baseband high speed signal received is converted to GW upstream data; Described top level control unit comprises the functions such as RRM, mobile management, medium education (Media Access Control, MAC), wireless spread-spectrum technology (Radio Link Control, RLC); Meanwhile, described AU subsystem 11 also has the Working Status Monitoring of Iuh interface function, local and remote Operation and Maintenance function and AU subsystem 11 and warning information and the function such as to report.

The downgoing baseband high speed signal that described EU12 is used for AU subsystem 11 to send decomposes, obtain multichannel descending subbase band high speed signal, and after described descending subbase band high speed signal is converted to descending subbase band low speed signal, be sent to described RU13, and the up subbase band low speed signal that RU13 sends converged and is sent to AU subsystem 11 after being converted to uplink baseband high speed signal.

Particularly, described EU12 comprises processing unit and converting unit:

The downgoing baseband high speed signal that described processing unit is used for AU subsystem 11 to send decomposes, obtain multichannel descending subbase band high speed signal, and send to converting unit, and, the up subbase band low speed signal sent by RU13 converges as after uplink baseband low speed signal, sends to converting unit; The descending subbase band high speed signal that described converting unit is used for processing unit sends is converted to descending subbase band low speed signal, and be sent to described RU13, and, after the uplink baseband low speed signal that processing unit sends is converted to uplink baseband high speed signal, be sent to AU subsystem 11.

Further, descending for multichannel subbase band high speed signal also for respectively for the load capacity of described RU13, combines by described processing unit, obtains the descending subbase band high speed signal after many group superpositions, and sends to converting unit; Described converting unit is converted to the descending subbase band low speed signal of many groups specifically for the descending subbase band high speed signal after sent by processing unit many groups superpositions, and be sent to described RU13, wherein, the RU13 belonging to same community receives same group of descending subbase band low speed signal, and any two RU13 belonging to different districts receive the different descending subbase band low speed signal organized; Described multichannel descending subbase band high speed signal can be the signal of same standard, also can be the signal of multiple types; Descending subbase band high speed signal after described superposition can be described one or more descending subbase band high speed signal combination in any superposition.

Particularly, for WCDMA and GSM bimodulus, after the downgoing baseband high speed signal that AU subsystem 11 sends by described processing unit decomposes, obtain multichannel descending subbase band high speed signal, suppose that every road descending subbase band high speed signal includes the i/q signal of 3 road WCDMA and the i/q signal of 8 road GSM, processing unit is for the load capacity of described RU13, described multichannel descending subbase band high speed signal is combined, obtain the descending subbase band high speed signal after many group superpositions, suppose corresponding 3 RU13 of EU12.

(1) for division cell pattern, when namely each RU13 belongs to different districts:

EU12 is to be sent give the superposition of first RU13 after descending subbase band high speed signal a comprise: 1 road WCDMA i/q signal and 3 road GSM i/q signals;

EU12 is to be sent give the superposition of second RU13 after descending subbase band high speed signal b comprise: 2 road WCDMA i/q signals and 3 road GSM i/q signals;

EU12 is to be sent give the superposition of the 3rd RU13 after descending subbase band high speed signal c comprise: 2 road GSM i/q signals.

(2) for same cell pattern, when namely each RU13 belongs to same community:

EU12 is to be sent give the superposition of first RU13 after descending subbase band high speed signal a comprise: 3 road WCDMA i/q signals and 8 road GSM i/q signals;

EU12 is to be sent give the superposition of second RU13 after descending subbase band high speed signal b comprise: 3 road WCDMA i/q signals and 8 road GSM i/q signals;

EU13 is to be sent give the superposition of the 3rd RU13 after descending subbase band high speed signal c comprise: 3 road WCDMA i/q signals and 8 road GSM i/q signals.

It should be noted that, the stacked system of above-mentioned descending subbase band high speed signal is only illustrating of the embodiment of the present invention, in actual applications, can adjust according to cell conditions.

Further, descending subbase band high speed signal b after descending subbase band high speed signal a after described superposition, superposition and the descending subbase band high speed signal c after superposition encapsulates according to synchronous ethernet agreement by described converting unit respectively, obtain descending subbase band low speed signal a, descending subbase band low speed signal b and descending subbase band low speed signal c, and described descending subbase band low speed signal a is sent to first RU13, descending subbase band low speed signal b is sent to second RU13, descending subbase band low speed signal c is sent to the 3rd RU13.

It should be noted that, be not limited in the embodiment of the present invention adopt other agreements to encapsulate the descending subbase band low speed signal after described superposition, support as adopted the interface protocol of category-5 cable, CAT5E UTP cable or netting twine to as described in descending subbase band low speed signal after superposition encapsulate.

The descending subbase band low speed signal frequency conversion that described RU13 is used for EU12 to send is far-end downlink radio-frequency signal, and send to user terminal, and, receive the far-end upstream radio-frequency signal that user terminal sends, and be sent to EU12 after up subbase band low speed signal by this far-end upstream radio-frequency signal frequency conversion.

Described EU12 and at least one RU13 connected can be called coverage sub-system or multimode distributing antenna system (Multi-mode Distribution Antanna System, MDAS) subsystem; Described coverage sub-system is used for the downgoing baseband high speed signal that sent by AU subsystem 11 to carry out decomposing, recombinates and up-convert to the far-end downlink radio-frequency signal at least one road, realizes the quorum sensing inhibitor to overlay area; And the far-end upstream radio-frequency signal down-conversion at least one road that the user terminal of overlay area sent, and again converge be combined as uplink baseband high speed signal after be sent to AU subsystem 11.

Particularly, descending subbase band low speed signal after described superposition and up subbase band low speed signal are the signal adapting to the low speed transmissions links such as category-5 cable, CAT5E UTP cable or netting twine, and described downgoing baseband high speed signal and uplink baseband high speed signal are the signal adapting to the high-speed transmission link such as optical fiber or data/address bus.

Described AU subsystem 11 can be connected by the high-speed transmission link such as optical fiber or data/address bus with EU12, when AU subsystem 11 and EU12 are two different equipment, adopt the high-speed transmission link such as optical fiber to connect between the two, accepted standard communication protocol can be the interface protocols such as IR/CPRI/OBSAI; When AU subsystem 11 and EU12 are same equipment, can be connected by data/address bus between the two.

Because EU12 achieves downgoing baseband high speed signal and descending subbase band low speed signal, and the transformation between up subbase band low speed signal and uplink baseband high speed signal, therefore AU subsystem 11 with adopt optical fiber or data/address bus to carry out being connected transmit high-speed signals between EU12 in, category-5 cable can be adopted between EU12 and RU13, the low speed transmissions such as CAT5E UTP cable or netting twine link connects, be different from the connected mode of the high-speed transmission link such as the optical fiber adopted between traditional BBU and RRU, can be good at the residence network resource of relying on existing deployment complete, do not need to lay optical fiber cable, register one's residence simple, be convenient to in-door covering, can the quick networking of low cost.

Described RU13 is connected with user terminal by standard interface (as the Uu interface of 3G or the Um Interface of GSM).

Described GW subsystem 14 is between AU subsystem 11 and core net, by gateway interface (as Iuh interface, Interface between the Gateway and the AU) be connected with AU subsystem 11, for realizing convergence and the forwarding of signaling and data between AU subsystem 11 and core net; GW subsystem 14 completes the communication interface core network access by standard after the convergence of signaling and data, as accessed the packet domain of CN, be accessed the circuit domain of CN by the communication interface (Iu-CS as 3GPP) of standard by the communication interface of standard (Iu-PS as 3GPP).

Further, described GW subsystem 14 also comprises the function of part RNC, comprises the functions such as the function of the mobility switching user face data supporting user terminal, idle pulley downlink grouped data buffer memory and paging support; Further comprises security gateway processing capacity, comprise support and develop and manage Internet protocol safety (IPSec) passage, for providing safe and reliable communications and access authentication etc. between AU subsystem 11 and GW subsystem 14.

Further, described wireless communication system also comprises nms subsystem 15:

Described nms subsystem 15 is connected with GW subsystem 14, AU subsystem 11, EU12 with RU13 by network management interface (network management interface as based on TR-069 agreement), realizes the management to GW subsystem 14, AU subsystem 11, EU12 and RU13 and control treatment; Described nms subsystem 15 can also realize the function such as user interface management, user management, user's fabric anomaly, software administration, log management, system maintenance, optimum configurations, alarm report to GW subsystem 14, AU subsystem 11, EU12 and RU13.

Embodiment two:

In wireless communication system described in the embodiment of the present invention, described AU subsystem can adopt the mode networking of cascade, as shown in Figure 3, for adopting the wireless communication system architecture schematic diagram of the networking mode of AU subsystem cascade, described wireless communication system comprises GW subsystem, multiple EU, at least one RU be connected with each EU and multiple AU subsystem, and each AU subsystem also comprises subtending port.

Particularly, each AU subsystem is connected successively by local subtending port, wherein, be arranged in primary AU subsystem to be connected with an AU subsystem by local subtending port with the AU subsystem being arranged in last, all the other AU subsystems are connected with two AU subsystems respectively by local subtending port, the EU that each AU subsystem is also corresponding with it respectively is simultaneously connected, and generally, each AU subsystem is all connected with GW subsystem.

As shown in Figure 3, described wireless communication system comprises three AU subsystems, is respectively AU subsystem 1, AU subsystem 2 and AU subsystem 3; Described AU subsystem 1 is connected with AU subsystem 2 by local subtending port; Described AU subsystem 2 is connected with AU subsystem 1, AU subsystem 3 respectively by local subtending port simultaneously; Described AU subsystem 3 is connected with AU subsystem 2 by local subtending port; Meanwhile, AU subsystem 1, AU subsystem 2 are all connected with GW subsystem by gateway interface with AU subsystem 3, and AU subsystem 1, AU subsystem 2 are connected with EU3 with corresponding EU1, EU2 respectively by high-speed transmission link such as optical fiber with AU subsystem 3.

For arbitrary AU subsystem, specifically for when the disconnecting of its next adjacent AU subsystem and GW subsystem, receive the GW downlink data that GW subsystem sends to next adjacent AU subsystem, and send it to next adjacent AU subsystem, and, by receiving next adjacent AU subsystem GW upstream data to be sent, and send it to GW subsystem.

If AU subsystem is to the disconnecting of GW subsystem, as shown in Figure 3, AU subsystem 2 is to (being represented by dotted lines the link failure of AU subsystem 2 and GW subsystem) during the link failure of GW subsystem, by the scheme of the embodiment of the present invention two, AU subsystem 1 can forward AU subsystem 2 to the GW upstream data of GW subsystem and GW subsystem to the GW downlink data of AU subsystem 2, thus ensure that the unobstructed of link, idiographic flow is as described below:

AU subsystem 1 receives the GW downlink data that GW subsystem sends to AU subsystem 2, and sends it to AU subsystem 2 by subtending port, and receives AU subsystem 2 GW upstream data to be sent by subtending port, and sends it to GW subsystem.

In the scheme of the embodiment of the present invention two, can be connected by optical fiber between each AU subsystem.

Embodiment three:

In wireless communication system described in the embodiment of the present invention, described AU subsystem can also adopt stacking mode networking, as shown in Figure 4, for the wireless communication system architecture schematic diagram of the networking mode that adopts AU subsystem stacking, described wireless communication system comprises GW subsystem, EU, at least one RU be connected with EU and multiple AU subsystem, one of them AU subsystem is main AU subsystem, and all the other AU subsystems are from AU subsystem, and each AU subsystem also comprises stacking interface.

Described main AU subsystem is connected with EU with GW subsystem respectively, is connected successively from AU subsystem by local stacking interface, and wherein first is connected with main AU subsystem from AU subsystem by stacking interface.

As shown in Figure 4, described wireless communication system comprises three AU subsystems, is respectively AU subsystem 1, AU subsystem 2 and AU subsystem 3, and described AU subsystem 1 is connected with GW subsystem by gateway interface, is connected with EU by high-speed transmission link such as optical fiber; Described AU subsystem 2 is connected with AU subsystem 3 with AU subsystem 1 respectively by stacking interface; Described AU subsystem 3 is connected with AU subsystem 2 by stacking interface.

Described main AU subsystem, for receiving the GW downlink data that GW subsystem sends, and according to the number of carriers that this locality can process, the carrier signal exceeding described number of carriers comprised in described GW downlink data is sent to from AU subsystem by stacking interface, and the GW downlink data do not sent to from AU subsystem is converted to downgoing baseband high speed signal, receive the downgoing baseband high speed signal after the conversion returned from AU subsystem, downgoing baseband high speed signal is sent to EU, and, receive the uplink baseband high speed signal that EU sends, and according to the number of carriers that this locality can process, the carrier signal exceeding described number of carriers comprised in described uplink baseband high speed signal is sent to from AU subsystem by stacking interface, and the uplink baseband high speed signal do not sent to from AU subsystem is converted to GW upstream data, receive the GW upstream data after the conversion returned from AU subsystem, GW upstream data is sent to GW subsystem,

Described from AU subsystem, for receiving main AU subsystem or the upper one GW downlink data sent from AU subsystem, and according to the number of carriers that this locality can process, the carrier signal exceeding the number of carriers that this locality can process comprised in described GW downlink data is sent to adjacent next from AU subsystem by stacking interface, and the GW downlink data not sending to next from AU subsystem is converted to downgoing baseband high speed signal, receive the downgoing baseband high speed signal after next conversion returned from AU subsystem, downgoing baseband high speed signal is sent to main AU subsystem or upper from AU subsystem, and, receive main AU subsystem or the upper one uplink baseband high speed signal sent from AU subsystem, and according to the number of carriers that this locality can process, the carrier signal exceeding the number of carriers that this locality can process comprised in described uplink baseband high speed signal is sent to adjacent next from AU subsystem by stacking interface, and the uplink baseband high speed signal not sending to next from AU subsystem is converted to GW upstream data, receive the GW upstream data after next conversion returned from AU subsystem, GW upstream data is sent to main AU subsystem or upper from AU subsystem.

Particularly, as shown in Figure 4, suppose that the number of carriers threshold value that can process that AU subsystem 1, AU subsystem 2 and AU subsystem 3 is preset is 10, then when the number of carriers included by the GW downlink data that GW subsystem sends to AU subsystem 1 is 30, AU subsystem 1 is forwarded to AU subsystem 2 by residue 20 carrier signals exceeding threshold value by stacking interface, and will the GW downlink data of AU subsystem 2 not sent to be converted to downgoing baseband high speed signal; AU subsystem 2 judges that 20 carrier signals also exceed its predetermined threshold value 10, therefore 10 carrier signals in 20 carrier signals is sent to AU subsystem 3, and will the GW downlink data of AU subsystem 3 not sent to be converted to downgoing baseband high speed signal; AU subsystem 3 processes 10 carrier signals that AU subsystem 2 sends, and the downgoing baseband high speed signal of the AU subsystem 3 obtained after treatment is transmitted to AU subsystem 2 by stacking interface, AU subsystem 2 is transmitted to AU subsystem 1 the downgoing baseband high speed signal that the downgoing baseband high speed signal obtained after self process and AU subsystem 3 send, and by AU subsystem 1, the downgoing baseband high speed signal that AU subsystem 1, AU subsystem 2 and AU subsystem 3 process is sent to EU;

When EU is 20 carrier waves to the uplink baseband high speed signal that AU subsystem 1 sends, AU subsystem 1 is forwarded to AU subsystem 2 by residue 10 carrier signals exceeding threshold value 10 by stacking interface, AU subsystem 2 obtains GW upstream data after receive 10 carrier signals being processed, and described GW upstream data is transmitted to AU subsystem 1, AU subsystem 1 by stacking interface the GW upstream data that the GW upstream data self processed and AU subsystem 2 process is sent to GW subsystem.

When adopting the mode networking that in the embodiment of the present invention three, AU subsystem is stacking, if system needs dilatation, then only need simply to increase multiple AU subsystem in the machine room of original erection AU subsystem, the disposal ability of system will be doubled and redoubled, and user can not be affected completely, thus make that the dilatation of system is more simple, dilatation cost is also reduced greatly.

Embodiment four:

As shown in Figure 5, be the structural representation of EU in the embodiment of the present invention four, described EU comprises processing unit 21 and converting unit 22.

Described processing unit 21 is for decomposing the downgoing baseband high speed signal received, obtain multichannel descending subbase band high speed signal, and send to converting unit 22, and, the up subbase band low speed signal received is converged as after uplink baseband low speed signal, sends to converting unit 22;

Described converting unit 22 exports after being converted to descending subbase band low speed signal for the descending subbase band high speed signal sent by processing unit 21, and, export after the uplink baseband low speed signal sent by processing unit 21 is converted to uplink baseband high speed signal.

Particularly, the descending subbase band high speed signal that processing unit 21 sends by converting unit 22 carries out protocol conversion, low speed agreement is converted to from high speed protocol, export after obtaining descending subbase band low speed signal, and, the uplink baseband low speed signal sent by processing unit 21 carries out protocol conversion, is high speed protocol from low speed protocol conversion, exports after obtaining uplink baseband high speed signal; Described high speed protocol comprises the interface protocol that IR/CPRI/OBSAI etc. supports optical fiber link communication, and described low speed agreement comprises the interface protocol that Ethernet host-host protocol etc. supports the link communication such as category-5 cable, CAT5E UTP cable or netting twine.

Described high speed protocol is converted to low speed agreement and namely the original signal data of high speed protocol encapsulation that uses is converted to use low speed protocol encapsulation; Described low speed protocol conversion is that namely high speed protocol is converted to the encapsulation of use high speed protocol the original signal data of low speed protocol encapsulation that uses.

Further, descending for multichannel subbase band high speed signal also for respectively for the load capacity of described RU, combines by described processing unit 21, obtains the descending subbase band high speed signal after many group superpositions, and sends to converting unit 22; Described converting unit 22 is converted to the descending subbase band low speed signal of many groups specifically for the descending subbase band high speed signal after sent by processing unit 21 many groups superpositions, and be sent to described RU, wherein, the RU belonging to same community receives same group of descending subbase band low speed signal, and any two RU belonging to different districts receive the different descending subbase band low speed signal organized.

Described multichannel descending subbase band high speed signal can be the signal of same standard, also can be the signal of multiple types; Descending subbase band high speed signal after described superposition can be described one or more descending subbase band high speed signal combination in any superposition.

Particularly, for WCDMA and GSM bimodulus, after the downgoing baseband high speed signal that AU subsystem sends decomposes by described processing unit, obtain multichannel descending subbase band high speed signal, suppose that every road descending subbase band high speed signal includes the i/q signal of 3 road WCDMA and the i/q signal of 8 road GSM, processing unit, for the load capacity of described RU, combines described multichannel descending subbase band high speed signal, obtain the descending subbase band high speed signal after many group superpositions, suppose corresponding 3 RU of EU.

(1) for division cell pattern, when namely each RU belongs to different districts:

EU is to be sent give the superposition of first RU after descending subbase band high speed signal a comprise: 1 road WCDMA i/q signal and 3 road GSM i/q signals;

EU is to be sent give the superposition of second RU after descending subbase band high speed signal b comprise: 2 road WCDMA i/q signals and 3 road GSM i/q signals;

EU is to be sent give the superposition of the 3rd RU after descending subbase band high speed signal c comprise: 2 road GSMI/Q signals.

(2) for same cell pattern, when namely each RU belongs to same community:

EU is to be sent give the superposition of first RU after descending subbase band high speed signal a comprise: 3 road WCDMA i/q signals and 8 road GSM i/q signals;

EU is to be sent give the superposition of second RU after descending subbase band high speed signal b comprise: 3 road WCDMA i/q signals and 8 road GSM i/q signals;

EU is to be sent give the superposition of the 3rd RU after descending subbase band high speed signal c comprise: 3 road WCDMA i/q signals and 8 road GSM i/q signals.

Further, descending subbase band high speed signal b after descending subbase band high speed signal a after described superposition, superposition and the descending subbase band high speed signal c after superposition encapsulates according to synchronous ethernet agreement by described converting unit respectively, obtain descending subbase band low speed signal a, descending subbase band low speed signal b and descending subbase band low speed signal c, and described descending subbase band low speed signal a is sent to first RU, descending subbase band low speed signal b is sent to second RU, descending subbase band low speed signal c is sent to the 3rd RU.

Further, described EU also comprises high-speed interface 23 and low-speed interface 24:

Described high-speed interface 23 supports high speed transport protocols, for receiving downgoing baseband high speed signal and sending it to processing unit 21, and exports the uplink baseband high speed signal after converting unit 22 conversion.

Described low-speed interface 24 supports low speed transmissions agreement, for receiving up subbase band low speed signal and sending it to processing unit 21, and exports the descending subbase band low speed signal after converting unit 22 conversion.

Preferably, described EU also comprises clock synchronization unit 25, and described clock synchronization unit 25 for extracting synchronous clock source from high-speed interface 23, and is sent to low-speed interface 24, to carry out the clock synchronous of high-speed interface 23 and low-speed interface 24.

Described EU can as one independently device exist, also can as subsystem application in the wireless communication system of the flattening network architecture described in the embodiment of the present invention one to embodiment three.

When described EU as subsystem application in the arbitrary described wireless communication system of the embodiment of the present invention one to embodiment three time, the networking model of the following stated cascade can be adopted:

Be illustrated in figure 6 the wireless communication system architecture schematic diagram of the networking mode adopting EU cascade in the embodiment of the present invention four, described wireless communication system comprises GW subsystem, AU subsystem and at least one MDAS, at least one RU that described MDAS comprises at least one EU and is connected with each EU, described EU comprises two high-speed interfaces.

Particularly, for arbitrary MDAS, each EU is connected successively by local high-speed interface, wherein, be arranged in primary EU to be connected with an EU by a local high-speed interface with the EU being arranged in last, all the other EU are connected with two EU respectively by two local high-speed interfaces, and at least one RU that each EU is also corresponding with it respectively is simultaneously connected, and are arranged in primary EU and are also connected with AU subsystem by another high-speed interface.

As shown in Figure 6, described wireless communication system comprises MDAS1, MDAS2, MDAS3 and MDAS4, and each MDAS is all connected with AU subsystem by high-speed transmission link such as optical fiber; For MDAS1, it comprises M EU, is respectively EU11, EU12 ... and EU1M, each EU is connected with N number of RU respectively, and as corresponding EU11, coupled RU is RU111, RU112 ... and RU11N, described M and N is positive integer.

Wherein, EU11 is connected with AU subsystem by the first high-speed interface, is connected with first high-speed interface of EU12 by the second high-speed interface; Second high-speed interface of EU12 with ... first high-speed interface of EU1M connects, thus forms the cascade of EU.

Particularly, in the downlink, after the GW downlink data that GW subsystem sends is converted to downgoing baseband high speed signal by AU subsystem, EU11 is input to from first high-speed interface of EU11, part downgoing baseband high speed signal is converted to after multichannel superposes descending subbase band signal through the processing unit of EU11 and converting unit, export from low-speed interface, another part downgoing baseband high speed signal directly outputs to EU12 from second high-speed interface of EU11;

In the uplink, the up subbase band low speed signal that RU121 to RU12N sends inputs from the low-speed interface of EU12, be converted to after uplink baseband high speed signal through processing unit and converting unit, be input to second high-speed interface of EU11 from the first high-speed interface and be sent to AU subsystem by first high-speed interface of EU11; Meanwhile, EU11 is sent to AU subsystem by the first high-speed interface after also the up subbase band low speed signal that connected each RU sends being converted to uplink baseband high speed signal.

For same cell pattern, the upstream data between different EU be or relation, and for division cell pattern, the upstream data between different EU be with relation.

It should be noted that, wireless communication system described in the embodiment of the present invention can also support the star-like networking of EU, the networking model such as the daisy chain of RU, star-like and mixed networking.

Embodiment five:

As shown in Figure 7, be the structural representation of AU subsystem in the embodiment of the present invention five, described AU subsystem comprises receiving element 31, converting unit 32 and transmitting element 33.

Described receiving element 31 is for receiving GW downlink data and uplink baseband high speed signal; Described converting unit 32 is converted to downgoing baseband high speed signal for the described GW downlink data received by receiving element 31, and the described uplink baseband high speed signal received by receiving element 31 is converted to GW upstream data; Described transmitting element 33 is for the downgoing baseband high speed signal that sends converting unit 32 and be converted to and GW upstream data.

Particularly, described converting unit 32 is equivalent to baseband processing unit, comprises the functions such as encoding and decoding, modulation /demodulation, de-interleaving intertexture, encrypting and decrypting, frequency hopping, timing controlled, framing solution frame; Described transmitting element 33 also has Working Status Monitoring and warning information and the function such as to report; Described receiving element 31 also has Iuh interface function, local and remote Operation and Maintenance function.

Further, described AU subsystem also comprises top level control unit 34, and described top level control unit 34 comprises the function such as RRM, mobile management, MAC, RLC.

It should be noted that, AU subsystem described in the embodiment of the present invention five can be the arbitrary AU subsystem in embodiment two and embodiment three, such as when being applied in the wireless communication system in embodiment three, described AU subsystem can be main AU subsystem, also can be arbitrary from AU subsystem.

Embodiment six:

As shown in Figure 8, be the wireless communications method schematic flow sheet of the flattening network architecture in the embodiment of the present invention six, said method comprising the steps of:

Step 101:AU subsystem is sent to EU after the GW downlink data that GW subsystem sends is converted to downgoing baseband high speed signal.

Particularly, the GW downlink data (comprising signaling plane and user face) that GW subsystem sends by AU subsystem carries out signaling process and physical layer Base-Band Processing, obtains downgoing baseband high speed signal and is sent to EU.

Described downgoing baseband high speed signal adopts the transmission of frame form, and each frame comprises the baseband signal of one or more pattern.

The downgoing baseband high speed signal that AU subsystem sends decomposes by step 102:EU, obtains multichannel descending subbase band high speed signal, and after described descending subbase band high speed signal is changed descending subbase band low speed signal, is sent to RU.

Particularly, the downgoing baseband high speed signal that EU is used for AU subsystem sends decomposes, obtain multichannel descending subbase band high speed signal, for the load capacity of described RU, descending for described multichannel subbase band high speed signal is combined, obtain the descending subbase band high speed signal after many group superpositions, route be sent to described one or more RU respectively after the descending subbase band low speed signal after the descending subbase band high speed signal after described many group superpositions is converted to many group superpositions.

The descending subbase band low speed signal frequency conversion that EU sends by step 103:RU is send to user terminal after far-end downlink radio-frequency signal.

Particularly, the superposition descending subbase band low speed signal that EU sends by RU carries out the operation of solution frame, obtain the baseband signal of corresponding one or more patterns, and corresponding frequency up-conversion operation is performed respectively to the baseband signal of different mode, changed into the far-end downlink radio-frequency signal of one or more pattern and sent to user terminal.

The above is the downlink transmission process of the embodiment of the present invention six, and its uplink process is its inverse process, specifically can comprise:

The far-end upstream radio-frequency signal frequency conversion that user terminal sends by RU is be sent to EU after up subbase band low speed signal, by EU described up subbase band low speed signal converged and be sent to AU subsystem after being converted to uplink baseband high speed signal, after described uplink baseband high speed signal being converted to GW upstream data by AU subsystem, be transferred to core net by GW subsystem.

It should be noted that, described in the embodiment of the present invention six, wireless communications method can support multiple wireless communication mode, comprises GSM, WCDMA, TD-SCDMA, LTE and WLAN etc.

Embodiment seven:

The embodiment of the present invention seven is described in detail to wireless communications method described in embodiment six by concrete example, for WCDMA and GSM bimodulus, suppose that GW subsystem comprises 8 GSM carrier waves and 3 WCDMA carrier waves to the GW downlink data that AU subsystem sends, then described wireless communications method comprises the following steps:

Step one: AU subsystem is sent to EU after the GW downlink data that GW subsystem sends is converted to downgoing baseband high speed signal.

Particularly, AU subsystem carries out Base-Band Processing respectively to the GW mixing downlink data (i.e. described GW downlink data) comprising 8 GSM carrier waves and 3 WCDMA carrier waves received, obtain the i/q signal of GSM and the i/q signal of WCDMA, and framing operation is carried out to the i/q signal of described GSM and the i/q signal of WCDMA, obtain downgoing baseband high speed signal.

Described downgoing baseband high speed signal adopts the multi-frame form transmission with multiple subframe, and the content that subframe transmits is made up of 3 parts, comprises overhead byte, GSM standard i/q signal and WCDMA standard i/q signal, idle bytes; As shown in Figure 9, for downgoing baseband high speed transmission of signals data data structure schematic diagram in a single sub-frame, comprise overhead byte, 8 road i/q signals of GSM standard, the 3 road i/q signals of WCDMA, and idle bytes, it should be noted that, the data structure of data structure shown in Fig. 8 for adopting for the specific transmission means of the present embodiment seven, when the embodiment of the present invention seven adopts other transmission meanss, can do accommodation to described data structure.

Described downgoing baseband high speed transmission of signals data one frame connects a frame transmission, multiple subframe forms a multi-frame, multi-frame is again according to common public radio interface (The Common Public Radio Interface, CPRI) protocol encapsulation, as shown in Figure 10, be the CPRI package mode of 614.4Mbit/s wire rate; It should be noted that, CPRI agreement is adopted to encapsulate downgoing baseband high speed transmission of signals data in the embodiment of the present invention seven, but the embodiment of the present invention seven is not limited to adopt other agreements to encapsulate described downgoing baseband high speed transmission of signals data, such as, adopt the interface protocol comprising the support optical fiber link communications such as IR/OBSAI to encapsulate data, data rate can be the rate requirement of other applicable systems application.

The downgoing baseband high speed signal that AU subsystem sends decomposes by step 2: EU, obtains multichannel descending subbase band high speed signal, and after described descending subbase band high speed signal is changed descending subbase band low speed signal, is sent to RU.

Particularly, the downgoing baseband high speed signal that AU subsystem sends is carried out the process of solution frame according to CPRI agreement by the processing unit of EU, obtains the i/q signal of multichannel WCDMA and GSM, i.e. descending subbase band high speed signal; Because each subframe formed in step one comprises the i/q signal of 3 road WCDMA and the i/q signal of 8 road GSM, therefore, in this step 2, by the i/q signal of the i/q signal of the WCDMA on 3 tunnels and the GSM on 8 tunnels can be obtained after the process of solution frame.

Further, the processing unit of EU, for the load capacity of described RU, combines described multichannel descending subbase band high speed signal, obtains the descending subbase band high speed signal after many group superpositions, supposes corresponding 3 RU of EU, is respectively RU1, RU2 and RU3.

(1) for division cell pattern:

Descending subbase band high speed signal a after EU superposition of giving RU1 to be sent comprises: 1 road WCDMAI/Q signal and 3 road GSM i/q signals;

Descending subbase band high speed signal b after EU superposition of giving RU2 to be sent comprises: 2 road WCDMAI/Q signals and 3 road GSM i/q signals;

Descending subbase band high speed signal c after EU superposition of giving RU3 to be sent comprises: 2 road GSM i/q signals.

(2) for same cell pattern:

Descending subbase band high speed signal a after EU superposition of giving RU1 to be sent comprises: 3 road WCDMAI/Q signals and 8 road GSM i/q signals;

Descending subbase band high speed signal b after EU superposition of giving RU2 to be sent comprises: 3 road WCDMAI/Q signals and 8 road GSM i/q signals;

Descending subbase band high speed signal c after EU superposition of giving RU3 to be sent comprises: 3 road WCDMAI/Q signals and 8 road GSM i/q signals.

It should be noted that, the stacked system of above-mentioned descending subbase band high speed signal is only illustrating of the embodiment of the present invention seven, in actual applications, can adjust according to cell conditions.

Further, descending subbase band high speed signal b after descending subbase band high speed signal a after described superposition, superposition and the descending subbase band high speed signal c after superposition encapsulates according to synchronous ethernet agreement by the converting unit of EU respectively, obtain descending subbase band low speed signal a, descending subbase band low speed signal b and descending subbase band low speed signal c, and described descending subbase band low speed signal a is sent to RU1, descending subbase band low speed signal b is sent to RU2, descending subbase band low speed signal c is sent to RU3.

It should be noted that, be not limited in the embodiment of the present invention seven adopt other agreements to encapsulate described superposition descending subbase band low speed signal, as can also adopt support category-5 cable, CAT5E UTP cable or netting twine interface protocol to as described in superposition descending subbase band low speed signal encapsulate.

The descending subbase band low speed signal frequency conversion that EU sends by step 3: RU is send to user terminal after far-end downlink radio-frequency signal.

(1) for division cell pattern:

The descending subbase band low speed signal a that EU sends by RU1 carries out the process of solution frame according to synchronous ethernet agreement, frequency up-conversion operation is carried out after obtaining 1 road WCDMA i/q signal and 3 road GSM i/q signals, obtain WCDMA radiofrequency signal and GSM radiofrequency signal, and send it to user terminal;

The descending subbase band low speed signal b that EU sends by RU2 carries out the process of solution frame according to synchronous ethernet agreement, after obtaining 2 road WCDMA i/q signals and 3 road GSM i/q signals, frequency up-conversion operation is carried out to it, obtain WCDMA radiofrequency signal and GSM radiofrequency signal, and send it to user terminal;

The descending subbase band low speed signal c that EU sends by RU3 carries out the process of solution frame according to synchronous ethernet agreement, carries out frequency up-conversion operation, obtain GSM radiofrequency signal, and send it to user terminal after obtaining 2 road GSM i/q signals.

(2) for same cell pattern:

Descending subbase band low speed signal a, b and c that EU sends are carried out the process of solution frame according to synchronous ethernet agreement by RU1, RU2 and RU3 respectively, after obtaining 3 road WCDMA i/q signals and 8 road GSM i/q signals, frequency up-conversion operation is carried out to it, obtain WCDMA radiofrequency signal and GSM radiofrequency signal, and send it to user terminal.

The above is the downlink transmission process of the embodiment of the present invention seven, and its uplink process is its inverse process, specifically can comprise the steps:

The first step: RU receives the far-end upstream radio-frequency signal that user terminal sends, this far-end upstream radio-frequency signal is down-converted to the baseband signal of one or more pattern, after carrying out framing according to data structure shown in Fig. 9 to described baseband signal, synchronous ethernet agreement is adopted to be encapsulated as up subbase band low speed signal and to be sent to EU.

Particularly, when the embodiment of the present invention adopts other transmission meanss, accommodation can be done to data structure shown in Fig. 9; In addition, be not limited in this step adopt other agreements to encapsulate the up subbase band low speed signal after described framing, support that the interface protocol of category-5 cable, CAT5E UTP cable or netting twine encapsulates it as adopted.

Up subbase band low speed signal a ', b ' and c ' that RU1, RU2 and RU3 send by the processing unit of second step: EU carry out the process of solution frame according to synchronous ethernet agreement, obtain WCDMA i/q signal and GSM i/q signal, and reconfigured as subframe according to data structure shown in Fig. 9, multiple subframes combine is multi-frame, converting unit is sent to after being formed by the uplink baseband low speed signal of multi-frame form, converting unit obtains uplink baseband high speed signal after encapsulating according to CPRI agreement described uplink baseband low speed signal, and sends it to AU subsystem.

(1) for division cell pattern:

The 2 road GSM i/q signals of the 2 road WCDMA i/q signals of the 1 road WCDMA i/q signal of up subbase band low speed signal a ' and 2 road GSM i/q signals, up subbase band low speed signal b ' and 3 road GSM i/q signals, up subbase band low speed signal c ', form the uplink baseband low speed signal of 3 road WCDMA i/q signals and 8 road GSM i/q signals.

(2) for same cell pattern:

The 3 road WCDMA i/q signals of the 3 road WCDMA i/q signals of the 3 road WCDMA i/q signals of up subbase band low speed signal a ' and 8 road GSM i/q signals, up subbase band low speed signal b ' and 8 road GSM i/q signals, up subbase band low speed signal c ' and 8 road GSM i/q signals, form the uplink baseband low speed signal of 3 road WCDMA i/q signals and 8 road GSM i/q signals; For same cell pattern, between up subbase band low speed signal and uplink baseband low speed signal be or relation, i.e. the I signal of the I signal=uplink baseband low speed signal of the I signal+up subbase band low speed signal c ' of the I signal+up subbase band low speed signal b ' of up subbase band low speed signal a '; The Q signal of the Q signal=uplink baseband low speed signal of the Q signal+up subbase band low speed signal c ' of the Q signal+up subbase band low speed signal b ' of up subbase band low speed signal a ', symbol "+" represents the relation of "or".

Converting unit obtains uplink baseband high speed signal after encapsulating according to CPRI agreement described uplink baseband low speed signal, and sends it to AU subsystem.

3rd step: AU subsystem carries out the process of solution frame according to the uplink baseband high speed signal of CPRI agreement to the employing multi-frame form transmission that EU sends, and obtains the i/q signal of WCDMA and GSM, and is converted into the GW upstream data of WCDMA and GSM respectively.

CPRI agreement is adopted to carry out framing operation to downgoing baseband high speed transmission of signals data in downlink transmission process due to the present embodiment seven, therefore CPRI agreement is adopted to carry out solution frame to uplink baseband high speed signal in this step, in fact, the interface protocol comprising the support optical fiber link communications such as IR/OBSAI can also be adopted to carry out framing to data and separate frame process.

Embodiments provide a kind of wireless communication system of the flattening network architecture, method and expanding unit, the wireless communication system of the described flattening network architecture comprises GW subsystem, AU subsystem, EU and at least one RU be connected with EU, by the function of radio network controller (RNC) is moved down into GW subsystem and AU subsystem, the structure of whole communication system is made to decompose further and simplify, reduce network processes time delay and propagation delay time, improve Consumer's Experience, simultaneously, signalling node reduces, thus effectively improve service access efficiency and switching efficiency, simultaneously, RU is sent to after utilizing described EU that the downgoing baseband high speed signal that AU subsystem sends is converted to descending subbase band low speed signal, make between EU and RU, to adopt the low speed transmissions links such as category-5 cable to connect, be different from the mode of the Optical Fiber Transmission adopted between traditional BBU and RRU, be convenient to in-door covering, reduce the difficulty of network design, described wireless communication system supports multiple passback mode simultaneously, comprise xDSL (all kinds Digital Subscribe Line digital subscriber line, comprise ADSL, VDSL, RADSL etc.), GPON, EPON, Cable etc., build easy to maintenance, expense is lower, and described wireless shrouding system can support the cascade of AU subsystem and the folded pattern of group, improves the extendible capacity of system, reduces the cost of System Expansion.

The above is only the preferred embodiments of the invention, and obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.

Claims

1. a wireless communication system for the flattening network architecture, is characterized in that, at least one radio frequency extension apparatus RU comprising access AU subsystem, expanding unit EU and be connected with EU, wherein:

Described AU subsystem, is converted to downgoing baseband high speed signal for the GW downlink data sent by gateway GW subsystem and is sent to EU, and, the uplink baseband high speed signal that EU sends is converted to GW upstream data and is transferred to core net by GW subsystem;

Described RU, descending subbase band low speed signal frequency conversion for being sent by EU is far-end downlink radio-frequency signal, and sends to user terminal, and, receive the far-end upstream radio-frequency signal that user terminal sends, and be sent to EU after up subbase band low speed signal by this far-end upstream radio-frequency signal frequency conversion;

Particularly, described wireless communication system comprises multiple AU subsystem:

When each AU subsystem that described wireless communication system comprises is connected successively by local subtending port, for arbitrary AU subsystem, described arbitrary AU subsystem is specifically for when the disconnecting of its next adjacent AU subsystem and GW subsystem, receive the GW downlink data that GW subsystem sends to next adjacent AU subsystem, and be sent to next adjacent AU subsystem by local subtending port, and, receive next adjacent AU subsystem GW upstream data to be sent by the subtending port of this locality, and be sent to GW subsystem;

When in multiple AU subsystems that described wireless communication system comprises, one of them AU subsystem is main AU subsystem, when all the other AU subsystems are from AU subsystem, described main AU subsystem is connected with EU with GW subsystem respectively, be connected successively from AU subsystem by local stacking interface, wherein first is connected with main AU subsystem from AU subsystem by stacking interface; Further,

2. wireless communication system as claimed in claim 1, it is characterized in that, described EU comprises:

Processing unit, decomposes for the downgoing baseband high speed signal sent by AU subsystem, obtains multichannel descending subbase band high speed signal, and send to converting unit, and the up subbase band low speed signal sent by RU converges as after uplink baseband low speed signal, sends to converting unit;

Converting unit, descending subbase band high speed signal for being sent by processing unit is converted to descending subbase band low speed signal, and is sent to described RU, and, after the uplink baseband low speed signal that processing unit sends is converted to uplink baseband high speed signal, be sent to AU subsystem.

3. wireless communication system as claimed in claim 2, is characterized in that,

Described processing unit, also for respectively for the load capacity of described RU, combines descending for multichannel subbase band high speed signal, obtains the descending subbase band high speed signal after many group superpositions, and sends to converting unit;

Described converting unit, the descending subbase band low speed signal of many groups is converted to specifically for the descending subbase band high speed signal after sent by processing unit many groups superpositions, and be sent to described RU, wherein, the RU belonging to same community receives same group of descending subbase band low speed signal, and any two RU belonging to different districts receive the different descending subbase band low speed signal organized.

4. wireless communication system as claimed in claim 1, is characterized in that,

Described AU subsystem is connected by high-speed transmission link with EU;

Described EU and RU is connected by low speed transmissions link.

5. access an AU subsystem, it is characterized in that, described AU subsystem is the arbitrary AU subsystem in wireless communication system according to claim 1, and described AU subsystem comprises:

Receiving element, for receiving gateway GW downlink data and uplink baseband high speed signal;

6. based on a wireless communications method for the flattening network architecture of wireless communication system according to claim 1, it is characterized in that, described method comprises:

Expanding unit EU is sent to after the GW downlink data that gateway GW subsystem sends is converted to downgoing baseband high speed signal by access AU subsystem;

Described downgoing baseband high speed signal decomposes by EU, obtains multichannel descending subbase band high speed signal, and after described descending subbase band high speed signal is converted to descending subbase band low speed signal, is sent to radio frequency extension apparatus RU;

RU sends to user terminal after far-end downlink radio-frequency signal.

7. based on a wireless communications method for the flattening network architecture of wireless communication system according to claim 1, it is characterized in that, described method comprises:

The far-end upstream radio-frequency signal frequency conversion that user terminal sends by radio frequency extension apparatus RU is be sent to expanding unit EU after up subbase band low speed signal;

Described up subbase band low speed signal converges and is sent to access AU subsystem after being converted to uplink baseband high speed signal by EU;

AU subsystem is transferred to core net by GW subsystem after described uplink baseband high speed signal is converted to gateway GW upstream data.