CN102547716A

CN102547716A - Wireless communication system and method for flat network architecture and extend unit

Info

Publication number: CN102547716A
Application number: CN2012100050891A
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: 2012-07-04
Anticipated expiration: 2032-01-06
Also published as: CN102547716B

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, relate in particular to a kind of wireless communication system, method and expanding unit of the flattening network architecture.

Background technology

At present at wireless communication technology field, like second generation mobile communication technology (2 ^NdGeneration is 2G) with 3G (Third Generation) Moblie technology (3 ^RdGeneration, 3G) field generally adopts the mode of macro base station to dispose wireless communication system; The auxiliary covering that realizes wireless signal with indoor distributed antenna system and repeater; As (Global System for Mobile Communications GSM), generally adopts base station controller (Base Station Controller for global system for mobile communications; BSC) and base transceiver station (Base Transceiver Station, wireless coverage mode BTS); And in the 3G field, then generally adopt baseband processing unit (Base Band Unit, BBU) and Remote Radio Unit (Radio Remote Unit, wireless coverage mode RRU).

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

The BBU of said system mainly is used for accomplishing the Base-Band Processing function (like coding, multiplexing, modulation and spread spectrum etc.) of Uu interface (Interface between the NodeB and the UE), Iub interface (Interface between the RNC and the BBU) function, signaling process, this locality and the remote operation maintaining function of RNC, and the Working Status Monitoring of NodeB system and alarming information report function.

The RRU of said system is integrated digital intermediate frequency module, Transceiver Module, power amplifier and filtration module; Wherein the digital intermediate frequency module is used for down-conversion, A/D, D/A conversion etc. in the modulation, numeral of optical transmission; Transceiver Module is used to accomplish the conversion of intermediate-freuqncy signal to radiofrequency signal; Power amplifier and filtration module then are used for launching through antenna opening after radiofrequency signal process power amplifier and the filtering.

In the wireless communication system as shown in Figure 1; Said RNC is interconnected through Iu interface (Interface between the Core Network and the RNC) realization and core net; Realize interconnected with BBU through Iub interface, and realize management and control BBU through Iub interface; Said BBU is interconnected through realization of high-speed transfer links such as optical fiber and RRU's, like communication protocol IR (Interface between the RRU and the BBU)/CPRI (Common Public Radio Interface)/OBASI interface protocols such as (Open Base Station Architecture Initiative) that can adopt standard; Said RRU is interconnected through realization of Uu interface and user terminal.

In above-mentioned wireless communication system, because it is link-attached to be based on high-speed transfer such as optical fiber between BBU and the RRU, therefore, RRU could be installed in the place that needs fiber deployment, and the network system deployment is difficult, and cost is higher.

In addition; Because GSM uses the most extensive, the best communication network of benefit at present; In a very long time with long-term existence; And along with the continuous increase of GSM number of network users and professional continuous expansion, existing GSM network needs dilatation constantly and optimization, with the needs that satisfy business development and the ever-increasing GSM network user's demand.But; The GSM network capacity extension is faced with base station selection difficulty, indoor signal and covers many predicaments such as inserting complicacy, and along with the fast development of mobile communication, the progressively evolution of the network architecture of GSM; Develop into Long Term Evolution (the Long Term Evolution of all-IPization gradually from the complicated open network architedure of GSM; LTE) the flattening network architecture, therefore, on the basis of existing technology; A kind of new wireless communication system that meets the development trend of future mobile communications need be provided, solve the problems that exist in above-mentioned 2G, the 3G communication system.

Summary of the invention

The embodiment of the invention provides a kind of wireless communication system, method and expanding unit of the flattening network architecture, disposes the problem of difficulty in order to solve the network system that exists in the prior art.

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

Said AU subsystem; Be used for gateway (Gateway; GW) the GW downlink data of subsystem transmission converts the downgoing baseband high speed signal into and sends to EU, and the uplink baseband high speed signal that EU is sent converts the GW upstream data into and is transferred to core net through the GW subsystem;

Said EU; Be used for the downgoing baseband high speed signal that the AU subsystem sends is decomposed; Obtain the descending subbase band of multichannel high speed signal, and after converting said descending subbase band high speed signal into descending subbase band low speed signal, send to said RU; And, after converging and convert into the uplink baseband high speed signal, the up subbase band low speed signal that RU is sent sends to the AU subsystem;

Said RU; The descending subbase band low speed signal frequency conversion that is used for EU is sent is the far-end downlink radio-frequency signal, and sends to user terminal, and; Receive the up radiofrequency signal of far-end that user terminal sends, and be to send to EU behind the up subbase band low speed signal the up radiofrequency signal frequency conversion of this far-end.

A kind of EU comprises processing unit and converting unit:

Said processing unit is used for the downgoing baseband high speed signal that receives is decomposed, and obtains the descending subbase band of multichannel high speed signal; And send to converting unit; And, the up subbase band low speed signal that receives is converged to behind the uplink baseband low speed signal, send to converting unit;

Said converting unit is exported after being used for converting the descending subbase band high speed signal that processing unit sends into descending subbase band low speed signal, and, after converting the uplink baseband high speed signal into, exports the uplink baseband low speed signal that processing unit is sent.

A kind of AU subsystem comprises:

Receiving element is used to receive GW downlink data and uplink baseband high speed signal;

Converting unit is used for converting the said GW downlink data that receiving element receives into the downgoing baseband high speed signal, and converts the said uplink baseband high speed signal that receiving element receives into the GW upstream data;

Transmitting element is used to send downgoing baseband high speed signal and the GW upstream data that converting unit is converted to.

A kind of wireless communications method of the flattening network architecture, said method comprises:

After converting the downgoing baseband high speed signal into, the GW downlink data that the AU subsystem sends the GW subsystem sends to EU;

EU decomposes said downgoing baseband high speed signal, obtains the descending subbase band of multichannel high speed signal, and after converting said descending subbase band high speed signal into descending subbase band low speed signal, sends to RU;

RU is to send to user terminal behind the far-end downlink radio-frequency signal with the frequency conversion of said descending subbase band low speed signal.

The up radiofrequency signal frequency conversion of far-end that RU sends user terminal is to send to EU behind the up subbase band low speed signal;

EU sends to the AU subsystem after said up subbase band low speed signal is converged and convert into the uplink baseband high speed signal;

The AU subsystem is transferred to core net through the GW subsystem after converting said uplink baseband high speed signal into the GW upstream data.

Beneficial effect of the present invention is:

The embodiment of the invention provides a kind of wireless communication system, method and expanding unit of the flattening network architecture; Said wireless communication system comprises AU subsystem, EU and at least one RU that is connected with EU; Through utilizing EU that the downgoing baseband high speed signal that the AU subsystem sends is converted into descending subbase band low speed signal and sends to RU; Make low speed transmissions links such as to adopt category-5 cable between EU and the RU connect, be convenient to indoor covering, reduced the difficulty and the cost of network design.

Description of drawings

Structural representation for existing 3G wireless communication system shown in Figure 1;

Shown in Figure 2 is the wireless communication system architecture sketch map of the flattening network architecture in the embodiment of the invention one;

Shown in Figure 3 is the wireless communication system architecture sketch map that adopts the networking mode of AU subsystem cascade in the embodiment of the invention two;

Shown in Figure 4 is the wireless communication system architecture sketch map of the networking mode that employing AU subsystem piles up in the embodiment of the invention three;

Shown in Figure 5 is the structural representation of expanding unit in the embodiment of the invention four;

Shown in Figure 6 is the wireless communication system architecture sketch map that adopts the networking mode of EU cascade;

Shown in Figure 7 is the structural representation of AU subsystem in the embodiment of the invention five;

Shown in Figure 8 is the wireless communications method schematic flow sheet of the flattening network architecture in the embodiment of the invention six;

Shown in Figure 9 for transmitting the data structure sketch map of data in single subframe;

Shown in Figure 10 is CPRI package mode data structure sketch map.

Embodiment

The embodiment of the invention provides a kind of wireless communication system, method and expanding unit of the flattening network architecture; Existing wireless network communications system structure is further decomposed and simplification; The function of RNC is moved down into GW subsystem and AU subsystem, and increased EU, send to RU after the downgoing baseband high speed signal that utilizes said EU that the AU subsystem is sent converts descending subbase band low speed signal into; Make low speed transmissions links such as to adopt category-5 cable between EU and the RU connect; Need not based on return networks such as jumbo optical fiber, be convenient to indoor covering, reduced the difficulty and the cost of network design; Further, can support the cascade of AU subsystem and group to fold pattern, improve the extendible capacity property of system through the scheme of the embodiment of the invention.

Below in conjunction with Figure of description the embodiment of the invention is described further, but the present invention is not limited to following embodiment.

Embodiment one:

As shown in Figure 2; Wireless communication system architecture sketch map for the flattening network architecture in the embodiment of the invention one; Said wireless communication system comprises: AU subsystem 11, EU12 and at least one RU13 that is connected with EU12, said wireless communication system can also comprise GW subsystem 14.

Said wireless communication system can be supported multiple wireless transmission standard; Comprise global system for mobile communications (Global System of Mobile communication; GSM), WCDMA (Wideband Code Division Multiple Access; WCDMA), TD SDMA (Time Division-Synchronous Code Division Multiple Access; TD-SCDMA), Long Term Evolution (Long Term Evolution, LTE), WLAN (Wireless Local Area Networks, WLAN) etc.; The signal processing of arbitrary standard more than said wireless communication system can be supported, the mixed processing of the multiple signal of multiple standard more than also can supporting simultaneously, also promptly, said wireless communication system can be supported single mode or multimode Signal Processing; Particularly; The signal processing of arbitrary standard more than the GW subsystem 14 of said wireless communication system, AU subsystem 11, EU12 and RU13 can support; The signal processing of multiple standard more than also can supporting simultaneously, promptly said GW subsystem 14, AU subsystem 11, EU12 and RU13 are for supporting the radio communication subsystem of single mode or multimode.

Said AU subsystem 11 is used for the GW downlink data (comprising signaling plane and user plane) that GW subsystem 14 sends is converted into the downgoing baseband high speed signal and sends to EU12; And the uplink baseband high speed signal that EU12 is sent converts the GW upstream data into and is transferred to core net through GW subsystem 14.

Particularly, said AU subsystem 11 comprises BBU and upper strata control unit, the function that has been equivalent to part RNC and NodeB integrated, the perhaps function of part BSC and BTS; Wherein said BBU comprises that encoding and decoding, modulation, de-interleaving interweave, encrypting and decrypting, frequency hopping, timing controlled, framing are separated functions such as frame; Be mainly used in the GW downlink data that receives is carried out Base-Band Processing; Obtain the downgoing baseband high speed signal, and convert the uplink baseband high speed signal that receives into the GW upstream data; Said upper strata control unit comprise RRM, mobile management, medium access control (Media Access Control, MAC), Radio Link control (Radio Link Control, function such as RLC); Simultaneously, said AU subsystem 11 also has the function such as Working Status Monitoring and alarming information report of Iuh interface function, this locality and remote operation maintaining function and AU subsystem 11.

Said EU12 is used for the downgoing baseband high speed signal that AU subsystem 11 sends is decomposed; Obtain the descending subbase band of multichannel high speed signal; And after converting said descending subbase band high speed signal into descending subbase band low speed signal; Send to said RU13, and send to AU subsystem 11 after the up subbase band low speed signal that RU13 sends converged and convert into the uplink baseband high speed signal.

Particularly, said EU12 comprises processing unit and converting unit:

Said processing unit is used for the downgoing baseband high speed signal that AU subsystem 11 sends is decomposed; Obtain the descending subbase band of multichannel high speed signal, and send to converting unit, and; The up subbase band low speed signal that RU13 is sent converges to behind the uplink baseband low speed signal, sends to converting unit; Said converting unit is used for converting the descending subbase band high speed signal that processing unit sends into descending subbase band low speed signal; And send to said RU13; And, after the uplink baseband low speed signal that processing unit is sent converts the uplink baseband high speed signal into, send to AU subsystem 11.

Further, said processing unit also is used for being directed against respectively the load capacity of said RU13, and the descending subbase band of multichannel high speed signal is made up, and obtains the descending subbase band high speed signals after many groups superpose, and sends to converting unit; Descending subbase band high speed signal after the many groups of stacks that said converting unit specifically is used for processing unit is sent converts the descending subbase band low speed signal of many groups into; And send to said RU13; Wherein, The RU13 that belongs to same sub-district receives same group of descending subbase band low speed signal, and any two RU13 that belong to different districts receive not descending subbase band low speed signal on the same group; The descending subbase band of said multichannel high speed signal can be the signal of same standard, also can be the signal of multiple standard; Descending subbase band high speed signal after the said stack can be said one or more the combination in any stack of descending subbase band high speed signal.

Particularly; With WCDMA and GSM bimodulus is example; After the downgoing baseband high speed signal that said processing unit sends AU subsystem 11 decomposes, obtain the descending subbase band of multichannel 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 to the load capacity of said RU13; The descending subbase band of said multichannel high speed signal is made up, obtain the descending subbase band high speed signal after many groups superpose, suppose corresponding 3 RU13 of EU12.

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

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

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

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

(2) for same cell pattern, when promptly each RU13 belongs to same sub-district:

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

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

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

Need to prove that the stacked system of above-mentioned descending subbase band high speed signal is merely illustrating of the embodiment of the invention, in practical application, can adjust according to cell conditions.

Further; Descending subbase band high speed signal a, descending subbase band high speed signal b stack after and descending subbase band high speed signal c stack after of said converting unit after with said stack encapsulates respectively according to the synchronous ethernet agreement; Obtain descending subbase band low speed signal a, descending subbase band low speed signal b and descending subbase band low speed signal c; And send to first RU13 to said descending subbase band low speed signal a; Send to second RU13 to descending subbase band low speed signal b, send to the 3rd RU13 to descending subbase band low speed signal c.

Need to prove; Descending subbase band low speed signal after being not limited in the embodiment of the invention adopt other agreements to said stack encapsulates, and encapsulates as adopting the descending subbase band low speed signal of interface protocol after to said stack of supporting category-5 cable, CAT5E UTP cable or netting twine.

The descending subbase band low speed signal frequency conversion that said RU13 is used for EU12 is sent is the far-end downlink radio-frequency signal; And send to user terminal; And; Receive the up radiofrequency signal of far-end that user terminal sends, and be to send to EU12 behind the up subbase band low speed signal the up radiofrequency signal frequency conversion of this far-end.

Said EU12 and connected at least one RU13 can be called covering subsystem or multimode distributing antenna system (Multi-mode Distribution Antanna System, MDAS) subsystem; Said covering subsystem is used for the downgoing baseband high speed signal that AU subsystem 11 sends is decomposed, recombinates and up-converts to the far-end downlink radio-frequency signal at least one road, realizes the signal of overlay area is covered; And the up radiofrequency signal down-conversion of far-end at least one road that the user terminal of overlay area is sent, and converge again and send to AU subsystem 11 after being combined as the uplink baseband high speed signal.

Particularly; Descending subbase band low speed signal after the said stack and up subbase band low speed signal are for adapting to the signal of low speed transmissions links such as category-5 cable, CAT5E UTP cable or netting twine, and said downgoing baseband high speed signal and uplink baseband high speed signal are for adapting to the signal of high-speed transfer links such as optical fiber or data/address bus.

Said AU subsystem 11 can be connected through high-speed transfer links such as optical fiber or data/address buss with EU12; When AU subsystem 11 and EU12 are two different equipment; Adopt high-speed transfer link connections such as optical fiber between the two, accepted standard communication protocol can be interface protocols such as IR/CPRI/OBSAI; When AU subsystem 11 is same equipment with EU12, can connect through data/address bus between the two.

Because EU12 has realized downgoing baseband high speed signal and descending subbase band low speed signal; And the transformation between up subbase band low speed signal and the uplink baseband high speed signal; Therefore when between AU subsystem 11 and EU12, adopting optical fiber or data/address bus to be connected transmit high-speed signals, can adopt low speed transmissions links such as category-5 cable, CAT5E UTP cable or netting twine to be connected between EU12 and the RU13, be different from the connected mode of the high-speed transfer links such as optical fiber that adopt between traditional BBU and the RRU; Can be good at the residence network resource of relying on existing deployment complete; Need not lay optical fiber cable, register one's residence simply, be convenient to indoor covering, can low-cost networking fast.

Said RU13 is connected with user terminal through standard interface (like the Uu interface of 3G or the Um Interface of GSM).

Said GW subsystem 14 is between AU subsystem 11 and the core net; Through gateway interface (like the Iuh interface; Interface between the Gateway and the AU) links to each other with AU subsystem 11, be used to realize converging and transmitting of signaling and data between AU subsystem 11 and the core net; GW subsystem 14 is accomplished the converging back of signalings and data and is inserted core net through standard communication, as pass through the packet domain that standard communication (like the Iu-PS of 3GPP) inserts CN, the circuit domain of passing through standard communication (like the Iu-CS of 3GPP) access CN.

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

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

Said nms subsystem 15 links to each other with RU13 with GW subsystem 14, AU subsystem 11, EU12 through network management interface (like the network management interface based on the TR-069 agreement), realizes management and control and treatment to GW subsystem 14, AU subsystem 11, EU12 and RU13; Said nms subsystem 15 can also be realized user interface management, user management, the user of GW subsystem 14, AU subsystem 11, EU12 and RU13 are organized functions such as management, software administration, log management, system maintenance, parameter setting, alarm report.

Embodiment two:

In the said wireless communication system of the embodiment of the invention; Said AU subsystem can adopt the mode networking of cascade; As shown in Figure 3; Be the wireless communication system architecture sketch map of the networking mode that adopts the cascade of AU subsystem, said wireless communication system comprises GW subsystem, a plurality of EU, at least one RU that links to each other with each EU and a plurality of AU subsystem, and each AU subsystem also comprises subtending port.

Particularly; Each AU subsystem links to each other through local subtending port successively, wherein, is arranged in primary AU subsystem and links to each other with an AU subsystem through local subtending port with the AU subsystem that is arranged in last; All the other AU subsystems link to each other with two AU subsystems respectively through local subtending port; The EU that each AU subsystem is also corresponding with it respectively simultaneously links to each other, and generally speaking, each AU subsystem all links to each other with the GW subsystem.

As shown in Figure 3, comprise three AU subsystems in the said wireless communication system, be respectively AU subsystem 1, AU subsystem 2 and AU subsystem 3; Said AU subsystem 1 links to each other with AU subsystem 2 through local subtending port; Said AU subsystem 2 links to each other with AU subsystem 1, AU subsystem 3 respectively through local subtending port simultaneously; Said AU subsystem 3 links to each other with AU subsystem 2 through local subtending port; Simultaneously, AU subsystem 1, AU subsystem 2 and AU subsystem 3 all link to each other with the GW subsystem through gateway interface, and AU subsystem 1, AU subsystem 2 and AU subsystem 3 link to each other with corresponding EU1, EU2 and EU3 through high-speed transfer links such as optical fiber respectively.

To arbitrary AU subsystem; Specifically be used for when its next adjacent AU subsystem interrupted with being connected of GW subsystem; Receive the GW subsystem and send to the GW downlink data of next adjacent AU subsystem, and send it to next adjacent AU subsystem, and; Through receiving next adjacent AU subsystem GW upstream data to be sent, and send it to the GW subsystem.

If the AU subsystem interrupts to the connection of GW subsystem; As shown in Figure 3; When the link of AU subsystem 2 to GW subsystems breaks down (link that is represented by dotted lines AU subsystem 2 and GW subsystem breaks down), through the scheme of the embodiment of the invention two, AU subsystem 1 can be transmitted the GW downlink data of AU subsystem 2 to the GW upstream data of GW subsystem and GW subsystem to AU subsystem 2; Thereby guaranteed the unobstructed of link, idiographic flow is described below:

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

In the scheme of the embodiment of the invention two, can connect through optical fiber between each AU subsystem.

Embodiment three:

In the said wireless communication system of the embodiment of the invention; Said AU subsystem can also adopt the mode networking of piling up, and is as shown in Figure 4, for adopting the wireless communication system architecture sketch map of the networking mode that the AU subsystem piles up; Said wireless communication system comprises GW subsystem, EU, at least one RU that links to each other with EU and a plurality of AU subsystem; One of them AU subsystem is main AU subsystem, and all the other AU subsystems are from the AU subsystem, and each AU subsystem also comprises and piles up interface.

Said main AU subsystem links to each other with EU with the GW subsystem respectively, links to each other successively from the interface that piles up of AU subsystem through this locality, and wherein first is connected with main AU subsystem through piling up interface from the AU subsystem.

As shown in Figure 4, comprise three AU subsystems in the said wireless communication system, be respectively AU subsystem 1, AU subsystem 2 and AU subsystem 3, said AU subsystem 1 links to each other with the GW subsystem through gateway interface, links to each other with EU through high-speed transfer links such as optical fiber; Said AU subsystem 2 links to each other respectively with AU subsystem 3 with AU subsystem 1 through piling up interface; Said AU subsystem 3 links to each other with AU subsystem 2 through piling up interface.

Said main AU subsystem; Be used to receive the GW downlink data that the GW subsystem sends, and, the carrier signal that exceeds said number of carriers that comprises in the said GW downlink data be sent to the subsystem from AU through piling up interface according to the number of carriers that this locality can be handled; And will not send to from the GW downlink data of AU subsystem and convert the downgoing baseband high speed signal into; Downgoing baseband high speed signal after the conversion that reception is returned from the AU subsystem sends to EU with the downgoing baseband high speed signal, and; Receive the uplink baseband high speed signal that EU sends; And, the carrier signal that exceeds said number of carriers that comprises in the said uplink baseband high speed signal will be sent to the subsystem from AU through piling up interface, and will send to from the uplink baseband high speed signal of AU subsystem and convert the GW upstream data into according to the number of carriers that this locality can be handled; GW upstream data after the conversion that reception is returned from the AU subsystem sends to the GW subsystem with the GW upstream data;

Said from the AU subsystem; Be used to receive main AU subsystem or last one GW downlink data from the transmission of AU subsystem; And the number of carriers that can handle according to this locality; The carrier signal that exceeds the number of carriers that can handle this locality that comprises in the said GW downlink data is sent to adjacent next from the AU subsystem through piling up interface, and will send to next GW downlink data and convert the downgoing baseband high speed signal into, receive the downgoing baseband high speed signal after next conversion of returning from the AU subsystem from the AU subsystem; The downgoing baseband high speed signal is sent to main AU subsystem or last from the AU subsystem; And, receive the uplink baseband high speed signal that main AU subsystem or last sends from the AU subsystem, and the number of carriers that can handle according to this locality; The carrier signal that exceeds the number of carriers that can handle this locality that comprises in the said uplink baseband high speed signal is sent to adjacent next from the AU subsystem through piling up interface; And will not send to next uplink baseband high speed signal from the AU subsystem and convert the GW upstream data into, receive the GW upstream data after next conversion of returning from the AU subsystem, the GW upstream data is sent to main AU subsystem or last from the AU subsystem.

Particularly; As shown in Figure 4; Suppose that AU subsystem 1, AU subsystem 2 and the AU subsystem 3 preset number of carriers threshold values that can handle are 10; When the included number of carriers of GW downlink data of then sending to AU subsystem 1 when the GW subsystem is 30, AU subsystem 1 will be forwarded to AU subsystem 2 to 20 carrier signals of residue that surpass threshold value through piling up interface, and the GW downlink data that will not send to AU subsystem 2 converts the downgoing baseband high speed signal into; Therefore AU subsystem 2 is judged 20 carrier signals and is also exceeded its predetermined threshold value 10, sends to AU subsystem 3 to 10 carrier signals in 20 carrier signals, and the GW downlink data that will not send to AU subsystem 3 converts the downgoing baseband high speed signal into; AU subsystem 3 is handled 10 carrier signals that AU subsystem 2 sends; And be transmitted to AU subsystem 2 to the downgoing baseband high speed signal of the AU subsystem 3 that obtains after treatment through piling up interface; The downgoing baseband high speed signal that downgoing baseband high speed signal that AU subsystem 2 obtains after handling self and AU subsystem 3 send is transmitted to AU subsystem 1, and the downgoing baseband high speed signal of AU subsystem 1, AU subsystem 2 and AU subsystem 3 being handled by AU subsystem 1 sends to EU;

When the uplink baseband high speed signal that sends to AU subsystem 1 as EU is 20 carrier waves; AU subsystem 1 will be forwarded to AU subsystem 2 to 10 carrier signals of residue that surpass threshold value 10 through piling up interface; After handling, 10 carrier signals that AU subsystem 2 will receive obtain the GW upstream data; And said GW upstream data is transmitted to AU subsystem 1 through piling up interface, AU subsystem 1 sends to the GW subsystem to the GW upstream data of GW upstream data of self handling and 2 processing of AU subsystem.

When adopting the mode networking that the AU subsystem piles up in the embodiment of the invention three; If system needs dilatation; Then only need in the machine room that sets up the AU subsystem originally, simply increase a plurality of AU subsystems; The disposal ability of system will be doubled and redoubled, and the user can not be affected fully, thereby makes the dilatation of system simple more, the dilatation cost also reduced greatly.

Exist a plurality of BBU to be directly connected to the technical scheme of the distributed BBU of RNC in the prior art, in this network architecture system, when system needs dilatation; Need in RRU and RNC, be configured,, that is to say to set up the relation of carrier wave and corresponding BBU; If 100 carrier waves of the last support of RRU; And two distributed BBU are arranged in the said system, then need preceding 50 carrier waves be configured in first BBU and go up processing, back 50 carrier waves are configured in second BBU go up processing; And in the embodiment of the invention three; When the AU subsystem finds to satisfy current carrier wave requirement, will be assigned to carrier data from the AU subsystem automatically and handle, need not GW subsystem or EU, RU etc. are provided with; Therefore, networking mode more flexibly, make things convenient for System Expansion; Simultaneously, from the engineering installation angle, the networking mode that the AU subsystem piles up in the embodiment of the invention three respectively need not to be connected with GW subsystem, EU or RU from the AU subsystem, thereby has reduced the waste that network sets up difficulty and resource.

Embodiment four:

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

Said processing unit 21 is used for the downgoing baseband high speed signal that receives is decomposed; Obtain the descending subbase band of multichannel high speed signal, and send to converting unit 22, and; The up subbase band low speed signal that receives is converged to behind the uplink baseband low speed signal, send to converting unit 22;

Said converting unit 22 is exported after being used for converting the descending subbase band high speed signal that processing unit 21 sends into descending subbase band low speed signal, and, after converting the uplink baseband high speed signal into, exports the uplink baseband low speed signal that processing unit 21 is sent.

Particularly; Converting unit 22 is carried out protocol conversion with the descending subbase band high speed signal that processing unit 21 sends, and converts the low speed agreement into from high speed protocol, obtains exporting behind the descending subbase band low speed signal; And; The uplink baseband low speed signal that processing unit 21 is sent carries out protocol conversion, is high speed protocol from the low speed protocol conversion, obtains exporting behind the uplink baseband high speed signal; Said high speed protocol comprises that IR/CPRI/OBSAI etc. supports the interface protocol of optical fiber link communication, and said low speed agreement comprises that Ethernet host-host protocol etc. supports the interface protocol of link communications such as category-5 cable, CAT5E UTP cable or netting twine.

It is to convert the original signal data of high speed protocol encapsulation that uses into use low speed protocol encapsulation that said high speed protocol converts the low speed agreement into; Said low speed protocol conversion is that high speed protocol promptly converts the original signal data of low speed protocol encapsulation that uses the encapsulation of into use high speed protocol.

Further, said processing unit 21 also is used for being directed against respectively the load capacity of said RU, and the descending subbase band of multichannel high speed signal is made up, and obtains the descending subbase band high speed signals after many groups superpose, and sends to converting unit 22; Descending subbase band high speed signal after the many groups of stacks that said converting unit 22 specifically is used for processing unit 21 is sent converts the descending subbase band low speed signal of many groups into; And send to said RU; Wherein, The RU that belongs to same sub-district receives same group of descending subbase band low speed signal, and any two RU that belong to different districts receive not descending subbase band low speed signal on the same group.

The descending subbase band of said multichannel high speed signal can be the signal of same standard, also can be the signal of multiple standard; Descending subbase band high speed signal after the said stack can be said one or more the combination in any stack of descending subbase band high speed signal.

Particularly, be example with WCDMA and GSM bimodulus, after the downgoing baseband high speed signal that said processing unit sends the AU subsystem decomposes; Obtain the descending subbase band of multichannel 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 makes up the descending subbase band of said multichannel high speed signal to the load capacity of said RU; Obtain the descending subbase band high speed signal after many groups superpose, suppose corresponding 3 RU of EU.

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

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

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

EU is to be sent to comprise for the descending subbase band high speed signal c after the stack of the 3rd RU: 2 road GSM i/q signals.

(2) for same cell pattern, when promptly each RU belongs to same sub-district:

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

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

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

Further; Descending subbase band high speed signal a, descending subbase band high speed signal b stack after and descending subbase band high speed signal c stack after of said converting unit after with said stack encapsulates respectively according to the synchronous ethernet agreement; Obtain descending subbase band low speed signal a, descending subbase band low speed signal b and descending subbase band low speed signal c; And send to first RU to said descending subbase band low speed signal a; Send to second RU to descending subbase band low speed signal b, send to the 3rd RU to descending subbase band low speed signal c.

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

Said high-speed interface 23 is supported the high-speed transfer agreement, is used to receive the downgoing baseband high speed signal and sends it to processing unit 21, and the uplink baseband high speed signal after 22 conversions of output converting unit.

Said low-speed interface 24 is supported the low speed transmissions agreement, is used to receive up subbase band low speed signal and sends it to processing unit 21, and the descending subbase band low speed signal after 22 conversions of output converting unit.

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

Said EU can be used as an independent device and exists, and also can be used as subsystem application in the wireless communication system of the embodiment of the invention one to the embodiment three said flattening network architecture.

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

Be illustrated in figure 6 as the wireless communication system architecture sketch map that adopts the networking mode of EU cascade in the embodiment of the invention four; Said wireless communication system comprises GW subsystem, AU subsystem and at least one MDAS; Said MDAS comprises at least one EU and at least one RU that links to each other with each EU, and said EU comprises two high-speed interfaces.

Particularly; For arbitrary MDAS, each EU links to each other through local high-speed interface successively, wherein; Being arranged in primary EU links to each other with an EU through a local high-speed interface with the EU that is arranged in last; All the other EU link to each other with two EU respectively through two local high-speed interfaces, and at least one RU that each EU is also corresponding with it respectively simultaneously is continuous, and are arranged in primary EU and also pass through another high-speed interface and link to each other with the AU subsystem.

As shown in Figure 6, said wireless communication system comprises MDAS1, MDAS2, MDAS3 and MDAS4, and each MDAS all links to each other with the AU subsystem through high-speed transfer links such as optical fiber; For MDAS1, it comprises M EU, is respectively EU11, EU12 ... And EU1M, each EU links to each other with N RU respectively, and like corresponding EU11, coupled RU is RU111, RU112 ... And RU11N, said M and N are positive integer.

Wherein, EU11 links to each other with the AU subsystem through first high-speed interface, links to each other with first high-speed interface of EU12 through second high-speed interface; Second high-speed interface of EU12 with ... First high-speed interface of EU1M connects, thereby forms the cascade of EU.

Particularly; In down link; After the GW downlink data that the AU subsystem sends the GW subsystem converts the downgoing baseband high speed signal into, be input to EU11 from first high-speed interface of EU11, a part of downgoing baseband high speed signal converts multichannel into through the processing unit of EU11 and converting unit and superposes behind the descending subbase band signal; From low-speed interface output, another part downgoing baseband high speed signal directly outputs to EU12 from second high-speed interface of EU11;

In up link; The up subbase band low speed signal that RU121 to RU12N sends is from the low-speed interface input of EU12; After converting the uplink baseband high speed signal into through processing unit and converting unit, be input to second high-speed interface of EU11 and first high-speed interface through EU11 sends to the AU subsystem from first high-speed interface; Simultaneously, send to the AU subsystem through first high-speed interface after the up subbase band low speed signal that also connected each RU sent of EU11 converts the uplink baseband high speed signal into.

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

Need to prove that the said wireless communication system of the embodiment of the invention can also be supported the star-like networking of EU, 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 invention five, said AU subsystem comprises receiving element 31, converting unit 32 and transmitting element 33.

Said receiving element 31 is used to receive GW downlink data and uplink baseband high speed signal; Said converting unit 32 is used for converting the said GW downlink data that receiving element 31 receives into the downgoing baseband high speed signal, and converts the said uplink baseband high speed signal that receiving element 31 receives into the GW upstream data; Said transmitting element 33 is used to send downgoing baseband high speed signal and the GW upstream data that converting unit 32 is converted to.

Particularly, said converting unit 32 is equivalent to baseband processing unit, comprises that encoding and decoding, modulation, de-interleaving interweave, encrypting and decrypting, frequency hopping, timing controlled, framing separate functions such as frame; Said transmitting element 33 also has functions such as Working Status Monitoring and alarming information report; Said receiving element 31 also has Iuh interface function, this locality and remote operation maintaining function.

Further, said AU subsystem also comprises upper strata control unit 34, and said upper strata control unit 34 comprises functions such as RRM, mobile management, MAC, RLC.

Need to prove; AU subsystem described in the embodiment of the invention five can be the arbitrary AU subsystem among embodiment two and the embodiment three; In the time of for example in the wireless communication system in being applied in embodiment three, said AU subsystem can be main AU subsystem, also can be for arbitrary from the AU subsystem.

Embodiment six:

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

After converting the downgoing baseband high speed signal into, the GW downlink data that step 101:AU subsystem sends the GW subsystem sends to EU.

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

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

Step 102:EU decomposes the downgoing baseband high speed signal that the AU subsystem sends, and obtains the descending subbase band of multichannel high speed signal, and after said descending subbase band high speed signal changed descending subbase band low speed signal, sends to RU.

Particularly; EU is used for the downgoing baseband high speed signal that the AU subsystem sends is decomposed; Obtain the descending subbase band of multichannel high speed signal,, the descending subbase band of said multichannel high speed signal is made up to the load capacity of said RU; Obtain the descending subbase band high speed signals after many group stacks, the descending subbase band high speed signals after said many group stacks are converted behind the descending subbase band low speed signals after many group stacks respectively into route and send to said one or more RU.

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

Particularly; The descending subbase band of the stack low speed signal that RU sends EU is separated the frame operation; Obtain the baseband signal of corresponding one or more patterns; And the baseband signal of different mode carried out corresponding frequency up-conversion operation respectively, it is changed into the far-end downlink radio-frequency signal of one or more patterns and sends to user terminal.

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

The up radiofrequency signal frequency conversion of far-end that RU sends user terminal is to send to EU behind the up subbase band low speed signal; Send to the AU subsystem after by EU said up subbase band low speed signal being converged and convert into the uplink baseband high speed signal; After converting said uplink baseband high speed signal into the GW upstream data by the AU subsystem, be transferred to core net through the GW subsystem.

Need to prove that wireless communications method can be supported multiple wireless communication mode described in the embodiment of the invention six, comprise GSM, WCDMA, TD-SCDMA, LTE and WLAN etc.

Embodiment seven:

The embodiment of the invention seven is elaborated to embodiment six said wireless communications methods through concrete instance; With WCDMA and GSM bimodulus is example; Suppose that the GW subsystem comprises 8 GSM carrier waves and 3 WCDMA carrier waves to the GW downlink data that the AU subsystem sends, then said wireless communications method may further comprise the steps:

Step 1: send to EU after the GW downlink data that the AU subsystem sends the GW subsystem converts the downgoing baseband high speed signal into.

Particularly; The AU subsystem carries out Base-Band Processing respectively to the GW mixing downlink data that comprises 8 GSM carrier waves and 3 WCDMA carrier waves (being said GW downlink data) that receives; Obtain the i/q signal of GSM and the i/q signal of WCDMA; And the i/q signal of the i/q signal of said GSM and WCDMA carried out the framing operation, obtain the downgoing baseband high speed signal.

Said downgoing baseband high speed signal adopts the multi-frame form transmission with a plurality of subframes, 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; Be the data structure sketch map of downgoing baseband high speed transmission of signals data in single subframe, comprise 8 road i/q signals of overhead byte, GSM standard, 3 road i/q signals of WCDMA, and idle bytes; Need to prove; Data structure shown in Figure 8 data structure for being adopted to present embodiment seven specific transmission modes when the embodiment of the invention seven adopts other transmission meanss, can be done accommodation to said data structure.

Said downgoing baseband high speed transmission of signals data one frame connects a frame and transmits; A plurality of subframes are formed a multi-frame; Multi-frame is again according to common public radio interface (The Common Public Radio Interface; CPRI) protocol encapsulation, shown in figure 10, be the CPRI package mode of 614.4Mbit/s wire rate; Need to prove; Adopt the CPRI agreement that downgoing baseband high speed transmission of signals data are encapsulated in the embodiment of the invention seven; But the embodiment of the invention seven is not limited to adopt other agreements that said downgoing baseband high speed transmission of signals data are encapsulated; For example, adopt the interface protocol that comprises support optical fiber link communications such as IR/OBSAI that data are encapsulated, data rate can be the rate requirement of other suitable system applies.

Step 2: EU decomposes the downgoing baseband high speed signal that the AU subsystem sends, and obtains the descending subbase band of multichannel high speed signal, and after said descending subbase band high speed signal changed descending subbase band low speed signal, sends to RU.

Particularly, the downgoing baseband high speed signal that the processing unit of EU sends the AU subsystem according to the CPRI agreement is separated frame and is handled, and obtains the i/q signal of multichannel WCDMA and GSM, promptly descending subbase band high speed signal; Because each subframe of in step 1, forming comprises the i/q signal of 3 road WCDMA and the i/q signal of 8 road GSM, therefore, in this step 2, the i/q signal of the GSM through separating the i/q signal that can obtain 3 tunnel WCDMA after frame is handled and 8 tunnel.

Further, the processing unit of EU makes up the descending subbase band of said multichannel high speed signal to the load capacity of said RU, obtains the descending subbase band high speed signal after many groups superpose, and supposes corresponding 3 RU of EU, is respectively RU1, RU2 and RU3.

(1) for the division cell pattern:

EU is to be sent to be comprised to the descending subbase band high speed signal a after the stack of RU1: 1 road WCDMA i/q signal and 3 road GSM i/q signals;

EU is to be sent to be comprised to the descending subbase band high speed signal b after the stack of RU2: 2 road WCDMA i/q signals and 3 road GSM i/q signals;

EU is to be sent to be comprised to the descending subbase band high speed signal c after the stack of RU3: 2 road GSM i/q signals.

(2) for same cell pattern:

EU is to be sent to be comprised to the descending subbase band high speed signal a after the stack of RU1: 3 road WCDMA i/q signals and 8 road GSM i/q signals;

EU is to be sent to be comprised to the descending subbase band high speed signal b after the stack of RU2: 3 road WCDMA i/q signals and 8 road GSM i/q signals;

EU is to be sent to be comprised to the descending subbase band high speed signal c after the stack of RU3: 3 road WCDMA i/q signals and 8 road GSM i/q signals.

Need to prove that the stacked system of above-mentioned descending subbase band high speed signal is merely illustrating of the embodiment of the invention seven, in practical application, can adjust according to cell conditions.

Further; Descending subbase band high speed signal a, descending subbase band high speed signal b stack after and descending subbase band high speed signal c stack after of the converting unit of EU after with said stack encapsulates respectively according to the synchronous ethernet agreement; Obtain descending subbase band low speed signal a, descending subbase band low speed signal b and descending subbase band low speed signal c; And send to RU1 to said descending subbase band low speed signal a; Send to RU2 to descending subbase band low speed signal b, send to RU3 to descending subbase band low speed signal c.

Need to prove; Be not limited to adopt other agreements that the descending subbase band of said stack low speed signal is encapsulated in the embodiment of the invention seven, support the interface protocol of category-5 cable, CAT5E UTP cable or netting twine that the descending subbase band of said stack low speed signal is encapsulated as adopting.

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

(1) for the division cell pattern:

The descending subbase band low speed signal a that RU1 sends EU separates frame according to the synchronous ethernet agreement and handles; Obtain carrying out frequency up-conversion operation behind 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 RU2 sends EU separates frame according to the synchronous ethernet agreement and handles; Obtain behind 2 road WCDMA i/q signals and 3 road GSM i/q signals it being carried out frequency up-conversion operation; Obtain WCDMA radiofrequency signal and GSM radiofrequency signal, and send it to user terminal;

The descending subbase band low speed signal c that RU3 sends EU separates frame according to the synchronous ethernet agreement and handles, and obtains carrying out frequency up-conversion operation behind 2 road GSM i/q signals, obtains the GSM radiofrequency signal, and sends it to user terminal.

(2) for same cell pattern:

Descending subbase band low speed signal a, b and c that RU1, RU2 and RU3 send EU respectively separate frame according to the synchronous ethernet agreement and handle; Obtain behind 3 road WCDMA i/q signals and 8 road GSM i/q signals it being carried out frequency up-conversion operation; 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 invention seven, and its uplink process is its inverse process, specifically can comprise the steps:

The first step: RU receives the up radiofrequency signal of far-end that user terminal sends; The up radiofrequency signal of this far-end is down-converted to the baseband signal of one or more patterns; After according to data structure shown in Figure 9 said baseband signal being carried out framing, adopt the synchronous ethernet agreement that it is encapsulated as up subbase band low speed signal and sends to EU.

Particularly, when the embodiment of the invention adopts other transmission meanss, can do accommodation to data structure shown in Figure 9; In addition, the up subbase band low speed signal after being not limited in this step adopt other agreements to said framing encapsulates, and supports the interface protocol of category-5 cable, CAT5E UTP cable or netting twine that it is encapsulated as adopting.

Second step: up subbase band low speed signal a ', b ' and c ' that the processing unit of EU sends RU1, RU2 and RU3 separate frame according to the synchronous ethernet agreement and handle; Obtain WCDMA i/q signal and GSM i/q signal; And according to data structure shown in Figure 9 it is reconfigured and to be subframe; A plurality of subframes are combined as multi-frame; Send to converting unit after forming the uplink baseband low speed signal that adopts the multi-frame form, converting unit obtains the uplink baseband high speed signal after said uplink baseband low speed signal is encapsulated according to the CPRI agreement, and sends it to the AU subsystem.

(1) for the division cell pattern:

2 road GSM i/q signals of 2 road WCDMA i/q signals of 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 ' are formed 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:

3 road WCDMA i/q signals of 3 road WCDMA i/q signals of 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 are formed 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 the uplink baseband low speed signal be or relation the I signal of I signal=uplink baseband low speed signal of the I signal of the I signal of promptly up subbase band low speed signal a '+up subbase band low speed signal b '+up subbase band low speed signal c '; The Q signal of Q signal=uplink baseband low speed signal of the Q signal of the Q signal of up subbase band low speed signal a '+up subbase band low speed signal b '+up subbase band low speed signal c ', symbol "+" expression " or " relation.

Converting unit obtains the uplink baseband high speed signal after said uplink baseband low speed signal is encapsulated according to the CPRI agreement, and sends it to the AU subsystem.

The 3rd step: the uplink baseband high speed signal that the AU subsystem transmits according to the employing multi-frame form that the CPRI agreement is sent EU is separated frame and is handled, and obtains the i/q signal of WCDMA and GSM, and is converted into the GW upstream data of WCDMA and GSM respectively.

Owing to adopt the CPRI agreement in the downlink transmission process of present embodiment seven downgoing baseband high speed transmission of signals data are carried out the framing operation; Therefore adopt the CPRI agreement that the uplink baseband high speed signal is separated frame in this step; In fact, can also adopt the interface protocol that comprises support optical fiber link communications such as IR/OBSAI that data are carried out to frame and separate frame and handle.

The embodiment of the invention provides a kind of wireless communication system, method and expanding unit of the flattening network architecture; The wireless communication system of the said flattening network architecture comprises GW subsystem, AU subsystem, EU and at least one RU that is connected with EU; Move down into GW subsystem and AU subsystem through function, make the structure of whole communication system further decompose and simplification, reduced network processes time delay and propagation delay time radio network controller (RNC); Improved user experience; Simultaneously, the signaling transmission node reduces, thereby has effectively improved service access efficient and switching efficiency; Simultaneously, send to RU after the downgoing baseband high speed signal that utilizes said EU that the AU subsystem is sent converts descending subbase band low speed signal into, make low speed transmissions links such as to adopt category-5 cable between EU and the RU connect; Be different from the mode of the Optical Fiber Transmission that adopts between traditional BBU and the RRU; Be convenient to indoor covering, reduced the difficulty of network design, said wireless communication system is supported 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 maintenancely, expense is lower; And said wireless shrouding system can be supported the cascade and the folded pattern of group of AU subsystem, improved system extendible capacity property, reduced the cost of System Expansion.

The above only is the preferred embodiments of the invention, and obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.

Claims

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

Said AU subsystem be used for the GW downlink data that gateway GW subsystem sends is converted into the downgoing baseband high speed signal and sends to EU, and the uplink baseband high speed signal that EU is sent converts the GW upstream data into and is transferred to core net through the GW subsystem;

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

Processing unit is used for the downgoing baseband high speed signal that the AU subsystem sends is decomposed, and obtains the descending subbase band of multichannel high speed signal; And send to converting unit; And the up subbase band low speed signal that RU is sent converges to behind the uplink baseband low speed signal, sends to converting unit;

Converting unit; Be used for converting the descending subbase band high speed signal that processing unit sends into descending subbase band low speed signal, and send to said RU, and; After the uplink baseband low speed signal that processing unit is sent converts the uplink baseband high speed signal into, send to the AU subsystem.

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

Said processing unit also is used for respectively the load capacity to said RU, and the descending subbase band of multichannel high speed signal is made up, and obtains the descending subbase band high speed signals after many group stacks, and sends to converting unit;

Said converting unit; Descending subbase band high speed signal after the many groups of stacks that specifically are used for processing unit is sent converts the descending subbase band low speed signal of many groups into; And send to said RU; Wherein, the RU that belongs to same sub-district receives same group of descending subbase band low speed signal, and any two RU that belong to different districts receive not descending subbase band low speed signal on the same group.

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

Said AU subsystem is connected through the high-speed transfer link with EU;

Said EU is connected through the low speed transmissions link with RU.

5. wireless communication system as claimed in claim 1 is characterized in that, said wireless communication system comprises a plurality of AU subsystems;

Each AU subsystem links to each other through local subtending port successively;

To arbitrary AU subsystem; Specifically be used for when its next adjacent AU subsystem interrupted with being connected of GW subsystem; Receive the GW downlink data that the GW subsystem sends to next adjacent AU subsystem, and be sent to next adjacent AU subsystem through the subtending port of this locality, and; Subtending port through this locality receives adjacent next AU subsystem GW upstream data to be sent, and is sent to the GW subsystem.

6. wireless communication system as claimed in claim 1 is characterized in that, said wireless communication system comprises a plurality of AU subsystems, and one of them AU subsystem is main AU subsystem, and all the other AU subsystems are from the AU subsystem;

Said main AU subsystem links to each other with EU with the GW subsystem respectively, links to each other successively from the interface that piles up of AU subsystem through this locality, and wherein first is connected with main AU subsystem through piling up interface from the AU subsystem;

7. an expanding unit EU is characterized in that, comprises processing unit and converting unit:

8. EU as claimed in claim 7 is characterized in that,

Said processing unit also is used for respectively the load capacity to the RU that receives descending subbase band low speed signal, and the descending subbase band of multichannel high speed signal is made up, and obtains the descending subbase band high speed signals after many group stacks, and sends to converting unit;

9. EU as claimed in claim 7 is characterized in that, said EU also comprises high-speed interface and low-speed interface:

Said high-speed interface is used to receive the downgoing baseband high speed signal and sends it to processing unit, and the uplink baseband high speed signal after the conversion of output converting unit;

Said low-speed interface is used to receive up subbase band low speed signal and sends it to processing unit, and the descending subbase band low speed signal after the conversion of output converting unit.

10. like the arbitrary described EU of claim 7 to 9, it is characterized in that said EU also comprises:

The clock synchronization unit is used to carry out the clock synchronization of high-speed interface and low-speed interface.

11. one kind is inserted the AU subsystem, it is characterized in that said AU subsystem comprises:

Receiving element is used to receive gateway GW downlink data and uplink baseband high speed signal;

12. the wireless communications method of a flattening network architecture is characterized in that, said method comprises:

After converting the downgoing baseband high speed signal into, the GW downlink data that access AU subsystem sends gateway GW subsystem sends to expanding unit EU;

EU decomposes said downgoing baseband high speed signal, obtains the descending subbase band of multichannel high speed signal, and after converting said descending subbase band high speed signal into descending subbase band low speed signal, sends to radio frequency extension apparatus RU;

13. the wireless communications method of a flattening network architecture is characterized in that, said method comprises:

The up radiofrequency signal frequency conversion of far-end that radio frequency extension apparatus RU sends user terminal is to send to expanding unit EU behind the up subbase band low speed signal;

EU sends to access AU subsystem after said up subbase band low speed signal is converged and convert into the uplink baseband high speed signal;

The AU subsystem is transferred to core net through the GW subsystem after converting said uplink baseband high speed signal into gateway GW upstream data.