CN103688566A

CN103688566A - Multicast grouping

Info

Publication number: CN103688566A
Application number: CN201280030950.8A
Authority: CN
Inventors: S-J·阿科拉; T·科斯克拉; S·蒂尔蒂南
Original assignee: Zyray Wireless Inc
Current assignee: Broadcom Corp; Zyray Wireless Inc
Priority date: 2011-06-23
Filing date: 2012-06-25
Publication date: 2014-03-26
Also published as: WO2012176179A1; DE112012002577T5

Abstract

A coexistence central entity CCE receives deployment messages from each of a plurality of N access nodes. Each deployment message has an identifier of an access node of the plurality and an identifier of a channel in a license-exempt band. From the received deployment messages the CCE compiles and maintains a database which associates each channel with a multicast group. Each multicast group includes all of the access nodes from which was received at least one deployment message identifying a said channel corresponding thereto. When the CCE receives a multicast message from one of the access nodes identifying a givenchannel, it checks the database to find members of a multicast group associated with the givenchannel, and notifies at least some of those members of the received multicast message. In this manner the access node's multicast message is forwarded among the whole group.

Description

Multicast grouping

Technical field

Example of the present invention and unrestricted embodiment mainly relate to wireless communication system, method, equipment and computer program, and relate more specifically between a plurality of access points of identical or different radio access technologies to coordinate for be called alternatively share frequency band exempt from unlicensed radio frequency spectrum, communicate by letter.

Background technology

The following abbreviation that definition can be found in specification and/or accompanying drawing is as follows:

3GPP third generation partner program

AP access point

BS base station

The CCE central entity that coexists

CCE-PE central entity-the peer-entities that coexists

CM coexistence manager

The base station of e Node B LTE/LTE-A system

FCC Federal Communications Committee

ID identifier

IEEE Institute of Electrical and Electric Engineers

IP Internet protocol

ISM industry, science and medical science

LTE (evolution UTRAN system) Long Term Evolution

LTE-A Long Term Evolution-senior

MAC media interviews are controlled

RAT radio access technologies

SBD-SN shares frequency band and disposes support node

SSID service set identifier

The white space of TV WS TV

UE subscriber equipment

UTRAN universal terrestrial radio electricity access network

WLAN WLAN (wireless local area network)

For preventing that congested mode is to non-cellular network, such as WLAN shunts some wireless flows to cellular core network because wireless data amount and wireless user's number constantly increase, the access point of these non-cellular networks provides the access to internet.Yet offsetting the data traffic of prediction completely, the gain of the expection that can't expect such flow shunt and improve from spectrum efficiency increases.Thereby, except more expensive licensed spectrum, between radio network operator and user's hand-held set and the manufacturer of the network equipment, also discuss radio-frequency spectrum exempted to license part for wireless flow.Like this exempt from licensed spectrum also referred to as one or more shared frequency band, and for example comprise ISM frequency band and TV WS, at the FCC of the U.S., considering that ISM frequency band and TV WS are for this purposes.

In practice, shared frequency band like this can be by licensed spectrum system coordination, or they can be by independent community, such as LTE-A femto (femto) community is used, and this Femto cell provides the quick access of internet in the similar mode of WLAN standard at IEEE802.11.LTE-A Femto cell is the spectrum efficiency of the raising in LTE-A compared with the advantage of traditional WLAN, this be by such as the flexibility of LTE when the carrier number of bandwidth, utilization is disposed in management and even its centre frequency flexibly reconfigure such concept and realize.

M-A.Phan at Ericsson Research, H.Wiemann and J.Sachs's, title is Flexible Spectrum Usage-How LTE Can Meet Future Capacity Demands[ITG FG5.2.4workshop, on July 8th, 2008] article in and also the Rui Yang's of InterDigital Communications LLC, title is Overview of Research Projects with NYU-Poly[2010 November 12] summary in discuss LTE-A extended to and shares on frequency band and some problem of expecting for such extension.

Such problem is that the potential interference how to manage between a plurality of AP/BS that dispose in shared frequency band by effective effect is realized coexisting of they.Whether the different AP/BS of this interference problem all exist on identical or different RAT, because be to pay close attention to place in the interference of sharing on frequency band.

A kind of mode that is independent of RAT for managing the routine of the such interference on TV WS is to use so-called coexistence manager (CM), sets forth and illustrate at Fig. 1 the framework of this CM in IEEE802.19 task groups 1.CM is the function operating on radio access technologies.It has the interface with other coexistence manager entities/servers.By CM, different RAT can be in the control of consulting each other spectrum utilization or obedience CM, and local of this CM is used in the spectrum utilization of sharing frequency spectrum.

Summary of the invention

In the first example embodiment of the present invention, there is a kind of device, this device comprises a treatment system, this treatment system for example form is at least one memory of at least one processor and storage computer program.In this embodiment, treatment system for being used when accessing database, and database is arranged to keep the data of indicating channel and multicast group, and each access node that treatment system is arranged to from a plurality of N access node receives deployment message.Each disposes the identifier that message at least comprises the channel in the identifier of the given access node in a plurality of access nodes and a plurality of channels in exempting from licensed band, and wherein N is greater than one integer.Treatment system is arranged to according to the deployment message compiling receiving with maintenance data base so that associated channel and described multicast group described in each, described in each, multicast group at least comprises the access node that receives at least one deployment message from it, and this disposes the message identifier described channel corresponding with this access node.

In the second example embodiment of the present invention, a kind of method of accessing database is provided, database is arranged to keep the data of indicating channel and multicast group, the method comprises: each access node from a plurality of N access node receives disposes message, each disposes the identifier that message at least comprises the channel in the identifier of the given access node in a plurality of access nodes and a plurality of channels in exempting from licensed band, and wherein N is greater than one integer; And according to the deployment message receiving, compiling with maintenance data base so that associated channel and described multicast group described in each, described in each, multicast group at least comprises the access node that receives at least one deployment message from it, and this disposes the message identifier described channel corresponding with this access node.

In the 3rd example embodiment of the present invention, a kind of computer-readable medium of storing computer program is provided, computer program comprises instruction set, instruction set makes computing equipment carry out following steps when the computing equipment by managing with database manipulation is carried out, and database is arranged to keep the data of indicating channel and multicast group:

Each access node from a plurality of N access node receives disposes message, each disposes the identifier that message at least comprises the channel in the identifier of the given access node in a plurality of access nodes and a plurality of channels in exempting from licensed band, and wherein N is greater than one integer; And

According to the deployment message receiving, compiling is with maintenance data base so that associated channel and described multicast group described in each, and described in each, multicast group at least comprises from it and receives the access node that at least one disposes message, and this deployment message identifier is the described channel of correspondence with it.

The following specifically describes these and other embodiment and aspect.

Accompanying drawing explanation

Fig. 1 diagram is used for the framework of the coexistence manager as set forth at IEEE802.19.1.

Fig. 2 is that diagram can advantageously realize the schematic diagram of the environment of embodiments of the invention therein.

Fig. 3 is the signaling diagram that the channel of an example embodiment of diagram basis is selected, selected establishment multicast group and utilize information to member's distribution channels of relevant multicast group according to channel.

Fig. 4 is that diagram is according to the logical flow chart of the execution result of the operation of the method for example embodiment of the present invention and the computer program instructions that embodies on computer-readable memory.

Fig. 5 is and simplified block diagram at the various network device similar with UE of the network equipment shown in Fig. 2 and UE that these network equipments and UE are the exemplary electronic device that is suitable for using when realizing example embodiment of the present invention.

Embodiment

Term access node is used as in the following description the eNodeB, the access point AP of wlan system that are independent of RAT and comprise LTE-A system, the access node of the Node B of UTRAN system, micro-or femto access node and other RAT.Access node is provided for the wider network of one or more subscriber equipment access, such as the wireless communications of internet or PSTN.In some RAT, access node can be embodied as bear to other subscriber equipment the subscriber equipment of the function of access is provided, such as the AP station in WLAN.Term access node is other variation of cover relay stations, long haul radio head end and BS also.

At Fig. 2, following environment is shown, can in this environment, advantageously realizes embodiments of the invention.This exemplary arrangement comprises can be according to similar RAT or according to two or dissimilar RAT(for example LTE-A and WLAN) three different access nodes 22,24 and 26 of operation.Although each access node can provide connection to one or more subscriber equipment, clear in order to illustrate, only for access node 22, such subscriber equipment or UE20 are shown.Only enumerate two possibilities, each access node has and can be implemented as CM(and see Fig. 1 and IEEE802.19.1) or the communication link of the central entity CCE28 that coexists of SBD-SN.In other embodiments, access node or more one of high-level network node (such as Mobility Management Entity or the gateway of LTE-A system) can serve this CCE function.These links between access node 22,24,26 and CCE28 can be directly or can pass other entity, such as intermediate server, and these links can be wired (comprising optical link), wireless or the two certain combination.Below describe to provide at UE corresponding to them between the first access node 22 and the second access node 24 and sharing the details that communicates to avoid mutually causing interference on frequency band.

Suppose the channel on the shared frequency band of the first access node 22 selection.Then the first access node 22 sends the information referred to herein as deployment information or deployment message to CCE28.In various example embodiment, CCE28 can be that the CM(as in IEEE802.19.1 is shown in Fig. 1) or bear the network entity/server of the function of SBD-SN.The deployment information that the first access node 22 sends in its deployment message comprises for it to the key parameter of the set use of shared frequency band, as for example channel and through-put power.This deployment message also will comprise the identifier that sends the first access node 22 of disposing message.Therefore, if for example the first access node 22 is LTE eNodeB, node identifier can Shi Ta community ID, and if the first access node 22 is WLAN AP, node identifier can be its SSID.The ID of other type can be for the access node operating in the RAT of other type.

Identifier for access node can be at the body of disposing message itself.Or use an embodiment of Internet protocol, identifier can be as sender address in message header for communication link---disposing message transmits to CCE28 from the first access node 22 by this communication link---therein.In this case, identifier can be the URL(uniform resource locator)/Uniform Resource Identifier based on web (URL/URI) of the first access node, and at least the first access node 22 will be by registered in advance to CCE28, this CCE is corresponding community ID or the SSID of URL/URI of storage first access node identical with this in its memory.

Dispose message and can identify the channel of sharing in frequency band by channel indexes, such as wherein having the TV WS(similar to the WS of TV shown in Fig. 1 database or other shared band spectrum) database, various access nodes can be inquired about this database and may still less easily be disturbed to understand which channel of sharing in bandwidth.Alternatively, disposing message can be frequency band by channel identification, such as centre frequency or bandwidth or be frequency range simply.

In any case indicate access node identifier and channel logo in disposing message, CCE28 receives these from a plurality of access nodes and disposes a plurality of deployment message message, and may can send for sharing a plurality of deployment message of the different channels of frequency band by any given access node.In the ordinary course of things, can suppose to have access node and a limited number of channel in shared frequency band (situation of being indexed for channel can have the channel integer number I that is greater than) of integer number N.In this layout, CCE28 can receive one or more deployment message by each access node from a plurality of N access node, and each is disposed message and comprises the identifier of n the access node that it comes from and the identifier of i channel in shared frequency band.These dispose message can carry more information, but CCE28 will be used these two different information to build its database.

All these that receive according to CCE28 are disposed message, and it forms database, each different i channel of this database association and referred to herein as the multicast group of i multicast group, because each i channel has an only associated group.The member of any given multicast group comprises all following access nodes, and CCE228 has received at least one deployment message of the identifier with i channel from these access nodes.CCE28 carrys out maintenance data base by abandon following those access nodes from various multicast groups, and the deployment message for relevant i channel of these access nodes is expired.In one embodiment, i given channel in disposing message, be specified for this channel use the concrete end time through out-of-date become expired.In another embodiment, i given channel becomes expired at CCE28 when association messages is removed in access node reception.The 3rd embodiment is following the two combination: channel is conventionally expired owing to going association messages to become, if CCE28 does not receive the association messages that goes for this channel but the time in disposing message itself or certain default time section pass, CCE228 acquiescence makes correlated channels expired.In this way, CCE28 is based on sharing the channel creation taking on frequency band and safeguarding multicast group.

In this point shown in the signaling diagram of Fig. 3, this figure is used similar to Fig. 2 for three access nodes 22,24 and 26 and for the label of CCE28.Three access nodes 22,24,26 can be called CCE-PE alternatively as enumerated at Fig. 3.Above describe and the following description relevant with Fig. 4 in, N is used for representing a plurality of access nodes.In Fig. 3, X and Y are used for representing two different channels in shared frequency band.

The channel X that the first access node 22 is selected to share in frequency band is used for the UE20 with it and sends sign channel X and the deployment message 302 of itself to CCE28.At piece 304, CCE304 recognizes the multicast group being pre-existing in not existing for channel X, so CCE28 creates a multicast group and the first access node 22 only has a member as its.Then, CCE28 receives another deployment message 306 that also identifies channel X and sign the second access node 24.CCE28 receives the 3rd of sign channel X and the 3rd access node 26 and disposes message 308.According to these two additional messages 306,308, CCE28 adds the second and the 3rd access node 24,26 these two newcomers at piece 310 to the multicast group of the existence for channel X.

The first access node 22 sends subsequently another and disposes message 312, this deployments message identifier itself and all the channel X in sharing frequency band and channel Y(this can be to want while frequency of utilization adjacent channel because of the first access node 22).Alternatively, this deployment message 312 can identify centre frequency and bandwidth, this center and bandwidth just cross over channel X and channel Y the two at least partly; In addition, because the first access node 22 is to CCE notification channel X, so dispose message 312, can only identify channel Y.When disposing message 312 sign channel X and channel Y, when receiving this deployment message 312, its database of CCE28 inquiry and understand the first access node 22 be the member of the multicast group associated with channel X, therefore for this multicast group without further operation.About channel Y, CCE28 also recognizes the multicast group being pre-existing in not existing for channel Y, so it creates a multicast group and the first access node 22 only has a member as its.

Suppose these four dispose message be CCE28 receive only have deployment message, the theing contents are as follows of database (wherein database at least the exclusive identifier of RAT for various access node members) so:

Remaining step shown in Fig. 3 relates to the distribution information relevant to the use of shared band channel with access node with message.More specifically, in example, the first access node 22 sends multicast message 316 to CCE28.The first access node 22 that this message 316 was not originally created and sent it to the direct multicast of other access node 24,26 but only by CCE28 multicast.In the embodiments of figure 3, this original multicast message is to channel X addressing.At piece 318, CCE24 use the channel X from multicast message 316 enter database, read the multicast group associated with channel X all members identifier and at message 316-1 and 316-2, to all members of this multicast group, forward the multicast message of the first access node.In another embodiment, in corresponding multicast group except originally receiving all members the access node member of multicast message 316 or only forwarded 316-1,316-2 multicast message 316 to the member in certain the geographical neighborhood in sending the first access node 22 from it.

Addressing different system is used the address of which type and at the frequency channels of piece 318 execution, to multicast address mapping, is possible for CCE28 in its database according to CCE28.In one embodiment, this mapping (this mapping obtains the multicast message 316-1 for forwarding, the address of 316-2) is IPv4 or IPv6 address and/or ethernet mac address.In another embodiment, this mapping use the multicast message 316-1 that forwards, the exclusive address of RAT that 316-2 is sent to, such as the radio net temporary identifier RNTI for LTE system.Database can have the different address styles for different access nodes, therefore in an implementation, one or more multicast message in multicast message 316-1, the 316-2 forwarding can be addressed to IPv4/IPv6 address, and other address of multicast message 316-1, the 316-2 of identical forwarding can be RNTI.

In an implementation, on the channel identifying, send all message shown in Fig. 3 in message: on channel X, send message 302,306,308,316,316-1 and 316-2; And message 312 can be two different messages, and one of them message sends on channel X, and another sends on channel Y, or it can be near the message sending the centre frequency of these two (adjacent) channels.In another implementation, dispose message by for example, not passing on to CCE28 sharing control link on frequency band (through higher network node, such as the wired Internet of Mobility Management Entity connects or control link), but multicast message is to send on the channel being addressed to respectively at them, this channel is the channel X for multicast message 316 in the example of Fig. 3.For the implementation that wherein different access nodes operate on different RAT, they may be without the ability of mutual radio communication, in this case, dispose message 302,306,308,312 and multicast message 316,316-1,316-2 for example sends or for CCE28, has the situation of many RAT ability to each access node, to send (for robustness, this is not preferably sharing in band channel) on wireless backhaul connects to each access node in cabled digital subscribers feeder DSL connection.

Each option in these options is given two advantages.First, except identifying the suitable channel (this may relate to the TV WS database of inquiry as in Fig. 1) of sharing in frequency band, access node all without monitoring any shared band channel until the deployment message of its its this shared frequency band of sign of transmission.Secondly, access node all without blind Detecting on this shared channel to find whether other access node uses it, because they can read the exclusive ID(of RAT or other unique ID to them) multicast message 319-1, the 319-2 of the forwarding of addressing.

In this way, take share certain channel in frequency band any access node can with by indicating channel, number (such as TV channel, this TV channel is implicitly mapped to certain part of sharing band spectrum) or by indicating certain frequency and bandwidth (this centre frequency and bandwidth can be considered as crossing over carrier wave or the pseudo channel on shared frequency spectrum of a plurality of TV channels) to communicate by letter with other system/access node on this concrete channel.As described above, in this example, CCE28 receives to sharing concrete channel (X) frequency spectrum or the multicast message 316 of frequency-addressing from access node 22.CCE28 has mapping entity, and this shines upon the channel usage of the different access nodes 22,24,26 of entity record and is each channel creation address table, so it can create to multicast message 316-1, the 316-2 of correct recipient's access node 24,26 addressing.

Take share the access node 22 of the channel (X) on frequency spectrum can be by sending more higher layer message 316-1 and 316-2 via message 316 and CCE28 in multicast mode to other access point 24,26 that takies same channel (X) for the database of accessing it as the address reference for CCE28 with channel number.When receiving multicast message 316 from access node 22, CCE28 check channel number and generate it to in database, quote with channel number the multicast message that associated access node address forwards.

In another embodiment, CCE28 is constructs database as described in detail for Fig. 3 above, but during the multicast message 316 that it receives from the first access node 22 in 316-1 and 316-2 distribution, the access node that it makes it that re-transmission is sent to is limited to drop on from it and receives those access nodes in the predetermined geographic neighborhood of access node 22 of multicast message 316.This more limited re-transmission of multicast message also can be got rid of CCE28 and originally from it, receive the access node 22 of multicast message 316.(and CCE28 also store in its database) geographical location information that CCE28 can provide based on indivedual access nodes 22,24,26 for this purpose filters multicast group.In this way, no matter minimum from the interference potentiality of more remote nodes, CCE28 makes its channel multicast message forward all members that only limit to certain geographic area rather than multicast group.

By the embodiment describing with reference to Fig. 3, the multicast group based on channel occupancy can be for the interference coordination between different access nodes and management.Considering that wherein the access node in identical shared band channel is not coordinated in the situation of (such as Femto cell) mutually, not not coordinating access node and can utilize the distribution procedure at Fig. 3 to carry out exchange message via the multicast to concrete channel like this, but the information comprising at multicast message 316 in this case, can be used to form nigh difference and not coordinate the neighborhood between Femto cell.

As the embodiments of the invention of describing by example above and be specially the special-purpose multicast grouping of channel following technique effect is provided, this technique effect for realize frequency coexistence access node 22,24,26 and may even identical shared band radio electric resources on different RAT systems between efficient communication mechanism.CCE28 coordinates this efficient communication mechanism just.

Above Fig. 4 describes the logical flow chart of an exemplary embodiment of the present invention from the angle of CCE28.The step that the computer program that Fig. 4 representative is stored in the local storage of CCE28 or implementation algorithm are carried out and illustrate wherein CCE28(or its one or more parts) be arranged to operation and the concrete mode of the method that makes the operation of CCE/ electronic equipment.The concrete outcome of the logic circuit unit of various a plurality of couplings that also can be considered as being configured to carrying out correlation function shown in Fig. 4 or the computer program code string stored in memory.

Such piece and the function of their representatives are non-limiting example, and are implemented in can be at various parts, such as integrated circuit (IC) chip and module, and can in being presented as the device of integrated circuit, realize example embodiment of the present invention.One or more integrated circuit can comprise or the multinomial circuit arrangement (and possibility firmware) that can be arranged to one or more data processor, one or more digital signal processor, baseband circuit device and the radio circuit device that operate according to example embodiment of the present invention for embodying.

Piece 402 and 404 relates to a plurality of deployment message construction databases that receive according to CCE28, and piece 406 relates to the given multicast message that distribution CCE also receives.At piece 402, CCE28 each access node from a plurality of N access node receives disposes message, and each disposes the identifier (N is greater than one integer) that message at least comprises the channel in the identifier of the given access node in a plurality of access nodes and a plurality of channels in exempting from licensed band.Attention can have by CCE28 cooperation more than N access node, but in the example of Fig. 4, the individual current participation of only N in them.Then at piece 404, CCE compiles and maintenance data base according to the deployment message receiving: each channel of database association and corresponding multicast group, and each multicast group at least comprises all access nodes that receive at least one deployment message from it, disposes the message identifier described channel corresponding with access node.

In response to for example, receive the multicast message of the given channel of sign from one of access node (the first access node 22), distribution of information at piece 406 finds CCE28, and this adopts two different steps: utilize database to determine the member's (these members comprise access node 24 and 26 at Fig. 3) with the multicast group of given channels associated; And at least some members in definite member notify the multicast group corresponding with the multicast message receiving.Piece 406 is optional, because be useful on the alternate manner that utilizes the database creating.

As described in detail for Fig. 3, the database of the compiling of piece 402 comprises the address table for the identifier of each channel.CCE28 utilizes database with the Channel Access Data Unit storehouse being addressed to by the multicast message based on receiving at piece 406, to determine the member of given multicast group.The member of relevant multicast group is at least used for the identifier (for example for the RNTI of LTE, for the SSID of WLAN) of the exclusive type of the RAT of operation by corresponding member and identifies in database itself.

The more parts of Fig. 4 relate to specific implementation and embodiment, some specific implementations in these specific implementations and embodiment and embodiment, such as step 408 is optional.Suppose from 406 minutes photos and sending messages of piece, then at piece 408, the member of the multicast group of notifying at piece 406 is only those members in the predetermined geographic neighborhood of the access node (22) with from its reception multicast message.As above, say, at the multitransmission of identical message, comprise that the sender of multicast message may be poor efficiency, therefore in the bracket of piece 408, get rid of notice and originally from it, received the access node (22) of multicast message itself.

The notice of piece 410 indicator collets 406 forwards via message as mentioned above.Forward not only and only to have a mode for what distribute this information; CCE28 can be from the multicast message of reception is replayed into format, thereby the information of distribution is not the definite copy of the information of the only reformed reception in address.

At piece 412, to following member, forward the multicast message receiving on the channel of step 406 sign, from database, obtain these members' identifier.As described in detail above, those addresses from database can be RAT special use and/or IPv4/IPv6 and/or ethernet mac address.

Referring now to Fig. 5, this figure is for illustrating the various electronic equipments that are suitable for using when realizing example embodiment of the present invention and the simplified block diagram of device.In Fig. 5, the first access node 22 is suitable for by wireless link C and mobile device, such as mobile terminal or UE20 communicate by letter.The first access node 22 can be BS or the AP of grand eNodeB, WLAN AP, femto e Node B or other type.

For complete, UE20 comprises processing unit, such as at least one data processor (DP) 20A, storage device, such as at least one computer-readable memory (MEM) 20B of storage at least one computer program (PROG) 20C and communicator, such as transmitter TX20D and receiver RX20E for via one or more antenna 20F and the first access node 22 two-way wireless communications.

The first access node 22 similarly comprises processing unit, such as at least one data processor (DP) 22A, storage device, such as at least one computer-readable memory (MEM) 22B of storage at least one computer program (PROG) 22C and communicator, such as the transmitter TX22D for via one or more antenna 22F and UE20 two-way wireless communication and receiver RX22E.Have and in Fig. 5, be called the data of link A and/or control path, this path coupling the first access node 22 and CCE28, and by this path, the first access node 22 sends its deployment message 302 and the multicast message 316 and/or by this path of starting, and that its reception relates to is shared/exempt from multicast message 316-1, the 316-2 of the forwarding of licensed band.As described in detail above, the first access node 22 in its local MEM22B, store relate to exempt from licensed band this radio resource deployment information 22G in order to avoid disturb other access node, the first access node has received the multicast message for the forwarding of these other access nodes.

Similarly, CCE28 comprise processing unit, such as at least one data processor (DP) 28A, storage device, such as at least one computer-readable memory (MEM) 28B of storage at least one computer program (PROG) 28C and communicator, such as for via link A and the first access node 22 and also via the modulator-demodulator 28H of another link B and the second access node 24 two-way communications.Although for UE20 or the first access node 22 or the second access node 24 concrete diagram, but also suppose that those equipment comprise the part as their radio communication device of modulator-demodulator, this modulator-demodulator can be built on the radio frequency front-end chip in those equipment 20,22,24, and this chip is also loaded with TX20D/22D/24D and RX20E/22E/24E.CCE28 is also at its local storage 28G stored data base, and this database is constructed and safeguarded in its as described in detail above such, and this database is enumerated multicast group membership corresponding to each channel who enjoys together in frequency band.

The second access node 24 comprise it processing unit, such as at least one data processor (DP) 24A, storage device, such as at least one computer-readable memory (MEM) 24B of storage at least one computer program (PROG) 24C and communicator, such as for via one or more antenna 24F under its control with transmitter TX24D and the receiver RX24E of other UE two-way wireless communication.Have and be called the data of link B and/or control path, this path coupling the second access node 24 and CCE28, and the second access node by this path send it deployment and multicast message and/or reception relate to shared/exempt from multicast message 316-1, the 316-2 of the forwarding of licensed band.The second access node 24 is stored message and the shared frequency band deployment information similar with shared frequency band deployment information to the message of describing for the first access node 22 above at 24G at its local MEM24B.

Suppose that at least one PROG in the PROG28C in CCE28 comprises program command, these program command can operate according to example embodiment of the present invention as described in detail above equipment when being carried out by associated DP28A.The first and second access nodes 22,24 also have in their corresponding MEM, store for implementing the software aspect some of these instructions.With regard to these, example embodiment of the present invention can be at least partly can be implemented or implement by hardware implementation or by the combination of the software and hardware (and software of tangible storage) of tangible storage by the DP28A of CCE28 and/or by the computer software that the DP22A/24A of corresponding access node 22,24 carries out by what store on MEM28B, 22B, 26B.The electronic equipment of implementing these aspects of the present invention is without being complete device as described at Fig. 5, but embodiment can be implemented by one or more parts of these equipment, software, hardware, firmware and DP such as tangible storage described above or SOC (system on a chip) SOC or application-specific integrated circuit ASIC.

The various embodiment of computer-readable MEM20B, 22B, 24B and 28B comprise be suitable for any data storage technology type of local technical environment, the storage component part that includes but not limited to based semiconductor, magnetic memory during and system, optical memory device and system, read-only storage, detachable memory, disk storage, flash memory, DRAM, SRAM, EEPROM etc.The various embodiment of DP20A, 22A, 24A and 28A include but not limited to all-purpose computer, special-purpose computer, microprocessor, digital signal processor (DSP) and polycaryon processor.In addition, can advantageously use some features in the various features of above unrestricted embodiment and the corresponding feature of using other description.Describe above and therefore should be considered as only giving an example rather than limiting principle of the present invention, instruction and example embodiment.

Claims

1. the device for using when the accessing database, described database is arranged to keep the data of indicating channel and multicast group, and described device comprises treatment system, and described treatment system is arranged to:

Each access node from a plurality of N access node receives disposes message, each disposes the identifier that message at least comprises the channel in the identifier of the given access node in described a plurality of access node and a plurality of channels in exempting from licensed band, and wherein N is greater than one integer; And

According to the deployment message of described reception, compiling with safeguard described database so that associated channel and described multicast group described in each, described in each, multicast group at least comprises the described access node that receives at least one deployment message from it, the described channel that described deployment message identifier is corresponding with described access node.

2. device according to claim 1, wherein said treatment system is arranged to:

In response to receiving multicast message from one of described access node, described multicast message identifies described channel, utilizes described database to determine the member with the multicast group of described channels associated; And

At least some members in described definite member notify the described multicast group corresponding with the multicast message receiving.

3. device according to claim 2, described definite member of the multicast message of the notified described reception of wherein said multicast group be except receive the described access node of described multicast message from it, described multicast group the member with receiving from it in predetermined geographic neighborhood of described access node of described multicast message.

4. according to claim 2 or device claimed in claim 3, the multicast message that wherein said treatment system is arranged to forward described reception to described at least some members in described definite member of described multicast group is to notify thus the multicast message of described reception to described at least some members in described definite member of described multicast group.

According to claim 2 to the device described in the arbitrary claim in claim 4, the database of wherein said compiling comprises the address table for each identifier of each channel, and described treatment system is arranged to utilize described database with by using the described channel that the multicast message of described reception is addressed to visit described database, and determine the described member with the described multicast group of described channels associated.

6. device according to claim 5, the described member of wherein said multicast group is at least used for the identifier of type of radio access technologies special use of operation and identifies by having corresponding member in described database.

According to claim 2 to the device described in the arbitrary claim in claim 4, wherein on given channel, receive described multicast message, and described treatment system is arranged to by using the identifier obtain from described database for each member in described at least some members in described definite member, the multicast message that forwards described reception at described given channel, to described given channel corresponding to described definite member of multicast group in described at least some members notify the multicast message of described reception.

8. for a method for accessing database, described database is arranged to keep the data of indicating channel and multicast group, and described method comprises:

9. method according to claim 8, also comprises:

10. method according to claim 9, described definite member of the multicast message of the notified described reception of wherein said multicast group be except receive the described access node of described multicast message from it, described multicast group the member with receiving from it in predetermined geographic neighborhood of described access node of described multicast message.

11. according to claim 9 or method claimed in claim 10, wherein by forwarding the multicast message of described reception, notifies the multicast message of described reception to described at least some members in described definite member of described multicast group.

12. according to claim 9 to the method described in the arbitrary claim in claim 11, the database of wherein said compiling comprises the address table for each identifier of each channel, and described method comprises and utilizes described database to use the described channel that the multicast message of described reception is addressed to visit described database to determine that described member with the described multicast group of described channels associated comprises.

13. methods according to claim 12, the described member of wherein said multicast group is at least used for the identifier of type of radio access technologies special use of operation and identifies by having corresponding member in described database.

14. according to claim 9 to the method described in the arbitrary claim in claim 11, wherein:

On given channel, receive described multicast message; And

The identifier obtaining from described database by each member in described at least some members to in described definite member, the multicast message that forwards described reception at described given channel, notify the multicast message of described reception to described at least some members in described definite member of the multicast group corresponding with described given channel.

15. 1 kinds of computer-readable mediums of storing computer program, described computer program comprises instruction set, described instruction set makes described computing equipment carry out following steps when the computing equipment by associated with database manipulation is carried out, and described database is arranged to keep the data of indicating channel and multicast group:

16. computer-readable mediums according to claim 15, wherein said instruction set also makes described computing equipment:

In response to receive the multicast message of the described channel of sign from one of described access node, utilize described database to determine the member with the multicast group of described channels associated; And

17. computer-readable mediums according to claim 16, described definite member of the multicast message of the notified described reception of wherein said multicast group be except receive the described access node of described multicast message from it, described multicast group the member with receiving from it in predetermined geographic neighborhood of described access node of described multicast message.

18. according to the computer-readable medium described in claim 16 or claim 17, and the described member of wherein said multicast group is at least used for the identifier of type of radio access technologies special use of operation and identifies by having corresponding member in described database.

19. according to claim 16 to the computer-readable medium described in the arbitrary claim in claim 18, and the database of wherein said compiling comprises the address table for each identifier of each channel; And

Described instruction set makes described computing equipment utilize described database with by using database described in the described channel access that the multicast message of described reception is addressed to, and determines the described member with the described multicast group of described channels associated.

20. according to claim 16 to the computer-readable medium described in the arbitrary claim in claim 18, wherein on given channel, receives described multicast message; And

Described instruction set makes the identifier that described computing equipment obtains from described database by each member in described at least some members to in described definite member, the multicast message that forwards described reception at described given channel, notifies the multicast message of described reception to described at least some members in described definite member of the multicast group corresponding with described given channel.