CN103813413A - Method and device for improving data transmission based on local exchange and base station - Google Patents
Method and device for improving data transmission based on local exchange and base station Download PDFInfo
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- CN103813413A CN103813413A CN201210451175.5A CN201210451175A CN103813413A CN 103813413 A CN103813413 A CN 103813413A CN 201210451175 A CN201210451175 A CN 201210451175A CN 103813413 A CN103813413 A CN 103813413A
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Abstract
The invention aims at providing a method and a device for improving data transmission based on local exchange and a base station. The base station receives an informing message relevant to local exchange of data transmission between two user devices from a mobile management device. RRC connection reconfiguration is conducted on a first user device and a second user device respectively, and a coding mode of down exchange data is indicated to the first user device and the second user device. First data transmitted by the first user device and second data transmitted by the second user device are received, the first data and the second data are subjected to network coding, the down exchange data obtained through the processing are transmitted to the first user device and the second user device to enable the first user device and the second user device to extract the second data and the first data from the down exchange data according to the indication message respectively. By means of the method, the device and the base station, time frequency resources are saved, the spectrum efficiency is remarkably improved, and the explosive flow effect is reduced.
Description
Technical field
The present invention relates to mobile communication technology field, relate in particular to a kind of for improve the technology of transfer of data based on local exchange.
Background technology
The research of having carried out shows, in GSM network, in the call of being processed by base station controller (base stationcontroller, BSC), on average having 30% call is local call.Analyze by the bill to some operators, this numeral even reaches 60%.Although LTE network is not made a concrete analysis of, its situation should with GSM network class seemingly.
At some population close quarterses, and rural area or remote districts, most call (comprising calling party and callee) all occurs in same base station (eNodeB), or in one group of base station.
In addition, the application that can continue for some time for application or the large flow of the large flow of some flareds, such as Emule, BT etc., it will increase the load of network, use the service of normal discharge or fixed bit rate (Guaranteed Bit Rate, GBR) to impact to other simultaneously.
Therefore, the have nothing for it but transmission cost of local call both expensive of operator, also may face the risk that user satisfaction is lower.In emerging market, transmission cost has occupied the major part in operator's total cost, and user satisfaction directly affects the market share of operator.
In current LTE network, there is no with the similar node of GSM and judge communicating pair, as calling party and callee, whether belong to the coverage of same base station.In traditional solution based on existing LTE agreement, local call can produce backhaul transport.Mobile Transmission data are sent to the most contiguous switching node from base station, then are returned to this base station.Fig. 1 and Fig. 2 show in traditional solution, belong to the subscriber equipment 1 of same base station scope and subscriber equipment 2 and carry out the process of transfer of data.Wherein, subscriber equipment 1 is calling party, and subscriber equipment 2 is callee.Fig. 1 has described its data transmission procedure from the angle of subscriber equipment 1, and Fig. 2 has described its data transmission procedure from the angle of subscriber equipment 2.
In Fig. 1, subscriber equipment 1 is by random access procedure access base station, and connect with base station, the initial user equipment message of subscriber equipment 1 (initial UE message) is sent to mobile management device (Mobility Management Entity by base station, MME), set up after request (initial context setup request) message at the initial context that receives MME transmission, base station is connected and is reshuffled by the RRC to subscriber equipment 1, complete the foundation of initial context, subsequently, set up after request (E-RABsetup request) message at the RAB that receives MME transmission, base station is again connected and is reshuffled by the RRC to subscriber equipment 1, RAB (the Evolved Radio Access Bear of completing user equipment 1, E-RAB) foundation.So far, subscriber equipment 1 can carry out transfer of data with MME.
In Fig. 2, MME passes through Non-Access Stratum (Non-Access Stratum according to subscriber equipment 1, the relevant information of the subscriber equipment 2 that its plan of NAS) transmitting is conversed, by to home subscriber server (Home Subscriber Server, HSS) inquiry obtains the information of subscriber equipment 2, and by this subscriber equipment 2 of base station calling, subsequently, subscriber equipment 2, by the mode identical with subscriber equipment 1, completes from establishing connections to base station the up-downgoing transmission of carrying out data with MME.
Summary of the invention
The object of this invention is to provide a kind of for improve method, device and the base station of transfer of data based on local exchange.
According to an aspect of the present invention, provide a kind of for improve the method for transfer of data in local exchange at base station end group, wherein, the method comprises:
A receives about the notification message that the transfer of data between two subscriber equipmenies is carried out to local exchange from mobile management device, wherein, plan is carried out the coverage that the first user equipment of transfer of data and the second subscriber equipment all belong to this base station, and described notification message comprises the information of the information of described first user equipment and described the second subscriber equipment and RAB separately thereof;
B carries out RRC to described first user equipment and described the second subscriber equipment respectively and is connected and reshuffles, wherein, be connected with the RRC that described the second subscriber equipment sends the indication information that reconfiguration message comprises the coded system that is used to indicate descending swap data to described first user equipment respectively;
The second data that c is received from the first data of described first user equipment transmission and sends from described the second subscriber equipment, wherein, described the first data are to be transmitted to described the second subscriber equipment, and described the second data are to be transmitted to described first user equipment;
D carries out network code processing to described the first data and described the second data, and be sent to described first user equipment and described the second subscriber equipment by processing the descending swap data obtaining, respectively according to described indication information, in described descending swap data, extract described the second data and described the first data for it.
According to another aspect of the present invention, also provide a kind of for improve the device of transfer of data in local exchange at base station end group, wherein, this device comprises:
Notice receiving system, for receiving about the notification message that the transfer of data between two subscriber equipmenies is carried out to local exchange from mobile management device, wherein, plan is carried out the coverage that the first user equipment of transfer of data and the second subscriber equipment all belong to this base station, and described notification message comprises the information of described first user equipment and described the second subscriber equipment and the information of various RAB thereof;
RRC reshuffles device, be connected and reshuffle for respectively described first user equipment and described the second subscriber equipment being carried out to RRC, wherein, be connected with the RRC that described the second subscriber equipment sends the indication information that reconfiguration message comprises the coded system that is used to indicate descending swap data to described first user equipment respectively;
Data sink, for the second data that are received from the first data of described first user equipment transmission and send from described the second subscriber equipment, wherein, described the first data are to be transmitted to described the second subscriber equipment, and described the second data are to be transmitted to described first user equipment;
Data coding device, for described the first data and described the second data are carried out to network code processing, and be sent to described first user equipment and described the second subscriber equipment by processing the descending swap data obtaining, respectively according to described indication information, in described descending swap data, extract described the second data and described the first data for it.
According to a further aspect of the invention, also provide a kind of for improve the base station of transfer of data based on local exchange, wherein, this base station comprise as aforementioned according to a further aspect of the present invention for improve the device of transfer of data in local exchange at base station end group.
The present invention is based on network coding technique, by local exchange information is made full use of, in saving running time-frequency resource, significantly promoted spectrum efficiency, and reduced the impact of explosion type flow, and the transmission cost of operator.
Accompanying drawing explanation
By reading the detailed description that non-limiting example is done of doing with reference to the following drawings, it is more obvious that other features, objects and advantages of the present invention will become:
Fig. 1 illustrates from subscriber equipment 1 angle the flow chart that belongs to the subscriber equipment 1 of same base station scope and subscriber equipment 2 traditional solution and carry out transfer of data;
Fig. 2 illustrates from subscriber equipment 2 angles the flow chart that belongs to the subscriber equipment 1 of same base station scope and subscriber equipment 2 traditional solution and carry out transfer of data;
Fig. 3 illustrates under local exchange situation that subscriber equipment 1 and subscriber equipment 2 are via the schematic diagram of base station exchange packet A and packet B;
Fig. 4 illustrates the schematic diagram of packet A and packet B shared running time-frequency resource unit in transmitting procedure under local exchange situation;
Fig. 5 illustrates the flow chart that improves according to an embodiment of the invention transfer of data between subscriber equipment 1 and subscriber equipment 2 based on local exchange;
Fig. 6 illustrates the schematic diagram that transmits packet A and packet B according to subscriber equipment 1 of the present invention and subscriber equipment 2 via base station based on local exchange;
Fig. 7 illustrates the schematic diagram of the shared running time-frequency resource unit in transmitting procedure according to packet A of the present invention and packet B;
Fig. 8 illustrates the schematic diagram that improves according to an embodiment of the invention the device of transfer of data between subscriber equipment 1 and subscriber equipment 2 at base station end group in local exchange.
In accompanying drawing, same or analogous Reference numeral represents same or analogous parts.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
For reducing the backhaul transport in local call, consider to introduce local exchange function.Core net, typically, as mobile management device (Mobility Management Entity, MME), judges communicating pair based on its known user equipment information, as calling party and callee, whether belongs to the coverage of same base station.If this time call is local call, MME sends the notification message about local exchange to base station, base station is relevant RAB (the Evolved Radio Access Bear of communicating pair accordingly, E-RAB) set up local exchange data path, and allow the initiation of local call and finish to carry out local exchange from same base station.
But even under the situation of local exchange, subscriber equipment 1 and subscriber equipment 2 are as wished to realize mutual exchange data packets A and packet B by following 4 steps, and need take 4 running time-frequency resource unit.Consult Fig. 3 and Fig. 4, Fig. 3 illustrates subscriber equipment 1 and subscriber equipment 2 process via base station exchange packet A and packet B, and Fig. 4 illustrates packet A and packet B shared running time-frequency resource unit in transmitting procedure.
1) subscriber equipment 1 sends packet A to base station, need to take 1 up running time-frequency resource unit;
2) subscriber equipment 2 sends packet B to base station, need to take 1 up running time-frequency resource unit;
3) packet A is forwarded to subscriber equipment 2 by base station, need to take 1 descending running time-frequency resource unit;
4) packet B is forwarded to subscriber equipment 1 by base station, need to take 1 descending running time-frequency resource unit.
The operator of the throughput of system of being devoted to provide higher for those and the peak data rate of Geng Gao, it to more effectively the utilizing and compatibility to different application of frequency spectrum resource, comprises that those have the application of outburst traffic requirement by striving for.But because this kind of explosion type traffic transport only can be processed according to set Maximum Bit Rate (Aggregate Maximum Bit Rate, AMBR) in base station, this will reduce the user's who uses normal transmission satisfaction.
The invention provides a kind of scheme of improving transfer of data between subscriber equipment 1 and subscriber equipment 2 based on local exchange.Wherein, in the time that a new connection is set up, when MME finds to intend the subscriber equipment 1 that communicates and subscriber equipment 2 and belong to together the coverage of a base station, MME sends the indication information about local exchange to this base station, and base station is set up the data path of local exchange accordingly for the relevant RAB of subscriber equipment 1 and subscriber equipment 2.Subsequently, network code processing is carried out to packet A and the packet B of its transmission respectively to subscriber equipment 1 and subscriber equipment 2 in base station, and processing acquisition packet C is broadcast to subscriber equipment 1 and subscriber equipment 2, subscriber equipment 1 and subscriber equipment 2 are respectively according to its packet A separately and data B this packet C that decodes, the packet B and the packet A that send to oneself therefrom to extract the other side.
At this, as an example of the present invention, the foundation of above-mentioned local exchange data path and the network code processing to packet A and packet B can be realized by the specific device of installing and moving wherein in base station.
Fig. 5 is method flow diagram according to an embodiment of the invention, illustrates that base station improves the process of transfer of data between subscriber equipment 1 and subscriber equipment 2 based on local exchange.
Particularly, in step S1, base station 3 receives about the notification message that the transfer of data between two subscriber equipmenies is carried out to local exchange from mobile management device (MME) 4, wherein, the subscriber equipment 1 that plan is carried out transfer of data and subscriber equipment 2 all belong to the coverage of this base station 3, and this notification message comprises the information of subscriber equipment 1 and the information of subscriber equipment 2 and RAB separately thereof.
In random access procedure, after base station 3 connects with subscriber equipment 1, the initial user equipment message of subscriber equipment 1 is sent to MME4 by base station 3, and subscriber equipment 1 also passes to MME4 by NAS by the relevant information of subscriber equipment 2, MME4 obtains the information of subscriber equipment 2 to HSS request, comprise the identification information of subscriber equipment 2 and affiliated base station thereof, in the time that MME4 finds that subscriber equipment 1 and subscriber equipment 2 all belong to the coverage of same base station 3, MME4 sends the notification message about local exchange to this base station 3, information comprising subscriber equipment 1 with the information of subscriber equipment 2 and RAB separately thereof, be that subscriber equipment 1 is set up local exchange data path with the RAB of subscriber equipment 2 subsequently for base station 3, thereby realize the data of transmitting between two equipment are carried out to local exchange, and without passing through again core net.
In step S1, base station 3 is carried out RRC to subscriber equipment 1 and subscriber equipment 2 respectively and is connected and reshuffles, wherein, the RRC sending with subscriber equipment 2 to subscriber equipment 1 is respectively connected the indication information that reconfiguration message comprises the coded system that is used to indicate descending swap data.
At this, base station 3 sends RRC to subscriber equipment 1 with subscriber equipment 2 respectively and is connected reconfiguration message, connects at sent RRC the indication information that adds the coded system that is used to indicate descending swap data in reconfiguration message; Wherein, this descending swap data means base station 3 and the data at subscriber equipment 1 and subscriber equipment 2 its place that is sent to is carried out to the data that obtain after network code is processed, and after these data, will be broadcast to subscriber equipment 1 and subscriber equipment 2 by base station 3.Be connected reconfiguration message when subscriber equipment 1 with subscriber equipment 2 according to this RRC and carry out after RRC reshuffled, it can send to base station 3 RRC and connect the information of having reshuffled; Correspondingly, the RRC of base station 3 reshuffles device 32 and receives its RRC that subscriber equipment 1 sends with subscriber equipment 2 and be connected the information of having reshuffled.
Preferably, the RRC that base station 3 sends with subscriber equipment 2 to subscriber equipment 1 is respectively connected reconfiguration message and comprises that RRC reshuffles Proprietary Information (Radio Resource Config Dedicatedinfo), in reshuffling Proprietary Information, this RRC adds network code indication information, as be used to indicate the indication information of the coded system of descending swap data, to indicate local exchange packet to encode by network code mode to subscriber equipment 1 and subscriber equipment 2.
Be below to comprise that the RRC of network code indication information reshuffles an example of Proprietary Information:
In a preferred embodiment, this process can also comprise step S5 (not shown), and in step S5, base station 3 sends about completing the notification message that the transfer of data between subscriber equipment 1 and subscriber equipment 2 is carried out to local exchange to MME4.
Preferably, MME4 can set up request message by RAB and carry out informing base station 3 and set up local exchange for subscriber equipment 1 and the transfer of data of subscriber equipment 2, correspondingly, base station 3 also can be set up response message by RAB and notifies MME4 successfully to set up local exchange data path for subscriber equipment 1 to the relevant RAB of subscriber equipment 2.
For example, MME4 sends RAB to base station 3 and sets up request message, this RAB is set up request message and is comprised about the notification message that the transfer of data between subscriber equipment 1 and subscriber equipment 2 is carried out to local exchange, to inform the information of the information of these base station 3 subscriber equipmenies 1 and subscriber equipment 2 and RAB separately thereof, make base station 3 to carry out local exchange to the data of transmission between the two; Correspondingly, base station 3 receives this RAB from MME4 and sets up request message.
As an example, below illustrate that the RAB that comprises above-mentioned notification message sets up request message:
Wherein, the global identity of base station (Global eNB ID) is used to indicate the mark of subscriber equipment 1 base station, place.If subscriber equipment 1 (calling party) and subscriber equipment 2 (callee) belong to the coverage of same base station, this information element will there will not be.If RAB is set up the global identity that request message comprises base station, it can be used to one group of exchanges data between base station.
ENB UE S1AP mark (eNB UE S1AP ID) is used to indicate in the base station identifying at the global identity of above-mentioned base station the identity of subscriber equipment 2 (callee).
Wireless access bearing sign (E-RAB ID) is used to indicate the relevant RAB that can carry out to the RAB of subscriber equipment 2 (callee) subscriber equipment 1 (calling party) of local exchange.
Subsequently, in step S2, base station 3 is carried out RRC to subscriber equipment 1 and subscriber equipment 2 and is connected and reshuffle, and indicates the data that both are uploaded to carry out the coded system of network code processing to subscriber equipment 1 and subscriber equipment 2.Base station 3 completes the foundation of the local exchange data path to subscriber equipment 1 and subscriber equipment 2.
In step S3, base station 3 sends RAB and sets up response message, and this RAB is set up response message and comprised the notification message that the transfer of data between subscriber equipment 1 and subscriber equipment 2 is carried out to local exchange about completing.
As an example, below illustrate and comprise that the above-mentioned RAB that completes notification message sets up response message:
If local exchange is successfully established mark (Local Switching Setup Success Flag) and is not included in RAB and sets up in response message, this means that current base station edition do not support local exchange function.If it is wrong (FALSE) that local exchange is successfully established the value of mark, this means that base station is that subscriber equipment 1 is set up the failure of local exchange data path to the relevant RAB of subscriber equipment 2; If it is true (TURE) that local exchange is successfully established the value of mark, this means that base station is that subscriber equipment 1 is successfully set up local exchange data path to the relevant RAB of subscriber equipment 2.
Successfully setting up after local exchange data path for the relevant RAB (E-RAB) of subscriber equipment 1 and subscriber equipment 2, base station 3 is received from the packet A that subscriber equipment 1 sends and the packet B sending from subscriber equipment 2, wherein, packet A is to be transmitted to subscriber equipment 2, and packet B is to be transmitted to subscriber equipment 1.
In step S4, network code processing is carried out to packet A and packet B in base station 3, and be sent to subscriber equipment 1 and subscriber equipment 2 by processing the descending swap data obtaining, respectively according to the indication information of the coded system that is used to indicate this descending swap data being sent to before, certainly in this descending swap data, extract packet B and packet A for it.
At this, because subscriber equipment 1 and subscriber equipment 2 are all known the packet A and the packet B that himself are sent to base station 3, receiving the base station 3 descending swap data after treatment of encoding, after packet C, according to the coded system of this packet C and belong to its oneself packet A and packet B, subscriber equipment 1 can extract and obtain packet B from this packet C, and subscriber equipment 2 can extract and obtain packet A from this packet C.
Preferably, consult Fig. 6 and Fig. 7, in step S3, base station 3 receives the packet B that packet A that subscriber equipment 1 sends and subscriber equipment 2 send, and at this, subscriber equipment 1 and subscriber equipment 2 take respectively a up running time-frequency resource unit; The network code processing that base station 3 adopts comprises XOR, in step S4, XOR is carried out to packet A and packet B in base station 3 in bit-level, and the packet C that computing is obtained is broadcast to subscriber equipment 1 and subscriber equipment 2, for its respectively according to the indication information about the coded system of packet C with and known packet A and packet B separately, to packet C decoding, and therefrom extract data B and packet A.Also, packet C is broadcast to subscriber equipment 1 and subscriber equipment 2 by base station 3, subscriber equipment 1 can according to the coded system of packet C with and send packet A, from this packet C, extract packet B; Similarly, subscriber equipment 2 also can according to the coded system of packet C with and send packet B, from this packet C, extract packet A.In downlink transfer, base station 3 also only needs to take a running time-frequency resource unit can send data to subscriber equipment 1 and subscriber equipment 2, has effectively saved frequency spectrum resource.
Also,, according to above preferred embodiment, running time-frequency resource unit shared in whole data transmission procedure is as follows:
1) subscriber equipment 1 sends packet A to base station, need to take 1 up running time-frequency resource unit;
2) subscriber equipment 2 sends packet B to base station, need to take 1 up running time-frequency resource unit;
3) network code processing is carried out to packet A and packet B in base station, as XOR, obtains packet
wherein, the size of packet C is the size of the greater among packet A and packet B, i.e. sizeof (C)=max (sizeof (A), sizeof (B));
4) packet C is broadcast to subscriber equipment 1 and subscriber equipment 2 by base station, need to take 1 descending running time-frequency resource unit.
Subsequently, subscriber equipment 1 and subscriber equipment 2 extract respectively its data that need from packet C,
The above-mentioned XOR to packet A and packet B, is reduced to 3 Resource Units by running time-frequency resource consumption from 4 Resource Units before, has effectively improved the throughput of community, and has reduced the impact of explosion type flow.
Fig. 8 is an apparatus in accordance with one embodiment of the invention schematic diagram, is illustrated in base station end group and improves in local exchange the LSU local switching unit 30 of transfer of data between subscriber equipment 1 and subscriber equipment 2.As shown in Figure 8, LSU local switching unit 30 is installed in base station 3, comprises that notice receiving system 31, RRC reshuffle device 32, data sink 33 and data coding device 34.
Particularly, notice receiving system 31 receives about the notification message that the transfer of data between two subscriber equipmenies is carried out to local exchange from mobile management device (MME) 4, wherein, the subscriber equipment 1 that plan is carried out transfer of data and subscriber equipment 2 all belong to the coverage of this base station 3, and this notification message comprises the information of subscriber equipment 1 and the information of subscriber equipment 2 and RAB separately thereof.
In random access procedure, after base station 3 connects with subscriber equipment 1, the initial user equipment message of subscriber equipment 1 is sent to MME4 by base station 3, and subscriber equipment 1 also passes to MME4 by NAS by the relevant information of subscriber equipment 2, MME4 obtains the information of subscriber equipment 2 to HSS request, comprise the identification information of subscriber equipment 2 and affiliated base station thereof, in the time that MME4 finds that subscriber equipment 1 and subscriber equipment 2 all belong to the coverage of same base station 3, MME4 sends the notification message about local exchange to this base station 3, information comprising subscriber equipment 1 with the information of subscriber equipment 2 and RAB separately thereof, be that subscriber equipment 1 is set up local exchange data path with the RAB of subscriber equipment 2 subsequently for base station 3, thereby realize the data of transmitting between two equipment are carried out to local exchange, and without passing through again core net.
RRC reshuffles device 32 and respectively subscriber equipment 1 and subscriber equipment 2 is carried out to RRC and be connected and reshuffle, and wherein, the RRC sending with subscriber equipment 2 to subscriber equipment 1 is respectively connected the indication information that reconfiguration message comprises the coded system that is used to indicate descending swap data.
At this, RRC reshuffles device 32 and sends RRC to subscriber equipment 1 with subscriber equipment 2 respectively and be connected reconfiguration message, connects at sent RRC the indication information that adds the coded system that is used to indicate descending swap data in reconfiguration message; Wherein, this descending swap data means base station 3 and the data at subscriber equipment 1 and subscriber equipment 2 its place that is sent to is carried out to the data that obtain after network code is processed, and after these data, will be broadcast to subscriber equipment 1 and subscriber equipment 2 by base station 3.After being connected reconfiguration message with subscriber equipment 2 according to this RRC when subscriber equipment 1 and having reshuffled, it can send to base station 3 RRC and connect the information of having reshuffled; Correspondingly, the RRC of base station 3 reshuffles device 32 and receives its RRC that subscriber equipment 1 sends with subscriber equipment 2 and be connected the information of having reshuffled.
Preferably, RRC reshuffles RRC that device 32 sends with subscriber equipment 2 to subscriber equipment 1 respectively and is connected reconfiguration message and comprises that RRC reshuffles Proprietary Information (Radio ResourceConfig Dedicated info), in reshuffling Proprietary Information, this RRC adds network code indication information, as be used to indicate the indication information of the coded system of descending swap data, to indicate local exchange packet to encode by network code mode to subscriber equipment 1 and subscriber equipment 2.
Be below to comprise that the RRC of network code indication information reshuffles an example of Proprietary Information:
In a preferred embodiment, LSU local switching unit 30 can also comprise notice feedback device (not shown), and it is for sending about completing the notification message that the transfer of data between subscriber equipment 1 and subscriber equipment 2 is carried out to local exchange to MME4.
Preferably, MME4 can set up request message by RAB and carry out informing base station 3 and set up local exchange for subscriber equipment 1 and the transfer of data of subscriber equipment 2, correspondingly, base station 3 also can be set up response message by RAB and notifies MME4 successfully to set up local exchange data path for subscriber equipment 1 to the relevant RAB of subscriber equipment 2.
For example, MME4 sends RAB to base station 3 and sets up request message, this RAB is set up request message and is comprised about the notification message that the transfer of data between subscriber equipment 1 and subscriber equipment 2 is carried out to local exchange, to inform the information of the information of these base station 3 subscriber equipmenies 1 and subscriber equipment 2 and RAB separately thereof, make base station 3 to carry out local exchange to the data of transmission between the two; Correspondingly, the notice receiving system 31 of base station 3 receives this RAB from MME4 and sets up request message.
As an example, below illustrate that the RAB that comprises above-mentioned notification message sets up request message:
Wherein, the global identity of base station (Global eNB ID) is used to indicate the mark of subscriber equipment 1 base station, place.If subscriber equipment 1 (calling party) and subscriber equipment 2 (callee) belong to the coverage of same base station, this information element will there will not be.If RAB is set up the global identity that request message comprises base station, it can be used to one group of exchanges data between base station.
ENB UE S1AP mark (eNB UE S1AP ID) is used to indicate in the base station identifying at the global identity of above-mentioned base station the identity of subscriber equipment 2 (callee).
Wireless access bearing sign (E-RAB ID) is used to indicate the relevant RAB that can carry out to the RAB of subscriber equipment 2 (callee) subscriber equipment 1 (calling party) of local exchange.
Subsequently, RRC reshuffles device 32 and subscriber equipment 1 and subscriber equipment 2 are carried out to RRC connects and reshuffle, and indicates the data that both are uploaded to carry out the coded system of network code processing to subscriber equipment 1 and subscriber equipment 2.Base station 3 completes the foundation of the local exchange data path to subscriber equipment 1 and subscriber equipment 2.
Notice feedback device sends RAB to MME4 and sets up response message, and this RAB is set up response message and comprised the notification message that the transfer of data between subscriber equipment 1 and subscriber equipment 2 is carried out to local exchange about completing.
As an example, below illustrate and comprise that the above-mentioned RAB that completes notification message sets up response message:
If local exchange is successfully established mark (Local Switching Setup Success Flag) and is not included in RAB and sets up in response message, this means that current base station edition do not support local exchange function.If it is wrong (FALSE) that local exchange is successfully established the value of mark, this means that base station is that subscriber equipment 1 is set up the failure of local exchange data path to the relevant RAB of subscriber equipment 2; If it is true (TURE) that local exchange is successfully established the value of mark, this means that base station is that subscriber equipment 1 is successfully set up local exchange data path to the relevant RAB of subscriber equipment 2.
The relevant RAB (E-RAB) that is subscriber equipment 1 and subscriber equipment 2 at LSU local switching unit 30 is successfully set up after local exchange data path, data sink 33 is received from the packet A that subscriber equipment 1 sends and the packet B sending from subscriber equipment 2, wherein, packet A is to be transmitted to subscriber equipment 2, and packet B is to be transmitted to subscriber equipment 1.
Data coding device 34 carries out network code processing to packet A and packet B, and be sent to subscriber equipment 1 and subscriber equipment 2 by processing the descending swap data obtaining, respectively according to the indication information of the coded system that is used to indicate this descending swap data being sent to before, certainly in this descending swap data, extract packet B and packet A for it.
At this, because subscriber equipment 1 and subscriber equipment 2 are all known the packet A and the packet B that himself are sent to base station 3, receiving the base station 3 descending swap data after treatment of encoding, after packet C, according to the coded system of this packet C and belong to its oneself packet A and packet B, subscriber equipment 1 can extract and obtain packet B from this packet C, and subscriber equipment 2 can extract and obtain packet A from this packet C.
Preferably, consult Fig. 6 and Fig. 7, data sink 33 receives the packet B that packet A that subscriber equipment 1 sends and subscriber equipment 2 send, and at this, subscriber equipment 1 and subscriber equipment 2 take respectively a up running time-frequency resource unit; The network code processing that data coding device 34 adopts comprises XOR, data coding device 34 carries out XOR to packet A and packet B in bit-level, and the packet C that computing is obtained is broadcast to subscriber equipment 1 and subscriber equipment 2, for its respectively according to the indication information about the coded system of packet C with and known packet A and packet B separately, to packet C decoding, and therefrom extract data B and packet A.Also, packet C is broadcast to subscriber equipment 1 and subscriber equipment 2 by data coding device 34, subscriber equipment 1 can according to the coded system of packet C with and send packet A, from this packet C, extract packet B; Similarly, subscriber equipment 2 also can according to the coded system of packet C with and send packet B, from this packet C, extract packet A.In downlink transfer, base station 3 also only needs to take a running time-frequency resource unit can send data to subscriber equipment 1 and subscriber equipment 2, has effectively saved frequency spectrum resource.
Also,, according to above preferred embodiment, running time-frequency resource unit shared in whole data transmission procedure is as follows:
1) subscriber equipment 1 sends packet A to base station, need to take 1 up running time-frequency resource unit;
2) subscriber equipment 2 sends packet B to base station, need to take 1 up running time-frequency resource unit;
3) network code processing is carried out to packet A and packet B in base station, as XOR, obtains packet
wherein, the size of packet C is the size of the greater among packet A and packet B, i.e. sizeof (C)=max (sizeof (A), sizeof (B));
4) packet C is broadcast to subscriber equipment 1 and subscriber equipment 2 by base station, need to take 1 descending running time-frequency resource unit.
Subsequently, subscriber equipment 1 and subscriber equipment 2 extract respectively its data that need from packet C,
The above-mentioned XOR to packet A and packet B, is reduced to 3 Resource Units by running time-frequency resource consumption from 4 Resource Units before, has effectively improved the throughput of community, and has reduced the impact of explosion type flow.
It should be noted that the present invention can be implemented in the assembly of software and/or software and hardware, for example, can adopt application-specific integrated circuit (ASIC) (ASIC), general object computer or any other similar hardware device to realize.
Software program of the present invention can carry out to realize step mentioned above or function by processor.Similarly, software program of the present invention (comprising relevant data structure) can be stored in computer readable recording medium storing program for performing, for example, and RAM memory, magnetic or CD-ROM driver or floppy disc and similar devices.In addition, steps more of the present invention or function can adopt hardware to realize, for example, thereby as coordinate the circuit of carrying out each function or step with processor.
In addition, a part of the present invention can be applied to computer program, and for example computer program instructions, in the time that it is carried out by computer, by the operation of this computer, can call or provide the method according to this invention and/or technical scheme.And call the program command of method of the present invention, may be stored in fixing or movably in recording medium, and/or be transmitted by the data flow in broadcast or other signal bearing medias, and/or be stored in according in the working storage of the computer equipment of described program command operation.At this, according to one embodiment of present invention, it comprises a device, this device comprises memory for storing computer program instructions and the processor for execution of program instructions, wherein, in the time that this computer program instructions is carried out by this processor, trigger this device and move based on aforementioned according to the method for multiple embodiment of the present invention and/or technical scheme.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and in the situation that not deviating from spirit of the present invention or essential characteristic, can realize the present invention with other concrete form.Therefore, no matter from which point, all should regard embodiment as exemplary, and be nonrestrictive, scope of the present invention is limited by claims rather than above-mentioned explanation, is therefore intended to all changes that drop in the implication and the scope that are equal to important document of claim to be included in the present invention.Any Reference numeral in claim should be considered as limiting related claim.In addition, obviously other unit or step do not got rid of in " comprising " word, and odd number is not got rid of plural number.Multiple unit of stating in system claim or device also can be realized by software or hardware by a unit or device.The first, the second word such as grade is used for representing title, and does not represent any specific order.
Claims (13)
1. for improve a method for transfer of data in local exchange at base station end group, wherein, the method comprises:
A receives about the notification message that the transfer of data between two subscriber equipmenies is carried out to local exchange from mobile management device, wherein, plan is carried out the coverage that the first user equipment of transfer of data and the second subscriber equipment all belong to this base station, and described notification message comprises the information of the information of described first user equipment and described the second subscriber equipment and RAB separately thereof;
B carries out RRC to described first user equipment and described the second subscriber equipment respectively and is connected and reshuffles, wherein, be connected with the RRC that described the second subscriber equipment sends the indication information that reconfiguration message comprises the coded system that is used to indicate descending swap data to described first user equipment respectively;
The second data that c is received from the first data of described first user equipment transmission and sends from described the second subscriber equipment, wherein, described the first data are to be transmitted to described the second subscriber equipment, and described the second data are to be transmitted to described first user equipment;
D carries out network code processing to described the first data and described the second data, and be sent to described first user equipment and described the second subscriber equipment by processing the descending swap data obtaining, respectively according to described indication information, in described descending swap data, extract described the second data and described the first data for it.
2. method according to claim 1, wherein, described network code processing comprises XOR, wherein, described steps d comprises:
-described the first data and described the second data are carried out to XOR, and the descending swap data that computing is obtained is sent to described first user equipment and described the second subscriber equipment, respectively according to described the first data and described second data of described indication information and transmission separately, in described descending swap data, extract described the second data and described the first data for it.
3. method according to claim 1 and 2, wherein, after described step b, the method also comprises:
X sends about completing the notification message that described transfer of data is carried out to local exchange to described mobile management device.
4. method according to claim 3, wherein, described step a comprises:
-receiving RAB from described mobile management device to set up request message, described RAB is set up request message and is comprised described about the notification message that the transfer of data between described first user equipment and described the second subscriber equipment is carried out to local exchange;
Wherein, described step x comprises:
-sending RAB to described mobile management device to set up response message, described RAB is set up response message and is comprised described about completing the notification message that described transfer of data is carried out to local exchange.
5. according to the method described in any one in claim 1 to 4, wherein, be connected reconfiguration message and comprise that RRC reshuffles Proprietary Information with the RRC that described the second subscriber equipment sends to described first user equipment respectively, described RRC reshuffles Proprietary Information and is used to indicate described in comprising the indication information of the coded system of data to be transmitted.
6. according to the method described in any one in claim 1 to 5, wherein, described step b comprises:
-send described RRC to described first user equipment with described the second subscriber equipment respectively and be connected reconfiguration message;
-receive it from described first user equipment with described the second subscriber equipment respectively and be connected the notification message of having reshuffled about RRC accordingly.
7. for improve a device for transfer of data in local exchange at base station end group, wherein, this device comprises:
Notice receiving system, for receiving about the notification message that the transfer of data between two subscriber equipmenies is carried out to local exchange from mobile management device, wherein, plan is carried out the coverage that the first user equipment of transfer of data and the second subscriber equipment all belong to this base station, and described notification message comprises the information of described first user equipment and described the second subscriber equipment and the information of various RAB thereof;
RRC reshuffles device, be connected and reshuffle for respectively described first user equipment and described the second subscriber equipment being carried out to RRC, wherein, be connected with the RRC that described the second subscriber equipment sends the indication information that reconfiguration message comprises the coded system that is used to indicate descending swap data to described first user equipment respectively;
Data sink, for the second data that are received from the first data of described first user equipment transmission and send from described the second subscriber equipment, wherein, described the first data are to be transmitted to described the second subscriber equipment, and described the second data are to be transmitted to described first user equipment;
Data coding device, for described the first data and described the second data are carried out to network code processing, and be sent to described first user equipment and described the second subscriber equipment by processing the descending swap data obtaining, respectively according to described indication information, in described descending swap data, extract described the second data and described the first data for it.
8. device according to claim 7, wherein, described network code processing comprises XOR, wherein, described data coding device is used for:
-described the first data and described the second data are carried out to XOR, and the descending swap data that computing is obtained is sent to described first user equipment and described the second subscriber equipment, respectively according to described the first data and described second data of described indication information and transmission separately, in described descending swap data, extract described the second data and described the first data for it.
9. according to the device described in claim 7 or 8, wherein, this device also comprises:
Notice feedback device, for sending about completing the notification message that described transfer of data is carried out to local exchange to described mobile management device.
10. device according to claim 9, wherein, described notice receiving system is used for:
-receiving RAB from described mobile management device to set up request message, described RAB is set up request message and is comprised described about the notification message that the transfer of data between two subscriber equipmenies is carried out to local exchange;
Wherein, described notice feedback device is used for:
-sending RAB to described mobile management device to set up response message, described RAB is set up response message and is comprised described about completing the notification message that described transfer of data is carried out to local exchange.
11. according to the device described in any one in claim 7 to 10, wherein, be connected reconfiguration message and comprise that RRC reshuffles Proprietary Information with the RRC that described the second subscriber equipment sends to described first user equipment respectively, described RRC reshuffles Proprietary Information and is used to indicate described in comprising the indication information of the coded system of descending swap data.
12. according to the device described in any one in claim 7 to 11, wherein, described RRC reshuffle device for:
-send described RRC to described first user equipment with described the second subscriber equipment respectively and be connected reconfiguration message;
-receive it from described first user equipment with described the second subscriber equipment respectively and be connected the notification message of having reshuffled about RRC accordingly.
13. 1 kinds for improving the base station of transfer of data based on local exchange, wherein, this base station comprise as described in any one in claim 7 to 12 for improve the device of transfer of data in local exchange at base station end group.
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