CN102281187A - System and method for realizing local exchange transmission and base station - Google Patents
System and method for realizing local exchange transmission and base station Download PDFInfo
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- CN102281187A CN102281187A CN2010102068388A CN201010206838A CN102281187A CN 102281187 A CN102281187 A CN 102281187A CN 2010102068388 A CN2010102068388 A CN 2010102068388A CN 201010206838 A CN201010206838 A CN 201010206838A CN 102281187 A CN102281187 A CN 102281187A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
- H04W8/08—Mobility data transfer
- H04W8/085—Mobility data transfer involving hierarchical organized mobility servers, e.g. hierarchical mobile IP [HMIP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/12—Access point controller devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/16—Interfaces between hierarchically similar devices
- H04W92/20—Interfaces between hierarchically similar devices between access points
Abstract
The invention provides a system and a method for realizing local exchange transmission and a base station. The method comprises the following steps that after a calling business is received, a BSC (base station controller) identifies whether a source BTS (base transceiver station) and a destination BTS of the calling business belong to a same local exchange group according to the link information saved in the local exchange group, if so, the BSC notifies the source BTS and the destination BTS to perform inter-group message forwarding; after the notification forwarded by the inter-group message is received, the source BTS and the destination BTS receive finish the forwarding of the message related to the calling business according to the preset data table, and the link information of the BTS accessing to a superior node and accessing to all of the lower nodes is saved in the data forwarding table. The system, the method and the base station disclosed by the invention fully utilize the characteristics of the IP OVER E1/T1 to realize a local exchange system under a set of E1/T1 accessing way, thus, the transmission cost is greatly saved and the voice quality is improved.
Description
Technical field
The present invention relates to field of telecommunications, specifically, relate in the field of telecommunications and to realize that the E1/T1 access base station carries out this locality and exchanges system for transmitting and method, base station.
Background technology
In traditional communication network, the transmission network major part is the E1/T1 cable.The E1/T1 cable can provide higher transmission quality, can guarantee stable propagation delay time and transmission shake.Commercial now BTS (Base Transceiver Station, base station) also supports E1/T1 ABIS/IUB mouth direct and BSC/RNC (Base Station Controller, base station controller; Radio Network Controller, radio network controller) connect, or interconnect by the mode of E1/T1 cascade.The BTS of new research and development is the all-IP framework, promptly uses the mode of IP OVERE1/T1.
Traditional E1/T1 ABIS/IUB mouth access way, all the mode that adopts time slot to exclusively enjoy between a plurality of BTS, it is the part time interval resource that each BTS of cascade uses the E1/T1 cable respectively, as shown in Figure 1, BTS A, BTS B, BTS C and BTS D are cascade base-station, first pair of E1/T1 cable of base station A directly is connected with BSC, and base station A, B, C and D use this part time interval resource and BSC communication to the E1/T1 cable respectively, do not have the link communication between the base station.
In traditional network, BSC need exchange the data forwarding of calling both sides to CN (Core Network, core net).Under cascade connected mode shown in Figure 1, each BTS is to use time slot and the BSC communication that exclusively enjoys, and does not have link between BTS, can't finish mutual exchanges data, just can't realize local function of exchange.How under this network environment, realize local function of exchange, just must change existing transmission switching method.
Summary of the invention
The technical problem to be solved in the present invention provides realization local exchange system for transmitting and the method under a kind of E1/T1 of being applied to cascade base-station environment, to save the transmission cost of ABIS mouth and A mouth, has reduced the voice transfer time delay.
In order to solve the problems of the technologies described above, the invention provides the local exchange of a kind of realization system for transmitting, comprise: the base station (BTS) of base station controller (BSC) and a plurality of support E1 or T1 access capability, a plurality of BTS under described BSC and this BSC belong to a local exchange group, wherein:
Described BSC is used to store the link information in the local exchange group; And after being used to receive call business, when the BTS under judging the calling and called terminal of described call business belonged to same local exchange group, message was transmitted in the BTS under the notice calling and called terminal organized;
Described BTS comprises:
First module, it is used at described BTS during as the source BTS of call business or purpose BTS, and message is transmitted the described packet forwarding module of notice back triggering in receiving organizing that described BSC sends;
Second module is used at described BTS when participating in the BTS of call business, triggers described packet forwarding module after receiving the call business message; And
Packet forwarding module is used for finishing the message forwarding relevant with described call business according to pre-configured data forwarding relation table, preserves the link information that this BTS leads to superior node and leads to all downstream sites in the described data forwarding relation table.
Further, said system also has following characteristics: the link information in the described data forwarding relation table comprises: the IP address of the superior node that links to each other with this BTS and all downstream sites, chain line and link direction information;
Described packet forwarding module comprises:
Matching unit, the IP address that is used for the downstream site of data forwarding relation table that the IP address, destination of message to be transmitted and this BTS are preserved is complementary, if occurrence is arranged, then triggers descending retransmission unit; If no occurrence then triggers the forwarded upstream unit;
Descending retransmission unit is used for finishing message on the represented link of described IP address link corresponding sign and transmits;
The forwarded upstream unit is used for message is sent to the superior node of described data forwarding relation table.
Further, said system also has following characteristics:
Described BSC, also be used to preserve the carrier frequency information of all BTS in the local exchange group, be the unique local exchange end slogan of each carrier frequency configuration of each BTS in the local exchange group in advance, perhaps in the process that message is transmitted in described source BTS and purpose BTS organize, be respectively source BTS and purpose BTS and dispose local exchange end slogan.
Further, said system also has following characteristics: described packet forwarding module also comprises:
The structure message unit, the purpose IP address that is used for message that will be to be transmitted changes the IP address of purpose BTS into, source user data pack protocol port numbers is changed into the local exchange end slogan of this BTS, change purpose User Datagram Protocol port numbers the local exchange end slogan of purpose BTS into, the message of having constructed is sent to described matching unit.
Further, said system also has following characteristics: a plurality of BTS under described BSC and this BSC belong to specifically being connected to of a local exchange group:
Described BSC links to each other with BTS at least one group, adopts the chrysanthemum chain to connect between the described BTS, and the direct and described BSC of higher level BTS is connected, and other BTS are continuous in twos; Between per two continuous BTS, and higher level BTS and BSC between set up point-to-point protocol link or Multi-Link Point-to-Point Protocol link in twos.
In order to solve the problems of the technologies described above, the present invention also provides a kind of base station, comprising:
First module is used at described base station (BTS) during as the source BTS of call business or purpose BTS, and message is transmitted notice back triggering packet forwarding module in receiving organizing that described BSC sends;
Second module is used at described BTS when participating in the BTS of call business, triggers packet forwarding module after receiving the call business message; And
Packet forwarding module is used for finishing the message forwarding relevant with described call business according to pre-configured data forwarding relation table, preserves the link information that this BTS leads to superior node and leads to all downstream sites in the described data forwarding relation table.
Further, above-mentioned base station also has following characteristics: the link information in the described data forwarding relation table comprises: the IP address of the superior node that links to each other with this BTS and all downstream sites, chain line and link direction information,
Described packet forwarding module comprises:
Matching unit, the IP address that is used for the downstream site of data forwarding relation table that the IP address, destination of message to be transmitted and this BTS are preserved is complementary, if occurrence is arranged, then triggers descending retransmission unit; If no occurrence then triggers the forwarded upstream unit;
Descending retransmission unit is used for finishing message on the represented link of described IP address link corresponding sign and transmits;
The forwarded upstream unit is used for message is sent to the superior node of described data forwarding relation table.
Further, above-mentioned base station also has following characteristics: described packet forwarding module also comprises:
The structure message unit, be connected with described matching unit, the purpose IP address that is used for message that will be to be transmitted changes the IP address of purpose BTS into, source user data pack protocol port numbers is changed into the local exchange end slogan of this BTS, change purpose User Datagram Protocol port numbers the local exchange end slogan of purpose BTS into, the message of having constructed is sent to described matching unit.
In order to address the above problem, the present invention also provides a kind of method that realizes local exchange transmission, comprising:
After base station controller (BSC) receives call business, belong to same local exchange group if judge the source base station (BTS) and the purpose BTS of described call business according to the link information in this locality exchange group of preserving, message was transmitted in then notification source BTS and purpose BTS organized;
After the notice that message was transmitted in described source BTS and purpose BTS received and organize, finish the message forwarding relevant according to pre-configured data forwarding relation table with described call business, or, described source BTS finishes the message forwarding relevant with described call business with interior other the relevant BTS of the collaborative local exchange group of purpose BTS according to pre-configured data forwarding relation table, preserves the link information that this BTS leads to superior node and leads to all downstream sites in the described data forwarding relation table.
Further, said method also has following characteristics:
Link information in the described data forwarding relation table comprises: the IP address of the superior node that links to each other with this BTS and all downstream sites, chain line and link direction information;
The step that described BTS finishes the message forwarding relevant with described call business according to pre-configured data forwarding relation table comprises:
(a) the IP address of the downstream site in the data forwarding relation table preserved of the IP address, destination of the message that present node will be to be transmitted and this BTS is complementary, if occurrence is arranged, if execution in step (b) then is no occurrence, then execution in step (c);
(b) finishing message on the represented link of described IP address link corresponding sign transmits;
(c) message is sent to superior node in the described data forwarding relation table, described superior node is received behind the message as present node, execution in step (a).
Further, said method also has following characteristics:
Described BSC preserves the carrier frequency information of all BTS in the local exchange group; Described BSC is the unique local exchange end slogan of each carrier frequency configuration of each BTS in the local exchange group in advance, perhaps in the process that message is transmitted in described source BTS and purpose BTS organize, be respectively source BTS and purpose BTS and dispose local exchange end slogan.
Further, said method also has following characteristics: described source BTS carries out in the process of the message forwarding relevant with described call business with purpose BTS:
Described source BTS will be to be transmitted the purpose IP address of message change the IP address of purpose BTS into, change source user data pack protocol port numbers the local exchange end slogan of this BTS into, purpose User Datagram Protocol port numbers is changed into the local exchange end slogan of purpose BTS;
When described purpose BTS sends message to described source BTS, the purpose IP address of message to be transmitted is changed into the IP address of source BTS, change source user data pack protocol port numbers the local exchange end slogan of this BTS into, purpose User Datagram Protocol port numbers is changed into the local exchange end slogan of source BTS.
To sum up, the invention provides a kind of realization local exchange system for transmitting and method, base station, under IPOVERE1/T1 ABIS/IUB access way, the preferred chrysanthemum chain that adopts connects between the base station, the local exchange transmission of the realization under this mode.The present invention makes full use of the characteristic of IP OVERE1/T1, has realized the local switching system under the cover E1/T1 access way, has saved transmission cost greatly, promotes speech quality, and this scheme realizes simple, and highly versatile can provide local flexibly exchange transmission.
Description of drawings
Fig. 1 is an E1 cascade base-station physical connection schematic diagram;
Fig. 2 is a schematic diagram of realizing local exchange system for transmitting of the present invention;
Fig. 3 is the schematic diagram of base station of the present invention;
Fig. 4 is a flow chart of realizing the method for local exchange transmission of the present invention;
Fig. 5 carries out the flow chart that message is transmitted for of the present invention according to the data forwarding relation table;
User's face message format that Fig. 6 adopts for the present invention;
Fig. 7 is for exchangeing subscriber the schematic diagram of face message between the base station of the present invention;
Fig. 8 is a schematic diagram of realizing local exchange system for transmitting application example of the present invention.
Embodiment
Local exchange refers to work as the calling and called both sides of calling all at same BSS (Base StationSubsystem, when base station sub-system) inner (the inner or same BTS inside of same BSC), speech data frame is only in the BSS inner exchanging, and need not exchange by CN, this mode is saved the transmission cost of ABIS mouth and A mouth greatly, has reduced the voice transfer time delay.
The local exchange of realization under E1/T1 of the present invention (referring to E1 or T1) cascade environment system for transmitting as shown in Figure 2, comprising: BSC and a plurality of BTS, wherein,
Dispose local exchange group on the BSC, a plurality of BTS under described BSC and this BSC belong to a local exchange group, store the carrier frequency information of link information and each BTS of all BTS in the local exchange group.
After BSC was used to receive call business, when the BTS under judging the calling and called terminal of described call business belonged to same local exchange group, message was transmitted in the BTS under the notice calling and called terminal organized; If judge when BTS under the calling and called terminal of described call business does not belong to same local exchange group, then still carry out the exchange of user's face message by core net, carry out business by original flow process.
In addition, it is the unique local exchange end slogan of each carrier frequency configuration of each BTS in the local exchange group in advance that BSC also is used for, and is used to identify carrier frequency.Particularly, BSC is each carrier frequency configuration UDP (User Datagram Protocol) port numbers of each BTS in the local exchange group, with the IP address of carrier frequency place BTS, BTS finishes user's face message forwarding according to the udp port number of configuration, IP address and the data forwarding relation table of carrier frequency place BTS; Perhaps in the BSC process that message is transmitted in described source BTS and purpose BTS organize, be respectively source BTS and purpose BTS and dispose local exchange end slogan.
The sign carrier frequency can also adopt other modes except the mode of the local exchange end slogan of above-mentioned configuration, for example, can use that other custom fields identify in the IP bag payload, or use the field identification in other transport layers and the application layer protocol.
BTS hardware supports E1/T1 access capability, and the extraction and the processing capacity of support E1/T1 time slot data; Can adopt the chrysanthemum chain to connect between BTS, higher level BTS directly is connected with BSC, and other BTS are continuous in twos, loop free; Between per two continuous BTS, and between higher level BTS and the BSC, set up PPP/ML-PPP link (point-to-point protocol link or Multi-Link Point-to-Point Protocol link) in twos.
Be provided with in advance on each BTS in the local exchange group and describe the data forwarding relation table that this BTS leads to superior node and leads to the link information of all downstream sites, all store the IP address information of BSC on each BTS, can finish the chain of command forwarding of data according to this data forwarding relation table and BSC foundation chain of command passage separately.
Each BTS comprises as shown in Figure 3: first module, second module and packet forwarding module, wherein,
First module is used at described BTS during as the source BTS of call business or purpose BTS, and message is transmitted notice back triggering packet forwarding module in receiving organizing that described BSC sends;
Second module is used at described BTS when participating in the BTS of call business, triggers described packet forwarding module after receiving the call business message;
Packet forwarding module is used for finishing the message relevant with described call business according to pre-configured data forwarding relation table and transmits, and preserves the link information that this BTS leads to superior node and leads to all downstream sites in the described data forwarding relation table.
Wherein, the link information in the data forwarding relation table comprises: the IP address of the superior node that links to each other with this BTS and all downstream sites, chain line and link direction information.
Packet forwarding module comprises: matching unit, descending retransmission unit and forwarded upstream unit, wherein,
Matching unit, the IP address that is used for the downstream site of data forwarding relation table that the IP address, destination of message to be transmitted and this BTS are preserved is complementary, if occurrence is arranged, then triggers descending retransmission unit; If no occurrence then triggers the forwarded upstream unit;
Descending retransmission unit is used for finishing message on the represented link of described IP address link corresponding sign and transmits;
The forwarded upstream unit is used for message is sent to the superior node of described data forwarding relation table.
Described packet forwarding module also comprises the structure message unit, as BTS during as source BTS and purpose BTS, the structure message unit is used for the purpose IP address of message to be transmitted is changed into the IP address of the BTS of destination, source user data pack protocol port numbers is changed into the local exchange end slogan of this BTS, purpose User Datagram Protocol port numbers is changed into the local exchange end slogan of the BTS of destination, the message that will construct sends to matching unit again.And message transmit by way of BTS only make forwarding behavior, reconstruct message more not.
Except adopting the connection of chrysanthemum chain, can also adopt other connected mode between BTS, only need do a little respective handling according to actual connection situation for the relation of the link between BTS.
The present invention also provides a kind of method that realizes local exchange transmission, and this method utilizes the local exchange of above-mentioned realization system for transmitting to realize, as shown in Figure 4, comprises following step:
After S10, BSC receive call business, judge according to the link information in this locality exchange group of preserving whether this call business meets local give-and-take conditions, whether the source BTS and the purpose BTS that promptly judge call business belong to same local exchange group, if not, then turn to step S20; If then turn to step S30;
S20, carry out the exchange of user's face message, carry out business by existing procedure by core net.
Message was transmitted in S30, BSC organized according to calling terminal both sides' the carrier frequency information BTS by signaling calling and called both sides, i.e. source BTS and purpose BTS.
After the notice that message was transmitted in S40, source BTS and purpose BTS received and organize, finish the message relevant according to pre-configured data forwarding relation table and transmit, preserve the link information that this BTS leads to superior node and leads to all downstream sites in the described data forwarding relation table with described call business.
Wherein, user's face message that source BTS and purpose BTS rebuild according to configuration, and finish user's face message forwarding according to data forwarding relation table and the local exchange end slogan of corresponding carrier frequency.
Particularly, the baseband board of source BTS rebuilds the user face data form, change source udp port number and purpose udp port number, interface board is finished the change of purpose IP, particularly, source BTS changes the purpose IP address of the message transmitted the IP address of purpose BTS into, number changes the source udp port into source carrier frequency local exchange end slogan, and number change the purpose udp port into purpose carrier frequency local exchange end slogan, user face data directly can be sent to the other side BTS then.Equally, the message that purpose BTS also as above treats forwarding rebuilds, and issues the other side then.
Wherein, the link information in the data forwarding relation table comprises: the IP address of the superior node that links to each other with this BTS and all downstream sites, chain line and link direction information.Step S40 specifically can also comprise step as shown in Figure 5:
The IP address of IP address, destination of message that S401, present node will be to be transmitted and the downstream site in the data forwarding relation table preserved of this BTS is complementary, if occurrence is arranged, if execution in step S403 then is no occurrence, then execution in step S402;
S402, message is sent to superior node in the described data forwarding relation table, described superior node is received behind the message as present node, execution in step S401;
S403, on the represented link of described IP address link corresponding sign, finish message and transmit.
MPC8360E processor with FREESCALE company is that example describes below, also can adopt the mode of other hardware chip combinations to realize.
The BTS of present embodiment adopts interface board and the combined framework of baseband board, and interface board is responsible for the processing of BTS external interface, as E1/T1, Ethernet etc., finishes the inside and outside message and transmits processing; LTE Baseband Processing Unit is responsible for concrete professional processing, adopts the IP communication between interface board and the baseband board.
Interface board is handled the MPC8360E that core adopts FREESCALE, this processor adopting has the e500 kernel of high handling property, and employing QE (QUICC Engine) protocol processes technology, QE is by two 32-bit RISC (Reduced Instruction Set Computer, reduced instruction set computer) forms, finish the data processing of each I/O interface.
LTE Baseband Processing Unit for the processing rule of user's face message is: if current business is the non-local reciprocal exchange of business, the destination of packet is BSC; If the local reciprocal exchange of business, the destination is the base station at target carrier frequency place.
Present embodiment adopts message structure as shown in Figure 6 to carry out the transmission of user's face message, and promptly transport layer adopts udp protocol, uses different udp ports number corresponding different respectively carrier frequency.
Fig. 7 has described exchanges subscriber the schematic diagram of face message between base station B and the base station D, as shown in the figure, BTS is inner to use inner IP addressing, and BTS is outside to use outside IP addressing, finishes the inside and outside message forwarding by interface board.
As BTS B, BTS D during as the source and destination base station, after the notice of carrying out the message forwarding that receives BSC, the source udp port number is changed into the local exchange end slogan of this BTS as the LTE Baseband Processing Unit of source BTS B, the purpose udp port number is changed into the local exchange end slogan of purpose BTS, interface board will be to be transmitted the purpose IP (being the inside IP of interface board) of message change external IP (that is the IP of purpose BTS) into; As purpose BTS when described source BTS sends message, in like manner, the Base-Band Processing of purpose BTS number changes the source udp port into the local exchange end slogan of this BTS, the purpose udp port number is changed into the local exchange end slogan of source BTS, the interface board plate will be to be transmitted the purpose IP address (being the inside IP of interface board) of message change external IP into (promptly, the IP of source BTS), then, carry out message forwarding according to the data forwarding relation again.
Under the situation of E1/T1 chrysanthemum chain cascade network, having only higher level's BTS is directly to link to each other with BSC, all the other BTS link to each other in twos, set up PPP/ML-PPP (Multilink Point-to-Point Protocol, Multi-Link Point-to-Point Protocol) link separately in twos between the equipment.
As shown in Figure 2, adopt the chrysanthemum chain to connect between the BTS, BTS A and BSC, BTS B and BTS A, BTS C and BTS A and BTS D and BTS C set up the PPP/ML-PPP link in twos between the equipment.For example, the chain of command link between BTS B and the BSC must be transmitted by its higher level BTS A; User face data between BTS B and the BTS D must be transmitted by BTS A and BTS C.
Use at BTS under the environment of E1/T1 chrysanthemum chain cascade network, if want to allow BTS can be operated in the pattern of local exchange, each BTS must dispose the data forwarding relation of E1/T1 port, and promptly the message of the BTS of subordinate need pass through the information of which bar link forwarding of higher level BTS.Indicated the IP address of correspondence of every PPP/ML-PPP both link ends and the sign of every link that BTS is had among Fig. 2, as the IP address of the link 1 two ends correspondence of BTS B be: 118.1.2.1 and 118.1.2.2.
According to structure shown in Figure 2, the data forwarding relation table of the BTS A that need dispose is as shown in table 1, and " chain line " field is the numbering of the link that this BTS had, corresponding PPP/ML-PPP link; " IP of connected node " field is the BTS of all connections below this link or the IP address of BSC; " link direction " field be this link to extreme direction, " up " is towards superior node, " descending " is towards downstream site.The data forwarding relation table of the BTS B that need dispose is as shown in table 2; The data forwarding relation table of the BTS C that need dispose is as shown in table 3; The data forwarding relation table of the BTS D that need dispose is as shown in table 4.
Table 1
Table 2
| The chain line | Connected node IP | Link direction |
| 1 | 118.1.2.2 | Up |
Table 3
| The chain line | Connected node IP | Link direction |
| 1 | 118.1.3.2 | Up |
| 2 | 118.1.4.1 | Descending |
Table 4
| The chain line | Connected node IP | Link direction |
| 1 | 118.1.4.2 | Up |
After above configuration data has been arranged, after each BTS powers on, can set up separately chain of command passage with BSC.With BTS D is example, and the link building messages that is sent to the destination and is BSC (IP:118.1.1.2) sends by link 1; After BTS C receives, question blank 3, learning needs to transmit by link 1; After BTS A receives, question blank 1, learning needs to transmit by link 1, and so far the message of BSC D arrives BSC.The message of BSC loopback (destination IP:118.1.4.1) arrives BTS A earlier, BTS A question blank 1, and learning needs to transmit by link 3; After BTS C receives, question blank 3, learning needs to transmit arrival BTS D by link 2, so just finishes the transmission of chain of command link between BTS D and the BSC.
After the chain of command of BTS was transmitted relation foundation, each BTS just can set up the chain of command passage with BSC.BSC can take mode configuration call terminal both sides' the source BTS of static configuration or dynamic-configuration and the IP address of purpose BTS, the local exchange end slogan of source carrier frequency and purpose carrier frequency (being UDP (User Datagram Protoco (UDP)) port numbers).
Static configuration is the BTS initial operating stage, BSC is the local exchange end slogan of each carrier frequency configuration of each BTS in the local exchange group, guarantee the uniqueness of the local exchange end slogan of all carrier frequency in a local exchange group by BSC, under the situation that the BTS configuration does not have to change, corresponding relation is constant.Need to dispose the corresponding relation of local exchange end slogan of carrier frequency and carrier frequency place base station IP simultaneously.
When the dynamic-configuration business of being was carried out, BSC was at the IP address by means of signaling notification source BTS and purpose BTS calling and called both sides place BTS and udp port number.BSC adopts the dynamic-configuration mode can set up or delete the user face data transformational relation in real time, can save system resources such as udp port number and internal memory.
Be that example describes below with the static configuration, BTS receives and is similar to configuration as shown in table 5 that the BTS binding data is transmitted the forwarding that relation table is finished user face data.
When BTS transmits user's face message, need search in " descending " field in being similar to the data forwarding relation table shown in the table 1, each BTS might have a plurality of BTS of subordinate, but has and only have a higher level equipment.The data forwarding relation table of each BTS disposes the information of its immediate superior base station IP and all base station IP of its subordinate, when BTS transmits user's face message, with to be sent/IP address, destination that E-Packets and " descending " fields match of data forwarding relation table, if occurrence is arranged, then on " chain line " link corresponding, transmit; Otherwise, then data are mail to " up " link.
Existing as shown in Figure 2 topological structure of hypothesis, the carrier frequency 1 of supposing to have in the local exchange group two carrier frequency BTS B carries out CS (Circuit Switched Domain, circuit commutative field) business with two users on the carrier frequency 2 of BTS D.Summary is now carried out the process of setting up that user face data sends needed carrying for TRX1 with TRX2.
BTS B can receive that this locality as shown in table 5 that is similar to that BSC issues exchanges configuration information:
Table 5
| This BTS | Carrier frequency 1 | Local exchange end slogan N |
| Other BTS | IP：118.1.4.1 | Local exchange end slogan M |
Can receive on the BTS D and be similar to exchange configuration information in this locality as shown in table 6:
Table 6
| Other BTS | IP：118.1.2.1 | Local exchange end slogan N |
| This BTS | Carrier frequency 2 | Local exchange end slogan M |
With the direction from base station D to base station B is example, in the other direction in like manner.BTS D searches for the item that destination IP is 118.1.2.1 in the configuration of " descending " field correspondence of the data forwarding relation table shown in the table 4, no occurrence then uses " chain line " 1 link corresponding of its " up " field correspondence to send.
After BTS C received this message, searching destination IP in " descending " field of the data forwarding relation table shown in the table 3 was the item of 118.1.2.1, and no occurrence then uses " chain line " 1 link corresponding of its " up " field correspondence to send.
After BTS A received this message, searching destination IP in " descending " field of the data forwarding relation table shown in the table 1 was the item of 118.1.2.1, and the match is successful, so send on link 2.
After BTS B receives this message, find that destination IP be this base station,, data are mail to the carrier frequency of correspondence then according to purpose udp port number.
By above-mentioned flow process, the chain of command passage between BTS and the BSC is normally set up, and normally sets up from user's face passage of BTS B carrier frequency 1 to BTS D carrier frequency 2, thereby has realized local function of exchange under the E1/T1 network environment.
Only provide a BTS among Fig. 2 and be connected, in realizing application, can have a plurality of BTS directly to be connected, as shown in Figure 8 with BSC with BSC.In scene shown in Figure 8, the BTS under the BSC can form a plurality of chrysanthemum chain links as shown in Figure 2.
Suppose, needing to carry out message between BTS D and the BTS B ' transmits, with the direction from BTS D to BTS B ' is that example describes, the IP that supposes BTS B ' is 118.1.8.1, as indicated above, message passes through BTS C to BTS A from BTS D, after BTS A receives this message, not searching destination IP in " descending " field of the data forwarding relation table shown in the table 1 is the item of 118.1.8.1, no occurrence, then use " chain line " 1 link corresponding of its " up " field correspondence to send, message is sent to BSC.
Owing to preserve the link information of all BTS on the BSC, thus BSC can inquire destination IP be 118.1.8.1 on any bar link, after BSC receives this message, message is sent to BTS A '.
In like manner, after BTS A ' received this message, searching destination IP in " descending " field of its data forwarding relation table was the item of 118.1.8.1, and the match is successful, then message sent to BTS B '.
One of ordinary skill in the art will appreciate that all or part of step in the said method can instruct related hardware to finish by program, described program can be stored in the computer-readable recording medium, as read-only memory, disk or CD etc.Alternatively, all or part of step of the foregoing description also can use one or more integrated circuits to realize.Correspondingly, each the module/unit in the foregoing description can adopt the form of hardware to realize, also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
Below only be the preferred embodiments of the present invention; certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (12)
1. realize local exchange system for transmitting for one kind, comprising: the base station (BTS) of base station controller (BSC) and a plurality of support E1 or T1 access capability, a plurality of BTS under described BSC and this BSC belong to a local exchange group, wherein:
Described BSC is used to store the link information in the local exchange group; And after being used to receive call business, when the BTS under judging the calling and called terminal of described call business belonged to same local exchange group, message was transmitted in the BTS under the notice calling and called terminal organized;
Described BTS comprises:
First module, it is used at described BTS during as the source BTS of call business or purpose BTS, and message is transmitted the described packet forwarding module of notice back triggering in receiving organizing that described BSC sends;
Second module is used at described BTS when participating in the BTS of call business, triggers described packet forwarding module after receiving the call business message; And
Packet forwarding module is used for finishing the message forwarding relevant with described call business according to pre-configured data forwarding relation table, preserves the link information that this BTS leads to superior node and leads to all downstream sites in the described data forwarding relation table.
2. the system as claimed in claim 1, it is characterized in that: the link information in the described data forwarding relation table comprises: the IP address of the superior node that links to each other with this BTS and all downstream sites, chain line and link direction information;
Described packet forwarding module comprises:
Matching unit, the IP address that is used for the downstream site of data forwarding relation table that the IP address, destination of message to be transmitted and this BTS are preserved is complementary, if occurrence is arranged, then triggers descending retransmission unit; If no occurrence then triggers the forwarded upstream unit;
Descending retransmission unit is used for finishing message on the represented link of described IP address link corresponding sign and transmits;
The forwarded upstream unit is used for message is sent to the superior node of described data forwarding relation table.
3. system as claimed in claim 2 is characterized in that:
Described BSC, also be used to preserve the carrier frequency information of all BTS in the local exchange group, be the unique local exchange end slogan of each carrier frequency configuration of each BTS in the local exchange group in advance, perhaps in the process that message is transmitted in described source BTS and purpose BTS organize, be respectively source BTS and purpose BTS and dispose local exchange end slogan.
4. system as claimed in claim 3 is characterized in that: described packet forwarding module also comprises:
The structure message unit, the purpose IP address that is used for message that will be to be transmitted changes the IP address of purpose BTS into, source user data pack protocol port numbers is changed into the local exchange end slogan of this BTS, change purpose User Datagram Protocol port numbers the local exchange end slogan of purpose BTS into, the message of having constructed is sent to described matching unit.
5. the system as claimed in claim 1 is characterized in that: a plurality of BTS under described BSC and this BSC belong to specifically being connected to of a local exchange group:
Described BSC links to each other with BTS at least one group, adopts the chrysanthemum chain to connect between the described BTS, and the direct and described BSC of higher level BTS is connected, and other BTS are continuous in twos; Between per two continuous BTS, and higher level BTS and BSC between set up point-to-point protocol link or Multi-Link Point-to-Point Protocol link in twos.
6. a base station is characterized in that, comprising:
First module is used at described base station (BTS) during as the source BTS of call business or purpose BTS, and message is transmitted notice back triggering packet forwarding module in receiving organizing that described BSC sends;
Second module is used at described BTS when participating in the BTS of call business, triggers packet forwarding module after receiving the call business message; And
Packet forwarding module is used for finishing the message forwarding relevant with described call business according to pre-configured data forwarding relation table, preserves the link information that this BTS leads to superior node and leads to all downstream sites in the described data forwarding relation table.
7. base station as claimed in claim 6 is characterized in that, the link information in the described data forwarding relation table comprises: the IP address of the superior node that links to each other with this BTS and all downstream sites, chain line and link direction information,
Described packet forwarding module comprises:
Matching unit, the IP address that is used for the downstream site of data forwarding relation table that the IP address, destination of message to be transmitted and this BTS are preserved is complementary, if occurrence is arranged, then triggers descending retransmission unit; If no occurrence then triggers the forwarded upstream unit;
Descending retransmission unit is used for finishing message on the represented link of described IP address link corresponding sign and transmits;
The forwarded upstream unit is used for message is sent to the superior node of described data forwarding relation table.
8. base station as claimed in claim 7 is characterized in that, described packet forwarding module also comprises:
The structure message unit, be connected with described matching unit, the purpose IP address that is used for message that will be to be transmitted changes the IP address of purpose BTS into, source user data pack protocol port numbers is changed into the local exchange end slogan of this BTS, change purpose User Datagram Protocol port numbers the local exchange end slogan of purpose BTS into, the message of having constructed is sent to described matching unit.
9. realize the local method that exchanges transmission for one kind, comprising:
After base station controller (BSC) receives call business, belong to same local exchange group if judge the source base station (BTS) and the purpose BTS of described call business according to the link information in this locality exchange group of preserving, message was transmitted in then notification source BTS and purpose BTS organized;
After the notice that message was transmitted in described source BTS and purpose BTS received and organize, finish the message forwarding relevant according to pre-configured data forwarding relation table with described call business, or, described source BTS finishes the message forwarding relevant with described call business with interior other the relevant BTS of the collaborative local exchange group of purpose BTS according to pre-configured data forwarding relation table, preserves the link information that this BTS leads to superior node and leads to all downstream sites in the described data forwarding relation table.
10. method as claimed in claim 9 is characterized in that:
Link information in the described data forwarding relation table comprises: the IP address of the superior node that links to each other with this BTS and all downstream sites, chain line and link direction information;
The step that described BTS finishes the message forwarding relevant with described call business according to pre-configured data forwarding relation table comprises:
(a) the IP address of the downstream site in the data forwarding relation table preserved of the IP address, destination of the message that present node will be to be transmitted and this BTS is complementary, if occurrence is arranged, if execution in step (b) then is no occurrence, then execution in step (c);
(b) finishing message on the represented link of described IP address link corresponding sign transmits;
(c) message is sent to superior node in the described data forwarding relation table, described superior node is received behind the message as present node, execution in step (a).
11., it is characterized in that as claim 9 or 10 described methods:
Described BSC preserves the carrier frequency information of all BTS in the local exchange group; Described BSC is the unique local exchange end slogan of each carrier frequency configuration of each BTS in the local exchange group in advance, perhaps in the process that message is transmitted in described source BTS and purpose BTS organize, be respectively source BTS and purpose BTS and dispose local exchange end slogan.
12. method as claimed in claim 11 is characterized in that: described source BTS carries out in the process of the message forwarding relevant with described call business with purpose BTS:
Described source BTS will be to be transmitted the purpose IP address of message change the IP address of purpose BTS into, change source user data pack protocol port numbers the local exchange end slogan of this BTS into, purpose User Datagram Protocol port numbers is changed into the local exchange end slogan of purpose BTS;
When described purpose BTS sends message to described source BTS, the purpose IP address of message to be transmitted is changed into the IP address of source BTS, change source user data pack protocol port numbers the local exchange end slogan of this BTS into, purpose User Datagram Protocol port numbers is changed into the local exchange end slogan of source BTS.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102068388A CN102281187A (en) | 2010-06-11 | 2010-06-11 | System and method for realizing local exchange transmission and base station |
| PCT/CN2011/072874 WO2011153870A1 (en) | 2010-06-11 | 2011-04-15 | System, method and base station for implementing local switching transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010102068388A CN102281187A (en) | 2010-06-11 | 2010-06-11 | System and method for realizing local exchange transmission and base station |
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| CN2010102068388A Pending CN102281187A (en) | 2010-06-11 | 2010-06-11 | System and method for realizing local exchange transmission and base station |
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| WO (1) | WO2011153870A1 (en) |
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| WO2011153870A1 (en) | 2011-12-15 |
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