CN102487539A - Switching method, device and system of single-frequency wireless access network - Google Patents
Switching method, device and system of single-frequency wireless access network Download PDFInfo
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Abstract
The embodiment of the invention discloses a switching method, a device and a system of a single-frequency wireless access network. The method is implemented as follows: a network controller receives switching decision relevant information sent by a base station under the network controller; the network controller determines the motion direction of terminal equipment according to the switching decision relevant information and determines a target base station for terminal switching according to the motion direction of the terminal equipment, wherein the target base station is a base station to which the terminal equipment is to be switched; and the network controller sends switching information to the target base station, wherein the switch information is used for indicating that the terminal equipment is switched into and assigning a time slot used for the communication between the terminal equipment and the target base station. By utilizing the switching method disclosed by the embodiment of the invention, certain control traffic channels can be effectively reduced; the network expenditure is saved; the ping-pong switching problem under a terminal equipment trigger mode can be effectively relieved; the switching reliability is ensured; and the real-time capability of acquiring the monitoring data by a control center is effectively ensured.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of changing method of single-frequency wireless access network, device and system.
Background technology
Single-frequency wireless access network (abbreviation SFN) is meant that the same time of several transmitting stations (base station) launches wireless signal on same frequency, to realize the reliable covering to certain coverage.Compared to traditional multiple frequency network, MFN (Multiple Frequency Network; MFN); Because SFN does not need channeling in the overlay area, the wireless signal in service area can take the communication bandwidth of system complete, therefore can improve the spectrum efficiency of wireless network significantly.Occupy the difference of the network bandwidth according to the up-downgoing data, lay the ground digital television broadcast service that SFN can be used for the leading network bandwidth of downlink data, also can be used for a plurality of regional wireless video monitoring service of the leading network bandwidth of upstream data.
Switching is to communicate by letter from transfer to the process of another Radio Link when previous Radio Link, is the important step that guarantees the communication of mobile terminal quality.Character according to switching generally can be divided into soft handover and direct-cut operation with switching.Wherein, after soft handover requirement terminal and Target cell are set up and be connected, be connected with the cell-of-origin disconnection again; The disconnection earlier of direct-cut operation requirement terminal is connected with the cell-of-origin, connects with Target cell then.The single-frequency Radio Access Network can adopt that (Time Reuse, (handoff procedure can adopt hard-switching technology to time division multiple access TR) for Time Division Multiple Access, radio switch-in method TDMA) based on time division multiplexing.
Now general direct-cut operation is handled main the employing based on the hard-switching technology of measuring; Its basic principle is following: when the terminal from a sub-district when move another sub-district; Interruption is measured the signal of adjacent sub-district; Belong to the radio network controller in sub-district to reporting measuring result to it then, determine whether switching by radio network controller, and how to switch.Three major function entities according to the wireless access purposes in the SFN; The equipment of the general direct-cut operation decision-making of adopting is mainly wireless terminal device, and terminal equipment obtains the downlink pilot support that the adjacent cell radio link quality information needs some.In the single-frequency Radio Access Network of time division multiple access, can achieve the above object through allocation of downlink, but meanwhile can lose the resource of up link.
Summary of the invention
The technical problem that the embodiment of the invention will solve provides a kind of changing method, device and system of single-frequency wireless access network.
For solving the problems of the technologies described above, the changing method embodiment of single-frequency wireless access network provided by the present invention can realize through following technical scheme:
Network controller receives the handover decisions relevant information that send the base station under the network controller;
Network controller is confirmed the direction of motion of terminal equipment according to said handover decisions relevant information; And confirm the target BS that switch at said terminal according to the direction of motion of said terminal equipment, said target BS is the base station that said terminal equipment will be cut;
Network controller sends handover information to target BS; The indication of said handover information has the terminal equipment incision, and the time slot of the use of communicate by letter between designated terminal equipment and target BS.
A kind of changing method of single-frequency wireless access network comprises:
The data message that receiving terminal apparatus sends;
Reception situation according to said data message is confirmed the handover decisions relevant information, and said decision information is sent to network controller;
Receive the handover information that network controller sends; Said handover information indication has the terminal equipment incision, and the time slot of designated terminal equipment and the use of this inter base station communication;
Channel allocation information after said base station will be switched through time slot sends to the terminal equipment of said incision; Channel allocation information after the said switching is specified the time slot that switches back terminal equipment and inter base station communication use.
A kind of changing method of single-frequency wireless access network comprises:
Send data message to the base station;
The time slot that terminal equipment and inter base station communication used after channel allocation information after receiving the switching of sending the base station on the time slot, the channel allocation information after the said switching were specified and switched;
Send data message on the time slot after said appointment is switched.
A kind of network controller comprises:
The base station information receiving element is used to receive the handover decisions relevant information that send the base station under the network controller;
First decision package is used for the direction of motion that the said handover decisions relevant information of foundation is confirmed terminal equipment; And confirm the target BS that switch at said terminal according to the direction of motion of said terminal equipment, said target BS is the base station that said terminal equipment will be cut;
The handover information transmitting element is used for sending handover information to target BS; The indication of said handover information has the terminal equipment incision, and the time slot of the use of communicate by letter between designated terminal equipment and target BS.
A kind of base station comprises:
The data message receiving element is used for the data message that receiving terminal apparatus sends;
Data message is confirmed the unit, is used for confirming the handover decisions relevant information according to the reception situation of said data message, and said decision information is sent to network controller;
The handover information receiving element is used to receive the handover information that network controller sends; Said handover information indication has the terminal equipment incision, and the time slot of designated terminal equipment and the use of this inter base station communication;
Radio unit, the channel allocation information after being used for will switching through time slot sends to the terminal equipment of said incision; Channel allocation information after the said switching is specified the time slot that switches back terminal equipment and inter base station communication use.
A kind of terminal comprises:
The data message transmitting element is used for sending data message to the base station; On the time slot of specifying after switching, send data message;
Information receiving unit is used for the channel allocation information after receiving the switching of sending the base station on the time slot, the time slot that terminal equipment and inter base station communication used after the channel allocation information after the said switching was specified and switched.
A kind of single-frequency wireless access network comprises: network controller and base station,
Network controller is the network controller that the embodiment of the invention provides, and the base station is the base station that the embodiment of the invention provides.
Technique scheme has following beneficial effect: the changing method of the embodiment of the invention need not terminal equipment and reports the radio link quality test report, has reduced some control Traffic Channels effectively, saves network overhead.Adopt base station end to trigger the mode of direct-cut operation decision-making, can effectively alleviate the table tennis switching problem under the terminal equipment triggering mode, guarantee the reliability of switching.Need not the base station based on the method for hard switching of source base station decision-making and converge the decoding data of all time slots, guaranteed that effectively the charge center obtains the real-time of monitor data to the charge center.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the invention; The accompanying drawing of required use is done to introduce simply in will describing embodiment below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is an embodiment of the invention method flow sketch map;
Fig. 2 is an embodiment of the invention method flow sketch map;
Fig. 3 is an embodiment of the invention method flow sketch map;
Fig. 4 is an embodiment of the invention method flow sketch map;
Fig. 5 is an embodiment of the invention SFN structural representation;
Fig. 6 is an embodiment of the invention SFN structural representation;
Fig. 7 is an embodiment of the invention network controller structural representation;
Fig. 8 is an embodiment of the invention network controller structural representation;
Fig. 9 is an embodiment of the invention architecture of base station sketch map;
Figure 10 is an embodiment of the invention architecture of base station sketch map;
Figure 11 is an embodiment of the invention architecture of base station sketch map;
Figure 12 is an embodiment of the invention terminal structure sketch map;
Figure 13 is an embodiment of the invention terminal structure sketch map;
Figure 14 is the system configuration sketch map of embodiment of the invention single-frequency wireless access network.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
A kind of changing method of single-frequency wireless access network, as shown in Figure 1, comprising:
101: network controller receives the handover decisions relevant information that send the base station under the network controller;
Above-mentioned decision-making relevant information can be any information that is used for confirming the terminal moving direction; Such as the wireless channel link quality information; Can be the signal to noise ratio that the base station receiving terminal apparatus sends data message more specifically, in the subsequent implementation example, will describe as example.It is understandable that signal to noise ratio is not that unique definite terminal equipment direction of motion neither confirm that terminal equipment carries out the sole mode of the switching of Radio Link, this should not be construed as the qualification to the embodiment of the invention for example.
Base station under the above-mentioned network controller comprises the base station at the current place of terminal equipment and the target BS of incision at least.
102: network controller is confirmed the direction of motion of terminal equipment according to above-mentioned handover decisions relevant information; And confirm the target BS that switch at above-mentioned terminal according to the direction of motion of above-mentioned terminal equipment, above-mentioned target BS is the base station that above-mentioned terminal equipment will be cut;
103: network controller sends handover information to target BS; The indication of above-mentioned handover information has the terminal equipment incision, and the time slot of the use of communicate by letter between designated terminal equipment and target BS.
In above-mentioned 103, the time slot that uses of communicating by letter between terminal equipment and target BS is: the current time slots of target BS; Perhaps; Between designated terminal equipment and target BS, communicate by letter the time slot that uses as current time slots before; Whether the current time slots of judging above-mentioned target BS is occupied; If take, the idle time slot of then confirming above-mentioned target BS adjacent base station be terminal equipment with target BS between the communicate by letter time slot of use.
Further, the embodiment of the invention gives the implementation that terminal equipment inserts, and also comprises before the handover decisions relevant information that send above-mentioned reception base station:
Receive the measurement report that send the base station, carry the signal to noise ratio of sending signal between above-mentioned base station and terminal equipment; Confirm that according to measurement report the maximum base station of signal to noise ratio is a source base station;
The access information that network controller sends to source base station, above-mentioned access information indication has terminal equipment to insert.
The changing method of the embodiment of the invention need not terminal equipment and reports the radio link quality test report, has reduced some control Traffic Channels effectively, saves network overhead.Adopt base station end to trigger the mode of direct-cut operation decision-making, can effectively alleviate the table tennis switching problem under the terminal equipment triggering mode, guarantee the reliability of switching.Need not the base station based on the method for hard switching of source base station decision-making and converge the decoding data of all time slots, guaranteed that effectively the charge center obtains the real-time of monitor data to the charge center.
The embodiment of the invention also provides the changing method of another kind of single-frequency wireless access network, and this method executive agent is the base station, and is as shown in Figure 2, comprising:
201: the data message that receiving terminal apparatus sends;
202: the reception situation according to above-mentioned data message is confirmed the handover decisions relevant information, and above-mentioned decision information is sent to network controller;
Above-mentioned decision-making relevant information can be any information that is used for confirming the terminal moving direction; Such as the wireless channel link quality information; Can be the signal to noise ratio that the base station receiving terminal apparatus sends data message more specifically, in the subsequent implementation example, will describe as example.It is understandable that signal to noise ratio is not that unique definite terminal equipment direction of motion neither confirm that terminal equipment carries out the sole mode of the switching of Radio Link, this should not be construed as the qualification to the embodiment of the invention for example.
203: receive the handover information that network controller sends; Above-mentioned handover information indication has the terminal equipment incision, and the time slot of designated terminal equipment and the use of this inter base station communication;
The embodiment of the invention can adopt the mode of direct-cut operation to carry out; Also comprise before the handover information that then above-mentioned reception network controller sends: confirm according to above-mentioned handover decisions relevant information whether above-mentioned terminal equipment switches; If then discharge the time interval resource that above-mentioned terminal equipment takies.
Need to prove that the embodiment of the invention adopts the mode of soft handover can realize that also direct-cut operation should not be construed as the qualification to the embodiment of the invention.
204: the channel allocation information after above-mentioned base station will be switched through time slot sends to the terminal equipment of above-mentioned incision; Channel allocation information after the above-mentioned switching is specified the time slot that switches back terminal equipment and inter base station communication use.
Particularly, data message adopts the error checking and correction technology for encoding in above-mentioned 201;
Confirm that according to the reception situation of data message the handover decisions relevant information comprises in above-mentioned 202:
Above-mentioned data message is deciphered, obtained the error rate;
Confirming according to above-mentioned handover decisions relevant information whether above-mentioned terminal equipment switches in 203 comprises:
, the error rate confirms that above-mentioned terminal equipment switches when reaching predetermined value.
The method that the embodiment of the invention also provides terminal equipment to insert also comprises before the data message that receiving terminal apparatus sends in 201:
The access request that receiving terminal sends;
Reception situation according to inserting request is measured, and measurement report is sent to network controller;
Receive the access information that network controller sends, above-mentioned access information indication has terminal equipment to insert;
Above-mentioned base station sends to the channel allocation information that inserts through time slot the terminal equipment of above-mentioned access; The channel allocation information of above-mentioned access is specified the time slot that inserts back terminal equipment and inter base station communication use.
The changing method of the embodiment of the invention need not terminal equipment and reports the radio link quality test report, has reduced some control Traffic Channels effectively, saves network overhead.Adopt base station end to trigger the mode of direct-cut operation decision-making, can effectively alleviate the table tennis switching problem under the terminal equipment triggering mode, guarantee the reliability of switching.Need not the base station based on the method for hard switching of source base station decision-making and converge the decoding data of all time slots, guaranteed that effectively the charge center obtains the real-time of monitor data to the charge center.
The embodiment of the invention also provides the changing method of another single-frequency wireless access network, and the method executive agent is the terminal, and is as shown in Figure 3, comprising:
301: send data message to the base station;
302: the time slot that terminal equipment and inter base station communication used after the channel allocation information after receiving the switching of sending the base station on the time slot, the channel allocation information after the above-mentioned switching were specified and switched;
303: send data message on the time slot after above-mentioned appointment is switched.
The method that the embodiment of the invention also provides terminal equipment to insert, above-mentioned 301 also comprised before data message is sent in the base station:
Send the request of access to the base station;
On time slot, receive the base station and send the channel allocation information that inserts, the time slot that the channel allocation information of above-mentioned access specifies access back terminal equipment and inter base station communication to use;
On the time slot of the access of above-mentioned appointment, send data message.
The changing method of the embodiment of the invention need not terminal equipment and reports the radio link quality test report, has reduced some control Traffic Channels effectively, saves network overhead.Adopt base station end to trigger the mode of direct-cut operation decision-making, can effectively alleviate the table tennis switching problem under the terminal equipment triggering mode, guarantee the reliability of switching.Need not the base station based on the method for hard switching of source base station decision-making and converge the decoding data of all time slots, guaranteed that effectively the charge center obtains the real-time of monitor data to the charge center.
The method for hard switching of the SFN of a kind of wireless access purposes provided by the invention, as shown in Figure 4, this method implementation procedure relates to three functional entitys: network controller, base station, terminal equipment.Comprise following steps:
401: terminal equipment sends the request of access through access slot and gives the base station;
Here receiving and will having a base station in the base station of terminal equipment information is its base station that will insert, and we can be referred to as source base station, and the request of access also can be received in the contiguous base station (can be called the adjacent source base station) of source base station;
402: after source base station and adjacent source base station receive the request of inserting, the information of the signal energy of the above-mentioned access request of each self-metering reception is sent to network controller;
403: it is source base station that the network control center distributes optimum base station according to energy information; If the time slot of optimum base station is occupied, then call step-length and be the idle time interval resource of one adjacent source base station; Specify and inform the time slot of the above-mentioned terminal equipment access of source base station source base station; If the adjacent source base station has idle time interval resource then to refuse to insert;
404: source base station inserts the time slot of source base station through time slot notice terminal equipment;
405: terminal equipment is given source base station in the slot transmission data of appointment; So far, the process of terminal equipment access finishes.
406: the data that the source base station receiving terminal apparatus sends; Decipher then, and the result that will decipher sends to network controller; Catch or decoding failure if signal loses, can confirm that then terminal equipment need switch, at this moment can discharge the time interval resource that terminal equipment takies, inform network controller in addition, this time slot is idle;
407: network controller is collected the information in these free time time slot reception data of the neighbor base station of above-mentioned idle time slot, and the information that receives data can be the value of signal to noise ratio;
408: network controller is judged the moving direction of terminal equipment according to the value of signal to noise ratio;
409: network controller is confirmed target BS according to the direction that moves; If the time slot of target BS takies, then call step-length and be one the idle time interval resource of adjacent objects base station; Specify and inform the time slot of the above-mentioned terminal equipment access of target BS target BS; If the time interval resource of approaching target base station is all occupied, then can refuse to switch;
Can safeguard on the network controller that a table stores the Time Slot Occupancy situation of the base station of its administration, can upgrade according to the Time Slot Occupancy situation his-and-hers watches that base station in 406 reports.
410: the time slot after target BS switches through time slot notice terminal equipment;
411: the time slot transmitting data of terminal equipment after switching given target BS.
The changing method of the embodiment of the invention need not terminal equipment and reports the radio link quality test report, has reduced some control Traffic Channels effectively, saves network overhead.Adopt base station end to trigger the mode of direct-cut operation decision-making, can effectively alleviate the table tennis switching problem under the conventional terminal device fires mode, guarantee the reliability of switching.Need not the base station based on the method for hard switching of source base station decision-making and converge the decoding data of all time slots, guaranteed that effectively the charge center obtains the real-time of monitor data to the charge center.
Putting up with the instance of two SFNs below explains changing method more specifically; As shown in Figure 5; A hexagon is represented a sub-district; The communication of a sub-district is responsible in a base station, and the marking-up mother of institute is attend in each sub-district, and (A～J) be the sub-district label, the numeral of marking is carried out the network service time interval resource for distributing to this sub-district.Seven neighbor cells constitute a zone bunch (B-1 among Fig. 5, A-2, G-3, regional bunch of C-4 formation; E-1, I-2, D-3, J-4 constitute zone bunch), and duplicate all guarded regions of seamless covering with this.Wireless single-frequency Access Network adopts time-multiplexed thought, and the time interval resource in the network is distributed, and reduces the same frequency interference purpose that produces with time slot communication between each zone to reach.After adopting time-division multiplex technology, the sub-district that has the same communication time interval resource in the adjacent area bunch is far away at a distance of enough on geography, can reduce the same frequency interference of communicating by letter simultaneously and bring in these sub-districts effectively.Below two instances can be applied to for example monitoring technique field, portable terminal then can be the video monitoring equipment that moves, such as the video acquisition car etc.
At instance shown in Figure 5, suppose that all there is a portable terminal in each sub-district, promptly the time interval resource of each sub-district all distributes.The portable terminal of supposing the A district in this example moves to the D district, and network controller is central command and control center in this example, below in conjunction with the method for Fig. 4 direct-cut operation flow process of the present invention is described:
The first step, portable terminal pass through access slot to base station requests in the A district, distribute to obtain this sub-district time interval resource, transmit data at time slot 1 to source base station; More specifically, portable terminal can adopt CRC (Cyclic Redundancy Check, CRC) etc. the mistake calibration technology is encoded to sending data, make source base station to the data decoding of receiving after, can carry out the error code assessment.
Second step, source base station are deciphered processing to receiving data.Because portable terminal moves to the D district, A district source base station receives the data signal to noise ratio and reduces gradually.When occur can not lock-on signal or decoding data occur when wrong, A district source base station is made direct-cut operation and is made a strategic decision, and notifies central command and control center this 1 free time of sub-district time interval resource, can arrange and call.
The 3rd step, central command and control center are after receiving the idle message of A district time interval resource, and B to the G district transmission contiguous to the A district is collected in the message that time slot 1 is received data.The target neighbor cell that portable terminal gets into is judged according to the maximum principle of signal to noise ratio in the central authorities command and control center.
The 4th step, B to G district converge in the data that time slot 1 is received to central command and control center, reach the D district to make things convenient for it to judge portable terminal; Because the time interval resource 4 in D district is occupied, the idle time interval resource that step-length is a neighbor cell (label is the sub-district of A, C, H, I, J, E) is called in central command and control center.And have only the A district that has just discharged service that idle time interval resource 1 is arranged in the neighbor cell, and therefore new communication time slot 1 is distributed to this portable terminal in central command and control center, and target BS is base station, D district.
Need to prove, generally when system design, continuous a period of time is divided into several segments, for example: be designated as 1 to 7 in order.When existing in the system than multi-slot, also can be to the discrete time slot of cell allocation, promptly 1,3,5,7,9,10,11.Therefore the qualification that should not be construed as for example the embodiment of the invention of time slot of just distributing that distributes of the time slot shown in Fig. 5.
Broadcasted content is upgraded in the 5th step, central command and control center, and the content of broadcasting can be included as each portable terminal distributed time slot information; The base station with channel allocation advisory portable terminal, makes its adjustment data upload time slot through time slot, accomplishes direct-cut operation.Base station, D district in time slot 1 and time slot 4 receive from the sub-district portable terminal upload data.
As shown in Figure 5, each sub-district attendes that the institute marking-up is female to be the sub-district label, to mark numeral be the network service time interval resource that is distributed.Four neighbor cells constitute a zone bunch, and duplicate all guarded regions of seamless covering with this.Wireless single-frequency Access Network adopts time-multiplexed thought, and the time interval resource in the network is distributed, and reduces the same frequency interference purpose that produces with time slot communication between each zone to reach.After adopting time-division multiplex technology, the sub-district that has the same communication time interval resource in the adjacent area bunch is far away at a distance of enough on geography, can reduce the same frequency interference of communicating by letter simultaneously and bring in these sub-districts effectively.
At instance shown in Figure 6, suppose that all there is a portable terminal in each sub-district, promptly the time interval resource of each sub-district all distributes.In an embodiment, the portable terminal in A district moves to the D district, below in conjunction with Fig. 4 the direct-cut operation flow process is described:
The first step, portable terminal pass through access slot to base station requests in the A district, distribute to obtain this sub-district time interval resource, transmit data at time slot 2 to source base station;
Second step, source base station are deciphered processing to receiving data.Because portable terminal moves to the D district, A district source base station receives the data signal to noise ratio and reduces gradually.When occur can not lock-on signal or decoding data occur when wrong, A district source base station is made direct-cut operation and is made a strategic decision, and notifies central command and control center these 2 free time of sub-district time interval resource, can arrange and call;
The 3rd step, central command and control center are after receiving the idle message of A district time interval resource, and B to the G district transmission contiguous to the A district is collected in the message that time slot 2 is received data;
The 4th step, B to G district converge in the data that time slot 2 is received to central command and control center, reach the D district to make things convenient for it to judge portable terminal; Because the time interval resource 3 in D district is occupied, the idle time interval resource that step-length is a neighbor cell (the sub-district label is the sub-district of A, C, H, I, J, E) is called in central command and control center.And have only the A district that has just discharged service that idle time interval resource 2 is arranged in the neighbor cell, but if distribute time slot 2 to portable terminal, it produces with adjacent cell I and conflicts, therefore central command and control center refusal distributes time interval resource to this portable terminal.
Broadcasted content is upgraded in the 5th step, central command and control center, and time slot is passed through with channel allocation advisory portable terminal in the base station.Portable terminal is monitored the time slot content, finds the transfer of data time slot that not have coupling to conform to own identity, so stops to transmit data, and can releasable time interval resource through the access slot request, with access network next time.The ownership of base station, A district reserved time slot resource 2 wait for new portable terminal get into this sub-district or for adjacent cell call (meaning of representing among Fig. 6 just say the time interval resource label of sub-district A be 0 be illustrated as this district time interval resource be in idle condition; Do not have occupied), base station, D district original portable terminal in time slot 3 continues to receive from the sub-district is uploaded data.
The changing method of the embodiment of the invention need not terminal equipment and reports the radio link quality test report, has reduced some control Traffic Channels effectively, saves network overhead.Adopt base station end to trigger the mode of direct-cut operation decision-making, can effectively alleviate the table tennis switching problem under the terminal equipment triggering mode, guarantee the reliability of switching.Need not the base station based on the method for hard switching of source base station decision-making and converge the decoding data of all time slots, guaranteed that effectively the charge center obtains the real-time of monitor data to the charge center.
A kind of network controller, as shown in Figure 7, comprising:
Base station information receiving element 701 is used to receive the handover decisions relevant information that send the base station under the network controller;
Handover information transmitting element 703 is used for sending handover information to target BS; The indication of above-mentioned handover information has the terminal equipment incision, and the time slot of the use of communicate by letter between designated terminal equipment and target BS.
Further, as shown in Figure 8, above-mentioned network controller also comprises:
Base station information receiving element 801 also is used to receive the measurement report that send the base station, carries the signal to noise ratio of sending signal between above-mentioned base station and terminal equipment;
Access information transmitting element 803 is used for the access information to the source base station transmission, and above-mentioned access information indication has terminal equipment to insert.
The changing method of the embodiment of the invention need not terminal equipment and reports the radio link quality test report, has reduced some control Traffic Channels effectively, saves network overhead.Adopt base station end to trigger the mode of direct-cut operation decision-making, can effectively alleviate the table tennis switching problem under the terminal equipment triggering mode, guarantee the reliability of switching.Need not the base station based on the method for hard switching of source base station decision-making and converge the decoding data of all time slots, guaranteed that effectively the charge center obtains the real-time of monitor data to the charge center.
A kind of base station, as shown in Figure 9, comprising:
Data message receiving element 901 is used for the data message that receiving terminal apparatus sends;
Data message is confirmed unit 902, is used for confirming the handover decisions relevant information according to the reception situation of above-mentioned data message, and above-mentioned decision information is sent to network controller;
Handover information receiving element 903 is used to receive the handover information that network controller sends; Above-mentioned handover information indication has the terminal equipment incision, and the time slot of designated terminal equipment and the use of this inter base station communication;
Further, shown in figure 10, above-mentioned base station also comprises:
Further, shown in figure 11, above-mentioned base station also comprises:
Insert request receiving element 1101, be used for before the data message that receiving terminal apparatus sends the access request that receiving terminal sends;
Measuring unit 1102 is used for measuring according to the reception situation that inserts request;
Report transmitting element 1103 is used for the measurement report that measuring unit 1102 is measured is sent to network controller;
Access information receiving element 1104 is used to receive the access information that network controller sends, and above-mentioned access information indication has terminal equipment to insert;
Above-mentioned radio unit 904 also is used for through time slot the channel allocation information that inserts being sent to the terminal equipment of above-mentioned access; The channel allocation information of above-mentioned access is specified the time slot that inserts back terminal equipment and inter base station communication use.
The changing method of the embodiment of the invention need not terminal equipment and reports the radio link quality test report, has reduced some control Traffic Channels effectively, saves network overhead.Adopt base station end to trigger the mode of direct-cut operation decision-making, can effectively alleviate the table tennis switching problem under the terminal equipment triggering mode, guarantee the reliability of switching.Need not the base station based on the method for hard switching of source base station decision-making and converge the decoding data of all time slots, guaranteed that effectively the charge center obtains the real-time of monitor data to the charge center.
A kind of terminal, shown in figure 12, comprising:
Data message transmitting element 1201 is used for sending data message to the base station; On the time slot of specifying after switching, send data message;
Shown in figure 13 further, above-mentioned terminal also comprises:
Above-mentioned information receiving unit 1202 also is used on time slot receiving the channel allocation information of the access of sending the base station, and the channel allocation information of above-mentioned access is specified the time slot that inserts back terminal equipment and inter base station communication use;
Above-mentioned data message transmitting element 1201 also is used on the time slot of the access of above-mentioned appointment, sending data message.
A kind of single-frequency wireless access network, shown in figure 14, comprising: network controller 1401 and base station 1402, the network controller 1401 that provides for the embodiment of the invention of network controller 1401 wherein, the base station 1402 that base station 1402 provides for the embodiment of the invention.
The changing method of the embodiment of the invention need not terminal equipment and reports the radio link quality test report, has reduced some control Traffic Channels effectively, saves network overhead.Adopt base station end to trigger the mode of direct-cut operation decision-making, can effectively alleviate the table tennis switching problem under the terminal equipment triggering mode, guarantee the reliability of switching.Need not the base station based on the method for hard switching of source base station decision-making and converge the decoding data of all time slots, guaranteed that effectively the charge center obtains the real-time of monitor data to the charge center.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to accomplish through program; Above-mentioned program can be stored in a kind of computer-readable recording medium; The above-mentioned storage medium of mentioning can be a read-only memory, disk or CD etc.
More than changing method, device and the system of a kind of single-frequency wireless access network that the embodiment of the invention provided carried out detailed introduction; Used concrete example among this paper principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that on embodiment and range of application, all can change, to sum up, this description should not be construed as limitation of the present invention.
Claims (17)
1. the changing method of a single-frequency wireless access network is characterized in that, comprising:
Network controller receives the handover decisions relevant information that send the base station under the network controller;
Network controller is confirmed the direction of motion of terminal equipment according to said handover decisions relevant information; And confirm the target BS that switch at said terminal according to the direction of motion of said terminal equipment, said target BS is the base station that said terminal equipment will be cut;
Network controller sends handover information to target BS; The indication of said handover information has the terminal equipment incision, and the time slot of the use of communicate by letter between designated terminal equipment and target BS.
2. according to the said method of claim 1, it is characterized in that the time slot that uses of communicating by letter between said terminal equipment and target BS is:
The current time slots of target BS; Perhaps; Between designated terminal equipment and target BS, communicate by letter the time slot that uses as current time slots before; Whether the current time slots of judging said target BS is occupied; If take, the idle time slot of then confirming said target BS adjacent base station be terminal equipment with target BS between the communicate by letter time slot of use.
3. according to claim 1 or 2 said methods, it is characterized in that, also comprise before the handover decisions relevant information that send said reception base station:
Receive the measurement report that send the base station, carry the signal to noise ratio of sending signal between said base station and terminal equipment; Confirm that according to measurement report the maximum base station of signal to noise ratio is a source base station;
The access information that network controller sends to source base station, the information that said access information indication has terminal equipment to insert.
4. the changing method of a single-frequency wireless access network is characterized in that, comprising:
The data message that receiving terminal apparatus sends;
Reception situation according to said data message is confirmed the handover decisions relevant information, and said decision information is sent to network controller;
Receive the handover information that network controller sends; Said handover information indication has the terminal equipment incision, and the time slot of designated terminal equipment and the use of this inter base station communication;
Channel allocation information after said base station will be switched through time slot sends to the terminal equipment of said incision; Channel allocation information after the said switching is specified the time slot that switches back terminal equipment and inter base station communication use.
5. according to the said method of claim 4, it is characterized in that, also comprise before the handover information that said reception network controller sends:
Confirm according to said handover decisions relevant information whether said terminal equipment switches, if then discharge the time interval resource that said terminal equipment takies.
6. according to the said method of claim 5, it is characterized in that said data message adopts the error checking and correction technology for encoding;
Said reception situation according to data message confirms that the handover decisions relevant information comprises:
Said data message is deciphered, obtained the error rate;
Confirming according to said handover decisions relevant information whether said terminal equipment switches comprises:
, the error rate confirms that said terminal equipment switches when reaching predetermined value.
7. according to any said method of claim 4 to 6, it is characterized in that, also comprise before the data message that receiving terminal apparatus sends:
The access request that receiving terminal sends;
Reception situation according to inserting request is measured, and measurement report is sent to network controller;
Receive the access information that network controller sends, said access information indication has terminal equipment to insert;
Said base station sends to the channel allocation information that inserts through time slot the terminal equipment of said access; The channel allocation information of said access is specified the time slot that inserts back terminal equipment and inter base station communication use.
8. the changing method of a single-frequency wireless access network is characterized in that, comprising:
Send data message to the base station;
The time slot that terminal equipment and inter base station communication used after channel allocation information after receiving the switching of sending the base station on the time slot, the channel allocation information after the said switching were specified and switched;
Send data message on the time slot after said appointment is switched.
9. said according to Claim 8 method is characterized in that, saidly before data message is sent in the base station, also comprises:
Send the request of access to the base station;
On time slot, receive the base station and send the channel allocation information that inserts, the time slot that the channel allocation information of said access specifies access back terminal equipment and inter base station communication to use;
On the time slot of the access of said appointment, send data message.
10. a network controller is characterized in that, comprising:
The base station information receiving element is used to receive the handover decisions relevant information that send the base station under the network controller;
First decision package is used for the direction of motion that the said handover decisions relevant information of foundation is confirmed terminal equipment; And confirm the target BS that switch at said terminal according to the direction of motion of said terminal equipment, said target BS is the base station that said terminal equipment will be cut;
The handover information transmitting element is used for sending handover information to target BS; The indication of said handover information has the terminal equipment incision, and the time slot of the use of communicate by letter between designated terminal equipment and target BS.
11. according to the said network controller of claim 10, it is characterized in that, also comprise:
The base station information receiving element also is used to receive the measurement report that send the base station, carries the signal to noise ratio of sending signal between said base station and terminal equipment;
Second decision package is used for confirming that according to measurement report the maximum base station of signal to noise ratio is a source base station;
The access information transmitting element is used for the access information to the source base station transmission, and said access information indication has terminal equipment to insert.
12. a base station is characterized in that, comprising:
The data message receiving element is used for the data message that receiving terminal apparatus sends;
Data message is confirmed the unit, is used for confirming the handover decisions relevant information according to the reception situation of said data message, and said decision information is sent to network controller;
The handover information receiving element is used to receive the handover information that network controller sends; Said handover information indication has the terminal equipment incision, and the time slot of designated terminal equipment and the use of this inter base station communication;
Radio unit, the channel allocation information after being used for will switching through time slot sends to the terminal equipment of said incision; Channel allocation information after the said switching is specified the time slot that switches back terminal equipment and inter base station communication use.
13. according to the said base station of claim 12, it is characterized in that, also comprise:
The handover decisions unit is used for before the handover information that receives the network controller transmission, confirming according to said handover decisions relevant information whether said terminal equipment switches;
Discharge performance element, be used for if said handover decisions unit confirms that the result is for being then to discharge the time interval resource that said terminal equipment takies.
14. according to claim 12 or 13 said base stations, it is characterized in that, also comprise:
Insert the request receiving element, be used for before the data message that receiving terminal apparatus sends the access request that receiving terminal sends;
Measuring unit is used for measuring according to the reception situation that inserts request;
The report transmitting element is used for the measurement report that measuring unit is measured is sent to network controller;
The access information receiving element is used to receive the access information that network controller sends, and said access information indication has terminal equipment to insert;
Said radio unit also is used for through time slot the channel allocation information that inserts being sent to the terminal equipment of said access; The channel allocation information of said access is specified the time slot that inserts back terminal equipment and inter base station communication use.
15. a terminal is characterized in that, comprising:
The data message transmitting element is used for sending data message to the base station; On the time slot of specifying after switching, send data message;
Information receiving unit is used for the channel allocation information after receiving the switching of sending the base station on the time slot, the time slot that terminal equipment and inter base station communication used after the channel allocation information after the said switching was specified and switched.
16. according to the said terminal of claim 15, it is characterized in that, also comprise:
Request transmitting unit is used for before data message is sent in the base station, sending the request of access to the base station;
Said information receiving unit also is used on time slot receiving the channel allocation information of the access of sending the base station, and the channel allocation information of said access is specified the time slot that inserts back terminal equipment and inter base station communication use;
Said data message transmitting element also is used on the time slot of the access of said appointment, sending data message.
17. a single-frequency wireless access network comprises: network controller and base station, it is characterized in that,
Network controller is claim 10 or 11 described network controllers, and the base station is any described base station of claim 12 to 14.
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| CN201010570418.8A CN102487539B (en) | 2010-12-02 | 2010-12-02 | Switching method, device and system of single-frequency wireless access network |
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| CN102487539B (en) | 2014-12-10 |
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