CN1859791A - Method and system for realizing switching in radio communication network and its base station - Google Patents
Method and system for realizing switching in radio communication network and its base station Download PDFInfo
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- CN1859791A CN1859791A CNA2006100348265A CN200610034826A CN1859791A CN 1859791 A CN1859791 A CN 1859791A CN A2006100348265 A CNA2006100348265 A CN A2006100348265A CN 200610034826 A CN200610034826 A CN 200610034826A CN 1859791 A CN1859791 A CN 1859791A
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Abstract
The present invention discloses radio evolution network realizing switching method and system. It contains through in switching source base station and target base station signaling interaction, adopting plurality of terminal public relevant signaling mode, the signaling interaction between terminal and base station, between base station and access network, adopting each terminal switching corresponding one signaling mode to realize radio evolution network batch switching. Said invention relieves broadband load.
Description
Technical field
The present invention relates to moving communicating field, particularly the handoff technique in the cordless communication network.
Background technology
In order to keep third generation partner program (3GPP, 3rd Generation Partnership Project) competitiveness of connecting system, carrying out the Long Term Evolution (LTE of network evolution aspect, Long Term Evolution) and the research of System Architecture Evolution (SAE, SystemArchitecture Evolution).The target of network evolution is to simplify network configuration, reduction delay turn-on time.In the radio gradual network system in future, the network evolution architecture has multiple candidate scheme, and wherein popular have a two-layer node framework, as shown in Figure 1.IAD (AGW, AccessGateway) be evolution Universal Terrestrial Radio Access Network network (E-UTRAN, Enhanced UniversalTerrestrial Radio Access Network) IAD, eNodeB is the Node B after the evolution, it is the evolution base station among the E-UTRAN, most RNC function before it has.Access GW has former core net node, as the most of function or the function combinations of GPRS service support point (SGSN, Serving GPRS SupportNode) or GPRS gateway support point (GGSN, Gateway GPRS Support Node).Wherein outside repeat requests (Outer ARQ, Auto RepeatQuest) function automatically mainly is placed on the eNodeB place.
For fear of based on producing the data cached problem of losing in eNodeB place, source in the handoff procedure of this framework, existing technical scheme mostly adopts the data forwarding mode in handoff procedure.Its switching flow as shown in Figure 2, this handoff procedure mainly comprises the steps:
Step 201: subscriber equipment (UE, user equipment) is to source base station (eNodeB) reporting measurement reports;
Step 202: the metrical information that source base station reports according to UE and resource, the load condition of source base station are done handover decisions;
Step 203: source base station is Context by Xur to target BS and is transmitted; Source base station transmits UE context to target BS, such as RB information etc.;
Step 204: target BS is that UE distributes and reserved resource based on the QoS information among the UE context;
Step 205: after resource allocation is finished, return a UE Context of source base station (SNodeB) transmission response by Xur mouth target BS (TNodeB);
Step 206, source base station will be forwarded to target BS at the downlink data that the data of not receiving UE confirmation of receipt character (ACK, ACKnowledge Character) as yet of this locality storage and the AGW that constantly receives send;
Step 207:RB reprovision, source base station is to the UE configuration relevant parameter with new sub-district communication, and indication UE switches to new sub-district;
Step 208: the switching of layer 1: accept data from Target cell, UE and Target cell are synchronous.
Step 209:RB reprovision is finished: UE and Target cell synchronously after, issue Target cell RBReconfiguration Complete message and switch with indication and finish;
Step 210: target eNode B sends Path Switch Request message, request toggle path to AGW;
Step 211:AGW toggle path is to target BS, and sends Release message, release way to source base station.
The signaling send mode that adopts according to existing flow process can cause certain influence to performance, makes handover delay bigger.In addition, because in the evolvement network, link between the base station belongs to the link of " last kilometer ", its limited bandwidth, be in the bottleneck of Network Transmission, and the switching meeting between the base station is very frequent, so the load of the Signalling exchange in the handoff procedure is heavier, can produce bigger pressure to the link between the base station.
Summary of the invention
In view of this, the technical problem that will solve of the present invention is to provide a kind of method and system of switching of realizing in cordless communication network, reducing the signaling traffic load in the handoff procedure in the cordless communication network, and guarantees the demand of handoff delay.
The another technical problem that the present invention will solve is to provide a kind of base station, in wireless communication system, realizes the switching controls to terminal, thereby switches with the batch of realizing a plurality of terminals, reduces the signaling traffic load in the handoff procedure.
For solving the problems of the technologies described above, the present invention realizes in the following manner:
A kind of method that realizes switching in cordless communication network provided by the invention may further comprise the steps:
A, source base station select to be switched terminal to switch, and described to be switched terminal information is packed in the handoff request signaling, send to candidate target base station;
B, described candidate target base station are carried out resource reservation after receiving described handoff request signaling, and the resource reservation result is packaged in the handoff response signaling, send to source base station;
C, source base station are that to be switched terminal is determined target BS according to described handoff response signaling, and the triggering following switching flow.
Wherein, steps A specifically comprises:
A1, the source base station result that measurement reports according to terminal are switched decision-premaking, select at least one terminal to switch, and the handoff candidate base station of each terminal is one or more;
A2, source base station to some candidate target base station, are selected at least one terminal to switch, and described at least one terminal information are packaged in the handoff request signaling according to switching the decision-premaking conclusion, send to candidate target base station.
In steps A 2, a certain terminal information can be included in the signaling that mails to different candidate target base station simultaneously.
Described step B specifically comprises:
After B1, candidate target base station receive the handoff request signaling,, carry out access control, and carry out the storage of resource reservation and context for the terminal of access according to the end message in the signaling;
B2, target BS are packaged in the handoff response signaling according to the result of resource reservation, send back to source base station.Candidate target base station is carried out access control according to the total service quality in the handoff request signaling in step B1, if resource reservation is then directly carried out in the access success; If access failure, then the terminal in the end message tabulation is carried out the access control of order, in the terminal in the end message tabulation being carried out separately the access process, if access, then this terminal is carried out resource reservation, if for a certain terminal access failure, then no longer carry out access judgement to the follow-up terminal in the end message tabulation.
Above-mentioned to follow-up end message tabulation carrying out in the admission control process of order, if some terminal access failures, also can proceed access control, and provide amending advice, when follow-up switching, adopt for source base station to the service request of terminal according to the access control result.
Result at resource reservation described in the step B2 comprises the terminal list and the unaccredited terminal list of access.
The result of described resource reservation also comprises unaccredited terminal reason and to the service parameter of the suggestion of unaccredited terminal.
Described step C comprise source base station be the terminal of each access according to the selected target BS of the order that receives the handoff response signaling, and the terminal of access switched., perhaps hang up or according to the suggestion in the handoff response, revise its service request attribute according to its reason for unaccredited terminal, the handover process that puts it into other then goes to handle.Though for access and reserved resource, but be not confirmed as the candidate target base station of target BS, source base station sends to switch to this candidate target base station confirms signaling, comprise the resource information that needs discharge in the signaling, this candidate target base station discharges corresponding information after receiving that signaling is confirmed in switching.
Further, in step B1, described candidate target base station starts timer when carrying out resource reservation, when timer expires, if candidate target base station does not receive that still the switching that the corresponding terminal of resource reservation is sent finishes signaling, then discharges resource.
Concrete, above-mentioned follow-up switching flow comprises:
D, source base station are connected the terminal of switching to decision by the Radio Link with each terminal foundation and send switching command, comprise the final target BS information of determining in the signaling;
E, the terminal that receives switching command are carried out simultaneous operation with target BS respectively; After being synchronized to target BS, each terminal sends to switch to target BS respectively finishes order;
F, target BS receive switch finish order after, send to switch to IAD and finish signaling, the notice IAD carries out the path and switches, the notification source base station discharges resource simultaneously; Perhaps target BS to after date, sends the resource release signaling to source base station after signaling is finished in the switching that receives all terminals of switching or at a timer, comprises the end message tabulation of waiting to discharge resource in this resource release signaling;
G, IAD receive switch finish signaling after, the path of corresponding terminal is switched to target BS.
Preferable, in steps A, described to be switched terminal information is packed in the handoff request signaling and is meant, one or more terminal information are packaged in the handoff request signaling.
Comprise the total quality of service information of to be switched terminal and the tabulation of each service in base station information in the described handoff request signaling.
The present invention also provides the method that realizes switching in a kind of cordless communication network, it is characterized in that: in handoff procedure, Signalling exchange between source base station and the target BS adopts the public corresponding means of signaling of a plurality of terminals, and between terminal and the base station, the Signalling exchange between base station and the Access Network adopts the corresponding means of signaling of the switching of each terminal.
Described public corresponding means of signaling is meant, comprises the mapping relations of multi-to-multi in handoff request/response signaling: comprise a plurality of end messages in the handoff request/response signaling; An end message is included in a plurality of handoff request/response signalings.
After described target BS is received described handoff request signaling, according to the end message in the signaling, carry out access control, and carry out the storage of resource reservation and context for the terminal of access, target BS is packaged in the public handoff response signaling according to the result of resource reservation, sends back to source base station.
The result of described resource reservation comprises the terminal list and the unaccredited terminal list of access.
Source base station comprises the total quality of service information and the service in base station information list of to be switched terminal in the handoff request signaling that target BS sends.
Total quality of service information of described to be switched terminal be the bandwidth requirement in the QoS parameter of each terminal traffic the weighting statistics and, described switching priority is that source base station is determined according to the channel condition and/or the service attribute of each terminal.
Target BS carries out access control according to the total service quality in the handoff request signaling of receiving source base station, if resource reservation is then directly carried out in the access success; If access failure, then the terminal in the end message tabulation is carried out the access control of order, in the terminal in the end message tabulation being carried out separately the access process, if access, then this terminal is carried out resource reservation,, then no longer carry out access judgement the follow-up terminal in the end message tabulation if for a certain terminal access failure.
The present invention provides in a kind of cordless communication network the system switched of realizing again, comprises at least one terminal and a plurality of base station, it is characterized in that: described base station comprises during as source base station:
Switch the decision-premaking unit,, switch decision-premaking, determine to be switched terminal, and determine at least one candidate target base station for to be switched terminal in order in handoff procedure;
The handoff request unit in order to be switched end message is packed in the handoff request signaling, sends to candidate target base station; With
Switch whole decision package,, switch whole decision-making, for the selected target BS of to be switched terminal switches according to the information in the signaling in order to after receiving the response signaling of candidate target base station.
Also comprise during as target BS in the described base station:
Switch the access control unit, in order in handoff procedure according to the information in the handoff request signaling of source base station, terminal is carried out access control, and carries out resource reservation and context is stored for the terminal of access;
The handoff response unit is packaged in the handoff response signaling in order to the result that will switch the reservation of access control element resources, sends to source base station.
Further, described switching access control comprises timer in the unit, in order to being that the terminal of access starts when carrying out resource reservation at target BS, when this timer expires, target BS does not receive still that the corresponding terminal of resource reservation is sent and switches when finishing signaling that this target BS discharges reserved resource.
Further, in the handoff request signaling of described handoff request unit after the packing that candidate target base station sends, comprise the tabulation of total quality of service attribute and each service in base station information of all to be switched terminals.
The present invention provides a kind of base station again, is used for the switching controls of wireless communication system realization to terminal, it is characterized in that this base station comprises:
Switch the decision-premaking unit,, switch decision-premaking, determine to be switched terminal, and determine at least one candidate target base station for to be switched terminal in order in handoff procedure;
The handoff request unit in order to be switched end message is packed in the handoff request signaling, sends to candidate target base station;
Switch whole decision package,, switch whole decision-making, for the selected target BS of to be switched terminal switches according to the information in the signaling in order to after receiving the response signaling of candidate target base station;
Switch the access control unit,, terminal is carried out access control, and carry out resource reservation and context is stored for the terminal of access in order to the information in the handoff request signaling that in handoff procedure, sends according to the handoff request unit of source base station; With
The handoff response unit is packaged in the handoff response signaling in order to the result that will switch the reservation of access control element resources, sends to source base station.
By relatively finding, in existing wireless communications network, may be regular between the base station switch, the signaling traffic that is produced by switching is also more considerable.Scheme provided by the invention, adopt the public corresponding means of signaling of a plurality of terminals at handoff procedure by the Signalling exchange between source base station and target BS, the hand off signaling that can reduce between source base station and the target BS is mutual, alleviate the signaling traffic load requirement, alleviated the broadband load of " last kilometer ".Especially for evolution network framework, have great significance.On the other hand, the switching of UE is a kind of means that realize load balancing, and the situation that a large amount of UE switches simultaneously also can appear in this process, can realize that by the present invention the batch of UE switches.During switching that this load balancing in handling evolvement network causes, also have great significance.
Description of drawings
Fig. 1 is existing radio gradual network structure schematic diagram;
Fig. 2 is existing switching flow schematic diagram;
Fig. 3 is the schematic flow sheet of changing method provided by the invention;
Fig. 4 is an architecture of base station schematic diagram provided by the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
Figure 3 shows that first preferred embodiment of the changing method in the evolvement network provided by the invention, UE can be one or more in the changing method provided by the present invention, and target BS also can be one or more, and diagram is only expressed 1 among Fig. 3 for convenience.No matter among the present invention the evolution base station in the evolvement network is called eNodeB, also can be described as enode b or base station in the practical application, be to be called eNodeB, enode b also or the base station, and its effect all is identical.
As shown in Figure 3, the changing method in the evolvement network provided by the invention mainly may further comprise the steps:
Measure control and measurement between step 301:UE and the source base station and report, the measurement report that source base station reports according to each UE is collected all UE of this sub-district at the channel conditions of this sub-district and the channel conditions of adjacent sub-district;
Step 302: the channel conditions of each UE that the source base station basis is collected, the decision-premaking that switches, in the decision-premaking process, source base station may select one or more UE to switch, and the target BS of the switching of each UE may be one or more;
Step 303: source base station is according to the conclusion of switching decision-premaking, for some target BS, select one or more UE to switch, and with the information package of these UE in a handoff request signaling, send to target BS, the information of some UE may comprise in the signaling that mails to different target BS simultaneously;
Step 304: after target BS receives the handoff request signaling,, carry out access control, and carry out the storage of resource reservation and context for the UE of access according to the UE information in the signaling;
Step 305: target BS is packaged in the result of resource reservation in the step 304 in the handoff response signaling, send back to source base station, this result comprises UE tabulation and the unaccredited UE tabulation and the reason of access, can also comprise service parameter among the result to the suggestion of unaccredited UE, advise that promptly source base station revises the service request parameter of these UE, make target BS can accept access;
Step 306: after source base station receives the handoff response signaling, switch whole decision-making according to the information in the signaling, by whole decision-making, source base station is to the selected unique target BS of the UE of each access, and the UE of access is switched, for unaccredited UE, according to its reason, perhaps hang up or according to the suggestion in the handoff response, revise its service request attribute, the handover process that puts it into other then goes to handle;
Step 307: switch affirmation.Because when switching decision-premaking, the handoff request of a UE may be addressed to a plurality of target BS, and may be by a plurality of target BS accesses, and when whole decision-making, have only the switching target of a target BS as this UE, therefore for the target BS of access and reserved resource not as final switching target but, source base station sends to switch to it confirms signaling, comprise the d/d resource information of needs in the signaling, target BS discharges corresponding information after receiving switching affirmation signaling;
Step 308: the UE that source base station switches to decision sends switching command, comprises the target BS of final decision in the signaling, and this signaling sends to each UE respectively by being connected with Radio Link that each UE sets up;
Step 309: the UE that receives switching command carries out simultaneous operation with target BS respectively;
Step 310: after being synchronized to target BS, each UE sends to switch to target BS respectively and finishes signaling;
Step 311: target BS receive switch finish signaling after, send to switch to IAD and finish signaling, the notice IAD carries out the path and switches;
Step 312: IAD receive switch finish signaling after, the path of corresponding UE is switched to target BS;
Step 313: target BS sends the resource release signaling to source base station, and the notification source base station discharges the resource of corresponding UE;
Step 314: source base station confirms that UE has finished switching after receiving the resource release signaling, and the resource of this UE is all discharged.
In the said process, step 301 to step 307 is all finished at one or more UE, all comprises the information of one or more UE in a handoff request and handoff response signaling, thereby has reduced Signalling exchange load between source base station and the target BS.Step 308 to step 310 item communicates with single UE to be finished.In order to reduce the switching time of each UE, target BS switches to send to switch to IAD immediately after finishing signaling and finishes signaling receiving step 310, the notice IAD carries out the path and switches, and the notification source base station discharges resource simultaneously, so this process is also at each UE.
To be described at the second preferable enforcement of the changing method in a kind of evolvement network provided by the invention below, the department identical with first embodiment will repeat no more, and emphasis is described different piece.In the present embodiment step 307 ' in, when target BS carries out resource reservation, start a timer, when timer expires,, then discharge resource if target BS does not receive that still the switching that the corresponding UE of resource reservation sends finishes signaling.Thereby need between source base station and target BS, not carry out confirming the transmission of signaling as the switching of step 307 in first preferred embodiment, thereby reduce the Signalling exchange between source base station and the target BS, reduce because of the heavier pressure that link between the base station is produced of Signalling exchange load.
To be described at the 3rd preferable enforcement of the changing method in a kind of evolvement network provided by the invention below, the part identical with first embodiment or second embodiment will repeat no more, and emphasis is described different piece.In order further to reduce the Signalling exchange between source base station and the target BS, the present invention is directed to step 311 and " provide another implementation.Target BS to after date, just sends the signaling that resource discharges to source base station after signaling is finished in the switching that receives all UE that switch or at a timer, comprise the tabulation of the UE information of waiting to discharge resource in this resource release signaling.Like this, the Signalling exchange between source base station and the target BS can further reduce.
In above-mentioned preferred embodiment, step 303 (303 ' or 303 ") in, source base station has comprised the information list of to be switched UE in the handoff request signaling that target BS sends.The institutional framework of relevant information is as shown in table 1 in this signaling:
Table 1
For each UE, have a plurality of Business Streams, so the information of each Business Stream of each UE is included in the handoff request signaling.When switching decision-premaking, source base station also calculates according to the Business Stream information separately (mainly being QoS information) of to be switched UE, draw at one of these UE total service attribute, be called total quality of service attribute, and it is attached to the beginning of UE information list.In the present embodiment, weighting statistics and (equivalent bandwidth) of the bandwidth requirement in this total quality of service information qos parameter that is each UE business.In addition, source base station is determined the switching priority of UE also according to the current information (comprising channel condition, service attribute) of each UE, and according to switching prioritization UE information is included in (as shown in table 1) in the business attribute information table.
Target BS at first, carries out access control according to total quality of service attribute after receiving the handoff request signaling that source base station sends.If draw the conclusion that allows access according to total quality of service attribute, promptly no longer divide other access control to each UE, but carry out contextual storage and resource reservation (under the situation of shared channel traffic differentiation scheduling, resource need not reserved) according to the attribute of each UE in the follow-up tabulation; If draw the conclusion of refusal access according to total quality of service attribute, then from tabulation, take out corresponding UE information successively again, carry out access control separately, if access, then this UE is carried out context storage and resource reservation, if access not, the access of follow-up UE judgement in then no longer tabulating, and direct terminal procedure, and access UE and not the UE information of access be packaged in together in the handoff response signaling and be returned to source base station.
Source base station is selected the final objective base station according to the order that receives the handoff response signaling, if some UE in a handoff response signaling that arrives earlier by access, then source base station sends switching command to this UE immediately, if go back this UE of access in the handoff response signaling that other target BS of receiving are again afterwards sent, then source base station sends to switch and confirms signaling, require this target BS to discharge related resource, perhaps what is not done, and treats that the timer at target BS place discharges related resource automatically to after date.
The minimizing target BS that the process of above-mentioned target BS can be tried one's best is accelerated switch speed to the processing time of handoff request signaling.
Carry out in separately the admission control process from tabulation, taking out corresponding UE information successively, if some UE access failures, also can proceed access control, and provide amending advice, when follow-up switching, adopt for source base station to the service request of this UE according to the access control result.
In order to prevent to switch the chance that the lower UE of priority can't obtain to switch always, for the UE with a plurality of candidate handover target base station, being provided with according to different target BS of the switching priority of UE has difference.Be that UE priority for certain eNodeB is higher, may priority for other eNodeB lower (similar each UE has a major heading base station, the notion of a plurality of backup targets base station, on average, the major heading base station of different UEs is equally distributed).
After a certain UE was refused by all target eNode B, its priority can correspondingly improve, to increase the chance of next handover success.
The present invention also provides a kind of base station, and the switched system that comprises this base station, and the structural representation of base station as shown in Figure 5, described base station comprises switches the decision-premaking unit, the handoff request unit switches whole decision package, switches access control unit and handoff response unit.To further specify the function of each unit in this base station by detailed description below to switched system.
Switched system provided by the invention comprises at least one terminal and a plurality of base station, it is characterized in that: described base station comprises during as source base station:
Switch the decision-premaking unit,, switch decision-premaking, determine to be switched terminal, and determine at least one candidate target base station for to be switched terminal in order in handoff procedure;
The handoff request unit in order to be switched end message is packed in the handoff request signaling, sends to candidate target base station; With
Switch whole decision package,, switch whole decision-making, for the selected target BS of to be switched terminal switches according to the information in the signaling in order to after receiving the response signaling of candidate target base station.
Also comprise during as target BS in the described base station:
Switch the access control unit, in order in handoff procedure according to the information in the handoff request signaling of source base station, terminal is carried out access control, and carries out resource reservation and context is stored for the terminal of access;
The handoff response unit is packaged in the handoff response signaling in order to the result that will switch the reservation of access control element resources, sends to source base station.
Described switching access control comprises timer in the unit, in order to being that the terminal of access starts when carrying out resource reservation at target BS, when this timer expired, target BS did not receive still that the corresponding terminal of resource reservation is sent and switches when finishing signaling that this target BS discharges reserved resource.
In the handoff request signaling of described handoff request unit after the packing that candidate target base station sends, comprise the tabulation of total quality of service attribute and each service in base station information of all to be switched terminals.This tabulation can be arranged according to switching priority orders, for fear of switch the chance that the lower UE of priority can't obtain to switch always, in case some UE are access in failure, then with the corresponding lifting of its priority, increases the chance of next handover success.In addition, this tabulation also can be sorted not according to the priority level of UE, to prevent that carrying out access in order at the target BS place adjudicates the situation that the UE of some low priority that may cause is access in never.Detailed description about this tabulation is described part referring to changing method provided by the invention, does not repeat them here.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with the people of this technology in the disclosed technical scope of the present invention; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.
Claims (27)
1, a kind of method that realizes switching in wireless communication system is characterized in that may further comprise the steps:
A, source base station select to be switched terminal to switch, and described to be switched terminal information is packed in the handoff request signaling, send to candidate target base station;
B, described candidate target base station are carried out resource reservation after receiving described handoff request signaling, and the resource reservation result is packaged in the handoff response signaling, send to source base station;
C, source base station are that to be switched terminal is determined target BS according to described handoff response signaling, and the triggering following switching flow.
2, according to right 1 described method, it is characterized in that: steps A comprises:
A1, the source base station result that measurement reports according to terminal are switched decision-premaking, select at least one terminal to switch, and the switching candidate target base station of each terminal is one or more;
A2, source base station to some candidate target base station, are selected at least one terminal to switch, and described at least one terminal information are packaged in the handoff request signaling according to switching the decision-premaking conclusion, send to candidate target base station.
3, method according to claim 2 is characterized in that: in the steps A 2, a certain terminal information can be included in the signaling that mails to different candidate target base station simultaneously.
4, method according to claim 1, it is characterized in that: step B comprises:
After B1, candidate target base station receive the handoff request signaling,, carry out access control, and carry out the storage of resource reservation and context for the terminal of access according to the end message in the signaling;
B2, candidate target base station are packaged in the handoff response signaling according to the result of resource reservation, send back to source base station.
5, method according to claim 4 is characterized in that: candidate target base station is carried out access control according to the total service quality in the handoff request signaling among the step B1, if resource reservation is then directly carried out in the access success; If access failure, then the terminal in the end message tabulation is carried out the access control of order, in the terminal in the end message tabulation being carried out separately the access process, if access, then this terminal is carried out resource reservation, if for a certain terminal access failure, then no longer carry out access judgement to the follow-up terminal in the end message tabulation.
6, method according to claim 5, it is characterized in that: follow-up end message tabulation is being carried out in the admission control process of order, if some terminal access failures, also can proceed access control, and provide amending advice to the service request of terminal according to the access control result, adopt when follow-up switching for source base station.
7, method according to claim 4 is characterized in that: the result of resource reservation described in the step B2 comprises the terminal list and the unaccredited terminal list of access.
8, method according to claim 7 is characterized in that: the result of described resource reservation also comprises unaccredited terminal reason and to the service parameter of the suggestion of unaccredited terminal.
9, method according to claim 4 is characterized in that: step C comprise source base station be the terminal of each access according to the selected target BS of the order that receives the handoff response signaling, and the terminal of access switched.
10, method according to claim 9, it is characterized in that: described step C also comprises: for unaccredited terminal according to its reason, perhaps hang up or according to the suggestion in the handoff response, revise its service request attribute, the handover process that puts it into other then goes to handle.
11, method according to claim 9, it is characterized in that: step C also comprises, though for access and reserved resource, but be not confirmed as the candidate target base station of target BS, source base station sends to switch to this candidate target base station confirms signaling, comprise the resource information that needs discharge in the signaling, this candidate target base station discharges corresponding information after receiving that signaling is confirmed in switching.
12, method according to claim 4, it is characterized in that: among the step B1, described candidate target base station starts timer when carrying out resource reservation, when timer expires, if candidate target base station does not receive that still the switching that the corresponding terminal of resource reservation is sent finishes signaling, then discharge resource.
13, according to each described method of claim 1 to 12, it is characterized in that: described follow-up switching flow comprises:
D, source base station are connected the terminal of switching to decision by the Radio Link with each terminal foundation and send switching command, comprise the final target BS information of determining in the signaling;
E, the terminal that receives switching command are carried out simultaneous operation with target BS respectively; After being synchronized to target BS, each terminal sends to switch to target BS respectively finishes order;
F, target BS receive switch finish order after, send to switch to IAD and finish signaling, the notice IAD carries out the path and switches, the notification source base station discharges resource simultaneously; Perhaps
Target BS to after date, sends the resource release signaling to source base station after signaling is finished in the switching that receives all terminals of switching or at a timer, comprise the end message tabulation of waiting to discharge resource in this resource release signaling;
G, IAD receive switch finish signaling after, the path of corresponding terminal is switched to target BS.
14, according to each described method of claim 1 to 12, it is characterized in that: in the steps A described to be switched terminal information is packed in the handoff request signaling and is meant, one or more terminal information are packaged in the handoff request signaling.
15, method according to claim 14 is characterized in that: comprise the total quality of service information of to be switched terminal and the tabulation of each service in base station information in the described handoff request signaling.
16, realize the method for switching in a kind of wireless communication system, it is characterized in that:
In handoff procedure, the Signalling exchange between source base station and the target BS adopts the public corresponding means of signaling of a plurality of terminals, and between terminal and the base station, the Signalling exchange between base station and the Access Network adopts the corresponding means of signaling of the switching of each terminal.
17, method according to claim 16 is characterized in that: described public corresponding means of signaling is meant, comprises the mapping relations of multi-to-multi in handoff request/response signaling: comprise a plurality of end messages in the handoff request/response signaling; An end message is included in a plurality of handoff request/response signalings.
18, method according to claim 16, it is characterized in that: after described target BS is received described handoff request signaling, according to the end message in the signaling, carry out access control, and carry out the storage of resource reservation and context for the terminal of access, target BS is packaged in the public handoff response signaling according to the result of resource reservation, sends back to source base station.
19, method according to claim 18 is characterized in that: the result of described resource reservation comprises the terminal list and the unaccredited terminal list of access.
20, according to each described method of claim 16 to 19, it is characterized in that: source base station comprises the total quality of service information and the service in base station information list of to be switched terminal in the handoff request signaling that target BS sends.
21, method according to claim 20, it is characterized in that: total quality of service information of described to be switched terminal for the weighting statistics of the bandwidth requirement in the QoS parameter of each terminal traffic and, described switching priority is that source base station is determined according to the channel condition and/or the service attribute of each terminal.
22, method according to claim 20 is characterized in that: target BS carries out access control according to the total service quality in the handoff request signaling of receiving source base station, if resource reservation is then directly carried out in the access success; If access failure, then the terminal in the end message tabulation is carried out the access control of order, in the terminal in the end message tabulation being carried out separately the access process, if access, then this terminal is carried out resource reservation, if for a certain terminal access failure, then stop access judgement to the follow-up terminal in the end message tabulation.
23, the system of realize switching in a kind of cordless communication network comprises at least one terminal and a plurality of base station, it is characterized in that: described base station comprises during as source base station:
Switch the decision-premaking unit,, switch decision-premaking, determine to be switched terminal, and determine at least one candidate target base station for to be switched terminal in order in handoff procedure;
The handoff request unit in order to be switched end message is packed in the handoff request signaling, sends to candidate target base station; With
Switch whole decision package,, switch whole decision-making, for the selected target BS of to be switched terminal switches according to the information in the signaling in order to after receiving the response signaling of candidate target base station.
24, system according to claim 23 is characterized in that, also comprises during as target BS in the described base station:
Switch the access control unit, in order in handoff procedure according to the information in the handoff request signaling of source base station, terminal is carried out access control, and carries out resource reservation and context is stored for the terminal of access;
The handoff response unit is packaged in the handoff response signaling in order to the result that will switch the reservation of access control element resources, sends to source base station.
25, system according to claim 24, it is characterized in that, described switching access control comprises timer in the unit, in order to being that the terminal of access starts when carrying out resource reservation at target BS, when this timer expires, target BS does not receive still that the corresponding terminal of resource reservation is sent and switches when finishing signaling that this target BS discharges reserved resource.
26, method according to claim 23, it is characterized in that: in the handoff request signaling of described handoff request unit after the packing that candidate target base station sends, comprise the tabulation of total quality of service attribute and each service in base station information of all to be switched terminals.
27, a kind of base station is used for the switching controls of wireless communication system realization to terminal, it is characterized in that this base station comprises:
Switch the decision-premaking unit,, switch decision-premaking, determine to be switched terminal, and determine at least one candidate target base station for to be switched terminal in order in handoff procedure;
The handoff request unit in order to be switched end message is packed in the handoff request signaling, sends to candidate target base station;
Switch whole decision package,, switch whole decision-making, for the selected target BS of to be switched terminal switches according to the information in the signaling in order to after receiving the response signaling of candidate target base station;
Switch the access control unit,, terminal is carried out access control, and carry out resource reservation and context is stored for the terminal of access in order to the information in the handoff request signaling that in handoff procedure, sends according to the handoff request unit of source base station; With
The handoff response unit is packaged in the handoff response signaling in order to the result that will switch the reservation of access control element resources, sends to source base station.
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| CNA2006100348265A CN1859791A (en) | 2006-03-30 | 2006-03-30 | Method and system for realizing switching in radio communication network and its base station |
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