CN103607783A - CSFB (Circuit Switched Domain Fall Back) call establishment method and user equipment - Google Patents
CSFB (Circuit Switched Domain Fall Back) call establishment method and user equipment Download PDFInfo
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Abstract
The embodiment of the invention discloses a CSFB (Circuit Switched Domain Fall Back) call establishment method and user equipment, relating to the communication field, and being capable of realizing the dispatching priority of radio resource of CS (Circuit Switched) service in CSFB and reducing the establishment time delay of a CSFB call. The method provided by the embodiment of the invention comprises the steps that the user equipment judges whether a CSFB call flow is triggered by a voice service; if the user equipment judges that the CSFB call flow is triggered by the voice service and the user equipment has a data service request, the user equipment sends a CS domain resource request message to a first base station and delays to send a PS (Packet Switch) domain resource request message to the first base station, so that the first base station gives priority to dispatch CS domain radio resource to the voice service of the user equipment; after a predetermined condition is satisfied, the user equipment sends the PS domain resource request message to the first base station so that the first base station dispatches PS domain radio resource to the data service of the user equipment.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of CSFB call-establishing method and subscriber equipment.
Background technology
Circuit domain dropping (Circuit Switched Domain Fall Back, abbreviation CSFB) can realize subscriber equipment and can initiate the circuit switching such as voice (Circuit Switched under LTE access, be called for short CS) business, receive the paging of the CS business such as voice, and can be to terminal at Long Term Evolution (Long Term Evolution, abbreviation LTE) ongoing packet switching under system access (Packet Switch is called for short PS) business is correctly processed.In CSFB technology, two overlay areas at LTE and 2G/3G, to voice, location service (Location Services, be called for short LCS) and supplementary service, subscriber equipment can trigger from LTE access and return back to Generation Mobile Telecommunication System technology (2rd-generation, be called for short 2G)/3G (Third Generation) Moblie technology (3rd-generation is called for short 3G) network insertion carry out CS business.
CSFB has become operator in the common choice of technology of LTE deployment initial stage voice solution at present.Adopting CSFB to fall after rise to 2G/3G provides the scheme of speech business can make full use of conventional network resources, for user provides reliable, high-quality voice service.
But, in CSFB falling process of the prior art, for subscriber equipment, exist in the falling flow process of data service and speech business, generally speech business call setup and data service are continued and adopt random mode successively to process, but, if when preferentially carrying out data service and continuing, easily cause speech business call setup compared with long time delay, reduce user and experience.
Summary of the invention
The embodiment of the present invention provides a kind of CSFB call-establishing method and subscriber equipment, realizes the Radio Resource priority allocation of CS business in CSFB, reduces CSFB call establishment time delay.
To achieve these goals, the technical scheme that the embodiment of the present invention adopts is,
First aspect, provides a kind of CSFB call-establishing method, comprising:
Subscriber equipment judges whether CSFB call flow is triggered by speech business;
If described subscriber equipment determines that described CSFB call flow is to be triggered by speech business, and there is data service request in described subscriber equipment, described subscriber equipment sends CS territory resource request message to the first base station, and postpone to send PS territory resource request message to described the first base station, so that being preferably the speech business of described subscriber equipment, described the first base station distributes CS territory Radio Resource;
Meet pre-conditioned after, described subscriber equipment sends PS territory resource request message to described the first base station, so that the data service that described the first base station is described subscriber equipment distributes PS territory Radio Resource.
Second aspect, provides a kind of subscriber equipment, comprising:
Judge module, for judging whether CSFB call flow is triggered by speech business;
Request module, for determining that at described judge module described CSFB call flow is to be triggered by speech business, and while there is data service request in described subscriber equipment, to the first base station, send CS territory resource request message, and postpone to send PS territory resource request message to described the first base station, so that being preferably the speech business of described subscriber equipment, described the first base station distributes CS territory Radio Resource;
Meet pre-conditioned after, to described the first base station, send PS territory resource request message, so that the data service that described the first base station is described subscriber equipment distributes PS territory Radio Resource.
Therefore the embodiment of the present invention provides a kind of CSFB call-establishing method and subscriber equipment, subscriber equipment judges whether CSFB call flow is triggered by speech business; If described subscriber equipment determines that described CSFB call flow is to be triggered by speech business, and there is data service request in described subscriber equipment, described subscriber equipment sends CS territory resource request message to the first base station, and postpone to send PS territory resource request message to described the first base station, so that being preferably the speech business of described subscriber equipment, described the first base station distributes CS territory Radio Resource; Meet pre-conditioned after, described subscriber equipment sends PS territory resource request message to described the first base station, so that being preferably the data service of described subscriber equipment, described the first base station distributes CS territory Radio Resource, so that the data service that described the first base station is described subscriber equipment distributes PS territory Radio Resource.So, in CSFB call establishment, by subscriber equipment, controlled the priority of PS territory and CS territory Business Processing, make the Radio Resource priority allocation of CS business, avoid, because PS carries the extra time delay that priority allocation is brought, reducing CSFB call establishment time delay.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 provides a kind of schematic flow sheet of CSFB call-establishing method for the embodiment of the present invention;
The schematic flow sheet of the another kind of CSFB call-establishing method that Fig. 2 provides for the embodiment of the present invention;
The apparatus structure schematic diagram of a kind of subscriber equipment that Fig. 3 provides for the embodiment of the present invention;
The apparatus structure schematic diagram of the another kind of subscriber equipment that Fig. 4 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
On the one hand, the embodiment of the present invention provides a kind of CSFB call-establishing method, referring to Fig. 1, comprising:
101, subscriber equipment judges whether CSFB call flow is triggered by speech business;
Overlapping covered at LTE and 2G/3G network, when subscriber equipment accesses in LTE network, can trigger CSFB flow process, CSFB refers to that terminal is under LTE access, fall back to 2G/3G network, can make terminal fall back to 2G/3G network in the situation that of access LTE and initiate the CS business such as voice, receive the paging of the CS business such as voice, and can to terminal ongoing PS business under LTE access, correctly process at 2G/3G network.
Wherein, the multiple business of subscriber equipment can trigger CSFB flow process, for example, speech business, the unified display interface in CS territory (Unified Display Interface is called for short UDI) video traffic, LCS, unstructured supplementary service data (Unstructured Supplementary Service Data is called for short USSD), can trigger CSFB flow process.
The network side of LTE triggers after CSFB flow process at subscriber equipment, can send redirect message to subscriber equipment, comprises redirected frequency point information in this redirect message; Subscriber equipment according to the redirected frequency point information in redirect message can be redirected after network side set up Radio Resource and control (Radio Resource Control is called for short RRC) and connect.
The type of message of the triggering CSFB flow process that subscriber equipment can send by the network side to LTE determines whether the CSFB that speech business triggers, for example, if the service request information of the expansion that described CSFB flow process is sent by described subscriber equipment triggers, and in the service request information of described expansion, comprise CSFB indication, described subscriber equipment determines that described CSFB call flow is to be triggered by speech business.
If 102 described subscriber equipmenies determine that described CSFB call flow is to be triggered by speech business, and there is data service request in described subscriber equipment, described subscriber equipment sends CS territory resource request message to the first base station, and postpone to send PS territory resource request message to described the first base station, so that being preferably the speech business of described subscriber equipment, described the first base station distributes CS territory Radio Resource;
Wherein, the base station that RRC is connected can be set up with subscriber equipment in the first base station after being redirected.
If the existing speech business of subscriber equipment, also there is data service, after 2G/3G network is set up RRC, speech business and data service that user equipment requests 2G or 3G network side are respectively subscriber equipment distribute RAB (Radio Access Bearer, be called for short RAB) resource, but network side can only be taken up in order of priority as the speech business of subscriber equipment and data service distribution RAB resource, can not be that the data service of the speech business of subscriber equipment distributes RAB resource simultaneously.
In order to reduce the call delay of speech business as far as possible, subscriber equipment can arrange priority for speech business and the data service of itself, and the speech business that makes network side be preferably described subscriber equipment distributes CS territory Radio Resource.For example, if subscriber equipment determines that described CSFB call flow is to be triggered by speech business, and subscriber equipment exists data service request, subscriber equipment can send CS territory resource request message to the first base station, and postpones to send PS territory resource request message to the first base station.
103, meet pre-conditioned after, described subscriber equipment sends PS territory resource request message to described the first base station, so that the data service that described the first base station is described subscriber equipment distributes PS territory Radio Resource.
Preferably, describedly pre-conditionedly be: subscriber equipment receives the radio bearer that described the first base station sends and sets up message (Radio Bearer Setup) that the core network domain that wherein RAB information is set up list (RAB Information Setup List) is designated CS territory.
The radio bearer that receives described the first base station transmission when subscriber equipment is set up message, the core network domain that wherein RAB information is set up list is designated CS territory, illustrate that network side has started the flow process for user equipment allocation CS territory RAB resource, so, subscriber equipment can send PS territory resource request message to the first base station, so that the data service that the first base station is subscriber equipment distributes PS territory Radio Resource.
Therefore the embodiment of the present invention provides a kind of CSFB call-establishing method, subscriber equipment judges whether CSFB call flow is triggered by speech business; If described subscriber equipment determines that described CSFB call flow is to be triggered by speech business, and there is data service request in described subscriber equipment, described subscriber equipment sends CS territory resource request message to the first base station, and postpone to send PS territory resource request message to described the first base station, so that being preferably the speech business of described subscriber equipment, described the first base station distributes CS territory Radio Resource; Meet pre-conditioned after, described subscriber equipment sends PS territory resource request message to described the first base station, so that being preferably the data service of described subscriber equipment, described the first base station distributes CS territory Radio Resource, so that the data service that described the first base station is described subscriber equipment distributes PS territory Radio Resource.So, in CSFB call establishment, by subscriber equipment, controlled the priority of PS territory and CS territory Business Processing, make the Radio Resource priority allocation of CS business, avoid, because PS carries the extra time delay that priority allocation is brought, reducing CSFB call establishment time delay.
Below by specific embodiment, embodiment of the method shown in Fig. 1 is elaborated.First the scene of the present embodiment being set describes, and still, this scene is only for clearer explanation content of the present invention, for the present invention, does not constitute any limitation.In the application scenarios of setting in the present embodiment, suppose that subscriber equipment passes through CSFB by LTE network, fall back to 3G network, the first base station is the base station in 3G network, and the second base station is the base station in LTE network.
Referring to Fig. 2, can comprise the following steps:
201: subscriber equipment sends the service request information of expansion to the second base station, with circuits for triggering domain dropping CSFB flow process;
Wherein, subscriber equipment can send by following process the service request information of expansion to the second base station:
This message of service request information (Extended Service Request) that subscriber equipment sends expansion to mobile management entity (Mobile Managenment Entity is called for short MME) comprises " CSFB indication " (CS Fallback Indicator)." CSFB indication " is used to indicate MME and need to carries out CSFB process.
Preferably, subscriber equipment can only send the service request information of expansion in the following cases: used the EPS/IMSI attaching process of associating, carried out CS territory and adhered to, and can not initiate IMS voice conversation.
MME sends UE contextual modifications request message (UE Context Modification Request) to the second base station, wherein comprises " CSFB indication " (CS Fallback Indicator)." CSFB indication " is for moving to subscriber equipment GSM EDGE radio access network (GSM EDGE Radio Access Network to the second base station indication, be called for short GERAN) or UMTS Terrestrial radio access network (UMTS Terrestrial Radio Access Network is called for short UTRAN) network in.
The second base station is responded to MME by UE contextual modifications response UE Context Modification Response message.
Alternatively, the second base station can ask UE measurement report to carry out redirection process to determine which target GERAN/UTRAN community to MME, in the present embodiment, suppose that the base station that UE measurement report indicates the second base station to carry out redirection process ，Gai 3G community to one of them 3G community is the first base station.
202: subscriber equipment receives described the second base station and sends RRC connection release message, wherein, in described RRC connection release message, comprises redirected frequency point information;
Wherein, the second base station is determined behind redirection target community, can send RRC connection release message to subscriber equipment, in this RRC connection release message, comprises redirected frequency point information, for example, can be the frequency of Target cell.
203: subscriber equipment is set up RRC according to described redirected frequency point information with the second base station and is connected;
204: judge whether CSFB flow process is triggered by the service request information of expanding, and in the service request information of described expansion, comprise CSFB indication; If so, perform step 205, if not, perform step 208;
If judge, whether CSFB flow process is triggered by the service request information of expanding, and in the service request information of described expansion, comprises CSFB indication, and described subscriber equipment determines that described CSFB call flow is to be triggered by speech business.Otherwise, determine that CSFB call flow is not to have speech business to trigger.
205: if described subscriber equipment exists data service request, described subscriber equipment sends CS territory resource request message to the first base station, and postpone to send PS territory resource request message to described the first base station, so that being preferably the speech business of described subscriber equipment, described the first base station distributes CS territory Radio Resource;
If the existing speech business of subscriber equipment, also there is data service, in order to reduce the call delay of speech business as far as possible, speech business and data service that subscriber equipment is itself arrange priority, and the speech business that makes network side be preferably described subscriber equipment distributes CS territory Radio Resource.
Concrete, can realize by following manner: if subscriber equipment determines that described CSFB call flow is to be triggered by speech business, and there is data service request in subscriber equipment, subscriber equipment can send CS territory resource request message to the first base station, and postpones to send PS territory resource request message to the first base station.
For example, the form of CS territory resource request message can be CM service request (CM Service Request) message.
206: if subscriber equipment receives the radio bearer that described the first base station sends, set up message, the core network domain that wherein RAB information is set up list is designated CS territory, and subscriber equipment sends PS territory resource request message to described the first base station;
If subscriber equipment receives the radio bearer of described the first base station transmission and sets up message, wherein to set up the core network domain sign (cn-DomainIdentity) of list (rab-Information Setup List) be CS territory (cs-domain) to RAB information, illustrate that network side has started the flow process for user equipment allocation CS territory RAB resource, so, subscriber equipment can send PS territory resource request message to the first base station, so that the data service that the first base station is subscriber equipment distributes PS territory Radio Resource.For example, the form of PS territory resource request message can be service request (Service Request) message.
207: described subscriber equipment receives described the first base station radio carrying and sets up message, the core network domain that wherein RAB information is set up list is designated PS territory;
208: by normal procedure, access.
If CSFB flow process is not to be triggered by speech business, subscriber equipment can access by normal procedure, without delayed delivery PS territory resource request message.
Therefore the embodiment of the present invention provides a kind of CSFB call-establishing method, subscriber equipment judges whether CSFB call flow is triggered by speech business; If described subscriber equipment determines that described CSFB call flow is to be triggered by speech business, and there is data service request in described subscriber equipment, described subscriber equipment sends CS territory resource request message to the first base station, and postpone to send PS territory resource request message to described the first base station, so that being preferably the speech business of described subscriber equipment, described the first base station distributes CS territory Radio Resource; Meet pre-conditioned after, described subscriber equipment sends PS territory resource request message to described the first base station, so that being preferably the data service of described subscriber equipment, described the first base station distributes CS territory Radio Resource, so that the data service that described the first base station is described subscriber equipment distributes PS territory Radio Resource.So, in CSFB call establishment, by subscriber equipment, controlled the priority of PS territory and CS territory Business Processing, make the Radio Resource priority allocation of CS business, avoid, because PS carries the extra time delay that priority allocation is brought, reducing CSFB call establishment time delay.
On the one hand, the embodiment of the present invention provides a kind of apparatus structure schematic diagram of subscriber equipment 30, and as shown in Figure 3, this subscriber equipment 30 can comprise:
Further, referring to Fig. 4, described subscriber equipment 30 also comprises:
Sending module 303, for send the service request information of expansion to the second base station, with circuits for triggering domain dropping CSFB flow process;
Further, described judge module 301 specifically for:
If the service request information of the expansion that described CSFB flow process is sent by described subscriber equipment triggers, and in the service request information of described expansion, comprise CSFB indication, determine that described CSFB call flow is to be triggered by speech business.
Preferably, be describedly pre-conditionedly: described receiver module receives the radio bearer that described the first base station sends and sets up message that the core network domain that wherein RAB information is set up list is designated CS territory.
Therefore the embodiment of the present invention provides a kind of subscriber equipment 30, subscriber equipment judges whether CSFB call flow is triggered by speech business; If described subscriber equipment determines that described CSFB call flow is to be triggered by speech business, and there is data service request in described subscriber equipment, described subscriber equipment sends CS territory resource request message to the first base station, and postpone to send PS territory resource request message to described the first base station, so that being preferably the speech business of described subscriber equipment, described the first base station distributes CS territory Radio Resource; Meet pre-conditioned after, described subscriber equipment sends PS territory resource request message to described the first base station, so that being preferably the data service of described subscriber equipment, described the first base station distributes CS territory Radio Resource, so that the data service that described the first base station is described subscriber equipment distributes PS territory Radio Resource.So, in CSFB call establishment, by subscriber equipment, controlled the priority of PS territory and CS territory Business Processing, make the Radio Resource priority allocation of CS business, avoid, because PS carries the extra time delay that priority allocation is brought, reducing CSFB call establishment time delay.
Finally it should be noted that: above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (8)
1. a circuit domain dropping CSFB call-establishing method, is characterized in that, comprising:
Subscriber equipment judges whether CSFB call flow is triggered by speech business;
If described subscriber equipment determines that described CSFB call flow is to be triggered by speech business, and there is data service request in described subscriber equipment, described subscriber equipment sends CS territory resource request message to the first base station, and postpone to send PS territory resource request message to described the first base station, so that being preferably the speech business of described subscriber equipment, described the first base station distributes CS territory Radio Resource;
Meet pre-conditioned after, described subscriber equipment sends PS territory resource request message to described the first base station, so that the data service that described the first base station is described subscriber equipment distributes PS territory Radio Resource.
2. method according to claim 1, is characterized in that, at described subscriber equipment, judges whether CSFB call flow is triggered by speech business, and before, described method also comprises:
Subscriber equipment sends the service request information of expansion to the second base station, with circuits for triggering domain dropping CSFB flow process;
Described subscriber equipment receives the redirect message that described the second base station sends, and wherein, comprises redirected frequency point information in described redirect message;
Described subscriber equipment is set up RRC according to the redirected frequency point information in described redirect message with the first base station and is connected.
3. method according to claim 2, is characterized in that, described subscriber equipment judges that whether described CSFB call flow is triggered by speech business, comprising:
If the service request information of the expansion that described CSFB flow process is sent by described subscriber equipment triggers, and in the service request information of described expansion, comprise CSFB indication, described subscriber equipment determines that described CSFB call flow is to be triggered by speech business.
4. according to the method described in claim 1-3 any one, it is characterized in that, describedly pre-conditionedly be: described subscriber equipment receives the radio bearer that described the first base station sends and sets up message that the core network domain that wherein RAB information is set up list is designated CS territory.
5. a subscriber equipment, is characterized in that, comprising:
Judge module, for judging whether CSFB call flow is triggered by speech business;
Request module, for determining that at described judge module described CSFB call flow is to be triggered by speech business, and while there is data service request in described subscriber equipment, to the first base station, send CS territory resource request message, and postpone to send PS territory resource request message to described the first base station, so that being preferably the speech business of described subscriber equipment, described the first base station distributes CS territory Radio Resource;
Meet pre-conditioned after, to described the first base station, send PS territory resource request message, so that the data service that described the first base station is described subscriber equipment distributes PS territory Radio Resource.
6. subscriber equipment according to claim 5, is characterized in that, described subscriber equipment also comprises:
Sending module, for send the service request information of expansion to the second base station, with circuits for triggering domain dropping CSFB flow process;
Receiver module, the redirect message sending for receiving described the second base station, wherein, comprises redirected frequency point information in described redirect message;
Module is set up in RRC connection, for setting up RRC according to the redirected frequency point information of described redirect message with the first base station, is connected.
7. subscriber equipment according to claim 6, is characterized in that, described judge module specifically for:
If the service request information of the expansion that described CSFB flow process is sent by described subscriber equipment triggers, and in the service request information of described expansion, comprise CSFB indication, determine that described CSFB call flow is to be triggered by speech business.
8. according to the subscriber equipment described in claim 5-7 any one, it is characterized in that, describedly pre-conditionedly be: described receiver module receives the radio bearer that described the first base station sends and sets up message that the core network domain that wherein RAB information is set up list is designated CS territory.
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