CN103517325A - Method and system for selecting network priority - Google Patents
Method and system for selecting network priority Download PDFInfo
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- CN103517325A CN103517325A CN201210222806.6A CN201210222806A CN103517325A CN 103517325 A CN103517325 A CN 103517325A CN 201210222806 A CN201210222806 A CN 201210222806A CN 103517325 A CN103517325 A CN 103517325A
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Abstract
The invention discloses a method for selecting network priority. According to the method, when PS is congested, CS is not congested, and UE lingered on E-UTRAN needs to start a CS service, the network side of the E-UTRAN updates RFSP or SPID, and the RFSP or the SPID is applied to own cell reselection strategies. The UE reselects the GERAN or the UTRAN and indicates PS congestion. The network side of the GERAN or the network side of the UTRAN starts an MT service or the UE restart the CS service. The network side of the GERAN or the network side of the UTRAN applies the RFSP or the SPID to the own cell reselection strategies, when the MT service or the CS service is finished, the UE continues to linger on the GERAN or the UTRAN until the PS congestion is relieved, and the UE returns the E-UTRAN. The invention further discloses a system for selecting the network priority, and the system for selecting the network priority can achieve the CS service of the UE and the MT service of the network side when the PS is congested and the CS is not congested.
Description
Technical field
The present invention relates to wireless communication technology, refer to especially a kind of method and system of selecting network priority.
Background technology
Machine refers to machine (M2M, Machine to Machine) technology all technology and the means that between machine, connect.The machine quantity in the whole world is much more a lot of than people's quantity at present, therefore can predict the good market prospects of M2M technology.
In order to effectively utilize mobile network resource, third generation partner program (3GPP, 3rd Generation Partnership Project) machine type communication (MTC has been proposed, Machine Type Communication), comprise M2M, the business that machine carries out communication to people (Machine to Man), its scope of business is far beyond Human To Human (H2H in the past, Human to Human) communication between, MTC is in access control, charging, fail safe, service quality (QoS, Quality of Service), the aspects such as business model and present H2H communication mode make a big difference.
As shown in Figure 1,3GPP evolved packet system (EPS, Evolved Packet System) comprised that wireless access network is (as universal mobile telecommunications system (UMTS) land radio access web (UTRAN, Universal Terrestrial Radio Access Network), the UTRAN (E-UTRAN of evolution, global system for mobile communications/enhanced data rates for gsm evolution (GSM/EDGE) Radio Access Network (GERAN, GSM/EDGE Radio Access Network)) and core net Evolved UTRAN).Packet-based core networks (EPC in evolution, Evolved Packet Core) in, there is mobile management entity (MME, Mobility Management Entity), gateway (SG, Serving Gateway), the gateway (PGW of Packet Data Network (PDN), PDN Gateway), the network element such as home subscriber server (HSS, Home Subscriber Server); In GPRS core net, comprise the network elements such as Serving GPRS Support Node (SGSN, Serving GPRS Support Node); At E-UTRAN, comprise the Node B (eNB, evolved Node B) of evolution.
Subscriber equipment or claim that terminal (UE) can be in one of following two states: a kind of is RRC connected state (RRC_CONNECTED, referred to as connected state); Another kind is RRC Idle state (RRC_IDLE, referred to as Idle state), UE in Idle state does not set up Radio Resource with network side and controls (RRC, Radio Resources Control) connection, and the UE in connected state has set up RRC with network side and has been connected.
UE can be registered to evolved packet system (EPS, Evolved Packet System) service and non-evolved packet system (non EPS) service simultaneously, and this is called to combine and adheres to.Combine the UE adhering to and have two kinds of operator schemes: circuit switched/packet switched (CS/PS, Circuit Switched/Packet Switched) pattern l and CS/PS pattern 2, CS/PS pattern 1 time, UE purposes is that voice are main " voice centric ", CS/PS pattern 2 times, UE purposes is that data are main " data centric ".
The enormous amount of MTC subscriber equipment, therefore may cause network congestion, for fear of network congestion, has proposed to adopt the mechanism of the time that retreats in 3GPP, comprises that session management retreats timer and mobile management retreats timer.Retreat timer and generally by network side, adopt Non-Access Stratum (NAS, Non Access Stratum) signaling, in refuse information, send to UE; Described MTC subscriber equipment is the UE with MTC function.
Under general congestion scenario, MME produces and moves and retreats timer (back-off Timer), and refusal is from the mobile management signaling request of UE.Except high-priority users, emergency services (Emergency Services) and Mobile terminating call service (Mobile Terminated Services) business, UE should not initiate the mobile management message of other business.
RRM (RRM, Radio Resource Management) refer to by wireless access network (RAN, Radio Access Network) correlation function to the distribution of wireless communications path and maintenance completing, the RRM strategy that network side adopts can be selected according to the customizing messages of UE.
MME/SGSN is from home subscriber server (HSS, Home Subscriber Server) obtain wireless access technology/frequency of selection priority (RFSP of UE, RAT/Frequency Selection Priority) index information, MME/SGSN notifies corresponding eNB/ base station controller (BSC by RFSP value, Base Station Controller)/radio network controller (RNC, Radio Network Controller), eNB/BSC/RNC (is called user file sign (SPID by RFSP index information in RAN, Subscriber Profile ID for RAT/frequency priority)) be applied in RRM strategy, as be applied in cell reselection priority setting and cell switch process.Fig. 2 has provided MME/SGSN and to eNB/BSC/RNC, has sent the schematic diagram of RFSP index information.
MME/SGSN can be according to the specific information selecting RFSP index value of the local policy of the RFSP information of receiving from HSS, operator (RFSP using as MME/SGSN), network state and UE, i.e. SPID, and SPID value is 1-256, wherein:
1-128, represents the specific SPID value of operator;
129-256, represents with reference to use value.
The precedence information of the different corresponding heterogeneous networks of SPID value, the precedence information that equals 256 correspondences for SPID value as shown in table 1 is: the carrier wave priority of E-UTRAN is high (high), the carrier wave priority of UTRAN be in (medium), the carrier wave priority of GERAN is low (low).
SPID＝256
Table 1
Congested in order to distinguish the congested and CS of PS, core net adopts the different set timers that retreats, and PS retreats timer (PS back-off timer) and CS retreats timer (CS back-off timer).3GPP stipulates at present: if PS back-off timer operation, and CS back-off timer stops, be that PS is congested, CS is not congested, and Idle state UE resides in E-UTRAN, and UE need to initiate the service that CS is relevant, as voice or short message service (SMS, Short Message Service), now UE can gravity treatment arrive GERAN or UTRAN, at GERAN or UTRAN, initiates CS service.
In the research and practice process to prior art, find that prior art exists following problem: PS is congested, when CS is not congested, the UE that resides in E-UTRAN can not initiate CS request; Or UE finishes in the service of GERAN or UTRAN, after returning to idle mode, adopt normal cell reselection, UE may gravity treatment go back to E-UTRAN community like this, and PS in E-UTRAN is congested, does not also remove, and UE can not initiate the renewal of adhere to/position in E-UTRAN, UE also just cannot receive MT service, like this, may between GERAN or UTRAN and E-UTRAN, there is ping-pong, cause UE power consumption to increase and affect user experiencing.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method and system of selecting network priority, avoids because PS is congested, causing can not normally initiating between network side and UE the problem of service.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of method of selecting network priority provided by the invention, the method comprises:
When the UE that PS is congested, CS is not congested and reside in E-UTRAN need to initiate CS service, the network side of E-UTRAN upgrades RFSP or SPID, and described RFSP or SPID are applied to the cell reselection strategy in self RRM strategy;
UE arrives GERAN or UTRAN according to the gravity treatment of described cell reselection strategy, and exists PS congested to described GERAN or UTRAN indication E-UTRAN;
The network side of GERAN or UTRAN initiates MT service or UE initiates CS service again;
The network side of GERAN or UTRAN upgrades RFSP or SPID, and described RFSP or SPID are applied to the cell reselection strategy in self RRM strategy, when described MT service or CS service end, UE continues to reside in GERAN or UTRAN according to described cell reselection strategy, until PS relieve congestion, described UE returns to E-UTRAN.
In such scheme, it is described when the UE that PS is congested, CS is not congested and reside in E-UTRAN need to initiate CS service, the network side of E-UTRAN upgrades RFSP or SPID, for: the network side of E-UTRAN retreats timer operation according to PS, CS retreats timer and does not move, determine that PS is congested, CS not congested after, when the UE that resides in E-UTRAN need to initiate CS service, in the network side of E-UTRAN, mobile management entity (MME) is determined renewal RFSP or SPID, and select GERAN or UTRAN preferential, the RFSP that E-UTRAN takes second place or SPID.
In such scheme, described MME determines that renewal RFSP or SPID are: described MME is according to the signing RFSP or the SPID that receive from home subscriber server (HSS), and/or operator's local policy and network state, and/or the contextual information of UE in MME or Serving GPRS Support Node (SGSN) judges whether to upgrade RFSP or SPID, wherein, when the RFSP of the signing RFSP receiving from HSS or SPID and current use or SPID are when inconsistent, and/or provide new RFSP/SPID or operator is local while selecting new RRM strategy when operator, and/or when network state changes, and/or when comprising UE purposes arranging in adhering to/position updating request of UE, described MME determines renewal RFSP or SPID.
In such scheme, the cell reselection strategy that the network side of described E-UTRAN is applied to described RFSP or SPID in RRM strategy is: the network side of described E-UTRAN also comprises enode b (eNB), described MME notifies described eNB by the RFSP of selection or SPID, and described eNB is applied to the cell reselection strategy in local RRM strategy by described RFSP or SPID.
In such scheme, the network side of described GERAN or UTRAN upgrades RFSP or SPID is: in the network side of described GERAN or UTRAN, core net determines and upgrade RFSP or SPID, and select GERAN or UTRAN preferential, the RFSP that E-UTRAN takes second place or SPID; Described core net comprises mobile switching centre (MSC) or SGSN.
In such scheme, the cell reselection strategy that the network side of described GERAN or UTRAN is applied to described RFSP or SPID in self RRM strategy is: the network side of described GERAN or UTRAN also comprises Access Network, described core net is notified described Access Network by the RFSP of selection or SPID, and described Access Network is applied to the cell reselection strategy in local RRM strategy by described RFSP or SPID; Described Access Network comprises: the eNB of described GERAN or UTRAN or base station controller (BSC) or radio network controller (RNC).
In such scheme, the method also comprises: described MME notifies described core net by S3 interface by the RFSP of selection or SPID, and described core net is notified described Access Network by Gb Interface or Iu interface.
In such scheme, described PS relieve congestion is: the PS of UE side retreats that timer stops or expiring, and it is T3346 that described PS retreats timer.
In such scheme, described UE returns to E-UTRAN and is: described UE combines and adheres to or combine tracking area update at E-UTRAN.
A kind of system of selecting network priority provided by the invention, this system comprises: first network side, second network side and UE, wherein,
First network side, for need to initiate CS service as the UE that PS is congested, CS is not congested and reside in E-UTRAN time, upgrades RFSP or SPID, and described RFSP or SPID are applied to the cell reselection strategy in self RRM strategy;
Second network side, for upgrading RFSP or SPID, and is applied to the cell reselection strategy in self RRM strategy by described RFSP or SPID;
UE, for arriving GERAN or UTRAN according to the cell reselection strategy gravity treatment of first network side, exists PS congested to described GERAN or UTRAN indication E-UTRAN; And the CS again initiating at self serves or the described MT of second network side initiation serves while finishing, and continues to reside in GERAN or UTRAN, until PS relieve congestion returns to E-UTRAN according to the cell reselection strategy of second network side.
In such scheme, described first network side comprises: the eNB of MME, E-UTRAN, wherein,
Described MME, for need to initiate CS service as the UE that PS is congested, CS is not congested and reside in E-UTRAN time, determine renewal RFSP or SPID, and select GERAN or UTRAN preferential, the RFSP that E-UTRAN takes second place or SPID, notify described eNB by the RFSP of selection or SPID;
Described eNB, for being applied to described RFSP or SPID the cell reselection strategy of local RRM strategy.
In such scheme, described second network side comprises: core net and Access Network, wherein,
Described core net, for receiving that E-UTRAN exists after the congested indication of PS, determine to upgrade RFSP or SPID, and select GERAN or UTRAN preferential, the RFSP that E-UTRAN takes second place or SPID, by described RFSP or SPID notice Access Network;
Described Access Network, for being applied to described RFSP or SPID the cell reselection strategy of local RRM strategy.
In such scheme, described core net comprises MSC or SGSN;
Described Access Network comprises: the eNB of described GERAN or UTRAN or BSC or RNC.
The invention provides a kind of method and system of selecting network priority, when the UE that PS is congested, CS is not congested and reside in E-UTRAN need to initiate CS service, the network side of E-UTRAN upgrades RFSP or SPID, and described RFSP or SPID are applied to the cell reselection strategy in self RRM strategy; UE arrives GERAN or UTRAN according to the gravity treatment of described cell reselection strategy, and exists PS congested to described GERAN or UTRAN indication E-UTRAN; The network side of GERAN or UTRAN initiates MT service or UE initiates CS service again; The network side of GERAN or UTRAN upgrades RFSP or SPID, and described RFSP or SPID are applied to the cell reselection strategy in self RRM strategy, when described MT service or CS service end, UE continues to reside in GERAN or UTRAN according to described cell reselection strategy, until PS relieve congestion, described UE returns to E-UTRAN.So, when network exists the congested and CS of PS not congested, can realize the CS service of UE and the MT service of network side.
Accompanying drawing explanation
Fig. 1 is the configuration diagram of 3GPP evolved packet system in prior art;
Fig. 2 is that in prior art, MME/SGSN sends the schematic diagram of RFSP index information to eNB/BSC/RNC;
Fig. 3 is the schematic flow sheet of the method for selection network priority provided by the invention;
Fig. 4 is the structural representation of the system of selection network priority provided by the invention;
The schematic flow sheet of the method for the selection network priority that Fig. 5 provides for the embodiment of the present invention one;
The schematic flow sheet of the method for the selection network priority that Fig. 6 provides for the embodiment of the present invention two.
Embodiment
Basic thought of the present invention is: when the UE that PS is congested, CS is not congested and reside in E-UTRAN need to initiate CS service, the network side of E-UTRAN upgrades RFSP or SPID, and described RFSP or SPID are applied to the cell reselection strategy in self RRM strategy; UE arrives GERAN or UTRAN according to the gravity treatment of described cell reselection strategy, and exists PS congested to described GERAN or UTRAN indication E-UTRAN; The network side of GERAN or UTRAN initiates MT service or UE initiates CS service again; The network side of GERAN or UTRAN upgrades RFSP or SPID, and described RFSP or SPID are applied to the cell reselection strategy in self RRM strategy, when described MT service or CS service end, UE continues to reside in GERAN or UTRAN according to described cell reselection strategy, until PS relieve congestion, described UE returns to E-UTRAN.
Below by drawings and the specific embodiments, the present invention is described in further detail.
The present invention realizes a kind of method of selecting network priority, and as shown in Figure 3, the method comprises following step:
Step 101: when the UE that PS is congested, CS is not congested and reside in E-UTRAN need to initiate CS service, the network side of E-UTRAN upgrades RFSP or SPID;
Concrete, the network side of E-UTRAN moves according to PS back-off timer, CS back-off timer does not move, determine that PS is congested, CS not congested after, when the UE that resides in E-UTRAN need to initiate CS service, in the network side of E-UTRAN, MME determines renewal RFSP or SPID, and select GERAN or UTRAN preferential, the RFSP that E-UTRAN takes second place or SPID, for example: select SPID=255 or SPID=254; Wherein, the precedence information that SPID=255 is corresponding is as shown in table 2, for: the carrier wave priority of UTRAN is high (high), the carrier wave priority of GERAN be in (medium), the carrier wave priority of E-UTRAN is low (low); The precedence information that SPID=254 is corresponding is as shown in table 3, for: the carrier wave priority of GERAN is high (high), the carrier wave priority of UTRAN be in (medium), the carrier wave priority of E-UTRAN is low (low).
Table 2
Table 3
Described MME determines that renewal RFSP or SPID are: described MME is according to the signing RFSP or the SPID that receive from HSS, and/or operator's local policy and network state, and/or the contextual information of UE in MME or SGSN judges whether to upgrade RFSP or SPID, wherein, when the RFSP of the signing RFSP receiving from HSS or SPID and current use or SPID are when inconsistent, and/or provide new RFSP/SPID or operator is local while selecting new RRM strategy when operator, and/or when network state changes, and/or when comprising UE purposes arranging in adhering to/position updating request of UE, described MME determines renewal RFSP or SPID, here, described HSS and SGSN belong to the network side of GERAN or UTRAN.
Described network state change comprises that the situations such as current network configuration, load change, as network occurs that PS is congested, CS is not congested, or PS relieve congestion etc.; Described network occurs that PS is congested, CS is not congested, for: the PS back-off timer operation of network side, CS back-off timer does not move; Described PS relieve congestion is: the PS back-off timer of network side stops or be overtime;
Described UE purposes arranges as preferential in CS voice, and PS voice take second place etc.
This step also comprises: described MME is definite does not upgrade RFSP or SPID, and UE normally carries out cell reselection at E-UTRAN, and flow process finishes.
The network side of step 102:E-UTRAN is applied to the cell reselection strategy in self RRM strategy by described RFSP or SPID;
Concrete, the network side of described E-UTRAN also comprises the eNB of E-UTRAN, and described MME notifies described eNB by the RFSP of selection or SPID, and described eNB is applied to the cell reselection strategy in local RRM strategy by described RFSP or SPID;
Describedly by the RFSP of selection or SPID, notifying described eNB, is generally that signaling is carried described RFSP or SPID sends to described eNB by upgrading.
Step 103:UE arrives GERAN or UTRAN according to the gravity treatment of described cell reselection strategy, and exists PS congested to described GERAN or UTRAN indication E-UTRAN;
The network side of step 104:GERAN or UTRAN initiates MT service or UE initiates CS service again;
The network side of step 105:GERAN or UTRAN upgrades RFSP or SPID;
Concrete, in the network side of described GERAN or UTRAN, core net determines and upgrades RFSP or SPID, and select GERAN or UTRAN preferential, the RFSP that E-UTRAN takes second place or SPID;
Described core net comprises MSC or SGSN.
The network side of step 106:GERAN or UTRAN is applied to the cell reselection strategy in self RRM strategy by described RFSP or SPID, when described MT service or CS service end, UE continues to reside in GERAN or UTRAN according to described cell reselection strategy, until PS relieve congestion, described UE returns to E-UTRAN;
Concrete, the network side of described GERAN or UTRAN also comprises Access Network, core net is notified described Access Network by the RFSP of selection or SPID, described Access Network is applied to the cell reselection strategy in local RRM strategy by described RFSP or SPID, when described MT service or CS service end, UE continues to reside in GERAN or UTRAN according to described cell reselection strategy, until PS relieve congestion, described UE returns to E-UTRAN.
Described Access Network comprises: the eNB of described GERAN or UTRAN or BSC or RNC.
Described PS relieve congestion generally refers to that the PS of UE side retreats that timer stops or expiring, and it is T3346 that described PS retreats timer.
Described UE return E-UTRAN generally refer to described UE at E-UTRAN, combine adhere to (combined attach) or associating tracking area update (combined TAU).
Said method also comprises: described MME notifies described core net by S3 interface by the RFSP of selection or SPID, and described core net is notified described Access Network by Gb Interface or Iu interface.
Said method also comprises: when PS relieve congestion, the network side of described GERAN or UTRAN upgrades RFSP or SPID again, and described RFSP or SPID are applied to self RRM strategy; UE carries out cell reselection according to described cell reselection strategy.
In order to realize said method, the present invention also provides a kind of system of selecting network priority, and as shown in Figure 4, this system comprises: first network side 41, second network side 42 and UE 43, wherein,
The network side that described first network side 41 is E-UTRAN; Described second network side 42 is the network side of GERAN or UTRAN;
First network side 41, for need to initiate CS service as the UE 43 that PS is congested, CS is not congested and reside in E-UTRAN time, upgrades RFSP or SPID, and described RFSP or SPID are applied to the cell reselection strategy in self RRM strategy;
UE 43, for arriving GERAN or UTRAN according to the cell reselection strategy gravity treatment of first network side 41, to described GERAN or UTRAN indication E-UTRAN, exist PS congested; And the CS again initiating at self serves or the described MT of second network side 42 initiations serves while finishing, and continues to reside in GERAN or UTRAN, until PS relieve congestion returns to E-UTRAN according to the cell reselection strategy of second network side 42.
Described first network side 41 comprises: the eNB 412 of MME 411, E-UTRAN, wherein,
Described MME 411, for need to initiate CS service as the UE that PS is congested, CS is not congested and reside in E-UTRAN time, determine renewal RFSP or SPID, and select GERAN or UTRAN preferential, the RFSP that E-UTRAN takes second place or SPID, notify described eNB 412 by the RFSP of selection or SPID;
Described eNB 412, for being applied to described RFSP or SPID the cell reselection strategy of local RRM strategy;
Described second network side 42 comprises: core net 421 and Access Network 422, wherein,
Described core net 421, for receiving that E-UTRAN exists after the congested indication of PS, determine to upgrade RFSP or SPID, and select GERAN or UTRAN preferential, the RFSP that E-UTRAN takes second place or SPID, by described RFSP or SPID notice Access Network 422;
Described Access Network 422, for being applied to described RFSP or SPID the cell reselection strategy of local RRM strategy;
Described core net 421 comprises MSC or SGSN 4211;
Described Access Network 422 comprises: the eNB of described GERAN or UTRAN or BSC or RNC4221.
Below in conjunction with specific embodiment, describe implementation procedure and the principle of method of the present invention in detail.
Embodiment mono-
The scene of the present embodiment is: UE resides in E-UTRAN, UE sends CS service request information to the network side of E-UTRAN, and network occurs that PS is congested, and CS is not congested, be the PS back-off timer T3346 operation of the network side of E-UTRAN, CS back-off timer T3246 does not move; The present embodiment is realized a kind of method of selecting network priority, and as shown in Figure 5, the method comprises the following steps:
Step 201:UE sends CS service request information to the network side of E-UTRAN.
Described CS service request comprises: CS falls the service requests such as (CSFB, CS FallBack), SMS, CS voice Voice after rise.
The network side of step 202:E-UTRAN sends refusal response message to UE, and carries congested indication in refusal response message;
Described refusal response message is connection refused message;
The sign that described congested indication comprises PS back-off timer, is T3346, shows that PS is congested;
Here, not operation of T3246.
The network side of step 203:E-UTRAN judges whether to upgrade RFSP or SPID, if so, performs step 204, otherwise performs step 210;
Concrete, the network side of E-UTRAN comprises MME, described MME is according to the signing RFSP or the SPID that receive from HSS, and/or operator's local policy and network state, and/or the contextual information of UE in MME or SGSN judges whether to upgrade RFSP or SPID, wherein, when the RFSP of the signing RFSP receiving from HSS or SPID and current use or SPID are when inconsistent, and/or provide new RFSP/SPID or operator is local while selecting new RRM strategy when operator, and/or when network state changes, and/or when comprising UE purposes arranging in adhering to/position updating request of UE, execution step 204, otherwise perform step 210,
Described network state change comprises that the situations such as current network configuration, load change, and as network occurs that PS is congested, CS is not congested, or PS relieve congestion etc.; Described network occurs that PS is congested, and CS is not congested, for: the PS back-off timer operation of network side, CS back-off timer does not move; Described PS relieve congestion is: the PS back-off timer of network side stops or be overtime;
Unless it is pointed out that operator formulates corresponding RFSP or SPID or RRM strategy, otherwise according to network state, performed step 204.
The network side of step 204:E-UTRAN upgrades RFSP or SPID;
Concrete, MME selection GERAN or UTRAN are preferential, the RFSP that E-UTRAN takes second place or SPID;
The network side of step 205:E-UTRAN is applied to the cell reselection strategy in self RRM strategy by described RFSP or SPID;
Concrete, the network side of described E-UTRAN also comprises the eNB of E-UTRAN, and described MME notifies described eNB by the RFSP of selection or SPID, and described eNB is applied to the cell reselection strategy in local RRM strategy by described RFSP or SPID.
Step 206:UE cell reselection is to GERAN or UTRAN, and the network side to GERAN or UTRAN sends CS service request information again;
The MME of the network side of step 207:E-UTRAN is by the SGSN of the network side of the RFSP selecting or SPID notice GERAN or UTRAN, SGSN notice BSC or RNC;
Concrete described MME is by S3 interface by the RFSP selecting or SPID notice SGSN, and described SGSN passes through Iu interface notice RNC by described RFSP or SPID, by Gb Interface, notifies BSC.
Step 208:BSC or RNC are applied to local RRM strategy by the RFSP receiving or SPID;
Concrete, BSC or RNC receive after RFSP or SPID, the cell reselection priority that described RFSP or SPID are applied to local RRM strategy set and handoff procedure among.
Step 209:UE is after the current CS service of the little end of extent of gravity treatment, and UE continues to reside in GERAN or UTRAN, and flow process finishes;
Step 210:UE resides in E-UTRAN, adopts normal cell reselection process;
Concrete, described UE resides in E-UTRAN, until receive the relieve congestion indication of network side, UE initiates required CS service request to network side again.
Embodiment bis-
The scene of the present embodiment is: UE carries out CS service at GERAN or UTRAN, and network occurs that PS is congested, and CS is not congested, i.e. the PS back-off timer T3346 of network side operation, and CS back-off timerT3246 does not move; The present embodiment is realized a kind of method of selecting network priority, and as shown in Figure 6, the method comprises the following steps:
Step 301:UE sends CS service request information to the network side of E-UTRAN.
Described CS service request comprises: the service requests such as CS falling, SMS, CS voice Voice.
The network side of step 302:E-UTRAN sends refusal response message to UE, and carries congested indication in refusal response message;
Described refusal response message is connection refused message;
The sign that described congested indication comprises PS back-off timer, is T3346, shows that PS is congested;
Here, not operation of T3246.
The network side of step 303:E-UTRAN upgrades RFSP or SPID;
Concrete, the network side of described E-UTRAN comprises MME, described MME selection GERAN or UTRAN are preferential, the RFSP that E-UTRAN takes second place or SPID;
The network side of step 304:E-UTRAN is applied to the cell reselection strategy in self RRM strategy by described RFSP or SPID;
Concrete, the network side of described E-UTRAN also comprises the eNB of E-UTRAN, and described MME notifies described eNB by the RFSP of selection or SPID, and described eNB is applied to the cell reselection strategy in local RRM strategy by described RFSP or SPID.
Step 305:UE cell reselection is to GERAN or UTRAN, and exists PS congested to described GERAN or UTRAN indication E-UTRAN;
The described UE of being designated as gravity treatment sends during to GERAN or UTRAN; It is pointed out that if having interface between E-UTRAN and GERAN or UTRAN, as SGs interface, E-UTRAN also can send the congested indication information of PS by above-mentioned interface.
The network side of step 306:GERAN or UTRAN is initiated MT service;
The network side of step 307:GERAN or UTRAN upgrades RFSP or SPID;
In the network side of described GERAN or UTRAN, core net determine to be upgraded RFSP or SPID, and select GERAN or UTRAN preferential, the RFSP that E-UTRAN takes second place or SPID;
Described core net comprises MSC or SGSN.
The network side of step 308:GERAN or UTRAN is applied to the cell reselection strategy in self RRM strategy by described RFSP or SPID, and when described MT service finishes, UE continues to reside in GERAN or UTRAN according to described cell reselection strategy;
Concrete, the network side of described GERAN or UTRAN also comprises Access Network, described core net is notified described Access Network by the RFSP of selection or SPID, described Access Network is applied to the cell reselection strategy in local RRM strategy by described RFSP or SPID, when described MT service finishes, UE continues to reside in GERAN or UTRAN according to described cell reselection strategy;
Described Access Network comprises: the eNB of described GERAN or UTRAN or BSC or RNC.
The network side of step 309:GERAN or UTRAN judges whether T3346 stops or is overtime, if so, performs step 311, otherwise perform step 310;
Step 310:UE continues to reside in GERAN or UTRAN, adopts normal cell reselection process, and flow process finishes;
Step 311: reside in the UE cell reselection of GERAN or UTRAN to E-UTRAN.
The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention.
Claims (13)
1. a method of selecting network priority, is characterized in that, the method comprises:
When the subscriber equipment (UE) that packet switching (PS) is congested, circuit switching (CS) is not congested and reside in the universal mobile telecommunications system land radio access web (E-UTRAN) of evolution need to be initiated CS service, the network side of E-UTRAN upgrades wireless access technology/frequency of selection priority (RFSP) or user file sign (SPID), and described RFSP or SPID are applied to the cell reselection strategy in self RRM (RRM) strategy;
UE arrives global system for mobile communications/enhanced data rates for gsm evolution Radio Access Network (GERAN) or universal mobile telecommunications system land radio access web (UTRAN) according to the gravity treatment of described cell reselection strategy, and exists PS congested to described GERAN or UTRAN indication E-UTRAN;
The network side of GERAN or UTRAN initiates MT service or UE initiates CS service again;
The network side of GERAN or UTRAN upgrades RFSP or SPID, and described RFSP or SPID are applied to the cell reselection strategy in self RRM strategy, when described MT service or CS service end, UE continues to reside in GERAN or UTRAN according to described cell reselection strategy, until PS relieve congestion, described UE returns to E-UTRAN.
2. method according to claim 1, it is characterized in that, described when PS congested, CS is not congested, and when the UE that resides in E-UTRAN need to initiate CS service, the network side of E-UTRAN upgrades RFSP or SPID, for: the network side of E-UTRAN retreats timer operation according to PS, CS retreats timer and does not move, determine that PS is congested, after CS is not congested, when the UE that resides in E-UTRAN need to initiate CS service, in the network side of E-UTRAN, mobile management entity (MME) is determined renewal RFSP or SPID, and select GERAN or UTRAN preferential, the RFSP that E-UTRAN takes second place or SPID.
3. method according to claim 2, it is characterized in that, described MME determines that renewal RFSP or SPID are: described MME is according to the signing RFSP or the SPID that receive from home subscriber server (HSS), and/or operator's local policy and network state, and/or the contextual information of UE in MME or Serving GPRS Support Node (SGSN) judges whether to upgrade RFSP or SPID, wherein, when the RFSP of the signing RFSP receiving from HSS or SPID and current use or SPID are when inconsistent, and/or provide new RFSP/SPID or operator is local while selecting new RRM strategy when operator, and/or when network state changes, and/or when comprising UE purposes arranging in adhering to/position updating request of UE, described MME determines renewal RFSP or SPID.
4. method according to claim 3, it is characterized in that, the cell reselection strategy that the network side of described E-UTRAN is applied to described RFSP or SPID in RRM strategy is: the network side of described E-UTRAN also comprises enode b (eNB), described MME notifies described eNB by the RFSP of selection or SPID, and described eNB is applied to the cell reselection strategy in local RRM strategy by described RFSP or SPID.
5. method according to claim 4, it is characterized in that, the network side of described GERAN or UTRAN upgrades RFSP or SPID is: in the network side of described GERAN or UTRAN, core net is determined renewal RFSP or SPID, and select GERAN or UTRAN preferential, the RFSP that E-UTRAN takes second place or SPID; Described core net comprises mobile switching centre (MSC) or SGSN.
6. method according to claim 5, it is characterized in that, the cell reselection strategy that the network side of described GERAN or UTRAN is applied to described RFSP or SPID in self RRM strategy is: the network side of described GERAN or UTRAN also comprises Access Network, described core net is notified described Access Network by the RFSP of selection or SPID, and described Access Network is applied to the cell reselection strategy in local RRM strategy by described RFSP or SPID; Described Access Network comprises: the eNB of described GERAN or UTRAN or base station controller (BSC) or radio network controller (RNC).
7. method according to claim 6, is characterized in that, the method also comprises: described MME notifies described core net by S3 interface by the RFSP of selection or SPID, and described core net is notified described Access Network by Gb Interface or Iu interface.
8. method according to claim 1, is characterized in that, described PS relieve congestion is: the PS of UE side retreats that timer stops or expiring, and it is T3346 that described PS retreats timer.
9. method according to claim 1, is characterized in that, described UE returns to E-UTRAN and is: described UE combines and adheres to or combine tracking area update at E-UTRAN.
10. a system of selecting network priority, is characterized in that, this system comprises: first network side, second network side and UE, wherein,
First network side, for need to initiate CS service as the UE that PS is congested, CS is not congested and reside in E-UTRAN time, upgrades RFSP or SPID, and described RFSP or SPID are applied to the cell reselection strategy in self RRM strategy;
Second network side, for upgrading RFSP or SPID, and is applied to the cell reselection strategy in self RRM strategy by described RFSP or SPID;
UE, for arriving GERAN or UTRAN according to the cell reselection strategy gravity treatment of first network side, exists PS congested to described GERAN or UTRAN indication E-UTRAN; And the CS again initiating at self serves or the described MT of second network side initiation serves while finishing, and continues to reside in GERAN or UTRAN, until PS relieve congestion returns to E-UTRAN according to the cell reselection strategy of second network side.
11. systems according to claim 10, is characterized in that, described first network side comprises: the eNB of MME, E-UTRAN, wherein,
Described MME, for need to initiate CS service as the UE that PS is congested, CS is not congested and reside in E-UTRAN time, determine renewal RFSP or SPID, and select GERAN or UTRAN preferential, the RFSP that E-UTRAN takes second place or SPID, notify described eNB by the RFSP of selection or SPID;
Described eNB, for being applied to described RFSP or SPID the cell reselection strategy of local RRM strategy.
12. systems according to claim 11, is characterized in that, described second network side comprises: core net and Access Network, wherein,
Described core net, for receiving that E-UTRAN exists after the congested indication of PS, determine to upgrade RFSP or SPID, and select GERAN or UTRAN preferential, the RFSP that E-UTRAN takes second place or SPID, by described RFSP or SPID notice Access Network;
Described Access Network, for being applied to described RFSP or SPID the cell reselection strategy of local RRM strategy.
13. systems according to claim 12, is characterized in that, described core net comprises MSC or SGSN;
Described Access Network comprises: the eNB of described GERAN or UTRAN or BSC or RNC.
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