CN103686898B - Cell reselection method, device and system for heterogeneous-cellular-network multi-mode single-standby terminal - Google Patents
Cell reselection method, device and system for heterogeneous-cellular-network multi-mode single-standby terminal Download PDFInfo
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Abstract
The embodiment of the invention provides a cell reselection method, device and system for a heterogeneous-cellular-network multi-mode single-standby terminal, wherein the method for the heterogeneous-cellular-network multi-mode single-standby terminal includes: acquiring a system information block which is broadcasted by an access network; judging whether the system information block includes a reselection control indicator; and adopting a method of replacing the threshold value of the access network of a target cell reselected by the terminal so as to perform cell reselection when it is determined that the system information block includes the reselection control indicator. The method based on the system information block realizes switching of cell reselection schemes of the terminal so that combination with the prior protocols and realization in a network are easy. The improved cell reselection scheme is capable of preventing effectively network overload and ensuring QoS of users. Adoption of the scheme does not affect high-priority-level users of the access network. Compared with the prior simplex cell reselection R criterion, the scheme provides a more flexible reselection method so that overload responding and eliminating capabilities of the network are improved.
Description
Technical field
The present invention relates to wireless communication technology field, more particularly, to a kind of cell of heterogeneous-cellulmulti-mode multi-mode single-standby terminal
Reselecting method, apparatus and system.
Background technology
Isomery cellular network refers to the cellular mobile communication networks of the overlapped multiple different access technologies in overlay area
Wireless communication system being formed, providing the user plurality of access modes.With the fast development of cellular mobile communication technology,
The communication system assuming isomery cellular network form will become the trend of future network deployment.Multimode list treats that terminal refers to be equipped with
There is the radio frequency AM access module of multiple different access technologies, may reside within different access networks and accept service, and in difference
Access network between switching terminal.At present, second generation mobile communication system（2G）And 3-G (Generation Three mobile communication system)（3G）
Commercial on a large scale in the whole world.Third generation partner program（3GPP）The Long Term Evolution formulated（LTE）It is of future generation
The standard of mobile communications network.At this stage because 2G and 3G network have occupied the relatively low frequency range of frequency, the therefore deployment of LTE
Can only carry out in the higher frequency range of frequency, this is by the radius of society leading to LTE radius of society to be less than 2G and 3G.Compare 2G and 3G
All standing network for, LTE is probably only used as the network covering in hot spot region at the network design initial stage, and multimode list treats
Terminal will carry out gravity treatment or switching when passing in and out LTE overlay area between LTE and 3G/2G network.Existing 2G and
3G network has substantial amounts of storage user and basic network equipment, and the form using isomery cellular network disposes next generation network,
Evolution is carried out based on existing 3G system（For example evolve to TD-LTE from TD-SCDMA）, contribute to realizing the smooth liter of network
Level, saves networking cost, reduces the difficulty of operator's networking.
In terms of business, LTE is a full packet data network, in Evolved Packet Core（EPC）In there is not electricity
Road domain, can only be by based on IP Multimedia System it is impossible to realize the speech business of traditional approach（IMS）VoIP is provided（Voice
over IP）Business.And at the LTE networking initial stage, operator may provide VoIP business by LTE, can only pass through existing
3G/2G core net circuit domain come speech business to be provided it is therefore desirable to take some core network technologies come for LTE user provide voice
Business（Such as circuit domain dropping technology）.And, for comparing 3G and 2G network, LTE network supports higher data transfer speed
Rate, has higher data services capability.User when initiating data service it should preferentially adopt the LTE network of function admirable,
3G or 2G network initiated data business is only just used when LTE network cannot be used.
In isomery cellular network, the cell reselection behavior of idle mode terminals is recurrent.When terminal and base station
There are not wireless heterogeneous networks（RRC）During connection, this terminal is referred to as the terminal of idle pulley.It is in the terminal of idle pulley, meeting
Specified according to agreement, measure the signal intensity of each access network that it receives, and, when signal conditioning meets reselection criterion
When, it will actively leave the network concurrent being currently accessed and play the access request to other networks.This process is not related to core net
Signalling interactive process, is the behavior actively initiated by terminal.Taking TD-LTE/TD-SCDMA isomery cellular network as a example, TD-LTE
Network may be deployed in inner city and larger office place etc..The multimode list being in idle pulley treats that terminal is covered in TD-LTE
TD-SCDMA network is resided in outside cover area, and, during being gradually moved into TD-LTE overlay area inside, all the time
The received signal strength of monitoring TD-LTE network, when the signal intensity of TD-LTE network reaches certain thresholding, may turn on TD-
The cell reselection of LTE network is simultaneously linked into LTE network；When in this terminal is from TD-LTE overlay area to overlay area outside move
Dynamic, the received signal strength with TD-LTE network is gradually reduced, and when meeting reselection criterion, terminal will initiate TD-
The cell reselection of SCDMA network.
At present residence reselecting specified in agreement is the reselecting method based on priority, by by all alternative accesses
Network is according to prioritization, and completes cell reselection with reference to cell reselection R criterion.In real network, cover as focus
The huge portfolio of the TD-LTE network carrying.If do not limited to the gravity treatment behavior from TD-SCDMA network terminal
, easily there is TD-LTE network over loading, thus have impact on the service quality of other users in TD-LTE overlay area in system（QoS）.
As fully visible, need a kind of improved terminal housing estate reselecting method of proposition at present badly to avoid transshipping, and in overload
Rapid elimination is transshipped.
Content of the invention
The embodiment of the present invention provides a kind of residence reselecting of heterogeneous-cellulmulti-mode multi-mode single-standby terminal, device and is
System, to avoid transshipping to propose a kind of improved terminal housing estate reselecting method, and to eliminate rapidly overload in overload.
On the one hand, embodiments provide a kind of residence reselecting of heterogeneous-cellulmulti-mode multi-mode single-standby terminal,
The residence reselecting of described heterogeneous-cellulmulti-mode multi-mode single-standby terminal includes：
Obtain the system information block of access network broadcast；
Judge that whether comprising gravity treatment in described system information block controls designator；
If it is determined that comprising gravity treatment in described system information block to control designator, then using the Target cell replacing terminal gravity treatment
The mode of the threshold value of access network carry out cell reselection.
Optionally, in an embodiment of the present invention, the described system information block obtaining access network broadcast, including：Acquisition connects
When overload or there is overload risk in the judgement that networks, the system information block of broadcast；Wherein, the ginseng that described access network is judged
Number at least includes：The core net of the occupancy of the Traffic Channel of access network, the attached users of access network and portfolio, access network
The load condition in node pool area.
Optionally, in an embodiment of the present invention, the described door using the access network of Target cell replacing terminal gravity treatment
The mode of limit value carries out cell reselection, including：By the way of the threshold value replacing the access network of Target cell of terminal gravity treatment,
Priority relationship between the access network of the Target cell according to terminal gravity treatment and the access network of current area carries out cell reselection.
Optionally, in an embodiment of the present invention, the described door using the access network of Target cell replacing terminal gravity treatment
The mode of limit value, the priority relationship between the access network of the Target cell according to terminal gravity treatment and the access network of current area is entered
Row cell reselection, including：When the access network of the Target cell of terminal gravity treatment is higher than the priority between the access network of current area
When, for the terminal of low priority access network, using the thresholding of the access network of the Target cell replacing with higher terminal gravity treatment
The mode of value, to increase the terminal gravity treatment of described low priority access network to the difficulty of high priority access network；Or, work as terminal
When the access network of the Target cell of gravity treatment is lower than the priority between the access network of current area, for high priority access network
Terminal, by the way of the threshold value replacing with the access network of Target cell of relatively low terminal gravity treatment, and is carried out according to probability
The mode of gravity treatment, to reduce the terminal gravity treatment of described high priority access network to the difficulty of low priority access network.
Optionally, in an embodiment of the present invention, described gravity treatment controls designator to include the network identity of access network；Described
When the access network of the Target cell of terminal gravity treatment is lower than the priority between the access network of current area, high priority is connect
The terminal networking, by the way of the threshold value replacing with the access network of Target cell of relatively low terminal gravity treatment, and according to general
Rate carries out the mode of gravity treatment, to reduce the terminal gravity treatment of described high priority access network to the difficulty of low priority access network, wraps
Include：When the access network of the Target cell of terminal gravity treatment is lower than the priority between the access network of current area, preferential for height
The terminal of level access network, by the way of the threshold value replacing with the access network of Target cell of relatively low terminal gravity treatment, and,
, arrived to low priority access network with the terminal gravity treatment reducing described high priority access network with probability P (RRAT K, Δ T1) gravity treatment
The difficulty of low priority access network；If K is the network identity of access network, RRAT K is the received signal power of access network K；
ThreshRAT K,1And ThreshRAT K,2Thresholding 1 for access network K and thresholding 2, Δ T1It is on the occasion of thresholding increment, Δ T1Reference
Value is thresholding ThreshRAT K,110% to 20%, then：
On the other hand, embodiments provide a kind of cell reselection dress of heterogeneous-cellulmulti-mode multi-mode single-standby terminal
Put, the cell reselection device of described heterogeneous-cellulmulti-mode multi-mode single-standby terminal includes：
Acquiring unit, for obtaining the system information block of access network broadcast；
Judging unit, for judging that whether comprising gravity treatment in described system information block controls designator；
Replacement unit, for if it is determined that comprising gravity treatment in described system information block to control designator, then using replacement terminal
The mode of the threshold value of the access network of the Target cell of gravity treatment carries out cell reselection.
Optionally, in an embodiment of the present invention, described replacement unit, for using the Target cell replacing terminal gravity treatment
The threshold value of access network mode, between the access network of the Target cell according to terminal gravity treatment and the access network of current area
Priority relationship carries out cell reselection.
Optionally, in an embodiment of the present invention, described replacement unit, specifically for the Target cell when terminal gravity treatment
When access network is higher than the priority between the access network of current area, for the terminal of low priority access network, using replacing with
The mode of the higher threshold value of the access network of the Target cell of terminal gravity treatment, to increase the terminal of described low priority access network
Gravity treatment is to the difficulty of high priority access network；Or, when terminal gravity treatment Target cell access network than current area access
When priority between net is low, for the terminal of high priority access network, little using the target replacing with relatively low terminal gravity treatment
The mode of the threshold value of the access network in area, and carry out the mode of gravity treatment according to probability, to reduce described high priority access network
Terminal gravity treatment is to the difficulty of low priority access network.
Optionally, in an embodiment of the present invention, described replacement unit, further specifically for when the target of terminal gravity treatment
When the access network of cell is lower than the priority between the access network of current area, for the terminal of high priority access network, adopt
Replace with the mode of the relatively low threshold value of the access network of the Target cell of terminal gravity treatment, and, with probability P (RRAT K,ΔT1)
Gravity treatment to low priority access network, to reduce the terminal gravity treatment of described high priority access network to the difficulty of low priority access network
Degree；If K is the network identity of access network, RRAT KReceived signal power for access network K；ThreshRAT K, 1And ThreshRAT K,2
Thresholding 1 for access network K and thresholding 2, Δ T1It is on the occasion of thresholding increment, Δ T1Reference value be thresholding ThreshRAT K,1's
10% to 20%, then：
Another further aspect, embodiments provides a kind of cell reselection system of heterogeneous-cellulmulti-mode multi-mode single-standby terminal
System, the cell reselection system of described heterogeneous-cellulmulti-mode multi-mode single-standby terminal includes：Access network equipment and terminal, wherein, described
Terminal includes the cell reselection device of above-mentioned heterogeneous-cellulmulti-mode multi-mode single-standby terminal；
Described access network equipment, during for judging that access network overload or there is overload risk, in system information block
Broadcast gravity treatment controls designator；Wherein, the parameter being judged at least includes：The occupancy of the Traffic Channel of access network, access
The attached users of net and the load condition of portfolio, the node pool of core network area of access network.
Technique scheme has the advantages that：Because using the system information block obtaining access network broadcast, judge
Whether comprise gravity treatment in described system information block and control designator, if it is determined that comprising gravity treatment in described system information block to control instruction
Symbol, then carry out the technological means of cell reselection by the way of the threshold value replacing the access network of Target cell of terminal gravity treatment,
So having reached following technique effect：Achieve the switching of the cell reselection scheme of terminal based on the mode of system information block, easily
In with existing protocol combine and realize in a network；Improved cell reselection scheme can be effectively prevented from network over loading it is ensured that
The QoS of user in access network K；Do not interfere with the user of high priority access network using the program；The program is compared existing
Single cell reselection R criterion, there is provided more flexible reselection modes, improves the ability that network is tackled and eliminated overload.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, acceptable
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of residence reselecting flow chart of heterogeneous-cellulmulti-mode multi-mode single-standby terminal of the embodiment of the present invention；
Fig. 2 is that a kind of cell reselection apparatus structure of heterogeneous-cellulmulti-mode multi-mode single-standby terminal of the embodiment of the present invention is illustrated
Figure；
Fig. 3 is the concrete steps flow chart of the R criterion of cell reselection specified in 3GPP agreement TS 36.304；
Fig. 4 is the concrete of the residence reselecting of the improved heterogeneous-cellulmulti-mode multi-mode single-standby terminal of application example of the present invention
Flow chart of steps；
Fig. 5 is that the terminal within application example low priority access network D of the present invention adopts improved isomery cellular network many
The concrete steps flow chart of the residence reselecting of terminal treated by mould list；
Fig. 6 is that the terminal within application example access network K of the present invention treats end using improved isomery cellular network multimode list
The concrete steps flow chart of the residence reselecting at end；
For application example of the present invention under TD-LTE/TD-SCDMA isomery cellular network environment, terminal adopts improved Fig. 7
The concrete steps flow chart of residence reselecting.
Specific embodiment
To describe embodiments of the present invention in detail below with reference to drawings and Examples, whereby how the present invention to be applied
Technological means are solving technical problem, and reach realizing process and fully understanding and implement according to this of technique effect.Need explanation
As long as not constituting conflict, each embodiment in the present invention and each feature in each embodiment can be combined with each other,
The technical scheme being formed is all within protection scope of the present invention.
In addition, the step that illustrates of flow process in accompanying drawing can be in the department of computer science of such as one group of computer executable instructions
Execute in system, and although showing logical order in flow charts, but in some cases, can be with different from herein
The shown or described step of order execution.
Define certain access network thresholding 1 be other access networks cell terminal gravity treatment arrive this access network cell when, end
End needs the minimum of the cell received signal power of this access network of satisfaction.The thresholding 2 defining certain access network is this access network
Cell terminal gravity treatment to low priority access network（Priority is less than the access network of this access network）Cell when, terminal need
The peak of the cell received signal power of this access network meeting.
As shown in figure 1, the residence reselecting stream for a kind of heterogeneous-cellulmulti-mode multi-mode single-standby terminal of the embodiment of the present invention
Cheng Tu, the residence reselecting of described heterogeneous-cellulmulti-mode multi-mode single-standby terminal includes：
Step 101, the system information block of acquisition access network broadcast；
Step 102, judge whether to comprise gravity treatment in described system information block and control designator；
Step 103 controls designator if it is determined that comprising gravity treatment in described system information block, then using replacement terminal gravity treatment
The mode of the threshold value of the access network of Target cell carries out cell reselection.
Optionally, the described system information block obtaining access network broadcast, including：Obtain access network to judge overload occurs or deposit
When transshipping risk, the system information block of broadcast；Wherein, the parameter that described access network is judged at least includes：Access network
The occupancy of Traffic Channel, the attached users of access network and portfolio, the load condition in the node pool of core network area of access network.
Optionally, carry out cell weight by the way of the threshold value of access network of the described Target cell using replacement terminal gravity treatment
Choosing, including：By the way of the threshold value replacing the access network of Target cell of terminal gravity treatment, little according to the target of terminal gravity treatment
Priority relationship between the access network in area and the access network of current area carries out cell reselection.
Optionally, by the way of the threshold value of access network of the described Target cell using replacement terminal gravity treatment, according to terminal
Priority relationship between the access network of the Target cell of gravity treatment and the access network of current area carries out cell reselection, including：When
When the access network of the Target cell of terminal gravity treatment is higher than the priority between the access network of current area, low priority is accessed
The terminal of net, by the way of the threshold value replacing with the access network of Target cell of higher terminal gravity treatment, described to increase
The terminal gravity treatment of low priority access network is to the difficulty of high priority access network；Or, when the connecing of Target cell of terminal gravity treatment
When networking lower than the priority between the access network of current area, for the terminal of high priority access network, using replacing with relatively
The mode of the low threshold value of the access network of the Target cell of terminal gravity treatment, and carry out the mode of gravity treatment according to probability, to reduce
The terminal gravity treatment of described high priority access network is to the difficulty of low priority access network.
Optionally, described gravity treatment controls designator to include the network identity of access network；The described target when terminal gravity treatment is little
When the access network in area is lower than the priority between the access network of current area, for the terminal of high priority access network, using replacing
It is changed to the mode of the relatively low threshold value of the access network of the Target cell of terminal gravity treatment, and carry out the mode of gravity treatment according to probability,
With reduce described high priority access network terminal gravity treatment to low priority access network difficulty, including：Mesh when terminal gravity treatment
When the access network of mark cell is lower than the priority between the access network of current area, for the terminal of high priority access network, adopt
With replacing with the mode of the threshold value of the access network of the Target cell of relatively low terminal gravity treatment, and, with probability P (RRAT K,Δ
T1) gravity treatment to low priority access network, to reduce the terminal gravity treatment of described high priority access network to low priority access network
Difficulty；If K is the network identity of access network, RRAT KReceived signal power for access network K；ThreshRAT K,1With
ThreshRAT K,2Thresholding 1 for access network K and thresholding 2, Δ T1It is on the occasion of thresholding increment, Δ T1Reference value be thresholding
ThreshRAT K,110% to 20%, then：
Corresponding to said method embodiment, as shown in Fig. 2 treating for a kind of embodiment of the present invention isomery cellular network multimode list
The cell reselection apparatus structure schematic diagram of terminal, the cell reselection device of described heterogeneous-cellulmulti-mode multi-mode single-standby terminal includes：
Acquiring unit 21, for obtaining the system information block of access network broadcast；
Judging unit 22, for judging that whether comprising gravity treatment in described system information block controls designator；
Replacement unit 23, for if it is determined that comprising gravity treatment in described system information block to control designator, then whole using replacing
The mode of the threshold value of the access network of Target cell of end gravity treatment carries out cell reselection.
Optionally, described replacement unit 23, for the threshold value of the access network using the Target cell replacing terminal gravity treatment
Mode, the priority relationship between the access network of the Target cell according to terminal gravity treatment and the access network of current area carries out little
Area's gravity treatment.
Optionally, described replacement unit 23, the access network specifically for the Target cell when terminal gravity treatment compares current area
Access network between priority high when, for the terminal of low priority access network, using replacing with higher terminal gravity treatment
The mode of the threshold value of the access network of Target cell, is connect to high priority with the terminal gravity treatment increasing described low priority access network
The difficulty networking；Or, when the access network of the Target cell of terminal gravity treatment is lower than the priority between the access network of current area
When, for the terminal of high priority access network, using the thresholding of the access network of the Target cell replacing with relatively low terminal gravity treatment
The mode of value, and carry out the mode of gravity treatment according to probability, with the terminal gravity treatment reducing described high priority access network arrive low preferentially
The difficulty of level access network.
Optionally, described replacement unit 23, the access network ratio specifically for the Target cell when terminal gravity treatment ought further
When priority between the access network of front cell is low, for the terminal of high priority access network, using replacing with relatively low terminal
The mode of the threshold value of the access network of the Target cell of gravity treatment, and, with probability P (RRAT K,ΔT1) gravity treatment connects to low priority
Network, to reduce the terminal gravity treatment of described high priority access network to the difficulty of low priority access network；If K is the net of access network
Network identifies, RRAT KReceived signal power for access network K；ThreshRAT K,1And ThreshRAT K,2Thresholding 1 He for access network K
Thresholding 2, Δ T1It is on the occasion of thresholding increment, Δ T1Reference value be thresholding ThreshRAT K,110% to 20%, then：
Another further aspect, embodiments provides a kind of cell reselection system of heterogeneous-cellulmulti-mode multi-mode single-standby terminal
System, the cell reselection system of described heterogeneous-cellulmulti-mode multi-mode single-standby terminal includes：Access network equipment and terminal, wherein, described
Terminal includes the cell reselection device of above-mentioned heterogeneous-cellulmulti-mode multi-mode single-standby terminal；
Described access network equipment, during for judging that access network overload or there is overload risk, in system information block
Broadcast gravity treatment controls designator；Wherein, the parameter being judged at least includes：The occupancy of the Traffic Channel of access network, access
The attached users of net and the load condition of portfolio, the node pool of core network area of access network.
Embodiment of the present invention said method, apparatus and system technical scheme have the advantages that：Because using acquisition
The system information block of access network broadcast, judges that whether comprising gravity treatment in described system information block controls designator, if it is determined that described
Comprise gravity treatment in system information block and control designator, then using the threshold value of the access network of Target cell replacing terminal gravity treatment
Mode carries out the technological means of cell reselection, so having reached following technique effect：Achieved based on the mode of system information block
The switching of the cell reselection scheme of terminal is it is easy to combining and realize in a network with existing protocol；Improved cell reselection scheme
Network over loading can be effectively prevented from it is ensured that in access network K user QoS；Do not interfere with high priority using the program to connect
The user networking；The program compares existing single cell reselection R criterion, there is provided more flexible reselection modes, lifting
Network is tackled and is eliminated the ability of overload.
In order to clearly show technical scheme, below lift application example and illustrate：
The present invention analyzes the R criterion of cell reselection specified in 3GPP agreement TS 36.304 first.This criterion is by each access
Net is ranked up according to priority.
Specify, terminal is for high priority access network according to agreement（Priority is higher than the access network of present Access）Little
Cell reselection is opened in area to be needed to meet, in time period TreselectionRATInterior, the cell of this high priority access network receives letter
Number power is more than the thresholding 1 of this high priority access network；Terminal needs for the cell unlatching cell reselection of low priority access network
Meet, in time period TreselectionRATInterior, the cell received signal power of this low priority access network is low excellent more than this
The thresholding 1 of first level access network, and the cell received signal power of present Access is less than the thresholding 2 of present Access.Wherein
RAT represents different wireless access technologys.
Fig. 3 illustrates the concrete steps flow chart of the R criterion of cell reselection specified in 3GPP agreement TS 36.304, bag
Include following steps：
Step 301, terminal obtains the door of described each access network by way of being pre-configured with or reading system information block
Limit 1 and the prioritization of thresholding 2 and each access network.
Step 302, judges the priority relationship between the access network of the Target cell of gravity treatment and the access network of current area.
If the priority of the access network of Target cell is higher than the priority of the access network of current area, execution step 303；If Target cell
Access network priority be less than current area access network priority, execution step 304.
Step 303, judges whether to meet following condition, in time period TreselectionRATInterior, this high priority accesses
The cell received signal power of net is more than the thresholding 1 of this high priority access network.If meeting, execution step 305；If being unsatisfactory for,
Execution step 306.
Step 304, judges whether to meet following condition, in time period TreselectionRATInterior, this low priority accesses
The cell received signal power of net is more than the thresholding 1 of this low priority access network, and the cell received signal of present Access
Power is less than the thresholding 2 of present Access.If meeting, execution step 305；If being unsatisfactory for, execution step 306.
Step 305, terminal opens the cell reselection of Target cell.
Step 306, terminal is not turned on the cell reselection of Target cell.
The method does not account for, in real network, such as in TD-LTE/TD-SCDMA isomery cellular network, as
The huge portfolio of the TD-LTE network carrying that focus covers, if not to the gravity treatment behavior from TD-SCDMA network terminal
Being limited, easily TD-LTE network over loading being occurred, thus have impact on the service quality of other users in TD-LTE overlay area
（QoS）.The residence reselecting of improved heterogeneous-cellulmulti-mode multi-mode single-standby terminal is thereby proposed.
First application example：
The residence reselecting of improved heterogeneous-cellulmulti-mode multi-mode single-standby terminal is described with reference to Fig. 4.Usually, false
Surely the cell being directed to access network K carries out gravity treatment control, to alleviate the portfolio of access network K, it is to avoid network over loading is it is ensured that QoS.
The realization mechanism of the method is as follows：Terminal for low priority access network is it should increase its gravity treatment to access network K
Difficulty, reduce in low priority access network, the terminal of cell reselection of opening access network K number；For access network K
Terminal it should reduce its gravity treatment to the difficulty of low priority access network, increase in access network K, open low priority and connect
The number of the terminal of cell reselection networking.And, in order to not affect high priority access network, for the terminal weight of access network K
Choose the terminal gravity treatment of high priority access network and high priority access network to access network K situation without any changes.When
During network even running, terminal carries out cell reselection using the R criterion in agreement；When network traffic increases sharply, there is overload wind
When dangerous, terminal should enable improved residence reselecting；When network traffic declines and recovers steady, terminal reactivates
R criterion carries out cell reselection.
The thresholding 1 of note access network K and thresholding 2 are respectively ThreshRAT K,1And ThreshRAT K,2, wherein K is access network
Network identity, is below similar to, and repeats no more.The received signal power of note access network K is RRAT K.Definition is on the occasion of thresholding increment Delta T1
With Δ T2.Define gravity treatment probability function P (RRAT K,ΔT1).Remember that certain low priority access network is access network D, certain high priority connects
Network as access network G.
As shown in figure 4, the method includes the steps of：
Step 401, network judges that access network K overload or there is overload risk.Gravity treatment is broadcasted in system information block
Control designator.Terminal enables improved residence reselecting and carries out cell reselection.
Step 402, for the terminal of access network D, using new thresholding ThreshRAT K,1+ΔT1Replace ThreshRAT K, 1, use
In this terminal gravity treatment to access network K.
Step 403, for the terminal of access network K, using new thresholding ThreshRAT D,1-ΔT2Replace ThreshRAT D,1, and
And, with probability P (RRAT K,ΔT1) gravity treatment is to low priority access network D.
Step 404, network judges that the overload of access network K has eliminated.In system information block, gravity treatment is cancelled in broadcast
Control designator.Terminal reactivates R criterion and carries out cell reselection.
In step 401 and step 404, system judges whether access network K is in the evaluating of overload, including but
It is not limited to：The core net of the occupancy of the Traffic Channel of access network K, the attached users of access network K and portfolio, access network K
Node pool area（The MSC pool area of such as 3G core net and the movement of Serving GPRS Support Node Chi Qu, 4G core net
Property management entity Chi Qu）Load condition etc..
In step 401, in system information block, the gravity treatment of broadcast controls designator should comprise the network identity of access network K.
In step 403, probability P (RRAT K,ΔT1) expression formula as follows：
ΔT1With Δ T2Reference value be respectively thresholding ThreshRAT K,1With thresholding ThreshRAT D,110% to 20%.
Value should be determined in the results of property in real network according to this method.
Technical staff more fully understands this method for convenience, and the R criterion of this method and cell reselection is contrasted：?
In the judgment condition of the step 404 of R criterion of cell reselection, i.e. in time period TreselectionRATInterior, low priority accesses
The cell received signal power of net is more than the thresholding 1 of this low priority access network, and the cell received signal of present Access
When power is less than the thresholding 2 of present Access, terminal opens the gravity treatment of Target cell, and this is equivalent to, low priority access network
Cell received signal power be more than this low priority access network thresholding 1 when, terminal is with probability P (RRAT K, 0) and open target
The cell reselection of cell, wherein,
This expression formula shows, the R criterion of cell reselection is the cell weight of improved heterogeneous-cellulmulti-mode multi-mode single-standby terminal
The special case of choosing method.Configuration Δ T1=0 and Δ T2=0, when carrying out gravity treatment control for access network K, improved isomery cellular network
Multimode list treats that the residence reselecting of terminal deteriorates to the R criterion of cell reselection.
By the step 402 using this method, improve the terminal gravity treatment of access network D to during access network K to access network K
The minimum requirements of cell received signal power, increased the difficulty of the terminal gravity treatment of low priority access network to access network K；Pass through
Using step 403, reduce the terminal gravity treatment of access network K to during access network D to the cell received signal power of access network D
High request.
In real network, user accesses high-priority network and can obtain higher QoS.For example, in TD-LTE/TD-
In SCDMA isomery cellular network, TD-LTE network is high-priority network, and user accesses TD-LTE network and can enjoy high speed number
According to business, obtain high QoS.If user initiates cell reselection from high-priority network to low priority network, it will bring QoS's
Decline.Therefore in the present invention, the cell received signal power for access network K is in ThreshRAT K,2To ThreshRAT K,2+
ΔT1Between terminal, with probability P (RRAT K,ΔT1) execution gravity treatment, and non-immediate using new thresholding ThreshRAT K,2+ΔT1Generation
For ThreshRAT K, 2To force to make these terminals execute gravity treatment, can alleviate due to being to connect using improved residence reselecting
The QoS loss that the part terminal of networking K is brought, thus lift access network K further（It is TD-LTE network herein）Interior user's
Average QoS.
For high priority access network G, without any changes.
The method is compared to the advantage of traditional method, realizes the cell reselection of terminal based on the mode of system information block
The switching of scheme is it is easy to combining and realize in a network with existing protocol；Improved cell reselection scheme can be effectively prevented from
Network over loading it is ensured that in access network K user QoS；Do not interfere with the user of high priority access network using the program；The party
Case compares existing single cell reselection R criterion, there is provided more flexible reselection modes, improves network and tackles and eliminate
The ability of overload.
Second application example：
Illustrate that, under real network environment, when carrying out gravity treatment control for access network K, low priority connects with reference to Fig. 5
Terminal within networking D adopts the specific embodiment party of the residence reselecting of improved heterogeneous-cellulmulti-mode multi-mode single-standby terminal
Formula.Comprise the steps of：
Step 501, terminal obtains the door of described each access network by way of being pre-configured with or reading system information block
Limit 1 and the prioritization of thresholding 2 and each access network.
Step 502, judges that whether comprising gravity treatment in system information block controls designator.If not comprising, execution step 503.
If comprising, execution step 504.
Step 503, terminal enables R criterion and carries out cell reselection.Concrete steps with cell reselection R criterion step 302 to
Step 304.And, terminal return to step 502 when reading system information block next time.
Step 504, terminal enables improved residence reselecting and carries out cell reselection.Terminal adopts new thresholding
ThreshRATK,1+ΔT1Replace ThreshRAT K, 1, for gravity treatment to access network K.
Step 505, judges the priority relationship between the access network of the Target cell of gravity treatment and the access network of current area.
If the priority of the access network of Target cell is higher than the priority of the access network of current area, execution step 506；If target target
The priority of the access network of cell is less than the priority of the access network of current area, execution step 507.
Step 506, judges whether to meet following condition, in time period TreselectionRATInterior, this high priority accesses
The cell received signal power of net is more than the thresholding 1 of this high priority access network.If meeting, execution step 508；If being unsatisfactory for,
Execution step 509.
Step 507, judges whether to meet following condition, in time period TreselectionRATInterior, this low priority accesses
The cell received signal power of net is more than the thresholding 1 of this low priority access network, and the cell received signal of present Access
Power is less than the thresholding 2 of present Access.If meeting, execution step 508；If being unsatisfactory for, execution step 509.
Step 508, terminal opens the cell reselection of Target cell.And, terminal is when reading system information block next time
Return to step 502.
Step 509, terminal is not turned on the cell reselection of Target cell.And, terminal reads system information block in next time
When return to step 502.
In step 506, if the access network of the Target cell of gravity treatment is exactly access network K, according to step 504, adopt
New thresholding ThreshRAT K,1+ΔT1Replace ThreshRAT K, 1, for gravity treatment to access network K.Decision rule is, in the time period
TreselectionRATInterior, the cell received signal power of access network K is more than new thresholding ThreshRAT K,1+ΔT1, then open
The cell reselection of the Target cell of access network K, is otherwise not turned on the cell reselection of the Target cell of access network K.
3rd application example：
Illustrate under real network environment with reference to Fig. 6, when carrying out gravity treatment control for access network K, inside access network K
Terminal adopt improved heterogeneous-cellulmulti-mode multi-mode single-standby terminal residence reselecting specific embodiment.Comprise following
Step：
Step 601, terminal obtains the door of described each access network by way of being pre-configured with or reading system information block
Limit 1 and the prioritization of thresholding 2 and each access network.
Step 602, judges that whether comprising gravity treatment in system information block controls designator.If not comprising, execution step 603.
If comprising, execution step 604.
Step 603, terminal enables R criterion and carries out cell reselection.Concrete steps with cell reselection R criterion step 302 to
Step 304.And, terminal return to step 602 when reading system information block next time.
Step 604, terminal enables improved residence reselecting and carries out cell reselection.Terminal adopts new thresholding
ThreshRATD,1-ΔT2Replace ThreshRAT D,1, for gravity treatment to all low priority access networks D.
Step 605, judges the priority relationship between the access network of the Target cell of gravity treatment and the access network of current area.
If the priority of the access network of Target cell is higher than the priority of the access network of current area, execution step 606；If target target
The priority of the access network of cell is less than the priority of the access network of current area, execution step 607.
Step 606, judges whether to meet following condition, in time period TreselectionRATInterior, this high priority accesses
The cell received signal power of net is more than the thresholding 1 of this high priority access network.If meeting, execution step 608；If being unsatisfactory for,
Execution step 609.
Step 607, judges whether to meet following condition, in time period TreselectionRATInterior, this low priority accesses
The cell received signal power of net is more than the thresholding 1 of this low priority access network.If meeting, with probability P (RRAT K,ΔT1) execution
Step 608；If being unsatisfactory for, execution step 609.
Step 608, terminal opens the cell reselection of Target cell.And, terminal is when reading system information block next time
Return to step 602.
Step 609, terminal is not turned on the cell reselection of Target cell.And, terminal reads system information block in next time
When return to step 602.
4th application example：
Illustrate under TD-LTE/TD-SCDMA isomery cellular network environment with reference to Fig. 7, for the TD- of high priority
When LTE network carries out gravity treatment control, the terminal positioned at TD-LTE coverage edge region adopts improved isomery cellular network
The specific embodiment of the residence reselecting of terminal treated by multimode list.Comprise the steps of：
Step 701, terminal obtains the door of described each access network by way of being pre-configured with or reading system information block
Limit 1 and the prioritization of thresholding 2 and each access network.
Step 702, judges that whether comprising gravity treatment in system information block controls designator.If not comprising, execution step 703.
If comprising, execution step 704.
Step 703, terminal enables R criterion and carries out cell reselection.Concrete steps with cell reselection R criterion step 302 to
Step 304.And, terminal return to step 702 when reading system information block next time.
Step 704, terminal enables improved residence reselecting and carries out cell reselection.Terminal adopts new thresholding
ThreshLTE,1+ΔT1Replace ThreshLTE,1, for gravity treatment to TD-LTE network；Terminal adopts new thresholding ThreshCDMA,1-Δ
T2Replace ThreshCDMA,1, for gravity treatment to TD-SCDMA network.
Step 705, if terminal has accessed TD-SCDMA network, execution step 706；If terminal has accessed TD-LTE network,
Execution step 707.
Step 706, judges whether to meet following condition, in time period TreselectionLTEInterior, TD-LTE network little
Area's received signal power is more than ThreshLTE,1+ΔT1.If meeting, open the cell reselection of TD-LTE network；If discontented
Foot, then be not turned on the cell reselection of TD-LTE network.And, terminal return to step 702 when reading system information block next time.
Step 707, judges whether to meet following condition, in time period TreselectionCDMAInterior, the cell of TD-SCDMA
Received signal power is more than ThreshCDMA,1-ΔT2.If meeting, with probability P (RLTE,ΔT1) open TD-SCDMA network
Cell reselection；If being unsatisfactory for, it is not turned on the cell reselection of TD-SCDMA network.And, terminal is believed in next reading system
Return to step 702 during breath block.
Other application example：
When carrying out gravity treatment control for access network K, the terminal of high priority access network G interior adopts improved isomery honeycomb
Network multimode list treats that the specific embodiment of residence reselecting of terminal is identical with the R criterion of cell reselection, no longer superfluous
State.
Application example of the present invention achieved based on the mode of system information block the cell reselection scheme of terminal switching it is easy to
Combine with existing protocol and realize in a network；Improved cell reselection scheme can be effectively prevented from network over loading it is ensured that connecing
The QoS of user in networking K；Do not interfere with the user of high priority access network using the program；The program compares existing list
One cell reselection R criterion, there is provided more flexible reselection modes, improves the ability that network is tackled and eliminated overload.
Those skilled in the art are it will also be appreciated that the various illustrative components, blocks listed of the embodiment of the present invention
（illustrative logical block）, unit, and step can pass through electronic hardware, computer software, or both knots
Conjunction is realized.For clearly showing that the replaceability of hardware and software（interchangeability）, above-mentioned various explanations
Property part（illustrative components）, unit and step have universally described their function.Such work(
It can be the design requirement realized by hardware or software depending on specific application and whole system.Those skilled in the art
Can be for every kind of specific application, it is possible to use various methods realize described function, but this realization is understood not to
Scope beyond embodiment of the present invention protection.
Various illustrative logical block described in the embodiment of the present invention, or unit can pass through general processor,
Digital signal processor, special IC（ASIC）, field programmable gate array（FPGA）Or other programmable logic device,
Discrete gate or transistor logic, discrete hardware components, or the design of any of the above described combination are realizing or to operate described function.
General processor can be microprocessor, alternatively, this general processor can also for any traditional processor, controller,
Microcontroller or state machine.Processor can also be realized by the combination of computing device, for example digital signal processor and micro-
Processor, multi-microprocessor, one or more microprocessors one Digital Signal Processor Core of joint, or any other like
Configuration realizing.
The step of the method described in the embodiment of the present invention or algorithm can be directly embedded into hardware, computing device soft
Part module or the combination of both.Software module can be stored in RAM memory, flash memory, ROM memory, EPROM storage
Other any form of storage media in device, eeprom memory, depositor, hard disk, moveable magnetic disc, CD-ROM or this area
In.Exemplarily, storage medium can be connected with processor, so that processor can read information from storage medium, and
Write information can be deposited to storage medium.Alternatively, storage medium can also be integrated in processor.Processor and storage medium can
To be arranged in ASIC, ASIC can be arranged in user terminal.Alternatively, processor and storage medium can also be arranged at use
In different part in the terminal of family.
In one or more exemplary designs, above-mentioned functions described by the embodiment of the present invention can be in hardware, soft
The combination in any of part, firmware or this three is realizing.If realized in software, these functions can store and computer-readable
On medium, or it is transmitted on the medium of computer-readable with one or more instructions or code form.Computer readable medium includes electricity
Brain stores medium and is easy to so that allowing computer program transfer to the telecommunication media in other places from a place.Storage medium is permissible
It is any general or special computer can be with the useable medium of access.For example, such computer readable media can include but
It is not limited to RAM, ROM, EEPROM, CD-ROM or other optical disc storage, disk storage or other magnetic storage device, or other
What can be used for carrying or storing to instruct or data structure and other can be by general or special computer or general or special handlings
Device reads the medium of the program code of form.Additionally, any connection can be properly termed computer readable medium, example
As if software is to pass through a coaxial cable, fiber optic cables, double from a web-site, server or other remote resource
Twisted wire, Digital Subscriber Line（DSL）Or with the wireless way for transmittings such as example infrared, wireless and microwave be also contained in defined
In computer readable medium.Described video disc（disk）And disk（disc）Including Zip disk, radium-shine disk, CD, DVD, floppy disk
And Blu-ray Disc, disk is generally with magnetic duplication data, and video disc generally carries out optical reproduction data with laser.Combinations of the above
Can also be included in computer readable medium.
Above-described specific embodiment, has been carried out to the purpose of the present invention, technical scheme and beneficial effect further
Describe in detail, be should be understood that the specific embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, all any modification, equivalent substitution and improvement within the spirit and principles in the present invention, done etc., all should comprise
Within protection scope of the present invention.
Claims (6)
1. a kind of residence reselecting of heterogeneous-cellulmulti-mode multi-mode single-standby terminal is it is characterised in that described isomery cellular network
Multimode list treats that the residence reselecting of terminal includes：
Obtain the system information block of access network broadcast；
Judge that whether comprising gravity treatment in described system information block controls designator；
If it is determined that comprising gravity treatment in described system information block to control designator, then connecing using the Target cell replacing terminal gravity treatment
The mode of the threshold value networking carries out cell reselection；
Wherein, carry out cell reselection by the way of the threshold value of access network of the described Target cell using replacement terminal gravity treatment, bag
Include：
By the way of the threshold value replacing the access network of Target cell of terminal gravity treatment, Target cell according to terminal gravity treatment
Priority relationship between access network and the access network of current area carries out cell reselection；
By the way of the threshold value of access network of the described Target cell using replacement terminal gravity treatment, little according to the target of terminal gravity treatment
Priority relationship between the access network in area and the access network of current area carries out cell reselection, including：
When the access network of the Target cell of terminal gravity treatment is higher than the priority between the access network of current area, for low preferential
The terminal of level access network, by the way of the threshold value replacing with the access network of Target cell of higher terminal gravity treatment, to increase
Plus the terminal gravity treatment of described low priority access network is to the difficulty of high priority access network；Or,
When the access network of the Target cell of terminal gravity treatment is lower than the priority between the access network of current area, preferential for height
The terminal of level access network, by the way of the threshold value replacing with the access network of Target cell of relatively low terminal gravity treatment, and
Carry out the mode of gravity treatment according to probability, to reduce the terminal gravity treatment of described high priority access network to the difficulty of low priority access network
Degree.
2. the residence reselecting of heterogeneous-cellulmulti-mode multi-mode single-standby terminal as claimed in claim 1 is it is characterised in that described obtain
Take the system information block of access network broadcast, including：
When obtaining access network judgement appearance overload or there is overload risk, the system information block of broadcast；Wherein, described access network is entered
The parameter that row judges at least includes：The occupancy of the Traffic Channel of access network, the attached users of access network and portfolio, access
The load condition in the node pool of core network area of net.
3. the residence reselecting of heterogeneous-cellulmulti-mode multi-mode single-standby terminal as claimed in claim 1 is it is characterised in that described heavy
Selected control designator includes the network identity of access network；The access network of the described Target cell when terminal gravity treatment is than current area
When priority between access network is low, for the terminal of high priority access network, using the mesh replacing with relatively low terminal gravity treatment
The mode of the threshold value of access network of mark cell, and carry out the mode of gravity treatment according to probability, accessed with reducing described high priority
Net terminal gravity treatment to low priority access network difficulty, including：
When the access network of the Target cell of terminal gravity treatment is lower than the priority between the access network of current area, preferential for height
The terminal of level access network, by the way of the threshold value replacing with the access network of Target cell of relatively low terminal gravity treatment, and,
With probability P (RRAT K,ΔT1) gravity treatment to low priority access network, to reduce the terminal gravity treatment of described high priority access network to low
The difficulty of priority access network；
If K is the network identity of access network, RRAT KReceived signal power for access network K；ThreshRAT K,1And ThreshRAT K,2
Thresholding 1 for access network K and thresholding 2, Δ T1It is on the occasion of thresholding increment, Δ T1Reference value be thresholding ThreshRAT K,1's
10% to 20%, then：
4. a kind of cell reselection device of heterogeneous-cellulmulti-mode multi-mode single-standby terminal is it is characterised in that described isomery cellular network
Multimode list treats that the cell reselection device of terminal includes：
Acquiring unit, for obtaining the system information block of access network broadcast；
Judging unit, for judging that whether comprising gravity treatment in described system information block controls designator；
Replacement unit, for if it is determined that comprising gravity treatment in described system information block to control designator, then using replacement terminal gravity treatment
The mode of the threshold value of the access network of Target cell carry out cell reselection；
Wherein, described replacement unit is further used for the side using the threshold value of the access network of Target cell replacing terminal gravity treatment
Formula, the priority relationship between the access network of the Target cell according to terminal gravity treatment and the access network of current area carries out cell weight
Choosing；
When the access network of the Target cell of terminal gravity treatment is higher than the priority between the access network of current area, for low preferential
The terminal of level access network, by the way of the threshold value replacing with the access network of Target cell of higher terminal gravity treatment, to increase
Plus the terminal gravity treatment of described low priority access network is to the difficulty of high priority access network；Or, when the target of terminal gravity treatment is little
When the access network in area is lower than the priority between the access network of current area, for the terminal of high priority access network, using replacing
It is changed to the mode of the relatively low threshold value of the access network of the Target cell of terminal gravity treatment, and carry out the mode of gravity treatment according to probability,
To reduce the terminal gravity treatment of described high priority access network to the difficulty of low priority access network.
5. heterogeneous-cellulmulti-mode multi-mode single-standby terminal as claimed in claim 4 cell reselection device it is characterised in that
Described replacement unit, further specifically for the Target cell when terminal gravity treatment access network than current area access network
Between priority low when, for the terminal of high priority access network, using the Target cell replacing with relatively low terminal gravity treatment
The threshold value of access network mode, and, with probability P (RRAT K,ΔT1) gravity treatment is to low priority access network, described to reduce
The terminal gravity treatment of high priority access network is to the difficulty of low priority access network；If K is the network identity of access network, RRAT KFor connecing
The received signal power of networking K；ThreshRAT K,1And ThreshRAT K,2Thresholding 1 for access network K and thresholding 2, Δ T1Be on the occasion of
Thresholding increment, Δ T1Reference value be thresholding ThreshRAT K,110% to 20%, then：
6. a kind of cell reselection system of heterogeneous-cellulmulti-mode multi-mode single-standby terminal is it is characterised in that described isomery cellular network
Multimode list treats that the cell reselection system of terminal includes：Access network equipment and terminal, wherein, described terminal includes claim 4-5
Any one of heterogeneous-cellulmulti-mode multi-mode single-standby terminal cell reselection device；
Described access network equipment, during for judging that access network overload or there is overload risk, broadcasts in system information block
Gravity treatment controls designator；Wherein, the parameter being judged at least includes：The occupancy of the Traffic Channel of access network, access network
Attached users and the load condition of portfolio, the node pool of core network area of access network.
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| US9655022B2 (en) | 2014-10-30 | 2017-05-16 | Acer Incorporated | Method of cell reselection |
| TWI566612B (en) * | 2014-10-30 | 2017-01-11 | 宏碁股份有限公司 | Method of cell reselection |
| CN108307460A (en) * | 2017-01-11 | 2018-07-20 | 北京佰才邦技术有限公司 | A kind of cell switching method, terminal and base station |
| WO2021243636A1 (en) * | 2020-06-04 | 2021-12-09 | Qualcomm Incorporated | Inter-radio access technology reselection |
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| CN1838817A (en) * | 2005-03-22 | 2006-09-27 | 大唐移动通信设备有限公司 | A congestion control method |
| CN101500218A (en) * | 2008-02-02 | 2009-08-05 | 华为技术有限公司 | Method and apparatus for obtaining information in mobility management process |
| CN101626589A (en) * | 2009-08-10 | 2010-01-13 | 华为技术有限公司 | Load control method, apparatus and system |
| CN102474784A (en) * | 2009-08-11 | 2012-05-23 | 日本电气株式会社 | Inter-rat reselection/handover parameter optimisation |
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| US8467798B2 (en) * | 2007-08-20 | 2013-06-18 | Lg Electronics Inc. | Method of performing cell reselection in wireless communication system |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1838817A (en) * | 2005-03-22 | 2006-09-27 | 大唐移动通信设备有限公司 | A congestion control method |
| CN101500218A (en) * | 2008-02-02 | 2009-08-05 | 华为技术有限公司 | Method and apparatus for obtaining information in mobility management process |
| CN101626589A (en) * | 2009-08-10 | 2010-01-13 | 华为技术有限公司 | Load control method, apparatus and system |
| CN102474784A (en) * | 2009-08-11 | 2012-05-23 | 日本电气株式会社 | Inter-rat reselection/handover parameter optimisation |
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