CN109561466A - A kind of cell selecting method, device and terminal device - Google Patents
A kind of cell selecting method, device and terminal device Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0289—Congestion control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/20—Selecting an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
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Abstract
The embodiment of the invention discloses a kind of cell selecting method, device and terminal devices, this method comprises: receiving the release release message that network side equipment is sent, the release message carries at least one frequency point information；Target cell in the corresponding multiple cells of at least one described frequency point information initiates random access request, and receives congestion feedback；The channel parameter of the Target cell is updated, and cell is selected based on updated channel parameter.The method of the embodiment of the present invention solves the problems, such as to lead to network side it is possible that traffic congestion refusal terminal access since numerous users request to access the best cell of same signal in the prior art.
Description
Technical field
The present embodiments relate to field of communication technology more particularly to a kind of cell selecting methods, device and terminal device.
Background technique
Network is when issuing the frequency point information carried in release release message, the related ginseng of not specified network cell
Number, such as psc (primary scrambling code, scrambling code information) etc., terminal may search out multiple small with frequency in the region
Area, then in these cells, terminal can select best one cell, and current main chip business (can be received by RSCP
Signal code power or signal strength) or ECNO (signal quality) come selection signal intensity or the best cell of signal quality, and
The actual traffic load of cell is not accounted for.
But the user in the region, it may receive the frequency point that network issues when carrying out voice service and be searched later
Net, the best cell of the signal finally searched out are typically all same cell, therefore, in busy it is possible that numerous users ask
Ask the case where accessing same cell, lead to network side it is possible that traffic congestion, and in random access because
Congestion (obstruction) refusal.
Summary of the invention
The embodiment of the present invention provides a kind of cell selecting method, device and terminal device, with solve in the prior art due to
The best cell of the signal that numerous users request access same leads to network side it is possible that traffic congestion refusal terminal connects
The problem of entering.
In order to solve the above technical problems, the present invention is implemented as follows:
In a first aspect, providing a kind of cell selecting method, it is applied to terminal device, comprising:
The release release message that network side equipment is sent is received, the release message carries at least one frequency point letter
Breath；
Target cell in the corresponding multiple cells of at least one described frequency point information initiates random access request, and connects
Receive congestion feedback；
The channel parameter of the Target cell is updated, and cell is selected based on updated channel parameter.
Second aspect provides a kind of cell selecting apparatus, is applied to terminal device, comprising:
Receiving unit, for receiving the release release message of network side equipment transmission, the release message is carried
At least one frequency point information；
Access request initiates unit, for the Target cell in the corresponding multiple cells of at least one described frequency point information
Random access request is initiated, the receiving unit is for receiving congestion feedback；
Updating unit, for updating the channel parameter of the Target cell；
Selecting unit, for selecting cell based on updated channel parameter.
The third aspect also provides a kind of terminal device comprising processor, memory and is stored on the memory simultaneously
The computer program that can be run on the processor realizes such as first party when the computer program is executed by the processor
The step of method described in face.
Fourth aspect also provides a kind of computer-readable medium, stores computer program on the computer-readable medium,
The step of method as described in relation to the first aspect is realized when the computer program is executed by processor.
In embodiments of the present invention, it receives the release release message that network side equipment is sent and (carries at least one frequency point
Information) after, the Target cell in the corresponding multiple cells of at least one frequency point information initiates random access request, and is connecing
The channel parameter of more new target cell when receiving congestion feedback is initiated random with selecting cell according to updated channel parameter
Access request.In this way, when multi-user requests access signal best same cell in the presence of all, Target cell that can be best by signal
Signal quality or signal strength be updated, and reselected out according in the corresponding multiple cells of updated channel parameter
The best cell of signal carries out random access, other co-frequency cells accessed in same region so that user has an opportunity
(signal quality or the slightly worse cell of signal intensity ratio Target cell), solves in the prior art since numerous users request to connect
Entering the best cell of same signal leads to network side it is possible that the problem of traffic congestion refusal terminal accesses.
Detailed description of the invention
Fig. 1 is the schematic flow chart that voice service is carried out according to random access cell in the prior art；
Fig. 2 is the schematic flow chart of cell selecting method according to an embodiment of the invention；
Fig. 3 is the schematic flow chart of cell selecting method in accordance with another embodiment of the present invention；
Fig. 4 is the schematic flow chart of the cell selecting method of further embodiment according to the present invention；
Fig. 5 is the schematic flow chart of the cell selecting method of further embodiment according to the present invention；
Fig. 6 is the schematic flow chart of the cell selecting method of further embodiment according to the present invention；
Fig. 7 is the schematic flow chart of cell selecting method accord to a specific embodiment of that present invention；
Fig. 8 is the schematic block diagram of cell selecting apparatus according to an embodiment of the invention；
Fig. 9 is the structural schematic diagram of terminal device according to an embodiment of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on this hair
Embodiment in bright, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
The technical solution provided below in conjunction with attached drawing, each embodiment that the present invention will be described in detail.
CSFB is a kind of voice fallback technical solution, in current LTE (Long Term Evolution, long term evolution) net
In network, subnetwork, which is not yet disposed, provides IMS (IP Multimedia Subsystem, the IP multimedia subsystem of voice service
System) network element, PS (Packet Switch, packet switch) voice service is not supported, in this case, in order to ensure LTE user
Voice call function, 3GPP formulated CSFB relevant criterion, and user normally uses data service under LTE network, when sending out
When playing voice service (calling and called), CSFB process will be triggered, LTE network can issue RRC_RELEASE message, and the inside can carry
Redirect frequency point information, by user be assigned to some WCDMA (Wideband Code Division Multiple Access,
Wideband code division multiple access)/GSM (Global System for Mobile Communications, global system for mobile communications) is small
Area's frequency point is accessed, and terminal selects suitable cell to carry out random access after bottom measures the frequency point, complete in CS network
At voice call process.
Random access is that terminal keeps synchronous with network side from the realization that Idle state goes to connected state and establishes Radio Link
The process of link is that terminal is accessed to network request, receives the process that network responds and distributes random access channel.Wherein, eventually
Hold to network side send RRC_Request information, network side be normally received and reply RRC_connection_setup or
RRC_connection_reject message can send RRC_connection_setup_ if terminal receives the former
Complete message completes random access procedure.
In CSFB process, in the rrc_release message that LTE network issues, if carrying W frequency point information, if terminal
Suitable cell can be searched for up in corresponding frequency point, then complete random access, detailed process can be found in Fig. 1.
Network is when issuing the frequency point information carried in release release message, the related ginseng of not specified network cell
Number, terminal may search out multiple co-frequency cells in the region, then can select one of best (signal strength or signal quality)
Cell.And the user in the region is when carrying out voice service, receives and carries out searching net after the frequency point that network issues, and finally searches out
The best cell of signal be typically all same cell, accordingly, it is possible to which will appear numerous users all requests the same cell of access
Situation, leads to network side it is possible that traffic congestion, in random access because of congestion (obstruction) refusal, and same district
Other co-frequency cells in domain may be slightly worse due to signal, but more idle and no user is caused to access.
In order to solve the above technical problems, being applied to as shown in Fig. 2, the embodiment of the present invention provides a kind of cell selecting method
Terminal device, comprising:
Step 202. receives the release release message that network side equipment is sent, and release message carries at least one frequency
Point information.
Wherein, release message be network side equipment receive terminal device voice service when send, network side is set
Standby place network does not support PS voice service.
That is, terminal device initiates audio call (making a phone call) in LTE network cell or receives called (answering the call), LTE
Network issues release message, and terminal device is in 4G network, interaction from each other, be all by signaling message come.Than
As said, mobile phone all continues communicating with each other, network can issue a piece of news to mobile phone, allow mobile phone to do assorted with network
Operation, mobile phone also can report information to network, tell network its current situation.
Target cell of the step 204. in the corresponding multiple cells of at least one frequency point information initiates random access request,
And receive congestion feedback.
The channel parameter of step 206. more new target cell, and cell is selected based on updated channel parameter.
In this way, when multi-user requests access signal best same cell in the presence of all, Target cell that can be best by signal
Signal quality or signal strength be updated, and according to updated channel parameter reselect out the best cell of signal into
Row random access, so that user has an opportunity, (signal quality or signal are strong for other co-frequency cells accessed in same region
Spend the cell more slightly worse than Target cell), it is best to solve the signal for all request access same due to numerous users in the prior art
Cell lead to network side it is possible that traffic congestion refusal terminal access the problem of.
Wherein, as shown in figure 3, the Target cell initiation in the corresponding multiple cells of at least one frequency point information connects at random
Enter the operation before request can include:
Step 302. measures the channel parameter of the corresponding multiple cells of at least one frequency point information.Wherein, channel parameter can
Including signal quality (ECNO) or signal strength (RSCP).
Step 304. selection target cell, Target cell are the cell that channel parameter is best in multiple cells.
Terminal device can signal quality to the corresponding cell of at least one frequency point information or signal strength measure, and
It is ranked up according to signal quality or signal strength of the result of measurement to each cell, in order to select signal strength or letter
Number top-quality cell is accessed as Target cell for terminal device.
In the above-described embodiments, as shown in figure 4, the channel parameter of more new target cell, and joined based on updated channel
Number selection cell, it may include:
Channel parameter and default adjusting parameter of the step 402. according to Target cell, obtain destination channel parameter.
Step 404. is based in destination channel parameter and the corresponding multiple cells of at least one frequency point information except target is small
The channel parameter of other cells except area, the cell for selecting channel parameter best.
After measuring signal strength or signal quality best Target cell, it may can all request to connect due to numerous users
Enter in the Target cell, it is thereby possible to lead to the heavy traffic of Target cell and the Target cell can not be accessed by forming blocking, together
When, other cells especially signal quality or intensity is relatively good, but compared to for Target cell, signal quality or intensity are slightly worse
Cell (suboptimum cell) is more idle.At this point, the signal quality of Target cell or signal strength can be lowered (according to target
The channel parameter of cell and default adjusting parameter, obtain destination channel parameter), according to the signal matter of the Target cell after downward
Amount or intensity are resequenced and (are removed according in destination channel parameter and the corresponding multiple cells of at least one frequency point information
The best cell of the channel parameter selection channel parameter of other cells except Target cell), to select the confession of suboptimum cell
Terminal device access is prepared.
It should be noted that the channel parameter of Target cell is likely to after the channel parameter to Target cell updates
Lower than the channel parameter of suboptimum cell, at this point, can be selected according to the comparison result of updated each cell channel parameter
Suboptimum cell is accessed for terminal device out, is accessed for terminal device so as to improving other cells in addition to Target cell
Probability.
In this way, when multi-user requests access signal best same cell in the presence of all, Target cell that can be best by signal
Signal strength or quality lower (or update), and in the corresponding multiple cells of at least one frequency point information after downward again
It selects the best cell of signal and carries out random access, other same frequencies accessed in same region so that user has an opportunity
Cell (channel parameter is more slightly worse than Target cell) solves in the prior art since numerous users request to access same signal
Best cell leads to network side it is possible that the problem of traffic congestion refusal terminal accesses.
In the above-described embodiments, based in destination channel parameter and the corresponding multiple cells of at least one frequency point information
The channel parameter of other cells in addition to Target cell, the cell for selecting channel parameter best, comprising:
If its in destination channel parameter and the corresponding multiple cells of at least one frequency point information in addition to Target cell
The channel parameter of his cell is respectively less than preset threshold, then the channel ginseng based on the corresponding multiple cells of at least one frequency point information
Number, the cell for selecting channel parameter best.Alternatively,
If its in destination channel parameter and the corresponding multiple cells of at least one frequency point information in addition to Target cell
At least one of channel parameter of his cell is higher than preset threshold, then is based on destination channel parameter and at least one frequency point
The channel parameter of other cells in the corresponding multiple cells of information in addition to Target cell selects best small of channel parameter
Area.
That is, after the signal quality or signal strength of Target cell update, then it is again small to updated target
Area and other cells (cell i.e. in the corresponding multiple cells of at least one frequency point information in addition to Target cell) are arranged
Sequence, in fact mainly to updated Target cell and inferior to the signal quality between the suboptimum cell of Target cell (before update)
Or intensity is compared.It is illustrated for being compared to updated Target cell and suboptimum cell, if suboptimum is small
The channel parameter of area and Target cell is below preset threshold, then illustrates that the signal of suboptimum cell is poor, be also not suitable for for end
End equipment access, therefore, the risk that terminal device is linked into congested cell (Target cell) is lower than instead to be linked into signal and compares
The risk of the suboptimum cell of difference.At this point, can be according to the channel quality or intensity (before update) of Target cell script and other cells
Channel quality or intensity be compared, select suitable cell and initiate random access request.
Certainly, if after the channel parameter of more new target cell, the channel of updated Target cell and suboptimum cell is joined
Number is not below preset threshold, at this point, can then be compared according to updated Target cell and suboptimum cell, after selection updates
Target cell or suboptimum cell initiate random access request.
Therefore, it is based on removing Target cell in destination channel parameter and the corresponding multiple cells of at least one frequency point information
Except other cells channel parameter, select the best cell of channel parameter, may also comprise:
If updated Target cell and the channel parameter of suboptimum cell are respectively less than preset threshold, at least one frequency is selected
It puts the best cell of the channel parameter in the corresponding multiple cells of information and initiates random access request, suboptimum cell is channel parameter
Inferior to the cell of Target cell.Wherein, Target cell in the updated and the channel parameter of suboptimum cell are respectively less than preset threshold
In the case where, the cell for selecting the channel parameter of the corresponding cell of at least one frequency point information best initiates random access request
When, it needs to measure sequence to the channel parameter of the corresponding cell of at least one frequency point information again, wherein be believed with picking out
Number best cell.
If the channel parameter of updated Target cell is higher than the channel parameter of preset threshold or suboptimum cell higher than default
Threshold value then selects the cell that channel parameter is best in updated Target cell and suboptimum cell to initiate random access request.
It can be seen that the method for the embodiment of the present invention is carried out more by the channel parameter of the Target cell best to signal
Newly, so that suboptimum cell can not only be made to have an opportunity to carry out random access for terminal device, but also in the channel of suboptimum cell
In the case that parameter is bad, the case where avoiding terminal device from being linked into the suboptimum cell of signal difference generation.In this way, in heavy traffic
Region can improve success rate of communication to a certain extent, allow user to be linked into suboptimum cell and complete call, to solve
Lead to network side it is possible that business since numerous users request to access the best cell of same signal in the prior art
Congestion refuses the problem of terminal access.
In any of the above-described embodiment, as shown in figure 5, the mesh in the corresponding multiple cells of at least one frequency point information
It marks cell and initiates random access request, and after receiving congestion feedback, may also include that
Step 502. sets the when a length of preset time of the target timing device of Target cell, starts target timing device, and will
Target cell is added in the presets list.
Wherein, it is stored with that terminal device initiates random access request within a preset time but to receive congestion anti-in the presets list
The cell of feedback.Whether cell is busy or congestion is determined by network according to its corresponding load.
Wherein it is possible to which the frequency point information of Target cell and scrambling code information are added in the presets list.
Due to including the frequency point information of network in network side release release message, terminal device then can be according to receiving
Scrambling code information is searched for after corresponding frequency point information, i.e. which frequency point network signals terminal device removes, and terminal device then goes to search the frequency
Then point again calculates the signal quality of cell or intensity.
And because network signals terminal device is only frequency point information, scrambling code information is not arrived precisely, therefore, terminal device
Cell such as A, B, C different in a frequency point information can be searched out, for example frequency point information is 10833, the scrambling code information of cell A is 3,
The scrambling code information of cell B is 6, and the scrambling code information of cell C is 9.Network only informs that terminal device goes in frequency point information 10833 to search
Rope, terminal device can search out the different community that scrambling code on frequency point 10833 is respectively 3,6,9.
If step 504. target timing device time-out, Target cell is deleted from the presets list.
Generally, the service condition of different period, each cell may be different, for example, the mesh that signal is best
It is busier to mark cell business in first time period, at this point, being linked into Target cell, it is likely that because Target cell blocks
And refuse the random access request of terminal device, at this time, it may be necessary to which the signal quality or intensity to Target cell are updated, with choosing
Suboptimum cell is selected out to access for terminal device.And when arriving second time period, the best target cell traffic of possible signal is fewer,
It can relatively smoothly, there is no blocking, at this time, it is not necessary that small to the target at this point, being linked into Target cell
The signal quality or intensity in area are updated, and are accessed with selecting suboptimum cell for terminal device.It is necessary to set target is small
The corresponding timer in area, and start timer, it is whether overtime to calculate the time that Target cell is added in the presets list, thus
In case of overtime, the cell in the presets list is removed, does not influence the request access of next terminal device.That is, working as
The best cell of signal (such as Target cell) is added in the presets list due to traffic congestion, and a settable timer simultaneously opens
Dynamic timer, can be true according to the state of timer when terminal device initiates random access request again after standby a period of time
It is fixed whether the signal quality or intensity of Target cell to be updated.
Specifically, cell selecting method further includes the signal matter that the state based on timer determines whether more new target cell
Amount or signal strength.As shown in fig. 6, specifically including:
If timer in overtime state, removes the best cell of the channel parameter in the presets list, and select
The cell that channel parameter is best in the corresponding multiple cells of at least one frequency point information initiates random access request.
If timer is in the state having not timed out, the channel parameter of more new target cell, and is based on updated mesh
Mark other cells in the channel parameter and the corresponding multiple cells of at least one frequency point information of cell in addition to Target cell
Channel parameter, select the best cell of channel parameter to initiate random access request.
It should be understood that timer can be started after the best Target cell of signal is added to the presets list.Work as terminal device
When re-initiating access request (initiating audio call), at this point, illustrating the Target cell in the presets list if timer expiry
Signal quality or intensity may be not best at current time, even and if the Target cell in the presets list signal
Quality or intensity are best, but the business of Target cell may be not busy at this time, for terminal device access.Therefore, in timing
In the case where device time-out, signal quality in the presets list or the best cell of signal strength can be removed, and select again to
Signal quality or the best cell of signal strength initiate random access request in few corresponding multiple cells of a frequency point information.
And if timer has not timed out, default within the period that timer is set, Target cell remains as signal most
Good cell, and the business of Target cell is busier, at this point, the signal quality or intensity of Target cell can be lowered, with basis
The signal quality or intensity selection signal quality or signal of Target cell adjusted and other cells (mainly suboptimum cell)
The best cell of intensity initiates random access request.
Generally conventionally, as the time of the punishment timer T302 of network side may be shorter, and timer
Typically just prescribed terminal can not access the cell at the appointed time, therefore, in the prior art in terms of timer
Workflow not can be carried out judgement optimization.
And the method for the embodiment of the present invention can then determine whether the signal quality to Target cell according to the state of timer
Or intensity is adjusted, it is best to select signal according to the mode normally to sort respectively in the state of the difference of timer
Cell or according to the best cell of comparison selection signal of the Target cell after downward and other cells for terminal device
Access.To can not only make suboptimum cell have an opportunity to carry out random access for terminal device, but also in the letter of suboptimum cell
In the case that number quality or intensity are bad, the case where avoiding terminal device from being linked into the suboptimum cell of signal difference generation.
In any of the above-described embodiment, the channel parameter of more new target cell, it may include: the channel of Target cell is joined
Number subtracts default adjusting parameter (preset correction value), and obtaining destination channel parameter, (channel of i.e. updated Target cell is joined
Number).
Wherein, default adjusting parameter can be fixed value, for example, 3db, 3.1db, 3.2db, 4db etc..Alternatively, default
Adjusting parameter can be the number appeared in the presets list with cell in specified time and be positively correlated.The specified time is greater than default
Time.It appears in the presets list 1 time, subtracts for example, timer sets cell in duration 5 seconds, specified time 1 minute, 1 minute
3db；Occur 2 times, subtracts 6db, etc..Or say, default adjusting parameter can be according to the comparison of each cell of different zones
Difference is configured, and is not limited to some specific numerical value or numberical range.
As shown in fig. 7, the realization process of the cell selecting method of the embodiment of the present invention can be with are as follows:
First, terminal is initiated audio call in LTE cell or is received called.
Second, LTE network issues release message, carries WCDMA frequency point.
Third, terminal measures the frequency point information, and is ranked up, and selects the best cell ECNO A.
4th, random access request is initiated in cell A, due to heavy traffic in the cell A period, replys rrc_
Reject message and because congestion (congestion).
5th, a busy list (the presets list) is added in the information (frequency point and psc) of cell by terminal, and is started and determined
When device B (timer expiry, cell A information are removed in busy list).
6th, after standby a period of time, audio call is initiated again.It is when judging whether the timer expires or not, if overtime,
Busy list is then removed, carries out ranking cells selection (again to the signal of the corresponding cell of the frequency point information according to normal condition
Quality or intensity are ranked up, with the best cell of selection signal).
7th, if timer has not timed out, the ECNO (signal quality) of the cell A measured is subtracted into x db, then into
Row compares.
8th, the ECNO between modified cell is compared, ECNO whether below C value (preset threshold), if
Below C value then illustrates that time good cell signal quality is too poor, also improper, and the risk for being linked into congested cell, which is lower than, to be linked into
The risk of the very poor cell of signal quality, therefore cancel modified values, it is reduced into initial value and is compared, suitable cell is selected to connect at random
Enter.If ECNO is not below C value, selection suitable cell is carried out according to modified ECNO value.
It should be understood that the method for the embodiment of the present invention, which is mainly considered to exist in real net, " it is negative to cover preferable Zone
Lotus is higher, and it is more idle to cover slightly worse cell " this actual conditions, be if terminal side receives Reason For Denial
The rrc_reject message of congestion (cause 0) then increases a timer timer, during timer, measurement
When the signal strength or signal quality of the cell, by the signal strength or signal quality value of the best cell of subtraction signal,
The selected possibility of the cell is reduced, increases the possibility that terminal chooses other idle districts (suboptimum cell).
Simultaneously, it is contemplated that the possible signal in other co-frequency cells is particularly poor, therefore sets a minimum threshold C value, when most
When the cell signal quality (after modification) reported eventually is below threshold value, to avoid random access failure, then need to ignore possibility
It is congested the risk that cell is refused again, or is compared using the signal value before modification, suitable cell is selected.
In view of different terminals, when selecting suitable cell, reference standard is different, ECNO (signal quality), or
Person RSCP (signal strength), the overall plan based on ECNO and RSCP is identical, and difference is only that the former judgment criteria is to be based on
Signal quality measures, and the latter is based on signal strength measurement.
By taking ECNO as an example, X and B and C are assumed value:
Cell A and cell B belongs to co-frequency cell, and the ECNO of cell A is -15db, and the ECNO of cell B is -19db, for the first time
When initiating random access request, terminal selects cell A (signal quality is best), but is refused by cell A with network congestion, terminal
Cell A is added in busy list.Timer B is 30 minutes, when terminal next time initiates voice service again, cell A measurement
The ECNO arrived is -15db, and subtracting X (5db) afterwards is -20db, and the ECNO of cell B is still -19db, due to modified ECNO value
It is below -18db (C value), illustrates that time good cell quality is too poor, to avoid the occurrence of other call problems, selects modification under the scene
Preceding value is compared (ECNO of A is still -15db, and the ECNO of B is -19db), is still selection cell A.
Certainly, if the ECNO of cell A is -10db, the ECNO of cell B is -14db, then when selecting for second, due to
The ECNO of modified cell A be -15db, therefore, modified cell A, cell B ECNO be both greater than -18db (C value), but
The ECNO of cell B is greater than the ECNO of modified cell A, therefore, cell B can be selected to be accessed for terminal for the second time.
It is updated as a result, by the channel parameter of the Target cell best to signal, to can not only make suboptimum
Cell has an opportunity to carry out random access for terminal device, and in the case where the channel parameter of suboptimum cell is bad, avoids end
End equipment is linked into the generation of the case where suboptimum cell of signal difference.In this way, can change to a certain extent in heavy traffic region
Kind success rate of communication allows user to be linked into suboptimum cell and completes call, to solve in the prior art due to numerous users
All request, which accesses the best cell of same signal, leads to network side it is possible that the problem of traffic congestion refusal terminal accesses.
In addition, the method for the embodiment of the present invention can from CSFB process in, for the WCDMA cell of heavy traffic,
Certain optimization is carried out in the process of selection cell, it, can also and in other processes, such as when from CSFB to GSM network
Certain optimization is carried out using similar scheme.
As shown in figure 8, the embodiment of the present invention also provides a kind of cell selecting apparatus 800, it is applied to terminal device, comprising:
Receiving unit 802, for receiving the release release message of network side equipment transmission, release message carries at least one frequency
Point information；Access request initiates unit 804, for the Target cell hair in the corresponding multiple cells of at least one frequency point information
Random access request is played, receiving unit 802 can also be used to receive congestion feedback；Updating unit 806 is used for more new target cell
Channel parameter；Selecting unit 808, for selecting cell based on updated channel parameter.
Since cell selecting apparatus 800 receives the release release message that network side equipment is sent by receiving unit 802
After (carrying at least one frequency point information), it is corresponding more at least one frequency point information that unit 804 is initiated by access request
Target cell in a cell initiates random access request, and single by updating when receiving unit 802 receives congestion feedback
The channel parameter of first 806 more new target cells initiates random access request to select cell according to updated channel parameter.
In this way, when multi-user requests access signal best same cell in the presence of all, it can be by the signal matter of the best Target cell of signal
Amount or signal strength are updated, and best according to signal is reselected out in the corresponding multiple cells of updated channel parameter
Cell carry out random access other co-frequency cell (signal qualities accessed in same region so that user has an opportunity
Or the slightly worse cell of signal intensity ratio Target cell), it solves in the prior art since numerous users request access same
The best cell of signal leads to network side it is possible that the problem of traffic congestion refusal terminal accesses.
In the above-described embodiments, cell selecting apparatus 800 further includes measuring unit 810, for measuring at least one frequency point
The channel parameter of the corresponding cell of information, channel parameter include signal quality or signal strength.Selecting unit is then used to select mesh
Cell is marked, Target cell is the cell that channel parameter is best in multiple cells.Wherein, updating unit 806 is also used to according to target
The channel parameter of cell and default adjusting parameter, obtain destination channel parameter.Selecting unit 808 is then also used to based on destination channel
The channel parameter of other cells in parameter and the corresponding multiple cells of at least one frequency point information in addition to Target cell,
The cell for selecting channel parameter best initiates random access request.
It, can be by updating unit 806 by signal in this way, when multi-user requests access signal best same cell in the presence of all
The signal strength or quality of best Target cell update, and at least one frequency point letter by selecting unit 808 in the updated
It ceases and reselects out the best cell progress random access of signal in corresponding multiple cells, so that user has an opportunity
Access solves in the prior art with other co-frequency cells (signal quality is more slightly worse than Target cell) in region due to numerous use
The best cell of the signal that family all requests access same leads to network side it is possible that traffic congestion refusal terminal access is asked
Topic.
In above-mentioned further embodiment, selecting unit 808 is also used to: if destination channel parameter and at least one
The channel parameter of other cells in the corresponding multiple cells of frequency point information in addition to Target cell is respectively less than preset threshold, then base
In the channel parameter of the corresponding multiple cells of at least one frequency point information, the cell for selecting channel parameter best；Alternatively, if target
The channel of other cells in channel parameter and the corresponding multiple cells of at least one frequency point information in addition to Target cell is joined
At least one of number is higher than preset threshold, then corresponding multiple based on destination channel parameter and at least one frequency point information
The channel parameter of other cells in cell in addition to Target cell, the cell for selecting channel parameter best.Updating unit 806 is also
It is configured to subtract the channel parameter of Target cell into default adjusting parameter (i.e. preset correction value) and obtains updated Target cell
Channel parameter.Default adjusting parameter can be fixed value, alternatively, default adjusting parameter can be to go out with cell in specified time
Number in present the presets list is positively correlated, which is greater than preset time, or says, default adjusting parameter can basis
The comparison difference of each cell of different zones is configured, and is not limited to some specific numerical value or numberical range.
It should be understood that the signal quality or intensity by the Target cell best to signal are updated, thus not only can be with
So that other cells such as suboptimum cell has an opportunity to carry out random access for terminal device, and in the signal quality of suboptimum cell or
In the case that intensity is bad, the case where avoiding terminal device from being linked into the suboptimum cell of signal difference generation.In this way, in heavy traffic
Region can improve success rate of communication to a certain extent, allow user to be linked into suboptimum cell and complete call, to solve
Lead to network side it is possible that business since numerous users request to access the best cell of same signal in the prior art
Congestion refuses the problem of terminal access.
The device of the embodiment of the present invention further includes control unit 812, for set Target cell target timing device when
A length of preset time starts target timing device, and Target cell is added in the presets list.Wherein, it is stored in the presets list
There is the terminal device to initiate random access request within a preset time but receives the cell of congestion feedback.
The service condition of section in different times, each cell may be different, for example, signal it is best target it is small
Area's business in first time period is busier, at this point, being linked into Target cell, it is likely that refuses because Target cell blocks
The random access request of exhausted terminal device, at this time, it may be necessary to which the signal quality or intensity to Target cell are updated, to select
Suboptimum cell is accessed for terminal device.And when arriving second time period, the best target cell traffic of possible signal is fewer, this
When, being linked into Target cell can relatively smoothly, there is no blocking, at this time, it is not necessary that the Target cell
Signal quality or intensity be updated, with select suboptimum cell for terminal device access.
And by the setting of timer, the cell being added in the presets list can be deleted according to the state of timer
Remove, or according to the state of timer whether directly determine to timer corresponding to the channel parameter of cell be updated.From
And can in the state of the difference of timer, respectively according to the mode that normally sorts select the best cell of signal or according to
The best cell of the comparison selection signal of updated Target cell and other cells is accessed for terminal device.To not only
Can make suboptimum cell have an opportunity for terminal device carry out random access, and the signal quality of suboptimum cell or intensity not
In the case where good, the case where avoiding terminal device from being linked into the suboptimum cell of signal difference generation.
The hardware structural diagram of Fig. 9 terminal device of embodiment to realize the present invention.As shown in figure 9, the terminal device
900 include but is not limited to: radio frequency unit 901, network module 902, audio output unit 903, input unit 904, sensor
905, display unit 906, user input unit 907, interface unit 908, memory 909, processor 910 and power supply 911 etc.
Component.It will be understood by those skilled in the art that terminal device structure shown in Fig. 9 does not constitute the restriction to terminal device,
Terminal device may include perhaps combining certain components or different component layouts than illustrating more or fewer components.?
In the embodiment of the present invention, terminal device includes but is not limited to mobile phone, tablet computer, laptop, palm PC, vehicle-mounted end
End, wearable device and pedometer etc..
Wherein, processor 910, for executing following methods:
The release release message that network side equipment is sent is received, release message carries at least one frequency point information；
Target cell in the corresponding multiple cells of at least one described frequency point information initiates random access request, and connects
Receive congestion feedback；
The channel parameter of the Target cell is updated, and cell is selected based on updated channel parameter.
The method of the embodiment of the present invention receives the release release message that network side equipment is sent and (carries at least one frequency
Point information) after, the Target cell initiation random access request in the corresponding multiple cells of at least one frequency point information, and
The channel parameter of more new target cell when receiving congestion feedback, with according to updated channel parameter select cell, initiate with
Machine access request.In this way, when multi-user requests access signal best same cell in the presence of all, it can be small by the best target of signal
The signal quality or signal strength in area are updated, and are reselected according in the corresponding multiple cells of updated channel parameter
The best cell of signal carries out random access, other co-frequency cells accessed in same region so that user has an opportunity out
(signal quality or the slightly worse cell of signal intensity ratio Target cell), solves in the prior art since numerous users request to connect
Entering the best cell of same signal leads to network side it is possible that the problem of traffic congestion refusal terminal accesses.
It should be understood that the embodiment of the present invention in, radio frequency unit 901 can be used for receiving and sending messages or communication process in, signal
Send and receive, specifically, by from base station downlink data receive after, to processor 910 handle；In addition, by uplink
Data are sent to base station.In general, radio frequency unit 901 includes but is not limited to antenna, at least one amplifier, transceiver, coupling
Device, low-noise amplifier, duplexer etc..In addition, radio frequency unit 901 can also by wireless communication system and network and other set
Standby communication.
Terminal device provides wireless broadband internet by network module 902 for user and accesses, and such as user is helped to receive
It sends e-mails, browse webpage and access streaming video etc..
Audio output unit 903 can be received by radio frequency unit 901 or network module 902 or in memory 909
The audio data of storage is converted into audio signal and exports to be sound.Moreover, audio output unit 903 can also provide and end
The relevant audio output of specific function that end equipment 900 executes is (for example, call signal receives sound, message sink sound etc.
Deng).Audio output unit 903 includes loudspeaker, buzzer and receiver etc..
Input unit 904 is for receiving audio or video signal.Input unit 904 may include graphics processor
(Graphics Processing Unit, GPU) 9041 and microphone 9042, graphics processor 9041 is in video acquisition mode
Or the image data of the static images or video obtained in image capture mode by image capture apparatus (such as camera) carries out
Reason.Treated, and picture frame may be displayed on display unit 906.Through graphics processor 9041, treated that picture frame can be deposited
Storage is sent in memory 909 (or other storage mediums) or via radio frequency unit 901 or network module 902.Mike
Wind 9042 can receive sound, and can be audio data by such acoustic processing.Treated audio data can be
The format output that mobile communication base station can be sent to via radio frequency unit 901 is converted in the case where telephone calling model.
Terminal device 900 further includes at least one sensor 905, such as optical sensor, motion sensor and other biographies
Sensor.Specifically, optical sensor includes ambient light sensor and proximity sensor, wherein ambient light sensor can be according to environment
The light and shade of light adjusts the brightness of display panel 9061, and proximity sensor can close when terminal device 900 is moved in one's ear
Display panel 9061 and/or backlight.As a kind of motion sensor, accelerometer sensor can detect in all directions (general
For three axis) size of acceleration, it can detect that size and the direction of gravity when static, can be used to identify terminal device posture (ratio
Such as horizontal/vertical screen switching, dependent game, magnetometer pose calibrating), Vibration identification correlation function (such as pedometer, tap)；It passes
Sensor 905 can also include fingerprint sensor, pressure sensor, iris sensor, molecule sensor, gyroscope, barometer, wet
Spend meter, thermometer, infrared sensor etc., wherein infrared sensor can by emit and receive infrared light measurement object and
The distance between terminal device, details are not described herein.
Display unit 906 is for showing information input by user or being supplied to the information of user.Display unit 906 can wrap
Display panel 9061 is included, liquid crystal display (Liquid Crystal Display, LCD), Organic Light Emitting Diode can be used
Forms such as (Organic Light-Emitting Diode, OLED) configure display panel 9061.
User input unit 907 can be used for receiving the number or character information of input, and generate the use with terminal device
Family setting and the related key signals input of function control.Specifically, user input unit 907 include touch panel 9071 and
Other input equipments 9072.Touch panel 9071, also referred to as touch screen collect the touch operation of user on it or nearby
(for example user uses any suitable objects or attachment such as finger, stylus on touch panel 9071 or in touch panel 9071
Neighbouring operation).Touch panel 9071 may include both touch detecting apparatus and touch controller.Wherein, touch detection
Device detects the touch orientation of user, and detects touch operation bring signal, transmits a signal to touch controller；Touch control
Device processed receives touch information from touch detecting apparatus, and is converted into contact coordinate, then gives processor 910, receiving area
It manages the order that device 910 is sent and is executed.Furthermore, it is possible to more using resistance-type, condenser type, infrared ray and surface acoustic wave etc.
Seed type realizes touch panel 9071.In addition to touch panel 9071, user input unit 907 can also include other input equipments
9072.Specifically, other input equipments 9072 can include but is not limited to physical keyboard, function key (such as volume control button,
Switch key etc.), trace ball, mouse, operating stick, details are not described herein.
Further, touch panel 9071 can be covered on display panel 9061, when touch panel 9071 is detected at it
On or near touch operation after, send processor 910 to determine the type of touch event, be followed by subsequent processing device 910 according to touching
The type for touching event provides corresponding visual output on display panel 9061.Although in Fig. 9, touch panel 9071 and display
Panel 9061 is the function that outputs and inputs of realizing terminal device as two independent components, but in some embodiments
In, can be integrated by touch panel 9071 and display panel 9061 and realize the function that outputs and inputs of terminal device, it is specific this
Place is without limitation.
Interface unit 908 is the interface that external device (ED) is connect with terminal device 900.For example, external device (ED) may include having
Line or wireless head-band earphone port, external power supply (or battery charger) port, wired or wireless data port, storage card end
Mouth, port, the port audio input/output (I/O), video i/o port, earphone end for connecting the device with identification module
Mouthful etc..Interface unit 908 can be used for receiving the input (for example, data information, electric power etc.) from external device (ED) and
By one or more elements that the input received is transferred in terminal device 900 or can be used in 900 He of terminal device
Data are transmitted between external device (ED).
Memory 909 can be used for storing software program and various data.Memory 909 can mainly include storing program area
The storage data area and, wherein storing program area can (such as the sound of application program needed for storage program area, at least one function
Sound playing function, image player function etc.) etc.；Storage data area can store according to mobile phone use created data (such as
Audio data, phone directory etc.) etc..In addition, memory 909 may include high-speed random access memory, it can also include non-easy
The property lost memory, a for example, at least disk memory, flush memory device or other volatile solid-state parts.
Processor 910 is the control centre of terminal device, utilizes each of various interfaces and the entire terminal device of connection
A part by running or execute the software program and/or module that are stored in memory 909, and calls and is stored in storage
Data in device 909 execute the various functions and processing data of terminal device, to carry out integral monitoring to terminal device.Place
Managing device 910 may include one or more processing units；Preferably, processor 910 can integrate application processor and modulatedemodulate is mediated
Manage device, wherein the main processing operation system of application processor, user interface and application program etc., modem processor is main
Processing wireless communication.It is understood that above-mentioned modem processor can not also be integrated into processor 910.
Terminal device 900 can also include the power supply 911 (such as battery) powered to all parts, it is preferred that power supply 911
Can be logically contiguous by power-supply management system and processor 910, to realize management charging by power-supply management system, put
The functions such as electricity and power managed.
In addition, terminal device 900 includes some unshowned functional modules, details are not described herein.
Preferably, the embodiment of the present invention also provides a kind of terminal device, may include processor 910, and memory 909 is deposited
The computer program that can be run on memory 909 and on the processor 910 is stored up, the computer program is by processor 910
Each process of above-mentioned Fig. 2 to embodiment of the method shown in Fig. 7 is realized when execution, and can reach identical technical effect, to keep away
Exempt to repeat, which is not described herein again.
The embodiment of the present invention also provides a kind of computer readable storage medium, and meter is stored on computer readable storage medium
Calculation machine program, the computer program realize each process of above-mentioned Fig. 2 to method shown in Fig. 7, and energy when being executed by processor
Reach identical technical effect, to avoid repeating, which is not described herein again.Wherein, the computer readable storage medium, such as only
Read memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk
Or CD etc..
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
It should also be noted that, the terms "include", "comprise" or its any other variant are intended to nonexcludability
It include so that the process, method, commodity or the equipment that include a series of elements not only include those elements, but also to wrap
Include other elements that are not explicitly listed, or further include for this process, method, commodity or equipment intrinsic want
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including described want
There is also other identical elements in the process, method of element, commodity or equipment.
It will be understood by those skilled in the art that the embodiment of the present invention can provide as method, system or computer program product.
Therefore, complete hardware embodiment, complete software embodiment or embodiment combining software and hardware aspects can be used in the present invention
Form.It is deposited moreover, the present invention can be used to can be used in the computer that one or more wherein includes computer usable program code
The shape for the computer program product implemented on storage media (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
Formula.
The above description is only an embodiment of the present invention, is not intended to restrict the invention.For those skilled in the art
For, the invention may be variously modified and varied.All any modifications made within the spirit and principles of the present invention are equal
Replacement, improvement etc., should be included within scope of the presently claimed invention.
Claims (14)
1. a kind of cell selecting method is applied to terminal device, comprising:
The release release message that network side equipment is sent is received, the release message carries at least one frequency point information；
Target cell in the corresponding multiple cells of at least one described frequency point information initiates random access request, and receives
Congestion feedback；
The channel parameter of the Target cell is updated, and cell is selected based on updated channel parameter.
2. the method according to claim 1, wherein in the corresponding multiple cells of at least one described frequency point information
In Target cell initiate random access request before, comprising:
The channel parameter of the corresponding multiple cells of at least one described frequency point information is measured, the channel parameter includes signal quality
Or signal strength；
The Target cell is selected, the Target cell is the cell that channel parameter is best in the multiple cell.
3. the method according to claim 1, wherein updating the channel parameter of the Target cell, and based on more
Channel parameter after new selects cell, comprising:
According to the channel parameter of the Target cell and default adjusting parameter, destination channel parameter is obtained；
It is small based on the target is removed in the destination channel parameter and the corresponding multiple cells of at least one described frequency point information
The channel parameter of other cells except area, the cell for selecting channel parameter best.
4. according to the method described in claim 3, it is characterized in that, it is described based on the destination channel parameter and it is described extremely
The channel parameter of other cells in few corresponding multiple cells of a frequency point information in addition to the Target cell, selects channel
The best cell of parameter, comprising:
If removing the Target cell in the destination channel parameter and the corresponding multiple cells of at least one described frequency point information
Except the channel parameters of other cells be respectively less than preset threshold, then it is corresponding multiple small based at least one described frequency point information
The channel parameter in area, the cell for selecting channel parameter best；Alternatively,
If removing the Target cell in the destination channel parameter and the corresponding multiple cells of at least one described frequency point information
Except at least one of the channel parameter of other cells be higher than the preset threshold, then be based on the destination channel parameter,
And the channel ginseng of other cells in the corresponding multiple cells of described at least one frequency point information in addition to the Target cell
Number, the cell for selecting channel parameter best.
5. the method according to claim 1, wherein in the corresponding multiple cells of at least one described frequency point information
In Target cell initiate random access request, and after receiving congestion feedback, the method also includes:
The when a length of preset time for setting the target timing device of the Target cell starts the target timing device, and will be described
Target cell is added in the presets list；
Wherein, it is stored with the terminal device in described the presets list and initiates random access request but receipts in the preset time
To the cell of congestion feedback.
6. method as claimed in claim 5, after the Target cell is added in the presets list, the method is also wrapped
It includes:
If the target timing device time-out, the Target cell is deleted from described the presets list.
7. a kind of cell selecting apparatus is applied to terminal device, comprising:
Receiving unit, for receiving the release release message of network side equipment transmission, the release message is carried at least
One frequency point information；
Access request initiates unit, initiates for the Target cell in the corresponding multiple cells of at least one described frequency point information
Random access request, the receiving unit is for receiving congestion feedback；
Updating unit, for updating the channel parameter of the Target cell；
Selecting unit, for selecting cell based on updated channel parameter.
8. device according to claim 7, which is characterized in that further include:
Measuring unit, for measuring the channel parameter of the corresponding multiple cells of at least one described frequency point information, the channel ginseng
Number includes signal quality or signal strength；
For the selecting unit for selecting the Target cell, the Target cell is that channel parameter is best in the multiple cell
Cell.
9. device according to claim 7, it is characterised in that:
The updating unit is used for channel parameter and default adjusting parameter according to the Target cell, obtains destination channel ginseng
Number；
The selecting unit is also used to corresponding multiple based on the destination channel parameter and at least one described frequency point information
The channel parameter of other cells in cell in addition to the Target cell, the cell initiation for selecting channel parameter best connect at random
Enter request.
10. device according to claim 9, which is characterized in that the selecting unit is also used to:
If removing the Target cell in the destination channel parameter and the corresponding multiple cells of at least one described frequency point information
Except the channel parameters of other cells be respectively less than preset threshold, then it is corresponding multiple small based at least one described frequency point information
The channel parameter in area, the cell for selecting channel parameter best；Alternatively,
If removing the Target cell in the destination channel parameter and the corresponding multiple cells of at least one described frequency point information
Except at least one of the channel parameter of other cells be higher than the preset threshold, then be based on the destination channel parameter,
And the channel ginseng of other cells in the corresponding multiple cells of described at least one frequency point information in addition to the Target cell
Number, the cell for selecting channel parameter best.
11. device according to claim 7, which is characterized in that further include:
Control unit, the when a length of preset time of the target timing device for setting the Target cell, it is fixed to start the target
When device, and the Target cell is added in the presets list；
Wherein, it is stored with the terminal device in described the presets list and initiates random access request but receipts in the preset time
To the cell of congestion feedback.
12. device according to claim 11, it is characterised in that:
If described control unit is also used to the target timing device time-out, the Target cell is deleted from described the presets list
It removes.
13. a kind of terminal device, which is characterized in that including processor, memory and be stored on the memory and can be in institute
The computer program run on processor is stated, such as claim 1 to 6 is realized when the computer program is executed by the processor
Any one of described in method the step of.
14. a kind of computer-readable medium, which is characterized in that computer program is stored on the computer-readable medium, it is described
The step of method as described in right wants any one of 1 to 6 is realized when computer program is executed by processor.
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| CN110167048A (en) * | 2019-05-23 | 2019-08-23 | 中国联合网络通信集团有限公司 | A kind of communication means and system, base station, mobile switching centre |
| CN110167048B (en) * | 2019-05-23 | 2022-03-04 | 中国联合网络通信集团有限公司 | Communication method and system, base station and mobile switching center |
| WO2021004272A1 (en) * | 2019-07-10 | 2021-01-14 | 维沃移动通信有限公司 | Random access method and device |
| CN113099483A (en) * | 2019-12-23 | 2021-07-09 | 维沃移动通信有限公司 | Method for processing cell congestion, terminal and network side equipment |
| CN112969219A (en) * | 2021-02-08 | 2021-06-15 | 北京紫光展锐通信技术有限公司 | Network searching processing method, device, equipment, storage medium and program product |
| WO2022237442A1 (en) * | 2021-05-10 | 2022-11-17 | Oppo广东移动通信有限公司 | Cell selection method and apparatus, and storage medium |
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