CN101072436B - Two-hop cellular relay network switching method for base station integrated control - Google Patents
Two-hop cellular relay network switching method for base station integrated control Download PDFInfo
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Abstract
The method includes steps: (1) constructing cost function corresponding to following different application scenes including measured results of synthesis mobile station, switching types, mobility of mobile station, and one or more types of current service; (2) based on the constructed cost function to calculate minimal cost function (MCF) values of users' links to be selected, and calculate cost function of current user's link; (3) when MCF value of a user's link to be selected is smaller than cost function of current user's link, then, the method requests the mobile station to switch to target access station corresponding to the user's link with lowest MCF.
Description
Technical field
The present invention relates to a kind of changing method that is applicable to the central controlled two-hop cellular junction network in base station.
Background technology
Along with the continuous development of broadband wireless communication technique, following cordless communication network constantly increases the demand of high-speed data service, also the enhancing of performances such as throughput of system and coverage is had higher requirement simultaneously.This not only need adopt advanced transmission technology, also needs new network architecture support.In traditional cellular network, introduce relaying technique; Not only can promote the user's data transmission rate; Can also enlarge the coverage of radio communication and then reach the characteristic of consistent message transmission rate (uniform data rate); Thereby remedying the deficiency of existing system, reduce network investment and operation cost, is the following cordless communication network framework of a kind of very attractive and competitiveness therefore.
In cell mobile communication systems; The mobility at terminal and the time variation of radio propagation channel can influence the transmission quality of the current link of user in real time; For guaranteeing that the user remains normal communication; System need immediately adjust and sets up new communication link according to the variation of network state, and realizes taking over seamlessly between new old link.Switching is as an important mobile management function, also is a key feature of GSM simultaneously, and its flow process provides and triggering and decision-making mechanism will directly influence the performance of whole system.
The application of relaying technique has brought new challenge also for the handover mechanism and the decision-making technique of cellular network, and original handover mechanism can't adapt to new system requirements.
At first, in the legacy cellular mobile communications network, switch and only between source base station, the three kinds of network elements in purpose base station and terminal, carry out.Introducing along with relaying technique; In network except original base station, terminal; Also increased this new network element of relay station, and the path of transmission has also increased the repeated link between base station and the relay station, and the user link between relay station and the user thereupon; It is thus clear that because the increase of changeable target and network topology is complicated, the switching of honeycomb junction network will be complicated more than conventional cellular network.
Secondly, different with existing cellular network, owing to introduced relay station, will there be polytype switching in the user link in the honeycomb junction network.Except the switching between the base station, the user also possibly switched between the base station of neighbor cell and relay station, relay station and relay station.And switch and not only can occur in the cell boarder place, also may occur in inside, sub-district, promptly switch between base station and relay station, relay station and the relay station of user in same sub-district.
No matter be which type switching, all need when the change communication link, still can converse normally, but also will accomplish fast, effectively so just to help reducing whole system and disturb, reduce call drop, improve power system capacity.
Obviously, handover mechanism and decision-making technique between traditional different districts base station have not been suitable for the honeycomb junction network, so should rethink at the switching problem of introducing under the relaying technique situation to the characteristics of honeycomb junction network.
Therefore; A kind of new changing method is provided; Can optimize handover trigger and decision-making technique according to current network state information and the characteristics of switching to the honeycomb junction network simultaneously, as far as possible rationally, effectively utilize limited system resource; Improve transmission rate, communication quality and network capacity, become a right basic problem of two-hop cellular relay system demand side.
Summary of the invention
To the problem that exists in the demand of two-hop cellular relay system and the prior art; The present invention proposes the switch triggering method and the handover decisions method of the central controlled two-hop cellular relay system of a kind of BS of being applicable to; When considering to switch the front and back transmission quality; According to the new feature that is had that the two-hop cellular network is compared with conventional cellular network at aspects such as network topologies, taken into account the time-delay and the signaling consumption thereof that switch, reduced handoff request rate and handover failure rate; Improve resource utilization, guaranteed the telecommunication service quality of user under mobile environment.And through compromise consideration to algorithm complex and performance gain; When improving performance of handoffs, reduce extra network signal load as far as possible; Get increasing substantially of systematic function in return with few feedback information, performance cost has stronger practicality than high.
According to the present invention, a kind of switch triggering method that is used for the central controlled two-hop cellular junction network in base station is provided, comprise step:
(1) to different concrete application scenarioss, one or more in the mobility of comprehensive moving station measuring result, switching type, handoff failure information, mobile radio station and the present type of service make up corresponding cost function;
(2), and calculate the cost function value of active user's link according to the minimum cost functional value of each alternative user link of cost function calculation of said structure;
(3) at the minimum cost functional value of said alternative user link during less than the cost function value of said active user's link, the corresponding target access station of user link that request switches to mobile radio station and cost function value is minimum.
Wherein in step (2),, obtain the minimum cost functional value of each alternative user link through calculating the cost function value of the user link between mobile radio station and the access station, and
Through calculating the cost function value of the user link between mobile radio station and the alternative access station, obtain the cost function value of active user's link.
Wherein said access station is base station or relay station, and said alternative access station and said target access station are base station and relay station in this sub-district, or the base station of neighbor cell and relay station.
Wherein in step (1),, obtain said moving station measuring result through measuring link-quality between each access station in mobile radio station and the alternative access station.
Wherein said switching type comprises:
Switching, switching from relay station to base station and the switching from relay station to relay station of mobile radio station from the base station to the relay station in the sub-district, switching, switching from this cell base station to neighbor cell relay station, switching from this sub-district relay station to neighbor cell base station, the switching from this sub-district relay station to neighbor cell relay station of mobile radio station between neighbor cell from this cell base station to neighbor cell base station.
Wherein in step (1),, obtain the mobility of said mobile radio station through measuring the translational speed of mobile radio station.
Wherein said type of service is the type of service of in concrete network, stipulating.
Said switch triggering method also comprises step:
When said target access station does not allow said mobile radio station to insert, send the handoff failure notice to said handover trigger module, and said handover trigger module is upgraded and the corresponding handoff failure information of said switching;
Based on the handoff failure information after the said renewal, execution in step (2), (3), and when said target access station allowed said mobile radio station to insert, the notice upper layer entity was carried out corresponding the processing.
Said handover trigger module is positioned at mobile radio station side or network side.
Calculate the cost function of each alternative user link according to following formula:
Wherein, S
lFor setting up from said mobile radio station to alternative access station r
kThe corresponding required hand off signaling expense of switching type of alternative user link l, P
lBe the received power that from the measurement result of each alternative user link, obtains,
μ, λ and ω are weight factor, and μ, and ω all can be according to the type of service adaptive configuration of current to be switched mobile radio station,
V
MSBe the speed modifying factor, the numerical value of said velocity factor is by concrete equipment and network based v
MSSet v
MSPresent speed for to be switched mobile radio station MS;
Wherein calculate the cost function of active user's link according to following formula:
Wherein P0 is the received power of mobile radio station on active user's link.
Wherein according to the minimum user link of following formula calculation cost functional value:
Said switch triggering method also comprises step:
When said target access station does not allow said mobile radio station to insert; Send the handoff failure notice to said handover trigger module, and said handover trigger module is upgraded the said corresponding handoff failure number of times
that switches
If
is less than the higher limit of the handoff failure number of times of concrete network regulation; Then execution in step (2), (3); And when said target access station allowed said mobile radio station to insert, the notice upper layer entity was carried out corresponding the access and is handled;
If
is more than or equal to the higher limit of the handoff failure number of times of concrete network regulation, then said finishing switching.
According to another aspect of the present invention, a kind of handover decisions method that is used for the central controlled two-hop cellular junction network in base station is provided, has comprised step:
(1) to different concrete application scenarioss, one or more in the mobility of comprehensive moving station measuring result, switching type, handoff failure information, mobile radio station and the present type of service make up corresponding cost function;
(2), and calculate the cost function value of active user's link according to the minimum cost functional value of each alternative user link of cost function calculation of said structure;
(3) at the minimum cost functional value of said alternative user link during less than the cost function value of said active user's link, the corresponding target access station of user link that request switches to mobile radio station and cost function value is minimum;
(4) to different concrete application scenarioss, one or more in active user's link-quality, switching type, current business state and the type of service and the user type of comprehensive to be switched mobile radio station make up the corresponding priority level function;
(5), calculate the priority of each to be switched mobile radio station according to the pri function of said structure;
(6) according to priority order from high to low, switch decision module is treated handover of mobile stations and is carried out handover operation one by one.
Wherein in step (4), whether there is the business datum of transmitting to confirm the current business state of said mobile radio station through detecting mobile radio station.
Wherein in step (4), Virtual network operator is confirmed said user type through the different stage of definition different user.
Wherein make up pri function according to following formula:
Wherein
Be the Signal to Interference plus Noise Ratio of to be switched mobile radio station active user link, G
MSnFor the obtainable resource of corresponding switching type institute discharges gain,
Wherein, ρ, η and σ are weight factors,
In the present invention, described two-hop cellular relay system is made up of a plurality of cellular cells, comprises a base station BS in each sub-district, one or more relay station RS and one or more mobile subscriber terminal MS.MS both can directly pass through the BS access network, also can set up and being connected with access network of BS through RS.
The central controlled two-hop cellular network of wherein said BS is meant that processing and the decision-making to handoff request must be carried out in this network in BS.
Wherein said target access station is the access station of in handoff procedure, being selected from alternative access station by switch triggering method as switching target.Here, direct-connected equipment when access station is meant the MS access network, access station can be BS or RS; Alternative access station is meant the access station that MS possibly switch to, and alternative access station can be the BS or the RS of this sub-district BS or RS or neighbor cell.
The present invention is directed to the characteristics of two-hop cellular junction network; A kind of switch triggering method that adapts with it and handover decisions method have been proposed; The time-delay and the signaling consumption thereof that switch have not only been reduced; Reduced handoff request rate and handover failure rate, guaranteed the telecommunication service quality of user under mobile environment, also made finite wireless resources obtain effective utilization.Simultaneously get increasing substantially of systematic function in return with few feedback information, performance cost has stronger practicality than high.
Description of drawings
With reference to the accompanying drawings and combine embodiment to further describe the present invention.Wherein
Fig. 1 shows and realizes changing method flow chart of the present invention, comprises switch triggering method flow chart and handover decisions method flow diagram;
Fig. 2 shows seven kinds of switching type sketch mapes that the present invention relates to;
The two-dimentional signaling consumption matrix S that Fig. 3 shows among the present invention to be provided;
The two-dimentional resource release matrix G that Fig. 4 shows among the present invention to be provided;
Fig. 5 to Figure 11 shows the corresponding signaling process of seven kinds of switching types of initiating switching by the BS centralized control and by BS for verifying that performance of the present invention provides;
Figure 12 and Figure 13 for the signaling consumption matrix S that calculates to the switching flow shown in Figure 11 at Fig. 5 ' with resource release matrix G '.
When Figure 14 showed number of users and gradually changes, the performance change curve of wait time delay was on average switched in system.
When Figure 15 shows number of users and gradually changes, the performance change curve of system signaling Capacity Ratio.
Embodiment
Below in conjunction with Fig. 1 to Fig. 4 changing method of the present invention is described.
At first; All should safeguard alternative access station set
alternative access station
k=1 of this MS at the BS of MS and its affiliated subdistrict; 2; K, K are the alternative access station number of this MS.This access station can be the BS or the RS of this sub-district BS or RS or neighbor cell.
Secondly, this changing method comprises switch triggering method module and handover decisions method module, and wherein the former both can be positioned at the MS side and also can be positioned at network side, by heterogeneous networks and equipment decision.The latter is positioned at network side.
Once more, should supply the handover trigger module to use according to signaling consumption matrix S of hand off signaling expense configuration of current network, also will discharge gain matrix G simultaneously and supply switch decision module to use according to resource of two-hop cellular relay network topology configuration at the BS end.Here, the type number that defines this sub-district BS, this sub-district RS, neighbor cell BS, neighbor cell RS is respectively 0,1,2,3.The element s of signaling consumption matrix S then
Ij(i=0,1; J=0,1,2,3; I, j ≠ 0) and resource discharge the element g of gain matrix G
Ij(i=0,1,2,3; J=0,1; I, j ≠ 0) represent from type number to be signaling consumption and the resource release gain of access station when type number is the access station switching of j of i respectively.The calculating of signaling consumption is by concrete network and equipment decision; Handle and when configuration hand off signaling expense matrix, need do normalization; That is:
resource discharges and discharges the system performance gain that Radio Resource brought after gain table is shown in the MS switching, and it specifically quantizes account form by real network and equipment decision
At last, MS can measure the quality of alternative user link, obtains the parameters such as received power on the alternative user link of each bar.The time interval of measuring is determined by concrete network.
After the each measurement of MS end is accomplished, give the handover trigger module that is positioned at MS side or network side with measurement report, this module will be carried out following steps:
The first step, handover trigger module obtain type number and the type number of current access station and the measurement result of relative users link thereof of alternative access station.At first according to current access station type number i and target access station type number j, from two-dimentional signaling consumption matrix, find foundation from this MS to r
kThe corresponding required hand off signaling expense S of switching type of alternative user link l
l=s
IjThen, from the measurement result of each alternative user link, obtain its received power P
lPresent speed v with to be switched MS
MSHere, make up a cost function according to above parameter and by the weight factor that type of service determines:
Wherein, μ, λ and ω are weight factor, and μ, and ω all can be according to the type of service adaptive configuration of current to be switched MS, with the demands of different of reflection different service types to handover delay.
V
MSBe the speed modifying factor, the numerical value of this factor is by concrete equipment and network based v
MSSet.
is for attempting switching to the frequency of failure of the pairing target access station of alternative user link l.
In second step,, calculate the cost function of active user's link with formula (2) with the cost function of each alternative user link of (1) formula calculating:
The 3rd step is from the cost function value f of second all alternative user link of calculating of step
lIn select minimum value and pairing link thereof, promptly
If
Then the handover trigger module will notify its upper layer entity to initiate handoff request, require to switch to link l
MinPairing target access station, and report that this MS is at link l
MinOn the SINR value.Otherwise, keep original subscriber's link.Wherein, hysteresis threshold
w
IntraAnd w
InterCan dispose voluntarily according to real network.
The 4th step; If the handover trigger module is received the handoff failure notice; Then upgrade the corresponding handoff failure number of times
of this switching if
less than the higher limit of the handoff failure number of times of concrete network regulation, then forwarded for second step to.If
is more than or equal to the higher limit of the handoff failure number of times of concrete network regulation; Finishing switching this time then, handover trigger module notice upper layer entity is handled accordingly.
When handoff request arrives switch decision module, carry out following steps:
The first step, at first, switch decision module is obtained the SINR value of to be switched MS active user link from handoff request
(dB), service condition and type of service and user type, wherein MS
nBe certain to be switched MS.Then, according to MS
nCurrent access station type number i and target access station type number j find the obtainable resource of corresponding switching type institute and discharge gain from two-dimentional resource release gain matrix
Make up a pri function according to above parameter and by the weight factor that type of service determines:
Wherein, ρ, η and σ are weight factors.
is the business-level parameter; It embodies corresponding professional requirement to real-time; This parameter value is by concrete network and equipment decision; Its value is more little, and expression is corresponding professional high more to the real-time requirement.
is the user gradation parameter; It embodies the grade of respective user; This parameter value is by concrete network and equipment decision; Its value is more little, and the grade of expression respective user is high more, should preferentially guarantee its service quality more.
Second step is with the pri function value of each to be switched MS of (5) formula calculating.
The 3rd step; The pri function value that second step was calculated sorts;
value is more little; Then priority is high more, according to priority order from high to low to be switched MS is carried out handover operation one by one then.
Verify the superiority of changing method of the present invention below according to a concrete switching embodiment.
Fig. 5 to Figure 11 shows the corresponding signaling process of seven kinds of switching types of initiating switching by the BS centralized control and by BS for verifying that performance of the present invention provides.Signaling wherein and message are explained as follows:
MS_MSR-REP is the signaling that comprises the MS measurement report.When BSHO-REQ is BS according to switch triggering method decision is initiated to switch, notice MS or notify MS and the current RS that inserts thereof to carry out the signaling of hand-off process.HO_INFO-IND is for when the switching target access station is RS, and the BS of this RS affiliated subdistrict notifies the corresponding preparation that this RS inserts to be switched MS and the signaling of processing.HO_INFO-ACK is that RS completes successfully after the corresponding preparation and processing that inserts to be switched MS the signaling of replying its affiliated BS.HOinformation request and HO information response.
For when the target access station is positioned at neighbor cell, handoff request and the response message between this sub-district BS and neighbor cell BS, transmitted, they will transmit through the interface between the defined BS of concrete network.
According to the embodiment of Fig. 5 to the corresponding signaling process of seven kinds of switching types shown in Figure 11; And suppose to be signaling consumption unit with signaling bar number in the present embodiment; Signaling consumption matrix S in the time of can obtaining adopting current embodiment with reference to the general signaling consumption computational methods described in the present invention ', shown in figure 12.In addition, discharge gain with the difference of switching the employed chain travel permit of back access network number as resource before supposing in the present embodiment to switch, can calculate the resource release matrix G ' when adopting current embodiment with MS, shown in figure 13.
Figure 12 and signaling consumption matrix S shown in Figure 13 ' with the condition of resource release matrix G ' under; Like Figure 14 and shown in Figure 15, we do not consider the influence of user velocity, service condition and type of service and user type in the emulation here than (SCR) for average handover delay and signaling capacity that emulation obtains system.
Figure 14 show Figure 12 and Figure 13 show respectively the signaling consumption matrix S ' with resource release matrix G ' condition under; And the descending maximum transmission power of BS is 1w; When the descending maximum transmission power of RS is 0.2w, according to switch triggering method of the present invention and handover decisions method, with system load; Be number of users when gradually changing, the performance change curve of wait time delay is on average switched in system.
Figure 15 show Figure 12 and Figure 13 show respectively the signaling consumption matrix S ' with resource release matrix G ' condition under; And the descending maximum transmission power of BS is 1w; When the descending maximum transmission power of RS is 0.2w, according to switch triggering method of the present invention and handover decisions method, with system load; Be number of users when gradually changing, the performance change curve of system signaling Capacity Ratio.
Figure 14 has shown the performance curve of the average handover delay of system along with system load.Here average handover delay is defined as all users of system from initiating for the first time handoff request constantly until its handover success delay statistics mean value constantly.By Tu Kede, the strategy of considering handover delay is superior to not considering the strategy of handover delay, and promptly ω=1 an o'clock handover delay is less than ω=0 o'clock; Because, for a MS, when switching target is RS; If RS does not have available resources; This MS will select other switching targets BS or RS, reduce average handover delay, also play the effect of load balance simultaneously.When considering signaling consumption simultaneously, MS tends to switch on the BS, can arrange resource owing to BS can arrange resource greater than RS, thereby has reduced to switch unaccepted chance, finally reduces handover delay.
For the performance of algorithm among overall merit the present invention, the definition signaling capacity is signaling consumption and channel capacity ratio than (SCR), promptly
SCR is more little, shows that this method can exchange bigger power system capacity through less signaling consumption for, and then systematic function is good more.As can be seen from Figure 15, the system SCR that considers the signaling consumption strategy is not than considering the little of signaling consumption strategy, and promptly μ=1 an o'clock SCR is better than μ=0 o'clock.
It is to be noted; Though emulation is to the specific hand off signaling flow process of a cover; But because algorithm, cost function and pri function that the inventive method adopts itself have certain generality; Therefore, when in the network that is applied to adopt different hand off signaling flow processs, the inventive method still can embody superiority.
Comprehensive legend is visible; Changing method of the present invention has not only reduced the time-delay and the signaling consumption thereof that switch; Reduced handoff request rate and handover failure rate, guaranteed the telecommunication service quality of user under mobile environment, also made finite wireless resources obtain effective utilization.Simultaneously get increasing substantially of systematic function in return with few feedback information, performance cost has stronger practicality than high.
Although the present invention has been described with reference to preferred embodiment and verified superiority of the present invention, those skilled in the art be through can making various modifications and replacement to the present invention with reference to specification embodiment and accompanying drawing, and can not deviate from the spirit and scope of the present invention.Therefore these modifications and replacement all should fall within protection scope of the present invention.
Claims (29)
1. a switch triggering method that is used for the central controlled two-hop cellular junction network in base station is characterized in that, said method comprises step:
(1) to different concrete application scenarioss, the mobility and the present type of service of comprehensive moving station measuring result, switching type, handoff failure information, mobile radio station make up corresponding cost function;
(2), and calculate the cost function value of active user's link according to the minimum cost functional value of each alternative user link of cost function calculation of said structure;
(3) at the minimum cost functional value of said alternative user link during less than the cost function value of said active user's link, the corresponding target access station of user link that request switches to mobile radio station and cost function value is minimum.
2. switch triggering method according to claim 1 is characterized in that, in step (2), through calculating the cost function value of the user link between mobile radio station and the access station, obtains the minimum cost functional value of each alternative user link, and
Through calculating the cost function value of the user link between mobile radio station and the alternative access station, obtain the cost function value of active user's link.
3. switch triggering method according to claim 2 is characterized in that, said access station is base station or relay station, and said alternative access station and said target access station are base station and relay station in this sub-district, or the base station of neighbor cell and relay station.
4. switch triggering method according to claim 1 is characterized in that, in step (1), through measuring link-quality between each access station in mobile radio station and the alternative access station, obtains said moving station measuring result.
5. switch triggering method according to claim 1 is characterized in that, said switching type comprises:
Switching, switching from relay station to base station and the switching from relay station to relay station of mobile radio station from the base station to the relay station in the sub-district, switching, switching from this cell base station to neighbor cell relay station, switching from this sub-district relay station to neighbor cell base station, the switching from this sub-district relay station to neighbor cell relay station of mobile radio station between neighbor cell from this cell base station to neighbor cell base station.
6. switch triggering method according to claim 1 is characterized in that, in step (1), through measuring the translational speed of mobile radio station, obtains the mobility of said mobile radio station.
7. switch triggering method according to claim 1 is characterized in that, said type of service is the type of service of in concrete network, stipulating.
8. switch triggering method according to claim 1 is characterized in that, also comprises step:
When said target access station does not allow said mobile radio station to insert, send the handoff failure notice to the handover trigger module, and said handover trigger module is upgraded and the corresponding handoff failure information of said switching;
Based on the handoff failure information after the said renewal, execution in step (2), (3), and when said target access station allowed said mobile radio station to insert, the notice upper layer entity was carried out corresponding the processing.
9. switch triggering method according to claim 8 is characterized in that, said handover trigger module is positioned at mobile radio station side or network side.
10. switch triggering method according to claim 1 is characterized in that, calculates the cost function of each alternative user link according to following formula:
Wherein, S
lFor setting up from said mobile radio station to alternative access station r
kThe corresponding required hand off signaling expense of switching type of alternative user link l, P
lBe the received power that from the measurement result of each alternative user link, obtains,
μ, λ and ω are weight factor, and μ, and ω all can be according to the type of service adaptive configuration of current to be switched mobile radio station,
V
MSBe the speed modifying factor, the numerical value of said speed modifying factor is by concrete equipment and network based v
MSSet v
MSPresent speed for to be switched mobile radio station MS;
11. switch triggering method according to claim 10 is characterized in that, calculates the cost function of active user's link according to following formula:
P wherein
0Be the received power of mobile radio station on active user's link.
12. switch triggering method according to claim 11, wherein according to the minimum user link of following formula calculation cost functional value:
13. switch triggering method according to claim 1 is characterized in that, also comprises step:
When said target access station does not allow said mobile radio station to insert; Send the handoff failure notice to the handover trigger module, and said handover trigger module is upgraded the said corresponding handoff failure number of times
that switches
If
is less than the higher limit of the handoff failure number of times of concrete network regulation; Then execution in step (2), (3); And when said target access station allowed said mobile radio station to insert, the notice upper layer entity was carried out corresponding the access and is handled;
If
is more than or equal to the higher limit of the handoff failure number of times of concrete network regulation, then said finishing switching.
14. a handover decisions method that is used for the central controlled two-hop cellular junction network in base station is characterized in that said method comprises step:
(1) to different concrete application scenarioss, the mobility and the present type of service of comprehensive moving station measuring result, switching type, handoff failure information, mobile radio station make up corresponding cost function;
(2), and calculate the cost function value of active user's link according to the minimum cost functional value of each alternative user link of cost function calculation of said structure;
(3) at the minimum cost functional value of said alternative user link during less than the cost function value of said active user's link, the corresponding target access station of user link that request switches to mobile radio station and cost function value is minimum;
(4) to different concrete application scenarioss, one or more in active user's link-quality, switching type, current business state and the type of service and the user type of comprehensive to be switched mobile radio station make up the corresponding priority level function;
(5), calculate the priority of each to be switched mobile radio station according to the pri function of said structure;
(6) according to priority order from high to low, switch decision module is treated handover of mobile stations and is carried out handover operation one by one.
15. whether handover decisions method according to claim 14 is characterized in that, in step (4), have the business datum of transmitting to confirm the current business state of said mobile radio station through detecting mobile radio station.
16. handover decisions method according to claim 14 is characterized in that, in step (4), Virtual network operator is confirmed said user type through the different stage of definition different user.
17. handover decisions method according to claim 14 is characterized in that, in step (2), through calculating the cost function value of the user link between mobile radio station and the access station, obtains the minimum cost functional value of each alternative user link, and
Through calculating the cost function value of the user link between mobile radio station and the alternative access station, obtain the cost function value of active user's link.
18. handover decisions method according to claim 17; It is characterized in that; Said access station is base station or relay station, and said alternative access station and said target access station are base station and relay station in this sub-district, or the base station of neighbor cell and relay station.
19. handover decisions method according to claim 14 is characterized in that, in step (1), through measuring link-quality between each access station in mobile radio station and the alternative access station, obtains said moving station measuring result.
20. handover decisions method according to claim 14 is characterized in that, said switching type comprises:
Switching, switching from relay station to base station and the switching from relay station to relay station of mobile radio station from the base station to the relay station in the sub-district, switching, switching from this cell base station to neighbor cell relay station, switching from this sub-district relay station to neighbor cell base station, the switching from this sub-district relay station to neighbor cell relay station of mobile radio station between neighbor cell from this cell base station to neighbor cell base station.
21. handover decisions method according to claim 14 is characterized in that, in step (1), through measuring the translational speed of mobile radio station, obtains the mobility of said mobile radio station.
22. handover decisions method according to claim 14 is characterized in that, said type of service is the type of service of in concrete network, stipulating.
23. handover decisions method according to claim 14 is characterized in that, also comprises step:
When said target access station does not allow said mobile radio station to insert, send the handoff failure notice to the handover trigger module, and said handover trigger module is upgraded and the corresponding handoff failure information of said switching;
Based on the handoff failure information after the said renewal, execution in step (2), (3), when said target access station allowed said mobile radio station to insert, the notice upper layer entity was carried out corresponding the processing.
24. handover decisions method according to claim 23 is characterized in that, said handover trigger module is positioned at mobile radio station side or network side.
25. handover decisions method according to claim 14 is characterized in that, calculates the cost function of each alternative user link according to following formula:
Wherein, S
lFor setting up from said mobile radio station to alternative access station r
kThe corresponding required hand off signaling expense of switching type of alternative user link l, P
lBe the received power that from the measurement result of each alternative user link, obtains,
μ, λ and ω are weight factor, and μ, and ω all can be according to the type of service adaptive configuration of current to be switched mobile radio station,
V
MSBe the speed modifying factor, the numerical value of said speed modifying factor is by concrete equipment and network based v
MSSet v
MSPresent speed for to be switched mobile radio station MS;
For attempting switching to the frequency of failure of the pairing target access station of alternative user link l.
26. handover decisions method according to claim 25 is characterized in that, calculates the cost function of active user's link according to following formula:
P wherein
0Be the received power on the mobile radio station active user link.
27. handover decisions method according to claim 26 is characterized in that, according to the minimum user link of following formula calculation cost functional value:
28. handover decisions method according to claim 14 is characterized in that, also comprises step:
When said target access station does not allow said mobile radio station to insert; Send the handoff failure notice to the handover trigger module, and said handover trigger module is upgraded the said corresponding handoff failure number of times
that switches
If
is less than the higher limit of the handoff failure number of times of concrete network regulation; Then execution in step (2), (3); And when said target access station allowed said mobile radio station to insert, the notice upper layer entity was carried out corresponding the access and is handled;
If
is more than or equal to the higher limit of the handoff failure number of times of concrete network regulation, then said finishing switching.
29. handover decisions method according to claim 14 is characterized in that, makes up pri function according to following formula:
SIR wherein
MSnBe the Signal to Interference plus Noise Ratio of to be switched mobile radio station active user link, G
MSnFor the obtainable resource of corresponding switching type institute discharges gain,
Wherein, ρ, η and σ are weight factors,
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| CN101883386B (en) * | 2009-05-04 | 2014-01-29 | ***通信集团公司 | Relay forwarding method, device and system of ranked data |
| CN102196521A (en) * | 2011-06-22 | 2011-09-21 | 北京邮电大学 | Switching method for orthogonal frequency division multiplexing (OFDM) cellular relay network |
| CN104507114B (en) * | 2014-11-25 | 2017-12-05 | 大唐移动通信设备有限公司 | A kind of parameter of TD LTE systems pulls together method and device |
| CN106470493B (en) * | 2015-08-21 | 2020-09-04 | 江苏慧丰信息科技有限公司 | Processing method of relay node, base station and relay node |
| CN105744549B (en) * | 2016-02-03 | 2019-06-11 | 宇龙计算机通信科技(深圳)有限公司 | A kind of switching method of transmission path, terminal and system |
| CN106686644A (en) * | 2017-01-11 | 2017-05-17 | 姜月娟 | Method and system for calculating moving speed of terminal |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1589053A (en) * | 2004-07-23 | 2005-03-02 | 北京邮电大学 | Relay selecting and power distribution method for double bounce honeycomb system |
| CN1595913A (en) * | 2003-09-10 | 2005-03-16 | 株式会社Ntt都科摩 | Communication protocol terminating method, control signal terminating server, and mobile communication system |
| CN1708166A (en) * | 2004-06-07 | 2005-12-14 | 华为技术有限公司 | Blind hand off method from wideband code division multiple access system to worldwide mobile communication system |
-
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1595913A (en) * | 2003-09-10 | 2005-03-16 | 株式会社Ntt都科摩 | Communication protocol terminating method, control signal terminating server, and mobile communication system |
| CN1708166A (en) * | 2004-06-07 | 2005-12-14 | 华为技术有限公司 | Blind hand off method from wideband code division multiple access system to worldwide mobile communication system |
| CN1589053A (en) * | 2004-07-23 | 2005-03-02 | 北京邮电大学 | Relay selecting and power distribution method for double bounce honeycomb system |
Non-Patent Citations (1)
| Title |
|---|
| 张静美.基于不同信道状态信息的两跳中继***最优功率分配.《北京邮电大学学报》.2005,第28卷(第4期), * |
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