CN105491636A - Cell switching method and device - Google Patents
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- CN105491636A CN105491636A CN201410484316.2A CN201410484316A CN105491636A CN 105491636 A CN105491636 A CN 105491636A CN 201410484316 A CN201410484316 A CN 201410484316A CN 105491636 A CN105491636 A CN 105491636A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
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Abstract
The invention discloses a cell switching method and device. The cell switching method comprises the following steps: acquiring a movement speed of a terminal; and selecting a switching target cell from candidate switching cells according to the movement speed of the terminal, and switching the terminal to the switching target cell. According to the cell switching method provided by the invention, a movement speed factor of the terminal is considered, and a proper switching target cell is determined according to the movement speed, so that the problem of frequent switching of the terminal due to miss of consideration of the movement speed of the terminal in existing cell switching is solved; the switching effect is optimized; and the user experience is improved.
Description
Technical field
The present invention relates to wireless communication technology field, refer more particularly to a kind of cell switching method and device.
Background technology
Current, along with the development of radio communication, particularly 4G technology and the extensive of following 5G technology are popularized, wireless cellular cell distribution presents multimode situation, GSM, UMTS, LTE, TDSCDMA, standard that CDMA etc. are wireless is also deposited, and this makes the distribution of community present macrocell, Microcell, millimicro community, the vertical distribution structure of picocell; Meanwhile, the distribution of WLAN (wireless local area network) WLAN is also more and more extensive, and exists increasing mutual with the community of multi-mode wireless standard, and moves towards gradually to merge.Merge heterogeneous network framework under, between the different systems of multimode, and and WLAN between often need to switch.
Current switching just considers business that source channel, the level of destination channel or signal to noise ratio, quality and terminal itself do to the requirement of carrying, mainly comprise required time delay and bit error rate requirement etc., these show increasing problem under heterogeneous network, such as:
When the translational speed of terminal is than time very fast, terminal may be switched to Microcell from Microcell, constantly switches between Microcell, causes and switches frequently, adds the hand off signaling load of macroreticular, causes interruption or the time delay of customer service, reduces the impression of user.Terminal also may be directly switch to Microcell from WLAN, causes frequent switching.
Summary of the invention
The main technical problem to be solved in the present invention is, provides a kind of cell switching method and device, can solve in current cell merge the technical problem that there is terminal and frequently switch.
For solving the problems of the technologies described above, the invention provides a kind of cell switching method, comprising the steps:
Obtain the translational speed of terminal;
Translational speed according to described terminal chooses switching target small area from candidate handover cell, by described terminal switch to described switching target small area.
Further, when described terminal current business is to load bearing requirements height, described candidate handover cell comprises: in the adjacent cell of cell-of-origin, load meets pre-conditioned community, and described load comprises Radio Resource load and/or passback load;
When described terminal current business is low to load bearing requirements, described candidate cell comprises: the adjacent cell of cell-of-origin.
Further, the step that the described translational speed according to described terminal chooses switching target small area from candidate handover cell comprises:
Determine the translational speed rank of described terminal;
Determine the cell type corresponding with described translational speed rank;
According to the cell type determined, from described candidate handover cell, choose described switching target small area.
Further, the described cell type according to determining, the step choosing described switching target small area from described candidate handover cell comprises:
Choose in described candidate handover cell and conform to the described cell type determined, and at least one item in the quality of reception, incoming level, signal to noise ratio meets the community of predetermined condition as switching target small area.
Further, described translational speed rank comprises: at a high speed, middling speed and low speed;
Describedly determine that the step of the cell type corresponding with described translational speed rank comprises:
When described translational speed rank is high speed, determine that with cell type corresponding be at a high speed macrocell;
When described translational speed rank is middling speed, determine that the cell type corresponding with middling speed is Microcell;
When described translational speed rank is low speed, determine that the cell type corresponding with low speed is picocell.
Further, described method also comprises: when there is not the cell type corresponding with described translational speed rank in described candidate handover cell, from the cell type included by described candidate handover cell, a kind of cell type is chosen according to preset rules, according to the cell type that this is chosen, from described candidate handover cell, determine described switching target small area.
Further, when described translational speed rank is not at a high speed and when existing macrocell in described candidate handover cell, described preset rules comprises: first choose Microcell, if there is not Microcell in described candidate handover cell, then choose picocell again, if Zhong Bucun picocell, described candidate handover cell, then choosing cell type is again WLAN (wireless local area network) community;
When described translational speed rank is middling speed and there is not Microcell in described candidate handover cell, described preset rules comprises: first choose macrocell, if there is not macrocell in described candidate handover cell, then choose picocell again, if there is not picocell in described candidate handover cell, then choose WLAN (wireless local area network) community again;
When described translational speed rank is middling speed and there is not picocell in described candidate handover cell, described preset rules comprises: first choose WLAN (wireless local area network) community, if there is not WLAN (wireless local area network) community in described candidate handover cell, then choose Microcell again, if there is not Microcell in described candidate handover cell, then choose macrocell again.
Also for ease of and solve above-mentioned technical problem, present invention also offers a kind of cell merge device, comprising: speed acquiring module, community choose module and cell merge module;
Described speed acquiring module is for obtaining the translational speed of terminal;
Module is chosen for choosing switching target small area according to the translational speed of described terminal from candidate handover cell in described community;
Described cell merge module is used for described terminal switch to described switching target small area.
Further, when described terminal current business is to load bearing requirements height, described candidate handover cell comprises: in the adjacent cell of cell-of-origin, load meets pre-conditioned community, and described load comprises Radio Resource load and/or passback load; When described terminal current business is low to load bearing requirements, described candidate cell comprises: the adjacent cell of cell-of-origin.
Further, described community is chosen module and is comprised: module is chosen in rank determination module, determination type module and Target cell;
Described rank determination module is for determining the translational speed rank of described terminal;
Described determination type module is for determining the cell type corresponding with described translational speed rank;
Described Target cell determination module is used for the cell type determined according to described determination type module, from described candidate handover cell, choose described switching target small area.
Further, described Target cell is chosen module and is conformed to the described cell type determined for choosing in described candidate handover cell, and at least one item in the quality of reception, incoming level, signal to noise ratio meets the community of predetermined condition as switching target small area.
Further, described translational speed rank comprises: at a high speed, middling speed and low speed;
Described determination type module is used for:
When described translational speed rank is high speed, determine that with cell type corresponding be at a high speed macrocell;
When described translational speed rank is middling speed, determine that the cell type corresponding with middling speed is Microcell;
When described translational speed rank is low speed, determine that the cell type corresponding with low speed is picocell.
Further, described determination type module also for: when there is not the cell type corresponding with described translational speed rank in described candidate handover cell, from the cell type included by described candidate handover cell, choose a kind of cell type according to preset rules.
Further, when described translational speed rank is not at a high speed and when existing macrocell in described candidate handover cell, described preset rules comprises: first choose Microcell, if there is not Microcell in described candidate handover cell, then choose picocell again, if Zhong Bucun picocell, described candidate handover cell, then choosing cell type is again WLAN (wireless local area network) community;
When described translational speed rank is middling speed and there is not Microcell in described candidate handover cell, described preset rules comprises: first choose macrocell, if there is not macrocell in described candidate handover cell, then choose picocell again, if there is not picocell in described candidate handover cell, then choose WLAN (wireless local area network) community again;
When described translational speed rank is middling speed and there is not picocell in described candidate handover cell, described preset rules comprises: first choose WLAN (wireless local area network) community, if there is not WLAN (wireless local area network) community in described candidate handover cell, then choose Microcell again, if there is not Microcell in described candidate handover cell, then choose macrocell again.
The invention has the beneficial effects as follows:
The invention provides a kind of cell switching method and device, consider speed factor to realize the switching of community, make terminal infrequently switching cell; Particularly, cell switching method of the present invention comprises: the translational speed obtaining terminal; Translational speed according to described terminal chooses switching target small area from candidate handover cell, by described terminal switch to described switching target small area; Cell switching method provided by the invention considers the translational speed factor of terminal, suitable switching target small area is determined according to translational speed, avoid terminal that existing cell merge do not consider that the translational speed of terminal is brought frequently to switch problem, optimize the effect of switching, improve Consumer's Experience.
Further, in cell switching method of the present invention, when described terminal current business is to load bearing requirements height, described candidate cell comprises: in the adjacent cell of cell-of-origin, load meets pre-conditioned community, and described load comprises Radio Resource load and/or passback load; When described terminal current business is low to load bearing requirements, described candidate cell comprises: the adjacent cell of cell-of-origin; Visible minilocus approach of the present invention also further contemplates the load of adjacent cell and terminal traffic to these factors of load bearing requirements on the basis considering moving velocity of terminal, determine most suitable Target cell, avoid that the load of base station that existing cell merge do not consider that the load of adjacent cell and the translational speed of terminal bring is large, terminal traffic cannot realize, terminal frequently switches problem, reduce the load of communication system, further, optimize the effect of switching, improve Consumer's Experience.
Accompanying drawing explanation
The schematic flow sheet of a kind of cell switching method that Fig. 1 provides for the embodiment of the present invention one;
The schematic flow sheet of the another kind of cell switching method that Fig. 2 provides for the embodiment of the present invention one;
Choose the schematic flow sheet of switching target small area according to translational speed in a kind of cell switching method that Fig. 3 provides for the embodiment of the present invention one;
Choose the schematic flow sheet of switching target small area according to translational speed in the another kind of cell switching method that Fig. 4 provides for the embodiment of the present invention one;
The structural representation of a kind of cell merge device that Fig. 5 provides for the embodiment of the present invention two;
The structural representation of a kind of cell merge device that Fig. 6 provides for the embodiment of the present invention two.
Embodiment
By reference to the accompanying drawings the present invention is described in further detail below by embodiment.
Embodiment one:
Consider that current cell switching method does not consider the problem that the translational speed of terminal causes terminal frequently to switch; Present embodiments provide a kind of cell switching method, as shown in Figure 1, comprise the steps:
Step 101: the translational speed obtaining terminal.
The following two kinds mode can be adopted in the present embodiment method to obtain the translational speed of terminal:
The first, speed is measured by base station, and base station can utilize the technology such as MIMO, frequency deviation estimation to realize measuring.
The second, speed is measured by terminal, and terminal realizes the Measurement accuracy of speed by self sensor measuring element.Measurement report periodically reports base station, can directly in the measurement field that finally gathers way of measurement report message during concrete transmission.
Step 102: the translational speed according to described terminal chooses switching target small area from candidate handover cell, by described terminal switch to described switching target small area.
In the present embodiment, switching target small area is the adjacent cell that terminal finally needs to be switched to.
The present embodiment method considers the translational speed factor of terminal when at cell merge, suitable switching target small area is determined according to moving velocity of terminal, avoid terminal that existing cell merge do not consider that the translational speed of terminal is brought frequently to switch problem, optimize the effect of switching, improve Consumer's Experience.
The load further contemplating some base station usual in handoff procedure is very high, increases the pressure of scheduling; The business that other requires the fast time delay of speed low can because the time delay of return link be excessive or load is excessive, and cause business can not done, namely terminal traffic cannot realize.Particularly when cell merge:
If do not consider the load of eating dishes without rice or wine of base station, the load of base station can be caused very high, strengthen the pressure of scheduling.
If do not consider the passback load (return link load) of base station, reality can cause business need time delay low, even if the fast business of speed is switched to target BS, also can be excessive or load is excessive because of the time delay of return link, cause business can not done, namely terminal traffic cannot realize.
In order to overcome the problem that load of base station is large, traffic scheduling pressure is large, terminal cannot realize that above-mentioned factor causes; In the present embodiment method, following restriction is done to candidate handover cell:
When described terminal current business is to load bearing requirements height, described candidate cell comprises: in the adjacent cell of cell-of-origin, load meets pre-conditioned community, and described load comprises Radio Resource load and/or passback load;
When described terminal current business is low to load bearing requirements, described candidate cell comprises: the adjacent cell of cell-of-origin.
As can be seen from such scheme, first the present embodiment method cell switching method can consider the requirement of terminal traffic to carrying, require to adopt diverse ways to determine switching target small area for different business, when terminal current business is high to load bearing requirements, also need the load considering community, candidate handover cell is filtered out according to load, then the translational speed of terminal can be considered, the Target cell that suitable final needs are switched to is filtered out from candidate handover cell, i.e. switching target small area, is finally switched to this Target cell; When terminal current business is low to load bearing requirements, directly from adjacent cell, choose switching target small area according to translational speed; Visible the present embodiment method, compare existing cell switching method, consider more factor, the translational speed of the Radio Resource load of such as adjacent cell, return link load and terminal, thus solve existing cell switching method and reckon without the problem that factor here brings, the problem that such as load of base station is large, traffic scheduling pressure is large, terminal cannot realize and terminal frequently switches.
According to cell switching method described above, as shown in Figure 2, the cell switching method that the present embodiment provides, can specifically comprise the steps:
Step 201: judge that described terminal current business is the business still low to load bearing requirements to the business that load bearing requirements is high according to the requirement of terminal current business to carrying, if the business high to load bearing requirements goes to step 202, if the business low to load bearing requirements goes to step 203.
Terminal traffic according to the requirement of terminal current business to carrying, can be divided into two large classes, the business high to load bearing requirements and the business low to load bearing requirements by the present embodiment method; Particularly, the requirement of terminal traffic to carrying can comprise at least one in rate requirement needed for business, delay requirement, bit error rate requirement.
In the present embodiment method when terminal traffic to carrying require to include rate requirement and delay requirement time, terminal traffic can be divided into higher rate compared with the business of low time delay and the business compared with the higher time delay of low rate.
Step 202: choose load and meet alternatively switching cell, pre-conditioned community from the adjacent cell of cell-of-origin, described terminal place, described load comprises Radio Resource load and/or passback load, goes to step 204.
In the present embodiment, the load of adjacent cell comprises Radio Resource load and/or passback load; The load of eating dishes without rice or wine of base station in the adjacent cell that Radio Resource load refers to, passback load refers to the return link load of base station in adjacent cell.
The following two kinds mode can be adopted in the present embodiment method to obtain eat dishes without rice or wine load and the return link information on load of base station, adjacent cell, i.e. the Radio Resource passback information on load of adjacent cell:
The first, is by the interconnecting interface between base station, the X2 interface such as between LTE base station, share information on load, the time of periodically updating of this information can configure, simultaneously, core net needs the information on load knowing its base station managed, and this interface by core net and wireless access network obtains.
The second, information on load is offered core net by interface by base station, and this information is transmitted to base station by core net again.
Preferentially, step 202 is pre-conditioned can specifically comprise: from the adjacent cell of cell-of-origin, described terminal place, choose the alternatively switching cell, community that load is less than certain predetermined threshold value; Load such as when community comprises: during Radio Resource load, obtains the Radio Resource payload of each Ling Jin community, then chooses the alternatively switching cell, community that Radio Resource load is less than predetermined threshold value; Again such as, comprise when meeting of community: Radio Resource load and passback load; Obtain Radio Resource load and the passback load of each adjacent cell, then calculate the average load of each adjacent cell according to the Radio Resource load of each adjacent cell and passback load gauge, choose the alternatively switching cell, community that average load is less than predetermined threshold value.
Step 203: by direct for the adjacent cell of cell-of-origin, described terminal place alternatively switching cell, go to step 204.
Step 204: the translational speed according to described terminal chooses switching target small area from described candidate handover cell.
The present embodiment method is for the business high to load bearing requirements, the translational speed considering adjacent cell load and terminal determines optimum Target cell, avoid and do not consider Radio Resource load and/or the problem that the load of base station that causes of passback load is large and/or business cannot realize at cell merge, also avoid the problem not considering that the translational speed of terminal causes terminal frequently to switch.
The present embodiment method is for the business low to load bearing requirements, and can consider that the translational speed of terminal selects the final Target cell needing to switch from the adjacent cell of cell-of-origin, it can not consider the load of community, avoids terminal and frequently switches.
Step 205: described terminal is switched to described switching target small area from described cell-of-origin.
The cell switching method that the present embodiment provides has considered the load of adjacent cell, the translational speed of terminal and terminal traffic these factors of requirement to carrying, thus determine except most suitable Target cell, avoid that the load of base station that existing cell merge do not consider that the load of adjacent cell and the translational speed of terminal bring is large, terminal traffic cannot realize, terminal frequently switches problem, reduce the load of communication system, optimize the effect of switching, improve Consumer's Experience.
Lower mask body introduces the process choosing switching target small area in the present embodiment method according to the translational speed of described terminal from candidate handover cell:
As shown in Figure 3, in the present embodiment, above-mentioned steps 102 or step 204 can specifically comprise:
Step 301: the translational speed rank determining described terminal.
Preferentially, in the present embodiment, the translational speed rank of terminal can be divided into three ranks, at a high speed, middling speed, low speed; Concrete dividing mode can divide according to two threshold speeds preset.Such as arranging two speed thresholds respectively, is Vhigh and Vlow, when the actual translational speed of terminal, is at a high speed during V>Vhigh; Be low speed during V<Vlow; It is middling speed between therebetween time.
In the present embodiment the translational speed rank of terminal not only for three ranks, can also be divided into the rank of more than two or three, other quantity of concrete partition level can be determined according to the environment of cell merge or actual demand.
Step 302: determine the cell type corresponding with described translational speed rank.
The present embodiment method after determining translational speed rank, also can need to determine the cell type with speed step, thus chooses switching target small area.
Preferably, when described translational speed rank comprises: at a high speed, middling speed and low speed when; When described translational speed rank is high speed, determine that with cell type corresponding be at a high speed macrocell; When described translational speed rank is middling speed, determine that the cell type corresponding with middling speed is Microcell; When described translational speed rank is low speed, determine that the cell type corresponding with low speed is picocell.
Step 303: according to the cell type determined, chooses described switching target small area from described candidate handover cell.
Step 303 can specifically comprise: choose the community that conforms to the described cell type determined in described candidate handover cell as switching target small area.
In order to choose most suitable Target cell further, promoting cell merge effect, it is also conceivable at least one in the community quality of reception, incoming level and signal to noise ratio when selecting switching target small area; Therefore, above-mentioned steps 303 can also comprise: choose in described candidate handover cell and conform to the described cell type determined, and at least one item in the quality of reception, incoming level, signal to noise ratio meets the community of predetermined condition as switching target small area.
In the present embodiment, predetermined condition can be that at least one item in the quality of reception, incoming level, signal to noise ratio is higher than certain threshold value.
Consider in above-mentioned cell switching method the situation that may exist in candidate handover cell and there is not the cell type corresponding with described translational speed rank, cause the problem that the present embodiment cell switching method is poor for applicability;
The cell switching method that the present embodiment provides can also be worked as in described candidate handover cell when there is not the cell type corresponding with described translational speed rank, from the cell type included by described candidate handover cell, a kind of cell type is chosen according to preset rules, according to the cell type that this is chosen, from described candidate handover cell, determine described switching target small area.Particularly:
When there is not macrocell when the translational speed rank of described terminal is high speed and in described candidate handover cell, when the translational speed that described terminal is current is middling speed and there is not Microcell in described candidate handover cell, and when the current translational speed of described terminal is not for low speed and when existing picocell in described candidate handover cell: from the cell type included by described candidate handover cell, choose a kind of cell type according to preset rules, according to the cell type that this is chosen, from described candidate handover cell, determine described switching target small area.
When there is not the cell type corresponding with described translational speed rank in lower mask body introduction in candidate handover cell, the processing procedure that the present embodiment method is concrete:
1, when the translational speed rank of described terminal is not at a high speed and when existing macrocell in described candidate handover cell, described preset rules comprises: first choose Microcell, if there is not Microcell in described candidate handover cell, then choose picocell again, if Zhong Bucun picocell, described candidate handover cell, then choosing cell type is again WLAN (wireless local area network) community.
Therefore, in the present embodiment method when the translational speed rank of terminal is high speed, small area, preferred candidate switching cell type is macrocell, and the community that at least one item in the quality of reception, incoming level and signal to noise ratio conforms to a predetermined condition is as switching target small area; If there is not macrocell in candidate handover cell, then choosing small area, candidate handover cell type is Microcell, and the community that at least one item in the quality of reception, incoming level and signal to noise ratio conforms to a predetermined condition is as switching target small area; If there is not Microcell in candidate handover cell, then choosing small area, candidate handover cell type is picocell, and the community that conforms to a predetermined condition of at least one item in the quality of reception, incoming level and signal to noise ratio as the community of switching target small area as switching target small area; If there is not picocell in candidate handover cell, then choosing small area, candidate handover cell type is WLAN (wireless local area network) community, and the community that conforms to a predetermined condition of at least one item in the quality of reception, incoming level and signal to noise ratio as the community of switching target small area as switching target small area.
2, when described translational speed rank is middling speed and there is not Microcell in described candidate handover cell, described preset rules comprises: first choose macrocell, if there is not macrocell in described candidate handover cell, then choose picocell again, if there is not picocell in described candidate handover cell, then choose WLAN (wireless local area network) community again.
Therefore, in the present embodiment method when the translational speed rank of terminal is middling speed, small area, preferred candidate switching cell type is Microcell, and the community that at least one item in the quality of reception, incoming level and signal to noise ratio conforms to a predetermined condition is as switching target small area; If there is not Microcell in candidate handover cell, then choosing small area, candidate handover cell type is macrocell, and the community that at least one item in the quality of reception, incoming level and signal to noise ratio conforms to a predetermined condition is as switching target small area; If there is not macrocell in candidate handover cell, then choosing small area, candidate handover cell type is picocell, and the community that conforms to a predetermined condition of at least one item in the quality of reception, incoming level and signal to noise ratio as the community of switching target small area as switching target small area; If there is not picocell in candidate handover cell, then choosing small area, candidate handover cell type is WLAN (wireless local area network) community, and the community that conforms to a predetermined condition of at least one item in the quality of reception, incoming level and signal to noise ratio as the community of switching target small area as switching target small area.
3, when described translational speed rank is middling speed and there is not picocell in described candidate handover cell, described preset rules comprises: first choose WLAN (wireless local area network) community, if there is not WLAN (wireless local area network) community in described candidate handover cell, then choose Microcell again, if there is not Microcell in described candidate handover cell, then choose macrocell again.
Therefore, in the present embodiment method when the translational speed rank of terminal is middling speed, small area, preferred candidate switching cell type is picocell, and the community that at least one item in the quality of reception, incoming level and signal to noise ratio conforms to a predetermined condition is as switching target small area; If there is not picocell in candidate handover cell, then choosing small area, candidate handover cell type is WLAN (wireless local area network) community, and the community that at least one item in the quality of reception, incoming level and signal to noise ratio conforms to a predetermined condition is as switching target small area; If there is not WLAN (wireless local area network) community in candidate handover cell, then choosing small area, candidate handover cell type is Microcell, and the community that conforms to a predetermined condition of at least one item in the quality of reception, incoming level and signal to noise ratio as the community of switching target small area as switching target small area; If there is not Microcell in candidate handover cell, then choosing small area, candidate handover cell type is macrocell, and the community that conforms to a predetermined condition of at least one item in the quality of reception, incoming level and signal to noise ratio as the community of switching target small area as switching target small area.
As shown in Figure 4, the concrete process choosing switching target small area in the present embodiment cell switching method according to the translational speed of terminal from candidate handover cell is specifically described:
Step 401: the translational speed obtaining described terminal.
The mode obtaining the current translational speed of terminal in this step can with reference to the mode of above-mentioned introduction.
Step 402: judge that the translational speed rank of described terminal is as high speed, middling speed or low speed, if go to step 403, if middling speed goes to step 408, if low speed rotation step 411 at a high speed.
Step 403: judge whether there is macrocell in candidate handover cell, if so, then go to step 415, if not, then go to step 404;
Step 404: judge whether there is Microcell in candidate handover cell, if so, then go to step 415, if not, then go to step 405;
Step 405: judge whether there is picocell in candidate handover cell, if so, then go to step 415, if not, then go to step 406;
Step 406: judge whether there is WLAN adjacent area in candidate handover cell, if so, then go to step 415;
Step 407: judge whether there is Microcell in candidate handover cell, if so, then go to step 415, if not, then go to step 408;
Step 408: judge whether there is macrocell in candidate handover cell, if so, then go to step 415, if not, then go to step 409;
Step 409: judge whether there is picocell in candidate handover cell, if so, then go to step 415, if not, then go to step 410;
Step 410: judge whether there is WLAN adjacent area in candidate handover cell, if so, then go to step;
Step 411: judge whether there is picocell in candidate handover cell, if so, then go to step 415, if not, then go to step 412;
Step 412: judge whether there is WLAN adjacent area in candidate handover cell, if so, then go to step 415, if not, then go to step 413;
Step 413: judge whether there is Microcell in candidate handover cell, if so, then go to step 415, if not, then go to step 414;
Step 414: judge whether there is macrocell in candidate handover cell, if so, then go to step 415;
Step 415: choose community that at least one item in the quality of reception of community, incoming level and the signal to noise ratio judging to exist conforms to a predetermined condition as switching target small area.
Describe above-mentioned the present embodiment changing method for a specific example in detail below:
1, cell-of-origin, terminal place is LTE, and the neighbor cell configuration of this community has 3 types: LTE macrocell, LTE Microcell, WLAN adjacent area.LTE macrocell A respectively, LTE macrocell B, LTE Microcell C, LTE Microcell D, WLAN adjacent area E.Terminal traffic is two-forty low time delay business (namely high to load bearing requirements business), with high-speed mobile when needing to switch.
2, A community is 0.6 without specific electric load, and passback load is 0.3; B community is 0.4 without specific electric load, and passback load is 0.5; C community is 0.8 without specific electric load, and passback load is 0.5; D community is 0.7 without specific electric load, and passback load is 0.8; E community is 0.6 without specific electric load, and passback load is 0.6.
3, calculated load FACTOR P A=0.45, PB=0.45; PC=0.65; PD=0.75; PE=0.6.
4, judge it is two-forty low time delay business according to type of service, provide to be switched native region priority list A according to load coefficient, B, E, C, D; Can choose preliminary to be switched community according to default load coefficient threshold scope, such as, when default load coefficient threshold is 0.6, choosing the community that load coefficient is less than 06 is preliminary to be switched community, obtains candidate handover cell list: A, B, E.
5, now, translational speed rank is that whether the list of query candidate switching cell exists macrocell, there is macrocell A, B in list at a high speed.
6, sort from big to small (B, A) according to level or signal to noise ratio, determine switching target small area and B.
7, during switch decision, the switching from cell-of-origin to Target cell B is performed.
Embodiment two:
As shown in Figure 5, present embodiments provide a kind of cell merge device, specifically comprise: speed acquiring module, community choose module and cell merge module;
Described speed acquiring module is for obtaining the translational speed of terminal;
Module is chosen for choosing switching target small area according to the translational speed of described terminal from candidate handover cell in described community;
Described cell merge module is used for described terminal switch to described switching target small area.
The cell merge device that the present embodiment provides considers the translational speed factor of terminal when cell merge, suitable switching target small area is determined according to moving velocity of terminal, avoid terminal that existing cell merge do not consider that the translational speed of terminal is brought frequently to switch problem, optimize the effect of switching, improve Consumer's Experience.
On the basis of said apparatus, a kind of improvement project of the present embodiment is: when described terminal current business is to load bearing requirements height, described candidate cell comprises: in the adjacent cell of cell-of-origin, load meets pre-conditioned community, and described load comprises Radio Resource load and/or passback load; When described terminal current business is low to load bearing requirements, described candidate cell comprises: the adjacent cell of cell-of-origin.
The present embodiment cell merge device not only considers that moving velocity of terminal also considers other factors more, the Radio Resource load of such as adjacent cell, return link load, most suitable switching target small area in finally choosing, thus solve existing cell switching method and reckon without the problem that factor here brings, the problem that such as load of base station is large, traffic scheduling pressure is large, terminal cannot realize and terminal frequently switches
Preferentially, as shown in Figure 6, on the basis of said apparatus, described community is chosen module and is comprised: module is chosen in rank determination module, determination type module and Target cell;
Described rank determination module is for determining the translational speed rank of described terminal;
Described determination type module is for determining the cell type corresponding with described translational speed rank;
Described Target cell determination module is used for the cell type determined according to described determination type module, from described candidate handover cell, choose described switching target small area.
Preferably, described Target cell is chosen module and is conformed to the described cell type determined for choosing in described candidate handover cell, and at least one item in the quality of reception, incoming level, signal to noise ratio meets the community of predetermined condition as switching target small area.
Preferably, described translational speed rank comprises: at a high speed, middling speed and low speed;
Described determination type module is used for:
When described translational speed rank is high speed, determine that with cell type corresponding be at a high speed macrocell;
When described translational speed rank is middling speed, determine that the cell type corresponding with middling speed is Microcell;
When described translational speed rank is low speed, determine that the cell type corresponding with low speed is picocell.
Preferably, described determination type module also for: when there is not the cell type corresponding with described translational speed rank in described candidate handover cell, from the cell type included by described candidate handover cell, choose a kind of cell type according to preset rules.
Preferably, when described translational speed rank is not at a high speed and when existing macrocell in described candidate handover cell, described preset rules comprises: first choose Microcell, if there is not Microcell in described candidate handover cell, then choose picocell again, if Zhong Bucun picocell, described candidate handover cell, then choosing cell type is again WLAN (wireless local area network) community;
When described translational speed rank is middling speed and there is not Microcell in described candidate handover cell, described preset rules comprises: first choose macrocell, if there is not macrocell in described candidate handover cell, then choose picocell again, if there is not picocell in described candidate handover cell, then choose WLAN (wireless local area network) community again;
When described translational speed rank is middling speed and there is not picocell in described candidate handover cell, described preset rules comprises: first choose WLAN (wireless local area network) community, if there is not WLAN (wireless local area network) community in described candidate handover cell, then choose Microcell again, if there is not Microcell in described candidate handover cell, then choose macrocell again.
The cell merge device of the present embodiment considers the load of adjacent cell, the translational speed of terminal and terminal traffic these factors of requirement to carrying, thus determine except most suitable Target cell, avoid that the load of base station that existing cell merge do not consider that the load of adjacent cell and the translational speed of terminal bring is large, terminal traffic cannot realize, terminal frequently switches problem, reduce the load of communication system, optimize the effect of switching, improve Consumer's Experience.
Above content is in conjunction with concrete execution mode further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (14)
1. a cell switching method, is characterized in that, comprises the steps:
Obtain the translational speed of terminal;
Translational speed according to described terminal chooses switching target small area from candidate handover cell, by described terminal switch to described switching target small area.
2. cell switching method as claimed in claim 1, is characterized in that:
When described terminal current business is to load bearing requirements height, described candidate handover cell comprises: in the adjacent cell of cell-of-origin, load meets pre-conditioned community, and described load comprises Radio Resource load and/or passback load;
When described terminal current business is low to load bearing requirements, described candidate cell comprises: the adjacent cell of cell-of-origin.
3. cell switching method as claimed in claim 1 or 2, it is characterized in that, the step that the described translational speed according to described terminal chooses switching target small area from candidate handover cell comprises:
Determine the translational speed rank of described terminal;
Determine the cell type corresponding with described translational speed rank;
According to the cell type determined, from described candidate handover cell, choose described switching target small area.
4. cell switching method as claimed in claim 3, it is characterized in that, the described cell type according to determining, the step choosing described switching target small area from described candidate handover cell comprises:
Choose in described candidate handover cell and conform to the described cell type determined, and at least one item in the quality of reception, incoming level, signal to noise ratio meets the community of predetermined condition as switching target small area.
5. cell switching method as claimed in claim 3, is characterized in that,
Described translational speed rank comprises: at a high speed, middling speed and low speed;
Describedly determine that the step of the cell type corresponding with described translational speed rank comprises:
When described translational speed rank is high speed, determine that with cell type corresponding be at a high speed macrocell;
When described translational speed rank is middling speed, determine that the cell type corresponding with middling speed is Microcell;
When described translational speed rank is low speed, determine that the cell type corresponding with low speed is picocell.
6. cell switching method as claimed in claim 3, it is characterized in that, also comprise: when there is not the cell type corresponding with described translational speed rank in described candidate handover cell, from the cell type included by described candidate handover cell, a kind of cell type is chosen according to preset rules, according to the cell type that this is chosen, from described candidate handover cell, determine described switching target small area.
7. cell switching method as claimed in claim 6, it is characterized in that, when described translational speed rank is not at a high speed and when existing macrocell in described candidate handover cell, described preset rules comprises: first choose Microcell, if there is not Microcell in described candidate handover cell, then choose picocell again, if Zhong Bucun picocell, described candidate handover cell, then choosing cell type is again WLAN (wireless local area network) community;
When described translational speed rank is middling speed and there is not Microcell in described candidate handover cell, described preset rules comprises: first choose macrocell, if there is not macrocell in described candidate handover cell, then choose picocell again, if there is not picocell in described candidate handover cell, then choose WLAN (wireless local area network) community again;
When described translational speed rank is middling speed and there is not picocell in described candidate handover cell, described preset rules comprises: first choose WLAN (wireless local area network) community, if there is not WLAN (wireless local area network) community in described candidate handover cell, then choose Microcell again, if there is not Microcell in described candidate handover cell, then choose macrocell again.
8. a cell merge device, is characterized in that, comprising: speed acquiring module, community choose module and cell merge module;
Described speed acquiring module is for obtaining the translational speed of terminal;
Module is chosen for choosing switching target small area according to the translational speed of described terminal from candidate handover cell in described community;
Described cell merge module is used for described terminal switch to described switching target small area.
9. cell merge device as claimed in claim 8, it is characterized in that, when described terminal current business is to load bearing requirements height, described candidate handover cell comprises: in the adjacent cell of cell-of-origin, load meets pre-conditioned community, and described load comprises Radio Resource load and/or passback load; When described terminal current business is low to load bearing requirements, described candidate cell comprises: the adjacent cell of cell-of-origin.
10. cell merge device as claimed in claim 8 or 9, it is characterized in that, described community is chosen module and is comprised: module is chosen in rank determination module, determination type module and Target cell;
Described rank determination module is for determining the translational speed rank of described terminal;
Described determination type module is for determining the cell type corresponding with described translational speed rank;
Described Target cell determination module is used for the cell type determined according to described determination type module, from described candidate handover cell, choose described switching target small area.
11. cell merge devices as claimed in claim 10, it is characterized in that, described Target cell is chosen module and is conformed to the described cell type determined for choosing in described candidate handover cell, and at least one item in the quality of reception, incoming level, signal to noise ratio meets the community of predetermined condition as switching target small area.
12. cell merge devices as claimed in claim 10, it is characterized in that, described translational speed rank comprises: at a high speed, middling speed and low speed;
Described determination type module is used for:
When described translational speed rank is high speed, determine that with cell type corresponding be at a high speed macrocell;
When described translational speed rank is middling speed, determine that the cell type corresponding with middling speed is Microcell;
When described translational speed rank is low speed, determine that the cell type corresponding with low speed is picocell.
13. cell merge devices as claimed in claim 12, it is characterized in that, described determination type module also for: when there is not the cell type corresponding with described translational speed rank in described candidate handover cell, from the cell type included by described candidate handover cell, choose a kind of cell type according to preset rules.
14. cell merge devices as claimed in claim 13, it is characterized in that, when described translational speed rank is not at a high speed and when existing macrocell in described candidate handover cell, described preset rules comprises: first choose Microcell, if there is not Microcell in described candidate handover cell, then choose picocell again, if Zhong Bucun picocell, described candidate handover cell, then choosing cell type is again WLAN (wireless local area network) community;
When described translational speed rank is middling speed and there is not Microcell in described candidate handover cell, described preset rules comprises: first choose macrocell, if there is not macrocell in described candidate handover cell, then choose picocell again, if there is not picocell in described candidate handover cell, then choose WLAN (wireless local area network) community again;
When described translational speed rank is middling speed and there is not picocell in described candidate handover cell, described preset rules comprises: first choose WLAN (wireless local area network) community, if there is not WLAN (wireless local area network) community in described candidate handover cell, then choose Microcell again, if there is not Microcell in described candidate handover cell, then choose macrocell again.
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| CN201410484316.2A CN105491636A (en) | 2014-09-19 | 2014-09-19 | Cell switching method and device |
| PCT/CN2015/070508 WO2015131667A1 (en) | 2014-09-19 | 2015-01-12 | Method and device for cell handover and computer storage medium |
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| WO2015131667A1 (en) | 2015-09-11 |
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