CN102118797A - Method for reporting load and method for reducing load for cell - Google Patents
Method for reporting load and method for reducing load for cell Download PDFInfo
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- CN102118797A CN102118797A CN2010106225725A CN201010622572A CN102118797A CN 102118797 A CN102118797 A CN 102118797A CN 2010106225725 A CN2010106225725 A CN 2010106225725A CN 201010622572 A CN201010622572 A CN 201010622572A CN 102118797 A CN102118797 A CN 102118797A
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Abstract
The invention relates to a method for reporting load and a method for reducing load for a cell. The method for reporting load comprises the following steps: the upper threshold and the lower threshold of each IRAT (Inter-Radio Access Technology) adjacent cell are determined according to the indication (in a request of a request cell) on current available capacity of the request cell as well as the parameters configured for all the IRAT adjacent cells; the resource state of each IRAT adjacent cell per se is monitored according to the upper threshold and the lower threshold; and when the resource state of each IRAT adjacent cell meets the report conditions, the IRAT adjacent cell sends a resource state report to the request cell. By adopting the methods, the load conditions of different systems in each cell can be better adjusted, and the purpose of balancing load of each cell can be better achieved.
Description
Technical field
The present invention relates to the mobile communication technology field, refer in particular to a kind of method of load report and the method that the sub-district alleviates load.
Background technology
In the prior art, generally all moving load equilibrium between using system (IRAT MLB) technology handle the unbalanced problem of traffic carrying capacity between a plurality of sub-districts of different system.Between said system in the moving load balancing technique, find traffic carrying capacity state between each sub-district by the resource status report mechanism usually, thereby rationally adjust the load state of each sub-district, improve utilization ratio of wireless resources.
For example, if when the load of certain the sub-district a in the wireless access technology (RAT) is in higher load condition, this sub-district a will start to its adjacent different wireless access technology (IRAT) sub-district, it is off-load (offload) algorithm of different RAT (IRAT) adjacent area, the user terminal (UE) of this sub-district a is switched in the corresponding IRAT adjacent area, to alleviate the load of this sub-district.
Fig. 1 is the schematic flow sheet of off-load algorithm of the prior art.As shown in Figure 1, off-load algorithm of the prior art generally comprises step as described below:
Step 101, its adjacent IRAT adjacent area report of request sub-district request resource status separately.
In this step, request sub-district a will send resource status report request to its adjacent IRAT adjacent area, ask each IRAT adjacent area report resource status separately.Wherein, can suppose that above-mentioned request sub-district a belongs to RAT A system.
Step 102, its other resources state is monitored according to the request of request sub-district in each IRAT adjacent area of above-mentioned request sub-district, and when satisfying report condition, sends the resource status report to the request sub-district.
In this step, the IRAT adjacent area will be set up corresponding reporting event, and begin to monitor its other resources state after the resource status report request that receives request sub-district a transmission; When the resource status of IRAT adjacent area satisfies report condition, this IRAT adjacent area will send the resource status report to request sub-district a.Wherein, the resource status that comprises this IRAT adjacent area in the described resource status report.
Step 103, the request sub-district is according to received resource status report, select target sub-district from each IRAT adjacent area.
In this step, request sub-district a is after the resource status report that receives each IRAT adjacent area transmission, will be according to the resource status of each IRAT adjacent area in the received resource status report, from each IRAT adjacent area, select at least one IRAT adjacent area as Target cell, for example, can establish selected Target cell is sub-district b, and this sub-district b belongs to RAT B system, and the RAT A system affiliated with asking sub-district a of this RAT B system is not same system.
Step 104, the request sub-district switches to selected Target cell with UE.
In this step, request sub-district a will carry out the off-load operation, be about to ask the UE among a of sub-district to switch to selected Target cell, to alleviate the load of request sub-district a.At this moment, Target cell b will receive request needs the UE that switches among a of sub-district.
As from the foregoing,, can find the traffic carrying capacity state between each sub-district of different system by the described off-load algorithm in above-mentioned step 101～104, thus the load state of balanced each sub-district.
In above-mentioned step 102, reporting event will be set up according to the request of request sub-district a in each IRAT adjacent area, monitoring its other resources state, and when satisfying report condition, send the resource status report to request sub-district a.Method in the above-mentioned steps 102 comes down to a kind of method of load report, below will be by way of example the method for above-mentioned load report be introduced.
Fig. 2 is the schematic diagram of the method for load report of the prior art.As shown in Figure 2, for certain IRAT adjacent area of request sub-district a, for example, sub-district b after the resource status report request that receives request sub-district a transmission, will set up corresponding reporting event, and begin to monitor its other resources state; When the resource status of sub-district b satisfies report condition, sub-district b will send the resource status report to request sub-district a.
Specifically, Operation and Maintenance platform (OM) can be provided with 4 parameters for this sub-district b in advance: Upper threshold T
u, Lower Threshold T
l, Upper threshold H lag time
AWith Lower Threshold H lag time
BTherefore, after above-mentioned reporting event is set up, if sub-district b discovery self active volume progressively is elevated to greater than above-mentioned Upper threshold T
u, and greater than above-mentioned Upper threshold T
uDuration more than or equal to above-mentioned Upper threshold H lag time
AThe time, then sub-district b will send the resource status report to request sub-district a, report the resource status of this sub-district b, promptly report the active volume of this sub-district b to request sub-district a, and wherein the unit of active volume is a percentage; And if sub-district b discovery self active volume progressively is reduced to less than above-mentioned Lower Threshold T
l, and less than above-mentioned Lower Threshold T
lDuration more than or equal to above-mentioned Lower Threshold H lag time
BThe time, then sub-district b also will send the resource status report to request sub-district a, report the resource status of this sub-district b.
For example, as shown in Figure 2, solid line is the active volume curve of sub-district b, and expression sub-district b is in each active volume constantly; Simultaneously, suppose the Upper threshold T that OM is provided with for this sub-district b
uBe 70 (unit is a percentage), Lower Threshold T
lBe 30 (unit is a percentage).As shown in Figure 2, above-mentioned sub-district b is at t
1The time, its active volume begins greater than 70%, and at t
1Afterwards, the active volume of sub-district b greater than duration of 70% greater than H
A, therefore, this sub-district b will be at (t
1+ H
A) time send the resource status report to request sub-district a, report the current active volume of this sub-district b to request sub-district a, promptly this sub-district b is at (t
1+ H
A) time active volume; This incident can be described as to request sub-district a reporting event A.
At t
2The time, the active volume of this sub-district b begins less than 30%, but at t
2Afterwards, the active volume of sub-district b less than duration of 30% less than H
B, therefore, this sub-district b does not send the resource status report to request sub-district a;
And at t
3The time, the active volume of this sub-district b begins less than 30%, and at t
3Afterwards, the active volume of sub-district b less than duration of 30% greater than H
B, therefore, this sub-district b will be at (t
3+ H
B) time send the resource status report to request sub-district a, report the current active volume of this sub-district b to request sub-district a, promptly this sub-district b is at (t
3+ H
B) time active volume; This incident can be described as to request sub-district a reporting event B;
At t
4The time, the active volume of this sub-district b begins greater than 70%, but at t
4Afterwards, the active volume of sub-district b greater than duration of 70% less than H
A, therefore, this sub-district b does not send the resource status report to request sub-district a.
In the prior art, use above-mentioned load report method, will cause some problems, below will still describe by way of example.
For example, establishing and asking the current active volume of sub-district a this moment is 10%, is in higher load condition, need carry out off-load, has therefore started the off-load algorithm, has sent resource status report request to its each IRAT adjacent area.If sub-district b, c are the IRAT adjacent area of request sub-district a, OM is the set Upper threshold T of sub-district b, c
uWith Lower Threshold T
lBe 70 and 30, the current active volume of sub-district b is 55%, the current active volume of sub-district c be 25% and lasting incident greater than Lower Threshold H lag time
BAt this moment, because the active volume of sub-district b is greater than 30% and less than 70%, therefore, sub-district b will can not send the resource status report to request sub-district a; Sub-district c has been then owing to satisfied report condition, so sub-district c will send the resource status report to request sub-district a, report the current active volume of this sub-district c.Owing to receiving the resource status report of sub-district b, request sub-district a do not received the resource status report of sub-district c, therefore ask sub-district a and do not know the resource status of sub-district b, so can not select sub-district b as Target cell, and the current active volume 25% of sub-district c is greater than the active volume 10% of request sub-district a, therefore, when even sub-district c self has been in overload (overload) state, above-mentioned request sub-district a still can select sub-district c to carry out the off-load operation as Target cell, and the UE among the request sub-district a is switched to sub-district c.
As from the foregoing, because OM is the set Upper threshold T of sub-district b, c
uWith Lower Threshold T
lBe fixed value, therefore when the active volume of sub-district b during obviously greater than the active volume of sub-district c, but request sub-district a still may select the little sub-district c of active volume to carry out off-load as Target cell, and can not select the big sub-district b of active volume to carry out off-load, thereby fail to adjust well the load state of each sub-district, realize good load balancing; In addition, because sub-district c is when himself transshipping, to the active volume that remains this sub-district c of asking sub-district a to report, and request sub-district a and do not know the Lower Threshold of sub-district c, can only judge whether to carry out off-load by the active volume that receives, therefore make and call request sub-district a under the situation of Target cell overload, still can carry out the off-load operation to sub-district c, increased the weight of the load of Target cell c, thereby can not regulate the load state of each sub-district of different system well, realize good load balancing.
Summary of the invention
The invention provides a kind of method of load report and the method that the sub-district alleviates load, thereby can regulate the load state of each sub-district of different system better, realize the load balancing of each sub-district preferably.
For achieving the above object, the technical scheme among the present invention is achieved in that
A kind of method of load report, this method comprises:
According in the request of request sub-district to the indication of current active volume of request sub-district, and the configuration parameter of the different wireless access technology IRAT adjacent area self of described request sub-district is determined the Upper threshold and the Lower Threshold of each IRAT adjacent area;
Each IRAT adjacent area is according to described Lower Threshold and Upper threshold monitoring its other resources state; When the resource status of IRAT adjacent area satisfied report condition, the IRAT adjacent area sent the resource status report to the described request sub-district.
The configuration parameter of described IRAT adjacent area self comprises: overload threshold, Lower Threshold parameter and Upper threshold parameter.
Described according in the request of request sub-district to the indication of current active volume of request sub-district, and the configuration parameter of the different wireless access technology IRAT adjacent area self of described request sub-district, determine that the Upper threshold of each IRAT adjacent area and Lower Threshold comprise:
According to the current active volume of described request sub-district and overload threshold, Lower Threshold parameter and the Upper threshold parameter of each IRAT adjacent area, determine the Upper threshold and the Lower Threshold of each IRAT adjacent area.
The formula of determining the Lower Threshold of each IRAT adjacent area is:
Threshold
lower＝MAX(AC
Cell?a+D
1，Threshold
overload)
Wherein, described Threshold
LowerLower Threshold for the IRAT adjacent area; AC
Cell aCurrent active volume for the request sub-district; D
1Be the Lower Threshold parameter; Threshold
OverloadOverload threshold for the IRAT adjacent area; MAX represents to get peaked operation.
The formula of determining the Upper threshold of each IRAT adjacent area is:
Threshold
upper＝MAX(AC
Cell?a+D
2，Threshold
lower)
Wherein, described Threshold
UpperUpper threshold for the IRAT adjacent area; D
2Be the Upper threshold parameter.
Described report condition is:
Active volume when the IRAT adjacent area progressively is elevated to greater than Upper threshold, and greater than duration of Upper threshold more than or equal to Upper threshold during lag time, described IRAT adjacent area sends the resource status report to the request sub-district, reports the actual active volume of described IRAT adjacent area;
Active volume when described IRAT adjacent area progressively is reduced to less than Lower Threshold, and less than duration of Lower Threshold more than or equal to Lower Threshold during lag time, then described IRAT adjacent area will send the resource status report to the request sub-district, report described IRAT the active volume of adjacent area.
Described report condition also further comprises:
When the active volume of described IRAT adjacent area more than or equal to Lower Threshold and when being less than or equal to Upper threshold, described IRAT adjacent area does not send the resource status report to the request sub-district.
At least comprise in the described resource status report: the active volume of described IRAT adjacent area.
This method further comprises:
When the current active volume of described IRAT adjacent area during less than Lower Threshold, the active volume of included described IRAT adjacent area is 0 in the resource status report that described IRAT adjacent area is sent.
Before the Upper threshold and Lower Threshold of determining each IRAT adjacent area, this method further comprises:
When the request sub-district need alleviate the load of sub-district, the described request sub-district sent resource status report request to its adjacent IRAT adjacent area, asked each IRAT adjacent area report resource status separately.
This method further comprises:
When the request sub-district judges that according to the resource status report of Target cell the resource status of described Target cell is an overload, perhaps when the resource status of request sub-district breaks away from overload, the described request sub-district sends the report termination messages to each IRAT adjacent area, and stops to carry out the UE switching to Target cell.
The method that also provides a kind of sub-district to alleviate load among the present invention, this method comprises:
Its adjacent IRAT adjacent area report of request sub-district request resource status separately;
Each IRAT adjacent area according in the request of described request sub-district to the indication of current active volume of request sub-district and the configuration parameter of each IRAT adjacent area self, determine the Upper threshold and the Lower Threshold of each IRAT adjacent area, according to described Lower Threshold and Upper threshold monitoring its other resources state; When the resource status of IRAT adjacent area satisfied report condition, the IRAT adjacent area sent the resource status report to the request sub-district;
The request sub-district is according to received resource status report, select target sub-district from each IRAT adjacent area;
The request sub-district switches to selected Target cell with UE.
This method further comprises:
When the request sub-district judges that according to the resource status report of Target cell the resource status of described Target cell is overload, perhaps when the resource status of request sub-district breaks away from overload, the described request sub-district sends the report termination messages to described Target cell, and stops to carry out the UE switching to Target cell;
Described Target cell stops to send the resource status report to the request sub-district according to received report termination messages.
In summary, a kind of method of load report and the method that the sub-district alleviates load are provided among the present invention.In the method for described load report, since each IRAT adjacent area can according in the request of request sub-district to the indication of current active volume of request sub-district and the configuration parameter of each IRAT adjacent area self, determine the Upper threshold and the Lower Threshold of each IRAT adjacent area, each IRAT adjacent area is again according to above-mentioned Lower Threshold and Upper threshold monitoring its other resources state then, and when the resource status of IRAT adjacent area satisfies report condition, the IRAT adjacent area sends the resource status report to the request sub-district, thereby can regulate the load state of each sub-district of different system better, realize the load balancing of each sub-district preferably.
Description of drawings
Fig. 1 is the schematic flow sheet of off-load algorithm of the prior art.
Fig. 2 is the schematic diagram of the method for load report of the prior art.
Fig. 3 is the schematic flow sheet of the method for the load report among the present invention.
Fig. 4 is the schematic diagram of the method for the load report among the present invention.
Fig. 5 alleviates the schematic flow sheet of the method for load for the sub-district among the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention express clearlyer, the present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
The invention provides a kind of method of load report and the method that the sub-district alleviates load.In the method for load report, each IRAT adjacent area can be according to the request of request sub-district, the current active volume and the overload threshold of request sub-district, determine the Upper threshold and the Lower Threshold of each IRAT adjacent area, each IRAT adjacent area is again according to above-mentioned Lower Threshold and Upper threshold monitoring its other resources state then, and when the resource status of IRAT adjacent area satisfies report condition, the IRAT adjacent area sends the resource status report to the request sub-district, thereby can regulate the load state of each sub-district of different system better, realize the load balancing of each sub-district preferably.
Fig. 3 is the schematic flow sheet of the method for the load report among the present invention.As shown in Figure 3, in the method for load report in the present invention, mainly comprise step as described below:
In this step, each IRAT adjacent area will be according to Upper threshold and the Lower Threshold of in the request of request sub-district the configuration parameter of the indication of current active volume of request sub-district and each IRAT adjacent area self being determined each IRAT adjacent area.Wherein, can the various parameters that can determine above-mentioned Upper threshold and Lower Threshold that set in advance in the configuration parameter of described IRAT adjacent area self, for example: overload threshold.
In addition, at (before promptly determining the Upper threshold and Lower Threshold of each IRAT adjacent area) before this step 301, this method can further include: when the request sub-district need alleviate the load of sub-district, request sub-district a can send resource status report request (Cell Load Reporting Request) to its adjacent IRAT adjacent area, asks each IRAT adjacent area report resource status separately.Wherein, comprise indication in the above-mentioned resource status report request at least, the current active volume that promptly should ask sub-district a to the current active volume of request sub-district.
Each IRAT adjacent area can be known the current active volume AC of request sub-district a according to this resource status report request after the resource status report request that receives request sub-district a
Cell a, and according to the current active volume AC that asks sub-district a
Cell aWith the configuration parameter of IRAT adjacent area self, for example, the overload threshold Threshold of the IRAT adjacent area that sets in advance
Overload, determine the Lower Threshold Threshold of IRAT adjacent area
LowerWith Upper threshold Threshold
Upper
For example, in specific embodiments of the invention, each IRAT adjacent area can set in advance 3 configuration parameter: overload threshold Threshold according to practical situations
Overload, Lower Threshold parameter D
1With Upper threshold parameter D
2, the configuration parameter of promptly described IRAT adjacent area self comprises: overload threshold, Lower Threshold parameter and Upper threshold parameter.Wherein, D
2＞D
1Above-mentioned 3 parameters all can be set up on their own by the OM of each IRAT adjacent area, or are provided with by predetermined algorithm, and when the active volume of IRAT adjacent area during less than overload threshold, then this IRAT adjacent area will be in overload.
According to the current active volume of request sub-district a and 3 above-mentioned parameters, can determine the Upper threshold and the Lower Threshold of IRAT adjacent area.For example, can be according to current active volume, overload threshold and the Lower Threshold parameter D of request sub-district a
1Determine the Lower Threshold Threshold of IRAT adjacent area
Lower, concrete formula can for:
Threshold
lower＝MAX(AC
Cell?a+D
1，Threshold
overload) (1)
Wherein, MAX represents to get peaked operation.
In addition, also can be according to current active volume, Lower Threshold and the Upper threshold parameter D of request sub-district a
2Determine the Upper threshold Threshold of IRAT adjacent area
Upper, concrete formula can for:
Threshold
upper＝MAX(AC
Cell?a+D
2，Threshold
lower) (2)
In this step, above-mentioned report condition can set in advance according to practical situations.For example, above-mentioned report condition can be:
Condition 1, the active volume when the IRAT adjacent area progressively are elevated to greater than Upper threshold, and greater than duration of Upper threshold more than or equal to Upper threshold H lag time
AThe time, this IRAT adjacent area sends the resource status report to request sub-district a, reports the actual active volume of this IRAT adjacent area, and wherein the unit of active volume is a percentage;
Condition 2, the active volume when the IRAT adjacent area progressively are reduced to less than Lower Threshold, and less than duration of Lower Threshold more than or equal to Lower Threshold H lag time
BThe time, then this IRAT adjacent area will send the resource status report to request sub-district a, report the active volume of this IRAT adjacent area.
In addition, in specific embodiments of the invention, above-mentioned report condition can further include:
Condition 3, when the active volume of IRAT adjacent area more than or equal to Lower Threshold and when being less than or equal to Upper threshold, this IRAT adjacent area does not send the resource status report to request sub-district a, promptly the active volume of this IRAT adjacent area is not reported to request sub-district a in this IRAT adjacent area.
Wherein, in above-mentioned report condition, above-mentioned IRAT adjacent area comprises the active volume of this IRAT adjacent area at least in the resource status report that request sub-district a is sent.
Preferable, in specific embodiments of the invention, when the IRAT adjacent area when request sub-district a sends the resource status report, if the current active volume of this IRAT adjacent area is less than Lower Threshold Threshold
Lower, then the active volume of this included IRAT adjacent area is 0 in the resource status report that this IRAT adjacent area is sent, rather than the actual active volume of this IRAT adjacent area, can not receive the UE that asks sub-district a clearly to represent this IRAT adjacent area.
Request sub-district a if the active volume that this IRAT adjacent area reports is not 0, then asks sub-district a the UE of self can be switched in this IRAT adjacent area after receiving the resource status report of IRAT adjacent area transmission, to alleviate the load of request sub-district a; If the active volume that this IRAT adjacent area reports is 0, then ask sub-district a the UE of self not to be switched in this IRAT adjacent area.
Therefore, as the active volume of IRAT adjacent area Lower Threshold Threshold less than this IRAT adjacent area
LowerDuration more than or equal to Lower Threshold H lag time
BThe time, this IRAT adjacent area will no longer receive the UE of request sub-district a, thereby avoid asking sub-district a that the UE of self is switched to this IRAT adjacent area, make the resource status of this IRAT adjacent area can not worsen more.
In addition, in specific embodiments of the invention, when request sub-district a breaks away from overload, request sub-district a will send the report termination messages to each IRAT adjacent area, send the resource status report to stop each IRAT adjacent area to request sub-district a, and stop to carry out the UE switching to Target cell.
Below, will with give an example mode the method for above-mentioned load report is further introduced.
For example, if sub-district b and sub-district c are the IRAT adjacent area of request sub-district a, when asking sub-district a when its IRAT adjacent area sends resource status report request, the active volume of request sub-district a is 10%, the active volume of sub-district b is 55%, and the active volume of sub-district c is 25%; Therefore, sub-district b and sub-district c will be known the active volume AC of request sub-district a according to received resource status report request
Cell aBe 10%.
If sub-district b and 3 parameters that sub-district c sets in advance are all distinguished corresponding identical, for example, the overload threshold Threshold of sub-district b and sub-district c
Overload=30, Lower Threshold parameter D
1=15, Upper threshold parameter D
2=25, unit is percentage.At this moment, can obtain Lower Threshold and Upper threshold respectively according to above-mentioned formula (1) and formula (2):
Threshold
lower＝MAX(10+15，30)＝30；
Threshold
upper＝MAX(10+25，30)＝35。
For sub-district b, when the active volume of sub-district b was 55%, this active volume was greater than above-mentioned Upper threshold 35%.If do not consider Upper threshold lag time, or the active volume of sub-district b is that duration of 55% is more than or equal to Upper threshold H lag time
AThe time, this sub-district b will send the resource status report to request sub-district a, and the active volume of reporting this sub-district b is 55%.
For sub-district c, when the active volume of sub-district c was 25%, this active volume was in overload less than above-mentioned Lower Threshold 30%.If do not consider Lower Threshold lag time, or the active volume of sub-district c is that duration of 25% is more than or equal to Lower Threshold H lag time
AThe time, this sub-district c will send the resource status report to request sub-district a, and the active volume of reporting this sub-district c is 0.
After the resource status report of request sub-district a according to sub-district b and sub-district c transmission, the active volume that can know sub-district b is 55%, and the active volume of sub-district c is 0, therefore, request sub-district a will can not select to be in the sub-district c of overload as Target cell, but select load condition better to obtain sub-district b as Target cell, and will ask the UE of sub-district a to switch among the b of sub-district, to alleviate the load of request sub-district a.At this moment, sub-district b will receive request needs the UE that switches among a of sub-district, thereby has regulated the load state of each sub-district of different system well, has realized the load balancing of each sub-district of different system.
Further, in order effectively to save the expense of signaling, in specific embodiments of the invention, can also further optimize above-mentioned report condition.
The reason of optimizing is: the active volume when the IRAT adjacent area progressively is reduced to less than Lower Threshold, and less than duration of Lower Threshold more than or equal to Lower Threshold H lag time
BThe time, this IRAT adjacent area has been in overload, has been not suitable for receiving the UE of request sub-district a again.If this IRAT adjacent area did not send the resource status report to request sub-district a before this, then ask sub-district a and do not know the active volume of this IRAT adjacent area, therefore can not select this IRAT adjacent area as Target cell, so this IRAT adjacent area there is no need to report the active volume of this IRAT adjacent area to request sub-district a; In addition, if this IRAT adjacent area sent the resource status report to request sub-district a before this, if but the active volume of this IRAT adjacent area in the last resource status report that sends is 0, ask this moment sub-district a to know that this IRAT adjacent area has been not suitable for receiving the UE of request sub-district a again, therefore also can not select this IRAT adjacent area as Target cell, this moment, this IRAT adjacent area also there is no need the active volume of this IRAT adjacent area in request sub-district a report more naturally.
As from the foregoing, the active volume when the IRAT adjacent area progressively is reduced to less than Lower Threshold, and less than duration of Lower Threshold more than or equal to Lower Threshold H lag time
BThe time, this IRAT adjacent area is not all to need to send the resource status report to request sub-district a at every turn, but can whether send the resource status report to request sub-district a according to the actual conditions decision, thereby can save the signaling consumption between system.
Therefore, in specific embodiments of the invention, through the report condition after optimization can for:
Condition 1, the active volume when the IRAT adjacent area progressively are elevated to greater than Upper threshold, and greater than duration of Upper threshold more than or equal to Upper threshold H lag time
AThe time, this IRAT adjacent area sends the resource status report to request sub-district a, reports the actual active volume of this IRAT adjacent area;
Condition 2, the active volume when the IRAT adjacent area progressively are reduced to less than Lower Threshold, and less than duration of Lower Threshold more than or equal to Lower Threshold H lag time
BThe time, if this IRAT adjacent area sent the resource status report to request sub-district a before this, and the active volume of this IRAT adjacent area in the last resource status report is not 0, then this IRAT adjacent area will send the resource status report to request sub-district a, and the active volume of reporting this IRAT adjacent area is 0; Otherwise this IRAT adjacent area does not send the resource status report to request sub-district a.
In addition, in specific embodiments of the invention, above-mentioned report condition can further include:
Condition 3, when the active volume of IRAT adjacent area more than or equal to Lower Threshold and when being less than or equal to Upper threshold, this IRAT adjacent area does not send the resource status report to request sub-district a.
Below will be further detailed with the report condition of illustrated method after to above-mentioned optimization.Fig. 4 is the schematic diagram of the method for the load report among the present invention.As shown in Figure 4, solid line is the active volume curve of sub-district b, and sub-district b is certain IRAT adjacent area of request sub-district a.
At t
1The time, the active volume of this sub-district b begins less than Lower Threshold, and at t
1Afterwards, the active volume of this sub-district b less than the duration of Lower Threshold greater than H
B, still, because before this, this IRAT adjacent area did not send the resource status report to request sub-district a, and therefore, this sub-district b does not send the resource status report to request sub-district a this moment, thereby can save the signaling consumption between system.
At t
2The time, the active volume of sub-district b begins greater than Upper threshold, and at t
2Afterwards, the active volume of sub-district b greater than the duration of Upper threshold greater than H
A, therefore, this sub-district b will be at (t
2+ H
A) time send the resource status report to request sub-district a, report this sub-district b the actual active volume of this moment to request sub-district a; This incident can be described as to request sub-district a reporting event A.
At t
3The time, the active volume of this sub-district b begins less than Lower Threshold, but at t
3Afterwards, the active volume of sub-district b less than the duration of Lower Threshold less than H
B, therefore, this sub-district b does not send the resource status report to request sub-district a.
At t
4The time, the active volume of this sub-district b begins less than Lower Threshold, and at t
4Afterwards, the active volume of this sub-district b less than the duration of Lower Threshold greater than H
B, because this IRAT adjacent area is at (t
2+ H
A) Shi Cengxiang request sub-district a sent the resource status report, promptly reported incident A to request sub-district a, therefore, this sub-district b will be at (t
4+ H
B) time send the resource status report to request sub-district a, the active volume of reporting this IRAT adjacent area is 0; This incident can be described as to request sub-district a reporting event B.
According to above-mentioned Fig. 4 and the report condition after further optimizing as can be known, the active volume when the IRAT adjacent area progressively is reduced to less than Lower Threshold, and less than duration of Lower Threshold more than or equal to Lower Threshold H lag time
BThe time, this IRAT adjacent area can't directly report that to request sub-district a the active volume of this IRAT adjacent area is 0, but judge earlier, and only sent the resource status report to request sub-district a before this in this IRAT adjacent area, and the active volume of this IRAT adjacent area in the last resource status report is not 0 o'clock, this IRAT adjacent area just can report that the active volume of this IRAT adjacent area is 0 to request sub-district a, thereby can save the signaling consumption between system greatly.
Based on the method for above-mentioned load report, also provide a kind of sub-district to alleviate the method for load among the present invention.Fig. 5 alleviates the schematic flow sheet of the method for load for the sub-district among the present invention.As shown in Figure 5, the method that alleviates load of the sub-district among the present invention mainly comprises step as described below:
Step 501, its adjacent IRAT adjacent area report of request sub-district request resource status separately.
In this step, when the request sub-district that belongs to RAT A system need alleviate the load of sub-district, request sub-district a will send resource status report request to its adjacent IRAT adjacent area, ask each IRAT adjacent area report resource status separately.Wherein, described resource status report request comprises the indication to the current active volume of request sub-district, the current active volume that promptly should ask sub-district a at least.
Step 502, each IRAT adjacent area according in the request of request sub-district to the indication of current active volume of request sub-district and the configuration parameter of each IRAT adjacent area self, determine the Upper threshold and the Lower Threshold of each IRAT adjacent area, according to above-mentioned Lower Threshold and Upper threshold monitoring its other resources state; When the resource status of IRAT adjacent area satisfied report condition, the IRAT adjacent area sent the resource status report to the request sub-district.
In this step, the IRAT adjacent area is after the resource status report request that receives request sub-district a transmission, will according in the request of request sub-district to the indication of current active volume of request sub-district and the configuration parameter of each IRAT adjacent area self, determine the Upper threshold and the Lower Threshold of each IRAT adjacent area; Then, begin to monitor its other resources state according to above-mentioned Lower Threshold and Upper threshold again.When the resource status of IRAT adjacent area satisfies report condition, this IRAT adjacent area will send the resource status report to request sub-district a.
Wherein, determine in this step that the related content of being put down in writing in content and the above-mentioned steps 302 of method, report condition and resource status report of method, monitoring its other resources state of the Upper threshold of each IRAT adjacent area and Lower Threshold is identical, do not repeat them here.
In addition, in this step, corresponding reporting event also will be set up before according to above-mentioned Lower Threshold and Upper threshold monitoring its other resources state in the IRAT adjacent area.
Step 503, the request sub-district is according to received resource status report, select target sub-district from each IRAT adjacent area.
In this step, request sub-district a is after the resource status report that receives each IRAT adjacent area transmission, will be according to the resource status of each IRAT adjacent area in the received resource status report, from each IRAT adjacent area, select at least one IRAT adjacent area as Target cell, for example, can establish the sub-district b that selected Target cell is a RAT B system.Wherein, the RAT A system affiliated with asking sub-district a of RAT B system is not same system.
Step 504, the request sub-district switches to selected Target cell with UE.
In this step, request sub-district a will carry out the off-load operation, be about to ask the UE among a of sub-district to switch to selected Target cell, to alleviate the load of request sub-district a.At this moment, Target cell b will receive request needs the UE that switches among a of sub-district.
In specific embodiments of the invention, by above-mentioned step 501～504, can make the sub-district that calls request in the off-load operation, will select the loading condition better cell to carry out the off-load operation as Target cell, and can not select the very heavy sub-district of load to carry out the off-load operation, thereby can regulate the load state of each sub-district of different system effectively, realize good load balancing.
Further, in specific embodiments of the invention, alleviate in the method for load, after above-mentioned steps 504, also can comprise step as described below in above-mentioned sub-district:
Step 505, when the request sub-district judges that according to the resource status report of Target cell the resource status of described Target cell is an overload, perhaps when the resource status of request sub-district breaks away from overload, the described request sub-district sends the report termination messages to described Target cell, and stops to carry out the UE switching to Target cell.
In this step, when Target cell b owing to the UE that receives too much or because other reasons is when making that the resource status of Target cell b becomes overload, because this Target cell b will carry this Target cell b in the resource status report that described request sub-district a sends resource state information (for example, the Upper threshold of the active volume of sub-district b, sub-district b and Lower Threshold etc.), whether the resource status of therefore asking sub-district a to judge described Target cell b according to the resource status report of Target cell b is overload.
And, when request sub-district a judges that the resource status of Target cell b is overload, perhaps when the resource status of request sub-district a breaks away from overload (i.e. the resource status of this request sub-district a change into from overload be not in overload), this request sub-district a will send the report termination messages to described Target cell b, and stop to carry out the UE switching to Target cell b.
Step 506, Target cell stop to send the resource status report to the request sub-district according to received report termination messages.
In this step, if Target cell b receives the report termination messages of request sub-district a, then Target cell b will stop the reporting event set up, stop to send resource status report to request sub-district a.
By above-mentioned step 505 and 506, the request sub-district can be when Target cell be in overload, or the load reduction of request sub-district self and when no longer being in overload, stop to carry out the off-load operation to Target cell, thereby also can alleviate the load of Target cell effectively, realize the load balancing of each sub-district of different system better.
In summary, the method for above-mentioned load report and the method that the sub-district alleviates load have been proposed in an embodiment of the present invention.In the method for above-mentioned load report, since each IRAT adjacent area can according in the request of request sub-district to the indication of current active volume of request sub-district and the configuration parameter of each IRAT adjacent area self, determine the Upper threshold and the Lower Threshold of each IRAT adjacent area, each IRAT adjacent area is again according to above-mentioned Lower Threshold and Upper threshold monitoring its other resources state then, and when the resource status of IRAT adjacent area satisfies report condition, the IRAT adjacent area sends the resource status report to the request sub-district, thereby can regulate the load state of each sub-district of different system better, realize the load balancing of each sub-district preferably.In addition because, when the active volume of IRAT adjacent area progressively be reduced to less than Lower Threshold and less than duration of Lower Threshold more than or equal to Lower Threshold H lag time
BThe time, this IRAT adjacent area only sent the resource status report to request sub-district a before this in this IRAT adjacent area, and the active volume of this IRAT adjacent area in the last resource status report is not 0 o'clock, just can report that the active volume of this IRAT adjacent area is 0, thereby can also save the signaling consumption between system greatly to request sub-district a.
And alleviate in the method for load in above-mentioned sub-district, because the request sub-district can be when Target cell be in overload, or the load reduction of request sub-district self and when no longer being in overload, stop to carry out the off-load operation to Target cell, thereby also can alleviate the load of Target cell effectively, realize the load balancing of each sub-district of different system better.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (13)
1. the method for a load report is characterized in that, this method comprises:
According in the request of request sub-district to the indication of current active volume of request sub-district, and the configuration parameter of the different wireless access technology IRAT adjacent area self of described request sub-district is determined the Upper threshold and the Lower Threshold of each IRAT adjacent area;
Each IRAT adjacent area is according to described Lower Threshold and Upper threshold monitoring its other resources state; When the resource status of IRAT adjacent area satisfied report condition, the IRAT adjacent area sent the resource status report to the described request sub-district.
2. method according to claim 1 is characterized in that,
The configuration parameter of described IRAT adjacent area self comprises: overload threshold, Lower Threshold parameter and Upper threshold parameter.
3. method according to claim 2, it is characterized in that, described according in the request of request sub-district to the indication of current active volume of request sub-district, and the configuration parameter of the different wireless access technology IRAT adjacent area self of described request sub-district, determine that the Upper threshold of each IRAT adjacent area and Lower Threshold comprise:
According to the current active volume of described request sub-district and overload threshold, Lower Threshold parameter and the Upper threshold parameter of each IRAT adjacent area, determine the Upper threshold and the Lower Threshold of each IRAT adjacent area.
4. method according to claim 3 is characterized in that, determines that the formula of the Lower Threshold of each IRAT adjacent area is:
Threshold
lower＝MAX(AC
Cell?a+D
1，Threshold
overload)
Wherein, described Threshold
LowerLower Threshold for the IRAT adjacent area; AC
Cell aCurrent active volume for the request sub-district; D
1Be the Lower Threshold parameter; Thresh
OldoverloadOverload threshold for the IRAT adjacent area; MAX represents to get peaked operation.
5. method according to claim 4 is characterized in that, determines that the formula of the Upper threshold of each IRAT adjacent area is:
Threshold
upper＝MAX(AC
Cell?a+D
2，Threshold
lower)
Wherein, described Threshold
UpperUpper threshold for the IRAT adjacent area; D
2Be the Upper threshold parameter.
6. method according to claim 1 is characterized in that, described report condition is:
Active volume when the IRAT adjacent area progressively is elevated to greater than Upper threshold, and greater than duration of Upper threshold more than or equal to Upper threshold during lag time, described IRAT adjacent area sends the resource status report to the request sub-district, reports the actual active volume of described IRAT adjacent area;
Active volume when described IRAT adjacent area progressively is reduced to less than Lower Threshold, and less than duration of Lower Threshold more than or equal to Lower Threshold during lag time, then described IRAT adjacent area will send the resource status report to the request sub-district, report described IRAT the active volume of adjacent area.
7. method according to claim 6 is characterized in that, described report condition also further comprises:
When the active volume of described IRAT adjacent area more than or equal to Lower Threshold and when being less than or equal to Upper threshold, described IRAT adjacent area does not send the resource status report to the request sub-district.
8. according to claim 6 or 7 described methods, it is characterized in that,
At least comprise in the described resource status report: the active volume of described IRAT adjacent area.
9. method according to claim 8 is characterized in that, this method further comprises:
When the current active volume of described IRAT adjacent area during less than Lower Threshold, the active volume of included described IRAT adjacent area is 0 in the resource status report that described IRAT adjacent area is sent.
10. method according to claim 1 is characterized in that, before the Upper threshold and Lower Threshold of determining each IRAT adjacent area, this method further comprises:
When the request sub-district need alleviate the load of sub-district, the described request sub-district sent resource status report request to its adjacent IRAT adjacent area, asked each IRAT adjacent area report resource status separately.
11. method according to claim 10 is characterized in that, this method further comprises:
When the request sub-district judges that according to the resource status report of Target cell the resource status of described Target cell is an overload, perhaps when the resource status of request sub-district breaks away from overload, the described request sub-district sends the report termination messages to each IRAT adjacent area, and stops to carry out the UE switching to Target cell.
12. a sub-district alleviates the method for load, it is characterized in that, this method comprises:
Its adjacent IRAT adjacent area report of request sub-district request resource status separately;
Each IRAT adjacent area according in the request of described request sub-district to the indication of current active volume of request sub-district and the configuration parameter of each IRAT adjacent area self, determine the Upper threshold and the Lower Threshold of each IRAT adjacent area, according to described Lower Threshold and Upper threshold monitoring its other resources state; When the resource status of IRAT adjacent area satisfied report condition, the IRAT adjacent area sent the resource status report to the request sub-district;
The request sub-district is according to received resource status report, select target sub-district from each IRAT adjacent area;
The request sub-district switches to selected Target cell with UE.
13. method according to claim 12 is characterized in that, this method further comprises:
When the request sub-district judges that according to the resource status report of Target cell the resource status of described Target cell is overload, perhaps when the resource status of request sub-district breaks away from overload, the described request sub-district sends the report termination messages to described Target cell, and stops to carry out the UE switching to Target cell;
Described Target cell stops to send the resource status report to the request sub-district according to received report termination messages.
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