CN101047942A - Load bridging method and device - Google Patents
Load bridging method and device Download PDFInfo
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- CN101047942A CN101047942A CNA2006100865365A CN200610086536A CN101047942A CN 101047942 A CN101047942 A CN 101047942A CN A2006100865365 A CNA2006100865365 A CN A2006100865365A CN 200610086536 A CN200610086536 A CN 200610086536A CN 101047942 A CN101047942 A CN 101047942A
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Abstract
This invention discloses a method for load splitting including: setting up synchronization among overlapped base stations belonged to local areas, when a base station tests that the current channel of its own can' t meet the needs of load, it asks for idle channels to local areas superpositioned with it and sends the idle channel identifications returned by local areas to the splitted user devices. This invention also discloses a device including: a synchronization set up module, a load test module, a determining module for splitted load areas and a load splitting module.
Description
Technical field
The present invention relates to wireless communication technology field, be specifically related to a kind of load bridging method and device.
Background technology
Radio area network (WRAN) is that international electric engineer (IEEE) association proposes in the IEEE802.22 working group of formal establishment of in October, 2004, the target of this working group is to use a kind of technology that is called cognitive radio, with very high frequency(VHF) (VHF)/hyperfrequency (UHF) frequency band of distributing to television broadcasting as: this frequency band is that the frequency of 54MHz～862MHz is as the broadband-access circuit in the North America.This is an another new wireless frequency application technology after 2002 realize civilian " radio ultra wide band system (UWB) ".What IEEE802.22 working group will formulate is the physical layer and medium access control (MAC) the layer specification of radio communication, frequency data communication is Mbit/ second number Mbit/ second～tens of, because the frequency of the wireless lan (wlan) in the frequency ratio past that television relay is used is lower, therefore the overlayable scope of base station equipment is very big, and radius surpasses 40km.The frequency band of 300MHz～400MHz will can be used for outdoor wide-band communication, if allow the power of base station, higher site to enter adjustment region, its maximum coverage range can reach 100km.The WRAN system is a kind of system that exempts to permit operation, by using the wireless technology of perception, the idle frequency band of seeking permitted user (LU) communicates, such as in the licensed band such as VHF/UHF of wireless digital TV-set (DTV), seeking does not have the carrying frequency range of occupied frequency range as the WRAN network.Simultaneously, also all exempt between the WRAN system to permit, can be used by a plurality of operators.
Because the WRAN system adopts the cognitive radio power technology to seek idle frequency band and communicates, if so there are a lot of subscriber equipmenies need use frequency spectrum resource in certain sub-district, and idle frequency band is limited, will cause the load of this sub-district excessive like this, thereby make the usable spectrum resource scarcity, influence systematic function.Prior art does not provide the solution of this aspect.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method and apparatus of load bridging, to solve excessive and frequency spectrum resource that the cause problem in short supply of cell load in the wireless communication system.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of load bridging method, this method comprises:
Set up between the base station under A, each sub-district of overlapping each other synchronously;
B, base station detect self current channel in sub-district can't satisfy load request, to with the base station requests idle channel of the sub-district of this little area overlapping, and according to the idle channel number that returns with the base station of the sub-district of this little area overlapping, the definite number of loads that need shunt with each sub-district of this little area overlapping sends to each sub-district respectively with this number of loads;
The idle channel ID that each sub-district is returned in C, base station sends to and respectively shunts subscriber equipment, and each is shunted subscriber equipment and connects according to the base station of this idle channel sign with each sub-district.
The described base station of step B determines that the number of loads that need shunt with each sub-district of this little area overlapping comprises: the number of loads whether the maximum empty idle channel number that the base station is judged and the base station of each sub-district of self little area overlapping is returned need be shunted more than or equal to self sub-district, if determine that this maximum empty idle channel number corresponding district is for dividing the sub-district of current load; Otherwise, according to the idle channel number, select to divide the sub-district of current load from high to low successively, divide the number of current load more than or equal to need until the sum of idle channel.
The described base station of step B determines that the number of loads that need shunt with each sub-district of this little area overlapping comprises:
The number of loads whether total number that the idle channel that returns with the base station of each sub-district of self little area overlapping is judged in the base station need be shunted more than or equal to self sub-district, if, with self each overlapping sub-district in select to divide the sub-district of current load, and determine that each sub-district need divide the number of current load; Otherwise, will with self all overlapping sub-district as the shunting loaded cell, and further comprise after the described step B: return step B carry out to the action of the base station requests idle channel of the sub-district of this little area overlapping.
Further comprise after the described step C: each is shunted subscriber equipment and discharges and being connected of affiliated base station, former sub-district.
A kind of load bridging device, this device comprises:
Set up module synchronously, be used for self base station and and the base station of the sub-district of self little area overlapping between set up synchronously, set up synchronously and finish, will set up indication synchronously and send;
The load detecting module, the channel that detects self sub-district is used for when can't satisfy load request and receive the synchronous foundation indication of setting up synchronously that module sends, send the idle channel requirement message to base station, and the idle channel number of each sub-district that each base station is returned sends with the sub-district of self little area overlapping;
Shunting loaded cell determination module, be used for behind the idle channel number of receiving each sub-district that the load detecting module is sent, in each sub-district, select to divide the sub-district of current load, and determine the number of loads that each sub-district need be shunted, the shunting number of loads of each sub-district of determining is sent to the base station of each sub-district, and the idle channel ID of each sub-district that each base station is returned sends;
The load bridging module is used for behind the idle channel ID that receives each sub-district that shunting loaded cell determination module is sent, and each idle channel ID is sent to respectively respectively shunt subscriber equipment.
Described shunting loaded cell determination module further comprises: the shunting loaded cell is selected module, be used to judge the number of loads whether maximum empty idle channel number that the load detecting module sends returns with the base station of each sub-district of self little area overlapping need be shunted more than or equal to self sub-district, if determine that this maximum empty idle channel number corresponding district is for dividing the sub-district of current load; Otherwise, according to the idle channel number, select to divide the sub-district of current load from high to low successively, divide the number of current load more than or equal to need until the sum of idle channel.
Described shunting loaded cell determination module further comprises: the shunting loaded cell is selected module, the number of loads whether total number that is used to judge the idle channel that the load detecting module sends returns with the base station of each sub-district of self little area overlapping need be shunted more than or equal to self sub-district, if, with self each overlapping sub-district in select to divide the sub-district of current load; Otherwise, will with self all overlapping sub-district as the shunting loaded cell.
Described shunting loaded cell selects module to be further used for, after the number of loads that the total number of the idle channel that returns in that judge that the load detecting module sends and the base station of each sub-district self little area overlapping need be shunted less than self sub-district, send to the load bridging module and to report the shunting indication that finishes, and receiving that shunting that the load bridging module is sent finishes after the indication, send the indication of idle channel demand to the load factor detection module
And described load detecting module is further used for, and after receiving that the shunting loaded cell is selected idle channel demand indication that module sends, sends the idle channel requirement message to the base station with the sub-district of self little area overlapping.
Compared with prior art, the present invention is by setting up between the base station under each sub-district that overlaps each other synchronously; The base station detects self current channel in sub-district can't satisfy load request, to with the base station requests idle channel of the sub-district of this little area overlapping, and the idle channel that each sub-district is returned sign sends to and respectively shunts subscriber equipment, the idle channel of the sub-district that overlaps each other by reasonable utilization, solved excessive and frequency spectrum resource that the cause problem in short supply of the cell load in the wireless communication system, and the present invention can select to shunt loaded cell flexibly according to the idle channel situation of the sub-district that respectively overlaps each other, further save Internet resources, and do not needed to increase overhead.In addition, the shunting subscriber equipment is before connecting with new sub-district, and being connected of maintenance always and former minizone guaranteed the continuity of user apparatus service, thereby guaranteed the QoS of subscriber equipment.
Description of drawings
Fig. 1 is the flow chart of load bridging provided by the invention;
The flow chart of the load bridging that Fig. 2 provides for the embodiment of the invention;
Fig. 3 is the device block diagram of load bridging provided by the invention.
Embodiment
Because when the overlapping region of minizone was the alien frequencies covering, there was not interference in the base station in the overlapping region.So core concept of the present invention is: between the base station under each sub-district that overlaps each other, set up synchronously, when the channel of certain sub-district can't satisfy load request, the base station of this sub-district to the base station requests idle channel of the sub-district of this little area overlapping, and according to the idle channel number of the sub-district of this little area overlapping, select the sub-district of shunting self load, then with the load bridging of this sub-district to this little area overlapping respectively shunt loaded cell.
The present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
Fig. 1 is the flow chart of load bridging provided by the invention, and as shown in Figure 1, its concrete steps are as follows:
Step 101: set up synchronously between the base station under each sub-district that overlaps each other.
Between the base station under each sub-district synchronously can be by being positioned at each minizone the subscriber equipment of overlapping region realize, therefore, after synchronous foundation, all set up synchronous between between the base station under each sub-district and the base station under each sub-district and the subscriber equipment that is positioned at the overlapping region.
The subscriber equipment that is positioned at the overlapping region of each minizone is called bridged subscriber's equipment.
Step 102: the base station detects self current channel in sub-district can't satisfy load request, sends the idle channel requirement message to the base station with the sub-district of this little area overlapping.
If can cover mutually between the base station under each sub-district that overlaps each other, then can directly communicate between each base station; If do not cover mutually, then communicate by bridged subscriber's equipment.
Step 103: after receiving this idle channel requirement message with the base station of the sub-district of this little area overlapping, calculate the idle channel number with self sub-district of this little area overlapping, the idle channel number of self cell ID and self sub-district is returned to the base station of sub-district.
Step 104: the idle channel number of sending with the base station of self overlapping sub-district is received in the base station of this sub-district, with self overlapping sub-district in select the sub-district of shunting self load, and determine respectively to shunt the number of loads that loaded cell need be shunted.
In this step, the base station of this sub-district can with the sub-district of this little area overlapping in select to divide the sub-district of current load arbitrarily.But in actual applications, in order to save Internet resources, the base station of this sub-district should be reduced the number of the sub-district of branch current load as far as possible.Therefore, the base station of this sub-district can select to divide the sub-district of current load by following steps:
After the idle channel number of sending with the base station of self overlapping sub-district is received in the base station of this sub-district, whether judge maximum empty idle channel number, if determine that this sub-district that maximum empty idle channel number is provided is the shunting loaded cell more than or equal to the shunting number of loads; Otherwise the number of the idle channel that provides according to the sub-district with self little area overlapping is selected the shunting loaded cell from high to low successively, up to total idle channel number of the shunting loaded cell of selecting more than or equal to the shunting number of loads.
Step 105: the base station of this sub-district sends the load bridging requirement message to the base station of shunting loaded cell, and this message is carried number of loads and the branch current load ID that the shunting loaded cell need be shunted.
Step 106: after this load bridging requirement message is received in the base station of shunting loaded cell, divide the identical idle channel of shunting number of loads of selecting number and load bridging requirement message to carry in the idle channel of sub-district of current load at need, the ID and the load ID of self cell ID, selected all idle channels returned to described this sub-district of step 102 by load bridging demand response message.
Step 107: after this load bridging demand response message was received in the base station of this sub-district, each idle channel ID that this message is carried sent to by the shunting Indication message respectively and respectively shunts subscriber equipment.
Step 108: after the shunting subscriber equipment is received and shunted Indication message, connect by this message idle channel ID that carries and the sub-district of dividing current load, connection is set up and is finished, and release is connected with the described sub-district of step 102.
Fig. 2 is the flow chart of the load bridging that provides of the embodiment of the invention, and as shown in Figure 2, its concrete steps are as follows:
Step 204: the idle channel number of sending with the base station of self overlapping sub-district is received in the base station of this sub-district, whether the sum of judging the idle channel that send the base station of all and self overlapping sub-district need divide the number of current load more than or equal to self, if, execution in step 205; Otherwise, execution in step 206.
Step 205: the base station of this sub-district with self overlapping sub-district in select the sub-district of shunting self load, and determine respectively to shunt the number of loads that loaded cell need be shunted, go to step 207.
Step 206: the base station of this sub-district is defined as all and self overlapping sub-district to shunt the sub-district of self load, and select the total branch current load that equates of number and idle channel as current branch current load, and the need of determining respectively the to shunt loaded cell idle channel number that divides the number of current load to equal this shunting loaded cell, go to step 207.
Step 211: the base station of this sub-district judges whether current this sub-district also exists needs to divide current load, if go to step 202 and carry out the action that sends the idle channel requirement message to the base station with the sub-district of this little area overlapping; Otherwise this flow process finishes.
Fig. 3 is the composition frame chart of load bridging device provided by the invention, this device is arranged in the base station, as shown in Figure 3, this device mainly comprises: set up module 31, load detecting module 32, shunting loaded cell determination module 33, load bridging module 34 synchronously, wherein:
Set up module 31 synchronously: be used for self base station, place, sub-district and and the base station of the sub-district of self little area overlapping between set up synchronously, set up synchronously and finish, send to load detecting module 32 and set up indication synchronously.
Load detecting module 32: be used for when the channel that detects self sub-district can't satisfy load request and receive the synchronous foundation indication of setting up synchronously that module 31 sends, send the idle channel requirement message to base station, and the idle channel number of each sub-district that each base station is returned sends to shunting loaded cell determination module 33 with the sub-district of self little area overlapping.
Shunting loaded cell determination module 33: be used for behind the idle channel number of receiving each sub-district that load detecting module 32 is sent, in each sub-district, select to divide the sub-district of current load, and determine the number of loads that each sub-district need be shunted, the shunting number of loads of each sub-district of determining is sent to the base station of each sub-district, and the idle channel ID of each sub-district that each base station is returned sends to load bridging module 34.
Further, shunting loaded cell determination module 33 comprises a shunting loaded cell selection module, be used to judge the number of loads whether the maximum empty idle channel number that the base station of load detecting module 32 each sub-district with self little area overlapping that send returns need be shunted more than or equal to self sub-district, if determine that this maximum empty idle channel number corresponding district is for dividing the sub-district of current load; Otherwise, according to the idle channel number, select to divide the sub-district of current load from high to low successively, divide the number of current load more than or equal to need until the sum of idle channel.
Perhaps, the number of loads whether the shunting loaded cell selects total number that module is used to judge the idle channel that the base station of load detecting module 32 each sub-district with self little area overlapping that send is returned need shunt more than or equal to self sub-district, if, with self each overlapping sub-district in select to divide the sub-district of current load; Otherwise, will with self all overlapping sub-district as the shunting loaded cell, and send to load bridging module 34 and to report the shunting indication that finishes, and receiving that shunting that load bridging module 34 is sent finishes after the indication, sends the idle channel demands to load factor detection module 32 and indicates.
And described load bridging module 34 is further used for, the indication that finishes is shunted in reporting that reception shunting loaded cell determination module 33 is sent, and idle channel ID is all sent to respectively shunt subscriber equipment after, send the shunting indication that finishes to shunting loaded cell determination module 33;
Described load detecting module 32 is further used for, and after receiving the idle channel demand indication that shunting loaded cell determination module 33 is sent, sends the idle channel requirement message to the base station with the sub-district of self little area overlapping.
Load bridging module 34: be used for behind the idle channel ID that receives each sub-district that shunting loaded cell determination module 33 is sent, each idle channel ID sent to respectively respectively shunt subscriber equipment.
It is the system that alien frequencies covers that the present invention can be applicable to the overlapping region, as: in the WRAN system.
The above only is process of the present invention and method embodiment, in order to restriction the present invention, all any modifications of being made within the spirit and principles in the present invention, is not equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1, a kind of load bridging method is characterized in that, this method comprises:
Set up between the base station under A, each sub-district of overlapping each other synchronously;
B, base station detect self current channel in sub-district can't satisfy load request, to with the base station requests idle channel of the sub-district of this little area overlapping, and according to the idle channel number that returns with the base station of the sub-district of this little area overlapping, the definite number of loads that need shunt with each sub-district of this little area overlapping sends to each sub-district respectively with this number of loads;
The idle channel sign ID that each sub-district is returned in C, base station sends to and respectively shunts subscriber equipment, and each is shunted subscriber equipment and connects according to the base station of this idle channel sign with each sub-district.
2, the method for claim 1, it is characterized in that, the described base station of step B determines that the number of loads that need shunt with each sub-district of this little area overlapping comprises: the number of loads whether the maximum empty idle channel number that the base station is judged and the base station of each sub-district of self little area overlapping is returned need be shunted more than or equal to self sub-district, if determine that this maximum empty idle channel number corresponding district is for dividing the sub-district of current load; Otherwise, according to the idle channel number, select to divide the sub-district of current load from high to low successively, divide the number of current load more than or equal to need until the sum of idle channel.
3, the method for claim 1 is characterized in that, the described base station of step B determines that the number of loads that need shunt with each sub-district of this little area overlapping comprises:
The number of loads whether total number that the idle channel that returns with the base station of each sub-district of self little area overlapping is judged in the base station need be shunted more than or equal to self sub-district, if, with self each overlapping sub-district in select to divide the sub-district of current load, and determine that each sub-district need divide the number of current load; Otherwise, will with self all overlapping sub-district as the shunting loaded cell, and further comprise after the described step B: return step B carry out to the action of the base station requests idle channel of the sub-district of this little area overlapping.
4, the method for claim 1 is characterized in that, further comprises after the described step C: each is shunted subscriber equipment and discharges and being connected of affiliated base station, former sub-district.
5, a kind of load bridging device is characterized in that, this device comprises:
Set up module synchronously, be used for self base station and and the base station of the sub-district of self little area overlapping between set up synchronously, set up synchronously and finish, will set up indication synchronously and send;
The load detecting module, the channel that detects self sub-district is used for when can't satisfy load request and receive the synchronous foundation indication of setting up synchronously that module sends, send the idle channel requirement message to base station, and the idle channel number of each sub-district that each base station is returned sends with the sub-district of self little area overlapping;
Shunting loaded cell determination module, be used for behind the idle channel number of receiving each sub-district that the load detecting module is sent, in each sub-district, select to divide the sub-district of current load, and determine the number of loads that each sub-district need be shunted, the shunting number of loads of each sub-district of determining is sent to the base station of each sub-district, and the idle channel ID of each sub-district that each base station is returned sends;
The load bridging module is used for behind the idle channel ID that receives each sub-district that shunting loaded cell determination module is sent, and each idle channel ID is sent to respectively respectively shunt subscriber equipment.
6, device as claimed in claim 5, it is characterized in that, described shunting loaded cell determination module further comprises: the shunting loaded cell is selected module, be used to judge the number of loads whether maximum empty idle channel number that the load detecting module sends returns with the base station of each sub-district of self little area overlapping need be shunted more than or equal to self sub-district, if determine that this maximum empty idle channel number corresponding district is for dividing the sub-district of current load; Otherwise, according to the idle channel number, select to divide the sub-district of current load from high to low successively, divide the number of current load more than or equal to need until the sum of idle channel.
7, device as claimed in claim 5, it is characterized in that, described shunting loaded cell determination module further comprises: the shunting loaded cell is selected module, the number of loads whether total number that is used to judge the idle channel that the load detecting module sends returns with the base station of each sub-district of self little area overlapping need be shunted more than or equal to self sub-district, if, with self each overlapping sub-district in select to divide the sub-district of current load; Otherwise, will with self all overlapping sub-district as the shunting loaded cell.
8, device as claimed in claim 7, it is characterized in that, described shunting loaded cell selects module to be further used for, after the number of loads that the total number of the idle channel that returns in that judge that the load detecting module sends and the base station of each sub-district self little area overlapping need be shunted less than self sub-district, send to the load bridging module and to report the shunting indication that finishes, and receiving that shunting that the load bridging module is sent finishes after the indication, sends the indication of idle channel demand to the load factor detection module
And described load detecting module is further used for, and after receiving that the shunting loaded cell is selected idle channel demand indication that module sends, sends the idle channel requirement message to the base station with the sub-district of self little area overlapping.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100865365A CN100531432C (en) | 2006-06-20 | 2006-06-20 | Load bridging method and device |
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| CNB2006100865365A CN100531432C (en) | 2006-06-20 | 2006-06-20 | Load bridging method and device |
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| CN101047942A true CN101047942A (en) | 2007-10-03 |
| CN100531432C CN100531432C (en) | 2009-08-19 |
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| CNB2006100865365A Expired - Fee Related CN100531432C (en) | 2006-06-20 | 2006-06-20 | Load bridging method and device |
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| CN100531432C (en) | 2009-08-19 |
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