CN101938783B - Method and system for realizing load balance - Google Patents
Method and system for realizing load balance Download PDFInfo
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- CN101938783B CN101938783B CN200910088611.5A CN200910088611A CN101938783B CN 101938783 B CN101938783 B CN 101938783B CN 200910088611 A CN200910088611 A CN 200910088611A CN 101938783 B CN101938783 B CN 101938783B
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- picocell base
- picocell
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/08—Load balancing or load distribution
- H04W28/086—Load balancing or load distribution among access entities
- H04W28/0861—Load balancing or load distribution among access entities between base stations
- H04W28/0862—Load balancing or load distribution among access entities between base stations of same hierarchy level
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
- H04W88/10—Access point devices adapted for operation in multiple networks, e.g. multi-mode access points
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/042—Public Land Mobile systems, e.g. cellular systems
- H04W84/045—Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B
Abstract
The invention discloses a method for realizing load balance. The method comprises the following steps that: a picocell base station receives indication of indication transmitting equipment and converts the type of the picocell base station into a second type from a first type; and furthermore, a mobile station can access the picocell base station with a converted type or a neighboring cell. The invention also discloses another method for realizing the load balance and a system for realizing the load balance. The method and the system can solve the load balance problem of the picocell under different situations, so that the stability and the service quality of the system are improved.
Description
Technical field
The present invention relates to load-balancing technique, particularly relate to the method and system that realize load balancing in a kind of cordless communication network between the picocell base station and other base stations.
Background technology
Usually, wireless communication system uses electromagnetic wave and wireless communication terminal fixing or that move to communicate, and wherein, described wireless communication terminal can be mobile radiotelephone or the notebook computer of having wireless communication card etc., can abbreviate terminal as.In general, terminal all is positioned within the wireless coverage of system, and the wave frequency of distributing to these terminals is divided into a plurality of carrier frequencies as radio communication channel, wireless communication system utilizes the specific radio communication channel to provide wireless coverage in certain geographic range by the base station, and this geographic range is called the residential quarter.In theory, the base station generally should be positioned at the central authorities of residential quarter.
The cordless communication network development so far, except the public network macrocell that service is provided for the public, different picocells picocell (Femtocell) also appearred,, for example the network of home-ranges, office's scope or campus-wide has application scenarios separately.The purpose of picocell is in order to remedy the public network base station, i.e. the weakness of the indoor covering deficiency of macro base station (Macro BS) is for the mobile subscriber provides ubiquitous high-quality wireless access.The user can oneself buy or picocell base station (Femtocell BS) is installed, and general, picocell base station coverage area radius is approximately tens meters.As shown in Figure 1, what broken circle constituted is the macrocell that macro base station covers, what the dotted line hexagon constituted is the picocell that the picocell base station covers, picocell generally is positioned at the inside of public network macrocell, and general using existing wired network is as cable, digital subscriber line (DSL, Digital Subscriber Line) or Ethernet, as backhaul (backhaul) access network, wherein, network comprises access service network and/or connection service network.
In addition, as shown in Figure 2, picocell base station user group can be divided into open user's group (OSG, opensubscriber group) and closed user group (CSG, closed subscriber group), wherein, open the picocell base station of the user group any portable terminal in can the access service zone; And for the picocell base station of closed user group, except nonemergency, generally can only insert the terminal of the service of having subscribed, that is: belong to the member of closed user group, as the user terminal of private base station or the other-end of this user approval are installed, non-closed user group membership generally can not enjoy this residential quarter service.Further, closed user group can also be divided into partially enclosed user's group (CSG-Open) and complete closed user group (CSG-Closed), concrete, the picocell base station of partially enclosed user's group provides the service except the user for this closed user group, can also be for non-closed user group user provide low priority service, but being the QoS of customer of closed user group, prerequisite can not be affected; And the picocell base station of complete closed user group can only provide service for the user of this closed user group.
In the prior art, when a lot of users inserted certain macro base station simultaneously, as the macro base station of hot zones, congested (congestion) just may take place because load is overweight, and then cause service quality low in this macro base station.At this moment, need this macro base station subordinate's picocell base station to assist to bear load, if the base station of complete closed user group can be converted to the bearing of base station load of partially enclosed user's group can be more efficient.Perhaps, the picocell of OSG and/or CSG-Open is when the macro base station load is overweight, and also possible load is overweight, therefore, needs the picocell of CSG to change job category, carries out load balancing with the picocell of assisting OSG and/or CSG-Open.
In addition, if the picocell base station of complete closed user's group can be converted to the picocell base station of partially enclosed user's group, so, closing on the macro base station load just often, also need conversion to go back, but this moment, if change back simultaneously the picocell base station of a plurality of complete closed user group, will cause great amount of terminals to switch to macro base station simultaneously, also can cause the instability of system and service quality to descend.
How to coordinate the problem of load balancing under the various loading conditions, do not propose suitable solution at present as yet.In addition, load balancing is coordinated often relevant with interference control, therefore, solves the relevant issues of load balancing, can further solve the control problem of disturbance response.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method and system that realize load balancing, can solve the problem of load balancing of picocell under different scenes, improves the stability of a system and service quality.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides a kind of method that realizes load balancing, comprising: the indication of indication transmitting apparatus is received in the picocell base station, and self type is converted to second type by the first kind.
In the such scheme, after the conversion of picocell base station type, this method also comprises: the picocell base station after the mobile radio station access translation type or mobile radio station insert the adjacent base station of the picocell base station after the translation type.
In the such scheme, the picocell base station that described mobile radio station inserts after the translation type is: described mobile radio station switches to the picocell base station after the translation type; And/or described mobile radio station initially inserts the picocell base station after the translation type.
In the such scheme, after the translation type of described picocell base station, this method further comprises: send and feed back to the indication transmitting apparatus.
In the such scheme, after described indication transmitting apparatus was received feedback information, this method further comprised: with feedback information informing network or other base stations.
In the such scheme, the picocell base station receives before the indication, and this method also comprises: the picocell base station sends self working state information to the indication transmitting apparatus.
Wherein, the picocell base station sends self working state information to network, and this method also comprises: network is notified other base stations with the work state information of receiving.Described picocell base station sends work state information: the picocell base station initiatively sends; Or in response to the work state information transmission of indicating transmitting apparatus.
In the such scheme, the described first kind is the picocell base station of complete closed user group, and second type is the picocell base station of partially enclosed user's group; Or the described first kind is the picocell base station of partially enclosed user group, and second type is the picocell base station of complete closed user group.The described type identification that is converted to the described picocell base station physical layer of change and/or media access control layer signal description.
Described indication transmitting apparatus is that macro base station or open user organize picocell base station or network.Described indication transmitting apparatus is that macro base station or open user organize the picocell base station, and described indication sends eating dishes without rice or wine by the base station; And/or described indication transmitting apparatus is network, and described indication sends in backhaul network by network.Described indication sends by eating dishes without rice or wine, and send mode is the combination of following one or more modes: broadcasting, multicast, clean culture.Described indication is carried in the Downlink Control Information.Described indication is carried in the control information of physical layer; And/or be carried in the administrative messag of media access control layer.
This method further comprises: system is that the interacting message between the base station distributes specific resources; Described specific resources is time resource and/or frequency resource and/or connection identifier resource.
In the such scheme, described feedback information comprises conversion success or not information and/or the resource information of picocell base station and/or the load information of picocell; Described resource information is for using resource information and/or idling-resource information.
The present invention also provides a kind of method that realizes load balancing, comprising: the indication of indication transmitting apparatus is received in the picocell base station, and the mobile radio station that need are switched adds the mobile radio station classification that can insert; Described mobile radio station inserts described picocell base station.
In the such scheme, before described mobile radio station inserted described picocell base station, this method further comprised: notify the described mobile radio station that needs switching with target picocell base station, described mobile radio station switches to described target picocell base station.
In the such scheme, the described mobile radio station that will switch adds the mobile radio station classification that can insert and is: described mobile radio station is added closed user group and/or corresponding service class is set.
The present invention provides a kind of system that realizes load balancing again, comprises indication transmitting apparatus, picocell base station and mobile radio station; Wherein,
The indication transmitting apparatus is used to indicate picocell base station translation type, or the mobile station information of notifying the picocell base station to switch;
The picocell base station, be used for to receive indication and change self type, mobile radio station classification that the mobile radio station adding that maybe will switch can insert;
Mobile radio station is for the picocell base station after the access translation type or its adjacent base station or switching picocell base station.
In the such scheme, described picocell base station also is used for to indication transmitting apparatus feedback information; Also be used to indicate the non-closed user group mobile radio station of subordinate and switch to macro base station.
The method and system of realization load balancing provided by the present invention, the indication of other base stations or network is received in the picocell base station, self type is converted to picocell base station under second type or the handover of mobile stations from the first kind, make CSG-closed be converted to CSG-Open or CSG-open is converted to CSG-closed, thereby make the picocell base station under multiple different scenes, to realize load balancing, and then stability and the service quality of raising system, for example original a large amount of adjacent areas are disturbed and can be inhibited.
When specific implementation, indication can be sent by other base stations and/or network; Other base stations can be macro base stations, also can be that open user organizes the picocell base station; Other base stations or network also can send to the work state information of other base stations the picocell base station, and described job information can carry by medium Access Layer (MAC) message, also can carry by the physical layer control information.In a word, execution mode flexible, various, be easy to realize.
Description of drawings
Fig. 1 is the network topology structure schematic diagram;
Fig. 2 is the situation schematic diagram of dissimilar user's groups under the picocell base station;
Fig. 3 is picocell base station operation view;
Fig. 4 to Figure 43 is the realization flow schematic diagram of the embodiment of the invention one to embodiment 40;
Figure 44 to Figure 46 is the realization flow schematic diagram of the embodiment of the invention 41 to embodiment 43.
Embodiment
Basic thought of the present invention is: the indication of other base stations and/or network is received in the picocell base station, self type is converted to picocell base station under second type or the handover of mobile stations by the first kind, to realize the load balancing of picocell base station.
Here, the described first kind is the picocell base station of complete closed user group, second type is the picocell base station of partially enclosed user's group, and then the picocell base station type is converted to: the picocell base station that is converted to partially enclosed user's group from the picocell base station of complete closed user group.Perhaps, the described first kind is the picocell base station of partially enclosed user's group, second type is the picocell base station of complete closed user group, and then the picocell base station type is converted to: the picocell base station that is converted to complete closed user group from the picocell base station of partially enclosed user's group.Perhaps, the picocell base station of complete closed user group need to allow the mobile radio station of switching to add complete closed user group.
For above-mentioned conversion plan, described indication can be sent by other base stations and/or network; Other base stations can be macro base stations, also can be that open user organizes the picocell base station.Here, other base stations or network can be referred to as the indication transmitting apparatus.
Further, the picocell base station can send to self working state information other base stations or network, can directly send to other base stations, or directly sends to network, or sends to other base stations via network; Other base stations or network also can send to the operating state of other base stations the picocell base station.The job information of picocell base station can carry by medium Access Layer (MAC) message, also can carry by the physical layer control information.
Further, type conversion can realize by the type identification that the described picocell base station physical layer signal of change and/or MAC layer signal are described.Wherein, described physical layer signal comprises synchronizing sequence (sequence), described synchronizing sequence can be included in the lead code (Preamble), and described lead code can be auxilliary lead code (Secondary Preamble) or main lead code (Primary Preamble).
Here, when described type conversion during by the described picocell base station physical layer signal of change, described picocell base station need be prenoticed the described type conversion of subordinate's mobile radio station and is about to take place, after subordinate's mobile radio station receives described notice, synchronous with described picocell base station again after described type conversion takes place according to announcement information.Described announcement information comprises one or more combination of following parameters: the time parameter that type conversion indication, type conversion take place; Described notice can be one or more combination of following manner: multicast, broadcasting, clean culture.Mobile radio station can feed back after receiving described notice, also can not feed back.
The picocell base station can send to other base stations or network with the feedback information of self changing, and can directly send to other base stations, or directly send to network; When sending to network, network can be selected feedback information is notified other base stations or do not notified other base stations.Wherein, feedback information comprises conversion success or not information and/or resource information.
Global microwave access intercommunication (WiMAX, World Interoperability for Microwave Access) is a broadband wireless access metropolitan area network technology based on the IEEE802.16 standard (Broadband WirelessAccess Metropolitan Area Network), the elementary object of WiMAX is to insert under the environment at metropolitan area network, the wireless device of guaranteeing different vendor interconnects, and is mainly used in inserting and personal mobile communication business in the future for family, enterprise and mobile communications network provide the high-speed wideband of last kilometer.The IEEE802.16 standard has been worked out the standard of physical layer (PHY) and MAC layer, is a kind of new air-interface standard that proposes at microwave frequency band.Wherein, the IEEE802.16m that comprises relay structure is present up-to-date standard technique, and IEEE802.16m is based upon on the basis of IEEE802.16e and two standards of IEEE802.16j.
The invention process is in the IEEE802.16m system, and the picocell base station of IEEE802.16m system is when being in enable mode (active mode), as shown in Figure 2, can be between partially enclosed user's group and complete closed user group the conversion work type; As shown in Figure 3, enable mode and battery saving mode all belong to operable state, and wherein, enable mode comprises CSG and OSG, and CSG is divided into partially enclosed user's group and complete closed user group again; Battery saving mode comprises available gap (Available Interval) and non-available gap (UnavailableInterval).
Based on above-mentioned applied environment and basic thought, the present invention relates generally to five kinds of typical implementations, below describes in detail one by one.
First kind of implementation, the picocell base station is converted to CSG-Open according to indication by CSG-closed, realizes in this programme that load balancing may further comprise the steps:
Step 11: the picocell base station of other base stations and/or network indication complete closed user group is converted to the picocell base station of partially enclosed user's group;
Here, described indication sends and/or sends in backhaul network by network eating dishes without rice or wine by other base stations; Described indication is carried in the Downlink Control Information, and is concrete, and described indication is carried in the control information of physical layer; And/or be carried in the administrative messag of MAC layer.
Need to prove: have only a controlling party generally speaking, i.e. other base stations or network; But may have two controlling parties simultaneously under special circumstances, namely other base stations and network for this special circumstances, if mobile radio station is received two identical indications, can be ignored second identical indication.
Described other base stations are the combination of following one or more modes at the send mode of eating dishes without rice or wine: broadcasting, multicast, clean culture.Preferably, when other base station loads were overweight, send mode adopted broadcasting; Soon overweight when other base station loads, send mode adopts multicast or clean culture.
When described send mode was broadcasting, described indication can be included in the physical layer control information, and for instance, this indication can be the cell bar in the 802.16m system for super-frame head (SFH), can also be the particular sequence in the synchronizing channel.
When described message is clean culture or multicast, before receiving described message, other base stations can send load and be about to overweight system information, after the subordinate terminal of other base stations receives described system information, can report the picocell base station of scanning the closed user group that obtains, behind the scan report of other base station receiving terminals, send described message to the base station clean culture of described picocell or multicast.Here, described scanning can be triggered by described system information, namely comprise the indication of scanning closed user group picocell base station in the described system information, and described terminal is received after the described system information beacon scanning or blind the sweeping according to wherein; Described scanning also can be by terminal other broadcast message scannings according to macro base station.
Described send mode is the combination of following one or more modes: when broadcasting, multicast, clean culture, described indication can be the administrative messag of medium access control (MAC) layer, and described message can be broadcasting, multicast or the unicast messages that comprises described indication information.At this moment, system distributes specific resources should for the interacting message of other base stations and picocell base station, for example: time resource and/or frequency resource and/or connection identifier resource; Whether differentiate by specific resources the picocell base station should this message of demodulation.For example, if this message is broadcast, specific temporal frequency resource that system has given this distribution of messages and broadcasting connection identifier, all picocells use described broadcasting connection identifier to receive described message in this temporal frequency resource, just all should demodulation.Again for example, if this message is unicast messages, system has given this distribution of messages specific temporal frequency resource and unicast connection identifier have only the picocell base station of using this unicast connection identifier, just should receive and this message of demodulation in the special time frequency resource.
Describedly be designated as broadcasting or during multicast, receive the picocell base station of the closed user group of described indication can be to other base stations or network send job category conversion request, receive other base stations of described request message or network and send job category conversion request feedback, confirm that described picocell base station can the conversion work type or can not the conversion work type.
Step 12: after the picocell base station of complete closed user group received described indication, changing self type was the picocell base station of partially enclosed user's group.
Here, after the picocell base station of described complete closed user's group is converted to the picocell base station of partially enclosed user's group, sends feedback and be notified to other base stations and/or network.Described picocell base station is notified to other base stations by the feedback of eating dishes without rice or wine, and described notice can be physical layer information, also can be the MAC layer message that comprises described feedback.Described when being fed back to MAC layer message, system distributes specific resources can for the interacting message of other base stations and picocell base station, and described specific resources is: time resource and/or frequency resource and/or connection identifier resource.
Described picocell base station is notified to network by the backhaul network feedback, and network can be notified described other base stations with described feedback by backhaul network.Described feedback comprises one of following message at least: whether described picocell base station finishes the information of conversion; The resource information of described picocell base station; The load information of described picocell.Wherein, described resource information comprises one of following message: used resource information, idling-resource information.
Described being converted to: change the type identification that described picocell base station physical layer and/or MAC layer signal are described; This switching motion can be same action with described broadcast transmission.
Other base stations can be linked into the picocell base station of described partially enclosed user's group according to described feedback information indication subordinate mobile radio station; Other base stations can not have directly to indicate subordinate's mobile radio station to be linked into the picocell base station of described partially enclosed user's group under the situation of described feedback message yet.Wherein, this access can be the switching/reenter of mobile radio station, also can be the initial access of mobile radio station.This access can use prior art to finish, and wherein switches to be initiated by subordinate's mobile radio station, also can be by other base stations initiations, and the switching of other base stations is instructed and is comprised that the described picocell of recommendation base station is the target BS of scanning and/or switching.
The network that the picocell base station of described partially enclosed user's group receives user's switching of non-closed user group reenters, and described user can come from macro base station, also can come from the picocell base station of open user's group.
Second kind of implementation, the picocell base station is converted to CSG-Open according to indication by CSG-closed, and picocell base station transmission self operating state realizes in this programme that to other base stations and/or network load balancing may further comprise the steps:
Step 21: the picocell base station of complete closed user's group sends work state information to other base stations and/or network.
Wherein, described work state information comprises and comprises one of following message at least: whether the resource information of described picocell base station, the load information of described picocell, described picocell can insert new terminal information; Described resource information comprises one of following message: used resource information, idling-resource information.
Described work state information is initiatively sent by described picocell base station; Perhaps, described work state information is sent by other base station work state informations that other base stations of described picocell base station in response and/or network send.The work state information that described other base stations and/or network send comprises one of following message at least: other base station loads are overweight, other base station loads soon overweight, the open user of picocell load of overweight, open user's group to organize the picocell load soon overweight.
Other base stations send work state information can be included in the control information of physical layer control information physical layer, also can be included in the MAC layer message.It is that other users of cell bar set inhibit in the superframe head (SFH) in the 802.16m system insert this residential quarter that the overweight information of described load is included in a embodiment in the control information of physical layer control information physical layer; When described load relevant information was included in the MAC layer message, system distributed specific resources should for the interacting message of other base stations and picocell base station, for example: time resource and/or frequency resource and/or connection identifier resource.Whether differentiate by specific resources the picocell base station should this message of demodulation, and the MAC message mode that comprises described load relevant information can be broadcasting or multicast or clean culture.
Network sends described other base station work state informations by backhaul network.
Described picocell base station sends self working state information to described other base stations by eating dishes without rice or wine, information can be included in the control information of physical layer control information physical layer, also can be included in the MAC layer message.
Informing network is fed back by backhaul network in described picocell base station, and network is notified described other base stations by backhaul network with described feedback.
Step 22: other base stations and/or network based described work state information, the picocell base station of indication complete closed user group is converted to the picocell base station of partially enclosed user's group.
Here, other base stations send described indication and can be included in the Downlink Control Information by eating dishes without rice or wine, concrete, can also can be included in the MAC layer message in the physical layer control information.Be designated as when broadcasting when described, load picocell overweight and/or resource scarcity can be ignored this indication.Be designated as when unicast or multicast when described, receiving unicast or multicast picocell should select according to feedback information, that is: the heavy and/or sufficient picocell of resource of load should preferentially be selected.
Network sends described indication by backhaul network, and load picocell not heavy and/or the resource abundance should preferentially be selected and receive this indication.
Describedly be designated as broadcasting or during multicast, receive the picocell base station of the closed user group of described indication can be to other base stations or network send job category conversion request, receive other base stations of described request message or network and send job category conversion request feedback, confirm that described picocell base station can the conversion work type or can not the conversion work type.
Step 23: after the picocell base station of described partially enclosed user's group receives described indication, be converted to the picocell base station of complete closed user group.
Here, about identical in described indication, feedback information and the restriction of changing and description and the step 12, do not repeat them here.
The third implementation, the picocell base station is converted to CSG-closed according to indication by CSG-Open, realizes in this programme that load balancing may further comprise the steps:
Step 31: the picocell base station of other base stations or network indicating section closed user group is converted to the picocell base station of complete closed user group.
Wherein, described indication sends in backhaul network at eat dishes without rice or wine transmission and/or network by other base stations.Described other base stations are multicast or clean culture at the send mode of eating dishes without rice or wine, and can not be broadcast transmission.
Described indication is carried in the Downlink Control Information, and is concrete, can be carried in the control information of physical layer; Also can be carried on the administrative messag of MAC layer, described message can be multicast or the unicast messages that comprises described indication information.At this moment, system distributes specific resources should for the interacting message of other base stations and picocell base station, for example: time resource and/or frequency resource and/or connection identifier resource.Whether differentiate by specific resources the picocell base station should this message of demodulation.For example: if this message is unicast messages, system has given this distribution of messages specific temporal frequency resource and unicast connection identifier have only the picocell base station of using this unicast connection identifier just should formulate the reception of temporal frequency resource and this message of demodulation.
Step 32: after the picocell base station of partially enclosed user's group receives described indication, be converted to the picocell base station of complete closed user group.
This step further comprises: the terminal of described picocell base station indication subordinate Fei Ben closed user group switches to other base stations, and this switching can use prior art to finish, and wherein, switching can be initiated by subordinate terminal, also can be initiated by private base station.
Here, the picocell base station of described complete closed user's group is converted to the picocell base station of partially enclosed user's group, and the terminal that described conversion occurs in all subordinate Fei Ben closed user group switches to after other base stations.Described conversion comprises: change the type identification that described picocell base station physical layer and/or MAC layer signal are described.
The picocell base station of described complete closed user's group sends feedback and notifies other base stations and/or network.It can be physical layer information that other base stations, described notice are notified by the feedback of eating dishes without rice or wine in described picocell base station, also can be the MAC layer message that comprises described feedback, and this feedback step can realize in same action with described conversion.
Described when being fed back to MAC layer message, system distributes specific resources can for the interacting message of other base stations and picocell base station, for example: time resource and/or frequency resource and/or connection identifier resource.
Informing network is fed back by backhaul network in described picocell base station, and network is notified described other base stations by backhaul network with described feedback.Described feedback comprises one of following message at least: whether described picocell base station finishes the information (for example sign of job category) of conversion, the resource information of described picocell base station, the load information of described picocell.Described resource information comprises one of following message, has used resource information, idling-resource information.
The 4th kind of implementation, the picocell base station is converted into CSG-closed according to indication by CSG-Open, and picocell base station transmission self operating state realizes in this programme that to other base stations and/or network load balancing may further comprise the steps:
Step 41: the picocell base station of complete closed user's group sends work state information to other base stations and/or network.
Wherein, described work state information comprises and comprises one of following message at least: whether the resource information of described picocell base station, the load information of described picocell, described picocell can insert new terminal information.Described resource information comprises one of following message: used resource information, idling-resource information.
Described work state information is initiatively sent by described picocell base station; Perhaps, described work state information is sent by other base station work state informations that other base stations of described picocell base station in response and/or network send.The work state information that described other base stations and/or network send comprises one of following message at least: other base station loads are normal, other base stations can normally be inserted.
Other base stations send work state information can be included in the control information of physical layer control information physical layer, also can be included in the MAC layer message.It is that cell bar set in the superframe head (SFH) in the 802.16m system allows other users to insert this residential quarter that the overweight information of described load is included in a embodiment in the control information of physical layer control information physical layer.When described physical layer control information was included in the MAC layer message, system distributed specific resources should for the interacting message of other base stations and picocell base station, for example: time resource and/or frequency resource and/or connection identifier resource; Whether differentiate by specific resources the picocell base station should this message of demodulation.The MAC message mode that comprises described information can be broadcast or multicast or clean culture.
Network sends described other base station work state informations by backhaul network.
Described picocell base station sends the work state information of oneself to described other base stations by eating dishes without rice or wine, information can be included in the physical layer control information, also can be included in the MAC layer message.Informing network is fed back by backhaul network in described picocell base station, and network is notified described other base stations by backhaul network with described feedback.
Step 42, the picocell base station of other base stations and/or network based described work state information indication complete closed user group is converted to the picocell base station of partially enclosed user's group.
Here, other base stations send described indication and can be included in the Downlink Control Information by eating dishes without rice or wine, concrete, can also can be included in the MAC layer message in the physical layer control information.Be designated as when broadcasting when described, the picocell that load is normal and/or resource is sufficient can be ignored this indication; When being designated as clean culture or multicast, the picocell that receives clean culture or multicast should be selected priority according to feedback information when described, that is: load picocell overweight and/or resource scarcity can be preferred.
Network sends described indication by backhaul network.Load picocell overweight and/or resource scarcity just can be preferred and receive this indication.
Step 43: after the picocell base station of described partially enclosed user's group receives described indication, be converted to the picocell base station of complete closed user group.
Here, about identical in described indication, feedback information and the restriction of changing and description and the step 32, do not repeat them here.
The 5th kind of implementation, OSG and CSG need not conversion, and the mobile radio station that need be switched by the picocell base station control of complete closed user group adds complete closed user group, realizes in this programme that load balancing may further comprise the steps:
Step 51: other base stations and/or network are bristled with anger to the picocell base station and are shown, the mobile station information that needs are switched sends to the picocell base station that the complete closed user organizes.
Step 52: the picocell base station of complete closed user's group adds the mobile radio station classification that can insert with described mobile station information, and feeds back to other base stations and/or network.For example, described mobile radio station is added closed user group and/or corresponding service class is set.
Further, described feedback information comprises whether allowing described mobile radio station to insert and/or described picocell base station resource information, described resource information is for using resource information and/or idling-resource information.
Step 53: other base stations and/or network based feedback send to described mobile radio station with the target picocell base station information of correspondence; For example: but mobile radio station can add described target picocell base station the access base station list of oneself.
Step 54: described mobile radio station inserts described target picocell base station.
Here, described access is for to switch to described target picocell base station with mobile radio station.
Describe in further detail below in conjunction with the realization of the drawings and specific embodiments to the inventive method.
Here, embodiment one to embodiment 20 by macro base station or network as controlling party, at this moment, corresponding scene is the macro base station overload, comprises transshipping or being about to overload, utilizes the picocell of closed user group to carry out load balancing then.Wherein, embodiment one to embodiment ten does not use the picocell base station to up the eating dishes without rice or wine of macro base station, and embodiment 11 to embodiment 20 uses the picocell base station to up the eating dishes without rice or wine of macro base station.
Embodiment one:
Present embodiment is converted to the picocell base station that partially enclosed user organizes from the picocell base station that the complete closed user organizes; Indicated by macro base station; Feedback information sends to network.
As shown in Figure 4, realize in the present embodiment that load balancing may further comprise the steps:
Step 4a: the picocell base station of macro base station indication complete closed user group is converted to the picocell base station of partially enclosed user's group;
Further, in the transmission of eating dishes without rice or wine, overweight when the macro base station load, send mode is broadcasting by macro base station in described indication; Soon overweight when the macro base station load, send mode is multicast or clean culture.
When described send mode is broadcasting, described indication can comprise in the physical layer control information, embodiment is that this indication can be the cell bar in the superframe head (SFH) in the 802.16m system, and another one embodiment is the particular sequence in the synchronizing channel.
When described message is unicast or multicast, before receiving described message, macro base station can send load and be about to overweight system information, the subordinate terminal of macro base station can report the picocell base station of scanning the closed user group that obtains after receiving described system information, sends described message to the base station clean culture of described picocell or multicast behind the scan report of macro base station receiving terminal.Wherein, described scanning can be triggered by described system information, namely comprise the indication of scanning closed user group picocell base station in the described system information, and described terminal is received after the described system information according to described information scanning or blind sweeping; Perhaps, described scanning can be that other broadcast messages here can be the picocell base station informations of the closed user group of summary, for example the picocell base station lead code scope of closed user group by terminal other broadcast message scannings according to macro base station.
Described send mode is the combination of following one or more modes: when broadcasting, multicast, clean culture, described indication can be the administrative messag of MAC layer, and described message can be broadcasting, multicast or the unicast messages that comprises described indication information.At this moment, system distributes specific resources should for the interacting message of macro base station and picocell base station, for example: time resource and/or frequency resource and/or connection identifier resource; Whether differentiate by specific resources the picocell base station should this message of demodulation.For example, if this message is broadcast, specific temporal frequency resource that system has given this distribution of messages and broadcasting connection identifier, all picocells use described broadcasting connection identifier to receive described message in this temporal frequency resource, just all answer demodulation.Again for example, if this message is unicast messages, system has given this distribution of messages specific temporal frequency resource and unicast connection identifier have only the picocell base station of using this unicast connection identifier just should formulate the reception of temporal frequency resource and this message of demodulation.
In addition, when being designated as broadcasting or multicast, the picocell base station that receives the closed user group of described indication can send job category conversion request to macro base station or network, receive the macro base station of described request message or network and send job category conversion request feedback, confirm that described picocell base station can the conversion work type or can not the conversion work type.
Step 4b～4e: after the picocell base station of complete closed user's group receives described indication, be converted to the picocell base station of partially enclosed user's group; Afterwards, transmission feeds back to network; Network is with described feedback notice macro base station; Macro base station indication mobile radio station inserts the picocell base station of partially enclosed user's group of new conversion.
Wherein, for the mobile radio station that has originally inserted the picocell base station, described macro base station indication mobile radio station inserts does handover operation for mobile radio station, switches to the adjacent base station that picocell base station after the translation type or mobile radio station switch to the picocell base station after the translation type; For not inserting the picocell base station before certain mobile radio station as yet, described macro base station indication mobile radio station inserts to mobile radio station and initially inserts the adjacent base station that picocell base station after the translation type or mobile radio station initially insert the picocell base station after the translation type.That is to say that mobile radio station can be to switch or initially insert the picocell base station, be referred to as and insert the picocell base station that following examples are example with the picocell base station that mobile radio station switches to after the translation type all.
Embodiment two:
Present embodiment is converted to the picocell base station that partially enclosed user organizes from the picocell base station that the complete closed user organizes; Indicated by network; Feedback information sends to network.
As shown in Figure 5, realize in the present embodiment that load balancing may further comprise the steps:
Step 5a: the picocell base station of network indication complete closed user group is converted to the picocell base station of partially enclosed user's group.
Step 5b～5e: after the picocell base station of complete closed user's group receives described indication, be converted to the picocell base station of partially enclosed user's group; Afterwards, transmission feeds back to network; Network is with described feedback notice macro base station; Macro base station indication mobile radio station switches to the picocell base station of partially enclosed user's group of new conversion.
Embodiment three:
Present embodiment is converted to the picocell base station that partially enclosed user organizes from the picocell base station that the complete closed user organizes; Indicated by macro base station; Send before the indication, the picocell base station is with self work state information informing network; Feedback information sends to network.
As shown in Figure 6, realize in the present embodiment that load balancing may further comprise the steps:
Step 6a～6b: the picocell base station of complete closed user's group sends self working state information to network, and network is with the work state information notice macro base station of picocell base station;
Here, described work state information can be sent and feeds back in the work state information of macro base station by described picocell base station in response, also can initiatively be sent by the picocell base station.
Step 6c: after macro base station was received the work state information of forwarded, the picocell base station of indication complete closed user group was converted to the picocell base station of partially enclosed user's group.
Step 6d～6g: identical with the handling process of step 4b～4e among the embodiment one.
Embodiment four:
Present embodiment is converted to the picocell base station that partially enclosed user organizes from the picocell base station that the complete closed user organizes; Indicated by macro base station; Send before the indication, the picocell base station is with self work state information informing network; Feedback information sends to network.
As shown in Figure 7, realize in the present embodiment that load balancing may further comprise the steps:
Step 7a～7b: the picocell base station of complete closed user's group sends work state information to network, and network is with the work state information notice macro base station of picocell base station;
Here, described work state information can be sent and feeds back in the work state information of network by described picocell base station in response, also can initiatively be sent by the picocell base station.
Step 7c～7g: identical with the handling process of step 6c～6g among the embodiment three.
Embodiment five:
Present embodiment is converted to the picocell base station that partially enclosed user organizes from the picocell base station that the complete closed user organizes; Indicated by network; Send before the indication, the picocell base station is with self work state information informing network; Feedback information sends to network.
Shown in Fig. 8 (a), realize in the present embodiment that load balancing may further comprise the steps:
Step 8a: the picocell base station of complete closed user's group sends work state information to network;
Here, described work state information can be sent and feeds back in the work state information of network by described picocell base station in response, also can initiatively be sent by the picocell base station.
This step, described work state information also can be sent and feed back in the work state information of macro base station by described picocell base station in response, shown in Fig. 8 (b).
Step 8b～8f: identical with the handling process of step 6c～6g among the embodiment three.
Embodiment six:
Present embodiment is converted to the picocell base station that the complete closed user organizes from the picocell base station that partially enclosed user organizes; Indicated by macro base station; Feedback information sends to network.
As shown in Figure 9, realize in the present embodiment that load balancing may further comprise the steps:
Step 9a: the picocell base station of macro base station indicating section closed user group is converted to the picocell base station of complete closed user group;
Step 9b: the terminal of picocell base station indication subordinate Fei Ben closed user group switches to macro base station;
Step 9c～9e: after the picocell base station of partially enclosed user's group receives described indication, be converted to the picocell base station of complete closed user group; Afterwards, transmission feeds back to network; Network is with described feedback notice macro base station.
Embodiment seven:
Present embodiment is converted to the picocell base station that the complete closed user organizes from the picocell base station that partially enclosed user organizes; Indicated by network; Feedback information sends to network.
As shown in figure 10, realize in the present embodiment that load balancing may further comprise the steps:
Step 10a: the picocell base station of network indicating section closed user group is converted to the picocell base station of complete closed user group;
Step 10b～10e: identical with the handling process of step 9b～9e among the embodiment six.
Embodiment eight:
Present embodiment is converted to the picocell base station that the complete closed user organizes from the picocell base station that partially enclosed user organizes; Indicated by macro base station; Send before the indication, the picocell base station sends to network with self work state information notice macro base station or network feedback information.
Shown in Figure 11 (a), realize in the present embodiment that load balancing may further comprise the steps:
Step 11a: the picocell base station of partially enclosed user's group sends work state information to macro base station;
Here, described work state information can be sent and feeds back in the work state information of macro base station by described picocell base station in response, also can initiatively be sent by the picocell base station.
This step, described work state information also can be sent and feed back in the work state information of network by described picocell base station in response, and network is further with the work state information notice macro base station of picocell base station, shown in Figure 11 (b).
Step 11b～11f: identical with the handling process of step 9a～9e among the embodiment six.
Embodiment nine:
Present embodiment is converted to the picocell base station that the complete closed user organizes from the picocell base station that partially enclosed user organizes; Indicated by macro base station; Send before the indication, the picocell base station sends to network with self work state information informing network feedback information.
As shown in figure 12, realize in the present embodiment that load balancing may further comprise the steps:
Step 12a～12b: the picocell base station of partially enclosed user's group sends work state information to network, and network is with the work state information notice macro base station of picocell base station;
Here, described work state information can be sent and feeds back in the work state information of network by described picocell base station in response, also can initiatively be sent by the picocell base station.
Step 12c～12g: identical with the handling process of step 9a～9e among the embodiment six.
Embodiment ten:
Present embodiment is converted to the picocell base station that the complete closed user organizes from the picocell base station that partially enclosed user organizes; Indicated by network; Send before the indication, the picocell base station sends to network with self work state information informing network feedback information.
As shown in figure 13, realize in the present embodiment that load balancing may further comprise the steps:
Step 13a: the picocell base station of partially enclosed user's group sends work state information to network;
Here, described work state information can be sent and feeds back in the work state information of network by described picocell base station in response, also can initiatively be sent by the picocell base station.
Step 13b～13f: identical with the handling process of step 9a～9e among the embodiment six.
Embodiment 11 to embodiment 19:
Corresponding to the embodiment 9.11 with embodiment one respectively, extremely shown in Figure 22 as Figure 14, handling process, the realization condition basically identical of embodiment 11 to embodiment 19 and embodiment one to embodiment nine, unique difference is: the picocell base station sends to macro base station with feedback information, use the picocell base station to the ascending idle port of macro base station, to accelerate process of feedback.Wherein, after macro base station is received feedback information, can be with the feedback information informing network, also informing network not; Generally, if conversion by network indication, feedback information is answered informing network, if conversion by the macro base station indication, whether feedback information can select informing network.
Embodiment 20:
Corresponding with embodiment ten, as shown in figure 23, handling process, the realization condition basically identical of embodiment 20 and embodiment ten, unique difference is: the work state information of picocell base station sends to macro base station, and by the work state information informing network of macro base station with the picocell base station.
Embodiment 21 to embodiment 40:
Corresponding one by one with embodiment one to embodiment 20 respectively, extremely shown in Figure 43 as Figure 24, embodiment 21 is in full accord with handling process, the realization condition of embodiment one to embodiment 20 to embodiment 40, and unique difference is: replace macro base station among each corresponding embodiment by the picocell base station of open user's group.
That is to say, the picocell base station of the open user's group of embodiment 21 to embodiment 40 uses and network are as controlling party, at this moment, corresponding scene is picocell base station user overload and the macro base station overload of open user's group, therefore, can only utilize the picocell of closed user group to carry out load balancing, specific descriptions do not repeat them here.
Embodiment 41:
Present embodiment adopts the 5th kind of implementation, and other base stations are macro base station, that is to say: controlling party is namely sent out conversion indication side and is macro base station, and as shown in figure 44, concrete handling process and step 51～54 are basic identical.
Embodiment 42:
Present embodiment, adopt the 5th kind of implementation, other base stations are the picocell base station of open user's group, that is to say: controlling party is namely sent out conversion indication side and is the picocell base station of open user's group, as shown in figure 45, concrete handling process and step 51～54 are basic identical.
Embodiment 43:
Present embodiment adopts the 5th kind of implementation, and network is network, that is to say: controlling party is namely sent out conversion indication side for network, and shown in Figure 46 (a), 46 (b), concrete handling process and step 51～54 are basic identical.
For realizing said method, the present invention also proposes a kind of system that realizes load balancing, comprises indication transmitting apparatus, picocell base station and mobile radio station; Wherein,
The indication transmitting apparatus is used to indicate picocell base station translation type, or the mobile station information of notifying the picocell base station to switch;
Here, described indication transmitting apparatus can be picocell base station or the network of macro base station or open user's group; Described translation type is converted to the picocell base station of partially enclosed user's group for the picocell base station from complete closed user group, or is converted to the picocell base station of complete closed user group from the picocell base station of partially enclosed user's group.
The picocell base station is used for receiving indication and adds the mobile radio station classification that can insert according to the mobile radio station of indicating conversion self type, maybe will switch;
Further, the picocell base station also is used for to indication transmitting apparatus feedback information; Also be used to indicate the non-closed user group mobile radio station of subordinate and switch to macro base station;
Mobile radio station is for the picocell base station after the access translation type or its adjacent base station or switching picocell base station.
The above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (16)
1. a method that realizes load balancing is characterized in that, this method comprises: the indication of indication transmitting apparatus is received in the picocell base station, and self type is converted to second type by the first kind;
Wherein, the described first kind is the picocell base station of complete closed user group, and second type is the picocell base station of partially enclosed user's group; Or the described first kind is the picocell base station of partially enclosed user group, and second type is the picocell base station of complete closed user group.
2. method according to claim 1 is characterized in that, after the conversion of picocell base station type, this method also comprises: the picocell base station after the mobile radio station access translation type or mobile radio station insert the adjacent base station of the picocell base station after the translation type.
3. method according to claim 2 is characterized in that, the picocell base station that described mobile radio station inserts after the translation type is: described mobile radio station switches to the picocell base station after the translation type; And/or described mobile radio station initially inserts the picocell base station after the translation type.
4. method according to claim 2 is characterized in that, after the translation type of described picocell base station, this method further comprises: send and feed back to the indication transmitting apparatus.
5. method according to claim 4 is characterized in that, after described indication transmitting apparatus was received feedback information, this method further comprised: with feedback information informing network or other base stations.
6. method according to claim 2 is characterized in that, the picocell base station receives before the indication, and this method also comprises: the picocell base station sends self working state information to the indication transmitting apparatus.
7. method according to claim 6 is characterized in that, the picocell base station sends self working state information to network, and this method also comprises: network is notified other base stations with the work state information of receiving.
8. method according to claim 6 is characterized in that, described picocell base station sends work state information and is: the picocell base station initiatively sends; Or in response to the work state information transmission of indicating transmitting apparatus.
9. according to each described method of claim 1 to 8, it is characterized in that the described type identification that is converted to the described picocell base station physical layer of change and/or media access control layer signal description.
10. according to each described method of claim 1 to 8, it is characterized in that described indication transmitting apparatus is that macro base station or open user organize picocell base station or network.
11., it is characterized in that described indication transmitting apparatus is that macro base station or open user organize the picocell base station according to each described method of claim 1 to 8, described indication sends eating dishes without rice or wine by the base station;
And/or described indication transmitting apparatus is network, and described indication sends in backhaul network by network.
12., it is characterized in that described indication sends by eating dishes without rice or wine according to each described method of claim 1 to 8, send mode is the combination of following one or more modes: broadcasting, multicast, clean culture;
Described indication is carried in the Downlink Control Information, and described indication is carried in the control information of physical layer; And/or be carried in the administrative messag of media access control layer.
13. method according to claim 12 is characterized in that, this method further comprises: system is that the interacting message between the base station distributes specific resources; Described specific resources is time resource and/or frequency resource and/or connection identifier resource.
14., it is characterized in that described feedback information comprises conversion success or not information and/or the resource information of picocell base station and/or the load information of picocell according to claim 4 or 5 described methods; Described resource information is for using resource information and/or idling-resource information.
15. a system that realizes load balancing is characterized in that, this system comprises indication transmitting apparatus, picocell base station and mobile radio station; Wherein,
The indication transmitting apparatus is used to indicate picocell base station translation type;
The picocell base station is used for receiving indication and changes self type;
Wherein, described conversion self type is converted to the picocell base station of partially enclosed user's group for the picocell base station from complete closed user group, or is converted to the picocell base station of complete closed user group from the picocell base station of partially enclosed user's group;
Mobile radio station is for picocell base station or its adjacent base station after the access translation type.
16. system according to claim 15 is characterized in that, described indication transmitting apparatus is picocell base station or the network of macro base station or open user's group.
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| PCT/CN2010/074093 WO2010145564A1 (en) | 2009-06-30 | 2010-06-18 | Method and system for changing base station type |
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| CN102685782A (en) * | 2011-03-14 | 2012-09-19 | 中国移动通信集团公司 | Distributed type base station system and load balancing method thereof |
| CN104113881B (en) * | 2013-04-16 | 2019-09-17 | 中兴通讯股份有限公司 | A kind of radio resource management method, macro base station and low power nodes |
| WO2014180005A1 (en) * | 2013-05-10 | 2014-11-13 | 富士通株式会社 | Information configuration method, information sending method, and data transceiving control method and device thereof |
| CN104519527B (en) * | 2013-09-29 | 2019-05-17 | 索尼公司 | Device and method and base station for the load balancing in wireless communication system |
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| CN101400160A (en) * | 2007-09-29 | 2009-04-01 | 北京三星通信技术研究有限公司 | Method for establishing connection by HNB |
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| US7567791B2 (en) * | 2005-09-19 | 2009-07-28 | Qualcomm Incorporated | Wireless terminal methods and apparatus for use in a wireless communications system that uses a multi-mode base station |
| CN101310551A (en) * | 2005-10-04 | 2008-11-19 | 艾利森电话股份有限公司 | Access control in radio access network having pico base stations |
| EP2149272A4 (en) * | 2007-04-28 | 2010-07-28 | Huawei Tech Co Ltd | Method and system for interference reduction through proximity based transmission mode change |
| CN101404814B (en) * | 2007-10-05 | 2015-07-01 | 美商威睿电通公司 | Automatic provisioning of admission policy for femtocell |
| US20090156208A1 (en) * | 2007-11-26 | 2009-06-18 | Nokia Siemens Networks Oy | Local network access using public cells |
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