CN101272588A - Alien system switching or re-selection - Google Patents
Alien system switching or re-selection Download PDFInfo
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- CN101272588A CN101272588A CNA2007100381910A CN200710038191A CN101272588A CN 101272588 A CN101272588 A CN 101272588A CN A2007100381910 A CNA2007100381910 A CN A2007100381910A CN 200710038191 A CN200710038191 A CN 200710038191A CN 101272588 A CN101272588 A CN 101272588A
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Abstract
The invention relates to a wireless communication field and discloses switching or re-selection of different systems to result in more balanced load between different systems. In the invention, an RAN node in a first system obtains load information of a cell in a second system adjacent to a subordinate cell of the node; the RAN node of the first system assists a terminal inside the subordinate cell of the node to carry out the switching or re-selection of the cell in the second system according to the obtained load information. The RAN node of the first system can require the load information periodically or when switching or judgment needs to be carried out, and an RAN node or a network management system of the second system can also send out the load information actively and periodically or when triggered by an event.
Description
Technical field
The present invention relates to wireless communication field, particularly the switching of terminal and cell reselection technique.
Background technology
Along with being the high-tech development of sign with the communication technology and computer technology, the great variety of making rapid progress has taken place in people's life, and the development of cellular mobile communication brings great convenience to the user, and the three generations has been experienced in its development at present.
In all cellular mobile communication technologies, when terminal is left a sub-district and is entered the another one sub-district, the signal of the original sub-district that this terminal is received inevitable more and more a little less than, and its received signal that enters the sub-district will be more and more stronger just also.Therefore, terminal need switch or the sub-district gravity treatment to the sub-district that newly enters.
If this terminal is in connection status, then in order to keep the communication quality of this terminal, the connection of this terminal must be switched to the stronger base station of signal that newly enters from original base station, specifically, network side is carried at the adjacent cell list of this terminal to measure in the control messages and is handed down to this terminal, and this terminal is initiated to measure to each adjacent area in this tabulation, and reporting measurement reports, carry out switch decision by network side, select a better quality of signal sub-district to switch.
If this terminal is in idle condition, then network side is carried at the adjacent cell list of this terminal and is handed down to this terminal in the system message, this terminal is initiated to measure to each adjacent area in this tabulation, and according to better quality of signal sub-district of measurement result gravity treatment, request is linked into the sub-district after the gravity treatment.
For the network side that only comprises a system, only comprise the neighbor cell that belongs to this system in the above-mentioned adjacent cell list, yet development along with mobile communications network, more and more different systems have appearred, enhancing data wireless access network (GSM EDGE RadioAccess Network as global system for mobile communications and evolution thereof, be called for short " GERAN "), universal mobile telecommunications system (Universal MobileTelecommunications System, be called for short " UMTS "), Long Term Evolution (Long Term Evolution, be called for short " LTE ") system etc., GERAN will appear future possibly, the scene of multisystem such as UMTS and LTE coexistence, terminal need be switched between the sub-district of different system or the sub-district gravity treatment belonging to, at this moment, can comprise the neighbor cell that belongs to different system in the adjacent cell list that network side issues.Terminal is carried out cell measurement according to adjacent cell list equally when needs switching or sub-district gravity treatment, select a better quality of signal sub-district to switch or the sub-district gravity treatment, and this sub-district can be the homologous ray sub-district, also can be different system cell.
Yet, the present inventor finds, because the load between the different system is different, though the cell signal quality of the system that has is better, but load is bigger, is to be not suitable for continuing to hold switching or the terminal of sub-district gravity treatment for the sub-district of this system, because probably because the switching or the sub-district gravity treatment of terminal, make the bigger system of load surpass its load ability to bear, influence the quality of service of original terminal in this system.Therefore, the present inventor thinks, terminal is carried out the sub-district gravity treatment between the system and need be considered the loading condition of each system when switching, thereby carries out more rational switching and sub-district gravity treatment.Yet, because switching and sub-district gravity treatment mainly are at wireless access network (Radio Access Network, abbreviation " RAN ") side is carried out, as carrying out in base station side, the mutual of load information can not be carried out in the prior art between the access network equipment of different system, thereby the switching and the sub-district gravity treatment of terminal can't be carried out in conjunction with loading condition.
Summary of the invention
The technical problem underlying that embodiment of the present invention will solve provides a kind of different system to be switched or gravity treatment, makes that load is more balanced between different system.
For solving the problems of the technologies described above, embodiments of the present invention provide a kind of different system to switch or reselecting method, comprise following steps:
The wireless access network node of first system obtains the load information of the sub-district in second system adjacent with this node subordinate sub-district;
The wireless access network node of first system assists terminal in this node subordinate sub-district to relate to the switching or the gravity treatment of sub-district in second system according to the load information that is obtained.
Embodiments of the present invention also provide a kind of wireless access network node, and this wireless access network node belongs to first system, and the wireless access network node of first system comprises:
Information acquisition unit is used for obtaining the load information of the second system sub-district adjacent with this node subordinate sub-district;
Switch or the gravity treatment unit, be used for assisting terminal in this node subordinate sub-district, relate to the switching or the gravity treatment of sub-district in second system according to the load information that is obtained.
Embodiments of the present invention also provide a kind of network equipment, and this network equipment belongs to second system, and this network equipment comprises:
Load information provides the unit, is used for sending to the wireless access network node of first system load information of the second system sub-district, and the wireless access network node subordinate's of this sub-district and this first system sub-district is adjacent.
Embodiments of the present invention also provide a kind of different system to switch or the gravity treatment system, comprise first system and second system, and first system comprises at least one wireless access network node mentioned above, and second system comprises at least one network equipment mentioned above.
Embodiment of the present invention compared with prior art, the main distinction and effect thereof are:
The RAN node of first system obtains the load information of sub-district in second system adjacent with this node subordinate sub-district; The RAN node of first system assists terminal in this node subordinate sub-district to relate to the switching or the gravity treatment of sub-district in second system according to the load information that is obtained.When thereby the load that can avoid sub-district in second system is big, terminal in the sub-district of first system still switch or gravity treatment to the situation of the sub-district of this second system, prevent to cause the imbalance of two loads between the system, thereby after having avoided switching or gravity treatment, the service quality of the terminal in this second system reduces, and the load resource in first system wastes.By cell load is considered switch or the condition of gravity treatment in, the load between can the sub-district of balance different system improves the utilance of the load resource of each system, the quality of service for terminal provides guarantee indirectly.
Description of drawings
Fig. 1 switches or the reselecting method flow chart according to the different system of first embodiment of the invention;
Fig. 2 switches or the reselecting method flow chart according to the different system of second embodiment of the invention;
Fig. 3 switches or the reselecting method flow chart according to the different system of third embodiment of the invention;
Fig. 4 switches or the reselecting method flow chart according to the different system of four embodiment of the invention;
Fig. 5 switches or the reselecting method flow chart according to the different system of fifth embodiment of the invention;
Fig. 6 switches or the reselecting method flow chart according to the different system of seventh embodiment of the invention;
Fig. 7 switches or the reselecting method flow chart according to the different system of ninth embodiment of the invention;
Fig. 8 switches or the reselecting method flow chart according to the different system of eleventh embodiment of the invention;
Fig. 9 switches or the gravity treatment system construction drawing according to the different system of thirteenth embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, embodiments of the present invention are described in further detail below in conjunction with accompanying drawing.
First embodiment of the invention relates to a kind of different system and switches or reselecting method.The network side of present embodiment comprises two systems (system 1 and system 2), there is sub-district 1 (CELL1) wireless access network node 1 (RAN1) subordinate's of system 1 sub-district, there is sub-district 2 (CELL2) wireless access network node 2 (RAN2) subordinate's of system 2 sub-district, core net (the Core Net of RAN1 and system 1 wherein, be called for short " CN ") node CN1 connection, the core net node CN2 of RAN2 and system 2 is connected.
Judge the loading condition of this sub-district in the present embodiment by the RAN under the sub-district, set load-threshold, RAN at this cell load different system cell that its load information notice is adjacent with this sub-district during greater than first load-threshold, indicate this sub-district no longer to allow terminal to insert, equally its load information is notified the RAN of this different system cell during less than second thresholding at this cell load, indicated this sub-district to allow terminal to insert again.In the present embodiment, the RAN under this sub-district by its connection core net and the core net of adjacent different system carry out information interaction, the load information of this sub-district is transferred to the RAN of adjacent different system cell by the core net of different system.Specifically as shown in Figure 1.
In step 110, whether the load of the CELL1 that RAN1 judges is greater than first thresholding or less than second thresholding, and this first thresholding and second thresholding can be concrete values, also can be ratios, and concrete threshold value can be formulated flexibly by operator.As this first thresholding be the CELL1 maximum can bear load 80%, this second thresholding be the CELL1 maximum can bear load 60%, if present load is greater than first thresholding (80%) or less than second thresholding (60%), then RAN1 need notify this load information of RAN2 under the different system cell CELL2 adjacent with CELL1, guarantee that terminal among the CELL2 no longer inserts CELL1 during load too high (greater than first thresholding) in CELL1, insert during less than second thresholding in load.In this step, the core net (CN1) of this RAN1 under it sends load information Indication message Target cell info Indication, load information and other information that needs of carrying CELL1 in this Indication message.Here other information that need can comprise the bandwidth of CELL1, geographical location information etc.CN1 can also carry the sign of Target cell CELL2 in this Indication message, so that can correctly send to this Indication message the affiliated RAN of Target cell indirectly.
Then enter step 120, CN1 is according to the sign of CELL2, and the core net (CN2) of the system 2 under CELL2 sends this Indication message.
Then enter step 130, after CN2 received this Indication message, according to the sign of CELL2 wherein, the RAN2 under CELL2 sent this Indication message.After RAN2 receives this Indication message, from this Indication message, obtain load information and other information that needs of CELL1, preserve the load information of the CELL1 that is obtained.
In step 140, RAN2 issues load information and other information that needs of this CELL1 in CELL2 with the form of broadcasting, the terminal of Idle state is carried out the sub-district gravity treatment according to this load information in the indication CELL2, promptly, if this load information shows load too high (greater than first thresholding) among the CELL1 terminal no longer the sub-district gravity treatment to CELL1, if this load information shows that load is less than second thresholding among the CELL 1, then terminal can gravity treatment arrive CELL1 when needed.By considering load information when the gravity treatment of sub-district, can effectively prevent the imbalance of load between two systems, avoid too much terminal sub-district gravity treatment to make the service quality of the terminal in the system 1 reduce, and the load resource in the system 2 waste to CELL1.
In step 150, during the terminal to report measurement report of RAN2 in CELL2, carry out switch decision according to the CELL1 load information of being preserved, if this load information shows that the load of CELL1 is greater than first thresholding, judge that then this terminal can not switch to CELL1, if this load information shows the load of CELL1 and less than second thresholding, judges that then this terminal can switch to CELL1, notifies this terminal to switch.
In step 160, RAN2 returns load information response message Target cell infoResp to CN2, and notice CN2 has received this load information.
Then enter step 170, CN2 returns the load information response message to CN1.
Then enter step 180, return the load information response message to RAN1, inform that RAN1 RAN2 this moment has received this load information by CN1.
Wherein do not have fixing precedence relationship between the step 140,150 and 160, step 160,170 and 180 can be used as optional step, when network transmission resource is nervous, can not return response message.
Said in the present embodiment load information can comprise: the value of the parameter of measurement cell load and/or the grade of load of parameter value correspondence.As cell load being divided into 1 to 10 the grade of load, this first thresholding is that grade 8, the second thresholdings are class 6, that is to say that grade thinks overload more than 8, do not allow the terminal of other system to insert, think normal below the class 6, allow the terminal of other system to insert.In addition, in different system, the parameter of weighing cell load also can be different, and as in the GERAN system, the parameter of weighing cell load comprises base station transmitting power, number of users etc.; In the UMTS system, the parameter of weighing cell load comprises: terminal average transmit power, number of users etc.; In the LTE system, the parameter of weighing cell load comprises: average throughput, number of users etc.Use very flexibly, can satisfy the demand of different system.
In addition, in the present embodiment, RAN2 also can send the load information of CELL2 to RAN1 by identical setting and mode, the switching and the sub-district gravity treatment of terminal in the control CELL1, thus make the load of different system can be able to balance and make full use of.
Second embodiment of the invention relates to a kind of different system equally and switches or reselecting method, roughly the same with first execution mode, its difference is, in the first embodiment, RAN1 is in the load of CELL1 during greater than first thresholding or less than second thresholding, send Indication message to RAN2, the load information of this CELL1 of notice RAN2; And in the present embodiment, periodically timer is set in RAN1 in advance, when the periodicity timer expiry, this RAN1 sends Indication message to RAN2, notify the load information of this this CELL1 of RAN2, as shown in Figure 2, thereby make this RAN2 can obtain the load information of CELL1 in real time, make things convenient for the switching and the sub-district gravity treatment of terminal in the CELL2.The sending method of load information is identical with first execution mode, does not repeat them here.
Equally, in the present embodiment, RAN2 also can send the load information of CELL2 to RAN1 by identical setting and mode, the switching and the sub-district gravity treatment of terminal in the control CELL1, thus make the load of different system can be able to balance and make full use of.
Third embodiment of the invention relates to a kind of different system equally and switches or reselecting method.The network configuration of present embodiment is identical with first execution mode, in the present embodiment, periodically timer is set in RAN2, RAN2 is when each timer expiry, send the load information request to RAN1, RAN1 returns the load information of CELL1 to RAN2 after receiving this load information request.The concrete time limit of timer can be formulated as required flexibly by operator, as is 10 seconds etc.In the present embodiment, this RAN1 carries out information interaction by the CN1 of its connection and the CN2 of system 2 equally, by CN2 the load information of CELL1 is transferred to RAN2.
As shown in Figure 3, in step 310, the periodicity timer expiry of RAN2, RAN2 sends the load information request Target cell info Request of the adjacent sub-district CELL1 of different system to CN2, and request obtains load information and other information that needs of CELL1.
In step 320, the core net (CN1) of the system 1 of CN2 under CELL1 sends this load information request.
Then enter step 330, the RAN1 of CN1 under CELL1 sends this load information request.
Then enter step 340, RAN1 returns load information response message Target cell infoResp to CN1, and the load information of CELL1 and the information of other needs are carried in this message.
Then enter step 350, CN1 returns response message to CN2, and the load information of CELL1 and the information of other needs are carried in this message.
Then enter step 360, CN2 returns response message to RAN2, and the load information of CELL1 and the information of other needs are carried in this message.After RAN2 receives this response message, obtain wherein load information and other information that needs of CELL1, load information and other information that needs of preserving the CELL1 that is obtained.
In step 370, RAN2 can issue load information and other information that needs of this CELL1 with the form of broadcasting in CELL2, and the terminal of Idle state is carried out the sub-district gravity treatment according to this load information in the indication CELL2.
In step 380, RAN2 during the terminal to report measurement report, carries out switch decision according to the CELL1 load information of being preserved in CELL2.
In addition, in the present embodiment, RAN1 also can obtain the load information of CELL2 from RAN2 by identical setting and mode, the switching and the sub-district gravity treatment of terminal in the control CELL1, thus make the load of different system can be able to balance and make full use of.
Four embodiment of the invention relates to a kind of different system equally to be switched or reselecting method, and roughly the same with the 3rd execution mode, its difference is, in the 3rd execution mode, at RAN2 periodically timer is set, when timer expiry, RAN2 sends the load information request to RAN1; And in the present embodiment, when terminal is carried out switch decision in RAN2 need be to CELL2, send the load information request to RAN1, as shown in Figure 4.The method of specifically obtaining load information is identical with the 3rd execution mode, does not repeat them here.
After RAN2 obtains CELL1 load information and other information that needs, according to these information is that terminal is carried out switch decision, if the load information of CELL1 shows that the CELL1 present load is less, judge that then this terminal can switch to CELL1, and notify this terminal to switch accordingly.In addition, RAN2 can be handed down to terminal among the CELL2 with the form of broadcasting with the load information of CELL1 and other information that needs equally, makes the terminal of Idle state to carry out the sub-district gravity treatment according to these information.By switching and consideration load information during the gravity treatment of sub-district, can effectively prevent the imbalance of load between two systems, avoid too much terminal to switch or the sub-district gravity treatment makes the service quality of the terminal in the system 1 reduce to CELL1, and the load resource in the system 2 waste.
Equally, in the present embodiment, RAN1 also can obtain the load information of CELL2 from RAN2 by identical setting and mode, the switching and the sub-district gravity treatment of terminal in the control CELL1, thus make the load of different system can be able to balance and make full use of.
Fifth embodiment of the invention relates to a kind of different system equally and switches or reselecting method, present embodiment is different with preceding several embodiments, in preceding several embodiments, the load information of CELL1 is directly provided by RAN1, RAN1 by its connection CN1 and the CN2 of adjacent system 2 carry out information interaction, by CN2 the load information of CELL1 is transferred to RAN2; And in the present embodiment, Element management system (the Element Management System that the load information of CELL1 is connected by RAN1, be called for short " EMS ") 1 provide, EMS1 carries out information interaction by the EMS2 with system 2, and the load information of CELL1 is transferred to RAN2.
Specifically, in the present embodiment, in the RAN1 of system 1 CELL1 is arranged, in the RAN2 of system 2 CELL2 is arranged, RAN1 is by management node EMS1 management, and RAN2 can interactive information between EMS1 and the EMS2 by management node EMS2 management.
Owing to do not have direct communication interface between the RAN of different system, but can interactive information between the EMS of RAN and homologous ray, and preserve the load information of the sub-district of management to some extent among the EMS, so RAN2 can obtain the load information of CELL1 by the interface between the EMS of two systems from the EMS1 of system 1.The load information of relevant CELL1 can be regularly to be reported by RAN1 among the EMS1, or EMS1 initiatively asks to RAN1.
In the present embodiment, EMS1 during greater than first thresholding or less than second thresholding, initiatively sends the EMS2 of the load information of CELL1 to neighbor cell CELL2 in the load of CELL1, by EMS2 the load information of CELL1 is sent to RAN2 under the CELL2.Wherein, the value of concrete the one the second thresholdings can be formulated as required flexibly by operator.
Specifically as shown in Figure 5, in step 510, EMS1 monitors the load of CELL1 greater than first thresholding or less than second thresholding, the EMS2 of EMS1 under CELL2 sends load information Indication message Target cell info Indication, comprises the information of load information and other needs of CELL1 in this message.
Then enter step 520, the RAN2 of EMS2 under CELL2 sends this load information Indication message, comprises the information of load information and other needs of CELL1 in this message.After RAN2 receives this Indication message, from this Indication message, obtain the load information of CELL1 and other information that needs and preserve.
In step 530, RAN2 issues load information and other information that needs of this CELL1 in CELL2 with the form of broadcasting, the terminal of Idle state is carried out the sub-district gravity treatment according to this load information in the indication CELL2, promptly, if this load information shows load too high (greater than first thresholding) among the CELL1 terminal no longer the sub-district gravity treatment to CELL1, if this load information shows that load is less than second thresholding among the CELL1, then terminal can gravity treatment arrive CELL1 when needed.By considering load information when the gravity treatment of sub-district, can effectively prevent the imbalance of load between two systems, avoid too much terminal sub-district gravity treatment to make the service quality of the terminal in the system 1 reduce, and the load resource in the system 2 waste to CELL1.
In step 540, RAN2 is in CELL2 during the terminal to report measurement report, load information according to the CELL1 that is preserved carries out switch decision, if this load information shows that the load of CELL1 is greater than first thresholding, judge that then this terminal can not switch to CELL1, if this load information shows the load of CELL1 and less than second thresholding, judges that then this terminal can switch to CELL1, notifies this terminal to switch.
In step 550, RAN2 returns load information response message Target cell infoResp to EMS2, and notice EMS2 has received this load information.
Then enter step 560, EMS2 returns the load information response message to EMS1.
Wherein do not have fixing precedence relationship between the step 530,540 and 550, RAN2 also may receive the measurement report of terminal to report earlier, is switched and determined according to the load information of CELL1.Step 550 and 560 can be used as optional step, when network transmission resource is nervous, can not return response message.
In addition, in the present embodiment, EMS2 also can send the load information of CELL2 to RAN1 by identical setting and mode, the switching and the sub-district gravity treatment of terminal in the control CELL1, thus make the load of different system can be able to balance and make full use of.
Sixth embodiment of the invention relates to a kind of different system equally and switches or reselecting method, roughly the same with the 5th execution mode, its difference is, in the 5th execution mode, EMS1 is in the load of CELL1 during greater than first thresholding or less than second thresholding, send Indication message to RAN2, the load information of this CELL1 of notice RAN2; And in the present embodiment, at EMS1 periodically timer is set in advance, when the periodicity timer expiry, this EMS1 sends Indication message to RAN2, notify the load information of this this CELL1 of RAN2, thereby make this RAN2 can obtain the load information of CELL1 in real time, make things convenient for the switching and the sub-district gravity treatment of terminal in the CELL2.The sending method of load information is identical with the 5th execution mode, does not repeat them here.
Equally, in the present embodiment, EMS2 also can send the load information of CELL2 to RAN1 by identical setting and mode, the switching and the sub-district gravity treatment of terminal in the control CELL1, thus make the load of different system can be able to balance and make full use of.
Seventh embodiment of the invention relates to a kind of different system equally and switches or reselecting method, the network configuration of present embodiment is identical with the 5th execution mode, in the present embodiment, periodically timer is set in RAN2, RAN2 is when each timer expiry, send the load information request to EMS 1, RAN1 returns the load information of CELL1 to RAN2 after receiving this load information request.The concrete time limit of timer is provided with and can be formulated flexibly as required by operator, as is 10 seconds etc.In the present embodiment, EMS1 equally the interface by EMS1 and EMS2 the load information of CELL1 is transferred to RAN2.
As shown in Figure 6, in step 610, the periodicity timer expiry of RAN2, RAN2 sends the load information request Target cell info Request of the adjacent sub-district CELL1 of different system to EMS2, and request obtains load information and other information that needs of CELL1.
In step 620, the management node EMS1 of the RAN1 of EMS2 under CELL1 sends this load information request.
In step 630, EMS 1 returns response message Target cell info Resp to EMS2, and the load information of CELL1 and the information of other needs are carried in this message.
In step 640, EMS2 returns response message to RAN2, and the load information of CELL1 and the information of other needs are carried in this message.After RAN2 receives this response message, obtain load information and other information that needs of CELL1 wherein and preserve.
In step 650, RAN2 can issue load information and other information that needs of this CELL1 with the form of broadcasting in CELL2, and the terminal of Idle state is carried out the sub-district gravity treatment according to this load information in the indication CELL2.
In step 660, during the terminal to report measurement report of RAN2 in CELL2, carry out switch decision according to the CELL1 load information of being preserved.
In addition, in the present embodiment, RAN1 also can obtain the load information of CELL2 from EMS2 by identical setting and mode, the switching and the sub-district gravity treatment of terminal in the control CELL1, thus make the load of different system can be able to balance and make full use of.
By consider load information in the sub-district gravity treatment with when switching, can effectively prevent the imbalance of load between two systems, avoid too much terminal sub-district gravity treatment or switch to CELL1 making the service quality of the terminal in the system 1 reduce, and the load resource in the system 2 wastes.
Eighth embodiment of the invention relates to a kind of different system equally to be switched or reselecting method, and roughly the same with the 7th execution mode, its difference is, in the 7th execution mode, periodically timer is set in RAN2, and when timer expiry, RAN2 sends the load information request to EMS1; And in the present embodiment, when RAN2 need carry out switch decision to the terminal in the CELL2, send the load information request to EMS1.The method of specifically obtaining load information is identical with the 7th execution mode, does not repeat them here.After RAN2 gets access to the load information and other information that needs of CELL1, according to these information is that terminal is carried out switch decision, if the load information of CELL1 shows that the CELL1 present load is less, judge that then this terminal can switch to CELL1, and notify this terminal to switch accordingly.In addition, RAN2 can be handed down to terminal among the CELL2 with the form of broadcasting with the load information of the CELL1 that gets access to and other information that needs equally, makes the terminal of Idle state to carry out the sub-district gravity treatment according to these information.By switching and consideration load information during the gravity treatment of sub-district, can effectively prevent the imbalance of load between two systems, avoid too much terminal to switch or the sub-district gravity treatment makes the service quality of the terminal in the system 1 reduce to CELL1, and the load resource in the system 2 waste.
Equally, in the present embodiment, RAN1 also can obtain the load information of CELL2 from EMS2 by identical setting and mode, the switching and the sub-district gravity treatment of terminal in the control CELL1, thus make the load of different system can be able to balance and make full use of.
EMS1 in fifth embodiment of the invention to the eight execution modes and EMS2 can be two independently physical equipments, also can be included in two unit in logic in the shared Network Management Equipment.
Ninth embodiment of the invention relates to a kind of different system equally and switches or reselecting method, in the present embodiment, the direct interface of definition between the RAN of different system, when RAN need obtain with its linchpin under during the load information of the adjacent different system cell in sub-district, can obtain the load information of this different system cell by this interface from the RAN under this adjacent different system cell.
In the present embodiment, comprise two systems (system 1 and system 2), in the RAN1 of system 1 CELL1 is arranged, in the RAN2 of system 2 CELL2 is arranged.Defined direct interface between RAN1 and the RAN2, can interactive information.
RAN1 is at the RAN2 of the load of the CELL1 different system cell CELL2 that its load information notice is adjacent with this sub-district during greater than first load-threshold, indication CELL1 no longer allows the terminal in the CELL2 to insert, notify this RAN2 with its load information in the load of CELL1 equally during less than second thresholding, indication CELL1 allows the terminal of CELL2 to insert again.Specifically as shown in Figure 7.
In step 710, whether the load of the CELL1 that RAN1 judges is greater than first thresholding or less than second thresholding, and this first thresholding and second thresholding can be concrete values, also can be ratios, and concrete threshold value can be formulated flexibly by operator.As this first thresholding be the CELL1 maximum can bear load 80%, this second thresholding be the CELL1 maximum can bear load 60%, if present load is greater than first thresholding (80%) or less than second thresholding (60%), then RAN1 by and RAN2 between interface send the load information Indication message Target cell infoIndication of CELL1, load information and other information that needs of in this Indication message, carrying CELL1 to RAN2.After RAN2 receives this Indication message, therefrom obtain the load information of CELL1 and other information that needs and preserve.
In step 720, RAN2 issues load information and other information that needs of this CELL1 in CELL2 with the form of broadcasting, the terminal of Idle state is carried out the sub-district gravity treatment according to this load information in the indication CELL2, promptly, if this load information shows load too high (greater than first thresholding) among the CELL1 terminal no longer the sub-district gravity treatment to CELL1, if this load information shows that load is less than second thresholding among the CELL1, then terminal can gravity treatment arrive CELL1 when needed.
In step 730, during the terminal to report measurement report of RAN2 in CELL2, carry out switch decision according to the CELL1 load information of being preserved, if this load information shows that the load of CELL1 is greater than first thresholding, judge that then this terminal can not switch to CELL1, if this load information shows the load of CELL1 and less than second thresholding, judges that then this terminal can switch to CELL1, notifies this terminal to switch.
By consider load information in the gravity treatment of the sub-district of terminal with when switching, can effectively prevent the imbalance of load between two systems, avoid too much terminal sub-district gravity treatment or switch to CELL1 making the service quality of the terminal in the system 1 reduce, and the load resource in the system 2 wastes.
In step 740, RAN2 returns load information response message Target cell infoResp to RAN1.
In the present embodiment, step 720,730,740 is independent separately, does not have relative precedence relationship, under the situation that transfer resource lacks, can also omit step 740, and promptly RAN2 does not return the load information response message to RAN1 after receiving load information.
In addition, in the present embodiment, RAN2 also can send the load information of CELL2 to RAN1 by identical setting and mode, the switching and the sub-district gravity treatment of terminal in the control CELL1, thus make the load of different system can be able to balance and make full use of.
Tenth embodiment of the invention relates to a kind of different system equally and switches or reselecting method, roughly the same with the 9th execution mode, its difference is, in the 9th execution mode, RAN1 is in the load of CELL1 during greater than first thresholding or less than second thresholding, send the load information Indication message to RAN2, the load information of this CELL1 of notice RAN2; And in the present embodiment, at RAN1 periodically timer is set in advance, when the periodicity timer expiry, this RAN1 sends the load information Indication message to RAN2, notify the load information of this this CELL1 of RAN2, thereby make this RAN2 can obtain the load information of CELL1 in real time, make things convenient for the switching and the sub-district gravity treatment of terminal in the CELL2.The sending method of load information is identical with the 9th execution mode, does not repeat them here.
Equally, in the present embodiment, RAN2 also can send the load information of CELL2 to RAN1 by identical setting and mode, the switching and the sub-district gravity treatment of terminal in the control CELL1, thus make the load of different system can be able to balance and make full use of.
Eleventh embodiment of the invention relates to a kind of different system equally and switches or reselecting method.The network configuration of present embodiment is identical with the 9th execution mode, in the present embodiment, at RAN2 periodically timer is set, RAN2 is when each timer expiry, send the load information request to RAN1, RAN1 returns the load information of CELL1 to RAN2 after receiving this load information request.The concrete time limit of timer is provided with and can be formulated flexibly as required by operator, as is 10 seconds etc.In the present embodiment, define a direct interface equally between this RAN1 and RAN2, RAN2 sends the load information request by this interface to RAN1, and RAN1 returns corresponding load information by this interface to RAN2.
Specifically as shown in Figure 8, in step 810, the periodicity timer expiry of RAN2, RAN2 by and RAN1 between interface send load information request Target cell info Request to RAN1, request obtains load information and other information that needs of CELL1.
Then enter step 820, after RAN1 receives this request, return response message Target cell info Resp to RAN2, the load information of CELL1 and the information of other needs are carried in this message by this interface.After RAN2 receives this response message, obtain load information and other information that needs of CELL1 wherein and preserve.
In step 830, RAN2 can issue load information and other information that needs of this CELL1 with the form of broadcasting in CELL2, and the terminal of Idle state is carried out the sub-district gravity treatment according to this load information in the indication CELL2.
In step 840, during the terminal to report measurement report of RAN2 in CELL2, carry out switch decision according to the CELL1 load information of being preserved.
By consider load information in the sub-district gravity treatment with when switching, can effectively prevent the imbalance of load between two systems, avoid too much terminal sub-district gravity treatment or switch to CELL1 making the service quality of the terminal in the system 1 reduce, and the load resource in the system 2 wastes.
In addition, in the present embodiment, RAN1 also can obtain the load information of CELL2 from RAN2 by identical setting and mode, the switching and the sub-district gravity treatment of terminal in the control CELL1, thus make the load of different system can be able to balance and make full use of.
Twelveth embodiment of the invention relates to a kind of different system equally to be switched or reselecting method, and roughly the same with the 11 execution mode, its difference is, in the 11 execution mode, at RAN2 periodically timer is set, when timer expiry, RAN2 sends the load information request to RAN1; And in the present embodiment, when RAN2 need carry out switch decision to the terminal in the CELL2, send the load information request to RAN1.In the present embodiment, define a direct interface equally between this RAN1 and RAN2, RAN2 sends the load information request by this interface to RAN1 equally, and RAN1 returns corresponding load information by this interface to RAN2 equally.
After RAN2 obtains CELL1 load information and other information that needs, according to these information is that terminal is carried out switch decision, if the load information of CELL1 shows that the CELL1 present load is less, judge that then this terminal can switch to CELL1, and notify this terminal to switch accordingly.In addition, RAN2 can be handed down to terminal among the CELL2 with the form of broadcasting with the load information of CELL1 and other information that needs equally, makes the terminal of Idle state to carry out the sub-district gravity treatment according to these information.By switching and consideration load information during the gravity treatment of sub-district, can effectively prevent the imbalance of load between two systems, avoid too much terminal to switch or the sub-district gravity treatment makes the service quality of the terminal in the system 1 reduce to CELL1, and the load resource in the system 2 waste.
More than RAN1 and RAN2 carry out in each execution mode operation, in application, can as base station etc., realize by the concrete network entity of RAN side.
Thirteenth embodiment of the invention relates to a kind of different system to be switched or the gravity treatment system, as shown in Figure 9, comprises first system and second system, comprises at least one RAN node in this first system, comprises at least one network equipment in this second system.
This RAN node comprises: information acquisition unit is used for obtaining the load information of the second system sub-district adjacent with the RAN node subordinate sub-district of this first system; Switch or the gravity treatment unit, be used for assisting terminal in the RAN node subordinate sub-district of this first system, relate to the switching or the gravity treatment of sub-district in this second system according to the load information that is obtained.When thereby the load that can avoid sub-district in second system is big, terminal in the sub-district of first system still switches to the situation of the sub-district of second system, prevent to cause the imbalance of two loads between the system, thereby the service quality that causes switching the terminal in second system of back reduces, and the situation that the load resource in first system wastes.By cell load is considered switch or the condition of gravity treatment in, the load between can the sub-district of balance different system improves the utilance of the load resource of each system, the quality of service for terminal provides guarantee indirectly.
This information acquisition unit is obtained one of in the following manner the load information of sub-district in this second system:
Interface, the core net of this second system and the interface between the RAN node under the sub-district in this second system between the core net of the interface between the RAN node by this first system and the core net of first system, the core net of this first system and second system obtain the load information of sub-district this second system from the RAN node of this second system indirectly.Because second RAN of the system node can be determined the load information of its subordinate sub-district in real time, therefore make the real-time of the information of obtaining in this way better, terminal in the RAN node subordinate sub-district of the system of winning can be switched or only sub-district is arrived in the sub-district gravity treatment.
Or, interface between the network management system of the interface between the RAN node by this first system and the network management system of first system, the network management system of this first system and this second system, obtain the load information of the sub-district this second system from the network management system of this second system, this load information is reported the network management system of this second system by the RAN node under the sub-district in this second system.Because network management system originally will be obtained the load information of sub-district, so can not increase extra burden.
Or the interconnecting interface that comprises between the RAN node by this first system and the RAN node of this second system directly obtains the load information of sub-district this second system from the RAN node of this second system.Make to make that in this way the Internet resources that take in the load information transmission course are minimum, save transfer resource.
This information acquisition unit can also further comprise: request module is used for sending the load information request to the core net of the RAN of this second system node, this second system or the network management system of this second system; Receiver module is used to receive the message that comprises load information of the network management system of the core net of RAN node from this second system, this second system or this second system, obtains this load information from this message; This information acquisition unit can comprise request module and receiver module simultaneously, thus can be initiatively to the load information of the adjacent different system cell of the relevant device request of second system; Perhaps, this information acquisition unit also can only comprise receiver module, is initiatively sent the load information of different system cell by the relevant device of second system.
If comprise request module, then this request module sends this load information request in one of following situation at least: in the time need carrying out switch decision to the terminal in the RAN node subordinate sub-district of this first system, or, during period 1 property timer expiry, send this load information request.
This network equipment comprises: load information provides the unit, is used for sending to the RAN of first system node load information of the sub-district of this second system, and the RAN node subordinate's of this sub-district and this first system sub-district is adjacent.This network equipment can be the RAN node of this second system or the Network Management Equipment of this second system.
This load information provides the unit to send this load information in one of following at least situation to the RAN of this first system node: the load of the sub-district in this second system is greater than first thresholding or this load during less than second thresholding, or, when property second round timer expiry, or, when the load information request of receiving from the RAN node of this first system, send this load information.
Load information in the present embodiment comprises: the grade of load of the value of the parameter of measurement cell load and/or the value correspondence of parameter.In addition, in different system, the parameter of weighing cell load also can be different, and as in the GERAN system, the parameter of weighing cell load comprises base station transmitting power, number of users etc.; In the UMTS system, the parameter of weighing cell load comprises: terminal average transmit power, number of users etc.; In the LTE system, the parameter of weighing cell load comprises: average throughput, number of users etc.Use very flexibly, can satisfy the demand of different system.
In sum, in embodiments of the present invention, the RAN node of first system obtains the load information of sub-district in second system adjacent with this node subordinate sub-district; The RAN node of first system assists terminal in this node subordinate sub-district to relate to the switching or the gravity treatment of sub-district in second system according to the load information that is obtained.When thereby the load that can avoid sub-district in second system is big, terminal in the sub-district of first system still switch or gravity treatment to the situation of the sub-district of this second system, prevent to cause the imbalance of two loads between the system, thereby after having avoided switching or gravity treatment, the service quality of the terminal in this second system reduces, and the load resource in first system wastes.By cell load is considered switch or the condition of gravity treatment in, the load between can the sub-district of balance different system improves the utilance of the load resource of each system, the quality of service for terminal provides guarantee indirectly.
The RAN node of first system can obtain the load information of sub-district in second system by three kinds of modes: the interface between the RAN node by first system and the core net of first system, interface between the core net of the core net of this first system and second system, interface between the RAN node under the sub-district in the core net of this second system and second system, RAN node from second system obtains load information indirectly, because second RAN of the system node can be determined the load information of its subordinate sub-district in real time, therefore make the real-time of the information of obtaining in this way better, terminal in the RAN node subordinate sub-district of the system of winning can be switched or only sub-district is arrived in the sub-district gravity treatment; Or, interface between the network management system of the interface between the RAN node by first system and the network management system of first system, the network management system of this first system and second system, obtain load information from the network management system of second system, owing in the network management system load information of sub-district has been arranged, so can not increase extra burden; Or, the interconnecting interface that comprises between the RAN node by first system and the RAN node of second system, directly the RAN node from this second system obtains load information, makes to make that in this way the Internet resources that take in the load information transmission course are minimum, saves transfer resource.
Can be by the RAN node active request load information of first system; Also can initiatively send load information by the RAN node or the network management system of second system.The RAN node of first system can be when needs be switched and determined, or periodically ask load information; The RAN node of second system or network management system also can be prescribed a time limit less than following greater than the upper limit and load in load, or periodically initiatively send load information.It is very flexible to make embodiments of the present invention use, and can satisfy the demand of different system.
After the RAN node of first system gets access to load information, be handed down to terminal in this node subordinate sub-district with the forms of broadcasting, make linchpin down terminal can carry out the gravity treatment of more rational sub-district according to load information.
Though pass through with reference to some of the preferred embodiment of the invention, the present invention is illustrated and describes, but those of ordinary skill in the art should be understood that and can do various changes to it in the form and details, and without departing from the spirit and scope of the present invention.
Claims (17)
1. a different system is switched or reselecting method, it is characterized in that, comprises following steps:
The wireless access network node of first system obtains the load information of the sub-district in second system adjacent with this node subordinate sub-district;
The wireless access network node of described first system assists terminal in this node subordinate sub-district to relate to the switching or the gravity treatment of sub-district in described second system according to the load information that is obtained.
2. different system according to claim 1 is switched or reselecting method, it is characterized in that, the wireless access network node of described first system obtains one of in the following manner the load information of sub-district in second system adjacent with this node subordinate sub-district:
Interface, the core net of this second system and the interface between the wireless access network node under the sub-district in described second system between the core net of the interface between the wireless access network node by described first system and the core net of first system, the core net of this first system and second system obtain the load information of sub-district described second system from the wireless access network node of this second system indirectly; Or
Interface between the network management system of the interface between the wireless access network node by described first system and the network management system of first system, the network management system of this first system and second system, obtain the load information of sub-district described second system from the network management system of described second system, this load information is reported the network management system of this second system by the wireless access network node under the sub-district in described second system; Or
The interconnecting interface that comprises between the wireless access network node by described first system and the wireless access network node of described second system directly obtains the load information of sub-district described second system from the wireless access network node of this second system.
3. different system according to claim 2 is switched or reselecting method, it is characterized in that the wireless access network node of described first system one of at least in the following manner obtains the load information of sub-district described second system from the wireless access network node of described second system or the network management system of described second system:
Send the load information request to the core net of the wireless access network node of described second system, described second system or the network management system of described second system, obtain described load information from the message that wireless access network node, this core net or this network management system of this second system are returned, the load information in the message that this core net is returned obtains from the wireless access network node of this second system; Or
The network management system of the wireless access network node of described second system or described second system wireless access network node to described first system when satisfying predetermined condition sends the message that comprises described load information, the wireless access network node of described first system obtains described load information by receiving this message.
4. different system according to claim 3 is switched or reselecting method, it is characterized in that, the wireless access network node of described first system sends described load information request in one of following situation at least:
In the time need carrying out switch decision, send described load information request to the terminal in this node subordinate sub-district; Or
When period 1 property timer expiry, send described load information request.
5. different system according to claim 3 is switched or reselecting method, it is characterized in that described predetermined condition is:
In described second system load of sub-district greater than first thresholding or this load less than second thresholding; Or
Property second round timer expiry.
6. different system according to claim 1 is switched or reselecting method, it is characterized in that the wireless access network node of described first system assists terminal in this node subordinate sub-district to relate to the switching of sub-district in described second system according to the load information that is obtained in the following manner:
The wireless access network node of described first system is according to the load information that is obtained, for the terminal in this node subordinate sub-district is carried out switch decision, can switch to the sub-district in described second system adjacent if judge this terminal, then notify this terminal to carry out described switching with this sub-district.
7. different system according to claim 1 is switched or reselecting method, it is characterized in that the wireless access network node of described first system assists terminal in this node subordinate sub-district to relate to the gravity treatment of sub-district in described second system according to the load information that is obtained in the following manner:
The wireless access network node of described first system is handed down to terminal in this node subordinate sub-district with the load information that obtained with the forms of broadcasting;
Described terminal is obtained described load information from the broadcast message of sub-district of living in, carry out the sub-district gravity treatment according to described load information.
8. switch or reselecting method according to each described different system in the claim 1 to 6, it is characterized in that described load information comprises:
The grade of load of the value of the parameter of measurement cell load and/or the value correspondence of described parameter.
9. different system according to claim 8 is switched or reselecting method, it is characterized in that described second system is a global system for mobile communications, and it is one of following that the parameter of described measurement cell load comprises at least: base station transmitting power, number of users; Or
Described second system is a universal mobile telecommunications system, and it is one of following that the parameter of described measurement cell load comprises at least: terminal average transmit power, number of users; Or
Described second system is a long evolving system, and it is one of following that the parameter of described measurement cell load comprises at least: average throughput, number of users.
10. wireless access network node, this wireless access network node belongs to first system, it is characterized in that, and the wireless access network node of described first system comprises:
Information acquisition unit is used for obtaining the load information of the second system sub-district adjacent with this node subordinate sub-district;
Switch or the gravity treatment unit, be used for assisting terminal in this node subordinate sub-district, relate to the switching or the gravity treatment of sub-district in described second system according to the load information that is obtained.
11. wireless access network node according to claim 10 is characterized in that, described information acquisition unit is obtained one of in the following manner the load information of sub-district in described second system:
Interface between the wireless access network node in interface between the core net by the interface between the core net of this node and first system, this first system and the core net of second system, the core net of this second system and described second system under the sub-district obtains the load information of sub-district described second system from the wireless access network node of this second system indirectly; Or
Interface between the network management system by the interface between the network management system of this node and first system, this first system and the network management system of described second system, obtain the load information of sub-district described second system from the network management system of described second system, this load information is reported the network management system of this second system by the wireless access network node under the sub-district in described second system; Or
The interconnecting interface that comprises between the wireless access network node by this node and described second system directly obtains the load information of sub-district described second system from the wireless access network node of this second system.
12. wireless access network node according to claim 11, it is characterized in that, described information acquisition unit also comprises receiver module, be used to receive the message that comprises load information of the network management system of the core net of the wireless access network node from described second system, described second system or described second system, from this message, obtain described load information; Perhaps,
Described information acquisition unit also comprises described receiver module, and request module, is used for the core net of the wireless access network node to described second system, described second system or the network management system of described second system and sends the load information request.
13. wireless access network node according to claim 12 is characterized in that, the described request module sends described load information request in one of following situation at least:
In the time need carrying out switch decision, send described load information request to the terminal in this node subordinate sub-district; Or
During period 1 property timer expiry, send described load information request.
14. a network equipment, this network equipment belongs to second system, it is characterized in that, this network equipment comprises:
Load information provides the unit, is used for sending to the wireless access network node of first system load information of the described second system sub-district, and the wireless access network node subordinate's of this sub-district and this first system sub-district is adjacent.
15. network equipment according to claim 14 is characterized in that, described load information provides the unit to send described load information in one of following at least situation to the wireless access network node of described first system:
The load of sub-district during less than second thresholding, sends described load information greater than first thresholding or this load in described second system; Or
During property second round timer expiry, send described load information; Or
When the load information request of receiving from the wireless access network node of described first system, send described load information.
16., it is characterized in that described network equipment is the wireless access network node of described second system or the Network Management Equipment of described second system according to claim 14 or 15 described network equipments.
17. a different system is switched or the gravity treatment system, comprise first system and second system, it is characterized in that, described first system comprises at least one according to each described wireless access network node in the claim 10 to 13, and described second system comprises at least one according to each described network equipment in the claim 14 to 16.
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