CN101932015A - Handoff parameter adjusting method and device - Google Patents
Handoff parameter adjusting method and device Download PDFInfo
- Publication number
- CN101932015A CN101932015A CN2009101494722A CN200910149472A CN101932015A CN 101932015 A CN101932015 A CN 101932015A CN 2009101494722 A CN2009101494722 A CN 2009101494722A CN 200910149472 A CN200910149472 A CN 200910149472A CN 101932015 A CN101932015 A CN 101932015A
- Authority
- CN
- China
- Prior art keywords
- sub
- district
- handoff
- cell
- switching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a handoff parameter adjusting method and device; in the method, as the handoff parameter adjustment caused by load balancing is limited by the handoff parameter adjustment caused by mobility robustness optimization, specifically, the handoff parameter is configured to satisfy the following conditions for the handoff parameter adjustment caused by the load balancing between a first cell and a second cell: the parameter is between the handoff premature point and the handoff late point of the mobility robustness optimization of the first cell; and a handoff protecting area exists between the first cell and the second cell. The invention can improve the network optimizing performance.
Description
Technical field
The present invention relates to the communications field, particularly, relate to handoff parameter adjusting method and device.
Background technology
Long Term Evolution (Long Term Evolution, abbreviating LTE as) network is by E-UTRAN (Evolved UTRAN) base station eNB (Evolved NodeB) and evolution packet switching center (Evolved Packet Core, abbreviate EPC as) form the network configuration flattening.Wherein, E-UTRAN comprises the set of the eNB that is connected by the S1 interface with EPC, can connect by X2 between the eNB.S1, X2 are logic interfacing.An EPC can manage one or more eNB, and a NodeB also can be controlled by a plurality of EPC, and an eNB can manage one or more sub-districts.The LTE-A system is by the LTE system evolved, and the network architecture is consistent with LTE.
MANET (Self Organization Network abbreviates SON as) is a kind of technology of carrying out network configuration and optimization automatically.The characteristics of this technology are self-configuring, self-optimizing, the application of this technology in LTE makes that LTE base station (eNB) can be according to the automatic configuration network parameter of certain measurement, and carry out Automatic Optimal according to network change, thus keep the network performance optimum, save lot of manpower and material resources simultaneously.In SON, comprise load balancing optimization and handoff parameter optimization.
The target of load balancing optimization (MLB, Mobility Load balancing optimisation) is to optimize sub-district gravity treatment/handoff parameter, tackling unbalanced traffic load, and is minimised as and reaches required switching of load balancing and redirected number of times.Mobility parameter in preload self-optimizing LTE and between RAT at sub-district and adjacent area can improve power system capacity and compare sub-district gravity treatment/handoff parameter that static state/nothing is optimized.Such optimization can also minimize the manual intervention in network management and the optimization task.Load balancing should not have negative effect to user's QoS.
At present, the solution of load balancing optimization is as follows: determine that by a kind of algorithm distributing user equipment (User Equipment abbreviates UE as) is resident or be connected to a sub-district, with balanced traffic load.This can reach by delay or the switching of minizone UE in advance.
The action that load balancing optimization comprised is as follows:
(1) load of eNB monitoring jurisdiction district, and by X2 or S1 interface and adjacent node exchange pertinent information.For example, the type by the load in smaller interval, ongoing business, cell configuration etc., determining whether needs to distribute cell load to abutting subdistrict or common coverage cell, comprises the sub-district of different RAT.(2) eNB jurisdiction district and one or more neighboring interval switch and/or cell reselection parameters revise to be consulted, make the terminal that is in cell edge can more easily switch/gravity treatment is to load lighter sub-district relatively.
Because inappropriate switching (Handoff, abbreviating HO as) parameter setting can cause HOping-pong (table tennis switch), HO failures (handoff failure) and Radio Link Failures (Radio Link Failure, RLF), experience to the user causes negative effect and can waste Internet resources, therefore, need carry out mobility optimization (MRO, Mobility robustnessoptimisation).But not causing the HO failure of RLF is can find with visible for the user, and the RLF that the HO parameter settings of mistake causes is influential for user experience and network performance.Therefore, the main purpose of mobility optimization is exactly to reduce the relevant RLF of HO.Further, unoptimizable HO parameter configuration even without causing RLF, also can cause the serious decline of service quality.For example, for the mistake setting of HO hysteresis, can cause table tennis to switch or in unoptimizable sub-district residence time long.Therefore, second purpose of mobility optimization is exactly to reduce unnecessary switching or the switching of losing, to improve network performance.
The process that terminal is switched in network is as follows: network side is made handover decisions according to this sub-district and the signal quality of adjacent cells of terminal to report based on certain handoff algorithms, then, carries out concrete switching flow according to handover decisions notice terminal.For self-optimization of switching parameter, be to carry out the basis that handoff parameter is adjusted to the accurate judgement of handoff failure or the handoff scenario do not expected.
The HO failure can be categorized as: the failure that (1) HO causes excessively evening; (2) failure that causes too early of HO; (3) failure that causes of wrong cell.
Fig. 1 shows the late excessively scene of a kind of switching, and as shown in Figure 1, UE among the Cell b RLF has taken place under eNB B, attempts carrying out RRC then among the Cell a under eNB A and rebuilds.Then illustrate from this UE late excessively to the switching of sub-district Cell a from sub-district Cell b.
Fig. 2 shows a kind of too early scene of switching, as shown in Figure 2, after switching to the sub-district Cell b under the eNB B the sub-district Cell a of UE under eNB A just in Cell b RLF has taken place soon, then, UE has selected sub-district Cell a to carry out the RRC reconstruction, just gets back to again and carries out the RRC reconstruction in the sub-district before switching.Illustrate that then UE is too early to the switching of sub-district Cell b from sub-district Cell a.
Fig. 3 shows a kind of scene of selecting wrong cell of switching, and as shown in Figure 3, the Cell c of UE from eNB C under after switching to Cell b under the eNB B RLF just taken place soon, and then, the sub-district Cell a of UE under eNB A carries out the RRC reconstruction.Then Cell b is wrong Target cell under the eNB B of explanation selection, and correct Target cell is sub-district Cell a, that is to say, UE should directly carry out the switching from sub-district Cell c to sub-district Cell a.
From above description as can be known, load balancing optimization and mobility optimizing process all are by adjusting the purpose that handoff parameter reaches the network optimization, but, owing to these the two kinds reasons of optimizing scenario triggered are different, promptly, the optimization of load balancing handoff parameter be with the minizone load difference serve as the judgement foundation, the optimization of mobility handoff parameter then is to serve as the judgement foundation with the cell signal quality, and load balancing optimization and mobility optimization is separate, therefore, after load balancing optimization is adjusted current handoff parameter, if it is improper that handoff parameter is adjusted, can cause the performance of handoffs of minizone to descend, cause the generation of terminal RLF, influence user satisfaction
Summary of the invention
Consider that the load balancing optimization that exists in the correlation technique and mobility optimize separately, can't reach the problem of network optimization optimum and propose the present invention that for this reason, the present invention aims to provide a kind of improved handoff parameter adjusting method, in order to address the above problem.
The invention discloses a kind of handoff parameter adjusting method, wherein, the handoff parameter adjustment that is tied and causes for the handoff parameter adjustment that causes by load balancing in mobility optimization.
Preferably; for the handoff parameter adjustment between first sub-district and second sub-district that causes owing to load balancing; the handoff parameter of first sub-district is set to satisfy following condition: between the switching of the mobility optimization of first sub-district cross earlier and switched late between, and make to win and have the switch protecting zone between the sub-district and second sub-district.
Preferably, make to win and have the switch protecting zone between the sub-district and second sub-district by carrying out one of following setting:
Va＞Wa and Vb＞Wb;
Va≤-Wa and Vb＞Wb, and | Vb|＞| Va|;
Vb≤-Wb and Va＞Wa, and | Va|＞| Vb|;
Wherein, Va is the handoff parameter of first sub-district, and Wa is the switching guard interval of first sub-district, and Vb is the handoff parameter of second sub-district, and Wb is the switching guard interval of second sub-district.
Wherein, the switch protecting zone is the zone between the handoff boundary of the handoff boundary of first sub-district and second sub-district, and in the switch protecting zone, subscriber equipment resides in former Serving cell.Preferably, if first sub-district be higher than the preload of working as of second sub-district when preload, then dwindle the handoff boundary of first sub-district or enlarge the handoff boundary of second sub-district.
According to a further aspect in the invention, provide a kind of handoff parameter adjusting device, this device comprises: first determining unit, and the switching that is used for definite sub-district is crossed breakfast and was switched late; Second determining unit is used for determining the handoff boundary of sub-district; Adjustment unit is used for handoff boundary separately late based on switching earlier, switching, two sub-districts of switching, carries out the handoff parameter adjustment.
Preferably, the handoff parameter adjustment comprises: make the handoff parameter adjusting range between the switching of the mobility optimization of first sub-district cross earlier and switched late between, and make to win and have the switch protecting zone between the sub-district and second sub-district.
Preferably, make to win and have the switch protecting zone between the sub-district and second sub-district by carrying out one of following setting:
Va＞Wa and Vb＞Wb;
Va≤-Wa and Vb＞Wb, and | Vb|＞| Va|;
Vb≤-Wb and Va＞Wa, and | Va|＞| Vb|;
Wherein, Va is the handoff parameter of first sub-district, and Wa is the switching guard interval of first sub-district, and Vb is the handoff parameter of second sub-district, and Wb is the switching guard interval of second sub-district.
Preferably, said apparatus also comprises: the handoff boundary adjustment unit, be used for the preload of working as according to two sub-districts, handoff boundary to the sub-district is adjusted, if first sub-district be higher than the preload of working as of second sub-district when preload, then dwindle the handoff boundary of first sub-district or enlarge the handoff boundary of second sub-district.
Above-mentioned at least one technical scheme that provides by the embodiment of the invention, the handoff parameter adjusting range that load balancing optimization is caused retrains, the handoff parameter adjustment that makes load balancing optimization cause reduces the ambulant influence to the minizone as far as possible, in prior art, carry out the processing that load balancing optimization and mobility are optimized separately, can further improve network optimizing performance.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 be according to the switching of correlation technique the schematic diagram of evening show scape;
Fig. 2 is the schematic diagram according to the too early scene of switching of correlation technique;
Fig. 3 is a schematic diagram of selecting the scene of wrong cell according to the switching of correlation technique;
Fig. 4 is according to switching too early/switched the schematic diagram in evening among the CELLA of the embodiment of the invention;
Fig. 5 and Fig. 6 optimize under the scene according to the mobility of the embodiment of the invention to switch too early/switched the schematic diagram in evening among the CELLA/CELL B;
Fig. 7 to Fig. 9 is the schematic diagram according to the switching guard interval of the embodiment of the invention;
Figure 10 shows the schematic diagram of adjusting according to the handoff parameter of the embodiment of the invention;
Figure 11 to Figure 13 adjusts schematic diagram according to the handoff boundary of the embodiment of the invention;
Figure 14 to Figure 16 adjusts schematic diagram according to the handoff boundary of the embodiment of the invention;
Figure 17 is the structured flowchart according to the handoff parameter adjusting device of the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described.If do not conflict, the feature among the embodiment of the invention and the embodiment can make up mutually.
According to the embodiment of the invention, a kind of improved handoff parameter adjusting method is provided, this method is suitable for being applied in the LTE/LTE-A system, particularly, the embodiment of the invention provides a kind of and has optimized how to carry out handoff parameter adjustment ground scheme under the scene at load balancing optimization and mobility, wherein, when carrying out load balancing optimization, consider to take place the handoff threshold of these switching problem correspondences, when load balancing optimization is adjusted handoff parameter, adjusting range is limited in the scope that mobility optimization allowed, promptly, the handoff parameter adjusting range that load balancing optimization causes is tied and optimizes the handoff parameter adjusting range in mobility, like this, can guarantee the coordinate operation that load balancing optimization and mobility are optimized, the handoff parameter adjustment that load balancing optimization causes is reduced to minimum to the influence of minizone mobility effect, make handoff parameter adjust optimization, reach the purpose of network self-organization.
Fig. 4 has provided and has switched too early/switched the schematic diagram in evening among the CELL A.In Fig. 4, for CELL A, abscissa R represents distance, ordinate RSRP representation signal intensity.CELL A is by the relevant statistics of inner mobility optimization, and for example, the performance of handoffs counters count can be judged the too early switching point (Ra is too early) of CELL A and the late switching point of mistake (Ra is late excessively) of CELL A, and concrete computational methods can be as described below:
Usually, the measurement event A3 of utilization (Event A3) carries out switch decision:
Event?A3(Neighbor?becomes?offset?better?than?serving)
Inequality?A3-1(Entering?condition)
Mn+Ofn+Ocn-Hys＞Ms+Ofs+Ocs+Off
That is:
Mn＞Ms+(Ofs-Ofn)+(Ocs-Ocn)+Off+Hys
If: O=(Ofs-Ofn)+(Ocs-Ocn)+Off
Then: Mn＞Ms+O+Hys
Wherein, Ms represents the signal quality of Serving cell, Mn represents signal quality of adjacent cells, Ofs represents the frequency particular offset of service frequency, Ofn represents the frequency particular offset of adjacent area frequency, and Ocs represents the cell specific offset of Serving cell, and Ocn represents the cell specific offset of abutting subdistrict, Off represents the skew of A3 incident, and Hys represents the sluggishness of A3 incident.
For CELLA:
When Mn＞Ms+O1+Hys, switch, establish O1+Hys=Va
Suppose that Va1 represents that terminal takes place to switch too early in CELL A probability or number of times surpass threshold value, then when Va＜Va1, also promptly easy more when CELL A switches to CELL B as UE, the possibility of too early switching is big more.Suppose that Va2 represents that terminal took place to switch evening in CELL A probability or number of times surpass threshold value, then when Va＞Va2, also promptly difficult more when CELLA switches to CELL B as UE, the possibility of crossing late switching is big more.
Va1 here and Va2 can be set by the OAM backstage, also can be in network operation process be set according to self statistics by CELL A.
In like manner, for CELL B:
When Mn＞Ms+O2+Hys, switch, establish O2+Hys=Vb
Probability or number of times that the terminal of representing Vb1 takes place to switch too early in CELL B surpass threshold value, and then when Vb＜Vb1, also promptly easy more when CELL A switches to CELLB as UE, the possibility of too early switching is big more.Probability or number of times that the terminal of representing Vb2 took place to switch evening in CELL B surpass threshold value, and then when Vb＞Vb2, also promptly difficult more when CELLA switches to CELL B as UE, the possibility of crossing late switching is big more.
Vb1 here and Vb2 can be set by the OAM backstage, also can be in network operation process be set according to self statistics by CELL A.
In simple mobility is optimized, with the A3 incident for example, also promptly when Va, Vb＞0, just can switch, in the ideal case, too early/late boundary line of mistake of CELL A and CELL B is symmetrical, but, because calculate respectively two sub-districts, therefore, the difference of Va1, Va2, Vb1, Vb2 some deviations can occur unavoidably.Fig. 5 has comprehensively provided the schematic diagram of switching in evening too early/excessively of CELLA and CELL B.As shown in Figure 5, the adjusting range that Va allows is Va1＜Va＜Va2, and the adjusting range that Vb allows is Vb1＜Vb＜Vb2.
When introducing load balancing optimization,, therefore, there is situation about switching under the situation of Mn-Ms＜0 because the switching that load balancing triggers is main foundation with load difference.Under load balancing optimization and mobility optimization and the situation of depositing,, also to avoid UE after switching to balanced sub-district, to introduce too early/cross late RLF simultaneously and the situation of the switching of rattling carrying out load balancing optimization when causing that handoff parameter is optimized.
In like manner, as shown in Figure 6, under the prerequisite that load balancing exists, after CELL A and CELLB carried out too early in this locality/cross switching statistics and judgement evening, the condition of switching can change too early.Similarly, the adjusting range that Va allows is Va1＜Va＜Va2, and the adjusting range that Vb allows is Vb1＜Vb＜Vb2.At this moment, Va1 and Vb1 might be negative value.Wherein, in Fig. 5 and Fig. 6, the zone 1 expression CELL B too early zone that switches, the zone that zone 2 expression CELL B switched evening, the zone 3 expression CELL A too early zone that switches, the zone that zone 4 expression CELLA switched evening.
Simultaneously, for the situation about switching that prevents to rattle takes place, also need meet the following conditions:
Va＞0 and Vb＞0 (as shown in Figure 7)
Or Va＜=0 and Vb＞0 and | Vb|＞| Va| (as shown in Figure 8)
Or Vb＜=0 and Va＞0 and | Va|＞| Vb| (as shown in Figure 9)
Wherein, in Fig. 7 to Fig. 9, zone 1 expression UE switches to the zone of CELLA from CELL B, and zone 2 expression UE switch to the zone of CELL B from CELL A, and zone 3 is a boundary belt, and UE resides in former Serving cell in this zone.
In order to prevent signal jitter, be provided with the protection be spaced apart Wa and Wb, wherein, Wa, Wb be on the occasion of.Here Wa, Wb can be set by the OAM backstage.Then following formula is transformed to:
Va＞Wa and Vb＞Wb
Perhaps Va＜=-Wa and Vb＞Wb and | Vb|＞| Va|
Or Vb＜=-Wb and Va＞Wa and | Va|＞| Vb|
By above description as can be seen; suppose and to adjust the handoff parameter of CELL A; then for CELL A; as can be seen from Figure 10; the adjusting range of the handoff parameter of CELL A is switched too early at Ra, Ra switched between evening; and to satisfy the certain switch protecting band (zone 6) of maintenance between CELLA and the CELL B, also, the zone 5 among Figure 10 allows the scope of adjustment for handoff parameter.Simultaneously, because the existence of handoff parameter negotiation mechanism, the handoff parameter of CELL B also can carry out corresponding adjustment for the adjustment demand that satisfies CELL A.
Be higher than CELL B load difference with CELL A load difference, satisfying the load balancing optimization condition is example, and the handoff parameter of CELL A and CELL B need meet the following conditions:
Va1＜Va＜Va2 and Va＞Wa and Vb＞Wb
Or Va1＜Va＜Va2 and Va＜=-Wa and Vb＞Wb and | Vb|＞| Va|
Or Va1＜Va＜Va2 and Vb＜=-Wb and Va＞Wa and | Va|＞| Vb|
Present invention is described below in conjunction with embodiment.
Embodiment one
Suppose CELL A and CELL B adjacent area each other, suppose current C ELL A and CELL
The handoff boundary of B is respectively as right side dotted line and left-hand broken line among Figure 11, and wherein, zone 6 is a switching guard interval, that is, the handoff boundary of CELL A and CELL B need guarantee minimum range at interval.If the preload of working as of CELL A is higher than the preload of working as of CELL B, and satisfies the condition of load balancing optimization, following two kinds of adjustment modes are then arranged, that is, adjust the handoff boundary of CELLA or the handoff boundary of adjustment CELL B.
(1) handoff boundary of adjustment CELL A:
Because CELLA's is too high when preload, therefore, the purpose of adjustment is to allow the UE of the edge zone that is in CELL A and CELL B can the easier CELLB of switching to.Therefore, with the adjustment of turning left of the right side dotted line among Figure 11, that is, the handoff boundary of CELL A is dwindled, the permission adjusting range of the handoff boundary of CELL A is shown in zone 5 among Figure 12.
(2) if adjust the handoff boundary of CELL B:
Because CELL A's is too high when preload, therefore, the purpose of adjustment is to allow the UE that is in CELLA and CELLB edge zone can the easier CELLB of switching to.Therefore, with the adjustment of turning left of the left-hand broken line among Figure 11, that is, the handoff boundary of CELL B is enlarged, the permission adjusting range of CELL B handoff boundary is shown in the zone among Figure 13 5.
Embodiment two
Suppose CELL A and CELL B adjacent area each other, the handoff boundary of current C ELL A and CELL B is respectively as right side dotted line and left-hand broken line among Figure 14, and wherein, area 5 is a switching guard interval, that is, left-hand broken line and right side dotted line need guarantee the minimum range of being separated by.If the preload of working as of CELL A is higher than the preload of working as of CELL B, and satisfies the condition of load balancing optimization, following two kinds of adjustment modes are arranged then: adjust the CELLA handoff boundary or adjust the CELLB handoff boundary.
(1) if adjust the handoff boundary of CELL A:
Because CELL A's is too high when preload, therefore, the purpose of adjustment is to allow the UE that is in CELL A and CELL B edge zone can more easily switch to CELL B.That is, the adjustment of turning left of the right side dotted line among Figure 14 makes the handoff boundary of CELL A dwindle, and the permission adjusting range of the handoff boundary of CELL A is shown in zone 5 among Figure 15.
(2) if adjust the handoff boundary of CELL B:
Because CELL A's is too high when preload, therefore, the purpose of adjustment is to allow the UE that is in CELL A and CELL B edge zone can more easily switch to CELLB.That is, the left-hand broken line adjustment of turning left among Figure 14 makes the handoff boundary of CELL B enlarge, and the permission adjusting range of the handoff boundary of CELLB is shown in zone 5 among Figure 16.
According to the embodiment of the invention, also provide a kind of handoff parameter adjusting device.Figure 17 is the structured flowchart that illustrates according to the handoff parameter adjusting device of the embodiment of the invention.As shown in figure 17, this device comprises following structure: first determining unit 1, second determining unit 3, adjustment unit 5; And preferably, this device can also have handoff boundary adjustment unit 7.
With sub-district CELL A particularly, first determining unit 1 is used for determining that the switching of sub-district crosses earlier and switched lately, and for example, the Ra among Fig. 4 is too early and Ra is late excessively; Second determining unit 3 is used for determining the handoff boundary of sub-district, for example, and shown in the dotted line among Figure 11 to Figure 16; Adjustment unit 5 is connected to first determining unit 1 and second determining unit 3, is used for handoff boundary separately late based on switching earlier, switching, two sub-districts of switching, carries out the handoff parameter adjustment.Similar with above-mentioned method embodiment; preferably; the handoff parameter adjustment here comprises: make the handoff parameter adjusting range between the switching of the mobility optimization of first sub-district cross earlier and switched late between, and make to win and have the switch protecting zone between the sub-district and second sub-district.
Preferably, make to win and have the switch protecting zone between the sub-district and second sub-district by carrying out one of following setting:
Va＞Wa and Vb＞Wb;
Va≤-Wa and Vb＞Wb, and | Vb|＞| Va|;
Vb≤-Wb and Va＞Wa, and | Va|＞| Vb|;
Wherein, Va is the handoff parameter of first sub-district, and Wa is the switching guard interval of first sub-district, and Vb is the handoff parameter of second sub-district, and Wb is the switching guard interval of second sub-district.
Above-mentioned handoff boundary adjustment unit 7 preferably is connected to second determining unit 3 and/or adjustment unit 5, be used for the preload of working as according to two sub-districts, handoff boundary to the sub-district is adjusted, for example, if first sub-district be higher than the preload of working as of second sub-district when preload, then dwindle the handoff boundary of first sub-district or enlarge the handoff boundary of second sub-district.Specifically can understand with reference to above-mentioned Figure 11 to Figure 16.
Above-mentioned at least one technical scheme that provides by the embodiment of the invention, by analysis to mobility handoff parameter adjusting range, and the relation of conditioning each other of minizone handoff parameter, the handoff parameter adjusting range that causes for load balancing optimization retrains, the handoff parameter adjustment that makes load balancing optimization cause can not influence minizone mobility effect, thereby make network self-organization reach optimum, improve network performance and QoS of customer.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a handoff parameter adjusting method is characterized in that,
The handoff parameter adjustment that is tied and causes for the handoff parameter adjustment that causes by load balancing in mobility optimization.
2. method according to claim 1; it is characterized in that; for the handoff parameter adjustment between first sub-district and second sub-district that causes owing to load balancing; the handoff parameter of described first sub-district is set to satisfy following condition: between the switching of the mobility optimization of described first sub-district cross earlier and switched late between, and make and have the switch protecting zone between described first sub-district and described second sub-district.
3. method according to claim 1 is characterized in that, makes and has described switch protecting zone between described first sub-district and described second sub-district by carrying out one of following setting:
Va＞Wa and Vb＞Wb;
Va≤-Wa and Vb＞Wb, and | Vb|＞| Va|;
Vb≤-Wb and Va＞Wa, and | Va|＞| Vb|;
Wherein, Va is the handoff parameter of described first sub-district, and Wa is the switching guard interval of described first sub-district, and Vb is the handoff parameter of described second sub-district, and Wb is the switching guard interval of described second sub-district.
4. according to claim 2 or 3 described methods; it is characterized in that; described switch protecting zone is the zone between the handoff boundary of the handoff boundary of described first sub-district and described second sub-district, and in described switch protecting zone, subscriber equipment resides in former Serving cell.
5. method according to claim 4 is characterized in that, if described first sub-district be higher than the preload of working as of described second sub-district when preload, then dwindle the handoff boundary of described first sub-district or enlarge the handoff boundary of described second sub-district.
6. a handoff parameter adjusting device is characterized in that, comprising:
First determining unit, the switching that is used for definite sub-district is crossed breakfast and was switched late;
Second determining unit is used for determining the handoff boundary of sub-district;
Adjustment unit is used for crossing earlier, describedly switching handoff boundary separately late, two sub-districts of switching based on described switching, carries out the handoff parameter adjustment.
7. device according to claim 6; it is characterized in that; described handoff parameter adjustment comprises: make the handoff parameter adjusting range between the switching of the mobility optimization of described first sub-district cross earlier and switched late between, and make and have the switch protecting zone between described first sub-district and described second sub-district.
8. method according to claim 7 is characterized in that, makes and has described switch protecting zone between described first sub-district and described second sub-district by carrying out one of following setting:
Va＞Wa and Vb＞Wb;
Va≤-Wa and Vb＞Wb, and | Vb|＞| Va|;
Vb≤-Wb and Va＞Wa, and | Va|＞| Vb|;
Wherein, Va is the handoff parameter of described first sub-district, and Wa is the switching guard interval of described first sub-district, and Vb is the handoff parameter of described second sub-district, and Wb is the switching guard interval of described second sub-district.
9. device according to claim 7 also comprises:
The handoff boundary adjustment unit, be used for the preload of working as according to described two sub-districts, handoff boundary to the sub-district is adjusted, if described first sub-district be higher than the preload of working as of described second sub-district when preload, then dwindle the handoff boundary of described first sub-district or enlarge the handoff boundary of described second sub-district.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910149472.2A CN101932015B (en) | 2009-06-19 | 2009-06-19 | Handoff parameter adjusting method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910149472.2A CN101932015B (en) | 2009-06-19 | 2009-06-19 | Handoff parameter adjusting method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101932015A true CN101932015A (en) | 2010-12-29 |
| CN101932015B CN101932015B (en) | 2014-03-19 |
Family
ID=43370858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910149472.2A Active CN101932015B (en) | 2009-06-19 | 2009-06-19 | Handoff parameter adjusting method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101932015B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102625365A (en) * | 2012-03-20 | 2012-08-01 | 华为技术有限公司 | Method for mobility robustness optimization (MRO) and mobility load balancing (MLB) and base station |
| CN102638831A (en) * | 2011-02-12 | 2012-08-15 | 中兴通讯股份有限公司 | Handover parameter optimization method and system |
| CN104219707A (en) * | 2013-05-29 | 2014-12-17 | 中国移动通信集团设计院有限公司 | Method, device and system for obtaining switching parameters among cells |
| WO2015109691A1 (en) * | 2014-01-27 | 2015-07-30 | 中兴通讯股份有限公司 | Mobility robustness method under multi-coverage scenarios, base station and terminal |
| CN105103615A (en) * | 2013-02-06 | 2015-11-25 | 爱立信(中国)通信有限公司 | Enhanced solution for handover |
| CN106572511A (en) * | 2016-11-15 | 2017-04-19 | 中国联合网络通信集团有限公司 | Cell switching or reselection method in heterogeneous network and apparatus thereof |
| CN107690150A (en) * | 2016-08-05 | 2018-02-13 | 中兴通讯股份有限公司 | With reference to cell quality and the mobile robustness optimization method and device of switch failure |
| CN103875282B (en) * | 2011-08-09 | 2018-03-02 | 诺基亚通信公司 | A kind of method, base station and central location for being used to optimize the mobility robustness of mobile radio communication network |
| CN110582128A (en) * | 2018-06-07 | 2019-12-17 | 华为技术有限公司 | RRC connection reestablishment method and terminal |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1352497A (en) * | 2000-11-07 | 2002-06-05 | 华为技术有限公司 | Method for ladd balancing pretreatment in mobile communication system |
| US6829491B1 (en) * | 2001-08-15 | 2004-12-07 | Kathrein-Werke Kg | Dynamic and self-optimizing smart network |
-
2009
- 2009-06-19 CN CN200910149472.2A patent/CN101932015B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1352497A (en) * | 2000-11-07 | 2002-06-05 | 华为技术有限公司 | Method for ladd balancing pretreatment in mobile communication system |
| US6829491B1 (en) * | 2001-08-15 | 2004-12-07 | Kathrein-Werke Kg | Dynamic and self-optimizing smart network |
Non-Patent Citations (2)
| Title |
|---|
| 3GPP: "Evolved Universal Terrestrial Radio Access Network(E-UTRAN),Self-configuring and self-optimizing network use cases and solutions(Release 8)", 《3GPP TS 36.902 V1.0.1》 * |
| QUALCOMM EUROPE等: "Mobility Robustness optimisation--text modification for 36.902", 《3GPP TSG RAN WG3 MEETING #63BIS》 * |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102638831A (en) * | 2011-02-12 | 2012-08-15 | 中兴通讯股份有限公司 | Handover parameter optimization method and system |
| WO2012106962A1 (en) * | 2011-02-12 | 2012-08-16 | 中兴通讯股份有限公司 | Switching parameter optimization method and system |
| CN102638831B (en) * | 2011-02-12 | 2014-12-10 | 中兴通讯股份有限公司 | Handover parameter optimization method and system |
| CN103875282B (en) * | 2011-08-09 | 2018-03-02 | 诺基亚通信公司 | A kind of method, base station and central location for being used to optimize the mobility robustness of mobile radio communication network |
| CN102625365A (en) * | 2012-03-20 | 2012-08-01 | 华为技术有限公司 | Method for mobility robustness optimization (MRO) and mobility load balancing (MLB) and base station |
| CN102625365B (en) * | 2012-03-20 | 2014-07-30 | 华为技术有限公司 | Method for mobility robustness optimization (MRO) and mobility load balancing (MLB) and base station |
| CN105103615B (en) * | 2013-02-06 | 2020-01-17 | 爱立信(中国)通信有限公司 | Enhanced solution for handover |
| CN105103615A (en) * | 2013-02-06 | 2015-11-25 | 爱立信(中国)通信有限公司 | Enhanced solution for handover |
| CN104219707B (en) * | 2013-05-29 | 2017-11-03 | 中国移动通信集团设计院有限公司 | A kind of methods, devices and systems for obtaining handover between cells parameter |
| CN104219707A (en) * | 2013-05-29 | 2014-12-17 | 中国移动通信集团设计院有限公司 | Method, device and system for obtaining switching parameters among cells |
| WO2015109691A1 (en) * | 2014-01-27 | 2015-07-30 | 中兴通讯股份有限公司 | Mobility robustness method under multi-coverage scenarios, base station and terminal |
| CN107690150A (en) * | 2016-08-05 | 2018-02-13 | 中兴通讯股份有限公司 | With reference to cell quality and the mobile robustness optimization method and device of switch failure |
| CN106572511A (en) * | 2016-11-15 | 2017-04-19 | 中国联合网络通信集团有限公司 | Cell switching or reselection method in heterogeneous network and apparatus thereof |
| CN110582128A (en) * | 2018-06-07 | 2019-12-17 | 华为技术有限公司 | RRC connection reestablishment method and terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101932015B (en) | 2014-03-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101932015B (en) | Handoff parameter adjusting method and device | |
| US8892099B2 (en) | Method for obtaining uplink signal quality of an adjacent cell and method for optimizing handoff | |
| CN101873620B (en) | Method and device for judging inter-cell reselection parameter and handover parameter matching | |
| US8917702B2 (en) | Method and device for data processing in a wireless network | |
| EP1733587B1 (en) | Methods of and apparatuses for cell-differentiated handover in a mobile communications system | |
| CN107872851B (en) | Switching method, system and base station | |
| JP5327479B2 (en) | Communications system | |
| CN102209338B (en) | Switching self-optimizing method for mobile communication network | |
| CN101635949A (en) | Switching method in wireless cellular network | |
| US9510344B2 (en) | Base station, cognitive radio system, and control method for a neighbour relationship | |
| CN105704769A (en) | Inter-base-station cell switching method and system | |
| US10104595B2 (en) | Method of automatically adjusting mobility parameter | |
| CN103096402B (en) | A kind of residence reselecting and a kind of cell switching method | |
| CN103250448A (en) | Method for determining handover criterion in a cellular wireless communication system | |
| CN103391590A (en) | Cell reselection parameter adjustment method for heterogeneous network | |
| WO2011095081A1 (en) | Method and system for managing neighboring cell information | |
| CN102938894A (en) | Measuring method for small cells in heterogeneous network | |
| CN102131256A (en) | Method and base station for implementing cell reselection parameter negotiation | |
| CN102695209A (en) | Load balancing method for different coverage scenes and base station | |
| CN103369603B (en) | The mutual operation method of self-organizing network and device | |
| CN102045780A (en) | Method and system for negotiating mobility parameter in LTE mobile communication system | |
| CN103313320A (en) | Method for switching between cells with different types | |
| CN102281569B (en) | Femto base station is based on the measurement control method of distributed strategy | |
| WO2015096402A1 (en) | Mobility parameter negotiation method and base station | |
| US20080254798A1 (en) | Handover Method and System |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |