CN102932836A - Switching processing method and system - Google Patents
Switching processing method and system Download PDFInfo
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- H—ELECTRICITY
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- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0072—Transmission or use of information for re-establishing the radio link of resource information of target access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
The invention discloses a switching processing method and a switching processing system. A target base station sends switching information to a source base station, the switching information comprises time division multiplexing distribution information which is configured for the target base station, and the source base station and/or the target base station are/is dispatched according to the switching information. By the invention, the switching performance of user equipment (UE) which is switched between a macro cell and a lower power node (LPN) cell can be improved, the probability of switching failure and the probability of call drop are reduced, and user experience and network performance are improved.
Description
Technical field
The present invention relates to the mobile communication technology field, relate in particular to a kind of switching handling method and system.
Background technology
Development along with mobile communication and information technology, the user is growing to the demand of data business, present main flow mobile communications network, no matter be to adopt GSM (Global System For Mobile Communication, global system for mobile communications)/GPRS (General Packet Radio Service, GPRS) 2nd generation/the 2.5th third generation mobile communication network, still adopt UMTS (Universal Mobile Telecommunications System, universal mobile telecommunications system) the 3rd third generation mobile communication network, it all is the homogeneous network (Homogeneous Network) by operator's unified planning to deploy, in a single day homogeneous network disposes, and the capacity of network is fixed in the certain area.In order to satisfy the day by day data traffic requirement of blowout, need operator to dispose more homogeneous network website, on the one hand, deployment and the grand website of the isomorphism that upholds one's heritage are costly, on the other hand, even in a large amount of new site of legacy network basis deploy, each website is in case dispose, its network capacity is fixed, and can not adapt to the demand of business load variation in some areas in the network and the demand that QoS (Quality of Service, service quality) changes.
In order to adapt to the growing data traffic requirement of user, the 4th third-generation mobile communication is at some low power nodes of basic deploy (Lower Power Node of original homogeneous network, referred to as LPN), comprise the little base station of low-power (pico eNB), Home eNodeB (HeNB/CSG/femto), via node (relay) etc., these low power nodes are because its transmitting power is lower, therefore with respect to the base station (eNB of Incumbent unified plan, NB etc.) macrocell that covers (macro cell), the residential quarter that these low power nodes cover can be referred to as Microcell (micro cell) or small-cell (small cell) or low power nodes residential quarter (LPN cell).
Low power nodes is disposed flexibly, such as being deployed in the hot spot region, increases the covering of hot spot region, is the schematic diagram that a kind of low power nodes focus covers as shown in Figure 1.Low power nodes can be deployed in the hot spot region flexibly according to number of users, increases the network capacity of hot spot region, alleviates the load of hot spot region macrocell.Low power nodes can also be deployed in cell edge, strengthens the covering of cell edge, and Fig. 2 is the schematic diagram that a kind of low power nodes cell edge covers, and can effectively strengthen the covering of cell edge, improves the Qos of Cell Edge User.In addition, low power nodes can also be deployed in indoor, strengthens indoor covering, Figure 3 shows that the schematic diagram of the indoor covering of a kind of low power nodes, can effectively strengthen indoor covering, improve the Qos of indoor user, satisfy the high traffic demand of indoor user, alleviate simultaneously the load of macrocell.
The deployment of low power nodes can strengthen the residential quarter and cover on traditional macrocell basis, increase network capacity, shares the macrocell load, strengthens specific user's quality of service.Yet, low power nodes is because its transmitting power is low, the relatively traditional macrocell of its cell coverage area is little a lot, especially for the low power nodes of disposing with frequency, be that the operating frequency of the low power nodes of disposing in operating frequency and its coverage of macrocell is when identical, if switch untimely, subscriber equipment (User Equipment, referred to as UE) will be subject to the strong jamming of described macrocell or described low power nodes residential quarter at described macrocell and described low power nodes cell edge, thereby cause handoff failure or UE call drop, finally affect the user and experience and systematic function.
Therefore, in the network of macrocell and the coexistence of low power nodes residential quarter, how correctly to realize efficiently the reliable seamless switching of UE between macrocell and low power nodes residential quarter, directly having influence on the user experiences, can the deployment that be related to low power nodes really be embodied as traditional macrocell and strengthen covering, strengthen network capacity, share the macrocell load, thereby finally affect systematic function.And the switching handling method between existing macrocell and the macrocell still can not guarantee the reliable seamless switching of UE between macrocell and low power nodes residential quarter.
Summary of the invention
The technical problem that the present invention solves provides a kind of switching handling method and system, realizes the reliable seamless switching of UE between dissimilar residential quarters (such as macrocell and low power nodes residential quarter).
For solving the problems of the technologies described above, the invention provides a kind of switching handling method,
Target BS sends handover information to source base station;
Described source base station and/or described target BS are dispatched according to described handover information.
Further, described method also comprises:
Described source base station is avoided solicited message to described target BS transmission switching enhancing solicited message or interference before switching is initiated or in switching set-up procedure.
Further, described handover information comprises and switches enhancing information or information is avoided in interference that described switching strengthens information or interference avoids information to comprise: the time division multiplexing assignment information of described target BS configuration.
Further, described source base station was avoided solicited message to described target BS transmission switching enhancing solicited message or interference before switching initiation, specifically comprise:
After described source base station was received the information near the lower Target cell of target BS control that subscriber equipment (UE) reports, described source base station sent to described target BS and switches the enhancing solicited message or solicited message is avoided in interference.
Further, described source base station is avoided solicited message to described target BS transmission switching enhancing solicited message or interference in switching set-up procedure, specifically comprise:
Described source base station is when being to be switched UE initiation switching flow, and described source base station is avoided solicited message to described target BS transmission switching enhancing solicited message or interference in handover request or handoff requirement message.
Further, described switching enhancing solicited message or interference avoid solicited message to be: described UE is the information of the historical residential quarter of resident mistake (UE History Information) once.
Further, described target BS sends described handover information to described source base station after receiving described switching and strengthening solicited message or interference and avoid solicited message.
Further, the described time division multiplexing assignment information sub-frame allocation message bit pattern that is the fixed cycle.
Further, described source base station is dispatched according to described handover information, specifically comprises:
Described source base station is according to the time division multiplexing assignment information of described target BS configuration, reduce down transmitting power or stop to be switched UE under the described source base station of time scheduling of downlink transfer at described target BS, perhaps stop to be switched UE under the described source base station of time scheduling of uplink and downlink transmission at described target BS.
Further, described target BS is dispatched according to described handover information, specifically comprises:
Described target BS is according to the time division multiplexing assignment information of configuration, UE under the described target BS is dispatched distributing in the time of described target BS, within the non-time of distributing to described target BS, stop the UE under the described target BS is dispatched.
Further, described handover information comprises that switching strengthens timer effective time;
Described source base station and/or described target BS only in described switching strengthens the running time of timer effective time, are dispatched according to described handover information.
Further, described method also comprises:
Described target BS sends handover information cancellation message to described source base station;
Described target BS is not subjected to the restriction of described handover information when scheduling after sending described handover information cancellation message; And/or described source base station is not subjected to the restriction of described handover information when scheduling after receiving described handover information cancellation message.
Further, described UE successful switch is behind target BS, and described source base station and/or described target BS are not subjected to the restriction of described handover information when scheduling.
The present invention also provides a kind of switching processing system, and described system comprises in the base station:
The handover information sending module is used for sending handover information to source base station;
The handover information receiver module is used for the handover information that the receiving target base station sends;
Schedule process module is used for dispatching according to described handover information.
Further, described system also comprises:
The handover request module for before initiating in switching or in the switching set-up procedure, is avoided solicited message to target BS transmission switching enhancing solicited message or interference, specifically comprises:
After receiving the information near the Target cell under the target BS control that UE reports, send to switch to described target BS and strengthen solicited message or solicited message is avoided in interference;
When being to be switched UE initiation switching flow, in handover request or handoff requirement message, avoid solicited message to target BS transmission switching enhancing solicited message or interference.
Further, the switching that described handover request module sends strengthens solicited message or solicited message is avoided in interference, and comprising: described UE is the information of the historical residential quarter of resident mistake once.
Further, described handover information sending module is used for, and after receiving described switching that described handover request module sends and strengthening solicited message or interference and avoid solicited message, sends described handover information to described source base station.
Further, the described handover information that described handover information sending module sends comprises and switches enhancing information or information is avoided in interference that described switching strengthens information or interference avoids information to comprise: the time division multiplexing assignment information of target BS configuration.
Further, described schedule process module is used for:
Time division multiplexing assignment information according to described target BS configuration, reduce down transmitting power or stop to be switched UE under the described source base station of time scheduling of downlink transfer at described target BS, perhaps stop to be switched UE under the described source base station of time scheduling of uplink and downlink transmission at described target BS;
Perhaps, according to the time division multiplexing assignment information of configuration, the UE under the described target BS is dispatched distributing in the time of described target BS, within the non-time of distributing to described target BS, stop the UE under the described target BS is dispatched.
Further, the described handover information of described handover information sending module transmission comprises: switch and strengthen timer effective time;
Described schedule process module only in described switching strengthens the running time of timer effective time, is dispatched according to described handover information.
Further, described handover information sending module also is used for, and sends handover information cancellation message to source base station;
Described schedule process module is used for, and sends described handover information cancellation message and/or after the handover information receiver module receives described handover information cancellation message, is not subjected to the restriction of described handover information when scheduling at described handover information sending module.
Further, described schedule process module is used for, and behind target BS, is not subjected to the restriction of described handover information at described UE successful switch when scheduling.
Adopt the above-mentioned hand-off process scheme of the present invention, the performance of handoffs in the time of can strengthening UE and switches between macrocell and LPN residential quarter reduces handoff failure probability and call drop probability, raising user experience and network performance.
Description of drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram that a kind of low power nodes focus covers;
Fig. 2 is the schematic diagram that a kind of low power nodes cell edge covers;
Fig. 3 is the schematic diagram of the indoor covering of a kind of low power nodes;
Fig. 4 is the switching flow that source base station and target BS have direct interface (X2 interface);
Fig. 5 is macrocell and low power nodes residential quarter covering relation and the corresponding signal quality variation schematic diagram that covers position macrocell and low power nodes residential quarter;
Fig. 6 is the schematic flow sheet of embodiment of the present invention;
Fig. 7 is the flow chart of the embodiment of the invention one;
Fig. 8 is the schematic diagram of a kind of time division multiplexing assignment information of switching enhancing information;
Fig. 9 is the flow chart of the embodiment of the invention two;
Figure 10 is the flow chart of the embodiment of the invention three;
Figure 11 is that the flow chart of avoiding information/switching enhancing information is disturbed in the embodiment of the invention four cancellations.
Embodiment
Being illustrated in figure 4 as source base station in the correlation technique (being called S-eNB) and target BS (being called T-eNB) has the switching flow of direct interface (X2 interface), and idiographic flow is as follows:
Step 401. is measured;
UE measures the signal quality of Serving cell and adjacent area.
Step 402.UE reporting measurement reports is to S-eNB;
UE is according to 401 measurement, and reporting measurement reports reports the signal quality of Target cell in the measurement report.
After step 403.S-eNB receives measurement report, make the handover decisions that switches to Target cell.
Step 404.S-eNB and T-eNB switch preparation, specifically comprise:
Step 404a.S-eNB sends handover request (HANDOVER REQUEST) to T-eNB, transmit T-eNB in the handover request and prepare to admit the needed necessary information of UE, such as X2 interface and the S1 interface message of UE at S-eNB, the cell ID of Target cell (Cell Global Identity, CGI), UE is at contextual information of S-eNB etc.;
Step 404b.T-eNB sends switching request response (HANDOVER REQUEST ACKNOWLEDGE) to S-eNB, carries T-eNB accesses Target cell for the UE of this UE configuration at the context of S-eNB according to the UE of S-eNB transmission resource information in the switching request response.
Step 405.S-eNB sends switching command to UE;
Send T-eNB accesses Target cell for the UE of this UE configuration at the context of S-eNB according to the UE of S-eNB transmission resource information in the switching command.
Step 406.UE switches to Target cell.
Fig. 5 is a kind of macrocell and low power nodes residential quarter covering relation (5a) and corresponding signal quality variation (5b) schematic diagram that covers position macrocell and low power nodes residential quarter.Shown in Fig. 5 a, 501 is macro base station (eNB), and 502 is the macrocell (macro cell) under macro base station 501 controls, and 503 is LPN, is deployed under the 502macro cell coverage.504 is the low power nodes residential quarter (LPN cell) under 503 controls, because 503 transmitting power is smaller, such as 30dB, so the coverage of LPN cell 504 is much smaller than the coverage of macrocell 502.Certain subscriber equipment (UE) is in Radio Resource control (Radio Resource Control) connection status at 502 times, and the course of UE under the network coverage shown in Fig. 5 a is shown in 505.506 is Zone switched between macrocell 502 and the LPN residential quarter 504, when UE advance to 506 Zone switched after, if UE can 506 Zone switched in be successfully completed switching from macrocell 502 to LPN residential quarters 504 (such as the switching flow that utilizes as shown in Figure 4), then the business of UE is kept on the one hand, can guarantee user's business experience, under the 503LPN node, can be shared, and increased power system capacity by the load of macro base station 501 by successful switch for this UE on the other hand.
Yet shown in Fig. 5 b, 510 is the signal quality variation schematic diagram of macrocell, and 511 is the signal quality variation schematic diagram of LPN residential quarter, corresponding diagram 5a, and 507～509 is Zone switched between macrocell 502 and the LPN residential quarter 504.Since 507, the signal quality of macrocell 502 reduces slowly and the signal quality of LPN residential quarter 504 strengthens fast, therefore in Zone switched, UE is at Signal Interference and Noise Ratio (the Signal to Interference plus Noise Ratio of Serving cell (macrocell 502), referred to as SINR) with fast reducing, thereby step 405 switching command that the downlink resource that might cause S-eNB scheduling UE forwarding step 402 measurement reports among Fig. 4 assigns signaling and/or S-eNB to send to UE is subject to target LPN residential quarter (504) interference and takes defeat, finally cause UE handoff failure even call drop, affect the business experience of UE, if and the Zone switched most of UE between macrocell 502 and LPN residential quarter 504 all handoff failure even call drop, then reduce the most at last network performance.Especially S-eNB sends to the switching command of UE, because behind the UE reporting measurement reports, S-eNB could send to UE after need to and switching set-up procedure through as shown in Figure 4 handover decisions, can order UE to switch from the measurement report of receiving UE to S-eNB, need the time delay through a few tens of milliseconds (ms), this moment, UE was very poor at the SINR of cell-of-origin, therefore very likely caused switching command to be interfered and to take defeat.
Shown in Figure 5 is handoff failure or call drop may appear in UE when macrocell moves to the LPN residential quarter according to 505 course situation, when UE moves from the LPN residential quarter to macrocell, can exist too because UE causes the situation of UE from the LPN residential quarter to macrocell handoff failure even call drop at the SINR of Serving cell fast reducing.
For addressing the above problem, present embodiment proposes a kind of switching handling method, and the performance of handoffs when switching between dissimilar residential quarters (such as macrocell and LPN residential quarter) for enhancing UE improves the user and experiences and network performance.As shown in Figure 6, the switching handling method of present embodiment adopts following scheme:
Step 601 (optional). source base station sends switching to target BS before switching initiation or in the switching set-up procedure and strengthens solicited message (or solicited message is avoided in interference);
Wherein, this step is optional step, and namely source base station also can not send to switch to target BS and strengthen solicited message (or disturb and avoid solicited message).
Step 602. target BS feeds back handover information to source base station;
Described handover information specifically comprises and switches enhancing information or information is avoided in interference;
Consider the restriction of handover information (avoiding information as switching enhancing information or interference) when step 603. source base station and/or target BS scheduling.
Wherein, source base station sent switching to target BS and strengthens solicited message (solicited message is avoided in interference) before switching initiation, refer to: source base station receive that UE reports near the information of the Target cell under the target BS control time, source base station sends to switch to target BS and strengthens request message (request message is avoided in interference), has perhaps carried and has switched the X2 interface message that strengthens solicited message item (the solicited message item is avoided in interference).
Described target BS sends the X2 interface message of switching enhancing informational message (informational message is avoided in interference) or having carried switching enhancing item of information (item of information is avoided in interference) after receiving described switching enhancing request message (request message is avoided in interference) or having carried the X2 interface message of switching enhancing solicited message item (the solicited message item is avoided in interference) to described source base station.
The restriction of considering to switch enhancing information (information is avoided in interference) when source base station and target BS scheduling.
Preferably, described UE successful switch is behind described target BS, perhaps described target BS sends to described source base station and switches enhancing information (information is avoided in interference) after a period of time, described target BS sends to described source base station and switches enhancing information (information is avoided in interference) cancellation message, is not switched the restriction of enhancing information (information is avoided in interference) when described target BS and the scheduling of described source base station.
Wherein, source base station sends switching to target BS and strengthens request (request is avoided in interference) in switching set-up procedure, refer to: source base station is in handover request, send in the handoff requirement message to switch and strengthen solicited message item (the solicited message item is avoided in interference), perhaps source base station sends the once information of the historical residential quarter of resident mistake of UE in handover request message, described target BS receives that described switching strengthens solicited message item (the solicited message item is avoided in interference) or described UE once after the information of the historical residential quarter of resident mistake, sends to switch to source base station to strengthen item of information (item of information is avoided in interference) in switching request response.The restriction of considering to switch enhancing information (information is avoided in interference) when source base station and target BS scheduling.
Preferably, the UE successful switch is not switched the restriction of enhancing information (information is avoided in interference) when target BS and source base station scheduling behind target BS.
Wherein, described switching enhancing information (information is avoided in interference) is the time division multiplexing assignment information of T-eNB configuration.
Concrete, described time division multiplexing information is: the sub-frame allocation message bit pattern of fixed cycle.
Preferably, described switching strengthens information (information is avoided in interference) can also comprise switching enhancing information timer effective time, described source base station and described target BS only consider to switch enhancing information (information is avoided in interference) at switching enhancing information timer effective time in running time restriction.
Further, source base station considers to switch enhancing information (information is avoided in interference) when scheduling restriction specifically comprises:
Source base station is according to the time division multiplexing assignment information of described target BS configuration, reduce down transmitting power or stop to be switched UE under the time scheduling source base station of downlink transfer at target BS, perhaps stop to be switched UE under the time scheduling source base station of uplink and downlink transmission at target BS.
Target BS considers to switch enhancing information (information is avoided in interference) when scheduling restriction specifically comprises:
Target BS is dispatched the UE under the target BS distributing in the time of target BS according to the time division multiplexing assignment information of configuration, stops the UE under the target BS is dispatched within the non-time of distributing to target BS.
For making the purpose, technical solutions and advantages of the present invention clearer, hereinafter in connection with accompanying drawing embodiments of the invention are elaborated.Need to prove that in the situation of not conflicting, the embodiment among the application and the feature among the embodiment be combination in any mutually.
Embodiment one
UE moves to Zone switched between macrocell and the LPN residential quarter from macrocell, and perhaps UE moves to Zone switched between LPN residential quarter and the macrocell from the LPN residential quarter.There is direct physical to be connected X2 interface between macrocell place source base station (S-eNB) and place, the LPN residential quarter LPN node (T-eNB).
As shown in Figure 7, the performance of handoffs when switching between macrocell and LPN residential quarter for strengthening UE, present embodiment is implemented as follows:
Step 701. is measured;
UE measures the signal quality of Serving cell and adjacent area.
Step 702.UE reporting measurement reports is to S-eNB;
UE is according to the measurement of step 701, and reporting measurement reports reports the signal quality of Target cell in the measurement report.
After step 703.S-eNB receives measurement report, make the handover decisions that switches to Target cell.Meanwhile, S-eNB is according to its adjacent area list information or according to OAM (Operation Administration and Maintenance, webmaster) configuration, judge that Target cell is a residential quarter dissimilar with Serving cell (be a LPN residential quarter LPN control under such as the present embodiment Target cell), further optimize, S-eNB judges that also the cell site spacing between Target cell and the cell-of-origin is less.Be that S-eNB judges Zone switched little a lot of with respect to the station spacing between normal macrocell and the macrocell between Target cell and the cell-of-origin, need to switch enhancing, then S-eNB makes the decision-making that need to switch enhancing simultaneously.
Step 704.S-eNB and T-eNB switch preparation, specifically comprise:
Step 704a.S-eNB sends handover request to T-eNB, and the information of transmitting in sending Fig. 4-404a in the handover request, S-eNB also sends to switch to strengthen request or switch to T-eNB and strengthens indication;
Step 704b.T-eNB sends switching request response to S-eNB, and the information in the switching request response in carrying Fig. 4-404b, T-eNB also sends the enhancing information of switching to S-eNB.
Described switching strengthens the time division multiplexing assignment information that information can be the T-eNB configuration, such as for Frequency Division Duplexing (FDD) (Frequency Division Duplexing, FDD) system, described time division multiplexing assignment information can be that one-period is the sub-frame allocation bitmap of 40ms, in sub-frame allocation bitmap shown in Figure 8, each correspondence represents a subframe, " 0 " is illustrated on the corresponding subframe T-eNB and reduces down transmitting power or stop downlink transfer, perhaps stop the uplink and downlink transmission, perhaps claim corresponding sub-frame allocation to T-eNB; " 1 " expression should be on corresponding subframe T-eNB do not stop uplink and downlink transmission when description scheme (hereinafter, all describe based on this kind method for expressing), perhaps corresponding subframe is not distributed to T-eNB.Can certainly be with opposite representing, be illustrated in such as " 0 " that T-eNB does not stop the uplink and downlink transmission on the corresponding subframe, " 1 " is illustrated in that T-eNB reduces down transmitting power or stops downlink transfer on the corresponding subframe, perhaps stops the uplink and downlink transmission.Such as for time division duplex (Time Division Duplexing, TDD) system, the TDD configuration is 0 time among the LTE, and described time division multiplexing assignment information can be that one-period is the sub-frame allocation bitmap of 70ms.Be that the multiplexing assignment information of described time division multiplexing can be the sub-frame allocation bitmap of fixed cycle (or claiming regular length).
Step 705. is considered the restriction of switching enhancing information when S-eNB and T-eNB scheduling in handoff procedure.
Concrete, for S-eNB, when S-eNB dispatches to the switching command (705.a) of UE transmission, consider to switch the restriction of enhancing information, such as, based on time division multiplexing assignment information shown in Figure 8 " sub-frame configuration bitmap ", when S-eNB dispatches described switching command, the described switching command of subframe scheduling that is shown " 0 " in sub-frame configuration bitmap table shown in Figure 8 namely reduces down transmitting power/or stop downlink transfer/or stop the described switching command of subframe scheduling of uplink and downlink transmission at S-eNB at T-eNB.
Concrete, for T-eNB, the restriction of considering to switch enhancing information during UE under the T-eNB scheduling T-eNB, such as, can be based on time division multiplexing assignment information shown in Figure 8 " sub-frame configuration bitmap ", during UE under the T-eNB scheduling T-eNB, in sub-frame configuration bitmap shown in Figure 8, be expressed as these UE of subframe scheduling of " 1 ", and the subframe that is expressed as in the drawings " 0 " stops to dispatch each UE under the T-eNB, even perhaps be expressed as each UE under subframes scheduling T-eNB of " 0 " at these, T-eNB reduces transmitting power in these subframes.
Step 706.UE switches to Target cell.
Performance of handoffs when above switching handling method can strengthen UE and switches between macrocell and LPN residential quarter reduces handoff failure probability and call drop probability, improves the user and experiences and network performance.
Further, when strengthening performance of handoffs, in order to reduce the scheduling restriction to the LPN residential quarter as far as possible, the switching of present embodiment step 704b strengthens information can also comprise switching enhancing information timer effective time, thereby, step 705S-eNB and T-eNB only strengthen information timer effective time in running time in described switching, need to consider to switch the restriction of enhancing information during scheduling.
Perhaps, when strengthening performance of handoffs, reduce the scheduling restriction to the LPN residential quarter as far as possible, described scheme can also be, the UE successful switch is behind Target cell, and T-eNB deletes described switching and strengthens information, need to be in the restriction of considering to switch enhancing information during UE under the after this T-eNB scheduling T-eNB.And the UE successful switch is behind Target cell, and T-eNB can send UE context release message (UE CONTEXT RELEASE) to S-eNB in the correlation technique, after S-eNB receives UE context release message, will discharge S-eNB and dispose all resources of this UE.
Embodiment two
In the present embodiment, UE moves to Zone switched between macrocell and the LPN residential quarter from macrocell, and perhaps UE moves to Zone switched between LPN residential quarter and the macrocell from the LPN residential quarter.There is not direct physical to be connected X2 interface between macrocell place source base station (S-eNB) and place, the LPN residential quarter LPN node (T-eNB), when therefore UE switches to T-eNB from S-eNB, hand off signaling between all S-eNB and the T-eNB must be transmitted via core network element, such as transmitting via Mobility Management Entity (Mobility Management Entity, MME).
As shown in Figure 9, the performance of handoffs when switching between macrocell and LPN residential quarter for strengthening UE, present embodiment is implemented as follows:
Step 901. is measured;
UE measures the signal quality of Serving cell and adjacent area.
Step 902.UE reporting measurement reports is to S-eNB;
UE is according to the measurement of step 901, and reporting measurement reports reports the signal quality of Target cell in the measurement report.
After step 903.S-eNB receives measurement report, make the handover decisions that switches to Target cell.
Step 904.S-eNB and T-eNB switch preparation, specifically comprise:
Step 904a.S-eNB sends switching demand (HANDOVER REQUIRED) to MME, except carrying unique identification UE the information of S-eNB and MME, also carries source base station and sends to the UE of target BS at the contextual information of source base station in the switching demand.According to correlation technique.UE comprises that at the contextual information of source base station UE is at RAB information (the Radio Access Bear of source base station, just referred to as RAB), UE is in the RRC of source base station configuration relevant information (specifically being encapsulated in the RRC Container item of information), also comprise the once information of the historical residential quarter of resident mistake (UE History Information) of UE, the described UE once information of the historical residential quarter of resident mistake comprises the CGI of cell-of-origin at least, the cell type of cell-of-origin, UE is in the information such as time of RRC connection status in the cell-of-origin, the cell type of cell-of-origin, be cell-of-origin cell size information, such as minimum residential quarter, small-cell, medium residential quarter, the types such as large residential quarter.
Step 904b.MME sends handover request to T-eNB.
After MME receives the switching demand that S-eNB sends, extract but do not resolve source base station and send to the UE of target BS at the contextual information of source base station, by handover request UE is transmitted to T-eNB at the contextual information of source base station.
After step 904c.T-eNB receives MME and gets handover request, make the decision of admitting UE, simultaneously, the UE that T-eNB sends according to S-eNB is the information of the historical residential quarter of resident mistake once, judge that described UE switches from source macrocell (type such as the cell-of-origin is large residential quarter) to come, be that described UE switches to the LPN residential quarter from macrocell, therefore make and switch the decision-making that strengthens.
Step 904d.T-eNB sends switching request response to MME.
According to correlation technique, carrying T-eNB in the switching request response is that RAB information and the T-eNB that UE disposes is other RRC configuration informations (specifically being encapsulated in the RRC Container item of information) of UE configuration.In addition, the switching of also carrying the T-eNB configuration in the switching request response strengthens information, and described switching strengthens concrete can being encapsulated among the above-mentioned RRC Container of information, also can be packaged into the item of information that is independent of RRC Container.Similar 704b, what described switching enhancing information was concrete can comprise the time division multiplexing assignment information, can also comprise and switch enhancing information timer effective time.
Step 904e.MME sends switching command (HANDOVER COMMAND) to S-eNB
After MME receives the handover request ack message that T-eNB sends, by switching command T-eNB is disposed RAB information to UE, the RRC configuration information, switch enhancing information etc. and send to S-eNB.
Step 905. is considered the restriction of switching enhancing information when S-eNB and T-eNB scheduling in handoff procedure.
Concrete, for S-eNB, when S-eNB dispatches to the switching command (step 905a) of UE transmission, the restriction of considering to switch enhancing information; Concrete, for T-eNB, the restriction of considering to switch enhancing information during UE under the T-eNB scheduling T-eNB, such as the UE under the subframe scheduling T-eNB that only in switching enhancing information, is expressed as " 1 ", and stop to dispatch each UE under the T-eNB in the subframe that is expressed as " 0 ", even perhaps be expressed as UE under subframes scheduling T-eNB of " 0 " at these, T-eNB reduces transmitting power in these subframes.
Step 906.UE switches to Target cell.
When above switching handling method can not have X2 interface between S-eNB and T-eNB (between source macro base station and Home eNodeB), strengthen the performance of handoffs when switching between macrocell and the LPN residential quarter, reduce handoff failure probability and call drop probability, improve the user and experience and network performance.
Need to prove, in the present embodiment, can be made switching to strengthen by T-eNB and make a strategic decision, also can be made by S-eNB and switch the enhancing decision-making.Similar, made switching by S-eNB and strengthen decision-making, also can by T-eNB according to UE once the information of the historical residential quarter of resident mistake make switching and strengthen decision-making.
Embodiment three
UE moves to Zone switched between macrocell and the LPN residential quarter from macrocell, and perhaps UE moves to Zone switched between LPN residential quarter and the macrocell from the LPN residential quarter.There is direct physical to be connected X2 interface between macrocell place source base station (S-eNB) and place, the LPN residential quarter LPN node (T-eNB).
As shown in figure 10, the performance of handoffs when switching between macrocell and LPN residential quarter for strengthening UE, present embodiment is implemented as follows:
Step 1001.UE is to the indication of S-eNB transmission near the LPN residential quarter;
The mechanism such as positional information of the LPN residential quarter of once accessing that UE preserves by locating information or according to UE find to have approached a LPN residential quarter, and UE sends to S-eNB and indicates near the LPN residential quarter.
Step 1002.S-eNB sends the request of avoiding of disturbing to T-eNB, perhaps claims to switch to strengthen request.
Described interference avoids request/switching to strengthen request, also can realize by the message on the existing X2 interface of expansion, namely increase item of information in existing X2 interface message and realize, avoid request/switching enhancing solicited message item to realize such as asking to increase in the message such as (MOBILITY CHANGE REQUEST) message, resource updates request (RESOURCE STATUS REQUEST) message in the mobility change of existing X2 interface to disturb.
Step 1003.T-eNB sends the information of avoiding of disturbing to S-eNB, perhaps claims to switch enhancing information.
Information/switching enhancing information is avoided in described interference, similar embodiment one, and concrete can be the time division multiplexing assignment information of T-eNB configuration.
Information/switching enhancing information is avoided in described interference, also can realize by the message on the expansion X2 interface, namely increase item of information in existing X2 interface message and realize, change to increase to disturb in the message such as responding (MOBILITY CHANGE ACKNOWLEDGE) message, resource updates response (RESOURCE STATUS RESPONSE) message such as the mobility at existing X2 interface and avoid item of information/switching to strengthen the item of information realization.
Step 1004.S-eNB and T-eNB consider to disturb the restriction of avoiding information/switching enhancing information in follow-up scheduling process.Concrete, S-eNB to the scheduling of described UE, can consider to disturb the restriction of avoiding information/switching enhancing information before described UE switches to target LPN residential quarter; T-eNB to the scheduling of UE under the T-eNB, can consider to disturb the restriction of avoiding information/switching enhancing information before described UE successful switch arrives target LPN residential quarter.
Concrete, in the handoff procedure of the follow-up UE of present embodiment, S-eNB can consider to disturb the restriction of avoiding information/switching enhancing information to the scheduling of described UE, comprising:
Step 1004a.UE measures the LPN residential quarter, when the signal quality of LPN residential quarter satisfies the report condition of S-eNB configuration, and reporting measurement reports.
The UE reporting measurement reports, need the S-eNB scheduling to send the ascending resource of described measurement report, the dispatch of dispatching the ascending resource that sends described measurement report for fear of S-eNB is disturbed, when S-eNB sends described dispatch, considers to disturb the restriction of avoiding information/switching enhancing information.Such as, if the interference of present embodiment avoids information/switching enhancing information shown in the time division multiplexing assignment information of Fig. 8, when then S-eNB sends described dispatch, at the described switching command of subframe scheduling that is shown " 0 " in sub-frame configuration bitmap table shown in Figure 8, namely S-eNB reduces down transmitting power/or stop downlink transfer/or stop the described switching command of subframe scheduling of uplink and downlink transmission at T-eNB.
Step 1004d.S-eNB sends switching command to UE.During S-eNB scheduling switching command, consider to disturb the restriction of avoiding information/switching enhancing information, embodiment is with aforementioned step 705.
Step 1005 and 1006. is with aforementioned embodiment one.
Performance of handoffs when above switching handling method can strengthen UE and switches between macrocell and LPN residential quarter reduces handoff failure probability and call drop probability, improves the user and experiences and network performance.
Embodiment four
When strengthening performance of handoffs, in order to reduce the scheduling restriction to S-eNB and LPN residential quarter as far as possible, present embodiment has also proposed to disturb avoids information/switching enhancing information canceling method.
As shown in figure 11, in the present embodiment, after UE switches to T-eNB, perhaps, T-eNB sends to disturb in step 1003 and avoids information/switching enhancing information after afterwards a period of time, T-eNB sends cancellation to S-eNB and disturbs the notice (step 1101) of avoiding information/switching enhancing information, and the after this scheduling of T-eNB and S-eNB does not need to consider that described interference avoids the restriction of information/switching enhancing information again.Perhaps, the interference that T-eNB sends to S-eNB in the step 1003 avoids information/switchings enhancing information can also comprise that interference avoids information/switching enhancing information timer effective time, and the scheduling of S-eNB and T-eNB no longer needs to consider to disturb the restriction of avoiding information/switching enhancing information behind this timer expiry.
Embodiment five
Be deployed with the LPN node in the macrocell coverage area, have direct physical to be connected (X2 interface) between macrocell place source base station and the LPN node.
When LPN node and source macro base station were set up X2 interface, perhaps LPN node and source macro base station had been set up after the X2 interface, and the LPN node sends the information/switching enhancing information of avoiding of disturbing to the source macro base station.Described interference avoids information/switching enhancing information to be specially the time division multiplexing assignment information of LPN node configuration.
LPN node and source macro base station consider to disturb the restriction of avoiding information/switching enhancing information in follow-up scheduling process.
Concrete, the source macro base station considers during this UE of follow-up scheduling that described interference avoids the restriction of information/switching enhancing information after receiving certain UE and reporting the indication near the LPN residential quarter of source macro base station.Optimize, the source macro base station is after a period of time near the indication of LPN residential quarter that receives that this UE reports, if this UE is not switched to the LPN residential quarter; After perhaps this UE is switched to the LPN residential quarter, when dispatching this UE, cancels the source macro base station restriction that information/switching enhancing information is avoided in described interference.
Concrete, the LPN node sends described interference to the source macro base station and avoids after information/switchings enhancing information, when dispatching the UE under the LPN, considers that described interference avoids the restriction of information/switching enhancing information.
In addition, also provide a kind of switching processing system in the embodiment of the invention, this system mainly comprises the following functional module in the base station:
The handover information sending module is used for sending handover information to source base station;
The handover information receiver module is used for the handover information that the receiving target base station sends;
Schedule process module is used for dispatching according to described handover information.
Further, described system also comprises:
The handover request module for before initiating in switching or in the switching set-up procedure, is avoided solicited message to target BS transmission switching enhancing solicited message or interference, specifically comprises:
After receiving the information near the Target cell under the target BS control that UE reports, send to switch to described target BS and strengthen solicited message or solicited message is avoided in interference;
When being to be switched UE initiation switching flow, in handover request or handoff requirement message, avoid solicited message to target BS transmission switching enhancing solicited message or interference.
Further, the switching that described handover request module sends strengthens solicited message or solicited message is avoided in interference, and comprising: described UE is the information of the historical residential quarter of resident mistake once.
Further, described handover information sending module is used for, and after receiving described switching that described handover request module sends and strengthening solicited message or interference and avoid solicited message, sends described handover information to described source base station.
Further, the described handover information that described handover information sending module sends comprises and switches enhancing information or information is avoided in interference that described switching strengthens information or interference avoids information to comprise: the time division multiplexing assignment information of target BS configuration.
Further, described schedule process module is used for:
Time division multiplexing assignment information according to described target BS configuration, reduce down transmitting power or stop to be switched UE under the described source base station of time scheduling of downlink transfer at described target BS, perhaps stop to be switched UE under the described source base station of time scheduling of uplink and downlink transmission at described target BS;
Perhaps, according to the time division multiplexing assignment information of configuration, the UE under the described target BS is dispatched distributing in the time of described target BS, within the non-time of distributing to described target BS, stop the UE under the described target BS is dispatched.
Further, the described handover information of described handover information sending module transmission comprises: switch and strengthen timer effective time;
Described schedule process module only in described switching strengthens the running time of timer effective time, is dispatched according to described handover information.
Further, described handover information sending module also is used for, and sends handover information cancellation message to source base station;
Described schedule process module is used for, and sends described handover information cancellation message and/or after the handover information receiver module receives described handover information cancellation message, is not subjected to the restriction of described handover information when scheduling at described handover information sending module.
Further, described schedule process module is used for, and behind target BS, is not subjected to the restriction of described handover information at described UE successful switch when scheduling.
It below only is preferred case study on implementation of the present invention; be not limited to the present invention; the present invention also can have other various embodiments; in the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art can make according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and be carried out by calculation element, and in some cases, can carry out step shown or that describe with the order that is different from herein, perhaps they are made into respectively each integrated circuit modules, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
Claims (22)
1. a switching handling method is characterized in that,
Target BS sends handover information to source base station;
Described source base station and/or described target BS are dispatched according to described handover information.
2. the method for claim 1 is characterized in that, described method also comprises:
Described source base station is avoided solicited message to described target BS transmission switching enhancing solicited message or interference before switching is initiated or in switching set-up procedure.
3. the method for claim 1 is characterized in that,
Described handover information comprises and switches enhancing information or information is avoided in interference that described switching strengthens information or interference avoids information to comprise: the time division multiplexing assignment information of described target BS configuration.
4. method as claimed in claim 2 is characterized in that,
Described source base station was avoided solicited message to described target BS transmission switching enhancing solicited message or interference before switching initiation, specifically comprise:
After described source base station was received the information near the lower Target cell of target BS control that subscriber equipment (UE) reports, described source base station sent to described target BS and switches the enhancing solicited message or solicited message is avoided in interference.
5. method as claimed in claim 2 is characterized in that,
Described source base station is avoided solicited message to described target BS transmission switching enhancing solicited message or interference in switching set-up procedure, specifically comprise:
Described source base station is when being to be switched UE initiation switching flow, and described source base station is avoided solicited message to described target BS transmission switching enhancing solicited message or interference in handover request or handoff requirement message.
6. method as claimed in claim 5 is characterized in that,
Described switching strengthens solicited message or interference avoids solicited message to be: described UE is the information of the historical residential quarter of resident mistake (UE History Information) once.
7. such as claim 2,4, each described method of 5 or 6, it is characterized in that,
Described target BS sends described handover information to described source base station after receiving described switching and strengthening solicited message or interference and avoid solicited message.
8. method as claimed in claim 3 is characterized in that,
The sub-frame allocation message bit pattern that described time division multiplexing assignment information is the fixed cycle.
9. such as claim 3 or 8 described methods, it is characterized in that,
Described source base station is dispatched according to described handover information, specifically comprises:
Described source base station is according to the time division multiplexing assignment information of described target BS configuration, reduce down transmitting power or stop to be switched UE under the described source base station of time scheduling of downlink transfer at described target BS, perhaps stop to be switched UE under the described source base station of time scheduling of uplink and downlink transmission at described target BS.
10. such as claim 3 or 8 described methods, it is characterized in that,
Described target BS is dispatched according to described handover information, specifically comprises:
Described target BS is according to the time division multiplexing assignment information of configuration, UE under the described target BS is dispatched distributing in the time of described target BS, within the non-time of distributing to described target BS, stop the UE under the described target BS is dispatched.
11. such as claim 1,2 or 3 described methods, it is characterized in that,
Described handover information comprises that switching strengthens timer effective time;
Described source base station and/or described target BS only in described switching strengthens the running time of timer effective time, are dispatched according to described handover information.
12. such as claim 1,2 or 3 described methods, it is characterized in that described method also comprises:
Described target BS sends handover information cancellation message to described source base station;
Described target BS is not subjected to the restriction of described handover information when scheduling after sending described handover information cancellation message; And/or described source base station is not subjected to the restriction of described handover information when scheduling after receiving described handover information cancellation message.
13. such as claim 1,2 or 3 described methods, it is characterized in that,
Described UE successful switch is behind target BS, and described source base station and/or described target BS are not subjected to the restriction of described handover information when scheduling.
14. a switching processing system is characterized in that, described system comprises in the base station:
The handover information sending module is used for sending handover information to source base station;
The handover information receiver module is used for the handover information that the receiving target base station sends;
Schedule process module is used for dispatching according to described handover information.
15. system as claimed in claim 14 is characterized in that, described system also comprises:
The handover request module for before initiating in switching or in the switching set-up procedure, is avoided solicited message to target BS transmission switching enhancing solicited message or interference, specifically comprises:
After receiving the information near the Target cell under the target BS control that UE reports, send to switch to described target BS and strengthen solicited message or solicited message is avoided in interference;
When being to be switched UE initiation switching flow, in handover request or handoff requirement message, avoid solicited message to target BS transmission switching enhancing solicited message or interference.
16. system as claimed in claim 15 is characterized in that,
The switching that described handover request module sends strengthens solicited message or solicited message is avoided in interference, and comprising: described UE is the information of the historical residential quarter of resident mistake once.
17. system as claimed in claim 15 is characterized in that,
Described handover information sending module is used for, and after receiving described switching that described handover request module sends and strengthening solicited message or interference and avoid solicited message, sends described handover information to described source base station.
18. system as claimed in claim 17 is characterized in that,
The described handover information that described handover information sending module sends comprises and switches enhancing information or information is avoided in interference that described switching strengthens information or interference avoids information to comprise: the time division multiplexing assignment information of target BS configuration.
19. system as claimed in claim 18 is characterized in that,
Described schedule process module is used for:
Time division multiplexing assignment information according to described target BS configuration, reduce down transmitting power or stop to be switched UE under the described source base station of time scheduling of downlink transfer at described target BS, perhaps stop to be switched UE under the described source base station of time scheduling of uplink and downlink transmission at described target BS;
Perhaps, according to the time division multiplexing assignment information of configuration, the UE under the described target BS is dispatched distributing in the time of described target BS, within the non-time of distributing to described target BS, stop the UE under the described target BS is dispatched.
20. such as claim 14,18 or 19 described systems, it is characterized in that,
The described handover information that described handover information sending module sends comprises: switch and strengthen timer effective time;
Described schedule process module only in described switching strengthens the running time of timer effective time, is dispatched according to described handover information.
21. such as claim 14,18 or 19 described systems, it is characterized in that,
Described handover information sending module also is used for, and sends handover information cancellation message to source base station;
Described schedule process module is used for, and sends described handover information cancellation message and/or after the handover information receiver module receives described handover information cancellation message, is not subjected to the restriction of described handover information when scheduling at described handover information sending module.
22. such as claim 14,18 or 19 described systems, it is characterized in that,
Described schedule process module is used for, and behind target BS, is not subjected to the restriction of described handover information at described UE successful switch when scheduling.
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| CN111800835A (en) * | 2019-08-14 | 2020-10-20 | 维沃移动通信有限公司 | Switching configuration method, network device, terminal device and storage medium |
| CN111800835B (en) * | 2019-08-14 | 2022-03-18 | 维沃移动通信有限公司 | Switching configuration method, network device, terminal device and storage medium |
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| WO2012155609A1 (en) | 2012-11-22 |
| CN102932836B (en) | 2017-11-10 |
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