CN103782628A - Communication method, apparatus and system - Google Patents

Abstract

The present invention provides a communication method, apparatus and system. The method comprises: a base station receives a wireless resource control RRC connection reestablishment request sent by user equipment UE, wherein the RRC connection reestablishment request is used for requesting the reestablishment to a first cell controlled by the base station; if the context of the UE is not stored in the base station, the base station obtains the context of the UE from a mobile management entity MME; the base station sends an RRC connection reestablishment setup message to the UE, and receives an RRC connection reestablishment completion message sent by the UE; and the base station sends a handover command to the MME. The present invention solves the problem that the success rate of RRC connection reestablishment by user equipment is low in the prior art.

Description

Communication means, equipment and system

Technical field

The present invention relates to the communication technology, relate in particular to a kind of communication means, equipment and system.

Background technology

Long evolving system (Long Term Evolution, LTE) system comprises evolution base station (Evolved NodeB, eNB) and evolution packet switching center (Evolved Packet Core, EPC).Wherein, eNB is connected by S1 interface with EPC, between eNB, connects by X2 interface.S1 interface and X2 interface are all logic interfacing.An EPC can manage one or more eNB, and an eNB also can be controlled by multiple EPC, and an eNB can manage one or more communities (cell).

In prior art, subscriber equipment (User Equipment, UE) while existing X2 link and X2 link normal between the source eNB of target eNB and this UE, the target eNB of this UE can be obtained to the source eNB that changes UE the context of this UE, to improve the success rate of Radio Resource control (Radio Resource Control, RRC) connection re-establishment.If there is not normal X2 link between the source eNB of the target eNB of this UE and this UE, the RRC connection re-establishment success rate of this UE is very low.

Summary of the invention

The embodiment of the present invention provides a kind of communication means, equipment and system, in order to improve the success rate of RRC connection re-establishment of UE, thereby improves network performance.

First aspect, the embodiment of the present invention provides a kind of communication means, comprising:

Base station receives the RRC connection reconstruction request message that user equipment (UE) sends, and described RRC connection reconstruction request message is for asking to re-establish the first community to being controlled by described base station;

If the context of described UE is not preserved in described base station, described base station obtains the context of described UE from MME;

Described base station sends RRC connection reconstruction to described UE and sets up message, and receives the RRC connection reconstruction that described UE sends and complete message;

Described base station sends handoff notification message to described MME.

In conjunction with first aspect, in the possible execution mode of the first of first aspect, the context that described base station obtains described UE from MME comprises:

Described base station sends the first request message to described MME, described the first request message is for the context of UE described in acquisition request, and described the first request message carries the mark of the user ID of described UE, the mark of described the first community, the mark of described base station and the source base station of described UE;

Described base station receives the first feedback message that described MME sends, and described the first feedback message carries the context of described UE.

In conjunction with the possible execution mode of the first of first aspect, in the possible execution mode of the second of first aspect, described the first request message also carries following at least one:

The first authorization information, for verifying the contextual accuracy of described UE; And

The mark of the cell-of-origin of described UE.

In conjunction with the possible execution mode of the first of first aspect, first aspect, in the third possible execution mode of first aspect, the context of described UE is that described MME obtained from the source base station of described UE before sending described the first feedback message.

In conjunction with first aspect first to the third possible execution mode, in the 4th kind of possible execution mode of first aspect, described method also comprises:

When described base station sends the first request message to MME, described base station initiated timer;

If when described base station receives described the first feedback message, described timer is not overtime, and described base station sends RRC connection reconstruction to described UE and sets up message.

In conjunction with the 4th kind of possible execution mode of first aspect, in the 5th kind of possible execution mode of first aspect, described method also comprises:

If when described base station receives described the first feedback message, described timer is not overtime, and described base station sends the acknowledge message of described the first feedback message of response to described MME.

In conjunction with first to the 5th kind of possible execution mode of first aspect, first aspect, in the 6th kind of possible execution mode of first aspect, if the context of described UE is not preserved in described base station, described base station judges whether the Neighboring Cell List of described base station preservation comprises the cell-of-origin of described UE; If the cell-of-origin that the Neighboring Cell List that preserve described base station comprises described UE, described base station obtains the context of described UE from MME.

Second aspect, the embodiment of the present invention provides another kind of communication means, comprising:

MME knows that the first base station requests obtains the context of user equipment (UE);

The context of described UE is offered described the first base station by described MME;

Described MME receives the handoff notification message that described the first base station sends;

Wherein, the Target cell of described UE transmission RRC reconstruction request message is controlled in described the first base station.

In conjunction with second aspect, in the possible execution mode of the first of second aspect, described MME knows that the context that described the first base station requests is obtained UE comprises:

Described MME receives the first request message that described the first base station sends, described the first request message is for the context of UE described in acquisition request, and described the first request message carries the mark of mark, the mark of described the first base station and the source base station of described UE of the user ID of described UE, described the first community.

In conjunction with the possible execution mode of the first of second aspect, in the possible execution mode of the second of second aspect, described the first request message also carries following at least one:

The first authorization information, for verifying the contextual accuracy of described UE; And

The mark of the cell-of-origin of described UE.

In conjunction with the first or the possible execution mode of the second of second aspect, second aspect, in the third possible execution mode of second aspect, described MME also comprises before the context of described UE is offered to described the first base station:

Described MME sends the second request message to the source base station of described UE, described the second request message is for the context of UE described in acquisition request, and described the second request message carries the mark of mark, the mark of described the first base station and the source base station of described UE of the Target cell of the user ID of described UE, described UE.

In conjunction with the third possible execution mode of second aspect, in the 4th kind of possible execution mode of second aspect, described the second request message also carries following at least one:

The first authorization information, for verifying the contextual accuracy of described UE; And

The mark of the cell-of-origin of described UE.

In conjunction with first to fourth kind of second aspect, second aspect possible execution mode, in the 5th kind of possible execution mode of second aspect, the context that described MME obtains described UE from the source base station of described UE comprises: the context of the described UE that the source base station that described another MME of MME process receives described UE provides;

Wherein, described MME is described MME corresponding to the first base station, MME corresponding to source base station that described another MME is described UE.

The third aspect, the embodiment of the present invention provides another communication means, comprising:

The context of MME acquisition request user equipment (UE) is known in base station;

The context of described UE is offered described MME by described base station;

Described base station receives the switching command that described MME sends; Wherein, the cell-of-origin of described UE is controlled in described base station.

In conjunction with the third aspect, in the possible execution mode of the first of the third aspect, described base station knows that the context of MME acquisition request UE comprises:

Described base station receives the second request message that described MME sends, described the second request message is for the context of UE described in acquisition request, and described the second request message carries the mark of target BS and the mark of described base station of the mark of the Target cell of the user ID of described UE, described UE, described UE.

In conjunction with the possible execution mode of the first of the third aspect, the third aspect, in the possible execution mode of the second of the third aspect, described the second request message also carries following at least one:

The first authorization information, for verifying the contextual accuracy of described UE; And

The mark of the cell-of-origin of described UE.

In conjunction with the possible execution mode of the second of the third aspect, in the third possible execution mode of the third aspect, described base station also comprises before the context of described UE is offered to described MME:

The context of described UE is inquired about in described base station at described inside of base station;

The contextual accuracy of described UE is verified in described base station according to described the first authorization information.

Fourth aspect, the embodiment of the present invention provides a kind of base station, comprising: transceiver, memory and processor;

The RRC connection reconstruction request message that described transceiver sends for receiving user equipment (UE), described RRC connection reconstruction request message is for asking to re-establish the first community to being controlled by described base station;

Described processor is used for judging whether described memory preserves the context of described UE, and in the time that described memory is not preserved the context of described UE, triggers described transceiver;

Described transceiver, also for when the triggering that is subject to described processor, obtains the context of described UE from MME;

Described transceiver also, for after described MME obtains the context of described UE, sends RRC connection reconstruction to described UE and sets up message, and the RRC connection reconstruction that receives described UE transmission completes message, and sends handoff notification message to described MME.

In conjunction with fourth aspect, in the possible execution mode of the first of fourth aspect, described transceiver is for sending the first request message to described MME, described the first request message is for the context of UE described in acquisition request, and described the first request message carries the mark of the user ID of described UE, the mark of described the first community, the mark of described base station and the source base station of described UE;

The first feedback message that described transceiver also sends for receiving described MME, described the first feedback message carries the context of described UE.

In conjunction with the possible execution mode of the first of fourth aspect, in the possible execution mode of the second of fourth aspect, described the first request message also carries following at least one:

The first authorization information, for verifying the contextual accuracy of described UE; And

The mark of the cell-of-origin of described UE.

In conjunction with the possible execution mode of the first of fourth aspect, fourth aspect, in the third possible execution mode of fourth aspect, the context of described UE is that described MME obtained from the source base station of described UE before sending described the first feedback message.

In conjunction with fourth aspect first to the third possible execution mode, in the 4th kind of possible execution mode of fourth aspect, described base station also comprises timer;

Described transceiver also when sending the first request message to MME, triggers described timer and starts, and if described transceiver while receiving described the first feedback message, described timer is not overtime, sends RRC connection reconstruction to described UE and sets up message.

In conjunction with the 4th kind of possible execution mode of fourth aspect, in the 5th kind of possible execution mode of fourth aspect, described transceiver also for: if when described transceiver receives described the first feedback message, described timer is not overtime, sends the acknowledge message of described the first feedback message of response to described MME.

In conjunction with first to the 5th kind of possible execution mode of fourth aspect, fourth aspect, in the 6th kind of possible execution mode of fourth aspect, described processor also for: in the time that described memory is not preserved the context of described UE, judge whether the Neighboring Cell List of described memory preservation comprises the cell-of-origin of described UE, and the Neighboring Cell List of preserving when described memory comprise described UE cell-of-origin time, trigger described transceiver.

The 5th aspect, the embodiment of the present invention provides a kind of MME, comprising: receiver and transmitter;

Described receiver obtains the context of user equipment (UE) for knowing the first base station requests;

Described transmitter is for offering described the first base station by the context of described UE;

The handoff notification message that described receiver also sends for receiving described the first base station;

Wherein, the Target cell of described UE transmission RRC reconstruction request message is controlled in described the first base station.

In conjunction with the 5th aspect, in the possible execution mode of the first aspect the 5th, the first request message that described receiver sends for receiving described the first base station, described the first request message is for the context of UE described in acquisition request, and described the first request message carries the mark of mark, the mark of described the first base station and the source base station of described UE of the user ID of described UE, described the first community.

In conjunction with the possible execution mode of the first of the 5th aspect, in the possible execution mode of the second aspect the 5th, described the first request message also carries following at least one:

The first authorization information, for verifying the contextual accuracy of described UE; And

The mark of the cell-of-origin of described UE.

In conjunction with the first or the possible execution mode of the second of the 5th aspect, the 5th aspect, in the third possible execution mode aspect the 5th, described transmitter is also for sending the second request message to the source base station of described UE, described the second request message is for the context of UE described in acquisition request, and described the second request message carries the mark of mark, the mark of described the first base station and the source base station of described UE of the Target cell of the user ID of described UE, described UE.

In conjunction with the third possible execution mode of the 5th aspect, in the 4th kind of possible execution mode aspect the 5th, described the second request message also carries following at least one:

The first authorization information, for verifying the contextual accuracy of described UE; And

The mark of the cell-of-origin of described UE.

In conjunction with first to fourth kind of possible execution mode of the 5th aspect, the 5th aspect, in the 5th kind of possible execution mode aspect the 5th,

Described receiver is for the context of the described UE that receives the source base station of described UE through another MME and provide;

Wherein, described MME is described MME corresponding to the first base station, MME corresponding to source base station that described another MME is described UE.

The 6th aspect, the embodiment of the present invention provides another kind of base station, comprising: receiver and transmitter,

Described receiver is for knowing the context of MME acquisition request user equipment (UE);

Described transmitter is for offering described MME by the context of described UE;

The switching command that described receiver also sends for receiving described MME; Wherein, the cell-of-origin of described UE is controlled in described base station.

In conjunction with the 6th aspect, in the possible execution mode of the first aspect the 6th,

The second request message that described receiver sends for receiving described MME, described the second request message is for the context of UE described in acquisition request, and described the second request message carries the mark of target BS and the mark of described base station of the mark of the Target cell of the user ID of described UE, described UE, described UE.

In conjunction with the possible execution mode of the first of the 6th aspect, the 6th aspect, in the possible execution mode of the second aspect the 6th, described the second request message also carries following at least one:

The first authorization information, for verifying the contextual accuracy of described UE; And

The mark of the cell-of-origin of described UE.

In conjunction with the possible execution mode of the second of the 6th aspect, in the third the possible execution mode aspect the 6th, also comprise processor and memory;

Described processor for inquiring about the context of described UE in described memory; And verify the contextual accuracy of described UE according to described the first authorization information.

The 7th aspect, the embodiment of the present invention there is provided a system comprising the base station that a fourth aspect of the present invention provides, the MME that the 5th aspect provides, base station and the subscriber equipment that the 6th aspect provides.

Communication means, equipment and system that the embodiment of the present invention provides, mobile management entity (Mobility Management Entity corresponding to this base station can be passed through in base station under the Target cell that UE asks to re-establish, MME) obtain the context of this UE, improve the success rate of the RRC connection re-establishment of this UE, and above-mentioned base station is without setting up X2 link with the contextual base station of preserving this UE.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

The flow chart of the communication means that Fig. 1 provides for one embodiment of the invention;

The flow chart of the communication means that Fig. 2 provides for another embodiment of the present invention;

The flow chart of the communication means that Fig. 3 provides for another embodiment of the present invention;

The flow chart of the communication means that Fig. 4 provides for another embodiment of the present invention;

The flow chart of the communication means that Fig. 5 provides for another embodiment of the present invention;

The flow chart of the communication means that Fig. 6 provides for another embodiment of the present invention;

The structural representation of the equipment that Fig. 7 provides for another embodiment of the present invention;

The structural representation of the equipment that Fig. 8 provides for another embodiment of the present invention;

The structural representation of the equipment that Fig. 9 provides for another embodiment of the present invention;

The structural representation of the equipment that Figure 10 provides for another embodiment of the present invention;

The structural representation of the equipment that Figure 11 provides for another embodiment of the present invention.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.

The techniques described herein may be used in various communication systems, for example current 2G, 3G communication system and next generation communication system, for example global system for mobile communications (GSM, Global System for Mobile communications), code division multiple access (CDMA, Code Division Multiple Access) system, time division multiple access (TDMA, Time Division Multiple Access) system, Wideband Code Division Multiple Access (WCDMA) (WCDMA, Wideband Code Division Multiple Access Wireless), frequency division multiple access (FDMA, Frequency Division Multiple Addressing) system, OFDM (OFDMA, Orthogonal Frequency-Division Multiple Access) system, Single Carrier Frequency Division Multiple Access (SC-FDMA) system, GPRS (GPRS, General Packet Radio Service) system, Long Term Evolution (LTE, Long Term Evolution) system, and other these type of communication systems.

The subscriber equipment relating in the application, can be wireless terminal, and above-mentioned wireless terminal is to point to user to provide the equipment of voice and/or data connectivity, has the portable equipment of wireless connecting function or is connected to other treatment facilities of radio modem.Wireless terminal can be through wireless access network (for example, RAN, Radio Access Network) communicate with one or more core net, wireless terminal can be mobile terminal, as mobile phone (or being called " honeycomb " phone) with there is the computer of mobile terminal, for example, can be portable, pocket, hand-hold type, mobile device built-in computer or vehicle-mounted, they and wireless access network exchange language and/or data.For example, Personal Communications Services (PCS, Personal Communication Service) phone, cordless telephone, Session Initiation Protocol phone, wireless local loop (WLL, Wireless Local Loop) stand, the equipment such as personal digital assistant (PDA, Personal Digital Assistant).Wireless terminal also can be called system, subscriber unit (Subscriber Unit), subscriber station (Subscriber Station), mobile radio station (Mobile Station), travelling carriage (Mobile), distant station (Remote Station), access point (Access Point), remote terminal (Remote Terminal), access terminal (Access Terminal), user terminal (User Terminal), user agent (User Agent), subscriber equipment (User Device) or subscriber's installation (User Equipment).

The base station (for example, access point) relating in the application can refer in Access Network aloft on interface by the equipment of one or more sectors and wireless terminal communications.Base station can be used for the air frame of receiving and IP grouping mutually to change, and as the router between wireless terminal and the remainder of Access Network, wherein the remainder of Access Network can comprise Internet protocol (IP) network.Base station is the attribute management of tunable to air interface also.For example, base station can be the base station (BTS in GSM or CDMA, Base Transceiver Station), also can be the base station (NodeB) in WCDMA, can also be evolved base station (NodeB or eNB or the e-NodeB in LTE, evolutional Node B), the application does not limit.

The RRC connection reconstruction flow process relating in the application, specifically be applicable to UE and RLF(radio link failure detected), or, UE handoff failure, or UE is from the UMTS land wireless access of EURTA(evolution, E-UTRA, Evolved Universal Terrestrial Radio Access) move to other system failure (mobility from E-UTRA failure), or, completeness check failure (integrity check failure), or the RRC of UE connects the various enforcement scenes such as reconfiguration failure (RRC connection reconfiguration failure).

The flow chart of the communication means that Fig. 1 provides for one embodiment of the invention, as shown in Figure 1, when the executive agent of the step in the present embodiment can carry out RRC connection reconstruction for UE, the base station under reconstructed object community.Above-mentioned communication means specifically comprises the steps.

S101: above-mentioned base station receives the RRC connection reconstruction request message that UE sends, above-mentioned RRC connection reconstruction request message is for asking to re-establish the first community to being controlled by above-mentioned base station;

For example, UE, in the time carrying out RRC connection reconstruction, can first select by community conventionally, selects a suitable Target cell, then initiates the request of RRC connection reconstruction to the base station under Target cell.Above-mentioned base station receives after the RRC connection reconstruction request message of UE transmission, can be according to message content, and by the RRC connection re-establishment of UE, to the first community of being controlled by above-mentioned base station, above-mentioned the first community is the Target cell of the RRC connection reconstruction of UE selection.

S102: if the context of above-mentioned UE is not preserved in above-mentioned base station, above-mentioned base station obtains the context of above-mentioned UE from MME;

For example, above-mentioned base station receives after the RRC connection reconstruction request message of above-mentioned UE transmission, judge whether above-mentioned base station preserves the context of above-mentioned UE, if the context of above-mentioned UE is not preserved in definite above-mentioned base station, above-mentioned base station obtains the context of above-mentioned UE from the MME under above-mentioned base station.For example, base station obtains the contextual concrete mode of above-mentioned UE from MME: can be that above-mentioned base station indication MME obtains context to the source base station under UE, send to above-mentioned base station; Or MME regularly receives the context of all UE that control under the above-mentioned source base station that the source base station under UE sends, in the time having base station to ask to get, offer corresponding base station; Here the context that how MME is obtained to UE does not limit.In the embodiment of the present invention, receiving in base station after the RRC connection reconstruction request message of UE transmission, is not in picture prior art, asks for context by above-mentioned base station by the source base station under X2 chain road direction UE, but by S1 link, obtain the context of above-mentioned UE via MME.

When base station gets after the context of above-mentioned UE, can continue to carry out UE and for example re-establish, to the reconstruction flow process of the first community of being controlled by above-mentioned base station, step 103 and 104.

S103: above-mentioned base station sends RRC connection reconstruction to above-mentioned UE and sets up message, and receive the RRC connection reconstruction that above-mentioned UE sends and complete message;

For example, UE re-establishes to the reconstruction flow process of the first community of being controlled by base station and is: first above-mentioned base station sends RRC connection reconstruction to above-mentioned UE and set up message, to inform that Target cell that above-mentioned UE will switch is as the first community; Above-mentioned UE receives RRC connection reconstruction and sets up after message, starts and re-establishes flow process; Above-mentioned UE re-establishes to Target cell, send RRC connection reconstruction to above-mentioned base station and complete message, with inform above-mentioned base station this to re-establish flow performing complete.

S104: above-mentioned base station sends handoff notification message to above-mentioned MME.

For example, from above-mentioned MME gets the context of above-mentioned UE, can also send handoff notification message to above-mentioned MME, to indicate MME that the data service of above-mentioned UE is switched to above-mentioned base station in above-mentioned base station.

The communication means that the present embodiment provides, the context that the base station under the Target cell that UE asks to re-establish can obtain by MME corresponding to above-mentioned base station above-mentioned UE, has improved the success rate of the RRC connection re-establishment of above-mentioned UE.

The flow chart of the communication means that Fig. 2 provides for another embodiment of the present invention, as shown in Figure 2, when the executive agent of the step in the present embodiment can carry out RRC connection reconstruction for UE, MME corresponding to base station under reconstructed object community, above-mentioned communication means specifically comprises the steps.

S201:MME knows that the first base station requests obtains the context of UE;

For example, UE, in the time carrying out RRC connection reconstruction, can first select by community conventionally, selects a suitable Target cell, then initiates to send RRC connection reconstruction request message to the base station under Target cell.Above-mentioned base station receives after the RRC connection reconstruction request message of above-mentioned UE transmission, can be according to message content, and the MME under above-mentioned base station sends a request message, and obtains the context of UE so that above-mentioned MME is known the first base station requests.

It should be noted that, the first base station in the present embodiment be UE re-establish to Target cell under base station, can be the base station as each step executive agent in embodiment as shown in Figure 1, the Target cell that UE re-establishes can be the first community in embodiment as shown in Figure 1.

The context of UE is offered the first base station by S202:MME;

MME knows that the first base station requests obtains after the context of UE, and the context of above-mentioned UE is offered to above-mentioned the first base station; For example, MME offers the context of above-mentioned UE the concrete mode of above-mentioned the first base station: can be that MME knows that the first base station requests obtains after the context of UE, the source base station under UE obtains the context of above-mentioned UE, and sends to the first base station; Or MME regularly receives the context of all UE that control under the above-mentioned base station that the source base station under UE sends, in the time having base station to ask to get, offer corresponding base station; Here the context that how MME is obtained to UE does not limit, in the present embodiment, receive in the first base station after the RRC connection reconstruction request message of UE transmission, not in picture prior art, ask for context by above-mentioned the first base station by the source base station under X2 chain road direction UE, but by S1 link, obtain the context of above-mentioned UE by MME.When base station gets after the context of above-mentioned UE, just can continue to carry out follow-up UE and re-establish to the reconstruction flow process of the first community of being controlled by above-mentioned the first base station (Target cell that UE rebuilds).In said process, MME can carry out following steps.

It should be noted that, the source base station under the UE that this step is given an example can be the base station as each step executive agent in embodiment as shown in Figure 3.

S203: above-mentioned MME receives the handoff notification message that above-mentioned the first base station sends; Wherein, the Target cell of above-mentioned UE transmission RRC reconstruction request message is controlled in above-mentioned the first base station;

Optionally, above-mentioned MME receives the handoff notification message that above-mentioned the first base station sends after above-mentioned MME gets the context of above-mentioned UE, and the data service of above-mentioned UE is switched to above-mentioned the first base station.

In the communication means that the present embodiment provides, when UE request re-establishes to Target cell, MME corresponding to base station under above-mentioned Target cell can provide to above-mentioned base station the context of above-mentioned UE, improved the success rate of the RRC connection re-establishment of above-mentioned UE.

The flow chart of the communication means that Fig. 3 provides for another embodiment of the present invention, as shown in Figure 3, when the executive agent of the step in the present embodiment can carry out RRC connection reconstruction for UE, the base station (abbreviation source base station) under the cell-of-origin of UE, above-mentioned communication means specifically comprises the steps.

S301: the context of MME acquisition request UE is known in base station;

For example, UE, in the time carrying out RRC connection reconstruction, can first select by community conventionally, selects a suitable Target cell, then initiate the request of RRC connection reconstruction to the base station under Target cell, the Target cell here can be the first community in embodiment as shown in Figure 1.Above-mentioned base station receives after the RRC connection reconstruction request message of above-mentioned UE transmission, can be according to message content, and the MME under above-mentioned base station sends a request message, and obtains the context of UE so that MME is known above-mentioned base station requests.Then, MME sends and is used for obtaining contextual request message to source base station, so that the source base station under above-mentioned UE is known the context of MME acquisition request UE.Above-mentioned source base station is as the base station of each step executive agent in the present embodiment.

S302: the context of UE is offered MME by base station;

For example, know after the context of MME acquisition request UE when source base station, the context of above-mentioned UE is offered to MME; For example, the source base station under UE is known after the context of MME acquisition request UE, searches the context of above-mentioned UE, and the context finding is sent to above-mentioned MME in this locality.Here the contextual concrete mode of source base station being obtained to UE does not limit.In the present embodiment, source base station, finding after the context of UE, offers MME by above-mentioned context, provides in the time getting the context of above-mentioned UE to other base stations inquiries for MME, offers corresponding base station.Compared with prior art, this programme is that source base station passes through S1 link, via MME, the context of above-mentioned UE is offered to the target BS that UE re-establishes, rather than by X2 link, the context of UE is directly offered to the target BS that UE re-establishes.When the target BS that UE re-establishes gets after the context of above-mentioned UE, just can complete follow-up UE and re-establish to the first community by above-mentioned target BS control the reconstruction flow process of (UE rebuild Target cell).

Optionally, the present embodiment also comprises the steps.

S303: above-mentioned base station receives the switching command that above-mentioned MME sends.

In above-mentioned base station, the context of above-mentioned UE is offered after above-mentioned MME, can also receive above-mentioned MME and send switching command, and the data service of above-mentioned UE is switched to the target BS that above-mentioned UE re-establishes.

The communication means that the present embodiment provides, when UE request re-establishes to Target cell, source base station under above-mentioned UE place can be corresponding by the base station under above-mentioned Target cell MME the context of above-mentioned UE is offered to the base station under above-mentioned Target cell, improved the success rate of the RRC connection re-establishment of above-mentioned UE.

Optionally, between the base station in the embodiment of the present invention and MME, ask and provide the contextual message of UE and cell to have multiple.For example following for example all can be in conjunction with in embodiments of the present invention.

For example, base station is by be carried at base station configuration transmission (the eNB CONFIGURATION TRANSFER) message that sends to MME for the contextual indication of acquisition request UE, with the context to MME acquisition request UE.Optionally, above-mentioned indication takies certain field in self-organizing network (self-organizing network, SON) configuration transmission (the SON Configuration Transfer) cell in above-mentioned eNB CONFIGURATION TRANSFER message.Optionally, the Target cell re-establishing of above-mentioned UE is controlled in the base station here.

And for example, MME is by be carried at MME configuration transmission (the MME CONFIGURATION TRANSFER) message that sends to base station for the contextual indication of acquisition request UE, to obtain the context of UE to base station requests.Optionally, above-mentioned indication takies certain field in the SON Configuration Transfer cell in above-mentioned MME CONFIGURATION TRANSFER message.Optionally, the cell-of-origin of above-mentioned UE is controlled in the base station here.

And for example, certain field in above-mentioned SON Configuration Transfer cell is specially SON information request (SON Information Request) field, can comprise the Target Cell Identifier re-establishing (the being called for short Re-establishment cell ECGI) information of UE, the identification information (as C-RNTI) of UE, can also comprise ShortMAC-I.

And for example, base station is carried at the context of UE in switching demand (HANDOVER REQUIRED) message that sends to MME.Optionally, the cell-of-origin of above-mentioned UE is controlled in the base station here.

And for example, MME is carried at the context of UE in handover request (HANDOVER REQUEST) message that sends to base station.Optionally, the Target cell that above-mentioned UE re-establishes is controlled in the base station here.

Above-mentioned method as shown in Figures 1 to 3 and can combining for example, below introduces for example according to different scenes.

The flow chart of the communication means that Fig. 4 provides for another embodiment of the present invention, the present embodiment is a kind of specific implementation of method, as shown in Figures 1 to 3 can being bonded to for example in the present embodiment of method as shown in Figures 1 to 3.As shown in Figure 4, said method has related to the base station (abbreviation target BS) under reconstructed object community when affiliated source base station, the UE of UE, UE carries out RRC connection reconstruction, and the affiliated MME of above-mentioned target BS.To be UE occur without switching before RRC connection re-establishment carrying out the application scenarios of said method, for example: RLF occurs UE community A, is reconstructed into community B.Above-mentioned communication means specifically comprises the steps.

S401: target BS receives the RRC connection reconstruction request message (as RRC CONNECTION REESTABLISHMENT REQUEST) that UE sends, above-mentioned RRC connection reconstruction request message is for asking to re-establish the first community to being controlled by above-mentioned base station, and above-mentioned the first community is the Target cell that UE carries out RRC connection reconstruction.

S402.1-402.2: if target BS is not preserved the context of above-mentioned UE, target BS judges whether the Neighboring Cell List of this base station preservation comprises the cell-of-origin (as S402.1) of above-mentioned UE.If the cell-of-origin that the Neighboring Cell List that target BS is preserved comprises above-mentioned UE, target BS sends first request (as eNB UE CONTEXT FETCH) message (as S402.2) to MME, above-mentioned the first request message is for the context of the above-mentioned UE of acquisition request, and above-mentioned the first request message carries the mark of the mark of the mark of the user ID of above-mentioned UE, above-mentioned Target cell, above-mentioned target BS and the source base station of above-mentioned UE.

For example, the Radio Network Temporary Identifier (Cell Radio Network Temporary Identifier, C-RNTI) that user ID can ShiUE community.The mark of Target cell can be the Cell Global Identity (Evolved Cell Global Identifier, ECGI) of the evolution of Target cell.The mark of target BS can be evolution base station mark (evolved NodeB Identifier, eNB ID) and the tracing area mark (Tracking Area Identifier, TAI) of target BS.The mark of source base station can be eNB ID and the TAI of source base station.

Alternatively, in the first request message, also carry following at least one: the first authorization information, for example short MAC(Media Access Control, media interviews control) integrity verification value (short Medium Access Control integrity protection, short MAC-I).Above-mentioned the first authorization information is verified the contextual accuracy of above-mentioned UE for source base station; And, the mark of the cell-of-origin of above-mentioned UE.For example, the mark of cell-of-origin can be the cell physical address of cell-of-origin, as Physical Cell Identifier (Physical Cell Identity, PCI).

For example, if target BS does not find the context of above-mentioned UE in this locality, target BS is according to searching the record that whether has above-mentioned cell-of-origin in the local Neighboring Cell List of preserving of being identified at of the cell-of-origin of above-mentioned UE.If target BS finds the context of above-mentioned UE in this locality, can mate by the mark of the cell-of-origin to above-mentioned UE, thereby know the information of source base station corresponding to above-mentioned cell-of-origin, to obtain the context of above-mentioned UE from MME.

In step 402.1, if do not find the record of cell-of-origin in the Neighboring Cell List that target BS is preserved in this locality, target BS cannot be known by the information of cell-of-origin the information of source base station.Target BS can send RRC connection reconstruction refuse information to UE, to refuse the RRC connection reconstruction request of UE.

S403:MME sends the second request message (as MME UE CONTEXT FETCH) to the source base station of UE, above-mentioned the second request message is for the context of the above-mentioned UE of acquisition request, and above-mentioned the second request message carries the mark of mark, the mark of target BS and the source base station of above-mentioned UE of user ID, the Target cell of above-mentioned UE.Optionally, above-mentioned the second request message also carries following at least one: the mark of the cell-of-origin of the first authorization information (as short MAC-I) and above-mentioned UE.

Optionally, in the present embodiment, MME receives after the first request message of target BS transmission, can judge whether above-mentioned source base station belongs to this MME according to the source base station information in message, also judges whether source base station and target BS belong to this MME; If so, above-mentioned MME directly sends to source base station by the second request message and needn't be via other device forwards; If not, the second request message is sent to the MME under source base station by MME, so that the second request message is sent to source base station by the MME under above-mentioned source base station.

S404: source base station is inquired about the context of above-mentioned UE at inside of base station;

For example, source base station is according to the C-RNTI in the second request message, and the context that information corresponding to Ge community is mated above-mentioned UE is controlled in ergodic source base station.

If also carry the first authorization information (as short MAC-I) in the second request message in above-mentioned steps 403, the present embodiment can also comprise step 405.

S405: source base station is verified the contextual accuracy of above-mentioned UE according to the first authorization information.

For example, source base station calculates local shortMAC-I according to C-RNTI, the PCI of source base station control Ge community and the ECGI of Target cell, and the shortMAC-I carrying in itself and the second request message is compared, if consistent, be proved to be successful, illustrate that source base station preserves the context of above-mentioned UE.

In the present embodiment, if source base station is determined source base station this locality and is preserved the context of UE, source base station can continue to perform step S406: in the time that cell-of-origin and Target cell meet switching condition, provide the context of UE to MME, for example, by sending switching demand (as HANDOVER REQUIRED) message.Optionally, source base station judges that, when whether cell-of-origin and Target cell meet switching condition, adoptable above-mentioned switching condition comprises: allow UE to be switched to Target cell, source base station provides the context of above-mentioned UE to MME.

In the present embodiment, do not preserve the context of UE if source base station is determined source base station, or cell-of-origin and Target cell do not meet switching condition, send failed message to MME.For example, if source base station does not find the context of UE in this locality according to the C-RNTI in the second request message, or short MAC-I authentication failed, or source base station judges that cell-of-origin and Target cell do not meet above-mentioned switching condition, source base station sends failed message to MME, so that failed message is sent to target BS by MME, send RRC connection reconstruction refuse information with indicating target base station to above-mentioned UE, to refuse the RRC connection reconstruction request of UE.

S407:MME sends the first feedback message (as HANDOVER REQUEST) to target BS, and above-mentioned the first feedback message carries the context of UE; .

For example, the context of UE takies the spare fields of HANDOVER REQUEST message.Optionally, in above-mentioned the first feedback message, also comprise the C-RNTI of UE.

Optionally, the present embodiment also comprises step S408.1: when target BS sends the first request message to MME, target BS starts timer; Accordingly, if when target BS receives the first feedback message, above-mentioned timer is not overtime, target BS execution step S408.2: send RRC connection reconstruction to UE and set up (as RRC CONNECTION REESTABLISHMENT SETUP) message.

In the present embodiment, the timer of employing is for guaranteeing that the context that target BS obtains UE from source base station has more ageing.When target BS sends the first request message to MME, start timer.In Preset Time afterwards, do not receive the UE context that MME provides, for example do not receive the first feedback message or receive the failed message of the transmission that MME returns, illustrate that target BS is considered as obtaining from source base station the context failure of UE, target BS sends RRC connection reconstruction refuse information, the RRC connection reconstruction request of initiating to refuse UE to UE.What if receive in the setting-up time of timer, MME returned carries contextual the first feedback message of UE, target BS sends RRC connection reconstruction order (RRC CONNECTION REESTABLISHMENT SETUP) to UE, to complete the RRC connection reconstruction flow process of UE.

Optionally, the present embodiment also comprises step 409: in the time that target BS receives above-mentioned the first feedback message, in the not overtime situation of above-mentioned timer, target BS sends the acknowledge message (as HANDOVER REQUEST ACK) of above-mentioned the first feedback message of response to MME, so that switching command (as HANDOVER COMMAND) is sent to source base station (as S410) by MME, this HANDOVER COMMAND is used to indicate source base station the data service of UE is switched to target BS by MME.The status switch number that source base station can transmit the current data business packet of UE sends to MME(as S411 by the first status message (as eNB SN STATUS TRANSFER)), then the status switch number that, MME transmits the current data business packet of the above-mentioned UE receiving sends to target BS (as S412) to complete the switching of data service by the second status message (as MME SN STATUS TRANSFER).

Optionally, in the present embodiment, if target BS receives the RRC connection reconstruction of UE transmission and completes (RRC CONNECTION REESTABLISIMENT COMPLETE) message (as S413), target BS sends switching notice (HANDOVER NOTIFY) message (as S414) to MME, has moved to target BS so that MME is known UE.MME receives after above-mentioned HANDOVER NOTIFY message, sends context release command (as UE CONTEXT RELEASE COMMAND) (as S415) to source base station.Then, source base station discharges the context (as S416) of above-mentioned UE, to save Internet resources.

Communication means provided by the invention, the context that the base station under the Target cell that UE asks to re-establish can obtain by MME corresponding to above-mentioned base station above-mentioned UE, has improved the success rate of the RRC connection re-establishment of above-mentioned UE.

The flow chart of the communication means that Fig. 5 provides for another embodiment of the present invention.The present embodiment is another specific implementation of method as shown in Figures 1 to 3, the implementation of the method as shown in Figure 4 of also can being considered as under special scenes.Can being bonded to for example in the present embodiment of method as shown in Figures 1 to 4.Optionally, said method is applicable to UE handoff failure and triggers RRC connection reconstruction immediately, and the base station under the Target cell that UE re-establishes need obtain the contextual application scenarios of above-mentioned UE.For example, UE community a does business, handoff failure when above-mentioned UE is switched to community b, therefore above-mentioned UE is reconstructed into community c, base station C need to obtain the context of above-mentioned UE.Above-mentioned scene can be divided into multiple subfield scape, for example: (1) community a, community b and the different station of community c, (2) community a and b Tong Zhaner community, community c, (3) community a and the different station of b, c Tong Zhaner community, community, (4) community a and community c are same community and community a and the different station of community b.In the embodiment of the present invention, the situation that different districts is controlled by same base station is called with station, and different districts is subject to the situation of different base station control to be called different station.

Below as shown in Figure 5, with community a, community b and the different station of community c, between UE community a and community b, there is X2 and switch, and because of handoff failure re-establish to community c(be also the first community in above-described embodiment) be introduced for example.Base station A in Fig. 5 is the base station of controlling the cell-of-origin a of UE, and base station B is the base station of controlling community b, and base station C is the base station of controlling C community, and above-mentioned communication means specifically comprises the steps.

S501: base station A receives the measurement report that UE sends, above-mentioned measurement report is for providing the measurement result of above-mentioned UE.

For example, above-mentioned measurement report carries above-mentioned UE and wishes data service to be switched to Yi Ge community (as the information of the base station B under information b) of community and/or community b.

S502: base station A sends HANDOVER REQUEST message to base station B, and above-mentioned HANDOVER REQUEST message is carried the context of UE.

S503: base station B sends the acknowledge message (as HANDOVER REQUEST ACK) of the above-mentioned HANDOVER REQUEST message of response to base station A, so that the data service of UE is switched to base station B by base station A.

S504: the failure when data service of UE is switched to base station B by base station A.

For example, base station A receives after the acknowledge message of transmission of base station B, the status switch that the current data business packet of UE is transmitted number sends to base station B by sending SN STATUS TRANSFER message, switch with the data service that realizes UE, but because the X2 link between base station A and base station B is unstable, this SN STATUS TRANSFER message sends unsuccessfully.

Optionally, in the time that base station A determines the data service of UE to be switched to base station B, above-mentioned base station A sends HANDOVER COMMAND message (as S505) to above-mentioned UE, to indicate above-mentioned UE to prepare to switch.

In the present embodiment, do not receive any Indication message that base station A or base station B send in the Preset Time of UE after step S505, the data service that UE is considered as above-mentioned UE is switched to base station B failure from base station A, performs step S401.

Step S401 in the present embodiment to step S416(containing step S506) can reference and embodiment as shown in Figure 4 in step explanation.Wherein, the base station A in the present embodiment is considered as to the source base station in embodiment as shown in Figure 4, the base station C in the present embodiment is considered as to the target BS in embodiment as shown in Figure 4.Also: the base station A in the present embodiment and base station C do not contain step S506 at step S401 to step S416(), carry out respectively source base station and the performed step of target BS in embodiment as shown in Figure 4, details repeats no more herein.

In the step S506 of the present embodiment, base station A offers the context of above-mentioned UE after the MME under the C of base station, send handover cancelling (HANDOVER CANCELL) message to base station B, to inform that base station B cancels to the data service of above-mentioned UE the switching flow from base station A to base station B.

In the present embodiment, community a, community b and the different station of community c, while carrying out X2 handoff failure between UE community a and community b, the base station C under the c of community can obtain indirectly by MME the context of above-mentioned UE from the base station A under a of community, above-mentioned UE can be re-established to community c.

The flow chart of the communication means that Fig. 6 provides for another embodiment of the present invention.The present embodiment is another specific implementation of method as shown in Figures 1 to 3, the implementation of the method as shown in Figure 4 of also can being considered as under special scenes.The scene of the present embodiment is identical with the scene of method as shown in Figure 5, be community a, community b and the different station of community c, X2 occurs between UE community a and community b to be switched, and re-establish to community c because of handoff failure, base station A is the base station of controlling the cell-of-origin a of UE, base station B controls the base station of community b, and base station C is the base station of controlling C community, the distortion of the method that therefore the present embodiment also can be as shown in Figure 4.Step S501 in the present embodiment to step 505 can reference and embodiment as shown in Figure 5 in step explanation.Step S401 in the present embodiment to step S416(containing step S606) can reference and embodiment as shown in Figure 4 in step explanation, wherein, base station B in the present embodiment is considered as to the source base station in embodiment as shown in Figure 4, the base station C in the present embodiment is considered as to the target BS in embodiment as shown in Figure 4.Also: the base station B in the present embodiment and base station C do not contain step S506 at step S401 to step S416(), carry out respectively source base station and the performed step of target BS in embodiment as shown in Figure 4, details repeats no more herein.

As shown in Figure 6, in the step S606 of the present embodiment, base station B sends UE context to base station A and discharges (UE CONTEXT RELEASE) message, to indicate base station A to discharge the context of above-mentioned UE.

In the present embodiment, community a, community b and the different station of community c, while carrying out X2 handoff failure between UE community a and community b, the base station C under the c of community can obtain indirectly by MME the context of above-mentioned UE from the base station B under the b of community, above-mentioned UE can be re-established to community c.

It should be noted that, the present embodiment does not limit base station B and obtains contextual opportunity and the mode of above-mentioned UE, and for example base station B may obtain by the message beyond the HANDOVER REQUEST message of step S502 the context of above-mentioned UE.

In addition, the information that the RRC connection re-establishment request that base station C can send according to above-mentioned UE in method as shown in Figure 5 and method as shown in Figure 6 be carried determines which base station (base station A or base station B) may preserve the context of above-mentioned UE, thereby indirectly gets the context of above-mentioned UE by MME.

The present invention is also provided for realizing method and the equipment of giving an example, the below introduction for example that above-described embodiment provides.Description in above-described embodiment is also applicable to the apparatus embodiments of introducing for example below.

The structural representation of the equipment (for example base station) that Fig. 7 provides for one embodiment of the present of invention.As shown in Figure 7, when the said equipment can carry out RRC connection reconstruction for UE, base station under reconstructed object community, for example can be for carrying out method step as shown in Figure 1, below to the said equipment take base station as example is introduced, details and for example also can be referring to the above embodiment of the present invention, example embodiment as shown in Figure 1.

Above-mentioned base station comprises: transceiver 71, memory 72 and processor 73, wherein: the RRC connection reconstruction request message that transceiver 71 sends for receiving UE, above-mentioned RRC connection reconstruction request message is for asking to re-establish the first community to being controlled by above-mentioned base station; Processor 73 is for judging whether memory 72 preserves the context of above-mentioned UE, and in the time that above-mentioned memory 72 is not preserved the context of above-mentioned UE, triggers above-mentioned transceiver 71; Above-mentioned transceiver 71 also, in the time being subject to the triggering of above-mentioned processor 73, obtains the context of above-mentioned UE from MME; Transceiver 71 also, for after above-mentioned MME obtains the context of above-mentioned UE, sends RRC connection reconstruction to above-mentioned UE and sets up message, and the RRC connection reconstruction that receives above-mentioned UE transmission completes message, and sends handoff notification message to above-mentioned MME.

The equipment that the present embodiment provides, in the time that UE request re-establishes the Target cell of controlling to above-mentioned base station, can obtain by MME corresponding to above-mentioned base station the context of above-mentioned UE, has improved the success rate of the RRC connection re-establishment of above-mentioned UE.

The structural representation of the equipment that Fig. 8 provides for another embodiment of the present invention, the present embodiment can be a kind of specific implementation of equipment as shown in Figure 7.As shown in Figure 8, the said equipment can, for carrying out method step as shown in Figure 1, can also be used for carrying out the step that embodiment target BS is as Figure 4-Figure 6 carried out.Be example take base station, above-mentioned base station comprises: transceiver 81, memory 82, processor 83 and timer 84.

The RRC connection reconstruction request message that above-mentioned transceiver 81 sends for receiving UE, above-mentioned RRC connection reconstruction request message is for asking to re-establish the first community to being controlled by above-mentioned base station.

Above-mentioned processor 83 is for judging whether memory 82 preserves the context of above-mentioned UE, and in the time that above-mentioned memory 82 is not preserved the context of above-mentioned UE, triggers above-mentioned transceiver 81.Optionally, in the time that above-mentioned memory 82 is not preserved the context of above-mentioned UE, processor 83 is for judging whether Neighboring Cell List that above-mentioned memory 82 is preserved comprises the cell-of-origin of above-mentioned UE, and in the time determining the cell-of-origin that the Neighboring Cell List preserved of above-mentioned memory 82 comprises above-mentioned UE, trigger above-mentioned transceiver 81.

Above-mentioned transceiver 81 also, in the time being subject to the triggering of above-mentioned processor 83, obtains the context of above-mentioned UE from MME.For example, above-mentioned transceiver 81 can be used for sending the first request message to above-mentioned MME, above-mentioned the first request message is for the context of the above-mentioned UE of acquisition request, and above-mentioned the first request message carries the mark of the user ID of above-mentioned UE, the mark of above-mentioned the first community, the mark of above-mentioned base station and the source base station of above-mentioned UE; And, the first feedback message that above-mentioned transceiver 81 also sends for receiving above-mentioned MME, above-mentioned the first feedback message carries the context of above-mentioned UE, optional, and the context of above-mentioned UE is that above-mentioned MME obtained from the source base station of above-mentioned UE before sending above-mentioned the first feedback message.

Timer 84 in the present embodiment is selectable unit (SU).For example, above-mentioned transceiver 81 is also when sending the first request message to MME, triggering timer 84 starts, if and above-mentioned transceiver 81 is while receiving above-mentioned the first feedback message, above-mentioned timer 84 is not overtime, send RRC connection reconstruction to above-mentioned UE and set up message, and the RRC connection reconstruction that receives the follow-up transmission of above-mentioned UE completes message.

Optionally, if when above-mentioned transceiver 81 also receives above-mentioned the first feedback message for above-mentioned transceiver 81, above-mentioned timer 84 is not overtime, sends the acknowledge message of above-mentioned the first feedback message of response to above-mentioned MME, and above-mentioned acknowledge message can be specifically handoff notification message.

Optionally, in above-mentioned the first request message, also carry following at least one: the first authorization information, for verifying the contextual accuracy of above-mentioned UE; And, the mark of the cell-of-origin of above-mentioned UE.

The equipment that the present embodiment provides is as in the time that UE carries out RRC connection reconstruction, rebuilds the base station corresponding to Target cell, and when carrying out method as shown in Figure 4, one of its implementation is exemplified below.

Transceiver 81 receives the RRC connection reconstruction request message (as S401) that UE sends.Processor 83 judges whether Neighboring Cell List that above-mentioned memory 82 is preserved comprises the cell-of-origin (as S402.1) of above-mentioned UE, in the time determining the cell-of-origin that the Neighboring Cell List preserved of above-mentioned memory 82 comprises above-mentioned UE, trigger above-mentioned transceiver 81 and send the first request message (as S402.2) to MME, and receiving the first feedback message that above-mentioned MME sends, above-mentioned the first feedback message carries the context (as S407) of above-mentioned UE.

Optionally, in the time that above-mentioned transceiver 81 sends the first request message to MME, trigger timer 84 and start (as S408.1), if when above-mentioned transceiver 81 receives above-mentioned the first feedback message, above-mentioned timer 84 is not overtime, sends RRC connection reconstruction to above-mentioned UE and sets up message (as S408.2).The RRC connection reconstruction that above-mentioned transceiver 81 also may receive the follow-up transmission of above-mentioned UE completes message (as S413).If when above-mentioned transceiver 81 receives above-mentioned the first feedback message, above-mentioned timer 84 is not overtime, and above-mentioned transceiver 81 sends the acknowledge message (as S409) of the first feedback message to above-mentioned MME.

Optionally, the transceiver 81 in this base station receives the status switch number of the current data business packet transmission of above-mentioned UE by receiving second state information (as S412) of MME transmission, thereby realizes the data service switching of UE.

Optionally, the RRC connection reconstruction that receives UE transmission when transceiver 81 completes message (as S413), the above-mentioned UE of notice MME has moved to target BS (as S414), so that MME indicates the source base station of above-mentioned UE to discharge the context (as S415-S416) of above-mentioned UE, thereby save Internet resources.

The equipment that the present embodiment provides, in the time that UE request re-establishes the Target cell of controlling to above-mentioned base station, can obtain by MME the context of above-mentioned UE, improves the success rate of the RRC connection re-establishment of above-mentioned UE.

The structural representation of the equipment (for example MME) that Fig. 9 provides for another embodiment of the present invention.As shown in Figure 9, when the said equipment can carry out RRC connection reconstruction for UE, MME corresponding to base station under reconstructed object community, for example can be for carrying out method step as shown in Figure 2, below the said equipment is introduced as an example of MME example, details and for example also can be referring to the above embodiment of the present invention, example embodiment as shown in Figure 2.Above-mentioned MME comprises: receiver 91 and transmitter 92.

Wherein, above-mentioned receiver 91 obtains the context of UE for knowing the first base station requests; Above-mentioned transmitter 92 is for offering the context of above-mentioned UE above-mentioned the first base station; The handoff notification message that above-mentioned receiver 91 also sends for receiving above-mentioned the first base station; Wherein, the Target cell of above-mentioned UE transmission RRC reconstruction request message is controlled in above-mentioned the first base station.

For example, when UE sends the request of RRC connection reconstruction to the base station under above-mentioned Target cell, above-mentioned receiver 91 is known the contextual message of above-mentioned base station (also claiming the first base station) acquisition request UE, and the context of above-mentioned UE is offered above-mentioned the first base station (as S202) by above-mentioned transmitter 92.Optionally, the context that above-mentioned transmitter 92 provides above-mentioned UE to the first base station after, above-mentioned receiver 91 may receive the handoff notification message (as S203) that above-mentioned the first base station sends, and above-mentioned handoff notification message is in order to indicate MME that the data service of above-mentioned UE is switched to above-mentioned the first base station.

Optionally, above-mentioned receiver 91 also can be used for receiving the first request message that the first base station sends, above-mentioned the first request message is for the context of the above-mentioned UE of acquisition request, and above-mentioned the first request message carries the mark of mark, the mark of above-mentioned the first base station and the source base station of above-mentioned UE of the user ID of above-mentioned UE, above-mentioned the first community; The concrete implementation of above-mentioned steps can be referring to the corresponding contents of step (as S402.2).Above-mentioned the first request message also carries following at least one: the first authorization information, for verifying the contextual accuracy of above-mentioned UE; And, the mark of the cell-of-origin of above-mentioned UE.

Optionally, above-mentioned transmitter 92 is also for sending the second request message to the source base station of above-mentioned UE, above-mentioned the second request message is for the context of the above-mentioned UE of acquisition request, and above-mentioned the second request message carries the mark of mark, the mark of above-mentioned the first base station and the source base station of above-mentioned UE of the Target cell of the user ID of above-mentioned UE, above-mentioned UE.Above-mentioned the second request message also carries following at least one: the first authorization information, for verifying the contextual accuracy of above-mentioned UE; And the mark of the cell-of-origin of UE.

Optionally, the equipment that the present embodiment provides can also be used for carrying out the step that embodiment MME as Figure 4-Figure 6 carries out.The said equipment is when carrying out method as shown in Figure 4, and different in detail for carrying out method as shown in Figure 2 with the said equipment, one of its implementation is exemplified below.

Send the request of RRC connection reconstruction to the base station (being called for short the first base station) under above-mentioned Target cell at UE, receiver 91 receives above-mentioned the first request message (as S402.2) that above-mentioned the first base station sends, transmitter 92 sends above-mentioned the second request message (as S403) to the source base station of above-mentioned UE, to obtain the context of above-mentioned UE.Determine that at the source base station of above-mentioned UE above-mentioned source base station preserves in the contextual situation of above-mentioned UE, what receiver 91 can receive that above-mentioned source base station sends carries the contextual handoff notification message of above-mentioned UE (as S406).

Transmitter 92 sends the first feedback message (as S407) so that the context of above-mentioned UE is offered behind the first base station, receiver 91 may receive the acknowledge message (as S409) of above-mentioned first feedback message of response of above-mentioned the first base station transmission, above-mentioned message can be handoff notification message, and above-mentioned handoff notification message is in order to indicate MME that the data service of above-mentioned UE is switched to above-mentioned the first base station.

Transmitter 92 sends switching command (as S410) afterwards to the source base station under above-mentioned UE, receive after above-mentioned switching command, receiver 91 receives the first status message that the source base station under above-mentioned UE sends, and above-mentioned the first status message carries the status switch number of the current data business packet transmission of above-mentioned UE.Transmitter 92 is notified above-mentioned status switch number to above-mentioned the first base station by sending the second status message (as S412).Then, receiver 91 receives the UE that the first base station sends and has moved to the message (as S414) of target BS, and indicates source base station to discharge the context (as S415-S416) of above-mentioned UE, to save Internet resources.

The MME equipment that the present embodiment provides, in the time that UE request re-establishes to Target cell, MME that can be corresponding to the base station as under above-mentioned Target cell can provide to above-mentioned base station the context of above-mentioned UE, has improved the success rate of the RRC connection re-establishment of above-mentioned UE.

The structural representation of the equipment (for example base station) that Figure 10 provides for another embodiment of the present invention.As shown in figure 10, when the said equipment can carry out RRC connection reconstruction for UE, base station under the cell-of-origin of UE, for example can be for carrying out method step as shown in Figure 3, below to the said equipment take base station as example is introduced, details and for example also can be referring to the above embodiment of the present invention, example embodiment as shown in Figure 3.Above-mentioned base station comprises: receiver 101 and transmitter 102, and wherein, above-mentioned receiver 101 is for knowing the context of MME acquisition request UE; Above-mentioned transmitter 102 is for offering above-mentioned MME by the context of above-mentioned UE; The switching command that above-mentioned receiver 101 also sends for receiving above-mentioned MME; Wherein, the cell-of-origin of above-mentioned UE is controlled in above-mentioned base station.

The equipment that the present embodiment provides, in the time that UE request re-establishes to Target cell, the context of above-mentioned UE is offered the base station under above-mentioned Target cell by MME that can be corresponding by the base station under above-mentioned Target cell, improves the success rate of the RRC connection re-establishment of above-mentioned UE.

The structural representation of the equipment that Figure 11 provides for another embodiment of the present invention, a kind of specific implementation of equipment as shown in figure 10.As shown in figure 11, the said equipment can, for carrying out method step as shown in Figure 3, can also be used for carrying out the step that embodiment source base station is as Figure 4-Figure 6 carried out.Be example take base station, above-mentioned base station comprises: receiver 111, processor 112, memory 113 and transmitter 114, wherein, above-mentioned receiver 111 is for knowing the context (as S301) of MME acquisition request UE.Optionally, as above-mentioned receiver 111 can receive the second request message that above-mentioned MME sends and know the context of above-mentioned MME acquisition request UE, above-mentioned the second request message carries the mark of target BS and the mark of this base station of the mark of the Target cell of the user ID of above-mentioned UE, above-mentioned UE, above-mentioned UE.Optionally, above-mentioned the second request message also carries following at least one: the first authorization information, for verifying the contextual accuracy of above-mentioned UE; And the mark of the cell-of-origin of above-mentioned UE.Optionally, above-mentioned processor 112 is for the context at the above-mentioned UE of the interior inquiry of above-mentioned memory 113; If while carrying the first authorization information in above-mentioned the second request message, above-mentioned processor 112 is also for verifying the contextual accuracy of above-mentioned UE according to above-mentioned the first authorization information; In addition, above-mentioned memory 113 is for storing the context of all UE under being controlled by above-mentioned base station; Above-mentioned transmitter 114 is for offering above-mentioned MME(as S302 by the context of above-mentioned UE); The switching command (as S303) that above-mentioned receiver 111 also sends for receiving above-mentioned MME.

The equipment that the present embodiment provides is as in the time that UE carries out RRC connection reconstruction, rebuilds to MME corresponding to base station under Target cell, and when carrying out method as shown in Figure 4, one of its implementation is exemplified below.

Receiver 111 knows that from above-mentioned MME UE sends the request of RRC connection reconstruction to the contextual message (as S403) of base station corresponding to above-mentioned Target cell (being called for short the first base station) acquisition request UE, processor 112 is according to the C-RNTI in above-mentioned message, at the context (as S404) of the above-mentioned UE of the interior inquiry of above-mentioned memory 113.If also carry the first authorization information in above-mentioned the second request message, for example shortMAC-I, above-mentioned processor 112 is verified (as S405) to the context of the above-mentioned UE finding with regard to its accuracy according to above-mentioned the first authorization information.

If processor 112 is determined the context of preserving above-mentioned UE in memory 113, transmitter 114 can, in the time that cell-of-origin and Target cell meet switching condition, provide the context (as S406) of above-mentioned UE to MME.

Optionally, when processor 112 judges by processor 112 whether cell-of-origin and Target cell meet switching condition, adoptable switching condition comprises: allow UE to be switched to Target cell, transmitter 114 provides the context of above-mentioned UE to MME.

Optionally, do not preserve the context of UE if processor 112 is determined source base station, or cell-of-origin do not meet switching condition with Target cell, transmitter 114 is to MME transmission failed message.For example, if processor 112 does not find the context of UE in memory 113 according to the C-RNTI in above-mentioned the second request message, or short MAC-I authentication failed, or judge that cell-of-origin and Target cell do not meet above-mentioned switching condition, transmitter 114 sends failed message to above-mentioned MME, so that failed message is sent to target BS by above-mentioned MME, send RRC connection reconstruction refuse information with indicating target base station to above-mentioned UE, to refuse the RRC connection reconstruction request of UE.

Optionally, before transmitter 114 provides the context of above-mentioned UE to above-mentioned MME, processor 112 first judges whether above-mentioned source base station and target BS belong to a MME, if so, indicate above-mentioned transmitter 114 context of UE directly can be sent to the MME under above-mentioned source base station and target BS; If not, above-mentioned transmitter 114 need be by the context of above-mentioned UE after the MME under source base station be transmitted to the MME that target BS is corresponding, then sends to target BS through MME corresponding to target BS.

At transmitter 114 after above-mentioned MME provides the context of above-mentioned UE, can may receive the switching command (as S410 in figure) being sent by above-mentioned MME by receiver 111, above-mentioned source base station is received after above-mentioned switching command, and the status switch the current data business packet of above-mentioned UE being transmitted number sends status switch that the first status message (as S411 in figure) transmits the current data business packet of above-mentioned UE number via being sent to above-mentioned MME by transmitter 114; So that above-mentioned MME receives after above-mentioned the first status message, the status switch number that the current data business packet of above-mentioned UE is transmitted is sent to and offers above-mentioned target BS; Then, receiver 111 may receive the contextual message (as S415) of the above-mentioned UE of release of above-mentioned MME transmission, and memory 113 is deleted the context (as S416) of above-mentioned UE, to save Internet resources.

The equipment that the present embodiment provides, when UE request re-establishes to Target cell, the context of above-mentioned UE is offered the base station under above-mentioned Target cell by MME that can be corresponding by the base station under above-mentioned Target cell, improves the success rate of the RRC connection re-establishment of above-mentioned UE.

The present invention also provides a kind of system, comprises the base station as shown in embodiment as arbitrary in Fig. 7-8, MME as shown in Fig. 9 embodiment, base station and the UE as shown in embodiment as arbitrary in Figure 10-11.

Those skilled in the art can be well understood to, for convenience and simplicity of description, only be illustrated with the division of above-mentioned each functional module, in practical application, can above-mentioned functions be distributed and completed by different functional modules as required, be divided into different functional modules by the internal structure of device, to complete all or part of function described above.The system of foregoing description, the specific works process of device and unit, can, with reference to the corresponding process in preceding method embodiment, not repeat them here.

In the several embodiment that provide in the application, answer above-mentioned understanding, disclosed system, apparatus and method, can realize by another way.For example, device embodiment described above is only schematic, for example, the division of above-mentioned module or unit, be only that a kind of logic function is divided, when actual realization, can have other dividing mode, for example multiple unit or assembly can in conjunction with or can be integrated into another system, or some features can ignore, or do not carry out.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, indirect coupling or the communication connection of device or unit can be electrically, machinery or other form.

The above-mentioned unit as separating component explanation can or can not be also physically to separate, and the parts that show as unit can be or can not be also physical locations, can be positioned at a place, or also can be distributed in multiple network element.Can select according to the actual needs some or all of unit wherein to realize the object of the present embodiment scheme.

In addition, the each functional unit in each embodiment of the application can be integrated in a processing unit, can be also that the independent physics of unit exists, and also can be integrated in a unit two or more unit.Above-mentioned integrated unit both can adopt the form of hardware to realize, and also can adopt the form of SFU software functional unit to realize.

If above-mentioned integrated unit is realized and during as production marketing independently or use, can be stored in a computer read/write memory medium using the form of SFU software functional unit.Based on such understanding, the all or part of of the part that the application's technical scheme contributes to prior art in essence in other words or technique scheme can embody with the form of software product, above-mentioned computer software product is stored in a storage medium, comprise that some instructions (can be personal computers in order to make a computer equipment, server, or the network equipment etc.) or processor (processor) carry out all or part of step of method described in each embodiment of the application.And aforesaid storage medium comprises: various media that can be program code stored such as USB flash disk, portable hard drive, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CDs.

The above, above embodiment only, in order to the application's technical scheme to be described, is not intended to limit; Although the application is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of the each embodiment technical scheme of the application.

Claims (35)

1. a communication means, is characterized in that, comprising:

Base station receives the radio resource control RRC connection reconstruction request message that user equipment (UE) sends, and described RRC connection reconstruction request message is for asking to re-establish the first community to being controlled by described base station;

If the context of described UE is not preserved in described base station, described base station obtains the context of described UE from mobile management entity MME;

Described base station sends RRC connection reconstruction to described UE and sets up message, and receives the RRC connection reconstruction that described UE sends and complete message;

Described base station sends handoff notification message to described MME.

2. method according to claim 1, is characterized in that, the context that described base station obtains described UE from MME comprises:

Described base station sends the first request message to described MME, described the first request message is for the context of UE described in acquisition request, and described the first request message carries the mark of the user ID of described UE, the mark of described the first community, the mark of described base station and the source base station of described UE;

Described base station receives the first feedback message that described MME sends, and described the first feedback message carries the context of described UE.

3. method according to claim 2, is characterized in that, described the first request message also carries following at least one:

The first authorization information, for verifying the contextual accuracy of described UE; And

The mark of the cell-of-origin of described UE.

4. method according to claim 1 and 2, is characterized in that, the context of described UE is that described MME obtained from the source base station of described UE before sending described the first feedback message.

5. according to the method described in claim 2 to 4 any one, it is characterized in that, described method also comprises:

When described base station sends the first request message to MME, described base station initiated timer;

If when described base station receives described the first feedback message, described timer is not overtime, and described base station sends RRC connection reconstruction to described UE and sets up message.

6. method according to claim 5, is characterized in that, described method also comprises:

If when described base station receives described the first feedback message, described timer is not overtime, and described base station sends the acknowledge message of described the first feedback message of response to described MME.

7. according to the method described in claim 1 to 6 any one, it is characterized in that,

If the context of described UE is not preserved in described base station, described base station judges whether the Neighboring Cell List of described base station preservation comprises the cell-of-origin of described UE; If the cell-of-origin that the Neighboring Cell List that preserve described base station comprises described UE, described base station obtains the context of described UE from MME.

8. a communication means, is characterized in that, comprising:

Mobile management entity MME knows that the first base station requests obtains the context of user equipment (UE);

The context of described UE is offered described the first base station by described MME;

Described MME receives the handoff notification message that described the first base station sends;

Wherein, the Target cell of described UE transmission radio resource control RRC reconstruction request message is controlled in described the first base station.

9. method according to claim 8, is characterized in that, described MME knows that the context that described the first base station requests is obtained UE comprises:

Described MME receives the first request message that described the first base station sends, described the first request message is for the context of UE described in acquisition request, and described the first request message carries the mark of mark, the mark of described the first base station and the source base station of described UE of the user ID of described UE, described the first community.

10. method according to claim 9, is characterized in that, described the first request message also carries following at least one:

The first authorization information, for verifying the contextual accuracy of described UE; And

The mark of the cell-of-origin of described UE.

Method described in 11. according to Claim 8 to 10 any one, is characterized in that, described MME also comprises before the context of described UE is offered to described the first base station:

Described MME sends the second request message to the source base station of described UE, described the second request message is for the context of UE described in acquisition request, and described the second request message carries the mark of mark, the mark of described the first base station and the source base station of described UE of the Target cell of the user ID of described UE, described UE.

12. methods according to claim 11, is characterized in that, described the second request message also carries following at least one:

The first authorization information, for verifying the contextual accuracy of described UE; And

The mark of the cell-of-origin of described UE.

Method described in 13. according to Claim 8 to 12, is characterized in that,

The context that described MME obtains described UE from the source base station of described UE comprises: the context of the described UE that the source base station that described another MME of MME process receives described UE provides;

Wherein, described MME is described MME corresponding to the first base station, MME corresponding to source base station that described another MME is described UE.

14. 1 kinds of communication meanss, is characterized in that, comprising:

The context of mobile management entity MME acquisition request user equipment (UE) is known in base station;

The context of described UE is offered described MME by described base station;

Described base station receives the switching command that described MME sends; Wherein, the cell-of-origin of described UE is controlled in described base station.

15. methods according to claim 14, is characterized in that, described base station knows that the context of MME acquisition request UE comprises:

Described base station receives the second request message that described MME sends, described the second request message is for the context of UE described in acquisition request, and described the second request message carries the mark of target BS and the mark of described base station of the mark of the Target cell of the user ID of described UE, described UE, described UE.

16. according to the method described in claims 14 or 15, it is characterized in that, described the second request message also carries following at least one:

The first authorization information, for verifying the contextual accuracy of described UE; And

The mark of the cell-of-origin of described UE.

17. methods according to claim 16, is characterized in that, described base station also comprises before the context of described UE is offered to described MME:

The context of described UE is inquired about in described base station at described inside of base station;

The contextual accuracy of described UE is verified in described base station according to described the first authorization information.

18. 1 kinds of base stations, is characterized in that, comprising: transceiver, memory and processor;

The radio resource control RRC connection reconstruction request message that described transceiver sends for receiving user equipment (UE), described RRC connection reconstruction request message is for asking to re-establish the first community to being controlled by described base station;

Described processor is used for judging whether described memory preserves the context of described UE, and in the time that described memory is not preserved the context of described UE, triggers described transceiver;

Described transceiver, also for when the triggering that is subject to described processor, obtains the context of described UE from mobile management entity MME;

Described transceiver also, for after described MME obtains the context of described UE, sends RRC connection reconstruction to described UE and sets up message, and the RRC connection reconstruction that receives described UE transmission completes message, and sends handoff notification message to described MME.

19. base stations according to claim 18, is characterized in that,

Described transceiver is for sending the first request message to described MME, described the first request message is for the context of UE described in acquisition request, and described the first request message carries the mark of the user ID of described UE, the mark of described the first community, the mark of described base station and the source base station of described UE;

The first feedback message that described transceiver also sends for receiving described MME, described the first feedback message carries the context of described UE.

20. base stations according to claim 19, is characterized in that, described the first request message also carries following at least one:

The first authorization information, for verifying the contextual accuracy of described UE; And

The mark of the cell-of-origin of described UE.

21. according to the base station described in claim 18 or 19, it is characterized in that, the context of described UE is that described MME obtained from the source base station of described UE before sending described the first feedback message.

22. according to claim 19 to the base station described in 21 any one, it is characterized in that, described base station also comprises timer;

Described transceiver also when sending the first request message to MME, triggers described timer and starts, and if described transceiver while receiving described the first feedback message, described timer is not overtime, sends RRC connection reconstruction to described UE and sets up message.

23. base stations according to claim 22, is characterized in that, described transceiver also for: if when described transceiver receives described the first feedback message, described timer is not overtime, sends the acknowledge message of described the first feedback message of response to described MME.

24. according to the base station described in claim 18-23 any one, it is characterized in that, described processor also for: in the time that described memory is not preserved the context of described UE, judge whether the Neighboring Cell List of described memory preservation comprises the cell-of-origin of described UE, and the Neighboring Cell List of preserving when described memory comprise described UE cell-of-origin time, trigger described transceiver.

25. 1 kinds of mobile management entity MME, is characterized in that, comprising: receiver and transmitter;

Described receiver obtains the context of user equipment (UE) for knowing the first base station requests;

Described transmitter is for offering described the first base station by the context of described UE;

The handoff notification message that described receiver also sends for receiving described the first base station;

Wherein, the Target cell of described UE transmission radio resource control RRC reconstruction request message is controlled in described the first base station.

26. MME according to claim 25, is characterized in that,

The first request message that described receiver sends for receiving described the first base station, described the first request message is for the context of UE described in acquisition request, and described the first request message carries the mark of mark, the mark of described the first base station and the source base station of described UE of the user ID of described UE, described the first community.

27. MME according to claim 26, is characterized in that, described the first request message also carries following at least one:

The first authorization information, for verifying the contextual accuracy of described UE; And

The mark of the cell-of-origin of described UE.

28. according to the MME described in claim 25 to 27 any one, it is characterized in that,

Described transmitter is also for sending the second request message to the source base station of described UE, described the second request message is for the context of UE described in acquisition request, and described the second request message carries the mark of mark, the mark of described the first base station and the source base station of described UE of the Target cell of the user ID of described UE, described UE.

29. MME according to claim 28, is characterized in that, described the second request message also carries following at least one:

The first authorization information, for verifying the contextual accuracy of described UE; And

The mark of the cell-of-origin of described UE.

30. according to the MME described in claim 25 to 29 any one, it is characterized in that,

Described receiver is for the context of the described UE that receives the source base station of described UE through another MME and provide;

Wherein, described MME is described MME corresponding to the first base station, MME corresponding to source base station that described another MME is described UE.

31. 1 kinds of base stations, is characterized in that, comprising: receiver and transmitter,

Described receiver is for knowing the context of mobile management entity MME acquisition request user equipment (UE);

Described transmitter is for offering described MME by the context of described UE;

The switching command that described receiver also sends for receiving described MME; Wherein, the cell-of-origin of described UE is controlled in described base station.

32. base stations according to claim 31, is characterized in that,

The second request message that described receiver sends for receiving described MME, described the second request message is for the context of UE described in acquisition request, and described the second request message carries the mark of target BS and the mark of described base station of the mark of the Target cell of the user ID of described UE, described UE, described UE.

33. according to the base station described in claim 31 or 32, it is characterized in that, described the second request message also carries following at least one:

The first authorization information, for verifying the contextual accuracy of described UE; And

The mark of the cell-of-origin of described UE.

34. base stations according to claim 33, is characterized in that, also comprise processor and memory;

Described processor for inquiring about the context of described UE in described memory; And verify the contextual accuracy of described UE according to described the first authorization information.

35. 1 kinds of systems, is characterized in that, comprising: the mobile management entity described in base station, claim 25 to 30 any one described in claim 18 to 24 any one, base station and subscriber equipment described in claim 30 to 34 any one.

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