CN104053197A - Aircraft switching method in ground-air long term evolution system, and base station and aircraft - Google Patents

Aircraft switching method in ground-air long term evolution system, and base station and aircraft Download PDF

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Publication number
CN104053197A
CN104053197A CN201310084122.9A CN201310084122A CN104053197A CN 104053197 A CN104053197 A CN 104053197A CN 201310084122 A CN201310084122 A CN 201310084122A CN 104053197 A CN104053197 A CN 104053197A
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aircraft
community
base station
cell base
cell
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Chinese (zh)
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金巴
高有军
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China Mobile Communications Group Co Ltd
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China Mobile Communications Group Co Ltd
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Priority to CN201310084122.9A priority Critical patent/CN104053197A/en
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Abstract

The invention provides an aircraft switching method in a ground-air long term evolution system, and a base station and an aircraft. The method comprises: a first cell base station receiving a measuring report reported by an aircraft about a second cell, wherein the first cell base station is a base station which a first cell belongs to, the first cell is a current service cell of the aircraft, the second cell is a neighboring cell of the first cell, and the measuring report is obtained by the aircraft through measuring when signal quality of the first cell is lower than a preset threshold; and after the first cell base station receives the measuring report, sending a switching command to the aircraft and controlling the aircraft to be switched to the second cell according to confirmation information, obtained in advance, of the second cell. According to the invention, the aircraft switching process can be optimized, and the switching success rate is improved.

Description

The changing method of aircraft, base station and aircraft in air-ground long evolving system
Technical field
The present invention relates to mobile communication technology field, be specifically related to changing method, base station and the aircraft of aircraft in a kind of air-ground long evolving system.
Background technology
Evolved packet system (EPS, Evolved Packet System) is the network architecture based on Long Term Evolution (LTE, Long Term Evolution) system of 3GPP exploitation.As shown in Figure 1, comprise evolved universal terrestrial radio access network (E-UTRAN, Evolved-Universal Terrestrial Radio Access Network) and evolution block core net (EPC, Evolved Packet Core).
E-UTRAN be 3GPP exploitation based on Long Term Evolution (LTE, Long Term Evolution) network architecture of system, comprise the network entities such as base station (eNB, Evolved NodeB) and UE, for the user's face between base station in air interface and UE and chain of command protocol processes and data transmission.Wherein, the interface between MME/S-GW gateway and eNB is called S1 interface, and the interface between eNB and eNB is called X2 interface.Interface between UE and eNB is called LTE-Uu interface.
EPC mainly comprises Mobility Management Entity (MME, Mobility Management Entity), home signature user server (HSS, Home Subscriber Server), gateway (SGW, Serving Gateway) and packet data gateway (PGW, Packet Data Network Gateway).
Wherein, MME is the chain of command network entity of EPS, is mainly responsible for the selection function, alarm information transmission of Lawful Interception, the PGW/SGW/MME of the processing of mobile management, session management, Non-Access Stratum signaling of UE and safety encipher function, signaling, selects suitable eNB etc. for alarm information.MME connects eNB by S1-MME interface.
HSS, for preserving user's subscription data, comprises user ID, phone number, various signing service quality (QoS, Quality of Service) parameter, the MME of service-user and the address of PGW etc.
S-GW is the network entity of user's face of EPS, it is the mobility anchor point switching between eNB, also be the mobility anchor point switching between 3GPP system, the function such as the up-downgoing charging of local route data when carrying out downlink data buffer memory, the roaming of Lawful Interception, idle condition UE of the route of grouping and forwarding capability, user's face.S-GW connects eNB by S1-U interface.
PGW be EPS network with packet data network as the gateway that internet (Internet) is connected, mainly process the functions such as the thresholding control, UE IP address assignment, Lawful Interception of up-downgoing data flow.
In LTE system, for the mobile terminal of communicating by letter, when it moves to another region from a region, in order to keep continuity, network terminal can be carried out control terminal according to switching judging strategy and start handoff procedure, and it is the critical process of processing during connection status, must be fast and accurately, the selection of Target cell must be best, make user discover less than.The switching flow of LTE system can be drawn according to the agreement research to 3GPP36 series, 3 processes as shown in Figure 2 can be divided into: measuring process, judging process and implementation.
Measuring process is mainly that the adjacent cell information providing according to the measurement reconfiguration message of system transmission is measured, travelling carriage (UE) is according to this community of information search and the peripheral cell that receive, result can report network side by event or periodically, adjudicate for network terminal reference.The uplink signal of UE is also constantly measured in base station simultaneously, and network element now enters the corresponding network judgement stage.Judging process is a critical function of network terminal, and event and content that UE is reported are adjudicated, if do not meet thresholding and condition, ignore, if meet given condition, choose the Target cell that will switch, issue physical channel reconfiguration message to UE, start handoff procedure.Send before reconfiguration message to UE in network terminal, need to carry out to Target cell the foundation configuration of wireless link, issuing message again after configuration completes.In this message, contain the new configuration information of ID, security relevant information, mobile control information, carrier frequency and the each sublayer of Access Layer of Target cell etc.
The idiographic flow of a kind of switching of LTE system can comprise the following steps, and wherein said source eNB refers to the affiliated eNB in Serving cell of UE, and object eNB refers to the affiliated eNB in Target cell that UE switches:
1) source eNB controls the measuring process of domination UE by measurement;
2) UE sends measurement report to source eNB;
3) source eNB does switch decision by UE measurement report, bearer service and information on services;
4) source eNB sends out handover request to target eNB;
5) access control is carried out in Target cell;
6) target eNB is sent Handover Request Acknowledge to source eNB;
7) source eNB sends switching command and starts to UE packet is turned to target eNB;
8) source eNB sends SN Status Transfer(packet sequence numbering to target eNB) state information;
9) UE does last synchronizeing with target ENB, carries out community access by RACH;
10) target eNB provides uplink assignment information and Timing Advance information;
11) UE sends to switch to target eNB and confirms, target eNB can send data to UE;
12) target eNB is sent a PATH SWITCH information to MME, and notice MME UE has changed Serving cell;
13) MME sends user's face update request to S-GW;
14) S-GW selects downlink data link to target side;
15) S-GW sends user's face renewal response to MME;
16) MME confirms PATH SWITCH information by PATH SWITCH ACK;
17) by sending RELEASE RESOURCE, target eNB notification source eNB handover success, and releasing resource;
18) receive RELEASE RESOURCE message, source eNB can discharge and resource wireless, that user's face is relevant.
Can see to such an extent that to have LTE hand off signaling quite a lot of alternately from LTE hand off signaling flow process.Inventor finds after deliberation, LTE handoff failure or switch and Radio Link Failure (RLF) occurs mainly contain two reasons at present, reason be handoff parameter arrange unreasonable, Another reason is that handoff procedure signaling sends unsuccessfully.In other words, send unsuccessfully or reduce process signaling process if can reduce handoff procedure signaling, just can effectively optimize and improve LTE handover success rate.
Summary of the invention
In view of this, the object of the embodiment of the present invention is to provide changing method, base station and the aircraft of aircraft in a kind of air-ground LTE system, and the handoff procedure of optimizing aircraft improves handover success rate.
For solving the problems of the technologies described above, the embodiment of the present invention provides scheme as follows:
The changing method of aircraft in a kind of air-ground LTE system, described air-ground LTE system includes multiple base stations and aircraft, the flight path of described aircraft is covered by the community of multiple base stations, and in advance the configuration information of the multiple communities that cover described flight path is handed down to described aircraft;
Described changing method comprises:
The measurement report of the second community that the first cell base station reception aircraft reports, wherein, the first cell base station is the base station under the first community, described the first community is the current service cell of described aircraft, described the second community is the adjacent cell of the first community, and to be described aircraft measure during lower than default thresholding at the signal quality of the first community described measurement report obtains;
Described the first cell base station receives after described measurement report, sends switching command to described aircraft, and the configuration information of controlling the second community that described aircraft utilization obtains in advance switches to described the second community.
Another changing method of aircraft in the air-ground LTE system that the embodiment of the present invention provides, comprising:
The second cell base station receives the packet sequence numbering state SN Status Transfer information that the first cell base station sends, described SN Status Transfer information is that the first cell base station is sending to the second cell base station after aircraft sends switching command, described switching command is to send after the first cell base station receives the measurement report of the second community that aircraft reports during lower than default thresholding at the signal quality of the first community, wherein the first community is the current service cell of aircraft, and the second community is the adjacent cell of the first community;
The second cell base station receives the downlink data packet of the described aircraft of the first cell base station forwarding;
The second cell base station receives the access request that described aircraft is initiated according to the configuration information of the second community obtaining in advance, and described aircraft is switched to described the second community.
The another changing method of aircraft in the air-ground LTE system that the embodiment of the present invention provides, comprising:
Described aircraft is at the signal quality of the first community during lower than default thresholding, measure and obtain the measurement report of the second community and report to the first cell base station, wherein the first cell base station is the base station under the first community, the first community is the current service cell of described aircraft, and the second community is the adjacent cell of the first community;
Described aircraft receives described the first cell base station and is receiving the switching command sending after described measurement report;
Described aircraft, according to described switching command, utilizes the configuration information of the second community obtaining in advance to switch to described the second community.
The embodiment of the present invention provides the first cell base station in a kind of air-ground LTE system, described air-ground LTE system includes multiple base stations and aircraft, the flight path of described aircraft is covered by the community of multiple base stations, and described aircraft obtains the configuration information of the multiple communities that cover described flight path in advance;
Described the first cell base station comprises:
Receiving element, for receiving the measurement report of the second community that aircraft reports, wherein, the first cell base station is the base station under the first community, described the first community is the current service cell of described aircraft, described the second community is the adjacent cell of the first community, and to be described aircraft measure during lower than default thresholding at the signal quality of the first community described measurement report obtains;
Switch control unit, for receiving after described measurement report at described receiving element, sends switching command to described aircraft, and the configuration information of controlling the second community that described aircraft utilization obtains in advance switches to described the second community.
The second cell base station in the air-ground LTE system that the embodiment of the present invention provides comprises:
The first receiving element, the packet sequence numbering state SN Status Transfer information sending for receiving the first cell base station, described SN Status Transfer information is that the first cell base station is sending to the second cell base station after aircraft sends switching command, described switching command is to send after the first cell base station receives the measurement report of the second community that aircraft reports during lower than default thresholding at the signal quality of the first community, wherein the first community is the current service cell of aircraft, and the second community is the adjacent cell of the first community;
The second receiving element, the downlink data packet of described aircraft forwarding for receiving the first cell base station;
Access unit, the access request of initiating according to the configuration information of the second community obtaining in advance for receiving described aircraft, switches to described the second community by described aircraft.
Aircraft in the air-ground LTE system that the embodiment of the present invention provides comprises:
Measuring unit, for at the signal quality of the first community during lower than default thresholding, measure and obtain the measurement report of the second community and report to the first cell base station, wherein the first cell base station is the base station under the first community, the first community is the current service cell of described aircraft, and the second community is the adjacent cell of the first community;
Receiving element, is receiving for receiving described the first cell base station the switching command sending after described measurement report;
Switch unit, for according to described switching command, utilizes the configuration information of the second community obtaining in advance to switch to described the second community.
The embodiment of the present invention also provides a kind of air-ground LTE system, it is characterized in that, comprises above-described the first cell base station, the second cell base station and aircraft.
Can find out from the above, in the air-ground LTE system that the embodiment of the present invention provides, changing method, base station and the aircraft of aircraft, can simplify hand off signaling flow process, and then avoid occurring in handoff procedure the probability of RLF, improves handover success rate.
Brief description of the drawings
Fig. 1 is the network architecture schematic diagram of the LTE system of prior art;
Fig. 2 is the switching flow of the LTE system of prior art;
Fig. 3 be in the embodiment of the present invention in air-ground LTE system aircraft flight route cover schematic diagram;
The schematic flow sheet of a kind of changing method that Fig. 4 provides for the embodiment of the present invention;
The schematic flow sheet of the another kind of changing method that Fig. 5 provides for the embodiment of the present invention;
The schematic flow sheet of another changing method that Fig. 6 provides for the embodiment of the present invention;
Fig. 7 is the overall procedure schematic diagram of the changing method of the embodiment of the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the accompanying drawings and the specific embodiments.
Air-ground LTE system includes multiple base stations (eNB) and aircraft, and the flight path of aircraft is covered by the community of multiple base stations.Please refer to Fig. 3, Fig. 3 shows the covering signal of base station 1~3 in air-ground LTE system and corresponding cell1~3.In air-ground LTE system, route covering and general LTE are coated with following difference:
1) UE (aircraft) only has a paths and a kind of direct of travel;
2) under air-ground coverage condition, the course of UE and switching cell can be known in advance.
Therefore, the hand off signaling flow process of aircraft between two adjacent communities can be done to such an extent that simply avoid existing LTE hand off signaling complexity.The feature of the predetermined flight circuit that the embodiment of the present invention has for aircraft, proposes a kind of changing method of simplifying in handoff procedure, to improve the handover success rate of air-ground LTE system.
In the embodiment of the present invention, described air-ground LTE system includes MME, multiple base station and aircraft, and the flight path of described aircraft is covered by the community of multiple base stations.As a kind of implementation, the multiple base stations on described flight path are all connected to same MME, and connect by X2 interface between adjacent base station.As another kind of implementation, in described multiple base station, have and be connected to the adjacent base station that different MME connect, the first base station in this adjacent base station is connected to a MME, the second base station is connected to the 2nd MME, and, data between the first base station and a MME, by the S1 interface between the 2nd MME and the second base station, are pass-through to the second base station.
In the embodiment of the present invention, before aircraft takeoff, can in advance the configuration information of the multiple communities that cover described flight path be handed down to described aircraft, described configuration information specifically can comprise: the community ID of described multiple communities, the random access channel resource assignment information of each community, measurement configuration parameter, the distribution of RACH resource etc.
In below describing, the first community refers to the current service cell of aircraft, the first cell base station is the base station (being source base station) under the first community, the second community refers to the Target cell that aircraft switches, the second cell base station is the base station (being object base station) under the second community, and described the second community is the adjacent cell of the first community.
Below by respectively from the angle of source base station, object base station and aircraft, the changing method of aircraft in the air-ground LTE system of the embodiment of the present invention is described.
First,, from the angle of source base station (i.e. the first cell base station), the switching flow of the embodiment of the present invention is described.Please refer to Fig. 4, the changing method of aircraft in the air-ground LTE system that the embodiment of the present invention provides, comprises the following steps:
Step 41, the first cell base station receives the measurement report of the second community of reporting of aircraft, and wherein, to be described aircraft measure during lower than default thresholding and obtain at the signal quality of the first community described measurement report.
Here, aircraft, can, according to the configuration information of the community of prior acquisition, be measured cell list Zhong community during lower than default thresholding at the signal quality of the first community, obtains corresponding measurement report.For example, can include the information of the adjacent cell of current service cell on flight path in cell list, aircraft is measured according to the information of these adjacent cells, obtains the measurement report of the adjacent cell that meets demand on signal quality and reports the first cell base station.
Step 42, the first cell base station receives after described measurement report, sends switching command to described aircraft, and the configuration information of controlling the second community that described aircraft utilization obtains in advance switches to described the second community.
Here, the first cell base station is receiving after measurement report, carries out switching judging, and determination strategy the present invention is not specifically limited.In the time allowing aircraft to switch to the second community by the first community, the first cell base station issues described switching command, wherein, described switching command can be carried in the physical channel reconfiguration message that the first cell base station issues and send to aircraft, to start handoff procedure.
The first cell base station is after sending described switching command, can also further send packet sequence numbering state (SN Status Transfer) information to the second cell base station, and forward the downlink data packet of described aircraft to the second cell base station, with the preparation of switching.
After above-mentioned steps 42, if extremely described the second community of described aircraft successful switch, said method can also comprise the following steps:
Step 43, the first cell base station receives the resource release message that the second cell base station sends, and discharges the resource relevant to described aircraft.
In above-mentioned flow process, the first cell base station (being source base station) is receiving after the measurement report of aircraft, as prior art, do not send handover request to the second cell base station (being object base station), but directly send switching command to aircraft (being terminal UE), the second cell base station (being object base station) is also without sending Handover Request Acknowledge to the first cell base station (being source base station), but the access request sending according to aircraft realizes the switching of aircraft by the first community, community to the second, thereby greatly simplify hand off signaling flow process, and then can avoid occurring in handoff procedure the probability of RLF, improve handover success rate.
Please refer to Fig. 5, the angle of (i.e. the second cell base station) from object base station, the changing method of aircraft in the air-ground LTE system that the embodiment of the present invention provides, comprises the following steps:
Step 51, the second cell base station receives packet sequence numbering state (SNStatus Transfer) information that the first cell base station sends, described SN Status Transfer information is that the first cell base station is sending to the second cell base station after aircraft sends switching command, described switching command is to send after the first cell base station receives the measurement report of the second community that aircraft reports during lower than default thresholding at the signal quality of the first community, wherein the first community is the current service cell of aircraft, and the second community is the adjacent cell of the first community;
Step 52, the second cell base station receives the downlink data packet of the described aircraft of the first cell base station forwarding;
Step 53, the second cell base station receives the access request that described aircraft is initiated according to the configuration information of the second community obtaining in advance, and described aircraft is switched to described the second community.
At described aircraft successful switch, to after described the second community, said method can also comprise:
Step 54, the second cell base station sends resource release message to the first cell base station, triggers described the first cell base station and discharges the resource relevant to described aircraft.
Please refer to Fig. 6, from the angle of terminal (being aircraft), the changing method of aircraft in the air-ground LTE system that the embodiment of the present invention provides, comprises the following steps:
Step 61, aircraft is at the signal quality of the first community during lower than default thresholding, measure and obtain the measurement report of the second community and report to the first cell base station, wherein the first cell base station is the base station under the first community, the first community is the current service cell of described aircraft, and the second community is the adjacent cell of the first community;
Step 62, aircraft receives described the first cell base station and is receiving the switching command sending after described measurement report;
Step 63, aircraft, according to described switching command, utilizes the configuration information of the second community obtaining in advance to switch to described the second community.
In the present embodiment, can also give in advance the unique UE CONTEXT(UE context of aircraft configuration) and send to all base stations in flight path.Like this, if Radio Link Failure occurs described aircraft in handoff procedure, described method also comprises:
Step 64, the configuration information of the second community that described aircraft utilization obtains in advance, directly initiates to the second community the request of rebuilding, and again accesses described the second community.Now, rebuild in request and carry pre-configured UE CONTEXT, the second community receives after this reconstruction request, can realize according to this UECONTEXT the access of aircraft.
The switching flow of the embodiment of the present invention has below been described from source base station, object base station and aircraft angle respectively.Further combined with Fig. 7, the overall procedure that the embodiment of the present invention is switched is described below.In Fig. 7, UE represents aircraft, and S-eNB represents the first cell base station (being source base station), and T-eNB represents the second cell base station (being object base station).As shown in Figure 7, the switching flow of the present embodiment comprises the following steps:
701, the starting stage, the Serving cell of UE is the community that S-eNB is corresponding, the user data package (User Packet Data DL/UP) of UE and S-eNB exchange up-downgoing;
702, UE detects that Serving cell signal quality is when pre-conditioned, and according to the community configured information on the flight path obtaining in advance, the neighbor cell to Serving cell on flight path is measured, and obtains measurement report, and reports S-eNB;
The measurement report that 703, S-eNB reports according to UE, judges whether to need to carry out to switch, and in the time that needs switch, by issuing RRC reconfiguration message, notice UE switches to the community that T-eNB is corresponding;
704~705, S-eNB is by the SN Status Transfer(packet sequence numbering of UE) state information and downlink data packet turn to T-eNB;
706, UE receives after above-mentioned reconfiguration message, synchronizes and processes with T-eNB, carries out community access by RACH;
707, UE reshuffles complete message by RRC and sends and switch confirmation to T-eNB, and indicating target eNB can send data to UE;
708~709, T-eNB sends a PATH SWITCH information to MME, and notice MME UE has changed Serving cell; MME confirms PATH SWITCH information by PATH SWITCH ACK;
The user data package (User Packet Data DL/UP) of 710, UE and T-eNB exchange up-downgoing;
711, T-eNB is by sending RELEASE RESOURCE, and notice S-eNB handover success, indicates S-eNB to discharge related resource.
The present embodiment also provides and in air-ground LTE system, has realized the base station of above-mentioned each flow process, the structure of aircraft, described air-ground LTE system includes multiple base stations and aircraft, the flight path of described aircraft is covered by the community of multiple base stations, and described aircraft obtains the configuration information of the multiple communities that cover described flight path in advance.
Wherein, the first cell base station that the embodiment of the present invention provides comprises:
Receiving element, for receiving the measurement report of the second community that aircraft reports, wherein, the first cell base station is the base station under the first community, described the first community is the current service cell of described aircraft, described the second community is the adjacent cell of the first community, and to be described aircraft measure during lower than default thresholding at the signal quality of the first community described measurement report obtains;
Switch control unit, for receiving after described measurement report at described receiving element, sends switching command to described aircraft, and the configuration information of controlling the second community that described aircraft utilization obtains in advance switches to described the second community.
Preferably, above-mentioned the first cell base station can also comprise: transmitting element, for after described switch control unit sends described switching command, send packet sequence numbering state SN Status Transfer information to the second cell base station, and forward the downlink data packet of described aircraft to the second cell base station.
Preferably, above-mentioned the first cell base station can also comprise: releasing unit, for receive the second cell base station at described aircraft successful switch the resource release message to transmission after described the second community, discharge the resource relevant to described aircraft.
The second cell base station that the embodiment of the present invention provides comprises:
The first receiving element, the packet sequence numbering state SN Status Transfer information sending for receiving the first cell base station, described SN Status Transfer information is that the first cell base station is sending to the second cell base station after aircraft sends switching command, described switching command is to send after the first cell base station receives the measurement report of the second community that aircraft reports during lower than default thresholding at the signal quality of the first community, wherein the first community is the current service cell of aircraft, and the second community is the adjacent cell of the first community;
The second receiving element, the downlink data packet of described aircraft forwarding for receiving the first cell base station;
Access unit, the access request of initiating according to the configuration information of the second community obtaining in advance for receiving described aircraft, switches to described the second community by described aircraft.
Preferably, above-mentioned the second cell base station also comprises:
Releasing unit, at described aircraft successful switch to after described the second community, send resource release message to the first cell base station, trigger described the first cell base station and discharge the resource relevant to described aircraft.
The aircraft that the embodiment of the present invention provides comprises:
Measuring unit, for at the signal quality of the first community during lower than default thresholding, measure and obtain the measurement report of the second community and report to the first cell base station, wherein the first cell base station is the base station under the first community, the first community is the current service cell of described aircraft, and the second community is the adjacent cell of the first community;
Receiving element, is receiving for receiving described the first cell base station the switching command sending after described measurement report;
Switch unit, for according to described switching command, utilizes the configuration information of the second community obtaining in advance to switch to described the second community.
Preferably, above-mentioned aircraft also comprises:
Access unit, for when described aircraft is in the time that Radio Link Failure occurs handoff procedure, utilizes the configuration information of the second community obtaining in advance, directly initiates to the second community the request of rebuilding, and again accesses described the second community.
Finally, the embodiment of the present invention also provides a kind of air-ground LTE system, comprises above described the first cell base station, the second cell base station and aircraft.
To sum up, the embodiment of the present invention can be simplified the switching flow in air-ground LTE system, reduces the probability that in handoff procedure, RLF occurs, and improves handover success rate.
Many functional parts described in this specification are all called as unit, to emphasize more especially the independence of its implementation.
In the embodiment of the present invention, unit can be realized with software, to carried out by various types of processors.For instance, the executable code unit of a mark can comprise one or more physics or the logical block of computer instruction, and for instance, it can be built as object, process or function.However, the executable code of institute's identify unit is without being physically located in together, but can comprise and be stored in different different instructions physically, in the time combining in these command logics, and its Component units and realize the regulation object of this unit.
In fact, executable code unit can be individual instructions or many instructions, and even can be distributed on multiple different code segments, is distributed in the middle of distinct program, and crosses over multiple memory devices distributions.Similarly, operating data can be identified in unit, and can realize and be organized in the data structure of any suitable type according to any suitable form.Described operating data can be used as individual data collection and is collected, or can be distributed on diverse location and (be included in different storage device), and can only be present on system or network as electronic signal at least in part.
Can utilize software to realize during in unit, consider the level of existing hardware technique, so the unit that can realize with software, in the situation that not considering cost, those skilled in the art can build corresponding hardware circuit and realize corresponding function, and described hardware circuit comprises conventional ultra-large integrated (VLSI) circuit or gate array and the existing semiconductor such as logic chip, transistor or other discrete element.Programmable hardware device can also be used in unit, realizations such as field programmable gate array, programmable logic array, programmable logic device.
The above is only embodiments of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (16)

1. the changing method of aircraft in an air-ground LTE system, described air-ground LTE system includes multiple base stations and aircraft, it is characterized in that, the flight path of described aircraft is covered by the community of multiple base stations, and in advance the configuration information of the multiple communities that cover described flight path is handed down to described aircraft;
Described changing method comprises:
The measurement report of the second community that the first cell base station reception aircraft reports, wherein, the first cell base station is the base station under the first community, described the first community is the current service cell of described aircraft, described the second community is the adjacent cell of the first community, and to be described aircraft measure during lower than default thresholding at the signal quality of the first community described measurement report obtains;
Described the first cell base station receives after described measurement report, sends switching command to described aircraft, and the configuration information of controlling the second community that described aircraft utilization obtains in advance switches to described the second community.
2. the method for claim 1, it is characterized in that, described the first cell base station is after sending described switching command, further send packet sequence numbering state SN Status Transfer information to the second cell base station, and forward the downlink data packet of described aircraft to the second cell base station.
3. the method for claim 1, is characterized in that,
At described aircraft successful switch, to after described the second community, described method also comprises:
Described the first cell base station receives the resource release message that the second cell base station sends, and discharges the resource relevant to described aircraft.
4. the method for claim 1, is characterized in that,
The configuration information of multiple communities of described flight path comprises: the community ID of described multiple communities, the random access channel resource assignment information of each community, measurement configuration parameter and random access lead code.
5. the changing method of aircraft in an air-ground LTE system, described air-ground LTE system includes multiple base stations and aircraft, it is characterized in that, the flight path of described aircraft is covered by the community of multiple base stations, and in advance the configuration information of the multiple communities that cover described flight path is handed down to described aircraft;
Described changing method comprises:
The second cell base station receives the packet sequence numbering state SN Status Transfer information that the first cell base station sends, described SN Status Transfer information is that the first cell base station is sending to the second cell base station after aircraft sends switching command, described switching command is to send after the first cell base station receives the measurement report of the second community that aircraft reports during lower than default thresholding at the signal quality of the first community, wherein the first community is the current service cell of aircraft, and the second community is the adjacent cell of the first community;
The second cell base station receives the downlink data packet of the described aircraft of the first cell base station forwarding;
The second cell base station receives the access request that described aircraft is initiated according to the configuration information of the second community obtaining in advance, and described aircraft is switched to described the second community.
6. method as claimed in claim 5, is characterized in that,
At described aircraft successful switch, to after described the second community, described method also comprises:
Described the second cell base station sends resource release message to the first cell base station, triggers described the first cell base station and discharges the resource relevant to described aircraft.
7. the changing method of aircraft in an air-ground LTE system, described air-ground LTE system includes multiple base stations and aircraft, it is characterized in that, the flight path of described aircraft is covered by the community of multiple base stations, and in advance the configuration information of the multiple communities that cover described flight path is handed down to described aircraft;
Described changing method comprises:
Described aircraft is at the signal quality of the first community during lower than default thresholding, measure and obtain the measurement report of the second community and report to the first cell base station, wherein the first cell base station is the base station under the first community, the first community is the current service cell of described aircraft, and the second community is the adjacent cell of the first community;
Described aircraft receives described the first cell base station and is receiving the switching command sending after described measurement report;
Described aircraft, according to described switching command, utilizes the configuration information of the second community obtaining in advance to switch to described the second community.
8. method as claimed in claim 7, is characterized in that,
If Radio Link Failure occurs described aircraft in handoff procedure, described method also comprises:
The configuration information of the second community that described aircraft utilization obtains in advance, directly initiates to the second community the request of rebuilding, and again accesses described the second community.
9. the first cell base station in an air-ground LTE system, described air-ground LTE system includes multiple base stations and aircraft, it is characterized in that, the flight path of described aircraft is covered by the community of multiple base stations, and described aircraft obtains the configuration information of the multiple communities that cover described flight path in advance;
Described the first cell base station comprises:
Receiving element, for receiving the measurement report of the second community that aircraft reports, wherein, the first cell base station is the base station under the first community, described the first community is the current service cell of described aircraft, described the second community is the adjacent cell of the first community, and to be described aircraft measure during lower than default thresholding at the signal quality of the first community described measurement report obtains;
Switch control unit, for receiving after described measurement report at described receiving element, sends switching command to described aircraft, and the configuration information of controlling the second community that described aircraft utilization obtains in advance switches to described the second community.
10. the first cell base station as claimed in claim 9, is characterized in that, also comprises:
Transmitting element, for after described switch control unit sends described switching command, sends packet sequence numbering state SN Status Transfer information to the second cell base station, and forwards the downlink data packet of described aircraft to the second cell base station.
11. the first cell base stations as claimed in claim 9, is characterized in that,
Releasing unit, for receive the second cell base station at described aircraft successful switch the resource release message to transmission after described the second community, discharge the resource relevant to described aircraft.
The second cell base station in 12. 1 kinds of air-ground LTE systems, described air-ground LTE system includes multiple base stations and aircraft, it is characterized in that, the flight path of described aircraft is covered by the community of multiple base stations, and described aircraft obtains the configuration information of the multiple communities that cover described flight path in advance;
Described the second cell base station comprises:
The first receiving element, the packet sequence numbering state SN Status Transfer information sending for receiving the first cell base station, described SN Status Transfer information is that the first cell base station is sending to the second cell base station after aircraft sends switching command, described switching command is to send after the first cell base station receives the measurement report of the second community that aircraft reports during lower than default thresholding at the signal quality of the first community, wherein the first community is the current service cell of aircraft, and the second community is the adjacent cell of the first community;
The second receiving element, the downlink data packet of described aircraft forwarding for receiving the first cell base station;
Access unit, the access request of initiating according to the configuration information of the second community obtaining in advance for receiving described aircraft, switches to described the second community by described aircraft.
13. the second cell base stations as claimed in claim 12, is characterized in that, also comprise:
Releasing unit, at described aircraft successful switch to after described the second community, send resource release message to the first cell base station, trigger described the first cell base station and discharge the resource relevant to described aircraft.
Aircraft in 14. 1 kinds of air-ground LTE systems, described air-ground LTE system also includes multiple base stations, it is characterized in that, the flight path of described aircraft is covered by the community of multiple base stations, and described aircraft obtains the configuration information of the multiple communities that cover described flight path in advance;
Described aircraft comprises:
Measuring unit, for at the signal quality of the first community during lower than default thresholding, measure and obtain the measurement report of the second community and report to the first cell base station, wherein the first cell base station is the base station under the first community, the first community is the current service cell of described aircraft, and the second community is the adjacent cell of the first community;
Receiving element, is receiving for receiving described the first cell base station the switching command sending after described measurement report;
Switch unit, for according to described switching command, utilizes the configuration information of the second community obtaining in advance to switch to described the second community.
15. aircraft as claimed in claim 14, is characterized in that, also comprise:
Access unit, for when described aircraft is in the time that Radio Link Failure occurs handoff procedure, utilizes the configuration information of the second community obtaining in advance, directly initiates to the second community the request of rebuilding, and again accesses described the second community.
16. 1 kinds of air-ground LTE systems, is characterized in that, comprising:
The first cell base station as described in claim 9 to 11 any one;
The second cell base station as described in claim 12 to 13 any one; And,
Aircraft as described in claim 14 to 15 any one.
CN201310084122.9A 2013-03-15 2013-03-15 Aircraft switching method in ground-air long term evolution system, and base station and aircraft Pending CN104053197A (en)

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Application publication date: 20140917