CN109803340A

CN109803340A - Method for message transmission, user equipment, base station and computer readable storage medium

Info

Publication number: CN109803340A
Application number: CN201711148128.2A
Authority: CN
Inventors: 张丽
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2017-11-17
Filing date: 2017-11-17
Publication date: 2019-05-24
Anticipated expiration: 2037-11-17
Also published as: CN109803340B; WO2019096293A1

Abstract

This application discloses a kind of method for message transmission, user equipment, base station and computer readable storage mediums, including user equipment to select up-link carrier, and sends random access lead code to base station on the up-link carrier of selection；User equipment receives the accidental access response message from base station, includes the corresponding random access lead code identification information of the accidental access response message and the up-link carrier identification information for being used to indicate the corresponding random access lead code of the accidental access response message in the accidental access response message；User equipment judges whether the accidental access response message is the corresponding accidental access response message of random access lead code that itself sends according to the random access lead code identification information and up-link carrier identification information.The application improves random access success rate by the way that up-link carrier identification information is added in accidental access response message.

Description

Method for message transmission, user equipment, base station and computer readable storage medium

Technical field

The present invention relates to wireless communication technology field more particularly to a kind of method for message transmission, user equipment, base station and meters Calculation machine readable storage medium storing program for executing.

Background technique

5G new wireless (New Radio, NR) is ongoing third generation affiliate (3rd Generation Partnership Project, 3GPP) research project, it is determined that being based on orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) new radio open standard, and next generation mobile networks will be become Basis.During current 5G standard discussion, primary concern is that only one up-link carrier of cell and a downlink carry The scene of wave, for the cell random access procedure under the scene, due to only one up-link carrier and a descending carrier, because The process of carrier wave selection is not present in this, also would not select the problem of unsuccessfully causing random access failure because of carrier wave.

But when cell is there are when multiple up-link carriers, at this point, with the presence of the corresponding descending carrier of up-link carrier, have Up-link carrier be not present corresponding descending carrier, for example, it is assumed that network side is configured with 2 up-link carriers: F1, F2,1 downlink Carrier wave F3, wherein F2 and F3 is respectively corresponding uplink and downlink carrier wave, and F2 and F3 can be pairs of (Paired), It can be non-paired (Unpaired) that corresponding descending carrier is not present in F1, and up-link carrier F1 and F2 are configured with to be connect at random Enter channel (Random Access Channel, RACH) resource and Physical Random Access Channel (Physical Random Access Channel, PRACH) resource.After triggering random access, according to the principle that carrier wave selects, some user equipmenies (User Equipment, UE) selects up-link carrier F1 to send leading (Preamble) code, some UE selection up-link carrier F2 hairs Send Preamble code.According to random access radio network in existing long term evolution (Long Term Evolution, LTE) system Temporary identifier (Random Access Radio Network Temporary Identity, RA-RNTI) only considers that time-frequency provides The calculation method in source, when sending the Preamble code of different UE on 2 up-link carriers, calculated RA-RNTI may be identical. For example, when 2 UE select 2 different up-link carriers, but identical time-domain resource is selected, and selected on 2 up-link carriers When corresponding frequency domain resource is also identical, medium access control (Medium Access Control, MAC) layer of 2 UE connects at random Identical RA-RNTI will be used by entering response (Random Access Response, RAR) message.If 5G NR or subsequent net MAC RAR message only includes timing advance order (timing advance command, TAC), uplink (Uplink, UL) in network Authorize (grant) and interim (Temporary) Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (Cell Radio Network Temporary Identifier, C-RNTI), and the lead code that 2 UE are sent is also identical, then the MAC RAR message of 2 UE will be unable to area Point.At this point, if a UE has used the MAC RAR message of another UE, it is likely that will lead to message 3 (Message 3, Msg3 failure) is sent.Therefore, for the scene of this more up-link carriers, exist and how to distinguish RAR message (i.e. message 2 (Message 2, Msg2)) the problem of whether being destined to this UE.

In addition, in handoff scenario, if there are multiple up-link carriers for Target cell, when target BS receives former base station After switching request message, target BS can choose suitable carrier wave, and dedicated RACH resource is distributed on the carrier wave, such as For fruit according to the design of LTE system, dedicated RACH resource is comprising dedicated Preamble code and specifies dedicated PRACH resource. Dedicated RACH resource is passed to former base station by target BS, and former base station passes through wireless heterogeneous networks (Radio Resource Control, RRC) dedicated RACH resource is sent to UE by message.Multiple uplinks after UE is received, in common configuration message A carrier wave access is selected in carrier wave, since target BS does not indicate the carrier wave that dedicated RACH resource uses, UE selection Carrier wave is possible to inconsistent with the carrier wave of target BS selection, at this point, being likely to result in random access failure, and then causes to cut It changes unsuccessfully.

Summary of the invention

In order to solve the above-mentioned technical problems, the present invention provides a kind of method for message transmission, user equipment, base station and calculating Machine readable storage medium storing program for executing can be improved the success rate of random access procedure.

In order to reach the object of the invention, the technical solution of the embodiment of the present invention is achieved in that

The embodiment of the invention provides a kind of method for message transmission, comprising:

User equipment selects up-link carrier, and sends random access lead code to base station on the up-link carrier of selection；

User equipment receives the accidental access response message from base station, includes described in the accidental access response message The corresponding random access lead code identification information of accidental access response message and it is used to indicate the accidental access response message The up-link carrier identification information of corresponding random access lead code；

User equipment judges described random according to the random access lead code identification information and up-link carrier identification information Access response message whether be itself send the corresponding accidental access response message of random access lead code.

Further, the up-link carrier identification information is carrier index number or carrier wave title.

Further, the up-link carrier includes the up-link carrier of auxiliary and the up-link carrier of non-auxiliary.

Further, the carrier index number of the up-link carrier of the non-auxiliary is less than the carrier index of the up-link carrier of auxiliary Number.

Further, the user equipment selection up-link carrier includes:

The carrier wave selection thresholding that the user equipment is indicated according to the base station selects the up-link carrier.

The embodiment of the invention also provides a kind of method for message transmission, comprising:

Base station receives the random access lead code from user equipment, obtains random access lead code identification information and carrying The up-link carrier identification information of the random access lead code；

Base station sends accidental access response message to user equipment, includes described random in the accidental access response message Access lead code identification information and the up-link carrier identification information.

Target BS receives the switching request message at former base station belonging to user equipment, selects up-link carrier, and described Special RACH resource is selected on up-link carrier；

Target BS sends the up-link carrier identification information of the up-link carrier of selection and special RACH resource To former base station.

Former base station sends switching request message to target BS；

Former base station receives up-link carrier identification information and special RACH resource from target BS；

Received up-link carrier identification information and special RACH resource are sent to user equipment by former base station.

User equipment receives the up-link carrier identification information and dedicated random access at the former base station belonging to the user equipment Channel resource, the special RACH resource include dedicated preamble；

User equipment sends dedicated preamble to target base on the up-link carrier that the up-link carrier identification information indicates It stands.

The embodiment of the invention also provides a kind of computer readable storage medium, the computer-readable recording medium storage Have one or more program, one or more of programs can be executed by one or more processor, with realize such as with The step of upper described in any item method for message transmission.

The embodiment of the invention also provides a kind of user equipmenies, including the first sending module, the first receiving module and judgement Module, in which:

First sending module sends random access lead code for selecting up-link carrier, and on the up-link carrier of selection It is to base station, the corresponding random access lead code identification information of the random access lead code of transmission and up-link carrier identification information is defeated Out to judgment module；

First receiving module, for receiving the accidental access response message from base station, the accidental access response message In include that the corresponding random access lead code identification information of the accidental access response message and being used to indicate described connects at random The up-link carrier identification information for entering the corresponding random access lead code of response message, by the random access lead code identification information It exports with up-link carrier identification information to judgment module；

Judgment module, for receiving the random access lead code mark letter of the first sending module and the output of the first receiving module Breath and up-link carrier identification information judge institute according to the random access lead code identification information and up-link carrier identification information State whether random access response is that the corresponding random access response of random access lead code that first sending module is sent disappears Breath.

The embodiment of the invention also provides a kind of base stations, including the second receiving module and the second sending module, in which:

Second receiving module obtains random access lead code for receiving the random access lead code from user equipment Identification information and the up-link carrier identification information for carrying the random access lead code, and the random access lead code is identified Information and up-link carrier identification information are exported to the second sending module；

Second sending module, random access lead code identification information and uplink for receiving the output of the second receiving module carry Wave identification information sends accidental access response message to user equipment, includes described random in the accidental access response message Access lead code identification information and the up-link carrier identification information.

The embodiment of the invention also provides a kind of base stations, receive as the target BS for executing terminal switching, including third Module and third sending module, in which:

Third receiving module selects up-link carrier for receiving the switching request message at former base station belonging to user equipment, And special RACH resource is selected on the up-link carrier, by the up-link carrier identification information of the up-link carrier of selection And special RACH resource is exported to third sending module；

Third sending module, for receiving the up-link carrier identification information and dedicated random access of the output of third receiving module The up-link carrier identification information and special RACH resource are sent to former base belonging to user equipment by channel resource It stands.

The embodiment of the invention also provides a kind of base stations, as the former base station for executing terminal switching, including the 4th transmission mould Block and the 4th receiving module, in which:

4th sending module when for judging that the user equipment needs to switch, sends switching request message to target Base station；The up-link carrier identification information and special RACH resource for receiving the output of the 4th receiving module, by the uplink Carrier identification information and special RACH resource are sent to user equipment；

4th receiving module, for receiving up-link carrier identification information and special RACH from target BS Resource exports the up-link carrier identification information and special RACH resource to the 4th sending module.

The embodiment of the invention also provides a kind of user equipmenies, including the 5th receiving module and the 5th sending module, in which:

5th receiving module, for receiving the up-link carrier identification information at the former base station belonging to the user equipment and dedicated Random access channel resource, the special RACH resource include dedicated preamble, and the up-link carrier is identified and is believed Breath and special RACH resource are sent to the 5th sending module；

5th sending module, for receiving the up-link carrier identification information and dedicated random access of the output of the 5th receiving module Channel resource sends dedicated preamble to target BS on the up-link carrier of up-link carrier identification information instruction.

Technical solution of the present invention has the following beneficial effects:

Method for message transmission, user equipment, base station and computer readable storage medium provided by the invention, by MAC Up-link carrier identification information is added in RAR, so that using in the identical situation of random access lead code identification information (RAPID) Family equipment can judge whether received MAC RAR is the MAC for belonging to this user equipment according to the carrier wave in MAC RAR RAR, to improve random access success rate；

Further, by the way that up-link carrier identification information is added in switching instruction, handover success rate is improved.

Detailed description of the invention

The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:

Fig. 1 is a kind of flow diagram of method for message transmission of first embodiment of the invention；

Fig. 2 is the MAC RAR schematic diagram of the 1 bit carrier index field of addition of the embodiment of the present invention；

Fig. 3 is the MAC RAR schematic diagram of the 2 bit carrier index field of addition of the embodiment of the present invention；

Fig. 4 is a kind of flow diagram of method for message transmission of second embodiment of the invention；

Fig. 5 is a kind of flow diagram of method for message transmission of third embodiment of the invention；

Fig. 6 is a kind of flow diagram of method for message transmission of fourth embodiment of the invention；

Fig. 7 is a kind of flow diagram of method for message transmission of fifth embodiment of the invention；

Fig. 8 is a kind of structural schematic diagram of user equipment of first embodiment of the invention；

Fig. 9 is a kind of structural schematic diagram of base station of first embodiment of the invention；

Figure 10 is a kind of structural schematic diagram of base station of second embodiment of the invention；

Figure 11 is a kind of structural schematic diagram of base station of third embodiment of the invention；

Figure 12 is a kind of structural schematic diagram of user equipment of second embodiment of the invention.

Specific embodiment

To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention Embodiment be described in detail.It should be noted that in the absence of conflict, in the embodiment and embodiment in the application Feature can mutual any combination.

As shown in Figure 1, a kind of method for message transmission according to the present invention, includes the following steps:

Step 101: user equipment selects up-link carrier, and sends random access lead code extremely on the up-link carrier of selection Base station；

Further, the carrier wave that user equipment is indicated according to base station selects thresholding to select up-link carrier.

It should be noted that the present invention, it is emphasized that carried in accidental access response message be used to indicate it is described random The up-link carrier identification information for accessing the corresponding random access lead code of response message, as user equipment how according to configuration door Limit or other schemes select up-link carrier, can be realized by algorithm in the prior art, and the present invention is to this and with no restrictions.

Step 102: user equipment receives the accidental access response message from base station, includes in accidental access response message The corresponding random access lead code identification information of accidental access response message and to be used to indicate accidental access response message corresponding Random access lead code up-link carrier identification information；

Further, up-link carrier identification information is carrier index number (Carrier Index) or carrier wave title.Uplink carries When wave identification information is carrier index, the bit number of occupancy is shorter.

In an embodiment of the present invention, it is assumed that there are 2 up-link carriers for the cell where user equipment: F1, F2, then as schemed Shown in 2, when generating MAC RAR message, the length of the Carrier Index of introducing can be 1 bit, such as F1 carrier index It number be 0, F2 carrier index number is 1.In an alternative embodiment of the invention, it is assumed that there are 4 uplinks for the cell where user equipment Carrier wave: F1, F2, F3, F4, then as shown in figure 3, the length of the Carrier Index of introducing can when generating MAC RAR message Think 2 bits, for example it be 2, F2 carrier index number is that 1, F1 carrier index number is that F4 carrier index number, which is 3, F3 carrier index number, 0。

It should be noted that can be by the reserved field (1 bit) in Fig. 2 or 3, or a field is newly increased to refer to Showing means do not have carrier wave instructions field with the presence or absence of carrier wave instructions field, such as reserved field or the field newly increased for 0, writes down characters in advance Section or the field that newly increases are 1 to mean there is carrier wave instructions field.Only one up-link carrier that existing cell has, some presence Multiple up-link carriers, UE do not know whether carry carrier wave instructions field in the message that base station is sent, therefore, by reserved field or newly Whether include carrier wave instructions field, facilitate the content that UE quickly parses received message if increasing in a field instruction message.

Further, up-link carrier includes uplink (Supplementary Uplink, the SUL) carrier wave and non-auxiliary of auxiliary Uplink (non-SUL) carrier wave.

Specifically, the carrier index number of the up-link carrier of non-auxiliary can be greater than the carrier index of the up-link carrier of auxiliary Number, it might be less that the carrier index number of the up-link carrier of auxiliary.Preferably, the carrier index number of the up-link carrier of non-auxiliary is small In the carrier index number of the up-link carrier of auxiliary.

In an embodiment of the present invention, it is assumed that there are 2 up-link carriers for the cell where user equipment: SUL carrier wave F1, Non-SUL carrier wave F2, then when generating MAC RAR message, it is assumed that the length of the Carrier Index of introducing is 1 bit, then F1 Carrier index number is that 1, F2 carrier index number is 0.

Step 103: user equipment is according to the random access lead code identification information and up-link carrier identification information, judgement Random access response whether be itself send the corresponding accidental access response message of random access lead code.

Specifically, when the random access lead code identification information and up-link carrier identification information in accidental access response message When the random access lead code identification information and up-link carrier identification information all the same that send with itself, user equipment judgement is random The corresponding accidental access response message of random access lead code that access response sends for itself, sends out on the resource location of instruction Send message 3 (Msg3)；When what the random access lead code identification information in accidental access response message was sent with itself connects at random Enter that lead code identification information is inconsistent, or when up-link carrier identification information in accidental access response message and itself sends When up-link carrier identification information is inconsistent, before user equipment judges the random access response not and is the random access that itself sends The corresponding accidental access response message of leading code.

As shown in figure 4, including the following steps: the embodiment of the invention also provides a kind of method for message transmission

Step 401: base station receives the random access lead code from user equipment, obtains random access lead code mark letter Cease and carry the up-link carrier identification information of the random access lead code；

Further, up-link carrier identification information is Carrier Index or carrier wave title.Up-link carrier identification information is When Carrier Index, the bit number of occupancy is shorter.

In an embodiment of the present invention, it is assumed that there are 2 up-link carriers for the cell where user equipment: F1, F2, then as schemed Shown in 2, the length of the Carrier Index can be 1 bit, for example it is 1 that F1 carrier index number, which is 0, F2 carrier index number,.

In an alternative embodiment of the invention, it is assumed that there are 4 up-link carriers for the cell where user equipment: F1, F2, F3, F4, then as shown in figure 3, the length of the Carrier Index can be 2 bits, for example F4 carrier index number is 3, F3 carrier wave It is 1, F1 carrier index number is 0 that call number, which is 2, F2 carrier index number,.

Further, up-link carrier includes the up-link carrier of auxiliary and the up-link carrier of non-auxiliary.

Preferably, the carrier index number of the up-link carrier of non-auxiliary is less than the carrier index number of the up-link carrier of auxiliary.

Step 402: base station sends accidental access response message to user equipment, includes random in accidental access response message Access lead code identification information and the up-link carrier identification information.

Specifically, after user equipment receives accidental access response message, according in accidental access response message with Machine access lead code identification information and up-link carrier identification information judge whether random access response is connecing at random for itself transmission Enter the corresponding accidental access response message of lead code.

As shown in figure 5, including the following steps: the embodiment of the invention also provides a kind of method for message transmission

Step 501: target BS receives the switching request message at former base station belonging to user equipment, selects up-link carrier, And dedicated RACH resource is selected on the up-link carrier；

It is worth noting that downlink measurements selection target base station of the former base station belonging to user equipment according to adjacent area, After choosing target BS, by switching request message transmission to target BS.If there are multiple uplinks to carry for target BS Wave, then needing to select up-link carrier after receiving switching request message.When target BS selects up-link carrier, it may be considered that It is selected according to the size for comparing the downlink measurements that former base station passes over and preset threshold value, it is also contemplated that according to The connection reliability of carrier wave selects；It selects to close alternatively, it is also possible to the uplink signal at the former base station measured according to target BS Suitable up-link carrier.

Step 502: target BS sends out the up-link carrier identification information of the up-link carrier of selection and dedicated RACH resource It send to former base station.

Further, the up-link carrier of the up-link carrier of selection is identified letter by X2, eX2 or Xn interface by target BS Breath and dedicated RACH resource are sent to former base station.

In an embodiment of the present invention, it is assumed that there are 2 up-link carriers for the cell where user equipment: F1, F2, then in life When at switch acknowledgment message, the length of the Carrier Index of introducing can be 1 bit, for example F1 carrier index number is 0, F2 Carrier index number is 1.

In an alternative embodiment of the invention, it is assumed that there are 4 up-link carriers for the cell where user equipment: F1, F2, F3, F4, then when generating switch acknowledgment message, the length of the Carrier Index of introducing can be 2 bits, such as F4 carrier index It number be 3, F3 carrier index number be 2, F2 carrier index number be 1, F1 carrier index number is 0.

It should be noted that since MAC RAR message has specific format, and as shown in Figures 2 and 3, existing RAR disappears There are 1 reserved fields in breath, and carrier wave instructions field can be indicated whether by reserved field.For handoff procedure, cutting The field for changing confirmation message addition carrier wave carrier index, is defined as optional (Optional).Further, on Row carrier wave includes SUL carrier wave and non-SUL carrier wave.

Preferably, the carrier index number of non-SUL carrier wave is less than the carrier index number of SUL carrier wave.

In an embodiment of the present invention, it is assumed that there are 2 up-link carriers for the cell where user equipment: SUL carrier wave F1, Non-SUL carrier wave F2, then when generating switch acknowledgment message, it is assumed that the length of the Carrier Index of introducing is 1 bit, then F1 carrier index number is that 1, F2 carrier index number is 0.

As shown in fig. 6, including the following steps: the embodiment of the invention also provides a kind of method for message transmission

Step 601: former base station sends switching request message to target BS；

It is worth noting that downlink measurements selection target base station of the former base station belonging to user equipment according to adjacent area, After choosing target BS, by switching request message transmission to target BS.

Step 602: former base station receives up-link carrier identification information and dedicated RACH resource from target BS；

Further, former base station receives the up-link carrier identification information from target BS by X2, eX2 or Xn interface And dedicated RACH resource.

In an embodiment of the present invention, it is assumed that there are 2 up-link carriers for the cell where user equipment: F1, F2, then as schemed Shown in 2, when generating switch acknowledgment message, the length of the Carrier Index of introducing can be 1 bit, such as F1 carrier wave rope Quotation marks are that 0, F2 carrier index number is 1.

Further, up-link carrier includes SUL carrier wave and non-SUL carrier wave.

Step 603: received up-link carrier identification information and dedicated RACH resource are sent to user equipment by former base station.

It is worth noting that being selected after user equipment receives up-link carrier identification information and dedicated RACH resource Up-link carrier on send the dedicated Preamble code that includes in dedicated RACH resource to target BS.

Further, former base station is by radio resource control information by received up-link carrier identification information and dedicated RACH resource is sent to the user equipment.

As shown in fig. 7, the embodiment of the invention also provides a kind of method for message transmission, comprising:

Step 701: user equipment receives the up-link carrier identification information at the former base station belonging to the user equipment and dedicated RACH resource, the dedicated RACH resource include dedicated preamble；

Further, the up-link carrier identification information at former base station and dedicated RACH resource are carried on wireless heterogeneous networks and disappear In breath.

In an embodiment of the present invention, it is assumed that there are 2 up-link carriers for the cell where user equipment: F1, F2, then in nothing The length of the Carrier Index introduced in line Resource Control Message can be that 1 bit, such as F1 carrier index number carry for 0, F2 Wave call number is 1.

In an alternative embodiment of the invention, it is assumed that there are 4 up-link carriers for the cell where user equipment: F1, F2, F3, The length of F4, then the Carrier Index introduced in radio resource control information can be 2 bits, such as F4 carrier index It number be 3, F3 carrier index number be 2, F2 carrier index number be 1, F1 carrier index number is 0.

Further, up-link carrier includes SUL carrier wave and non-SUL carrier wave.

In an embodiment of the present invention, it is assumed that there are 2 up-link carriers for the cell where user equipment: SUL carrier wave F1, Non-SUL carrier wave F2 assumes that the length of the Carrier Index introduced is 1 bit, then F1 carrier wave rope in switch acknowledgment message Quotation marks are that 1, F2 carrier index number is 0.

Step 702: user equipment sends dedicated preamble to mesh on the up-link carrier that up-link carrier identification information indicates Mark base station.

It should be noted that generating MAC RAR message, and be sent to user and set after target BS receives dedicated preamble It is standby.

As shown in figure 8, the embodiment of the invention also provides a kind of user equipment, including the first sending module 801, first connect Receive module 802 and judgment module 803, in which:

First sending module 801 sends random access preamble for selecting up-link carrier, and on the up-link carrier of selection Code is to base station, by the corresponding random access lead code identification information of the random access lead code of transmission and up-link carrier identification information It exports to judgment module 803；

First receiving module 802, for receiving the accidental access response message from base station, the random access response disappears It include the corresponding random access lead code identification information of accidental access response message and being used to indicate random access response in breath The up-link carrier identification information of the corresponding random access lead code of message, by random access lead code identification information and up-link carrier Identification information is exported to judgment module 803；

Judgment module 803, before receiving the random access that the first sending module 801 and the first receiving module 802 export Leading code identification information and up-link carrier identification information, according to random access lead code identification information and up-link carrier identification information, Judge whether random access response is that the corresponding random access response of random access lead code that the first sending module 801 is sent disappears Breath.

Further, the carrier wave that the first sending module 801 is indicated according to base station selects thresholding to select up-link carrier.

It should be noted that the present invention, it is emphasized that carried in accidental access response message be used to indicate it is described random The up-link carrier identification information for accessing the corresponding random access lead code of response message, as the first sending module 801 how root Select up-link carrier according to configured threshold or other schemes, can be realized by algorithm in the prior art, the present invention to this simultaneously With no restrictions.

As shown in figure 9, the embodiment of the invention also provides a kind of base station, including the second receiving module 901 and second is sent Module 902, in which:

Second receiving module 901 obtains random access preamble for receiving the random access lead code from user equipment The up-link carrier identification information of code identification information and carrying random access lead code, and by random access lead code identification information and Up-link carrier identification information is exported to the second sending module 902；

Second sending module 902, for receive the second receiving module 901 output random access lead code identification information and Up-link carrier identification information, sends accidental access response message to user equipment, include in accidental access response message it is described with Machine access lead code identification information and the up-link carrier identification information.

As shown in Figure 10, the embodiment of the invention also provides a kind of base stations, as the target BS for executing terminal switching, packet Include third receiving module 1001 and third sending module 1002, in which:

Third receiving module 1001 selects uplink for receiving the switching request message at former base station belonging to user equipment Carrier wave, and dedicated RACH resource is selected on the up-link carrier, by the up-link carrier identification information of the up-link carrier of selection And dedicated RACH resource is exported to third sending module 1002；

Third sending module 1002, for receiving the up-link carrier identification information and dedicated of the output of third receiving module 1001 RACH resource, the up-link carrier identification information and dedicated RACH resource are sent to former base station belonging to user equipment.

Further, up-link carrier includes SUL carrier wave and non-SUL carrier wave.

As shown in figure 11, the embodiment of the invention also provides a kind of base stations, as the former base station for executing terminal switching, including 4th sending module 1101 and the 4th receiving module 1102, in which:

4th sending module 1101 when for judging that the user equipment needs to switch, sends switching request message extremely Target BS；The up-link carrier identification information and dedicated RACH resource that the 4th receiving module 1102 exports are received, on described Row carrier identification information and dedicated RACH resource are sent to user equipment；

4th receiving module 1102, for receiving up-link carrier identification information and dedicated RACH money from target BS Source exports the up-link carrier identification information and dedicated RACH resource to the 4th sending module 1101.

It is worth noting that the 4th sending module 1101 is being selected according to the downlink measurements selection target base station of adjacent area After having selected target BS, by switching request message transmission to target BS.

Further, the 4th receiving module 1102 is received the uplink from target BS and is carried by X2, eX2 or Xn interface Wave identification information and dedicated RACH resource.

Further, up-link carrier includes SUL carrier wave and non-SUL carrier wave.

Further, the 4th sending module 1101 passes through radio resource control information for received up-link carrier identification information And dedicated RACH resource is sent to the user equipment.

As shown in figure 12, the embodiment of the invention also provides a kind of user equipmenies, including the 5th receiving module 1201 and Five sending modules 1202, in which:

5th receiving module 1201, for receive the former base station belonging to the user equipment up-link carrier identification information and Dedicated RACH resource, the dedicated RACH resource includes dedicated preamble, by the up-link carrier identification information and dedicated RACH resource be sent to the 5th sending module 1202；

5th sending module 1202, for receiving the up-link carrier identification information and dedicated of the 5th receiving module 1201 output RACH resource send dedicated preamble to target BS on the up-link carrier of up-link carrier identification information instruction.

Further, up-link carrier includes SUL carrier wave and non-SUL carrier wave.

The embodiment of the invention also provides several preferred embodiments, and the present invention is further expalined, but is worth note Meaning, the preferred embodiment are intended merely to preferably describe the present invention, do not constitute and improperly limit the present invention.Following Each embodiment can be individually present, and the technical characterstic in different embodiment can combine to combine in one embodiment and make With.

For there are the random access procedures of the scene of multiple up-link carriers, according to the calculating side of RA-RNTI in LTE system Case, and MAC RAR message content only includes TAC, UL Grant and Temporary C-RNTI, as the same cell difference UE Select different carrier waves in identical time-domain position, corresponding frequency domain position is also identical, and when sending identical Preamble code, MAC RAR cannot be distinguished in UE, and will lead to random access failure.In order to solve this problem, it may be considered that in MAC RAR message Carrier Index is added to distinguish different carrier waves.

For switching, there are the scenes of multiple up-link carriers for Target cell, since target BS only indicates dedicated RACH money Source, the carrier wave that the carrier wave of such UE selection may be selected with target BS is inconsistent and causes random access failure, that is, cuts It changes unsuccessfully.In order to solve this problem, it may be considered that target BS is in addition to indicating dedicated RACH resource, it is also necessary to indicate Carrier。

Base station can configure multiple up-link carriers to UE by the common configuration in system message or RRC information, and And each up-link carrier has oneself corresponding uplink to configure, such as RACH common configuration (Common Configuration), PRACH resource distribution (Resource Configuration) and UL power control (Power Control) common configuration etc..It is false If base station configures 2 up-link carriers F1 and F2, a descending carrier F3, wherein F2 and F3 is pairs of or non-paired carrier wave.UE1 root According to configured threshold or other Scheme Choice up-link carriers F1；UE2 is according to configured threshold or other Scheme Choice up-link carriers F2.

Here, the time-domain position of UE1 selection is identical as UE2, and has selected corresponding frequency domain resource position, has sent Identical Preamble code.After base station receives the Preamble code of UE1 and UE2, if according to the meter of RA-RNTI in LTE system Calculation scheme, then the RA-RNTI calculated result of 2 UE be it is identical, generating MAC RAR, in addition to TAC, UL Grant and Temporary C-RNTI, it is also necessary to include a field, such as Carrier Index, for distinguishing the MAC of different carrier waves The MAC RAR of RAR, two UE are multiplexed together, and issue UE by the same downlink resource.

Wherein, increased field Carrier Index is used to refer to the MAC RAR of which carrier wave, for example, UE1 use it is upper Row carrier wave F1 can add the Carrier Index of F1 in MAC RAR；The up-link carrier F2 that UE2 is used, in MAC RAR Add the Carrier Index of F2.

After UE1 is received, parsing random access lead code ID (RAPID) first, since the RAPID of UE1 and UE2 is identical, Therefore, it can't judge the MAC RAR for whether belonging to this UE.Continue to solve parsing MAC RAR, if it find that including in MAC RAR Carrier indication field, and carrier wave F1 is indicated, then UE1 thinks that MAC RAR is received successfully.Resource location of the UE1 in instruction Upper transmission Msg3；For UE2, parsing RAPID (Preamble Index) is identical, equally, continues to solve parsing MAC RAR, such as There are carrier wave instructions field, and carrier wave instructions field indication carrier wave F2 in fruit MAC RAR, then it is assumed that MAC RAR is received successfully, is being indicated Resource location on send Msg3.

For there are the random access procedures of multiple up-link carriers, if the indication carrier wave in MAC RAR message, UE Upon receipt, in the identical situation of RAPID, the MAC for belonging to this UE can be judged according to the carrier wave in MAC RAR RAR sends Msg3 on the carrier wave of instruction, can be improved random access success rate.

For handoff procedure, former base station is according to the downlink measurements selection target base station of adjacent area.Choosing target base After standing, by switching request message transmission to target BS.If target BS is cut there are multiple up-link carriers receiving After changing request, need to select uplink carrier wave.

Wherein, up-link carrier selection scheme is it is contemplated that the downlink measurements and thresholding passed over according to former base station Value relatively selects, and can also be selected according to the connection reliability of carrier wave；Alternatively, it is also possible to the original measured according to target BS The uplink signal of base station selects suitable access carrier.

After target BS chooses access carrier, dedicated RACH resource is selected on access carrier, it, will after choosing Dedicated RACH resource and the carrier wave of selection pass to former base station together, and former base station again leads to the carrier wave of dedicated RACH resource and selection It crosses RRC information and is allocated to UE.

After UE is received, according to the configuration of base station, dedicated Preamble code is sent on the carrier wave of instruction.

The case where there are multiple up-link carriers for switching target small area, if instruction sends the load of dedicated preamble code Wave, then can also improve handover success rate.

Preferred embodiment 1 (cell there are 2 up-link carrier F1, F2,1 descending carrier F3, F2 and F3 be in pairs or Non-paired carrier wave；UE supports 2 carrier waves；It is initially accessed and rebuilds)

2 up-link carriers F1 and F2 are broadcasted by system message in base station, and descending carrier a F3, F2 and F3 are pairs of or non- Pairs of carrier wave.For 2 up-link carriers F1 and F2, different ascending resources, such as RACH common configuration (Common are broadcasted Configuration), PRACH resource distribution (Resource Configuration) and UL power control (Power Control) common configuration etc..

When triggering initial access or the random access procedure triggered due to reconstruction, need to carry out processing step below It is rapid:

Step 1, UE selects a up-link carrier access according to carrier wave selection principle, and sends on the carrier wave of selection Preamble code；

Step 2, after base station receives Peamble code, since there are 2 up-link carriers for this cell, MAC RAR is being generated When message, need to introduce Carrier Index, for example it is 0 that F1 carrier wave index, which is 1, F2 carrier wave index, needs to increase by one Bit indicates, as shown in Fig. 2.Carrier index field is used to indicate up-link carrier call number (Carrier in attached drawing 2 Index, CI), filling (Padding) field does not represent any useful information, only fills.

Step 3, UE receives the MAC RAR message from base station, can parse according to the format in attached drawing 2, if solution The Carrier Index separated out is consistent with the carrier wave of Preamble code is sent, it is considered that being destined to the MAC RAR of the UE Message, i.e. MAC RAR are received successfully.

Preferred embodiment 2 (cell there are multiple up-link carrier F1, F2, F3 etc., with the presence of up-link carrier it is corresponding Corresponding descending carrier is not present in descending carrier, some；UE supports the up-link carrier of all up-link carrier or 2 or more；Just Begin to access and rebuild)

Multiple up-link carriers are broadcasted by system message in base station, for each up-link carrier, broadcast different ascending resources, Such as RACH Common Configuration, PRACH Resource Configuration and UL Power Control Common Configuration etc..When triggering initial access or the random access procedure triggered due to reconstruction, need Carry out processing step below:

Step 1, UE selects access carrier according to the principle of carrier wave selection, in connecing for selection on the up-link carrier of support Enter transmission Preamble code on carrier wave；

Step 2, after base station receives Preamble code, since there are multiple up-link carriers for this cell, so generating MAC When RAR message, need to introduce Carrier Index.For example, current base station configures 4 up-link carriers, then can increase 2bit To indicate Carrier Index.As shown in Fig. 3, for increasing 2bit field, the structural representation of a MAC RAR is provided Figure.Wherein, carrier index field is used to indicate up-link carrier call number (Carrier Index, CI), is filled (Padding) Field does not represent any useful information, only fills.

Step 3, UE receives the MAC RAR message from base station, can be solved according to the MACRAR format of attached drawing 3 Analysis.If the Carrier Index of parsing is consistent with the carrier wave of Preamble code is sent, it is considered that MAC RAR is received successfully.

Preferred embodiment 3 (cell there are 2 up-link carrier F1, F2,1 descending carrier F3, F2 and F3 be in pairs or Non-paired carrier wave；UE supports 2 carrier waves；Random access procedure under connection status)

Base station is configured with 2 up-link carriers F1 and F2, and descending carrier a F3, F2 and F3 are pairs of or non-paired carrier wave.2 A up-link carrier F1 and F2 has respective common configuration, such as RACH Common Configuration, PRACH Resource Configuration and UL Power Control Common Configuration etc..When uplink has occurred Step-out when having upstream or downstream data to need to send, can trigger random access procedure；Alternatively, when switching over, due to not having Dedicated Preamble code and trigger competition random access procedure.

For the random access procedure of triggering, processing step below is carried out:

Step 1, if before random access, UE carries out uplink using 2 up-link carriers, then being connect at random Before entering, the principle selected according to carrier wave is needed to select a up-link carrier access, and send in the carrier wave of selection Preamble code.If UE is used only a carrier wave and carries out uplink, then UE can choose this before random access triggering Carrier wave sends Preamble code.Or for handoff procedure, UE needs to carry out carrier wave selection according to the carrier wave of common configuration；

Step 2, after base station receives Preamble code, since there are 2 up-link carriers for this cell, so generating MAC When RAR message, need to introduce Carrier Index.Such as it can be using the MAC RAR format in attached drawing 2.Generating MAC After RAR message, base station is sent to UE；

Step 3, UE receives the MAC RAR message from base station, can be solved according to the MAC RAR format in attached drawing 2 Analysis.If the Carrier Index parsed according to the format in attached drawing 2 is consistent with the carrier wave of Preamble code is sent, It is considered that MAC RAR is received successfully.

Preferred embodiment 4 (cell there are multiple up-link carrier F1, F2, F3 etc., with the presence of up-link carrier it is corresponding Corresponding descending carrier is not present in descending carrier, some；UE supports the uplink of all up-link carrier or 2 or more to carry Wave)

Base station is configured with multiple up-link carriers, and each up-link carrier has different common configurations, such as RACH Common Configuration, PRACH Resource Configuration and UL Power Control Common Configuration etc..When uplink loss has occurred, when there are upstream or downstream data to need to send, random access mistake can be triggered Journey.Or when switching over, the random access procedure of triggering due to no dedicated Preamble code.

Step 1, if before random access, UE carries out uplink using multiple up-link carriers, then carrying out at random Before access, the principle selected according to carrier wave is needed to select a up-link carrier access, and send in the carrier wave of selection Preamble code.If UE is used only a carrier wave and carries out uplink, then UE can choose this before random access triggering Carrier wave sends Preamble code.Or for handoff procedure, UE needs to carry out carrier wave selection according to the carrier wave of common configuration.

Step 2, after base station receives Preamble code, since there are multiple up-link carriers for this cell, so generating MAC When RAR message, need to introduce Carrier Index.For example there are 4 up-link carriers, it can be using the MAC RAR in attached drawing 3 Format.After generating MAC RAR message, base station is sent to UE.

Step 3, UE receives the MAC RAR message from base station, can carry out according to the MAC RAR format in attached drawing 3 Parsing.If the Carrier Index parsed is consistent with the carrier wave of Preamble code is sent, it is considered that MAC RAR connects Harvest function.

Preferred embodiment 5 (there are 2 up-link carriers SUL and non-SUL for a cell)

Base station is configured with 2 up-link carriers SUL and non-SUL, and 2 up-link carriers have respective common configuration, such as RACH Common Configuration, PRACH Resource Configuration and UL Power Control Common Configuration etc..UE supports the characteristic of SUL, and supports the band group of SUL and common (Normal) carrier wave It closes (Band Combination).

When triggering initial access or the random access procedure triggered due to reconstruction, step is carried out the following processing:

Step 1, UE selects thresholding to carry out carrier wave selection according to carrier wave, and sends Preamble on the carrier wave of selection Code.

Step 2, after base station receives Preamble code, since there are SUL carrier waves and non-SUL carrier wave for this cell, so When generating MAC RAR message, need to introduce Carrier Index, for example 0 is designated as non-SUL carrier wave, 1 is designated as SUL load Wave.Such as it can be using the MAC RAR format in attached drawing 2.After generating MAC RAR message, base station is sent to UE.

Step 3, UE receives the MAC RAR message from base station, can be solved according to the MACRAR format in attached drawing 2 Analysis.If the Carrier Index parsed according to the format in attached drawing 2 is consistent with the carrier wave of Preamble code is sent, Think that MAC RAR is received successfully.

Preferred embodiment 6 (there are multiple up-link carriers, such as multiple SUL and multiple non-SUL for a cell)

Base station is configured with multiple up-link carriers, for example is configured with multiple SUL and multiple non-SUL, and multiple up-link carriers are all Have a different common configurations, for example, RACH Common Configuration, PRACHResource Configuration and UL Power Control Common Configuration etc..UE supports the characteristic of SUL, and SUL and Normal is supported to carry The Band Combination of wave.When triggering initial access or the random access procedure triggered due to reconstruction, carry out following Processing step:

Step 2, after base station receives Preamble code, since there are multiple up-link carriers for this cell, so generating MAC It when RAR message, needs to introduce Carrier Index, for example multiple non-SUL are ranked up from 0, is finally the carrier wave of SUL index.In addition, it is also necessary to the field that an instruction Carrier Index whether there is.It, can such as there are when 4 up-link carriers Using the MAC RAR format in attached drawing 3.After generating MAC RAR message, base station is sent to UE.

Step 3, UE receives the MAC RAR message from base station, can carry out according to the MAC RAR format in attached drawing 3 Parsing.If the Carrier Index according to the format parsing in attached drawing 3 is consistent with the carrier wave of Preamble code is sent, Think that MAC RAR is received successfully.

(there are 2 up-link carriers SUL and non-SUL for a cell for preferred embodiment 7；UE supports 2 carrier waves；Connect shape Random access procedure under state)

Base station is configured with 2 up-link carriers SUL and non-SUL, and 2 up-link carriers have respective common configuration, such as RACH Common Configuration, PRACH Resource Configuration and UL Power Control Common Configuration etc..UE supports the characteristic of SUL, and supports the Band of SUL and Normal carrier wave Combination.When uplink loss has occurred, when there are upstream or downstream data to need to send, random access procedure can be triggered, or Person, when switching over, the random access procedure of triggering due to no dedicated Preamble code.

Step 1, if before random access, UE carries out uplink using 2 up-link carriers, then being connect at random Before entering, the principle selected according to carrier wave is needed to select a up-link carrier access, and send in the carrier wave of selection Preamble code.If UE is used only a carrier wave and carries out uplink, then UE can choose this before random access triggering Carrier wave sends Preamble code.For handoff procedure, UE needs carry out carrier wave selection according to the carrier wave of common configuration, and are selecting Preamble code is sent on the carrier wave selected.

Step 2, after base station receives Preamble code, since there are SUL carrier waves and non-SUL carrier wave for this cell, so When generating MAC RAR message, need to introduce Carrier Index, for example 0 is designated as non-SUL carrier wave, 1 is designated as SUL load Wave.For example the MAC RAR format of attached drawing 2 can be used.After generating MAC RAR message, base station is sent to UE.

(there are multiple up-link carriers, such as 1 SUL and multiple non-SUL or multiple for a cell for preferred embodiment 8 SUL and multiple non-SUL)

Base station is configured with multiple up-link carriers, for example is configured with 1 SUL and multiple non-SUL, and multiple up-link carriers have Different common configurations, such as RACH Common Configuration, PRACH Resource Configuration and UL Power Control Common Configuration etc..UE supports the characteristic of SUL, and supports SUL and Normal carrier wave Band Combination.When uplink loss has occurred, when there are upstream or downstream data to need to send, random access can be triggered Process.Or when switching over, the random access procedure of triggering due to no dedicated Preamble code.

Step 2, after base station receives Preamble code, since there are multiple up-link carriers for this cell, so generating MAC It when RAR message, needs to introduce Carrier Index, for example multiple non-SUL are ranked up from 0, is finally the carrier wave of SUL index.For example there are when 4 up-link carriers, the MAC RAR format of attached drawing 3 can be used.After generating MAC RAR message, base Station is sent to UE.

Preferred embodiment 9 (there are 2 up-link carriers, handoff procedures for Target cell)

Switching request is sent to target BS according to downlink measurements selection target base station by former base station.If There are 2 up-link carriers, such as SUL carrier wave and non-SUL carrier wave for target BS, and according to the ability of UE, which supports mesh The SUL characteristic of base station is marked, the Band Combination of SUL and Normal carrier wave is supported, then target BS is according to certain originals Suitable carrier wave then is selected, and selects dedicated Preamble code and dedicated PRACH resource on the carrier wave.

Target BS passes to dedicated RACH resource on the carrier wave of selection and the carrier wave of selection by X2/eX2/Xn interface Former base station.After former base station receives, the carrier wave of target BS selection and dedicated RACH resource are sent to UE.

UE sends dedicated Preamble code to target BS on the carrier wave of selection after receiving.

After target BS receives Preamble code, since there are SUL carrier waves and non-SUL carrier wave for this cell, so in life When at MAC RAR message, need to introduce Carrier Index, for example 0 is designated as non-SUL carrier wave, 1 is designated as SUL carrier wave. For example the MAC RAR format of attached drawing 2 can be used.After generating MAC RAR message, target BS is sent to UE.

UE receives the MAC RAR message from target BS, can be parsed according to the MACRAR format in attached drawing 2. If the Carrier Index parsed according to attached drawing 2 is consistent with the carrier wave of Preamble code is sent, it is considered that MAC RAR connects Harvest function.

Preferred embodiment 10 (there are multiple up-link carriers for Target cell)

Switching request is sent to target BS according to downlink measurements selection target base station by former base station.If There are multiple up-link carriers, such as multiple SUL carrier waves and multiple non-SUL carrier waves for target BS, and according to the ability of UE, should The characteristic of UE support section SUL, and support the Band Combination of this part SUL and Normal carrier wave；Or UE branch Whole SUL characteristics is held, and supports the Band Combination of all SUL and Normal carrier waves.So base station is being supported Carrier wave Rigen suitable carrier wave is selected according to certain principles, and select on the carrier wave dedicated Preamble code and dedicated PRACH resource.

After target BS receives Preamble code, since there are multiple up-link carriers for this cell, so generating MAC RAR It when message, needs to introduce Carrier Index, for example multiple non-SUL are ranked up from 0, is finally the carrier wave index of SUL. In addition, it is also necessary to the field that an instruction Carrier Index whether there is.For example it there are when 4 up-link carriers, can use The MAC RAR format of attached drawing 3.After generating MAC RAR message, base station is sent to UE.

Step 3, UE receives the MAC RAR message from target BS, can come according to the MAC RAR format in attached drawing 3 It is parsed.If the Carrier Index according to the format parsing in attached drawing 3 is consistent with the carrier wave of Preamble code is sent, It is considered that MAC RAR is received successfully.

In the application, the technical characteristic in each embodiment can be combined in one embodiment in the absence of conflict Middle use.Each embodiment is only the optimal embodiment of the application, is not used to limit the protection scope of the application.

Those of ordinary skill in the art will appreciate that all or part of the steps in the above method can be instructed by program Related hardware is completed, and described program can store in computer readable storage medium, such as read-only memory, disk or CD Deng.Optionally, one or more integrated circuits also can be used to realize, accordingly in all or part of the steps of above-described embodiment Ground, each module/unit in above-described embodiment can take the form of hardware realization, can also use the shape of software function module Formula is realized.The present invention is not limited to the combinations of the hardware and software of any particular form.

The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.

Claims

1. a kind of method for message transmission characterized by comprising

User equipment receives the accidental access response message from base station, includes described random in the accidental access response message It accesses the corresponding random access lead code identification information of response message and is used to indicate the accidental access response message and correspond to Random access lead code up-link carrier identification information；

User equipment judges the random access according to the random access lead code identification information and up-link carrier identification information Response message whether be itself send the corresponding accidental access response message of random access lead code.

2. method for message transmission according to claim 1, which is characterized in that the up-link carrier identification information is carrier wave rope Quotation marks or carrier wave title.

3. method for message transmission according to claim 2, which is characterized in that the up-link carrier includes that the uplink of auxiliary carries The up-link carrier of wave and non-auxiliary.

4. method for message transmission according to claim 3, which is characterized in that the carrier wave rope of the up-link carrier of the non-auxiliary Quotation marks are less than the carrier index number of the up-link carrier of auxiliary.

5. method for message transmission according to claim 1, which is characterized in that the user equipment selects up-link carrier packet It includes:

6. a kind of method for message transmission characterized by comprising

Base station receives the random access lead code from user equipment, obtains described in random access lead code identification information and carrying The up-link carrier identification information of random access lead code；

Base station sends accidental access response message to user equipment, includes the random access in the accidental access response message Lead code identification information and the up-link carrier identification information.

7. a kind of method for message transmission characterized by comprising

Target BS receives the switching request message at former base station belonging to user equipment, selects up-link carrier, and in the uplink Special RACH resource is selected on carrier wave；

The up-link carrier identification information of the up-link carrier of selection and special RACH resource are sent to original by target BS Base station.

8. a kind of method for message transmission characterized by comprising

Former base station sends switching request message to target BS；

9. a kind of method for message transmission characterized by comprising

User equipment receives the up-link carrier identification information and special RACH at the former base station belonging to the user equipment Resource, the special RACH resource include dedicated preamble；

User equipment sends dedicated preamble to target BS on the up-link carrier that the up-link carrier identification information indicates.

10. a kind of computer readable storage medium, which is characterized in that the computer-readable recording medium storage have one or Multiple programs, one or more of programs can be executed by one or more processor, to realize such as claim 1 to 9 Any one of described in method for message transmission the step of.

11. a kind of user equipment, which is characterized in that including the first sending module, the first receiving module and judgment module, in which:

First sending module sends random access lead code to base for selecting up-link carrier, and on the up-link carrier of selection Stand, by the corresponding random access lead code identification information of the random access lead code of transmission and up-link carrier identification information export to Judgment module；

First receiving module wraps in the accidental access response message for receiving the accidental access response message from base station It includes the corresponding random access lead code identification information of the accidental access response message and is used to indicate the random access and ring The up-link carrier identification information for answering the corresponding random access lead code of message, by the random access lead code identification information and upper Row carrier identification information is exported to judgment module；

Judgment module, for receive the first sending module and the first receiving module output random access lead code identification information and Up-link carrier identification information, according to the random access lead code identification information and up-link carrier identification information, judgement it is described with Whether machine access response is the corresponding accidental access response message of random access lead code that first sending module is sent.

12. a kind of base station, which is characterized in that including the second receiving module and the second sending module, in which:

Second receiving module obtains random access lead code mark for receiving the random access lead code from user equipment Information and the up-link carrier identification information for carrying the random access lead code, and by the random access lead code identification information It exports with up-link carrier identification information to the second sending module；

Second sending module, for receiving the random access lead code identification information and up-link carrier mark of the output of the second receiving module Know information, sends accidental access response message to user equipment, include the random access in the accidental access response message Lead code identification information and the up-link carrier identification information.

13. a kind of base station, as the target BS for executing terminal switching, which is characterized in that including third receiving module and third Sending module, in which:

Third receiving module selects up-link carrier for receiving the switching request message at former base station belonging to user equipment, and Special RACH resource is selected on the up-link carrier, by the up-link carrier identification information of the up-link carrier of selection and specially It is exported with random access channel resource to third sending module；

Third sending module, for receiving the up-link carrier identification information and special RACH of the output of third receiving module The up-link carrier identification information and special RACH resource are sent to former base station belonging to user equipment by resource.

14. a kind of base station, as the former base station for executing terminal switching, which is characterized in that connect including the 4th sending module and the 4th Receive module, in which:

4th sending module when for judging that the user equipment needs to switch, sends switching request message to target BS； The up-link carrier identification information and special RACH resource for receiving the output of the 4th receiving module, by the up-link carrier mark Know information and special RACH resource is sent to user equipment；

4th receiving module, for receiving up-link carrier identification information and special RACH money from target BS Source exports the up-link carrier identification information and special RACH resource to the 4th sending module.

15. a kind of user equipment, which is characterized in that including the 5th receiving module and the 5th sending module, in which:

5th receiving module, for receiving the up-link carrier identification information at the former base station belonging to the user equipment and dedicated random Access channel resource, the special RACH resource includes dedicated preamble, by the up-link carrier identification information and Special RACH resource is sent to the 5th sending module；

5th sending module, for receiving the up-link carrier identification information and special RACH of the output of the 5th receiving module Resource sends dedicated preamble to target BS on the up-link carrier of up-link carrier identification information instruction.