CN102685828B - Changing method and corresponding base station - Google Patents
Changing method and corresponding base station Download PDFInfo
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- CN102685828B CN102685828B CN201110065172.3A CN201110065172A CN102685828B CN 102685828 B CN102685828 B CN 102685828B CN 201110065172 A CN201110065172 A CN 201110065172A CN 102685828 B CN102685828 B CN 102685828B
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Abstract
The present invention relates to the method for making user terminal can switch between work the first base station on the first band of frequencies and work the second base station over a second frequency band and corresponding first base station and the second base station.The method comprising the steps of: described second base station sends reference signal on described first frequency band, so that the described user terminal being operated on described first frequency band can appreciate that the existence of described second base station, and determine need to carry out user terminal from described first base station to the switching of described second base station time, described second base station sends, to described user terminal, the information required for described second base station of being switched to.According to the present invention, when the second base station operation is when being different from the frequency band of frequency band of the first base station, user terminal also is able to switch between the first base station and the second base station.
Description
Technical field
The present invention relates to the communications field.More particularly, the present invention relate to the method so that user terminal can switch between work the first base station on the first band of frequencies and work the second base station over a second frequency band and corresponding first base station and the second base station.
Background technology
Macrocell is disposed Microcell, adds power system capacity and macrocell edge customer data rate.Wherein macrocell is such as basic wireless cellular network community in LTE-A, 3G, GSM, and Microcell is such as pico community, femto community etc..
Owing to Microcell and macrocell share frequency band, in order to obtain systematic function better, it is necessary to solve problem of inter-cell interference.
Power control can be applied or frequency domain/time domain resource divides and solves problem of inter-cell interference.
But, these schemes solving presence of intercell interference will apply compromise between macrocell and Microcell performance, and limit the improvement of total data rate.
In order to increase Microcell capacity further, and do not sacrifice macrocell performance, dynamic spectrum access (DSA) can be applied for Microcell.In other words, the frequency band being different from the frequency band that macrocell uses can be applied in Microcell.
More specifically, when single operator, the Microcell of deployment can use the frequency band of other networks from same operator, to realize better load balance.When multiple operator, the Microcell of an operator can dynamically use the frequency band from other operators under some constraints.In a third case, Microcell can use service spectrum white space, for instance public safety frequency spectrum white space or television spectrum white space, uses rare frequency spectrum resource with more efficient way.
But, DSA introduces switching problem to current system.When Microcell only operates when the frequency band of the frequency band of the macrocell being different from its place from other networks, it can not inform its existence of user terminal entering its overlay area.Therefore, no matter how user terminal is close to this Microcell, can not be switched to this Microcell from macrocell.
As a result, even if user terminal is in picocell coverage area, it still by macrocell, more specifically, serviced by the base station of macrocell, thus results in macrocell overloading.
Summary of the invention
According to the first aspect of the invention, propose a kind of method for making user terminal can switch between work the first base station on the first band of frequencies and work the second base station over a second frequency band, including step: described second base station sends reference signal on described first frequency band, so that the described user terminal being operated on described first frequency band can appreciate that the existence of described second base station, and determine need to carry out user terminal from described first base station to the switching of described second base station time, described second base station sends the information being switched to required for described second base station to described user terminal.
According to the second aspect of the invention, propose a kind of second base station, for making user terminal can switch between work the first base station on the first band of frequencies and work the second base station over a second frequency band, including: reference signal dispensing device, for sending reference signal on described first frequency band, so that the described user terminal being operated on described first frequency band can appreciate that the existence of described second base station, and information transmitting apparatus, for determine need to carry out user terminal from described first base station to the switching of described second base station time, the information being switched to required for described second base station is sent to described user terminal.
According to the third aspect of the invention we, it is proposed that a kind of method for making user terminal can switch between work the first base station on the first band of frequencies and work the second base station over a second frequency band, including step:
By back haul link, receive the information being switched to required for described second base station from the second base station；The information being switched to required for described second base station is forwarded on the first band of frequencies to described user terminal.
According to the fourth aspect of the invention, propose a kind of first base station, for making user terminal can switch between work the first base station on the first band of frequencies and work the second base station over a second frequency band, including: receive device, for by back haul link, receiving the information being switched to required for described second base station from the second base station；Retransmission unit, for forwarding the information being switched to required for described second base station on the first band of frequencies to described user terminal.
According to the present invention, when the second base station operation is when being different from the frequency band of frequency band of the first base station, user terminal also is able to switch between the first base station and the second base station.Present invention improves over the mobile management in the macrocell network with picocell deployment, and therefore enhance the advantage of Microcell.
Accompanying drawing explanation
By the explanation below in conjunction with accompanying drawing, and along with the understanding more comprehensively to the present invention, other purposes of the present invention and effect will become clearer from and it can be readily appreciated that wherein:
Fig. 1 illustrates the environment 100 that the present invention can be implemented within；
Fig. 2 illustrate when the first base station and the second base station operation on the same frequency band time, the process that user terminal switches between which；
Fig. 3 illustrate according to an embodiment of the invention when the first base station and the second base station operation over different frequency bands time, the process that user terminal switches between which；
Fig. 4 illustrate according to another implementation of the invention when the first base station and the second base station operation over different frequency bands time, the process that user terminal switches between which；
Fig. 5 illustrate the further embodiment according to the present invention when the first base station and the second base station operation over different frequency bands time, the process that user terminal switches between which；
Fig. 6 illustrates the block diagram of the second base station according to the embodiment of the present invention；
Fig. 7 illustrates the block diagram of the first base station according to the embodiment of the present invention.
In all of above-mentioned accompanying drawing, identical label represents have feature or function identical, similar or corresponding.
Detailed description of the invention
Embodiments of the present invention are described in detail below with reference to accompanying drawing.
Fig. 1 schematically shows the environment 100 that the present invention can be implemented within.
As it is shown in figure 1, this environment 100 includes the first base station 110 corresponding to the first community, corresponding to the second base station 120 and the user terminal 130 of the second community.
First base station 110 provides the first coverage 110-a, and the second base station 120 provides the second coverage 120-a.
User terminal 130 can move in environment 100, and can enter or exit the first and second coverage 110-a, 120-a.Therefore, user terminal 130 is communicated by wireless link 140 and the first base station 110.Or, user terminal 130 is communicated by wireless link 150 and the second base station 120.It addition, communicated by back haul link 160 between the first base station 110 and the second base station 120.Back haul link 160 can be wired, it is also possible to is wireless.
Here, it is assumed that the first base station 110 is macro cell base station, the second base station 120 is microcell base station, and its existence adds power system capacity and the data rate of macro cell base station edge customer.Wherein macro cell base station is such as basic wireless cellular network base station in LTE-A, 3G, GSM etc., and microcell base station is such as that pico base station, femto base station, via node or remote radio frequency are first-class.
As it is shown in figure 1, the first coverage 110-a includes the second coverage 120-a completely.Certainly, it will be understood to those skilled in the art that the first coverage 110-a can partly include the second coverage 120-a.Even the first coverage 110-a and the second coverage 120-a does not intersect.
As it was previously stated, the first base station 110 and the second base station 120 can be operated in identical frequency band.
Fig. 2 illustrates when the first base station 110 and the second base station 120 work on the same frequency band, the process that user terminal 130 switches between which.
In the following description, without loss of generality, it is assumed that the first base station 110 is source base station, the second base station 120 is target BS.
Switch to example with the internal evolution UMTS Terrestrial radio access network (E-UTRAN) of Long Term Evolution LTE using X2 interface (namely the back haul link 160 between the first base station 110 and the second base station 120 is for aerial X2 interface), describe the handoff procedure shown in Fig. 2.
When user terminal 130 enters the coverage of the second base station 120, it measures the reference signal (pilot tone) from the second base station 120, and measurement report (intensity of such as reference signal) is sent (step S210) to the first base station 110.Based on measurement report and RRM (RRM) information, first base station 110 judges whether (step S220) switches user terminal 130, and when judged result is affirmative, send (passing through back haul link) handover request (step S230) to the second base station 120.Second base station 120 prepares switching, and sends (passing through back haul link) Handover Request Acknowledge (step S240) to the first base station 110.After receiving this Handover Request Acknowledge, the first base station 110 sends wireless heterogeneous networks (RRC) to user terminal 130 and connects reconfiguration message (step S250).User terminal 130 prepare switching, and send to the second base station 120 RRC connect reconfigure completion message (step S260).When the second base station 120 receives after RRC connects and reconfigure completion message from user terminal 130, the second base station 120 starts to send data (step S270) to user terminal 130.
As mentioned above, in the system supporting dynamic spectrum access DSA, due in order to increase power system capacity, second base station 120 can change over and work in the frequency band being different from the frequency band that the first base station 110 works in, such as, become from LTE-A, 3G or GSM frequency band working in operator and work in public safety frequency spectrum white space or television spectrum white space, even if causing user terminal 130 to be moved in its coverage 120-a, this the second base station 120 can not be switched to from the first base station 110, thus influential system performance.
Here, user terminal 130 supports multi-carrier data transmission.Without loss of generality, user terminal 130 is initialized as work on the first band of frequencies, and is unaware that the situation of the second frequency band.
Fig. 3 illustrate according to an embodiment of the invention when the first base station 110 and the second base station 120 work over different frequency bands, the process that user terminal 130 switches between which.
Here, without loss of generality, it is assumed that the first base station 110 is operated in the first frequency band, namely sending data on the first frequency band data channel, the second base station 120 is operated in the second frequency band, namely sends data on the second frequency band data channel.
Additionally, as will be described below, although the second base station sends data over a second frequency band, second base station can also send reference signal on the first band of frequencies and control transmission information on channel at the first frequency band, but, second base station does not send data on the first frequency band data channel, such that it is able to reduce and the presence of intercell interference of the first base station sending data on the first frequency band data channel.
First, in step S310, the second base station 120 sends reference signal (pilot signal) on the first band of frequencies, so that initialization can appreciate that the existence of this second base station 120 at the user terminal 130 of the first frequency band.
User terminal 130 measures the reference signal (pilot signal) sent on the first band of frequencies from the second base station 120, and on the first band of frequencies measurement report (such as about the intensity of reference signal) is sent (step S320) to the first base station 110.
Based on measurement report and RRM (RRM) information, first base station 110 judges whether (step S330) switches user terminal 130.When judged result is affirmative, the first base station 110 sends handover request (step S340) by back haul link to the second base station 120.
Second base station 120 prepares switching, and sends Handover Request Acknowledge (step S350) by described back haul link to the first base station 110.
Meanwhile, the second base station 120 controls channel by the first frequency band, sends the information (step S360) being switched to required for described second base station to user terminal 130.Information required for being wherein switched to described second base station at least includes carrier wave and the bandwidth of the second frequency band.Information required for being switched to described second base station could be included for order user terminal 130 to be needed to be switched on the second frequency band, the information communicated with the second base station over a second frequency band.
After receiving this Handover Request Acknowledge, the first base station 110 sends wireless heterogeneous networks (RRC) to user terminal 130 on the first band of frequencies and connects reconfiguration message (step S370).
It should be noted that, second base station 120 should control to send the opportunity of the information required for described second base station of being switched to user terminal 130 so that user terminal 130 receives the time of the information required for this is switched to described second base station and is not as big with the difference received between the time that above-mentioned wireless heterogeneous networks (RRC) is connected reconfiguration message.
User terminal 130 receives after wireless heterogeneous networks (RRC) connects reconfiguration message and receive, from the second base station 120, the information being switched to required for described second base station from the first base station 110, prepare switching, and over a second frequency band (or on control channel of the first frequency band) send to the second base station 120 RRC connect reconfigure completion message (step S380).
When the second base station 120 receives after RRC connects and reconfigure completion message from user terminal 130, the second base station 120 begins to send data (step S390) to user terminal 130 over a second frequency band.
Fig. 4 illustrate according to another implementation of the invention when the first base station 110 and the second base station 120 work over different frequency bands, the process that user terminal 130 switches between which.
First, in step S410, the second base station 120 sends reference signal (pilot signal) on the first band of frequencies, so that initialization can appreciate that the existence of this second base station 120 at the user terminal 130 of the first frequency band.
User terminal 130 measures the reference signal (pilot signal) sent on the first band of frequencies from the second base station 120, and on the first band of frequencies measurement report (such as about the intensity of reference signal) is sent (step S420) to the first base station 110.
Based on measurement report and RRM (RRM) information, first base station 110 judges whether (step S430) switches user terminal 130.When judged result is affirmative, the first base station 110 sends handover request (step S440) by back haul link to the second base station 120.
Second base station 120 prepares switching, and sends Handover Request Acknowledge (step S450) by described back haul link to the first base station 110.
It addition, the second base station 120 is by described back haul link, send the information (step S460) being switched to required for described second base station to the first base station 110.Information required for being wherein switched to described second base station at least includes carrier wave and the bandwidth of the second frequency band.Information required for being switched to described second base station could be included for order user terminal 130 to be needed to be switched on the second frequency band, the information communicated with the second base station 120 over a second frequency band.
After receiving this Handover Request Acknowledge, the first base station 110 sends wireless heterogeneous networks (RRC) to user terminal 130 on the first band of frequencies and connects reconfiguration message (step S470).
It addition, after receiving the information being switched to required for described second base station, the first base station 110 forwards this to be switched to the information (step S480) required for described second base station to user terminal 130 on the first band of frequencies
It should be noted that, should control to send this opportunity being switched to the information required for described second base station to user terminal 130 so that user terminal 130 receives the time of the information required for this is switched to described second base station and is not as big with the difference received between the time that above-mentioned wireless heterogeneous networks (RRC) is connected reconfiguration message.
User terminal 130 receives wireless heterogeneous networks (RRC) and connects reconfiguration message and after being switched to the information required for described second base station from the first base station 110, prepare switching, and over a second frequency band (or on control channel of the first frequency band) send to the second base station 120 RRC connect reconfigure completion message (step S490).
When the second base station 120 receives after RRC connects and reconfigure completion message from user terminal 130, the second base station 120 begins to send data (step S495) to user terminal 130 over a second frequency band.
Fig. 5 illustrate according to another implementation of the invention when the first base station 110 and the second base station 120 work over different frequency bands, the process that user terminal 130 switches between which.
First, in step S510, the second base station 120 sends reference signal (pilot signal) on the first band of frequencies, so that initialization can appreciate that the existence of this second base station 120 at the user terminal 130 of the first frequency band.
User terminal 130 measures the reference signal (pilot signal) sent on the first band of frequencies from the second base station 120, and on the first band of frequencies measurement report (such as about the intensity of reference signal) is sent (step S520) to the first base station 110.
Based on measurement report and RRM (RRM) information, first base station 110 judges whether (step S530) switches user terminal 130.When judged result is affirmative, the first base station 110 sends handover request (step S540) by back haul link to the second base station 120.
Second base station 120 prepares switching, and sends Handover Request Acknowledge (step S550) by described back haul link to the first base station 110.
Wherein, this Handover Request Acknowledge also includes being switched to the information required for described second base station.Information required for being wherein switched to described second base station at least includes carrier wave and the bandwidth of the second frequency band.Need to be switched on the second frequency band it addition, the information required for being switched to described second base station could be included for order user terminal 130, the information communicated with the second base station over a second frequency band.
After receiving this Handover Request Acknowledge, the first base station 110 sends wireless heterogeneous networks (RRC) to user terminal 130 on the first band of frequencies and connects reconfiguration message (step S560).Wherein, this wireless heterogeneous networks (RRC) connects reconfiguration message and also includes being switched to the information required for described second base station.
User terminal 130 from the first base station 110 receive wireless heterogeneous networks (RRC) connect reconfiguration message and including be switched to the information required for described second base station after, prepare switching, and over a second frequency band (or on control channel of the first frequency band) send to the second base station 120 RRC connect reconfigure completion message (step S570).
When the second base station 120 receives after RRC connects and reconfigure completion message from user terminal 130, the second base station 120 begins to send data (step 580) to user terminal 130 over a second frequency band.
It will be understood by those of skill in the art that after user terminal 130 is switched to and works over a second frequency band, it is possible to carry out the process similar above with reference to Fig. 3-5 process described, make user terminal 130 again be switched to and work on the first band of frequencies.More specifically, the first base station 110 sends reference signal (pilot signal) over a second frequency band, so that being switched to the user terminal 130 being operated in the second frequency band to can appreciate that the existence of this first base station 110.And determine need to carry out user terminal 130 from the switching of the 120 to the first base station, the second base station 110 time, described first base station 110 such as by referring to Fig. 3-5 3 kinds of modes described, sends the information being switched to required for described first base station to described user terminal 130.
Certainly, when it will be understood to those skilled in the art that the first frequency band worked in before user terminal 130 can remember it, it is not necessary to carry out the process similar above with reference to Fig. 3-5 process described, just can again be switched to and work on the first band of frequencies.
Fig. 6 illustrates the block diagram of the second base station according to the embodiment of the present invention.
This second base station 120 makes user terminal 130 can switch between work the first base station 110 on the first band of frequencies and work the second base station 120 over a second frequency band.This second base station 120 includes:
Reference signal dispensing device 1201, for sending reference signal on described first frequency band, so that the described user terminal 130 being operated on described first frequency band can appreciate that the existence of described second base station 120, and
Information transmitting apparatus 1202, for determine need to carry out user terminal 130 from described first base station 110 to the switching of described second base station 120 time, send, to described user terminal 130, the information required for described second base station of being switched to.
Information required for being wherein switched to described second base station at least includes carrier frequency and the bandwidth of described second frequency band.Information required for being switched to described second base station could be included for order user terminal 130 to be needed to be switched on the second frequency band, the information communicated with the second base station over a second frequency band.
In an embodiment of the invention, described information transmitting apparatus 1202 directly sends, to described user terminal 130, the information being switched to required for described second base station on the control channel of the first frequency band.
In yet another embodiment of the present invention, described information transmitting apparatus 1202 sends, to described first base station 110, the information being switched to required for described second base station by back haul link, is then forwarded the information being switched to required for described second base station on the first band of frequencies to described user terminal 130 by described first base station 110.
In the further embodiment of the present invention, by the information required for being switched to described second base station is included in switching request acknowledgement message, described information transmitting apparatus 1202 sends, to described first base station 110, the information being switched to required for described second base station by back haul link, and by the information required for being switched to described second base station is included in wireless resource control connection reconfiguration message, by described first base station 110 on the first band of frequencies to described user terminal 130 forward described in be switched to the information required for described second base station.
Second base station 120 can also include:
Receive device 1203, for by back haul link, receiving the information being switched to required for described first base station from the first base station 110.
Retransmission unit 1204, for forwarding the information being switched to required for described first base station over a second frequency band to described user terminal 130.
In an embodiment of the invention, receive device 1203 by back haul link, from the switching request acknowledgement message that the first base station 110 receives, receive the information being switched to required for described first base station；Described retransmission unit 1204, by including in wireless resource control connection reconfiguration message by the information required for being switched to described first base station, forwards the information being switched to required for described first base station over a second frequency band to described user terminal 130.
Fig. 7 illustrates the block diagram of the first base station according to the embodiment of the present invention.
This first base station 110 makes user terminal 130 can switch between work the first base station 110 on the first band of frequencies and work the second base station 120 over a second frequency band.This first base station 110 includes:
Receive device 1103, for by back haul link, receiving the information being switched to required for described second base station from the second base station 120.
Retransmission unit 1104, for forwarding the information being switched to required for described second base station on the first band of frequencies to described user terminal 130.
In an embodiment of the invention, receive device 1103 by back haul link, from the switching request acknowledgement message that the second base station 120 receives, receive the information being switched to required for described second base station；Described retransmission unit 1104, by including in wireless resource control connection reconfiguration message by the information required for being switched to described second base station, forwards the information being switched to required for described second base station on the first band of frequencies to described user terminal 130.
First base station 110 can also include:
Reference signal dispensing device 1101, for sending reference signal on described first frequency band, so that the described user terminal 130 being switched on described second frequency band can appreciate that the existence of described first base station 110, and
Information transmitting apparatus 1102, for determine need to carry out user terminal 130 from described second base station 120 to the switching of described first base station 110 time, send, to described user terminal 130, the information required for described first base station of being switched to.
Information required for being wherein switched to described first base station at least includes carrier frequency and the bandwidth of described first frequency band.Information required for being switched to described first base station could be included for order user terminal 130 to be needed to be switched on the first frequency band, the information communicated with the first base station on the first band of frequencies.
In an embodiment of the invention, described information transmitting apparatus 1102 directly sends, to described user terminal 130, the information being switched to required for described first base station on the control channel of the second frequency band.
In yet another embodiment of the present invention, described information transmitting apparatus 1102 sends, to described second base station 120, the information being switched to required for described first base station by back haul link, is then forwarded the information being switched to required for described first base station over a second frequency band to described user terminal 130 by described second base station 120.
In the further embodiment of the present invention, by the information required for being switched to described first base station is included in switching request acknowledgement message, described information transmitting apparatus 1102 sends, to described second base station 120, the information being switched to required for described first base station by back haul link, and by including in wireless resource control connection reconfiguration message by the information required for being switched to described first base station, described second base station 120 forwards the information being switched to required for described first base station over a second frequency band to described user terminal 130.
It should be noted that, in order to make the present invention be easier to understand, it is some ins and outs more specifically of being likely necessary of known and for the present invention realization for a person skilled in the art that above description eliminates.
Therefore; selecting and describing embodiment is to explain principles of the invention and practical application thereof better; and make those of ordinary skill in the art understand, under the premise without departing from essence of the present invention, all modifications and change each fall within protection scope of the present invention defined by the claims.
It addition, it will be understood to those skilled in the art that the step of various method described above can be realized by the computer programmed.Here, some embodiment is intended to overlay program storage device, and it is machine or computer-readable, and coding has machine to perform or computer executable instructions program, and wherein said instruction performs the some or all of steps of said method.This program storage device can be such as magnetic recording medium such as Disk and tape, hard disk drive or optical readable digital data storage medium.Embodiment is also intended to cover the computer of the described step being programmed to carry out said method.
Claims (15)
1. the method for making user terminal can switch between work the first base station on the first band of frequencies and work the second base station over a second frequency band, including step:
Described second base station sends reference signal on described first frequency band, so that the described user terminal being operated on described first frequency band can appreciate that the existence of described second base station；
Reference signal described in described user terminal measurement, and on described first frequency band, measurement report is sent to described first base station；And
Determine when needing to carry out user terminal from described first base station to the switching of described second base station in described first base station, described second base station sends the information being switched to required for described second base station to described user terminal.
2. method according to claim 1, the information required for being wherein switched to described second base station at least includes carrier frequency and the bandwidth of described second frequency band.
3. method according to claim 1, the information wherein sent required for being switched to described second base station to described user terminal includes:
Described second base station directly sends, to described user terminal, the information being switched to required for described second base station on the control channel of the first frequency band.
4. method according to claim 1, the information wherein sent required for being switched to described second base station to described user terminal includes:
Described second base station sends, to described first base station, the information being switched to required for described second base station by back haul link, is then forwarded the information being switched to required for described second base station on the first band of frequencies to described user terminal by described first base station.
5. method according to claim 4, wherein by the information required for being switched to described second base station is included in switching request acknowledgement message, described second base station sends, to described first base station, the information being switched to required for described second base station by back haul link, and by including in wireless resource control connection reconfiguration message by the information required for being switched to described second base station, described first base station forwards the information being switched to required for described second base station on the first band of frequencies to described user terminal.
6. method according to claim 1, wherein said second base station is microcell base station, and described first base station is macro cell base station.
7. method according to claim 1, further comprises the steps of:
Described first base station sends reference signal on described second frequency band, so that the described user terminal being switched on described second frequency band can appreciate that the existence of described first base station, and
Determine need to carry out user terminal from described second base station to the switching of described first base station time, described first base station sends, to described user terminal, the information required for described first base station of being switched to.
8. second base station, for making user terminal can switch between work the first base station on the first band of frequencies and work the second base station over a second frequency band, including:
Reference signal dispensing device, for sending reference signal on described first frequency band, so that the described user terminal being operated on described first frequency band can appreciate that the existence of described second base station, and
Information transmitting apparatus, for determine need to carry out user terminal from described first base station to the switching of described second base station time, send, to described user terminal, the information required for described second base station of being switched to；
Reference signal described in wherein said user terminal measurement, and on described first frequency band, measurement report is sent to described first base station, described first base station is determined to be needed to carry out user terminal from described first base station to the switching of described second base station.
9. the second base station according to claim 8, the information required for being wherein switched to described second base station at least includes carrier frequency and the bandwidth of described second frequency band.
10. the second base station according to claim 8, wherein said information transmitting apparatus directly sends, to described user terminal, the information being switched to required for described second base station on the control channel of the first frequency band.
11. the second base station according to claim 8, wherein said information transmitting apparatus sends, to described first base station, the information being switched to required for described second base station by back haul link, is then forwarded the information being switched to required for described second base station on the first band of frequencies to described user terminal by described first base station.
12. the second base station according to claim 11, wherein by the information required for being switched to described second base station is included in switching request acknowledgement message, described information transmitting apparatus sends, to described first base station, the information being switched to required for described second base station by back haul link, and by including in wireless resource control connection reconfiguration message by the information required for being switched to described second base station, described first base station forward the information being switched to required for described second base station on the first band of frequencies to described user terminal.
13. the second base station according to claim 8, wherein said second base station is microcell base station, and described first base station is macro cell base station.
14. for the method making user terminal can switch between work the first base station on the first band of frequencies and work the second base station over a second frequency band, including step:
By back haul link, receive the information being switched to required for described second base station from the second base station；
The information being switched to required for described second base station is forwarded on the first band of frequencies to described user terminal；
The reference signal that second base station described in wherein said user terminal measurement sends on described first frequency band, and measurement report is sent to described first base station on described first frequency band, and described first base station is determined to be needed to carry out user terminal from described first base station to the switching of described second base station.
15. first base station, for making user terminal can switch between work the first base station on the first band of frequencies and work the second base station over a second frequency band, including:
Receive device, for by back haul link, receiving the information being switched to required for described second base station from the second base station；
Retransmission unit, for forwarding the information being switched to required for described second base station on the first band of frequencies to described user terminal；
The reference signal that second base station described in wherein said user terminal measurement sends on described first frequency band, and measurement report is sent to described first base station on described first frequency band, and described first base station is determined to be needed to carry out user terminal from described first base station to the switching of described second base station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110065172.3A CN102685828B (en) | 2011-03-17 | 2011-03-17 | Changing method and corresponding base station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110065172.3A CN102685828B (en) | 2011-03-17 | 2011-03-17 | Changing method and corresponding base station |
Publications (2)
| Publication Number | Publication Date |
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| CN102685828A CN102685828A (en) | 2012-09-19 |
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| CN106031198A (en) * | 2014-12-31 | 2016-10-12 | 华为技术有限公司 | Method, device and system for scheduling network node data |
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| CN104244330B (en) * | 2014-10-10 | 2017-08-25 | 福建三元达科技有限公司 | A kind of method of balance EPC gateway loads |
| CN106304217A (en) * | 2015-05-13 | 2017-01-04 | 中兴通讯股份有限公司 | Changing method in a kind of heterogeneous network and device |
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