CN106332283B - A kind of method, apparatus and equipment of the transmission of LAA system uplink - Google Patents
A kind of method, apparatus and equipment of the transmission of LAA system uplink Download PDFInfo
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- CN106332283B CN106332283B CN201510349798.5A CN201510349798A CN106332283B CN 106332283 B CN106332283 B CN 106332283B CN 201510349798 A CN201510349798 A CN 201510349798A CN 106332283 B CN106332283 B CN 106332283B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
- H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
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Abstract
The invention discloses a kind of methods of LAA system uplink transmission, this method comprises: base station is identical back off time to be arranged with the scheduled UE of group, and different back off times is arranged for different groups of scheduled UE；Wherein, described with organizing scheduled UE are as follows: the same scheduling instance by all UE of the same LAA unauthorized cell serves or are as follows: by all UE of LAA unauthorized cell serves in the same subframe.The present invention further simultaneously discloses the device and equipment for realizing the method.
Description
Technical field
The present invention relates to the authorization auxiliary accesses (LAA, Licensed-Assisted Access) in mobile communication field
Technology more particularly to the method, apparatus and equipment of a kind of transmission of LAA system uplink.
Background technique
With the development of LTE, demand of the people to broadband wireless data is more and more obvious.It is growing in order to meet people
Demand, LAA scheme comes into being.The theory of LAA is, is based on LTE network platform, the frequency range of unauthorized is aggregated to LTE
Middle use.LAA scheme is mainly used in small station scene, i.e., using LTE relevant frequency spectrum as main carrier, unlicensed spectrum is as auxiliary load
Wave, main and auxiliary carrier wave provide service jointly in such a way that carrier wave polymerize for user.
Different from wlan system, LAA system unauthorized frequency range ascending resource may distribute to multiple UE simultaneously.If simple
Continue to use random-backoff time (Backoff) method in extension CCA, it is impossible to realize in same subframe to the tune of multiple UE
Degree.When such conflict occurs, channel resource utilization rate will be greatly reduced.
Summary of the invention
To solve existing technical problem, the embodiment of the present invention provides a kind of method of LAA system uplink transmission, dress
It sets and equipment.
The embodiment of the invention provides a kind of methods of LAA system uplink transmission, this method comprises:
Base station is identical back off time to be arranged with the scheduled UE of group, and different keep out of the way is arranged for different groups of scheduled UE
Time；
Wherein, described with the scheduled UE of group are as follows: in the same scheduling instance by the institute of the same LAA unauthorized cell serves
Have UE or are as follows: by all UE of LAA unauthorized cell serves in the same subframe.
In the embodiment of the present invention, back off time is arranged in the base station, comprising:
The base station and the UE generate identical back off time in the corresponding time slot of same subframe；Alternatively, the base
It stands and the back off time of generation is handed down to by the UE by physical downlink control channel PDCCH.
In the embodiment of the present invention, back off time is arranged in the base station, comprising:
The base station is based on system parameter and generates synchronous random sequence, and moves back according to described in the synchronous random sequence calculating
Keep away the time；Wherein,
The system parameter, comprising: System Frame Number and cell ID；Alternatively, System Frame Number, subframe numbers and cell ID；Alternatively,
System Frame Number, timeslot number and cell ID.
In one embodiment, this method further include:
The maximum listening period of setting is sent to the UE by the base station；The maximum listening period is described for informing
The maximum time of UE channel-monitoring；The maximum listening period are as follows: LBT duration, back off time and channel occupancy duration three
The sum of.
In one embodiment, this method further include:
The base station determines that one group is scheduled UE when on the sub-frame of uplink of distribution without completing transmitting uplink data, again
Distribute sub-frame of uplink for the group UE that is scheduled, and since newly assigned sub-frame of uplink, update and move back together with the scheduled UE of the group
Keep away the time；Alternatively,
The base station determines that one group is scheduled UE when on the sub-frame of uplink of distribution without completing transmitting uplink data, same to be somebody's turn to do
The scheduled UE of group simultaneously puts off this scheduling to be executed on next sub-frame of uplink, and since next sub-frame of uplink, with
The scheduled UE of the group updates back off time together；Alternatively,
The base station determines that one group of scheduled UE when on the sub-frame of uplink of distribution without completing transmitting uplink data, determines
This time uplink scheduling failure, terminates the scheduling process.
The embodiment of the invention also provides a kind of methods of LAA system uplink transmission, this method comprises:
UE carries out channel-monitoring；
Determine LBT channel-monitoring result be it is busy, then execute keep out of the way；
Determine that channel status is the spare time after back off time arrival, then starts to send upstream data；
Belong to the scheduled UE back off time having the same with group with the UE, belongs to different groups from the UE and adjusted
Spending UE has different back off times；
It is described with organizing scheduled UE are as follows: the same scheduling instance by all UE of the same LAA unauthorized cell serves,
Or are as follows: by all UE of LAA unauthorized cell serves in the same subframe.
In one embodiment, this method further include:
The UE and base station generate identical back off time in the corresponding time slot of same subframe；Alternatively,
The UE receives the back off time that the base station that the base station is issued by PDCCH, described generates.
In the embodiment of the present invention, the UE generates the back off time, comprising:
The UE is based on system parameter and generates synchronous random sequence, and keeps out of the way according to described in the synchronous random sequence calculating
Time；Wherein,
The system parameter, comprising: System Frame Number and cell ID；Alternatively, System Frame Number, subframe numbers and cell ID；Alternatively,
System Frame Number, timeslot number and cell ID.
In the embodiment of the present invention, the UE carries out channel-monitoring, comprising:
The UE starts to carry out channel-monitoring when the sub-frame of uplink of distribution arrives；Alternatively,
The UE the previous subframe of the sub-frame of uplink of distribution ending for a period of time, start carry out channel-monitoring.
In one embodiment, this method further include:
The UE receives the maximum listening period of base station setting；The maximum listening period is for informing the UE channel prison
The maximum time listened；The maximum listening period are as follows: the sum of LBT duration, back off time and channel occupancy duration three.
In one embodiment, this method further include:
The UE after no completion transmitting uplink data, is redistributed on the sub-frame of uplink that base station is distributed in the base station
Sub-frame of uplink transmitting data, and update back off time together with the base station since the newly assigned sub-frame of uplink；
Alternatively,
After the UE does not complete transmitting uplink data on the sub-frame of uplink that base station is distributed, with the base station simultaneously by this
Secondary scheduling is put off to be executed on next sub-frame of uplink, and since next sub-frame of uplink, is updated and moved back together with the base station
Keep away the time；Alternatively,
The UE after no completion transmitting uplink data, determines that this uplink scheduling loses on the sub-frame of uplink that base station is distributed
It loses, terminates the scheduling process.
The embodiment of the invention also provides a kind of devices of LAA system uplink transmission, which includes: setup module, use
In for identical back off time is arranged with organizing scheduled UE, and different back off times is set for different groups of scheduled UE；
Wherein, described with the scheduled UE of group are as follows: in the same scheduling instance by the institute of the same LAA unauthorized cell serves
Have UE or are as follows: by all UE of LAA unauthorized cell serves in the same subframe.
In one embodiment, described device further include: sending module；
The setup module is also used to be arranged maximum listening period, and the maximum listening period is transmitted to the hair
Send module；
The sending module, for the maximum listening period to be transferred to UE；
Wherein, the maximum listening period is used to inform the maximum time of the UE channel-monitoring；When the maximum monitoring
Between are as follows: the sum of LBT duration, back off time and channel occupancy duration three.
In one embodiment, described device further include: determination processing module；
The determination processing module, for determining one group of scheduled UE on the sub-frame of uplink of distribution without completing upper line number
When according to transmission, sub-frame of uplink is distributed for the scheduled UE of the group again；Correspondingly,
The setup module is also used to since the newly assigned sub-frame of uplink, being scheduled together with UE with the group updates
Back off time；Alternatively,
The determination processing module, for determining one group of scheduled UE on the sub-frame of uplink of distribution without completing upper line number
When according to transmission, this scheduling is put off simultaneously with the scheduled UE of the group and is executed on next sub-frame of uplink；Correspondingly,
The setup module is also used to since next sub-frame of uplink, when update is kept out of the way together with the scheduled UE of the group
Between；Alternatively,
The determination processing module, for determining one group of scheduled UE on the sub-frame of uplink of distribution without completing upper line number
When according to transmission, determines that this uplink scheduling fails, terminate the scheduling process.
The embodiment of the invention also provides a kind of base station, which includes: devices described above.
The embodiment of the invention also provides a kind of device of LAA system uplink transmission, which includes: to monitor module and biography
Defeated module；Wherein,
The monitoring module carries out channel-monitoring for UE；
The transmission module, for determine LBT channel-monitoring result be it is busy, then execute keep out of the way；Determination is arrived in back off time
It is the spare time up to rear channel status, then starts to send upstream data；
Belong to the scheduled UE back off time having the same with group with the UE, belongs to different groups from the UE and adjusted
Spending UE has different back off times；
It is described with organizing scheduled UE are as follows: the same scheduling instance by all UE of the same LAA unauthorized cell serves,
Or are as follows: by all UE of LAA unauthorized cell serves in the same subframe.
In one embodiment, the device further include: generation module；
The generation module is used to generate identical back off time in the corresponding time slot of same subframe with base station；Alternatively,
The back off time generated for receiving the base station that the base station is issued by PDCCH, described.
In one embodiment, the transmission module is also used to receive the maximum listening period of base station setting；
The maximum listening period is used to inform the maximum time of the UE channel-monitoring；The maximum listening period are as follows:
The sum of LBT duration, back off time and channel occupancy duration three.
In one embodiment,
The transmission module is also used to UE on the sub-frame of uplink that base station is distributed after no completion transmitting uplink data,
The sub-frame of uplink transmitting data that the base station is redistributed；Correspondingly,
The generation module is also used to since the newly assigned sub-frame of uplink to update together with the base station when keeping out of the way
Between；Alternatively,
The transmission module is also used to UE on the sub-frame of uplink that base station is distributed after no completion transmitting uplink data, with
This scheduling is simultaneously put off in the base station to be executed on next sub-frame of uplink；Correspondingly,
The generation module is also used to update back off time together with the base station since next sub-frame of uplink；Or
Person,
The transmission module is also used to UE and after no completion transmitting uplink data, sentences on the sub-frame of uplink that base station is distributed
Fixed this uplink scheduling failure, terminates the scheduling process.
The embodiment of the invention also provides a kind of UE, which includes: devices described above.
The method, apparatus and equipment of LAA system uplink transmission provided in an embodiment of the present invention, base station are with the scheduled UE of group
Identical back off time is set, and different back off times is set for different groups of scheduled UE；Wherein, described with the scheduled UE of group
Are as follows: the same scheduling instance by all UE of the same LAA unauthorized cell serves or are as follows: by LAA in the same subframe
All UE of unauthorized cell serves.As it can be seen that compared with prior art, the embodiment of the present invention can guarantee Wi-Fi and LAA system it
Between resource contention fairness, the collision probability in LAA system uplink transmission process between UE is effectively reduced, it is ensured that channel resource
Utilization rate.
Detailed description of the invention
In attached drawing (it is not necessarily drawn to scale), similar appended drawing reference can describe phase in different views
As component.Similar reference numerals with different letter suffix can indicate the different examples of similar component.Attached drawing with example and
Unrestricted mode generally shows each embodiment discussed herein.
Fig. 1 is the method implementation flow chart of the transmission of LAA system uplink described in one embodiment of the invention；
Fig. 2 is the method implementation flow chart of the transmission of LAA system uplink described in another embodiment of the present invention；
Fig. 3 is the method implementation flow chart of the transmission of LAA system uplink described in another embodiment of the present invention；
Fig. 4 is the apparatus structure schematic diagram of the transmission of LAA system uplink described in one embodiment of the invention；
Fig. 5 is the apparatus structure schematic diagram of the transmission of LAA system uplink described in another embodiment of the present invention；
Fig. 6 is the apparatus structure schematic diagram of the transmission of LAA system uplink described in another embodiment of the present invention；
Fig. 7 is the apparatus structure schematic diagram of the transmission of LAA system uplink described in another embodiment of the present invention；
Fig. 8 is the interference schematic diagram in LAA system communication processes described in scene one of the present invention；
Fig. 9 is subframe structure schematic diagram described in scene one of the present invention；
Figure 10 is that channel-monitoring described in scene two of the present invention and backoff procedure occur in the corresponding son in subframe beginning
Frame structure schematic diagram；
Figure 11 is that channel-monitoring described in scene two of the present invention and backoff procedure occur to want latter end corresponding in subframe
Subframe structure schematic diagram；
Figure 12 is that channel-monitoring described in scene three of the present invention and backoff procedure occur in the corresponding son in subframe beginning
Frame structure schematic diagram；
Figure 13 is that channel-monitoring described in scene four of the present invention and backoff procedure occur to want latter end corresponding in subframe
Subframe structure schematic diagram.
Specific embodiment
In the embodiment of the present invention, base station is identical back off time to be arranged with the scheduled UE of group, and adjusted for different groups
Different back off times is arranged in degree UE；Wherein, described with organizing scheduled UE are as follows: the same scheduling instance by the same LAA not
Authorize cell serves all UE or are as follows: by all UE of LAA unauthorized cell serves in the same subframe.
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
The embodiment of the invention provides a kind of methods of LAA system uplink transmission, this method comprises:
Base station is identical back off time to be arranged with the scheduled UE of group, and different keep out of the way is arranged for different groups of scheduled UE
Time；
Wherein, described with the scheduled UE of group are as follows: in the same scheduling instance by the institute of the same LAA unauthorized cell serves
Have UE or are as follows: by all UE of LAA unauthorized cell serves in the same subframe.
In the embodiment of the present invention, back off time is arranged in the base station, comprising:
The base station and the UE generate identical back off time in the corresponding time slot of same subframe, it may be assumed that the base station
The back off time (specific algorithm is shown in subsequent descriptions) is generated using identical algorithm with the UE；Alternatively, the base station passes through
The back off time of generation is handed down to the UE by physical downlink control channel PDCCH (UL Grant).
In the embodiment of the present invention, back off time is arranged in the base station, comprising:
The base station is based on system parameter and generates synchronous random sequence, and moves back according to described in the synchronous random sequence calculating
Keep away the time；Wherein,
The system parameter, comprising: System Frame Number and cell ID；Alternatively, System Frame Number, subframe numbers and cell ID；Alternatively,
System Frame Number, timeslot number and cell ID.
The embodiment of the invention also provides a kind of methods of LAA system uplink transmission, as shown in Figure 1, this method comprises:
Step 101: base station is identical back off time to be arranged with the scheduled UE of group, and be arranged not for different groups of scheduled UE
Same back off time；Wherein, described with the scheduled UE of group are as follows: to be taken in the same scheduling instance by the same LAA unauthorized cell
Business all UE or are as follows: by all UE of LAA unauthorized cell serves in the same subframe.
Step 102: the maximum listening period of setting is sent to the UE by the base station；The maximum listening period is used for
Inform the maximum time of the UE channel-monitoring；The maximum listening period are as follows: LBT duration, back off time and channel occupancy
The sum of duration three.
Here, the step 101 tandem requirement not stringent with step 102.
In the embodiment of the present invention, back off time is arranged in the base station, comprising:
The base station and the UE generate identical back off time in the corresponding time slot of same subframe；Alternatively, the base
It stands and the back off time of generation is handed down to by the UE by physical downlink control channel PDCCH (UL Grant).
In the embodiment of the present invention, back off time is arranged in the base station, comprising:
The base station is based on system parameter and generates synchronous random sequence, and moves back according to described in the synchronous random sequence calculating
Keep away the time；Wherein,
The system parameter, comprising: System Frame Number and cell ID；Alternatively, System Frame Number, subframe numbers and cell ID；Alternatively,
System Frame Number, timeslot number and cell ID.
In one embodiment, this method further include:
The base station determines that one group is scheduled UE when on the sub-frame of uplink of distribution without completing transmitting uplink data, again
Distribute sub-frame of uplink for the group UE that is scheduled, and since newly assigned sub-frame of uplink, update and move back together with the scheduled UE of the group
Keep away the time；Alternatively,
The base station determines that one group is scheduled UE when on the sub-frame of uplink of distribution without completing transmitting uplink data, same to be somebody's turn to do
The scheduled UE of group simultaneously puts off this scheduling to be executed on next sub-frame of uplink, and since next sub-frame of uplink, with
The scheduled UE of the group updates back off time together；Alternatively,
The base station determines that one group of scheduled UE when on the sub-frame of uplink of distribution without completing transmitting uplink data, determines
This time uplink scheduling failure, terminates the scheduling process.
Here, the update back off time is are as follows: the calculation method according to above-mentioned back off time is joined based on the system of variation
Number recalculates back off time.
As it can be seen that compared with prior art, the embodiment of the present invention can guarantee the public affairs of resource contention between Wi-Fi and LAA system
The collision probability in LAA system uplink transmission process between UE is effectively reduced, it is ensured that the utilization rate of channel resource in levelling.
The embodiment of the invention also provides a kind of methods of LAA system uplink transmission, as shown in Fig. 2, this method comprises:
Step 201:UE carries out channel-monitoring；
Step 202: determine LBT channel-monitoring result be it is busy, then execute keep out of the way；
Step 203: determining that channel status is the spare time after back off time arrival, then starts to send upstream data；
Belong to the scheduled UE back off time having the same with group with the UE, belongs to different groups from the UE and adjusted
Spending UE has different back off times；
It is described with organizing scheduled UE are as follows: the same scheduling instance by all UE of the same LAA unauthorized cell serves,
Or are as follows: by all UE of LAA unauthorized cell serves in the same subframe.
Here, if UE determines that LBT channel-monitoring result for the spare time, directly transmits upstream data.
In one embodiment, as shown in figure 3, this method further include:
Step 200: the UE and base station generate identical back off time in the corresponding time slot of same subframe；Alternatively,
The UE receives the back off time that the base station that the base station is issued by PDCCH (UL Grant), described generates.
In the embodiment of the present invention, the UE generates the back off time, comprising:
The UE is based on system parameter and generates synchronous random sequence, and keeps out of the way according to described in the synchronous random sequence calculating
Time；Wherein,
The system parameter, comprising: System Frame Number and cell ID；Alternatively, System Frame Number, subframe numbers and cell ID；Alternatively,
System Frame Number, timeslot number and cell ID.
In the embodiment of the present invention, the UE carries out channel-monitoring, comprising:
The UE starts to carry out channel-monitoring when the sub-frame of uplink of distribution arrives；Alternatively,
The UE the previous subframe of the sub-frame of uplink of distribution ending for a period of time, start carry out channel-monitoring.
Here, it may also be downlink subframe (non-distribution) that the previous subframe, which may be sub-frame of uplink,.
In one embodiment, this method further include:
The UE receives the maximum listening period of base station setting；The maximum listening period is for informing the UE channel prison
The maximum time listened；The maximum listening period are as follows: the sum of LBT duration, back off time and channel occupancy duration three.
In one embodiment, this method further include:
The UE after no completion transmitting uplink data, is redistributed on the sub-frame of uplink that base station is distributed in the base station
Sub-frame of uplink transmitting data, and update back off time together with the base station since the newly assigned sub-frame of uplink；
Alternatively,
After the UE does not complete transmitting uplink data on the sub-frame of uplink that base station is distributed, with the base station simultaneously by this
Secondary scheduling is put off to be executed on next sub-frame of uplink, and since next sub-frame of uplink, is updated and moved back together with the base station
Keep away the time；Alternatively,
The UE after no completion transmitting uplink data, determines that this uplink scheduling loses on the sub-frame of uplink that base station is distributed
It loses, terminates the scheduling process.
As it can be seen that compared with prior art, the embodiment of the present invention can guarantee the public affairs of resource contention between Wi-Fi and LAA system
The collision probability in LAA system uplink transmission process between UE is effectively reduced, it is ensured that the utilization rate of channel resource in levelling.
It should be noted that the channel-monitoring and backoff procedure in the embodiment of the present invention are likely to occur in subframe and start portion
Point, it is also possible to occur subframe will latter end, such as:
1) for channel-monitoring and backoff procedure, there is a situation where in subframe beginning:
When uplink scheduling subframe arrives, scheduled UE starts to pass with the data on adjacent LAA unlicensed cell
Competitive channel resource starts to send uplink if channel status is the spare time after back off time together for defeated, Wi-Fi data transmission
Data.The upstream data includes two parts: occupied information (such as preamble code) and the UE truthful data to be sent.
2) for channel-monitoring and backoff procedure, there is a situation where will latter end in subframe:
Carrier sense, backoff procedure are executed since the final stage time of the previous subframe of uplink scheduling subframe, if
Channel status is the spare time after back off time, then starts to send upstream data.
The embodiment of the invention also provides a kind of devices of LAA system uplink transmission, which includes: setup module 401,
For organizing the identical back off time of scheduled UE setting to be same, and different back off times is set for the different groups of UE that are scheduled；
Wherein, described with the scheduled UE of group are as follows: in the same scheduling instance by the institute of the same LAA unauthorized cell serves
Have UE or are as follows: by all UE of LAA unauthorized cell serves in the same subframe.
In the embodiment of the present invention, back off time is arranged in the setup module 401, comprising:
The setup module 401 and the UE generate identical back off time in the corresponding time slot of same subframe；Alternatively,
The back off time of generation is handed down to the UE by physical downlink control channel PDCCH (UL Grant).
In the embodiment of the present invention, back off time is arranged in the setup module 401, comprising:
Synchronous random sequence is generated based on system parameter, and calculates the back off time according to the synchronous random sequence；
Wherein,
The system parameter, comprising: System Frame Number and cell ID；Alternatively, System Frame Number, subframe numbers and cell ID；Alternatively,
System Frame Number, timeslot number and cell ID.
In one embodiment, as shown in figure 4, described device further include: sending module 402；
The setup module 401, is also used to be arranged maximum listening period, and the maximum listening period is transmitted to described
Sending module；
The sending module 402, for the maximum listening period to be transferred to UE；
Wherein, the maximum listening period is used to inform the maximum time of the UE channel-monitoring；When the maximum monitoring
Between are as follows: the sum of LBT duration, back off time and channel occupancy duration three.
In one embodiment, as shown in figure 5, described device further include: determination processing module 403；
The determination processing module 403, for determining one group of scheduled UE on the sub-frame of uplink of distribution without completing
When row data are transmitted, sub-frame of uplink is distributed for the scheduled UE of the group again；Correspondingly,
The setup module 401 is also used to be scheduled together with UE more since the newly assigned sub-frame of uplink, with the group
New back off time；Alternatively,
The determination processing module 403, for determining one group of scheduled UE on the sub-frame of uplink of distribution without completing
When row data are transmitted, this scheduling is put off simultaneously with the scheduled UE of the group and is executed on next sub-frame of uplink；Correspondingly,
The setup module 401 is also used to since next sub-frame of uplink, is scheduled to update together with UE with the group and be kept out of the way
Time；Alternatively,
The determination processing module 403, for determining one group of scheduled UE on the sub-frame of uplink of distribution without completing
When row data are transmitted, determines that this uplink scheduling fails, terminate the scheduling process.
The embodiment of the invention also provides a kind of devices of LAA system uplink transmission, as shown in fig. 6, the device includes: prison
Listen module 601 and transmission module 602；Wherein,
The monitoring module 601 carries out channel-monitoring for UE；
The transmission module 602, for determine LBT channel-monitoring result be it is busy, then execute keep out of the way；It determines in back off time
Channel status is the spare time after arrival, then starts to send upstream data；
Belong to the scheduled UE back off time having the same with group with the UE, belongs to different groups from the UE and adjusted
Spending UE has different back off times；
It is described with organizing scheduled UE are as follows: the same scheduling instance by all UE of the same LAA unauthorized cell serves,
Or are as follows: by all UE of LAA unauthorized cell serves in the same subframe.
In one embodiment, as shown in fig. 7, the device further include: generation module 603；
The generation module 603 is used to generate identical back off time in the corresponding time slot of same subframe with base station；Or
Person,
The back off time generated for receiving the base station that the base station is issued by PDCCH (UL Grant), described.
Wherein, the generation module 603 generates the back off time, comprising:
Synchronous random sequence is generated based on system parameter, and calculates the back off time according to the synchronous random sequence；
Wherein,
The system parameter, comprising: System Frame Number and cell ID；Alternatively, System Frame Number, subframe numbers and cell ID；Alternatively,
System Frame Number, timeslot number and cell ID.
Wherein, the monitoring module 601 carries out channel-monitoring, comprising:
When the sub-frame of uplink of distribution arrives, start to carry out channel-monitoring；Alternatively,
The sub-frame of uplink of distribution previous subframe ending for a period of time, start carry out channel-monitoring.
In one embodiment, the transmission module is also used to receive the maximum listening period of base station setting；
The maximum listening period is used to inform the maximum time of the UE channel-monitoring；The maximum listening period are as follows:
The sum of LBT duration, back off time and channel occupancy duration three.
In one embodiment,
The transmission module is also used to UE on the sub-frame of uplink that base station is distributed after no completion transmitting uplink data,
The sub-frame of uplink transmitting data that the base station is redistributed；Correspondingly,
The generation module is also used to since the newly assigned sub-frame of uplink to update together with the base station when keeping out of the way
Between；Alternatively,
The transmission module is also used to UE on the sub-frame of uplink that base station is distributed after no completion transmitting uplink data, with
This scheduling is simultaneously put off in the base station to be executed on next sub-frame of uplink；Correspondingly,
The generation module is also used to update back off time together with the base station since next sub-frame of uplink；Or
Person,
The transmission module is also used to UE and after no completion transmitting uplink data, sentences on the sub-frame of uplink that base station is distributed
Fixed this uplink scheduling failure, terminates the scheduling process.
The embodiment of the invention also provides a kind of base station, which includes: device described in Fig. 4 or Fig. 5.
It include: device described in Fig. 6 or Fig. 7 the embodiment of the invention also provides a kind of UE, the UE.
As it can be seen that compared with prior art, the embodiment of the present invention can guarantee the public affairs of resource contention between Wi-Fi and LAA system
The collision probability in LAA system uplink transmission process between UE is effectively reduced, it is ensured that the utilization rate of channel resource in levelling.
Below with reference to concrete application scene, the present invention will be described in detail.
Scene one
This application scene realizes the networking of LAA system same frequency, i.e., different LAA unlicensed by setting back off time
Cell upper uplink communication or downlink communication simultaneously.In this embodiment, in a certain subframe, the UE for being all uplink scheduling is one group of quilt
UE is dispatched, the UE for being all descending scheduling is another group of scheduled UE.
Several disturbed conditions that may be present in LAA system are analyzed first, as shown in figure 8, solid arrow table in figure
Show interference, dotted arrow indicates signal:
Since the position interference source (base station UE, LAA and Wi-Fi AP) is more changeable in LAA system, interfere more multiple
It is miscellaneous: in view of uplink is smaller to the interference of downlink to uplink, downlink, in the present embodiment we mainly for downlink to uplink,
And uplink is to the disturbed condition of downlink.In the present embodiment, it proposes a kind of pass through and back off time is set, to guarantee LAA system
The mechanism that uplink is sent simultaneously in system or downlink is sent.
For certain TDD configuration, certain subframe may be sub-frame of uplink；And for certain TDD configuration, which may
For downlink subframe.Identical back off time is set for sub-frame of uplink all in each subframe, is arranged for all downlink subframes another
Back off time.On current subframe, if the back off time of all sub-frame of uplink is less than the back off time of all downlink subframes,
Sub-frame of uplink rob account for the sub-frame resources probability it is larger；If the back off time of all downlink subframes is less than all sub-frame of uplink
Back off time, then downlink subframe rob account for the sub-frame resources probability it is larger, as shown in Figure 9.
If channel status is the spare time after back off time, all UE or all are adjacent, and the base station LAA sends data together, that is, exists
There was only transmitting uplink data or downlink data transmission in a certain subframe, thus avoids the interference between uplink and downlink.
This application scene is suitable for the case where LAA dense deployment.
Scene two
This application scene realizes only one LAA unlicensed cell in a certain subframe by setting back off time
It is upper to there is communication.I.e. there is no adjacent area interference in LAA system.In this embodiment, it is " with scheduled UE is organized " in a certain subframe
The UE dispatched in the subframe by the same base station LAA.
In view of channel-monitoring and backoff procedure are likely to occur in subframe beginning, it is also possible to which generation will be tied in subframe
Beam part provides different implementations with regard to both of these case separately below.
One, there is a situation where in subframe beginning for channel-monitoring and backoff procedure:
As shown in Figure 10, UE 1 and UE 2 belongs to LAA unlicensed cell 1, and UE 3 and UE 4 belong to LAA
unlicensed cell 2。
On UL subframe #1, UE 1 and UE 2 are by uplink scheduling, while UE 3 and UE 4 are also by uplink scheduling.Due to UE 1
It is short compared with UE 3 and UE 4 with the back off time of UE 2, therefore first occupy channel resource.It is initiated as soon after back off time
The transmission of upstream data.
Two, there is a situation where will latter end in subframe for channel-monitoring and backoff procedure:
As shown in figure 11, using the final stage time of each subframe, such as: from the 4th OFDM symbol reciprocal
(OFDM) start, do channel-monitoring and backoff procedure.
Here, UE 1 and UE 2 belongs to unlicensed cell 1, UE 3 and UE 4 and belongs to unlicensed cell 2.
On UL subframe #1, UE 1 and UE 2 are by uplink scheduling, while UE 3 and UE 4 are also by uplink scheduling.Due to UE 1
It is short compared with UE 3 and UE 4 with the random-backoff time of UE 2, therefore first occupy channel resource, i.e. UE 1 and UE 2 are when keeping out of the way
Between the transmission of upstream data is immediately begun to after 1.
Scene three
This application scene setting maximum listening period, to inform the initial time of UE uplink real data transport.Maximum prison
Listening timing definition is the sum of LBT duration, back off time, channel occupancy (such as preamble code occupies) duration.
When maximum listening period time-out, just stops sending occupied information, start simultaneously at and send true data.
The maximum listening period can be obtained by following 3 kinds of modes:
1) default value that LAA system defines: can be a fixed value, at the end of N number of OFDM symbol；It can also define
At the end of previous OFDM symbol.
2) it is arranged by the base station LAA；
3) it is generated simultaneously in the base station LAA and the scheduled end UE, such as: being generated based on synchronous random sequence；
Two examples are given below:
One, at the end of maximum listening period is defined as previous OFDM symbol, and channel-monitoring and preemption processes occur in son
The case where frame beginning:
Two, maximum listening period is LAA system default value, such as 4 OFDM symbols.Channel-monitoring and preemption processes occur
Subframe will latter end the case where:
As shown in figure 13, UE 1 and UE 2 belongs to LAA unlicensed cell 1, and UE 3 and UE 4 belong to LAA
unlicensed cell 2。
On UL subframe #1, UE 1 and UE 2 are by uplink scheduling, while UE 3 and UE 4 are also by uplink scheduling.Due to UE 1
It is short compared with UE 3 and UE 4 with the back off time of UE 2, therefore first occupy channel resource.It is initiated as soon after back off time
The transmission of upstream data.
Scene four
In this application scene, if UE is no on the sub-frame of uplink of distribution to complete transmitting uplink data, there are following three kinds
It can selection operation:
One, the base station LAA need to distribute sub-frame of uplink again for the scheduled UE of the group, start in new sub-frame of uplink, the end UE
It is both needed to update back off time with LAA base station end；Alternatively,
Two, the base station LAA and the scheduled UE of the group simultaneously put off this scheduling executes on next sub-frame of uplink, nothing
UL Grant is needed to indicate.Start in next sub-frame of uplink, the end UE and LAA base station end are both needed to update back off time；Alternatively,
Three, think that this uplink scheduling fails, abandon this scheduling process.
Scene five
This application scene provides a kind of algorithm that back off time is generated based on synchronous random sequence.
The algorithm that back off time is generated based on synchronous random sequence, can be based on SFN (System Frame
Number, System Frame Number), Cell ID generate, can also be generated based on SFN, subframe numbers and Cell ID, can also based on SFN,
The synchronous random sequence of the system parameters generations such as timeslot number and Cell ID, can also be synchronized random based on the generation of other systems parameter
Sequence, and the back off time is calculated according to the synchronous random sequence.
Here, elaborating a kind of algorithm for generating back off time based on SFN, timeslot number and Cell ID, description is such as
Under:
Back off time can be obtained based on back off time sequence.Back off time sequence T (n) can be by two m-sequence x1(n)
And x2(n) it forms, generating formula indicates are as follows:
T (n)=(x1(n+Nc)+x2(n+Nc)) mod 2,
Wherein, NcIt is to guarantee uncorrelated nature between different sequences and specially increased state deviator, such as Nc=1600；
The x1(n) and x2(n) it is known sequence, is no longer described in detail herein.
Sequence x1(n) initial value are as follows:
x1(0)=1, x1(n)=0, n=1 ..., 30,
Corresponding iterative formula are as follows:
x1(n+31)=(x1(n+3)+x1(n)) 2 mod,
Sequence x2(n) initial value are as follows:
Wherein, nSFNFor SFN, nsFor timeslot number,For cell ID number.
Here, the algorithm of back off time, corresponding c are calculated for different system parametersinitValue it is different.
Corresponding iterative formula are as follows:
x2(n+31)=(x2(n+3)+x2(n+2)+x2(n+1)+x2(n)) 2 mod,
The back off time can be obtained based on the sequence of keeping out of the way of M-bit, such as:
Wherein, T indicates that SFN is nSFN, timeslot number ns, cell ID number beOn back off time, TmaxIndicate LAA system
The longest back off time of system definition, the M are the M-bit.
As it can be seen that compared with prior art, the embodiment of the present invention can guarantee the public affairs of resource contention between Wi-Fi and LAA system
The collision probability in LAA system uplink transmission process between UE is effectively reduced, it is ensured that the utilization rate of channel resource in levelling.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, the shape of hardware embodiment, software implementation or embodiment combining software and hardware aspects can be used in the present invention
Formula.Moreover, the present invention, which can be used, can use storage in the computer that one or more wherein includes computer usable program code
The form for the computer program product implemented on medium (including but not limited to magnetic disk storage and optical memory etc.).
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (20)
1. a kind of method of LAA system uplink transmission, which is characterized in that this method comprises:
Base station is to be arranged identical back off time with organizing scheduled UE, and be arranged for different groups of scheduled UE different when keeping out of the way
Between；
Wherein, described with the scheduled UE of group are as follows: in the same scheduling instance by all of the same LAA unauthorized cell serves
UE, or are as follows: by all UE of LAA unauthorized cell serves in the same subframe.
2. the method according to claim 1, wherein back off time is arranged in the base station, comprising:
The base station and the UE generate identical back off time in the corresponding time slot of same subframe；Alternatively, the base station is logical
It crosses physical downlink control channel PDCCH and the back off time of generation is handed down to the UE.
3. the method according to claim 1, wherein back off time is arranged in the base station, comprising:
The base station is based on system parameter and generates synchronous random sequence, and according to the synchronous random sequence calculate described in keep out of the way when
Between；Wherein,
The system parameter, comprising: System Frame Number and cell ID；Alternatively, System Frame Number, subframe numbers and cell ID；Alternatively, system
Frame number, timeslot number and cell ID.
4. the method according to claim 1, wherein this method further include:
The maximum listening period of setting is sent to the UE by the base station；The maximum listening period is for informing the UE letter
The maximum time that road is monitored；The maximum listening period are as follows: the sum of LBT duration, back off time and channel occupancy duration three.
5. the method according to claim 1, wherein this method further include:
The base station determines that one group of scheduled UE is again this when on the sub-frame of uplink of distribution without completing transmitting uplink data
Group scheduled UE distribute sub-frame of uplink, and since newly assigned sub-frame of uplink, when update is kept out of the way together with the scheduled UE of the group
Between；Alternatively,
The base station determines one group of scheduled UE when on the sub-frame of uplink of distribution without completing transmitting uplink data, with the group quilt
Scheduling UE simultaneously puts off this scheduling to be executed on next sub-frame of uplink, and since next sub-frame of uplink, with the group
Scheduled UE updates back off time together；Alternatively,
The base station determines that one group of scheduled UE when on the sub-frame of uplink of distribution without completing transmitting uplink data, determines this time
Uplink scheduling failure, terminates the scheduling process.
6. a kind of method of LAA system uplink transmission, which is characterized in that this method comprises:
UE carries out channel-monitoring；
If it is determined that LBT channel-monitoring result be it is busy, then execute keep out of the way；
If it is determined that channel status is the spare time after back off time arrival, then start to send upstream data；
Belong to the scheduled UE back off time having the same with group with the UE, different groups of scheduled UE is belonged to from the UE
With different back off times；
It is described with organizing scheduled UE are as follows: the same scheduling instance by all UE of the same LAA unauthorized cell serves or
Are as follows: by all UE of LAA unauthorized cell serves in the same subframe.
7. according to the method described in claim 6, it is characterized in that, this method further include:
The UE and base station generate identical back off time in the corresponding time slot of same subframe；Alternatively,
The UE receives the back off time that the base station that the base station is issued by PDCCH, described generates.
8. the method according to the description of claim 7 is characterized in that the UE generates the back off time, comprising:
The UE is based on system parameter and generates synchronous random sequence, and according to the synchronous random sequence calculate described in keep out of the way when
Between；Wherein,
The system parameter, comprising: System Frame Number and cell ID；Alternatively, System Frame Number, subframe numbers and cell ID；Alternatively, system
Frame number, timeslot number and cell ID.
9. according to the method described in claim 6, it is characterized in that, the UE carries out channel-monitoring, comprising:
The UE starts to carry out channel-monitoring when the sub-frame of uplink of distribution arrives；Alternatively,
The UE the previous subframe of the sub-frame of uplink of distribution ending for a period of time, start carry out channel-monitoring.
10. according to the method described in claim 6, it is characterized in that, this method further include:
The UE receives the maximum listening period of base station setting；The maximum listening period is for informing the UE channel-monitoring
Maximum time；The maximum listening period are as follows: the sum of LBT duration, back off time and channel occupancy duration three.
11. according to the method described in claim 6, it is characterized in that, this method further include:
The UE after no completion transmitting uplink data, is redistributed upper on the sub-frame of uplink that base station is distributed in the base station
Row subframe transmitting data, and back off time is updated together with the base station since the newly assigned sub-frame of uplink；Alternatively,
The UE after no completion transmitting uplink data, simultaneously adjusts this with the base station on the sub-frame of uplink that base station is distributed
Degree is put off to be executed on next sub-frame of uplink, and since next sub-frame of uplink, when update is kept out of the way together with the base station
Between；Alternatively,
The UE after no completion transmitting uplink data, determines that this uplink scheduling fails on the sub-frame of uplink that base station is distributed,
Terminate the scheduling process.
12. a kind of device of LAA system uplink transmission, which is characterized in that the device includes: setup module, for for group quilt
It dispatches UE and identical back off time is set, and different back off times is set for different groups of scheduled UE；
Wherein, described with the scheduled UE of group are as follows: in the same scheduling instance by all of the same LAA unauthorized cell serves
UE or are as follows: by all UE of LAA unauthorized cell serves in the same subframe.
13. device according to claim 12, which is characterized in that described device further include: sending module；
The setup module is also used to be arranged maximum listening period, and the maximum listening period is transmitted to the transmission mould
Block；
The sending module, for the maximum listening period to be transferred to UE；
Wherein, the maximum listening period is used to inform the maximum time of the UE channel-monitoring；The maximum listening period are as follows:
The sum of LBT duration, back off time and channel occupancy duration three.
14. device according to claim 12, which is characterized in that described device further include: determination processing module；
The determination processing module, for determining that one group of scheduled UE is passed on the sub-frame of uplink of distribution without completing upstream data
When defeated, sub-frame of uplink is distributed for the scheduled UE of the group again；Correspondingly,
The setup module is also used to since the newly assigned sub-frame of uplink, is scheduled to update together with UE with the group and keep out of the way
Time；Alternatively,
The determination processing module, for determining that one group of scheduled UE is passed on the sub-frame of uplink of distribution without completing upstream data
When defeated, this scheduling is put off simultaneously with the scheduled UE of the group and is executed on next sub-frame of uplink；Correspondingly,
The setup module is also used to since next sub-frame of uplink, is scheduled together with UE with the group and is updated back off time；Or
Person,
The determination processing module, for determining that one group of scheduled UE is passed on the sub-frame of uplink of distribution without completing upstream data
When defeated, determine that this uplink scheduling fails, terminate the scheduling process.
15. a kind of device of LAA system uplink transmission, which is characterized in that the device includes: to monitor module and transmission module；Its
In,
The monitoring module carries out channel-monitoring for UE；
The transmission module, for determine LBT channel-monitoring result be it is busy, then execute keep out of the way；It determines after back off time arrival
Channel status is the spare time, then starts to send upstream data；
Belong to the scheduled UE back off time having the same with group with the UE, different groups of scheduled UE is belonged to from the UE
With different back off times；
It is described with organizing scheduled UE are as follows: the same scheduling instance by all UE of the same LAA unauthorized cell serves or
Are as follows: by all UE of LAA unauthorized cell serves in the same subframe.
16. device according to claim 15, which is characterized in that the device further include: generation module；
The generation module is used to generate identical back off time in the corresponding time slot of same subframe with base station；Alternatively,
The back off time generated for receiving the base station that the base station is issued by PDCCH, described.
17. device according to claim 15, which is characterized in that the transmission module is also used to receive base station setting most
Big listening period；
The maximum listening period is used to inform the maximum time of the UE channel-monitoring；The maximum listening period are as follows: when LBT
The sum of long, back off time and channel occupancy duration three.
18. 6 described device according to claim 1, which is characterized in that
The transmission module is also used to UE on the sub-frame of uplink that base station is distributed after no completion transmitting uplink data, described
The sub-frame of uplink transmitting data that base station is redistributed；Correspondingly,
The generation module is also used to update back off time together with the base station since the newly assigned sub-frame of uplink；
Alternatively,
The transmission module, be also used to UE on the sub-frame of uplink that base station is distributed without completing transmitting uplink data after, and it is described
This scheduling is simultaneously put off in base station to be executed on next sub-frame of uplink；Correspondingly,
The generation module is also used to update back off time together with the base station since next sub-frame of uplink；Alternatively,
The transmission module is also used to UE and after no completion transmitting uplink data, determines this on the sub-frame of uplink that base station is distributed
Secondary uplink scheduling failure, terminates the scheduling process.
19. a kind of base station, which is characterized in that the base station includes: device described in any one of claim 12-14.
20. a kind of UE, which is characterized in that the UE includes: device described in any one of claim 15-18.
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| CN101242333A (en) * | 2008-02-29 | 2008-08-13 | 浙江大学 | A multi-address access method based on channel sensing and prediction |
| CN101815302A (en) * | 2010-01-07 | 2010-08-25 | 北京邮电大学 | Frequency spectrum access method using idle channel in cognitive radio network |
| CN104363657A (en) * | 2014-11-06 | 2015-02-18 | 东莞宇龙通信科技有限公司 | Device with base station function and method and system for data transmission |
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| CN101242333A (en) * | 2008-02-29 | 2008-08-13 | 浙江大学 | A multi-address access method based on channel sensing and prediction |
| CN101815302A (en) * | 2010-01-07 | 2010-08-25 | 北京邮电大学 | Frequency spectrum access method using idle channel in cognitive radio network |
| CN104363657A (en) * | 2014-11-06 | 2015-02-18 | 东莞宇龙通信科技有限公司 | Device with base station function and method and system for data transmission |
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