CN104469914B - Channel detection method and system, base station and terminal - Google Patents
Channel detection method and system, base station and terminal Download PDFInfo
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- CN104469914B CN104469914B CN201410757846.XA CN201410757846A CN104469914B CN 104469914 B CN104469914 B CN 104469914B CN 201410757846 A CN201410757846 A CN 201410757846A CN 104469914 B CN104469914 B CN 104469914B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/02—Power saving arrangements
- H04W52/0203—Power saving arrangements in the radio access network or backbone network of wireless communication networks
- H04W52/0206—Power saving arrangements in the radio access network or backbone network of wireless communication networks in access points, e.g. base stations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The present invention provides channel detection method and system, base station and terminal of a kind of LTE system in unauthorized band operation, wherein, the channel detection method includes：Channel-monitoring subframe using the period 1 as channel status detection cycle is set in the frame structure of the LTE system；Judge that the channel-monitoring subframe is consecutively detected whether the channel status reaches pre-determined number for the number of busy state；When the judgement channel-monitoring subframe is consecutively detected the channel status and reaches the pre-determined number for the number of busy state, the detection cycle of the channel-monitoring subframe is adjusted to the second round more than the period 1.Technical scheme may insure in LTE system on the premise of unauthorized frequency range works normally, and avoid LTE system from producing larger interference to other systems in unauthorized band operation, while reduce terminal and/or power consumption when base station performs Channel Detection.
Description
Technical field
The present invention relates to field of communication technology, in particular to a kind of letter of LTE system in unauthorized band operation
Channel Detection system, a kind of base station and a kind of terminal of road detection method, a kind of LTE system in unauthorized band operation.
Background technology
With the sharp increase of message volume, the network that the mandate frequency spectrum of 3GPP is increasingly not enough to provide higher holds
Amount.In order to further improve the utilization rate of frequency spectrum resource, 3GPP just discusses how unauthorized is used with the help of frequency spectrum is authorized
Frequency spectrum, such as 2.4GHz and 5GHz frequency ranges.These unlicensed spectrums are presently mainly that the systems such as Wi-Fi, bluetooth, radar, medical treatment exist
Use.
Under normal conditions, for authorized frequency range design access technology, as LTE (Long Term Evolution, for a long time
Evolution) be not suitable for using in unauthorized frequency range, because this kind of access technologies of LTE want spectrum efficiency and user experience optimization
Ask very high.However, carrier aggregation (Carrier Aggregation, CA) function allows and LTE is deployed in unauthorized frequency range is changed into
May.3GPP proposes the concept of LAA (access of LTE Assisted Access, LTE auxiliary), and the side of frequency spectrum is authorized by LTE
Help to use unlicensed spectrum.And unlicensed spectrum can have two kinds of working methods, one kind be supplement downlink (SDL,
Supplemental Downlink), i.e. only downlink transfer subframe；Another kind is tdd mode, both comprising downlink subframe or has been wrapped
Containing sub-frame of uplink.It can only be used by carrier aggregation technology to supplement downlink such case.And tdd mode is except can be by load
Ripple polymerization technique can also be used by DC (Dual Connectivity, doubly-linked lead to), can also independently used outside.
Compared to Wi-Fi systems, the LTE system for being operated in unauthorized frequency range has the ability to provide the spectrum efficiency of higher and more
Big coverage effect, while allow data traffic authorizing between frequency range and unauthorized frequency range without seaming and cutting based on same core net
Change.For user, it means that more preferable broadband experience, the speed of higher, more preferable stability and mobile facility.
The existing access technology used in unlicensed spectrum, such as Wi-Fi, has weaker antijamming capability.In order to
Avoid disturbing, many interference of Wi-Fi system designs avoid rule, such as CSMA/CD (Carrier Sense Multiple
Access/Collision Detection, csma/collision detection method), the basic principle of this method
It is that either terminal, first Monitor detection week before signaling or data are sent by the AP (Access Point, access point) of Wi-Fi
Whether have other APs or other-end in transmission/reception signaling or data, if so, then continuing to monitor, until listening to not if enclosing
Untill having；If a random number no, is generated as back off time, in this back off time, if not detected letter
Order or data transfer, then after back off time terminates, AP or terminal can start to send signaling or data.The process is as schemed
Shown in 1.
But due to there is good orthogonality to ensure that interference level in LTE network, so the uplink and downlink of base station and user
Transmission does not have to consider whether surrounding has other base stations or other users in transmission data.If LTE is used in unauthorized frequency range
When also without considering surrounding whether have other equipment use unauthorized frequency range, then great interference will be brought to Wi-Fi equipment.
Because as long as LTE has business to be just transmitted, without any monitoring rule, then Wi-Fi equipment when LTE has business transmission just
It cannot transmit, can only be transmitted when LTE business, can just detect channel clear to carry out data transmission.
As it can be seen that LTE network, when using unauthorized frequency range, one of most important key point is to ensure that LAA can be in justice
Coexisted on the basis of close friend with existing access technology (such as Wi-Fi).In order to preferably be coexisted with Wi-Fi, LTE needs one kind
LBT (Listen Before Talk, listem-before-talk) mechanism, and the LBT mechanism similar with Wi-Fi is mainly detecting channel
Busy may proceed to detect, and untill detecting channel idle, such LBT mechanism causes main body (base station or the end for performing LBT
End) the too many energy of consumption, it is unfavorable for energy saving.
Therefore, how to ensure in LTE system on the premise of unauthorized frequency range works normally, avoid LTE system from existing
During unauthorized band operation other systems are produced with larger interference, while reduce the equipment power dissipation in LTE system to become urgently
The technical problem of solution.
The content of the invention
The present invention is based at least one above-mentioned technical problem, it is proposed that a kind of new LTE system is in unauthorized frequency range
Channel Detection scheme during work, it can be ensured that in LTE system on the premise of unauthorized frequency range works normally, avoid LTE systems
Unite and in unauthorized band operation other systems are produced with larger interference, while reduce terminal and/or base station execution channel
Power consumption during detection.
In view of this, according to the first aspect of the invention, it is proposed that a kind of letter of LTE system in unauthorized band operation
Road detection method, including：Channel using the period 1 as channel status detection cycle is set in the frame structure of the LTE system
Monitor subframe；Judge that the channel-monitoring subframe is consecutively detected whether the channel status reaches pre- for the number of busy state
Determine number；The channel status, which is consecutively detected, in the judgement channel-monitoring subframe reaches described pre- for the number of busy state
When determining number, the detection cycle of the channel-monitoring subframe is adjusted to the second round more than the period 1.
In the technical scheme, by setting channel-monitoring subframe to be detected channel status so that LTE system works
In unauthorized frequency range, corresponding interference avoidance mechanism can be taken, channel status can be detected, and is being detected
Data are transmitted during channel idle, data are not transmitted when detecting channel busy, so that LTE system is in unauthorized frequency range work
It can coexist peacefully when making with being operated in the other systems (such as Wi-Fi systems) of unauthorized frequency range, to ensure that LTE system can
On the premise of unauthorized frequency range works normally, avoid LTE system in unauthorized band operation due to not interfering with avoidance machine
Make and the other systems with interference avoidance mechanism are produced with larger interference.
By judging that channel-monitoring subframe is consecutively detected number of the channel status as busy state using the period 1 and reaches
During to pre-determined number, the detection cycle of channel-monitoring subframe is adjusted to the second round more than the period 1 so that in channel
When being taken for a long time by other systems, the main body (base station and/or terminal) for performing Channel Detection can be with the longer cycle to letter
Road is detected, and when avoiding the channel from being in busy state, Channel Detection main body continues to be detected and increase with the less cycle
The power consumption of Channel Detection main body.
In the above-mentioned technical solutions, it is preferable that the detection cycle of the channel-monitoring subframe is being adjusted to described second
After cycle, further include：Detect the channel status as idle condition using the second round in the channel-monitoring subframe
When, the detection cycle of the channel-monitoring subframe is adjusted to the period 1 by the second round.
In the technical scheme, by detecting channel status as idle condition using second round in channel-monitoring subframe
When, the detection cycle of channel-monitoring subframe is adjusted to the period 1 by second round so that do not taken for a long time in channel
When, can be in time the less cycle by the period modulation of channel-monitoring subframe, avoid continue with the longer cycle to channel into
Row detects and influences the efficiency of system.
In the above-mentioned technical solutions, it is preferable that the detection cycle of the channel-monitoring subframe is being adjusted to described second
After cycle, further include：When determining new data to be transmitted, by the detection cycle of the channel-monitoring subframe by described
Two cycles are adjusted to the period 1.
In the technical scheme, when there is new data to be transmitted, not only so that data waiting for transmission are more, but also new
Data to be transmitted may be more sensitive to time delay, therefore by when determining new data to be transmitted, by channel-monitoring subframe
Detection cycle is adjusted to the period 1 by second round, enabling channel is detected with the less cycle, and then is ensured
The new data to be transmitted of timely processing.
In the above-mentioned technical solutions, it is preferable that according to the data volume size of data to be transmitted and/or the class of data to be transmitted
Type sets the pre-determined number, wherein, the pre-determined number is greater than or equal to 2 times.Preferably, if the number of the data to be transmitted
It is bigger according to measuring, and/or the type of the data to be transmitted is more sensitive to time delay, then the pre-determined number set is bigger.
Specifically, when the data volume of data to be transmitted is larger, in order to ensure system efficiency, it is necessary to less week
Phase is detected channel, therefore pre-determined number can be arranged to higher value；And data to be transmitted type to time delay compared with
When sensitive, in order to use channel to send data to be transmitted as early as possible, it is also desirable to channel is detected with the less cycle, because
Pre-determined number can be arranged to higher value by this.
In the above-mentioned technical solutions, it is preferable that the second round is the integral multiple of the period 1.
In the above-mentioned technical solutions, it is preferable that if the executive agent of the channel detection method is base station, the channel
Detection method further includes：The period 1, the pre-determined number and the second round are notified to terminal, so that the end
End is detected the state of up channel according to the period 1, the pre-determined number and the second round.
In the technical scheme, one side base station, can when being detected to channel (up channel and/or down channel)
Energy saving to be realized by the adjustment to channel detection period, another aspect base station can also notify corresponding parameter to terminal,
Realized with to ensure terminal when carrying out Channel Detection energy saving.I.e. base station and terminal can pass through the tune to channel detection period at the same time
It is whole to realize energy saving purpose.
In the above-mentioned technical solutions, it is preferable that if the executive agent of the channel detection method is base station, the channel
Detection method further includes：The period 1, the pre-determined number and the second round are notified to terminal, so that the end
When end uses discontinuous reception pattern according to the period 1, the pre-determined number and the second round setting terminal
Wake-up time and the length of one's sleep.
In the technical scheme, since base station is when detecting channel idle, terminal needs to detect PDCCH (Physical
Downlink Control Channel, physical layer descending control channel), and when detecting channel busy in base station, terminal can
To sleep, to save power consumption, therefore in base station Channel Detection is performed and terminal when need not perform Channel Detection, base station can
Will send the parameter that channel detection period is adjusted to terminal, received (i.e. from using discontinuous by terminal-pair
Discontinuous reception, DRX) pattern when wake-up time and the length of one's sleep be adjusted.Specifically, in base station
When detecting channel busy, terminal enters sleep state, and the cycle for detecting according to base station channel determines time that terminal wakes up,
With definite base station of waking up after sleep again to Channel Detection as a result, and then determining that next time enters the dormant time.
When changing in the cycle of base station detection channel, after terminal enters sleep state time for waking up also suitably adjusted.
In the above-mentioned technical solutions, it is preferable that if the executive agent of the channel detection method is terminal, in the frame
Before the step of channel-monitoring subframe is set in structure, further include：Receive period 1, described pre- that base station is sent
Determine number and the second round.
In the technical scheme, when performing Channel Detection, base station can will be adjusted channel detection period terminal
Parameter notify to terminal, realized with to ensure terminal when carrying out Channel Detection energy saving.
In the above-mentioned technical solutions, it is preferable that base station performs the second round set during the channel detection method
The second round set when performing the channel detection method less than or equal to terminal.In the technical scheme, due to base
The portfolio stood is more compared to terminal, therefore in order to ensure the data transmission efficiency of base station, base station can be set to perform channel
The long period (i.e. second round) of detection is less than or equal to the long period that terminal performs Channel Detection.
According to the second aspect of the invention, it is also proposed that a kind of Channel Detection of LTE system in unauthorized band operation
System, including：First setting unit, is examined for being set in the frame structure of the LTE system by channel status of the period 1
Survey the channel-monitoring subframe in cycle；Judging unit, for judging that the channel-monitoring subframe is consecutively detected the channel status
Whether reach pre-determined number for the number of busy state；Processing unit, for judging the channel-monitoring in the judging unit
Subframe is consecutively detected number that the channel status is busy state when reaching the pre-determined number, by channel-monitoring
The detection cycle of frame is adjusted to the second round more than the period 1.
In the technical scheme, by setting channel-monitoring subframe to be detected channel status so that LTE system works
In unauthorized frequency range, corresponding interference avoidance mechanism can be taken, channel status can be detected, and is being detected
Data are transmitted during channel idle, data are not transmitted when detecting channel busy, so that LTE system is in unauthorized frequency range work
It can coexist peacefully when making with being operated in the other systems (such as Wi-Fi systems) of unauthorized frequency range, to ensure that LTE system can
On the premise of unauthorized frequency range works normally, avoid LTE system in unauthorized band operation due to not interfering with avoidance machine
Make and the other systems with interference avoidance mechanism are produced with larger interference.
By judging that channel-monitoring subframe is consecutively detected number of the channel status as busy state using the period 1 and reaches
During to pre-determined number, the detection cycle of channel-monitoring subframe is adjusted to the second round more than the period 1 so that in channel
When being taken for a long time by other systems, the main body (base station and/or terminal) for performing Channel Detection can be with the longer cycle to letter
Road is detected, and when avoiding the channel from being in busy state, Channel Detection main body continues to be detected and increase with the less cycle
The power consumption of Channel Detection main body.
In the above-mentioned technical solutions, it is preferable that the processing unit is additionally operable to：By the detection of the channel-monitoring subframe
Period modulation be the second round after, if the channel-monitoring subframe detects the channel status with the second round
For idle condition, then the detection cycle of the channel-monitoring subframe is adjusted to the period 1 by the second round.
In the technical scheme, by detecting channel status as idle condition using second round in channel-monitoring subframe
When, the detection cycle of channel-monitoring subframe is adjusted to the period 1 by second round so that do not taken for a long time in channel
When, can be in time the less cycle by the period modulation of channel-monitoring subframe, avoid continue with the longer cycle to channel into
Row detects and influences the efficiency of system.
In the above-mentioned technical solutions, it is preferable that further include：Determination unit, in the processing unit by the channel
The detection cycle for monitoring subframe was adjusted to after the second round, it is determined whether has new data to be transmitted；The processing is single
Member is additionally operable to, when the determination unit determines new data to be transmitted, by the detection cycle of the channel-monitoring subframe by
The second round is adjusted to the period 1.
In the technical scheme, when there is new data to be transmitted, not only so that data waiting for transmission are more, but also new
Data to be transmitted may be more sensitive to time delay, therefore by when determining new data to be transmitted, by channel-monitoring subframe
Detection cycle is adjusted to the period 1 by second round, enabling channel is detected with the less cycle, and then is ensured
The new data to be transmitted of timely processing.
In the above-mentioned technical solutions, it is preferable that further include：Second setting unit, for the data according to data to be transmitted
The type for measuring size and/or data to be transmitted sets the pre-determined number, wherein, the pre-determined number is greater than or equal to 2 times.It is excellent
Selection of land, second setting unit are specifically used for：If the data volume of the data to be transmitted is bigger, and/or the number to be transmitted
According to type it is more sensitive to time delay, then the pre-determined number set is bigger.
Specifically, when the data volume of data to be transmitted is larger, in order to ensure system efficiency, it is necessary to less week
Phase is detected channel, therefore pre-determined number can be arranged to higher value；And data to be transmitted type to time delay compared with
When sensitive, in order to use channel to send data to be transmitted as early as possible, it is also desirable to channel is detected with the less cycle, because
Pre-determined number can be arranged to higher value by this.
In the above-mentioned technical solutions, it is preferable that the second round is the integral multiple of the period 1.
According to the third aspect of the invention we, it is also proposed that a kind of base station, including：As described in any of the above-described technical solution
Channel Detection system of the LTE system in unauthorized band operation.
In the above-mentioned technical solutions, it is preferable that the base station further includes：First notification unit, for by described first week
Phase, the pre-determined number and the second round notified to terminal, so that the terminal is according to period 1, described predetermined
Number and the second round are detected the state of up channel.
In the technical scheme, one side base station, can when being detected to channel (up channel and/or down channel)
Energy saving to be realized by the adjustment to channel detection period, another aspect base station can also notify corresponding parameter to terminal,
Realized with to ensure terminal when carrying out Channel Detection energy saving.I.e. base station and terminal can pass through the tune to channel detection period at the same time
It is whole to realize energy saving purpose.
In the above-mentioned technical solutions, it is preferable that the base station further includes：Second notification unit, for by described first week
Phase, the pre-determined number and the second round notified to terminal, so that the terminal is according to period 1, described predetermined
Wake-up time and the length of one's sleep when number and the second round set the terminal to use discontinuous reception pattern.
In the technical scheme, since base station is when detecting channel idle, terminal needs to detect PDCCH (Physical
Downlink Control Channel, physical layer descending control channel), and when detecting channel busy in base station, terminal can
To sleep, to save power consumption, therefore in base station Channel Detection is performed and terminal when need not perform Channel Detection, base station can
Will send the parameter that channel detection period is adjusted to terminal, by terminal-pair from using discontinuous reception pattern when
Wake-up time and the length of one's sleep be adjusted.Specifically, when detecting channel busy in base station, terminal enters sleep state,
And the cycle that channel is detected according to base station determines time that terminal wakes up, to wake up definite base station again to channel after sleep
Detection as a result, and then determine next time enter the dormant time.When changing in the cycle of base station detection channel, terminal
The time waken up after into sleep state is also suitably adjusted.
According to the fourth aspect of the invention, it is also proposed that a kind of terminal, including：As described in any of the above-described technical solution
Channel Detection system of the LTE system in unauthorized band operation.
In the above-mentioned technical solutions, it is preferable that the terminal further includes：Receiving unit, for receiving the institute of base station transmission
State period 1, the pre-determined number and the second round.
In the technical scheme, when performing Channel Detection, base station can will be adjusted channel detection period terminal
Parameter notify to terminal, realized with to ensure terminal when carrying out Channel Detection energy saving.
Pass through above technical scheme, it can be ensured that in LTE system on the premise of unauthorized frequency range works normally, avoid
LTE system produces other systems in unauthorized band operation larger interference, while reduces terminal and/or base station execution
Power consumption during Channel Detection.
Brief description of the drawings
Fig. 1 shows that the interference of Wi-Fi systems avoids the schematic diagram of rule；
Fig. 2 shows channel detection method of the LTE system according to an embodiment of the invention in unauthorized band operation
Schematic flow diagram；
Fig. 3 shows Channel Detection system of the LTE system according to an embodiment of the invention in unauthorized band operation
Schematic block diagram；
Fig. 4 shows the schematic block diagram of base station according to an embodiment of the invention；
Fig. 5 shows the schematic block diagram of terminal according to an embodiment of the invention；
Fig. 6 shows that LBT according to an embodiment of the invention periodically carries out the frame structure schematic diagram of Channel Detection；
Fig. 7 shows the schematic diagram that the detection cycle according to an embodiment of the invention to LBT is adjusted.
Embodiment
It is to better understand the objects, features and advantages of the present invention, below in conjunction with the accompanying drawings and specific real
Mode is applied the present invention is further described in detail.It should be noted that in the case where there is no conflict, the implementation of the application
Feature in example and embodiment can be mutually combined.
Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still, the present invention may be used also
To be implemented using other different from other modes described here, therefore, protection scope of the present invention and from described below
Specific embodiment limitation.
Fig. 2 shows channel detection method of the LTE system according to an embodiment of the invention in unauthorized band operation
Schematic flow diagram.
As shown in Fig. 2, Channel Detection side of the LTE system according to an embodiment of the invention in unauthorized band operation
Method, including：Step 202, the channel using the period 1 as channel status detection cycle is set in the frame structure of the LTE system
Monitor subframe；Step 204, judge that the channel-monitoring subframe is consecutively detected the channel status and is for the number of busy state
It is no to reach pre-determined number；Step 206, the channel status is consecutively detected as busy state in the judgement channel-monitoring subframe
Number when reaching the pre-determined number, the detection cycle of the channel-monitoring subframe was adjusted to more than the period 1
Second round.
In the technical scheme, by setting channel-monitoring subframe to be detected channel status so that LTE system works
In unauthorized frequency range, corresponding interference avoidance mechanism can be taken, channel status can be detected, and is being detected
Data are transmitted during channel idle, data are not transmitted when detecting channel busy, so that LTE system is in unauthorized frequency range work
It can coexist peacefully when making with being operated in the other systems (such as Wi-Fi systems) of unauthorized frequency range, to ensure that LTE system can
On the premise of unauthorized frequency range works normally, avoid LTE system in unauthorized band operation due to not interfering with avoidance machine
Make and the other systems with interference avoidance mechanism are produced with larger interference.
By judging that channel-monitoring subframe is consecutively detected number of the channel status as busy state using the period 1 and reaches
During to pre-determined number, the detection cycle of channel-monitoring subframe is adjusted to the second round more than the period 1 so that in channel
When being taken for a long time by other systems, the main body (base station and/or terminal) for performing Channel Detection can be with the longer cycle to letter
Road is detected, and when avoiding the channel from being in busy state, Channel Detection main body continues to be detected and increase with the less cycle
The power consumption of Channel Detection main body.
In the above-mentioned technical solutions, it is preferable that the detection cycle of the channel-monitoring subframe is being adjusted to described second
After cycle, further include：Detect the channel status as idle condition using the second round in the channel-monitoring subframe
When, the detection cycle of the channel-monitoring subframe is adjusted to the period 1 by the second round.
In the technical scheme, by detecting channel status as idle condition using second round in channel-monitoring subframe
When, the detection cycle of channel-monitoring subframe is adjusted to the period 1 by second round so that do not taken for a long time in channel
When, can be in time the less cycle by the period modulation of channel-monitoring subframe, avoid continue with the longer cycle to channel into
Row detects and influences the efficiency of system.
In the above-mentioned technical solutions, it is preferable that the detection cycle of the channel-monitoring subframe is being adjusted to described second
After cycle, further include：When determining new data to be transmitted, by the detection cycle of the channel-monitoring subframe by described
Two cycles are adjusted to the period 1.
In the technical scheme, when there is new data to be transmitted, not only so that data waiting for transmission are more, but also new
Data to be transmitted may be more sensitive to time delay, therefore by when determining new data to be transmitted, by channel-monitoring subframe
Detection cycle is adjusted to the period 1 by second round, enabling channel is detected with the less cycle, and then is ensured
The new data to be transmitted of timely processing.
In the above-mentioned technical solutions, it is preferable that according to the data volume size of data to be transmitted and/or the class of data to be transmitted
Type sets the pre-determined number, wherein, the pre-determined number is greater than or equal to 2 times.Preferably, if the number of the data to be transmitted
It is bigger according to measuring, and/or the type of the data to be transmitted is more sensitive to time delay, then the pre-determined number set is bigger.
Specifically, when the data volume of data to be transmitted is larger, in order to ensure system efficiency, it is necessary to less week
Phase is detected channel, therefore pre-determined number can be arranged to higher value；And data to be transmitted type to time delay compared with
When sensitive, in order to use channel to send data to be transmitted as early as possible, it is also desirable to channel is detected with the less cycle, because
Pre-determined number can be arranged to higher value by this.
In the above-mentioned technical solutions, it is preferable that the second round is the integral multiple of the period 1.
In the above-mentioned technical solutions, it is preferable that if the executive agent of the channel detection method is base station, the channel
Detection method further includes：The period 1, the pre-determined number and the second round are notified to terminal, so that the end
End is detected the state of up channel according to the period 1, the pre-determined number and the second round.
In the technical scheme, one side base station, can when being detected to channel (up channel and/or down channel)
Energy saving to be realized by the adjustment to channel detection period, another aspect base station can also notify corresponding parameter to terminal,
Realized with to ensure terminal when carrying out Channel Detection energy saving.I.e. base station and terminal can pass through the tune to channel detection period at the same time
It is whole to realize energy saving purpose.
In the above-mentioned technical solutions, it is preferable that if the executive agent of the channel detection method is base station, the channel
Detection method further includes：The period 1, the pre-determined number and the second round are notified to terminal, so that the end
When end uses discontinuous reception pattern according to the period 1, the pre-determined number and the second round setting terminal
Wake-up time and the length of one's sleep.
In the technical scheme, since base station is when detecting channel idle, terminal needs to detect PDCCH (Physical
Downlink Control Channel, physical layer descending control channel), and when detecting channel busy in base station, terminal can
To sleep, to save power consumption, therefore in base station Channel Detection is performed and terminal when need not perform Channel Detection, base station can
Will send the parameter that channel detection period is adjusted to terminal, by terminal-pair from using discontinuous reception pattern when
Wake-up time and the length of one's sleep be adjusted.Specifically, when detecting channel busy in base station, terminal enters sleep state,
And the cycle that channel is detected according to base station determines time that terminal wakes up, to wake up definite base station again to channel after sleep
Detection as a result, and then determine next time enter the dormant time.When changing in the cycle of base station detection channel, terminal
The time waken up after into sleep state is also suitably adjusted.
In the above-mentioned technical solutions, it is preferable that if the executive agent of the channel detection method is terminal, in the frame
Before the step of channel-monitoring subframe is set in structure, further include：Receive period 1, described pre- that base station is sent
Determine number and the second round.
In the technical scheme, when performing Channel Detection, base station can will be adjusted channel detection period terminal
Parameter notify to terminal, realized with to ensure terminal when carrying out Channel Detection energy saving.
In the above-mentioned technical solutions, it is preferable that base station performs the second round set during the channel detection method
The second round set when performing the channel detection method less than or equal to terminal.In the technical scheme, due to base
The portfolio stood is more compared to terminal, therefore in order to ensure the data transmission efficiency of base station, base station can be set to perform channel
The long period (i.e. second round) of detection is less than or equal to the long period that terminal performs Channel Detection.
Fig. 3 shows Channel Detection system of the LTE system according to an embodiment of the invention in unauthorized band operation
Schematic block diagram.
As shown in figure 3, Channel Detection system of the LTE system according to an embodiment of the invention in unauthorized band operation
300, including：First setting unit 302, for being set in the frame structure of the LTE system using the period 1 as channel status
The channel-monitoring subframe of detection cycle；Judging unit 304, for judging that the channel-monitoring subframe is consecutively detected the channel
Whether state reaches pre-determined number for the number of busy state；Processing unit 306, for judging institute in the judging unit 304
State channel-monitoring subframe and be consecutively detected number that the channel status is busy state when reaching the pre-determined number, will described in
The detection cycle of channel-monitoring subframe is adjusted to the second round more than the period 1.
In the technical scheme, by setting channel-monitoring subframe to be detected channel status so that LTE system works
In unauthorized frequency range, corresponding interference avoidance mechanism can be taken, channel status can be detected, and is being detected
Data are transmitted during channel idle, data are not transmitted when detecting channel busy, so that LTE system is in unauthorized frequency range work
It can coexist peacefully when making with being operated in the other systems (such as Wi-Fi systems) of unauthorized frequency range, to ensure that LTE system can
On the premise of unauthorized frequency range works normally, avoid LTE system in unauthorized band operation due to not interfering with avoidance machine
Make and the other systems with interference avoidance mechanism are produced with larger interference.
By judging that channel-monitoring subframe is consecutively detected number of the channel status as busy state using the period 1 and reaches
During to pre-determined number, the detection cycle of channel-monitoring subframe is adjusted to the second round more than the period 1 so that in channel
When being taken for a long time by other systems, the main body (base station and/or terminal) for performing Channel Detection can be with the longer cycle to letter
Road is detected, and when avoiding the channel from being in busy state, Channel Detection main body continues to be detected and increase with the less cycle
The power consumption of Channel Detection main body.
In the above-mentioned technical solutions, it is preferable that the processing unit 306 is additionally operable to：By the channel-monitoring subframe
Detection cycle was adjusted to after the second round, if the channel-monitoring subframe detects the channel with the second round
State is idle condition, then is adjusted to the detection cycle of the channel-monitoring subframe described first week by the second round
Phase.
In the technical scheme, by detecting channel status as idle condition using second round in channel-monitoring subframe
When, the detection cycle of channel-monitoring subframe is adjusted to the period 1 by second round so that do not taken for a long time in channel
When, can be in time the less cycle by the period modulation of channel-monitoring subframe, avoid continue with the longer cycle to channel into
Row detects and influences the efficiency of system.
In the above-mentioned technical solutions, it is preferable that further include：Determination unit 308, in the processing unit 306 by institute
The detection cycle for stating channel-monitoring subframe was adjusted to after the second round, it is determined whether has new data to be transmitted；It is described
Processing unit 306 is additionally operable to, when the determination unit 308 determines new data to be transmitted, by the channel-monitoring subframe
Detection cycle the period 1 is adjusted to by the second round.
In the technical scheme, when there is new data to be transmitted, not only so that data waiting for transmission are more, but also new
Data to be transmitted may be more sensitive to time delay, therefore by when determining new data to be transmitted, by channel-monitoring subframe
Detection cycle is adjusted to the period 1 by second round, enabling channel is detected with the less cycle, and then is ensured
The new data to be transmitted of timely processing.
In the above-mentioned technical solutions, it is preferable that further include：Second setting unit 310, for the number according to data to be transmitted
According to the type of amount size and/or data to be transmitted, the pre-determined number is set, wherein, the pre-determined number is greater than or equal to 2 times.
Preferably, second setting unit 310 is specifically used for：If the data volume of the data to be transmitted is bigger, and/or described to be passed
The type of transmission of data is more sensitive to time delay, then the pre-determined number set is bigger.
Specifically, when the data volume of data to be transmitted is larger, in order to ensure system efficiency, it is necessary to less week
Phase is detected channel, therefore pre-determined number can be arranged to higher value；And data to be transmitted type to time delay compared with
When sensitive, in order to use channel to send data to be transmitted as early as possible, it is also desirable to channel is detected with the less cycle, because
Pre-determined number can be arranged to higher value by this.
In the above-mentioned technical solutions, it is preferable that the second round is the integral multiple of the period 1.
Fig. 4 shows the schematic block diagram of base station according to an embodiment of the invention.
As shown in figure 4, base station 400 according to an embodiment of the invention, including：LTE system as shown in Figure 3 is awarded non-
Weigh the Channel Detection system 300 during band operation.
In the above-mentioned technical solutions, it is preferable that the base station 400 further includes：First notification unit 402, for by described in
Period 1, the pre-determined number and the second round are notified to terminal, so that the terminal is according to the period 1, institute
State pre-determined number and the second round is detected the state of up channel.
In the technical scheme, one side base station 400 is detected to channel (up channel and/or down channel)
When, it can be realized by the adjustment to channel detection period energy saving, another aspect base station 400 can also notify corresponding parameter
To terminal, realized with to ensure terminal when carrying out Channel Detection energy saving.I.e. base station 400 and terminal can be at the same time by examining channel
Energy saving purpose is realized in the adjustment for surveying the cycle.
In the above-mentioned technical solutions, it is preferable that the base station 400 further includes：Second notification unit 404, for by described in
Period 1, the pre-determined number and the second round are notified to terminal, so that the terminal is according to the period 1, institute
State the wake-up time and the length of one's sleep of pre-determined number and the second round when setting the terminal to use discontinuous reception pattern.
In the technical scheme, since base station 400 is when detecting channel idle, terminal needs to detect PDCCH, and in base
400 are stood when detecting channel busy, terminal can sleep, to save power consumption, thus perform in base station 400 Channel Detection and
When terminal need not perform Channel Detection, base station 400 can will be sent to terminal the parameter that channel detection period is adjusted,
Wake-up time and the length of one's sleep during by terminal-pair from using discontinuous reception pattern are adjusted.Specifically, in base station
400 when detecting channel busy, and terminal enters sleep state, and the cycle for detecting according to base station 400 channel determines that terminal is waken up
Time, with sleep after wake up definite base station 400 again to Channel Detection as a result, and then determine next time enter sleep shape
The time of state.When changing in the cycle that channel is detected in base station 400, after terminal enters sleep state time for waking up also carry out
Appropriate adjustment.
Fig. 5 shows the schematic block diagram of terminal according to an embodiment of the invention.
As shown in figure 5, terminal 500 according to an embodiment of the invention, including：LTE system as shown in Figure 3 is awarded non-
Weigh the Channel Detection system 300 during band operation.
In the above-mentioned technical solutions, it is preferable that the terminal 500 further includes：Receiving unit 502, for receiving base station hair
The period 1, the pre-determined number and the second round sent.
In the technical scheme, when performing Channel Detection, base station can will adjust channel detection period terminal 500
Whole parameter notified to terminal 500, is realized with to ensure terminal 500 when carrying out Channel Detection energy saving.
In conclusion a kind of energy saving LBT testing mechanisms of major design of the present invention, mainly contain LBT detection times
Short cycle, the long period of LBT detection times repetition and LBT detection time repetition periods from the short cycle repeated is changed into long period
Criterion and the LBT detection time repetition periods short-period criterion is changed into from long period, it is specific as follows：
LBT detection times were repeated with certain cycle, for purposes of illustration only, being the short cycle by the period definition
TS, such as 10ms.As shown in fig. 6, LBT executive agents (base station and/or terminal) are with short cycle TSCarry out LBT detections.
When being continuously detected channel busy in order to avoid LBT executive agents, Channel Detection is still frequently carried out, therefore can be
LBT executive agents are in continuous N number of short cycle, and when LBT testing results are channel busy, the LBT detection repetition periods are arranged to
Long period TL。
It should be noted that：
1st, N values can take the natural number more than or equal to 2, and can be according to specific portfolio or business to delay sensitive
Spend to determine, for example portfolio is big or business is to delay sensitive, then N values are larger；Otherwise, N values can be smaller.
2nd, N values can have multiple candidate values, it is specifically used which can be semi-statically configured.
3、TLValue is more than TSIt is worth, under preferable case, TLValue can be TSThe integral multiple of value, such as 2 times or more than 2 times.
Wherein, if the LBT detection repetition periods detect channel idle when being long period, LBT can be detected and repeats week
Phase is adjusted to the short cycle by long period, and otherwise, the LBT detection repetition periods continue as long period.
Specifically, as shown in fig. 7, LBT executive agents are in 3 continuous short cycle TsSLBT detection times in (such as 10ms)
Inside detect channel busy, then following LBT detects short cycle TSIt is adjusted to long period TL(30ms), when in ensuing long period
TLLBT detection times detect channel idle, then LBT detects long period TLBecome short cycle TS。
In addition, LBT detection cycles are being adjusted to long period TLAfterwards, if receiving new business, LBT can be examined
Survey period modulation is short cycle TS。
Preferably, base station is that the LBT set detects long period than terminal as LBT executive agents as LBT executive agents
It is that the LBT detection long periods set are short.
Base station is needed using RRC signaling or the LBT of base station and terminal is detected the short cycle by other signalings, LBT is continuously detected
As a result for channel busy times N and LBT detect long period notify to terminal so that terminal perform Channel Detection or set from
Wake-up time and the length of one's sleep when being worked using discontinuous reception pattern.
Technical scheme is described in detail above in association with attached drawing, the present invention proposes a kind of new LTE system and exists
Channel Detection scheme during unauthorized band operation, it can be ensured that in LTE system on the premise of unauthorized frequency range works normally,
Avoid LTE system that in unauthorized band operation other systems are produced with larger interference, while reduce terminal and/or base station
Perform power consumption during Channel Detection.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the invention, for the skill of this area
For art personnel, the invention may be variously modified and varied.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should all be included in the protection scope of the present invention.
Claims (19)
- A kind of 1. channel detection method of LTE system in unauthorized band operation, it is characterised in that including：Channel-monitoring subframe using the period 1 as channel status detection cycle is set in the frame structure of the LTE system；Judge that the channel-monitoring subframe is consecutively detected whether the channel status reaches predetermined time for the number of busy state Number；The channel status, which is consecutively detected, in the judgement channel-monitoring subframe reaches described predetermined for the number of busy state During number, the detection cycle of the channel-monitoring subframe is adjusted to the second round more than the period 1；When determining new data to be transmitted, the detection cycle of the channel-monitoring subframe is adjusted to by the second round The period 1.
- 2. channel detection method of the LTE system according to claim 1 in unauthorized band operation, it is characterised in that After the detection cycle of the channel-monitoring subframe is adjusted to the second round, further include：When the channel-monitoring subframe detects the channel status as idle condition using the second round, by the channel The detection cycle for monitoring subframe is adjusted to the period 1 by the second round.
- 3. channel detection method of the LTE system according to claim 1 in unauthorized band operation, it is characterised in that The pre-determined number is set according to the type of the data volume size of data to be transmitted and/or data to be transmitted, wherein, it is described predetermined Number is greater than or equal to 2 times.
- 4. channel detection method of the LTE system according to claim 3 in unauthorized band operation, it is characterised in that：If the data volume of the data to be transmitted is bigger, and/or the type of the data to be transmitted is more sensitive to time delay, then sets The pre-determined number it is bigger.
- 5. channel detection method of the LTE system according to claim 1 in unauthorized band operation, it is characterised in that The second round is the integral multiple of the period 1.
- 6. channel detection method of the LTE system according to any one of claim 1 to 5 in unauthorized band operation, If it is characterized in that, the executive agent of the channel detection method is base station, the channel detection method further includes：The period 1, the pre-determined number and the second round are notified to terminal, so that the terminal is according to Period 1, the pre-determined number and the second round are detected the state of up channel.
- 7. channel detection method of the LTE system according to any one of claim 1 to 5 in unauthorized band operation, If it is characterized in that, the executive agent of the channel detection method is base station, the channel detection method further includes：The period 1, the pre-determined number and the second round are notified to terminal, so that the terminal is according to Period 1, the pre-determined number and the second round setting terminal use wake-up time during discontinuous reception pattern And the length of one's sleep.
- 8. channel detection method of the LTE system according to any one of claim 1 to 5 in unauthorized band operation, If it is characterized in that, the executive agent of the channel detection method is terminal, the channel is set to supervise in the frame structure Before the step of listening subframe, further include：Receive the period 1, the pre-determined number and the second round that base station is sent.
- 9. channel detection method of the LTE system according to any one of claim 1 to 5 in unauthorized band operation, It is characterized in that：Base station performs the second round set during the channel detection method less than or equal to the terminal execution channel inspection The second round set during survey method.
- A kind of 10. Channel Detection system of LTE system in unauthorized band operation, it is characterised in that including：First setting unit, for being set in the frame structure of the LTE system using the period 1 as channel status detection cycle Channel-monitoring subframe；Judging unit, is for the number of busy state for judging that the channel-monitoring subframe is consecutively detected the channel status It is no to reach pre-determined number；Processing unit, is numerous for judging that the channel-monitoring subframe is consecutively detected the channel status in the judging unit When the number of busy condition reaches the pre-determined number, the detection cycle of the channel-monitoring subframe is adjusted to be more than described first The second round in cycle；Determination unit, for the detection cycle of the channel-monitoring subframe to be adjusted to the second round in the processing unit Afterwards, it is determined whether have new data to be transmitted；The processing unit is additionally operable to, when the determination unit determines new data to be transmitted, by channel-monitoring The detection cycle of frame is adjusted to the period 1 by the second round.
- 11. Channel Detection system of the LTE system according to claim 10 in unauthorized band operation, its feature exist In the processing unit is additionally operable to：After the detection cycle of the channel-monitoring subframe is adjusted to the second round, if the channel-monitoring subframe with The second round detects that the channel status is idle condition, then by the detection cycle of the channel-monitoring subframe by described Second round is adjusted to the period 1.
- 12. Channel Detection system of the LTE system according to claim 10 in unauthorized band operation, its feature exist In further including：Second setting unit, for described in the setting of the type of the data volume size according to data to be transmitted and/or data to be transmitted Pre-determined number, wherein, the pre-determined number is greater than or equal to 2 times.
- 13. Channel Detection system of the LTE system according to claim 12 in unauthorized band operation, its feature exist In second setting unit is specifically used for：If the data volume of the data to be transmitted is bigger, and/or the type of the data to be transmitted is more sensitive to time delay, then sets The pre-determined number it is bigger.
- 14. Channel Detection system of the LTE system according to claim 10 in unauthorized band operation, its feature exist In the second round is the integral multiple of the period 1.
- A kind of 15. base station, it is characterised in that including：LTE system as any one of claim 10 to 14 is unauthorized Channel Detection system during band operation.
- 16. base station according to claim 15, it is characterised in that further include：First notification unit, for notifying the period 1, the pre-determined number and the second round to terminal, so that The terminal is detected the state of up channel according to the period 1, the pre-determined number and the second round.
- 17. base station according to claim 15, it is characterised in that further include：Second notification unit, for notifying the period 1, the pre-determined number and the second round to terminal, so that The terminal sets the terminal to be received using discontinuous according to the period 1, the pre-determined number and the second round Wake-up time and the length of one's sleep during pattern.
- A kind of 18. terminal, it is characterised in that including：LTE system as any one of claim 10 to 14 is unauthorized Channel Detection system during band operation.
- 19. terminal according to claim 18, it is characterised in that further include：Receiving unit, for receiving the period 1, the pre-determined number and the second round of base station transmission.
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