CN106171036B - The data transmission method and network node of wireless network - Google Patents

The data transmission method and network node of wireless network Download PDF

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Publication number
CN106171036B
CN106171036B CN201580002252.0A CN201580002252A CN106171036B CN 106171036 B CN106171036 B CN 106171036B CN 201580002252 A CN201580002252 A CN 201580002252A CN 106171036 B CN106171036 B CN 106171036B
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radio frames
time domain
domain length
network
sending node
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CN106171036A (en
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李�远
李强
马莎
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the invention discloses the data transmission method of wireless network and network node, the time domain length of the radio frames in network node configuration unlicensed spectrum so that different network nodes can busy channel, to realize the fairness of resource occupying.The method comprise the steps that network sending node determines the time domain length of next or multiple radio frames of current radio frames in unlicensed spectrum；Network sending node configures next or multiple radio frames according to the time domain length of next or multiple radio frames；When detecting idle channel by CCA, next or multiple radio frames of configuration are sent to network receiving node by network sending node.

Description

The data transmission method and network node of wireless network
Technical field
The present invention relates to the communications field more particularly to the data transmission methods and network node of wireless network.
Background technique
Long term evolution (Long Term Evolution, LTE) system and long-term evolution upgrading (Long Term Evolution-Advanced, LTE-A) system use orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) technology, for data transmission least resource unit be resource particle (Resource Element, RE), 1 subcarrier on 1 OFDM symbol and frequency domain in corresponding time domain；On this basis, resource block (Resource Block, RB it) is made of subcarrier continuous on OFDM symbol continuous in multiple time domains and frequency domain, is the basic unit of scheduling of resource.
Further expanding bandwidth is to promote the directly effective approach of network capacity, still, existing LTE and lte-a system It is all work in authorization frequency spectrum (licensed spectrum), on the one hand available authorization frequency spectrum resource is very limited, another Aspect authorization frequency spectrum is usually bought by operator and is obtained, and the with high costs of authorization frequency spectrum is obtained.In comparison, unlicensed spectrum (unlicensed spectrum) not only purchase cost is cheap, but also has usable bandwidth abundant, it is only necessary to meet transmitting function The laws and regulations requirements such as rate, band outward leakage and channel access are coexisted with realizing with other operators and wireless communication standard, therefore are transported Battalion quotient will meet the important directions of business demand using unlicensed spectrum transmission data as future mobile communications.Authorization auxiliary connects A kind of typical case scene for entering LTE (Licensed-Assisted Access using LTE, LAA-LTE) system is will to award Frequency spectrum is weighed as main member carrier (Primary Component Carrier, PCC), is carried unlicensed spectrum as auxiliary member Wave (Secondary Component Carrier, SCC) upload is input into the polymerization of row carrier wave, base station (Evolved NodeB, eNB) Pass through Physical Downlink Control Channel (Physical Downlink Control Channel, the PDCCH) scheduling on authorization frequency spectrum Data transmission in unlicensed spectrum.
Due to multi-operator, condition of multi-system coexistence, LTE is not only faced from different operators in unlicensed spectrum, but also It faces from different wireless communication system, such as the co-channel interference of Wifi system, due to non-same operator or same channel radio The sending node of letter system can not uniformly carry out planning deployment, these sending nodes might have lower geographical isolation, because This this co-channel interference from different operator, different system is tighter compared to the interference between same operator's different base station Weight.In order to avoid co-channel interference causes serious influence to transmission performance, the regulation in Countries area defines first to listen to be sent out afterwards The Channel Access Mechanism of (Listen-Before-Talk, LBT), it is desirable that node first carries out channel sense before sending the information, That is idle channel evaluation and test (Clear Channel Assessment, CCA), a wireless frame period includes Channel holding time (Channel Occupancy Time, COT) and free time (IDle Period, IDP), wherein Channel holding time is hair The time for sending node continuous busy channel after CCA detects channel idle to send information, time domain length 1ms to 10ms it Between, 5%, the CCA detection that free time length is at least Channel holding time is located at the tail portion of IDP；Sending node is in the CCA time Interior execution channel sense, wherein the duration of CCA is not less than 20 μ s；When CCA detects that channel is occupied, then next one Not sending service in the Channel holding time of a wireless frame period, on the contrary it is channel idle, then in next Channel holding time Interior transmission business；Sending node enters the IDP of the radio frames all after COT terminates in the case of two kinds, and in the tail portion IDP CCA is that the execution of next radio frames is listened to.By taking the regulation of European Telecommunications Standards Institute ETSI as an example, first listen send out afterwards LBT include two Kind intercept strategy: the equipment (Frame Based Equipment, FBE) based on frame and equipment (the Load Based based on load Equipment, LBE), wherein the former requires to listen to and send to abide by a fixed frame structure, and sending node is held within the CCA time Row channel sense is not sent out in the Channel holding time in a next frame period then when CCA detects that channel is occupied Information, it is on the contrary then information is sent in Channel holding time；And LBE defines a fallback mechanism, when CCA detects channel quilt Occupancy or eNB terminate enter an extension CCA after channel occupancy, and counter be initialized as a random integers, often A channel sense is carried out every CCA duration, and counter is subtracted one if detecting channel idle, the counting until extending CCA Busy channel sends business again after device zero.LBE strategy can pass through the long node for making to compete same channel of randomization rollback window Fair send opportunity is obtained, but since the time span that sending node listens to waiting is uncertain, receiving node is not aware that The initial position that data are sent, it is therefore desirable to continue blind Detecting channel to obtain synchronizing information, to improve receiving device Detection complexity and energy consumption, the initial position that in addition usual signal is sent may be not on sub-frame boundary, and sending node needs Additional expense notifies the number of symbols that data in first subframe are transmitted to receiving node；In comparison, FBE strategy is more suitable For the fixation frame structure design of LTE system, receiving node only needs to detect synchronizing information in the initial position of each radio frames , synchronous detection complexity is greatly saved, but since the CCA of FBE always occurs in fixed position, channel access machine Meeting and channel occupancy fairness are all restricted.
Prior art one, a kind of unlicensed spectrum channel resource occupancy method based on FBE intercept strategy are as follows: adjusting The eNB of whole different operators sends the time of information frame in unlicensed spectrum, so that the eNB of different operators is unauthorized It keeps synchronizing on frequency spectrum, i.e., the CCA of each eNB is all in the region CCA of other adjacent eNB.
But there is no return link between different operators, realize that the synchronization complexity of unlicensed spectrum is higher, Er Qie It is difficult to accomplish that all eNB keep preferably synchronous in one biggish geographic area, different operators are on authorization frequency spectrum Usually asynchronous, if to realize the synchronization in unlicensed spectrum, the authorization frequency spectrum and unlicensed spectrum of same eNB is then Be it is asynchronous, lead to authorize the implementation complexity that control signaling, adjacent cell measurement etc. of unlicensed spectrum are transmitted on frequency spectrum in this way Increase, when multiple eNB are fully synchronized, the position of their CCA is also alignment, it is easy to it is (i.e. multiple that node coexists collision occur CCA is executed in the same time, channel idle is detected and occupies identical time-domain resource) situation, cause serious channel altogether dry Disturb problem.
Prior art two, it is as follows that another unlicensed spectrum channel resource based on FBE intercept strategy occupies method: For eNB when being seized for a period of time less than channel resource, eNB replaces the configuration of wireless frame length, such as eNB2 keeps wireless frame length Degree is 6ms, and it is 4ms that eNB1, which replaces wireless frame length, i.e., is expanded CCA, IDP period for identical relative position occur Exhibition, so that its region IDP that there is certain probability to snap to other eNB CCA.
But it is interior at the same time, the number of CCA, IDP appearance is unequal in the radio frames of different length, together Difference eNB necessarily will not be identical according to the number of the detection busy channel of CCA in the equal times, this causes channel resource to occupy not It is fair.
Summary of the invention
The embodiment of the invention provides the data transmission method of wireless network and network nodes, configure for network node non- Authorize frequency spectrum on radio frames time domain length so that different network nodes can busy channel, to realize Internet resources The fairness of occupancy.
In view of this, first aspect present invention provides a kind of network sending node, comprising:
Determining module, the time domain for determining next or multiple radio frames of current radio frames in unlicensed spectrum are long Degree, the time domain length Length discrepancy of the time domain length of described next or multiple radio frames and the current radio frames；
Configuration module configures described next or more for the time domain length according to described next or multiple radio frames A radio frames；
Sending module, for when by idle channel evaluate and test CCA detect idle channel when, by the described next of configuration Or multiple radio frames are sent to network receiving node.
In conjunction with first aspect present invention, in first aspect present invention first embodiment, the network sending node is also wrapped It includes: obtaining module；
The acquisition module, for obtaining the time domain length of current radio frames；
The determining module, when specifically for determining one or more different from the time domain length of the current radio frames Length of field, it is each wireless in described next or multiple radio frames as the time domain length of described next or multiple radio frames The time domain length of frame is that determining module generates at random between most short radio frames time domain length and longest radio frames time domain length.
In conjunction with first aspect present invention, in first aspect present invention second embodiment,
The sending module is also used to for the information of the time domain length of described next or multiple radio frames being sent to described Network receiving node.
In conjunction with first aspect present invention, in first aspect present invention third embodiment,
The determining module, specifically for choosing a radio frames time domain length sequence in radio frames time domain length sequence sets Column, the time domain length of described next or multiple radio frames are determined according to the radio frames time domain length sequence, wherein the nothing Line frame time domain length sequence sets are the set of the radio frames time domain length sequence, and the radio frames time domain length sequence includes more A element, the numerical value of at least one element and the numerical value of other elements are unequal, and the corresponding nothing of numerical value of each element The time domain length of line frame.
In conjunction with first aspect present invention third embodiment, in the 4th embodiment of first aspect present invention,
The acquisition module is also used to obtain the mark of the radio frames time domain length sequence；
The sending module is also used to the mark being sent to the network receiving node.
In conjunction with first aspect present invention third embodiment, in the 5th embodiment of first aspect present invention, the network Sending node further include: execution module；
The execution module, for generating radio frames time domain length sequence group according to the radio frames time domain length sequence；
The sending module is also used to for the generating mode of radio frames time domain length sequence group being sent to the network and receives Node.
In conjunction with the 5th embodiment of first aspect present invention, in first aspect present invention sixth embodiment,
The execution module is specifically used for executing cyclic shift to the radio frames time domain length sequence, generates radio frames Time domain length sequence group.
In conjunction with the 5th embodiment of first aspect present invention, in the 7th embodiment of first aspect present invention,
The execution module is specifically used for executing period expansion to the radio frames time domain length sequence, generates radio frames Time domain length sequence group.
Second aspect of the present invention provides a kind of network receiving node, comprising:
Module is obtained, for obtaining the time domain length of next or multiple radio frames, described next or multiple radio frames Time domain length and unlicensed spectrum on received current radio frames time domain length Length discrepancy；
Receiving module receives network sending node hair for the time domain length according to described next or multiple radio frames The next or multiple radio frames sent.
In conjunction with second aspect of the present invention, in second aspect of the present invention first embodiment,
The acquisition module, the described next or multiple radio frames sent specifically for receiving the network sending node Time domain length information, the time domain length of each radio frames is that the network sends section in described next or multiple radio frames Point generates at random between most short radio frames time domain length and longest radio frames time domain length.
In conjunction with second aspect of the present invention, in second aspect of the present invention second embodiment,
The acquisition module, specifically for receiving the mark for the radio frames time domain length sequence that the network sending node is sent Know, corresponding radio frames time domain length sequence is obtained from radio frames time domain length sequence sets according to the mark, it is described wireless Frame time domain length sequence sets are the set of the radio frames time domain length sequence, and the radio frames time domain length sequence includes multiple Element, the numerical value of at least one element and the numerical value of other elements are unequal, and corresponding one of the numerical value of each element is wireless The time domain length of frame.
In conjunction with second aspect of the present invention second embodiment, in second aspect of the present invention third embodiment, the network Receiving node further include: execution module；
The execution module, for receiving the generation side for the radio frames time domain sequences group that the network sending node is sent Formula converts the radio frames time domain sequences according to the generating mode of the radio frames time domain sequences group, obtains the nothing Line frame time domain sequences group, and determine that the time domain of described next or multiple radio frames is long according to the radio frames time domain sequences group Degree.
In conjunction with second aspect of the present invention, in the 4th embodiment of second aspect of the present invention, the network receiving node is also wrapped It includes: detection module；
The detection module determines next or more for the time domain length according to described next or multiple radio frames The time-domain position of control infomation detection is executed in a radio frames, and detects control in the time-domain position for executing control infomation detection Information processed.
In conjunction with second aspect of the present invention, in the 5th embodiment of second aspect of the present invention,
The detection module is also used to the time domain length according to described next or multiple radio frames, determines described next In a or multiple radio frames in each radio frames the last one subframe signal duration, and according to the signal continue when It is long, execute corresponding rate-matched.
Third aspect present invention provides a kind of method for transmitting signals of wireless network, comprising:
Network sending node determines the time domain length of next or multiple radio frames of current radio frames in unlicensed spectrum, The time domain length Length discrepancy of the time domain length of described next or multiple radio frames and the current radio frames；
The network sending node according to described next or multiple radio frames time domain length, configure it is described next or Multiple radio frames；
When by idle channel evaluate and test CCA detect idle channel when, the network sending node by configuration it is described under One or more radio frames are sent to network receiving node.
In conjunction with third aspect present invention, in second aspect of the present invention first embodiment, the network sending node is determined The time domain length of next or multiple radio frames of current radio frames includes: in unlicensed spectrum
The network sending node obtains the time domain length of current radio frames；
The network sending node determines that one or more time domains different from the time domain length of the current radio frames are long Degree, as the time domain length of described next or multiple radio frames, each radio frames in described next or multiple radio frames Time domain length is that the network sending node is given birth at random between most short radio frames time domain length and longest radio frames time domain length At.
In conjunction with third aspect present invention first embodiment, in third aspect present invention second embodiment, the network Sending node determines one or more time domain lengths different from the time domain length of the current radio frames, as described next Or include: after the time domain length of multiple radio frames
The information of the time domain length of described next or multiple radio frames is sent to the net by the network sending node Network receiving node.
In conjunction with third aspect present invention, in third aspect present invention third embodiment, the network sending node is determined The time domain length of next or multiple radio frames of current radio frames includes: in unlicensed spectrum
The network sending node chooses a radio frames time domain length sequence in radio frames time domain length sequence sets, root The time domain length of described next or multiple radio frames is determined according to the radio frames time domain length sequence, wherein the radio frames Time domain length sequence sets are the set of the radio frames time domain length sequence, and the radio frames time domain length sequence includes multiple members Element, the numerical value of at least one element and the numerical value of other elements are unequal, and the corresponding radio frames of numerical value of each element Time domain length.
In conjunction with third aspect present invention third embodiment, in the 4th embodiment of third aspect present invention, the network Sending node is gone back before configuring described next or multiple radio frames according to the time domain length of described next or multiple radio frames Include:
The network sending node obtains the mark of the radio frames time domain length sequence；
The mark is sent to the network receiving node by the network sending node.
In conjunction with third aspect present invention third embodiment, in the 5th embodiment of third aspect present invention, the network Sending node chooses a radio frames time domain length sequence in radio frames time domain length sequence sets, according to the radio frames time domain Length sequences determine before the time domain length of described next or multiple radio frames further include:
The network sending node generates radio frames time domain length sequence group according to the radio frames time domain length sequence；
The generating mode of the radio frames time domain length sequence group is sent to the network and connect by the network sending node Receive node.
In conjunction with the 5th embodiment of third aspect present invention, in third aspect present invention sixth embodiment, the network Sending node generates radio frames time domain length sequence group according to the radio frames time domain length sequence
The network sending node executes cyclic shift to the radio frames time domain length sequence, and it is long to generate radio frames time domain Degree series group.
In conjunction with the 5th embodiment of third aspect present invention, in the 7th embodiment of third aspect present invention, the network Sending node generates radio frames time domain length sequence group according to the radio frames time domain length sequence
The network sending node executes period expansion to the radio frames time domain length sequence, and it is long to generate radio frames time domain Degree series group.
Fourth aspect present invention provides a kind of method for transmitting signals of wireless network, comprising:
Network receiving node obtains the time domain length of next or multiple radio frames, described next or multiple radio frames The time domain length Length discrepancy of received current radio frames on time domain length and unlicensed spectrum；
The network receiving node receives network sending node according to the time domain length of described next or multiple radio frames The next or multiple radio frames sent.
In conjunction with fourth aspect present invention, in fourth aspect present invention first embodiment, the network receiving node is obtained The time domain length of next or multiple radio frames includes:
The network receiving node receive described next or multiple radio frames that the network sending node is sent when The information of length of field, the time domain length of each radio frames is that the network sending node exists in described next or multiple radio frames It is generated at random between most short radio frames time domain length and longest radio frames time domain length.
In conjunction with fourth aspect present invention, in fourth aspect present invention second embodiment, the network receiving node is obtained The time domain length of next or multiple radio frames includes:
The network receiving node receives the mark for the radio frames time domain length sequence that the network sending node is sent, root Corresponding radio frames time domain length sequence, the radio frames time domain are obtained from radio frames time domain length sequence sets according to the mark Length sequences collection is the set of the radio frames time domain length sequence, and the radio frames time domain length sequence includes multiple elements, The numerical value of at least one element and the numerical value of other elements are unequal, and the corresponding radio frames of numerical value of each element when Length of field.
In conjunction with fourth aspect present invention second embodiment, in fourth aspect present invention third embodiment, further includes:
The network receiving node receives the generating mode for the radio frames time domain sequences group that the network sending node is sent, The radio frames time domain sequences are converted according to the generating mode of the radio frames time domain sequences group, obtain the radio frames Time domain sequences group, and determine according to the radio frames time domain sequences group time domain length of described next or multiple radio frames.
In conjunction with fourth aspect present invention, in the 4th embodiment of fourth aspect present invention, the network receiving node is obtained Include: after the time domain length of next or multiple radio frames
The network receiving node according to the time domain lengths of described next or multiple radio frames, determine it is described next or The time-domain position of control infomation detection is executed in multiple radio frames, and in the time-domain position detection for executing control infomation detection Control information.
In conjunction with fourth aspect present invention, in the 5th embodiment of fourth aspect present invention, the network receiving node is obtained Include: after the time domain length of next or multiple radio frames
The network receiving node according to the time domain lengths of described next or multiple radio frames, determine it is described next or The signal duration of the last one subframe is held and according to the signal duration in each radio frames in multiple radio frames The corresponding rate-matched of row.
As can be seen from the above technical solutions, the embodiment of the present invention has the advantage that
In the embodiment of the present invention, network sending node determines next or multiple nothing of current radio frames in unlicensed spectrum The time domain length of line frame, network sending node configure next or multiple according to the time domain length of next or multiple radio frames Next or multiple radio frames of configuration are sent to network and receive section by radio frames when detecting idle channel by CCA Point after network receiving node gets the time domain length of next or multiple radio frames, receives under the transmission of network sending node The time domain length of one or more radio frames, next or multiple radio frames is different from the time domain length of current radio frames, can be with So that the region IDP that the CCA in the radio frames that nonsynchronous network sending node is sent has probability to snap in radio frames, is realized Nonsynchronous network sending node carries out resource simultaneously and seizes, reduce some sending node always busy channel and other send Node can not listen to always the probability of channel idle, so that the fairness of channel resource occupancy be better achieved, reduce reality The implementation complexity of border system.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of network sending node in one embodiment of the invention；
Fig. 2 is the structural schematic diagram of network sending node in another embodiment of the present invention；
Fig. 3 is the structural schematic diagram of network sending node in further embodiment of this invention；
Fig. 4 is the structural schematic diagram of network receiving node in one embodiment of the invention；
Fig. 5 is the structural schematic diagram of network receiving node in another embodiment of the present invention；
Fig. 6 is the structural schematic diagram of network receiving node in further embodiment of this invention；
Fig. 7 is the schematic diagram of the data transmission method of wireless network in one embodiment of the invention；
Fig. 8 is the schematic diagram of the data transmission method of wireless network in another embodiment of the present invention；
Fig. 9 is that eNB1 makes eNB2 seize the schematic diagram less than channel always after seizing channel in the embodiment of the present invention；
Figure 10 is the schematic diagram for the time domain length that eNB1 and eNB2 generates radio frames at random in the embodiment of the present invention；
Figure 11 be the embodiment of the present invention in eNB1 and eNB2 radio frames time domain length it is identical cause eNB1 seize less than The schematic diagram of channel；
Figure 12 is the time domain that eNB1 and eNB2 configures radio frames based on radio frames time domain length sequence in the embodiment of the present invention The schematic diagram of length；
Figure 13 is the channel that radio frames time domain length sequence executes eNB1 and eNB2 after cyclic shift in the embodiment of the present invention The schematic diagram of occupancy；
Figure 14 is the schematic diagram of the time-domain position of synchronization signal detection in subframe and radio frames in the embodiment of the present invention；
The schematic diagram for the time-domain position that Figure 15 detects for control channel in subframe in the embodiment of the present invention and radio frames；
Figure 16 is that signal continues the schematic diagram of holding time in the last one subframe of each radio frames in the embodiment of the present invention；
Figure 17 is a kind of structural schematic diagram of terminal device provided in an embodiment of the present invention.
Specific embodiment
The embodiment of the invention provides the data transmission method of wireless network and network nodes, configure for network node non- Authorize frequency spectrum on radio frames time domain length so that different network nodes can busy channel, to realize Internet resources The fairness of occupancy.
Referring to Fig. 1, a kind of one embodiment of network sending node includes: in the embodiment of the present invention
Determining module 101, for determining the time domain of next or multiple radio frames of current radio frames in unlicensed spectrum Length；
Configuration module 102, the time domain length of next or multiple radio frames for determining according to determining module 101, matches Set next or multiple radio frames；
Sending module 103, for when detecting idle channel by CCA, by configure next of configuration module 102 or Multiple radio frames are sent to network receiving node.
In the embodiment of the present invention, the time domain length of next or multiple radio frames and the time domain length of current radio frames are differed Long, the CCA in radio frames that nonsynchronous network sending node can be made to send has probability to snap to the area radio frames Zhong IDP Domain realizes nonsynchronous network sending node while carrying out resource and seize, reduce some sending node always busy channel and Other sending nodes can not listen to always the probability of channel idle, so that the fairness of channel resource occupancy is better achieved, Reduce the implementation complexity of real system.
Optionally, above-mentioned network sending node further include: obtain module 201；
Module 201 is obtained, for obtaining the time domain length of current radio frames；
Determining module 101, specifically for determining one or more time domains with current radio frames that are obtaining the acquisition of module 201 The different time domain length of length, the time domain length as next or multiple radio frames；
Sending module 103, the letter of the time domain length for the next or multiple radio frames for being also used to determine determining module 101 Breath is sent to network receiving node.
In the embodiment of the present invention, when determining module 101 determines next or multiple according to the time domain length of current radio frames The mode of length of field, so that scheme is more flexible.
Secondly, the information of the time domain length of next or multiple radio frames is sent to network by sending module 103 receives section Point, so that scheme is more perfect.
Optionally, network sending node further include: execution module 301；
Determining module 101, specifically for choosing a radio frames time domain length sequence in radio frames time domain length sequence sets Column, the time domain length of next or multiple radio frames is determined according to radio frames time domain length sequence；
Module 201 is obtained, is also used to obtain the mark of radio frames time domain length sequence；
Sending module 103, is also used to identify and is sent to the network receiving node；
Execution module 301, for generating radio frames time domain length sequence group according to radio frames time domain length sequence.
In the embodiment of the present invention, the selection of determining module 101 radio frames time domain length sequence determines next or multiple wireless The mode of the time domain length of frame, so that scheme is more flexible.
The identification notification network of radio frames time domain length sequence is received into section secondly, obtaining module 201 and sending module 103 Point, so that scheme implementation is relatively reliable.
Optionally, execution module 301 are specifically used for executing cyclic shift to radio frames time domain length sequence, generate wireless Frame time domain length sequence group；
Or,
Specifically for executing period expansion to radio frames time domain length sequence, radio frames time domain length sequence group is generated.
In the embodiment of the present invention, execution module 301 is extended to obtain radio frames time domain to radio frames time domain length sequence The mode of length sequences group increases the alternative of scheme.
Referring to Fig. 4, a kind of one embodiment of network receiving node includes: in the embodiment of the present invention
Module 401 is obtained, for obtaining the time domain length of next or multiple radio frames；
Receiving module 402 receives network sending node and sends for the time domain length according to next or multiple radio frames Next or multiple radio frames.
In the embodiment of the present invention, received current nothing on the time domain length and unlicensed spectrum of next or multiple radio frames The time domain length Length discrepancy of line frame, the CCA in radio frames that nonsynchronous network sending node can be made to send have probability pair The region IDP into radio frames together realizes nonsynchronous network sending node while carrying out resource and seize, reduces some reception Node always busy channel and other receiving nodes can not receive the probability of signal, thus be better achieved channel resource occupancy Fairness, reduce the implementation complexity of real system.
Optionally, module 401 is obtained, the next or multiple radio frames sent specifically for receiving network sending node The information of time domain length；
Or,
Specifically for receiving the mark for the radio frames time domain length sequence that network sending node is sent, according to mark from wireless Corresponding radio frames time domain length sequence is obtained in frame time domain length sequence sets.
In the embodiment of the present invention, the two ways that module 401 obtains the time domain length of next or multiple radio frames is obtained, So that scheme is more diversified.
Optionally, network receiving node further include: execution module 501；
Execution module 501, the generating mode of the radio frames time domain sequences group for receiving the transmission of network sending node, according to The generating mode of radio frames time domain sequences group converts radio frames time domain sequences, obtains radio frames time domain sequences group, and root The time domain length of next or multiple radio frames is determined according to radio frames time domain sequences group.
In the embodiment of the present invention, execution module 501 is extended to obtain radio frames time domain to radio frames time domain length sequence The mode of length sequences group increases the alternative of scheme
Optionally, network receiving node further include: detection module 601；
Detection module 601 determines one or more radio frames for the time domain length according to next or multiple radio frames The middle time-domain position for executing control infomation detection, and in the time-domain position detection control information for executing control infomation detection；
Or,
For the time domain length according to next or multiple radio frames, determine each wireless in next or multiple radio frames The signal duration of the last one subframe in frame, and according to signal duration, execute corresponding rate-matched.
In the embodiment of the present invention, detection module 601 executes corresponding according to the time domain length of next or multiple radio frames Operation, so that scheme is more specific.
Below with a specific implementation between each module in a kind of network sending node of the embodiment of the present invention Interactive process is described in detail:
The embodiment of the present invention can be applied to the wireless communication system in unlicensed spectrum, such as LAA-LTE system, wherein Network sending node can polymerize CA technology by carrier wave and polymerize multiple carrier waves, such as unauthorized carrier wave and authorization carry Wave, unauthorized carrier wave and unauthorized carrier wave, carrier wave allocation scenarios include: that 1, authorization frequency spectrum and unlicensed spectrum co-sited are disposed, i.e., Authorization frequency spectrum and unlicensed spectrum are polymerize by the same network sending node, which will authorize based on carrier wave setting Unauthorized carrier wave is set secondary member carrier SCC by member carrier PCC；2, frequency spectrum and the non-co-sited deployment of unlicensed spectrum are authorized, Such as authorization frequency spectrum is deployed in macro base station, unlicensed spectrum is deployed in low power nodes, including Microcell, picocell, family Base station, far end radio frequency head or relaying etc. pass through ideal or nonideal return link connection between macro base station and low power nodes； 3, unlicensed spectrum is independently deployed on network sending node, i.e. network sending node only uses unlicensed spectrum, without the use of Frequency spectrum is authorized, network sending node workable carrier wave in unlicensed spectrum can also be greater than one, separately either one Outside, consider that there is also the network sending nodes of other LAA-LTE operators and other commercial wireless communication systems in unlicensed spectrum System, such as Wifi system, coexistence scenario include: that the network sending node of different LAA-LTE operators coexists；LAA-LTE network Sending node (both including single LAA-LTE operator, also include multiple LAA-LTE operators) and other work are in unauthorized frequency The wireless communication system of spectrum coexists.Network sending node in the embodiment of the present invention can mainly work in unlicensed spectrum On base station or user equipment, wherein base station can for macro base station, Microcell, picocell, Home eNodeB, far end radio frequency head or Relaying etc.；User equipment can be the terminal devices such as mobile phone, the laptop that can access LTE system or tablet computer.
The embodiment of the present invention can be applied to the LAA-LTE system based on FBE, listen to-transmission process is wireless with one Frame is the period, and a wireless frame period includes Channel holding time (Channel Occupancy Time, COT) and free time (IDle Period, IDP), wherein Channel holding time is sending node continuous busy channel after CCA detects channel idle The time of information is sent, for time domain length in 1ms between 10ms, free time length is at least the 5% of Channel holding time, CCA detection is located at the tail portion of IDP；Sending node executes channel sense within the CCA time, and wherein the duration of CCA is not less than 20 μ s； When CCA detects that channel is occupied, then the not sending service in the Channel holding time of a next wireless frame period, instead Be channel idle, then send business in next Channel holding time；Sending node all terminates in COT in the case of two kinds Enter the IDP of the radio frames later, and is that the execution of next radio frames is listened in the CCA of the tail portion IDP.Here CCA executes energy Detection, i.e. detection CCA corresponds to the energy in whole section of bandwidth of current carrier in the time, if its normalized power is more than a fixation Thresholding, then it represents that channel is occupied, otherwise indicates channel idle, and currently transmitted node can be with busy channel.
It is illustrated so that network sending node is base station as an example below, but it is also suitable for user equipment.
For purposes of illustration only, the present embodiment is by taking the network sending node of the same channel of competition of the same area is all heavy duty as an example Be illustrated, just the network sending node of busy channel be known as occupy node, unoccupied channel and continuously carry out the net listened to Network sending node is known as interception node, and when sending node busy channel sends signal, interception node executes CCA energy measuring and obtains Power can be more than power threshold, that is, listen to that channel is occupied, when two or more networks using FBE intercept strategy are sent When node competes the channel of same unlicensed spectrum, if the time domain length of each radio frames of each sending node is (in other words Number of sub-frames included in radio frames) it is all identical, it is likely that there is an occupancy node and persistently sends information, and surrounding Interception node can not rob the problem of accounting for channel always, this is because in view of the characteristic that FBE is configured based on anchor-frame, for every A sending node, CCA and IDP can appear periodically in identical position, that is to say, that occupy the IDP of node and listen to What the relative position between the CCA of node was always fixed, as shown in figure 9, if occupying the IDP of node and the CCA of interception node Between offset it is excessive so that CCA does not snap to the region IDP, then in each radio frames, interception node is all seized less than letter Road, even if the CCA of interception node snaps to the region IDP for occupying node under certain specific sub-frame boundary offsets, so that under In one radio frames, former interception node, which becomes, occupies node, and original, which occupies node, becomes interception node, since CCA is to be located at IDP Tail portion, therefore the former CCA for occupying node is bound to snap to the region COT of former interception node, causes in the subsequent time Former sending node is seized always less than channel.
In order to achieve the purpose that make the relative position CCA and IDP to be randomized, a kind of method is exactly to make common competitive channel network One of node or all competition nodes in sending node all by determining module 101 determine it is next or it is multiple with work as The time domain length of the unequal radio frames of the time domain length of preceding radio frames, since domain scheduling granularity is usual when LTE system is the smallest It is as unit of subframe, therefore time domain length is presented as 1ms, i.e., the integral multiple of 1 subframe lengths, since IDP and CCA is in nothing The tail portion of line frame, therefore the time domain length difference meeting of continuous several radio frames is so that occupy the IDP of node and the CCA of interception node Relative position is no longer periodical appearance, and the characteristic of randomization is presented with the variation of the time domain length of radio frames, thus The region IDP that compared to fixed frame length configuration can have an opportunity that CCA is made to snap to occupancy node accounts for channel to rob, and such as schemes Shown in 10, it is assumed that eNB1 is identical as Figure 11 with respect to the frame boundary offset value of eNB2, and the value of the time domain length of current radio frames is " 3 ", the determining module 101 in eNB1 determine the time domain length of next or multiple radio frames, such as four nothings that eNB1 is determined The time domain length of line frame is that " 4,2,5,6 ", eNB2 determine the time domain length of next or multiple radio frames, such as in eNB2 really The time domain length for the radio frames that cover half block 101 determines is " 6,4,2,4 "；It can be seen that eNB1 can be in first wireless tail CCA detects channel idle, so that busy channel sends radio frames, it is occupied that eNB2 in the 2nd, 3 radio frames listens to channel, Channel idle is listened in the 4th radio frames, to resume channel, is all occupied by eNB2 compared to channel in Figure 11 Situation, the number that two eNB seize channel in Figure 10 be it is comparable, certainly, the phase for accounting for channel not only with CCA, IDP can be robbed Related to time-domain position and related with the time domain length of sending node IDP, the more long then position of the time domain length of IDP is random The CCA of change has bigger probability to snap to the region IDP for occupying node；But fixed frame length is configured, even if node When IDP is very big, interception node is seized always to be still bound to occur less than the case where channel, both can be in actual system Generate the time domain length for the radio frames for occupying node and interception node all at random, can also only make interception node generate at random and Occupying node still uses fixed frame length to configure, and interception node can be made to have certain chance by its CCA under both of these case The IDP for occupying node is snapped to, interception node only needs to determine the time domain of next or multiple radio frames according to CCA intercepted result Length, without changing frame length configuration by the occupancy node of the means such as internode collaboration notice configuration fixed frame length, because This is with wider applicability；Next or multiple nothing that sending module 103 is determined determining module 101 by control channel The information of the time domain length of line frame notifies network receiving node, alternatively, it is also possible to long not by next or multiple radio frames time domains The information of degree notifies network receiving node, and executes the synchronous letter of blind examination in the initial position of each subframe by network receiving node Road, pilot signal and control channel etc.；But if invention module 103 is by the information of next or multiple radio frames time domain lengths Notify network receiving node, network receiving node is upon receiving this information, it is only necessary in the start bit of each corresponding radio frames Execution blind Detecting is set, if the control information of network sending node is not detected, judges the network sending node current Unoccupied channel in radio-frame time is detected without each subframe, facilitates the detection of complex for reducing network receiving node Degree, the information of radio frames time domain length had both included the time domain length of radio frames, when also including that other can map to obtain radio frames The information of length of field, for example, in radio frames COT time domain length, the time domain length etc. of IDP, network receiving node knowing COT With the time domain length that radio frames can be calculated in the case where IDP ratio by the time domain length of COT or IDP.
When above-mentioned determining module 101 determines next or multiple radio frames unequal with current radio frames time domain lengths The method of length of field can obtain the preferable position CCA, IDP randomization characteristic, but sending module 103 is needed each wireless The information of the time domain length of frame all notifies network receiving node, brings biggish expense, and in order to reduce expense, one kind can be used Based on the method for radio frames time domain length sequence, i.e., for wireless communication system design one supported using FBE intercept strategy Radio frames time domain length sequence sets, the corresponding radio frames time domain length sequence of each sequence therein, radio frames time domain length Sequence includes multiple elements, and the numerical value of each element corresponds to the time domain length of a radio frames, the time domain length of radio frames (value of i.e. each element) is long in most short radio frames time domain length (such as FBE regulation define 1ms) and most short radio frames time domain It is generated at random between degree (such as FBE regulation define 10ms), the numerical value of each element indicates the subframe that a radio frames include Number, sequence can generate at random, also can use emulation or actual measurement to the time domain length of possible various radio frames combine into Row optimization obtains, as long as multiple elements in sequence have different values, can reach the CCA and occupancy for making interception node The changed effect in the relative position IDP of node, makes CCA have certain chance to snap to the region IDP, therefore can equally reach solution The problem of certainly interception node is seized always less than channel resource, it should be noted that the determination of determining module 101 is next or multiple In the method for the time domain length of the unequal radio frames of time domain length of current radio frames, determining any of determining module 101 It is all independent from each other between the time domain length of radio frames, and under the method based on radio frames time domain length sequence, sequence is pre- It is first generated, therefore the time domain length of each radio frames that configures of configuration module 102 is and sequence and previous wireless The time domain length of frame is relevant；As shown in figure 12, radio frames time domain length sequence is by taking 4 elements as an example, but practical each sequence In can configure element number include but be not limited only to 4, the determining module 101 of eNB1 is in radio frames time domain length sequence in Figure 12 Column concentrate selection sequence { 5,3,2,4 }, the determining module 101 of eNB2 selected in radio frames time domain length sequence sets sequence 2, 3,4,5 }, then under the frame boundary offset in Figure 12, eNB1 and eNB2, which had to rob within the period of a sequence, accounts for channel Chance under the frame boundary offset in Figure 11, can be such that two sending nodes are all seized by using the sequence of variable frame length The chance of channel, it is still a lesser value that the period that identical relative position occurs in CCA and IDP under the sequence, which is 14ms, Under the IDP configuration of certain specific frame boundaries or shorter, this shorter period assignment is still likely to occur one of net Network sending node seizes always the case where less than channel resource.First method is: if network sending node is last in sequence The CCA of one wireless tail, which still can not be robbed, accounts for channel, then the radio frames time domain length sequence that sending module 103 will be selected newly The identification notification network receiving node for the radio frames time domain length sequence concentrated is arranged, but this method signaling overheads is larger；Second Kind of method is: the sequence that determining module 101 selects element number more to expand the period, such as 5,3,2,4,8,10,7,1,6, 9}；The third method is: the radio frames time domain length sequence that execution module 301 selects determining module 101 executes cyclic shift Or period expansion generates radio frames time domain length sequence group, the time domain length of subsequent radio frames is according to radio frames time domain length sequence Radio frames time domain length sequence in column group is configured, such as by sequence { 5,3,2,4 } ring shift left one of eNB1 in Figure 12 Behind position available { 3,2,4,5 }, after sequence { 2,3,4,5 } ring shift left one of eNB1 available { 3,4,5,2 }, working as Cyclic shift is executed after presequence, it is hereby achieved that the longer sequence of a cycle, seizes channel money for eNB2 realization Source purpose, as shown in figure 13, eNB2 still can not seize channel in 4 radio frames of first sequence, but following Cyclic shift 4 radio frames in rob and account for channel；Although in a relatively short period of time and not up to fair busy channel resource, But achieve the effect that can be realized resource fairness in longer time granularity occupies by cyclic shift, if executing circulation After displacement, interception node still can not successfully seize channel, it is determined that module 101 can be from radio frames time domain length sequence sets A sequence is reselected, for determining the time domain length of next or multiple radio frames.
Although the method that the radio frames time domain length sequence that above-mentioned basis is selected generates radio frames time domain length sequence group CCA, IDP period for identical relative position occur are extended as prior art two, but compared to existing Technical solution two, the combination of the time domain length configuration of a variety of radio frames and cyclic shift considerably increase this in this method The length in period, so as to reach approximately and be randomized effect similar in the time domain length of radio frames, in order to according to radio frames Sequence in time domain length sequence obtains more diversified cyclic shift, thus be better achieved CCA, IDP time-domain position with Machine, execution module 301 can also there are many generate radio frames time domain length sequence group according to radio frames time domain length sequence Mode, such as period expansion or cyclic shift are executed, cyclic shift mode includes: ring shift left position, dextroposition and primary shifting Several etc., and network receiving node is semi-statically notified by RRC signaling, by taking { 5,3,2,4 } as an example, ring shift left one is obtained { 3,2,4,5 }, ring shift left two obtain { 2,4,5,3 }, and ring shift right one obtains { 4,5,3,2 }, different cyclic shifts It can achieve different randomization effects.
Determining module 101 determines the time domain length of next or multiple radio frames according to the time domain length of current radio frames Method and the method for determining next or multiple radio frames according to radio frames time domain length sequence can both make to occupy node and detect Node is listened all to select radio frames time domain length sequence to configure the time domain length of radio frames, the radio frames time domain length sequence of selection It can not also notify to occupy node (still configuring using anchor-frame time domain length), and only require interception node and select radio frames Time domain length sequence equally can achieve the purpose for being randomized the relative position CCA and IDP.
All-network sending node and network receiving node in communication system both know about radio frames time domain length sequence sets, Therefore sending module 103 is only needed using RRC signaling semi-statically by radio frames time domain length sequence in radio frames time domain length Identification notification in sequence sets gives network receiving node, and network receiving node is opened from N >=1 subframe for receiving RRC signaling Begin to execute synchronous detection according to the time domain length for receiving the radio frames provided in sequence；If current radio frames correspond to radio frames The last one element of current sequence in time domain length sequence sets, then network receiving node is moved in next radio frames according to circulation Sequence behind position executes synchronous detection；Sending module 103 can not also be by the mark or radio frames of radio frames time domain length sequence Time domain length sequence group generating mode notify network receiving node, and by network receiving node the initial position of each subframe into Row blind examination synchronizing channel, pilot signal and control channel etc., still, if sending module 103 is by radio frames time domain length sequence Mark or radio frames time domain length sequence group generating mode notify network receiving node, network receiving node receive the mark or After generating mode, it is only necessary to blind Detecting is executed in the initial position of each corresponding radio frames, if network, which is not detected, sends section The control information of point, then judge network sending node unoccupied channel within the time of current radio frames, without every height Frame detection facilitates the detection complexity for reducing network receiving node.
In addition, determining module 101 can randomly choose one in radio frames time domain length sequence sets in the embodiment of the present invention A radio frames time domain length sequence can also select specific radio frames time domain length sequence according to business demand, such as preferentially The grade lesser business of higher and packet length, can choose the lesser sequence of average time domain length, such as { 1,2,1,1 }, due to it The interval that CCA is listened to is shorter, therefore accounts for channel resource there is a greater chance that robbing；In addition, some business data packets are larger, and right Time delay there are certain requirements, and need all to have passed a high level data packet in a radio frames, it is therefore desirable to which average time domain is long Spend longer sequence, in addition in view of traditional fixed frame length configuration can be compatible with, can by fixed frame length, such as 10, 10,10,10 } as one of set sequence.
It should be noted that sending module 103 involved in above-described embodiment can be by base station or the hair of user equipment Emitter is realized, module 201, determining module 101, configuration module 102 and execution module 301 are obtained involved in above-described embodiment It can be realized by the processor in base station or user equipment.
Below with a specific implementation between each module in a kind of network receiving node of the embodiment of the present invention Interactive process is described in detail:
Network receiving node in the embodiment of the present invention is mainly can work base station or user in unlicensed spectrum Equipment, wherein base station can be macro base station, Microcell, picocell, Home eNodeB, far end radio frequency head or relaying etc.；User sets Standby can be the terminal devices such as mobile phone, the laptop that can access LTE system or tablet computer
It is illustrated so that network receiving node is user equipment as an example below, but it is also suitable for base station.
For purposes of illustration only, using base station as network sending node, when base station determines current radio frames in unlicensed spectrum The time domain length of next or multiple radio frames, and the information of the time domain length of next or multiple radio frames is sent to user When equipment, obtains module 401 and receive the information, to get the time domain length of next or multiple radio frames；Alternatively, working as base It stands and selects radio frames time domain length sequence from radio frames time domain length sequence sets, it is true according to the radio frames time domain length sequence The time domain length of one or more radio frames is fixed, and the mark of the radio frames time domain length sequence is sent to user equipment When, it obtains equipment 401 and receives the mark, when obtaining corresponding radio frames from radio frames time domain length sequence sets according to the mark Length of field sequence, the radio frames time domain length sequence include multiple elements, the numerical value of at least one element and the number of other elements It is worth unequal, and the time domain length of the corresponding radio frames of numerical value of each element, thus, get next or multiple nothings The time domain length of line frame, receiving module 402 receive base station and send after the time domain length for getting next or multiple radio frames Next or multiple radio frames.
When base station according to radio frames time domain length sequence generate radio frames time domain length sequence group, and to user equipment send When the generating mode of radio frames time domain length sequence group, execution module 501 receives the generating mode, according to the generating mode pair Radio frames time domain sequences are converted, and radio frames time domain sequences group identical with base station are obtained, according to the radio frames time domain sequences Group determines the time domain length of next or multiple radio frames.
After obtaining the time domain length that module 401 obtains next or multiple radio frames, detection module 601 may determine that next On the one hand the frame header position of a or multiple radio frames, the frame header position that detection module 601 obtains radio frames facilitate its judging part The time-domain position of sub-control information, such as synchronization signal and broadcast singal, as shown in figure 14, such as frequency division duplex (Frequency Division Duplexing, FDD) under mode, synchronization signal always occurs from the tail portion of each first time slot of radio frames, then User equipment is in the case where knowing the frame header position of radio frames, it is only necessary to go detection synchronization signal to the frame header position； , whereas if obtaining the time domain length that module 401 does not obtain each radio frames, then need detection module 601 each wireless Synchronization signal is all detected in the subframe of frame, leads to the increase of detection complexity.
After detection module 601 judges the frame header position of next or multiple radio frames, its test section sub-control can also be reduced Information processed, such as Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH) and pilot tone letter Number complexity, user needs to pilot signal, such as cell specific reference signal (Cell Specific Reference Signal, CRS) the smart synchronization of detection realization and Channel Detection are carried out, and the controls such as blind examination acquisition scheduling of resource are carried out to PDCCH and are believed Breath, as shown in figure 15, since user equipment is not aware that the whether successful busy channel in base station receives some radio frames, it is therefore desirable to Judged by the detection of pilot signal, control channel, if detection module 601 detects both signals, can determine base Successfully busy channel of standing receives current radio frames, can execute the reception of subsequent data, otherwise not need to receive the radio frames Upper subsequent data only need if detection module 601 can obtain the frame header position of radio frames the of each radio frames Pilot signal and PDCCH are detected in one subframe, if detection module 601 can't detect these signals, judged The subsequent subframe of current radio frames is not also occupied by base station, does not need to execute detection to the subsequent subframe of current radio frames；Instead It, if obtaining the time domain length that module 401 does not know each radio frames, detection module 601 is needed to each subframe It executes pilot signal and PDCCH is detected, judge whether base station occupies the subframe, the detection for increasing user equipment in this way is multiple Miscellaneous degree.
In addition, each nothing can also be realized by obtaining the time domain length of next or multiple radio frames by obtaining module 401 The rate-matched of the last one subframe of line frame has to enter into IDP due to FBE after COT, and IDP time span is at least The 5% of COT time, on the other hand wireless frame length is usually integer subframe, therefore when wireless frame length is M subframe, COT duration is not usually integer subframe, but M-1 subframe adds several OFDM symbols, as shown in figure 16, for 5%, no Under the time domain length of same radio frames, once transmit what signal in longest COT and the last one corresponding subframe occupied OFDM symbol number is as shown in table 1, wherein COT the limited time is transmitted in longest to be grown when the time domain length of radio frames is 11ms The limitation for spending 10ms, can only transmit 10 subframes, and using the free time of last 1 subframe as IDP, the i.e. time domain length of radio frames IDP is the 10% of COT when for 11ms.Assuming that the ratio of IDP and COT can semi-statically notify to set to user by broadcast signaling When standby, base station is required in each radio frames according to the proportional arrangement signal duration, if obtaining module 401 can know often The time domain length of a radio frames can then calculate (for example, according to mapping in following table) and obtain the last one subframe of the radio frames The number for the OFDM symbol that upper signal occupies, to realize rate-matched, i.e., according to the number solution yardage of corresponding OFDM symbol According to；If user equipment on the contrary does not know the time domain length of each radio frames, the last one subframe is accorded with still according to 14 OFDM It number goes to decode, then will lead to the last one subframe reception failure.
Table 1
It, can connecing by base station or user equipment it should be noted that receiving module 402 involved in above-described embodiment Device is received to realize, acquisition module 401, execution module 501 and detection module 601 involved in above-described embodiment can by base station or Processor in user equipment is realized.
Referring to Fig. 7, a kind of one embodiment of the data transmission method of wireless network includes: in the embodiment of the present invention
701, network sending node determines the time domain of next or multiple radio frames of current radio frames in unlicensed spectrum Length；
In this step, the time domain length of next or multiple radio frames and the time domain length Length discrepancy of current radio frames.
702, network sending node configures next or multiple wireless according to the time domain length of next or multiple radio frames Frame；
703, when detecting idle channel by CCA, network sending node is by described next or multiple nothing of configuration Line frame is sent to network receiving node.
In some embodiments of the present invention, network sending node determine the next of current radio frames in unlicensed spectrum or The time domain length of multiple radio frames includes:
Network sending node obtains the time domain length of current radio frames；
Network sending node determines one or more time domain lengths different from the time domain length of current radio frames, as under The time domain length of one or more radio frames, the time domain length of each radio frames is that network is sent in next or multiple radio frames Node generates at random between most short radio frames time domain length and longest radio frames time domain length.
In some embodiments of the present invention, network sending node determines one or more time domain lengths with current radio frames Different time domain lengths, the time domain length as next or multiple radio frames include: later
The information of the time domain length of next or multiple radio frames is sent to network receiving node by network sending node.
In some embodiments of the present invention, network sending node determine the next of current radio frames in unlicensed spectrum or The time domain length of multiple radio frames includes:
Network sending node chooses a radio frames time domain length sequence in radio frames time domain length sequence sets, according to nothing Line frame time domain length sequence determines the time domain length of next or multiple radio frames, wherein radio frames time domain length sequence sets are The set of radio frames time domain length sequence, radio frames time domain length sequence include multiple elements, the numerical value of at least one element with The numerical value of other elements is unequal, and the time domain length of the corresponding radio frames of numerical value of each element.
In some embodiments of the present invention, network sending node is matched according to the time domain length of next or multiple radio frames Can also include: before setting next or multiple radio frames
Network sending node obtains the mark of the radio frames time domain length sequence；
Mark is sent to network receiving node by network sending node.
In some embodiments of the present invention, one in network sending node selection radio frames time domain length sequence sets is wireless Frame time domain length sequence may be used also before determining the time domain length of next or multiple radio frames according to radio frames time domain length sequence To include:
Network sending node generates radio frames time domain length sequence group according to radio frames time domain length sequence；
The generating mode of radio frames time domain length sequence group is sent to network receiving node by network sending node.
In some embodiments of the present invention, network sending node generates radio frames time domain according to radio frames time domain length sequence Length sequences group includes:
Network sending node executes cyclic shift to radio frames time domain length sequence, generates radio frames time domain length sequence Group.
In some embodiments of the present invention, network sending node generates radio frames time domain according to radio frames time domain length sequence Length sequences group includes:
Network sending node executes period expansion to radio frames time domain length sequence, generates radio frames time domain length sequence Group.
In the embodiment of the present invention, the time domain length of the time domain lengths of next or multiple radio frames and current radio frames is not Together, the CCA in radio frames that nonsynchronous network sending node can be made to send has probability to snap to the area radio frames Zhong IDP Domain realizes nonsynchronous network sending node while carrying out resource and seize, reduce some sending node always busy channel and Other sending nodes can not listen to always the probability of channel idle, so that the fairness of channel resource occupancy is better achieved, Reduce the implementation complexity of real system.
It should be noted that network sending node can be determined according to the time domain length of the current radio frames of acquisition it is unauthorized The time domain length of next or multiple radio frames on frequency spectrum, can also be by choosing one in radio frames time domain length sequence sets A radio frames time domain length sequence determines the time domain length of next or multiple radio frames according to radio frames time domain length sequence, Network sending node can also determine the time domain length of next radio frames by other means, herein without limitation.
It should be noted that network sending node generates radio frames time domain length sequence according to radio frames time domain length sequence The mode of group can be cyclic shift, for example, ring shift left one or ring shift right one etc.；It can also be period expansion, example Such as, a period expansion will be carried out comprising the radio frames time domain length sequence { 1,2,3 } of three elements, it is long generates radio frames time domain Degree series group { 1,2,3,1,2,3 }, when it is implemented, the mode for generating radio frames time domain length sequence group can also be its other party Formula, herein without limitation.
Referring to Fig. 8, a kind of one embodiment of the data transmission method of wireless network includes: in the embodiment of the present invention
801, network receiving node obtains the time domain length of next or multiple radio frames；
In this step, received current radio frames on the time domain length and unlicensed spectrum of next or multiple radio frames Time domain length Length discrepancy.
802, network receiving node receives network sending node and sends according to the time domain length of next or multiple radio frames Next or multiple radio frames.
In some embodiments of the present invention, network receiving node obtains the time domain length packet of next or multiple radio frames It includes:
Network receiving node receives the information of the time domain length for next or multiple radio frames that network sending node is sent, In next or multiple radio frames the time domain length of each radio frames be network sending node in most short radio frames time domain length and It is generated at random between longest radio frames time domain length.
In some embodiments of the present invention, network receiving node obtains the time domain length packet of next or multiple radio frames It includes:
Network receiving node receive network sending node send radio frames time domain length sequence mark, according to mark from Corresponding radio frames time domain length sequence is obtained in radio frames time domain length sequence sets, radio frames time domain length sequence sets are wireless The set of frame time domain length sequence, radio frames time domain length sequence include multiple elements, the numerical value of at least one element and other The numerical value of element is unequal, and the time domain length of the corresponding radio frames of numerical value of each element.
In some embodiments of the present invention, can also include:
Network receiving node receives the generating mode for the radio frames time domain sequences group that network sending node is sent, according to wireless The generating mode of frame time domain sequences group converts radio frames time domain sequences, obtains radio frames time domain sequences group, and according to nothing Line frame time domain sequences group determines the time domain length of next or multiple radio frames.
In some embodiments of the present invention, network receiving node is obtained after the time domain length of next or multiple radio frames Include:
Network receiving node determines in next or multiple radio frames according to the time domain length of next or multiple radio frames The time-domain position of control infomation detection is executed, and in the time-domain position detection control signal for executing control signal detection.
In some embodiments of the present invention, network receiving node is obtained after the time domain length of next or multiple radio frames Include:
Network receiving node determines in next or multiple radio frames according to the time domain length of next or multiple radio frames The signal duration of the last one subframe in each radio frames, and according to signal duration, execute corresponding rate-matched.
In the embodiment of the present invention, received current nothing on the time domain length and unlicensed spectrum of next or multiple radio frames The time domain length Length discrepancy of line frame, the CCA in radio frames that nonsynchronous network sending node can be made to send have probability pair The region IDP into radio frames together realizes nonsynchronous network sending node while carrying out resource and seize, reduces some reception Node always busy channel and other receiving nodes can not receive the probability of signal, thus be better achieved channel resource occupancy Fairness, reduce the implementation complexity of real system.
For ease of understanding, it is carried out below with a kind of data transmission method of the concrete application scene to wireless network detailed Description, specific:
The embodiment of the present invention can be applied to the wireless communication system in unlicensed spectrum, such as LAA-LTE system, wherein Network sending node can polymerize CA technology by carrier wave and polymerize multiple carrier waves, such as unauthorized carrier wave and authorization carry Wave, unauthorized carrier wave and unauthorized carrier wave, carrier wave allocation scenarios include: that 1, authorization frequency spectrum and unlicensed spectrum co-sited are disposed, i.e., Authorization frequency spectrum and unlicensed spectrum are polymerize by the same network sending node, which will authorize based on carrier wave setting Unauthorized carrier wave is set secondary member carrier SCC by member carrier PCC；2, frequency spectrum and the non-co-sited deployment of unlicensed spectrum are authorized, Such as authorization frequency spectrum is deployed in macro base station, unlicensed spectrum is deployed in low power nodes, including Microcell, picocell, family Base station, far end radio frequency head or relaying etc. pass through ideal or nonideal return link connection between macro base station and low power nodes； 3, unlicensed spectrum is independently deployed on network sending node, i.e. network sending node only uses unlicensed spectrum, without the use of Frequency spectrum is authorized, network sending node workable carrier wave in unlicensed spectrum can also be greater than one, separately either one Outside, consider that there is also the network sending nodes of other LAA-LTE operators and other commercial wireless communication systems in unlicensed spectrum System, such as Wifi system, coexistence scenario include: that the network sending node of different LAA-LTE operators coexists；LAA-LTE network Sending node (both including single LAA-LTE operator, also include multiple LAA-LTE operators) and other work are in unauthorized frequency The wireless communication system of spectrum coexists.Network sending node in the embodiment of the present invention can mainly work in unlicensed spectrum On base station or user equipment, wherein base station can for macro base station, Microcell, picocell, Home eNodeB, far end radio frequency head or Relaying etc.；User equipment can be the terminal devices such as mobile phone, the laptop that can access LTE system, tablet computer.
The embodiment of the present invention can be applied to the LAA-LTE system based on FBE, listen to-transmission process is wireless with one Frame is the period, and a wireless frame period includes COT and IDP, and wherein Channel holding time is that sending node in CCA detects channel Continuous busy channel sends the time of information after free time, and time domain length is believed in 1ms between 10ms, free time length is at least 5%, the CCA detection of road holding time is located at the tail portion of IDP；Sending node executes channel sense within the CCA time, wherein CCA Duration be not less than 20 μ s；When CCA detects that channel is occupied, then in the channel occupancy of a next wireless frame period Not sending service in time, on the contrary it is channel idle, then business is sent in next Channel holding time；Two kinds of situations issue The IDP for sending node to enter the radio frames all after COT terminates, and be that the execution of next radio frames is detectd in the CCA of the tail portion IDP It listens.Here CCA executes energy measuring, i.e. detection CCA corresponds to the energy in whole section of bandwidth of current carrier in the time, if its normalizing Changing power is more than a fixed threshold, then it represents that channel is occupied, otherwise indicates channel idle, and currently transmitted node can occupy Channel.
It is illustrated so that network sending node is base station as an example below, but it is also suitable for user equipment.
For purposes of illustration only, the present embodiment is by taking the network sending node of the same channel of competition of the same area is all heavy duty as an example Be illustrated, just the network sending node of busy channel be known as occupy node, unoccupied channel and continuously carry out the net listened to Network sending node is known as interception node, and when sending node busy channel sends signal, interception node executes CCA energy measuring and obtains Power can be more than power threshold, that is, listen to that channel is occupied, when two or more networks using FBE intercept strategy are sent When node competes the channel of same unlicensed spectrum, if the time domain length of each radio frames of each sending node is (in other words Number of sub-frames included in radio frames) it is all identical, it is likely that there is an occupancy node and persistently sends information, and surrounding Interception node can not rob the problem of accounting for channel always, this is because in view of the characteristic that FBE is configured based on anchor-frame, for every A sending node, CCA and IDP can appear periodically in identical position, that is to say, that occupy the IDP of node and listen to What the relative position between the CCA of node was always fixed, as shown in figure 9, if occupying the IDP of node and the CCA of interception node Between offset it is excessive so that CCA does not snap to the region IDP, then in each radio frames, interception node is all seized less than letter Road, even if the CCA of interception node snaps to the region IDP for occupying node under certain specific sub-frame boundary offsets, so that under In one radio frames, former interception node, which becomes, occupies node, and original, which occupies node, becomes interception node, since CCA is to be located at IDP Tail portion, therefore the former CCA for occupying node is bound to snap to the region COT of former interception node, causes in the subsequent time Former sending node is seized always less than channel.
In order to achieve the purpose that make the relative position CCA and IDP to be randomized, a kind of method is exactly to make common competitive channel network One of node or all competition nodes in sending node all determine next or multiple and current radio frames time domains The time domain length of the unequal radio frames of length, due to when LTE system is the smallest domain scheduling granularity be usually as unit of subframe, Therefore time domain length is presented as 1ms, i.e., the integral multiple of 1 subframe lengths, since IDP and CCA is in the tail portion of radio frames, The time domain length difference meeting of continuous several radio frames is so that the IDP of occupancy node and the relative position CCA of interception node are no longer Periodically occur, and the characteristic of randomization is presented with the variation of the time domain length of radio frames, thus compared to fixed frame length The region IDP that degree configuration can have an opportunity that CCA is made to snap to occupancy node accounts for channel to rob, as shown in Figure 10, it is assumed that ENB1 is identical as Figure 11 with respect to the frame boundary offset value of eNB2, and the value of the time domain length of current radio frames is " 3 ", under eNB1 is determined The time domain length of one or more radio frames, for example, eNB1 determine four radio frames time domain length be " 4,2,5,6 ", eNB2 Determine the time domain length of next or multiple radio frames, for example, the time domain length of four radio frames that eNB2 is determined be " 6,4, 2,4"；It can be seen that eNB1 can detect channel idle in the CCA of first wireless tail, so that busy channel sends information, It is occupied that eNB2 in the 2nd, 3 radio frames listens to channel, channel idle is listened in the 4th radio frames, to resume Channel, the case where all occupancy by eNB2 compared to channel in Figure 11, the number that two eNB seize channel in Figure 10 is suitable , certainly, can rob and account for channel not only opposite time-domain position is related with CCA, IDP's, but also with sending node IDP when Length of field is related, and the time domain length of IDP the long, and the CCA of position randomization has bigger probability to snap to the IDP for occupying node Region；But fixed frame length is configured, even if the IDP of node is very big, interception node seizes always the feelings less than channel Condition is still bound to occur, and in actual system, can both make the time domain length for occupying the radio frames of node and interception node It is all random to generate, only interception node can also be made to generate at random and occupy node and fixed frame length is still used to configure, both In the case of interception node can be made to have certain chance that its CCA is snapped to the IDP for occupying node, and only make interception node Random generate and under occupying node still by the way of fixed frame length configuration, interception node only needs to listen to knot according to CCA Fruit determines the time domain length of next or multiple radio frames, without passing through the means such as internode collaboration notice configuration anchor-frame The occupancy node of length changes frame length configuration, therefore has wider applicability；Network sending node (eNB1 and eNB2) is logical It crosses control channel and the information of the time domain length of determining next or multiple radio frames is notified into network receiving node, in addition, The information of next or multiple radio frames time domain lengths can not be notified into network receiving node, and by network receiving node every The initial position of a subframe executes blind examination synchronizing channel, pilot signal and control channel etc.；But if network sending node will under The information of one or more radio frames time domain lengths notifies network receiving node, network receiving node upon receiving this information, It only needs to execute blind Detecting in the initial position of each corresponding radio frames, if the control letter of network sending node is not detected Breath, then judge network sending node unoccupied channel in current radio-frame time, detects, has without each subframe Helping reduce the detection complexity of network receiving node, the information of radio frames time domain length had both included the time domain length of radio frames, Also include other can map to obtain the information of radio frames time domain length, such as in radio frames COT time domain length, IDP when Length of field etc., network receiving node can be calculated in the case where knowing COT and IDP ratio by the time domain length of COT or IDP Obtain the time domain length of radio frames.
Above-mentioned determination is next or multiple time domain lengths with the current radio frames unequal radio frames of time domain length Method can obtain the preferable position CCA, IDP randomization characteristic, but need the information of the time domain length each radio frames It all notifies network receiving node, brings biggish expense, in order to reduce expense, can be used a kind of based on radio frames time domain length The method of sequence, i.e., for the one radio frames time domain length sequence of wireless communication system design supported using FBE intercept strategy Collection, the corresponding radio frames time domain length sequence of each sequence therein, radio frames time domain length sequence includes multiple elements, and And one each element the corresponding radio frames of numerical value time domain length, the time domain length (value of i.e. each element) of radio frames exists Most short radio frames time domain length (such as FBE regulation define 1ms) and longest radio frames time domain length (such as the definition of FBE regulation 10ms) between generate at random, the numerical value of each element indicates that the number of subframes that a radio frames include, sequence can give birth at random At also can use emulation or actual measurement and optimize to obtain to possible various frame lengths combination, as long as multiple members in sequence Element has different values, can reach the CCA for making interception node and occupy the changed effect in the relative position IDP of node Fruit makes CCA have certain chance to snap to the region IDP, therefore can equally reach solution interception node and seize always less than channel money The problem of source, it should be noted that network sending node determines next or multiple time domain lengths with current radio frames not phase Deng radio frames time domain length method in, network sending node determine any radio frames time domain length between be all phase Mutually independent, and under the method based on radio frames time domain length sequence, sequence is pre-generated good, therefore network sending node The time domain length of each radio frames of configuration is relevant to sequence and previous wireless frame length；As shown in figure 12, nothing Line frame time domain length sequence is by taking 4 elements as an example, but the element number that can configure in practical each sequence includes but is not limited only to 4 A, eNB1 selects sequence { 5,3,2,4 } in radio frames time domain length sequence sets in Figure 12, and eNB2 selects sequence in arrangement set It arranges { 2,3,4,5 }, then under the frame boundary offset in Figure 12, eNB1 and eNB2 are robbed within the period of a sequence and accounted for letter The chance in road under the frame boundary offset in Figure 11, can be such that two sending nodes all obtain by using the sequence of variable frame length The chance of channel is seized, it is still one lesser that the period that identical relative position occurs in CCA and IDP under the sequence, which is 14ms, Value, under the IDP configuration of certain specific frame boundaries or shorter, this shorter period assignment is still likely to occur wherein one The case where a network sending node is seized always less than channel resource, first method is: if network sending node is in sequence The CCA for tail that the last one is wireless, which still can not be robbed, accounts for channel, then will be in the radio frames time domain length sequence sets newly selected Radio frames time domain length sequence identification notification network receiving node, but this method signaling overheads is larger；Second method Be: the sequence that network sending node selects element number more is to expand period, such as { 5,3,2,4,8,10,7,1,6,9 }；The Three kinds of methods are: the radio frames time domain length sequence selected is executed cyclic shift to network sending node or period expansion generates nothing Line frame time domain length sequence group, when the time domain lengths of subsequent radio frames is according to radio frames in radio frames time domain length sequence group Length of field sequence is configured, for example, by it is available after sequence { 5,3,2,4 } ring shift left one of eNB1 in Figure 12 3,2, 4,5 }, behind sequence { 2,3,4,5 } of eNB1 ring shift left one available { 3,4,5,2 }, executed after current sequence Cyclic shift, it is hereby achieved that the longer sequence of a cycle, seizes channel resource purpose for eNB2 realization, such as Figure 13 institute Showing, eNB2 still can not seize channel in 4 radio frames of first sequence, but at 4 of next cyclic shift It is robbed in radio frames and accounts for channel；Although in a relatively short period of time and being not up to fair busy channel resource, moved by circulation Position achievees the effect that can be realized resource fairness occupancy in longer time granularity, if listening to section after executing cyclic shift Point still can not successfully seize channel, then a sequence can be reselected from radio frames time domain length sequence sets, for true Fix the time domain length of one or more radio frames.
Although the method that the radio frames time domain length sequence that above-mentioned basis is selected generates radio frames time domain length sequence group CCA, IDP period for identical relative position occur are extended as prior art two, but compared to existing Technical solution two, the combination of the time domain length configuration of a variety of radio frames and cyclic shift considerably increase this in this method The length in period, so as to reach approximately and be randomized effect similar in the time domain length of radio frames, in order to according to radio frames Radio frames time domain length sequence in time domain length sequence sets obtains more diversified radio frames time domain length sequence group, thus with The randomization of CCA, IDP time-domain position is better achieved, network sending node can also there are many according to radio frames time domain length sequence The mode of column-generation radio frames time domain length sequence group, such as execute period expansion or cyclic shift, cyclic shift mode and include: It ring shift left position, dextroposition and once moves several etc., and network receiving node is semi-statically notified by RRC signaling, in case 5, 3,2,4 } for, ring shift left one is obtained { 3,2,4,5 }, and ring shift left two obtain { 2,4,5,3 }, ring shift right one To { 4,5,3,2 }, different cyclic shifts can achieve different randomization effects.
Network sending node determines the time domain length of next or multiple radio frames according to the time domain length of current radio frames Method and method that next or multiple radio frames are determined according to radio frames time domain length sequence, can both make to occupy node and Interception node selects radio frames time domain length sequence all to configure the time domain length of radio frames, the radio frames time domain length sequence of selection Column can not also notify to occupy node (still configuring using anchor-frame time domain length), and only require that interception node selection is wireless Frame time domain length sequence equally can achieve the purpose for being randomized the relative position CCA and IDP.
All-network sending node and network receiving node in communication system both know about radio frames time domain length sequence sets It closes, therefore network sending node is only needed using RRC signaling semi-statically by radio frames time domain length sequence in radio frames time domain The identification notification that length is concentrated gives network receiving node, and network receiving node is opened from N >=1 subframe for receiving RRC signaling Begin to execute synchronous detection according to the time domain length for receiving the radio frames provided in sequence；If current radio frames correspond to radio frames The last one element of current sequence in time domain length sequence sets, then network receiving node is moved in next radio frames according to circulation Sequence behind position executes synchronous detection；Network sending node can not also be by the mark or radio frames of radio frames time domain length sequence Time domain length sequence group generating mode notify network receiving node, and by network receiving node the initial position of each subframe into Row blind examination synchronizing channel, pilot signal and control channel etc., still, if network sending node is by radio frames time domain length sequence Mark or radio frames time domain length sequence group generating mode notify network receiving node, network receiving node receive the mark or After generating mode, it is only necessary to blind Detecting is executed in the initial position of each corresponding radio frames, if network, which is not detected, sends section The control information of point, then judge network sending node unoccupied channel within the time of current radio frames, without every height Frame detection facilitates the detection complexity for reducing network receiving node.
In addition, network sending node can randomly choose in radio frames time domain length sequence sets in the embodiment of the present invention One radio frames time domain length sequence can also select specific radio frames time domain length sequence according to business demand, such as excellent First grade is higher and the lesser business of packet length, can choose the lesser sequence of average time domain length, such as { 1,2,1,1 }, due to The interval that its CCA is listened to is shorter, therefore accounts for channel resource there is a greater chance that robbing；In addition, some business data packets are larger, and Time delay there are certain requirements, need all to have passed a high level data packet in a radio frames, it is therefore desirable to average time domain The longer sequence of length, in addition in view of traditional fixed frame length configuration can be compatible with, can by fixed frame length, such as { 10,10,10,10 } as one of set sequence.
For ease of understanding, it is carried out below with a kind of data transmission method of the concrete application scene to wireless network detailed Description, specific:
Network receiving node in the embodiment of the present invention is mainly can work base station or user in unlicensed spectrum Equipment, wherein base station can be macro base station, Microcell, picocell, Home eNodeB, far end radio frequency head or relaying etc.；User sets Standby can be the terminal devices such as mobile phone, the laptop that can access LTE system or tablet computer
It is illustrated so that network receiving node is user equipment as an example below, but it is also suitable for base station.
For purposes of illustration only, using base station as network sending node, when base station determines current radio frames in unlicensed spectrum The time domain length of next or multiple radio frames, and the information of the time domain length of next or multiple radio frames is sent to user When equipment, user equipment receives the information, to get the time domain length of next or multiple radio frames；Alternatively, working as base station Radio frames time domain length sequence is selected from radio frames time domain length sequence sets, is determined according to the radio frames time domain length sequence The time domain length of next or multiple radio frames, and when the mark of the radio frames time domain length sequence is sent to user equipment, User equipment receives the mark, and corresponding radio frames time domain length is obtained from radio frames time domain length sequence sets according to the mark Sequence, the radio frames time domain length sequence include multiple elements, the numerical value of the numerical value of at least one element and other elements not phase Deng, and the time domain length of the corresponding radio frames of numerical value of each element, thus, get next or multiple radio frames Time domain length, user equipment after the time domain length of the next or multiple radio frames obtained, receive base station send it is next or Multiple radio frames.
When base station according to radio frames time domain length sequence generate radio frames time domain length sequence group, and to user equipment send When the generating mode of radio frames time domain length sequence group, user equipment receives the generating mode, according to the generating mode to wireless Frame time domain sequences are converted, and radio frames time domain sequences group identical with base station is obtained, true according to the radio frames time domain sequences group Fix the time domain length of one or more radio frames.
After user equipment obtains the time domain length of next or multiple radio frames, it can be determined that next or multiple radio frames Frame header position, user equipment obtain radio frames frame header position on the one hand facilitate its judgment part control information time domain position It sets, such as synchronization signal and broadcast singal, as shown in figure 14, such as frequency division duplex (Frequency Division Duplexing, FDD) under mode, synchronization signal always occurs from the tail portion of each first time slot of radio frames, then user equipment In the case where knowing the frame header position of radio frames, it is only necessary to go detection synchronization signal to the frame header position；, whereas if User equipment does not obtain the time domain length of each radio frames, then needs to detect synchronous letter in the subframe of each radio frames Number, lead to the increase of detection complexity.
After user equipment judges the frame header position of next or multiple radio frames, its detection part control letter can also be reduced Breath, such as Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH) and pilot signal Complexity, user need to pilot signal, such as cell specific reference signal (Cell Specific Reference Signal, CRS) the smart synchronization of detection realization and Channel Detection are carried out, and the controls such as blind examination acquisition scheduling of resource are carried out to PDCCH and are believed Breath, as shown in figure 15, since user equipment is not aware that the whether successful busy channel in base station receives some radio frames, it is therefore desirable to Judged by the detection of pilot signal, control channel, if user equipment detects both signals, can determine base station at Function busy channel receives current radio frames, can execute the reception of subsequent data, otherwise does not need after receiving in the radio frames Continuous data.If user equipment can obtain the frame header position of radio frames, first son in each radio frames is only needed Pilot signal and PDCCH are detected on frame, if can't detect these signals, judge the subsequent child of current radio frames Frame is not also occupied by base station, does not need to execute detection to the subsequent subframe of current radio frames；, whereas if user equipment does not have Know the time domain length of each radio frames, then needs to be carried out pilot signal to each subframe and PDCCH is detected, judge base It stands and whether occupies the subframe, increase the detection complexity of user equipment in this way.
In addition, user equipment can also realize each radio frames by obtaining the time domain length of next or multiple radio frames The rate-matched of the last one subframe has to enter into IDP due to FBE after COT, and when IDP time span is at least COT Between 5%, on the other hand wireless frame length is usually integer subframe, therefore when wireless frame length is M subframe, when COT Long is not usually integer subframe, but M-1 subframe adds several OFDM symbols, as shown in figure 16, different for 5% Under the time domain length of radio frames, the OFDM symbol that signal occupies in longest COT and the last one corresponding subframe is once transmitted Number mesh is as shown in table 1, wherein COT the limited time is in longest conveying length 10ms when the time domain length of radio frames is 11ms Limitation, 10 subframes can only be transmitted, and using the free time of last 1 subframe as IDP, i.e. the time domain length of radio frames is 11ms When IDP be COT 10%.Assuming that when the ratio of IDP and COT can semi-statically be notified by broadcast signaling to user equipment, Base station is required in each radio frames according to the proportional arrangement signal duration, if user equipment can know each radio frames Time domain length, then can calculate (for example, according to mapping in following table) and obtain signal in the last one subframe of the radio frames and account for The number of OFDM symbol, to realize rate-matched, i.e., according to the number decoding data of corresponding OFDM symbol；If otherwise User equipment does not know the time domain length of each radio frames, the last one subframe goes to decode still according to 14 OFDM symbols, It then will lead to the last one subframe reception failure.
It should be noted that in the above embodiment of the present invention, when network sending node is base station, network receiving node It can be user equipment；When network sending node is user equipment, network receiving node can be base station or another user Equipment.
The embodiment of the invention also provides a kind of terminal devices, as shown in figure 17, for ease of description, illustrate only and this The relevant part of inventive embodiments, it is disclosed by specific technical details, please refer to present invention method part.The terminal can Think including mobile phone, tablet computer, PDA (Personal Digital Assistant, personal digital assistant), POS (Point Of Sales, point-of-sale terminal), any terminal device such as vehicle-mounted computer, taking the terminal as an example:
Figure 17 shows the block diagram of the part-structure of mobile phone relevant to terminal provided in an embodiment of the present invention.With reference to figure 17, mobile phone includes: radio frequency (Radio Frequency, RF) circuit 1710, memory 1720, input unit 1730, display unit 1740, sensor 1750, voicefrequency circuit 1760, Wireless Fidelity (wireless fidelity, WiFi) module 1770, processor The components such as 1780 and power supply 1790.It will be understood by those skilled in the art that handset structure shown in Figure 17 is not constituted pair The restriction of mobile phone may include perhaps combining certain components or different component cloth than illustrating more or fewer components It sets.
It is specifically introduced below with reference to each component parts of the Figure 17 to mobile phone:
RF circuit 1710 can be used for receiving and sending messages or communication process in, signal sends and receivees, particularly, by base station After downlink information receives, handled to processor 1780；In addition, the data for designing uplink are sent to base station.In general, RF circuit 1710 include but is not limited to antenna, at least one amplifier, transceiver, coupler, low-noise amplifier (Low Noise Amplifier, LNA), duplexer etc..In addition, RF circuit 1710 can also be logical with network and other equipment by wireless communication Letter.Any communication standard or agreement, including but not limited to global system for mobile communications (Global can be used in above-mentioned wireless communication System of Mobile communication, GSM), general packet radio service (General Packet Radio Service, GPRS), CDMA (Code Division Multiple Access, CDMA), wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA), long term evolution (Long Term Evolution, LTE), Email, short message service (Short Messaging Service, SMS) etc..
Memory 1720 can be used for storing software program and module, and processor 1780 is stored in memory by operation 1720 software program and module, thereby executing the various function application and data processing of mobile phone.Memory 1720 can be led It to include storing program area and storage data area, wherein storing program area can be needed for storage program area, at least one function Application program (such as sound-playing function, image player function etc.) etc.；Storage data area, which can be stored, uses institute according to mobile phone Data (such as audio data, phone directory etc.) of creation etc..In addition, memory 1720 may include high random access storage Device, can also include nonvolatile memory, and a for example, at least disk memory, flush memory device or other volatibility are solid State memory device.
Input unit 1730 can be used for receiving the number or character information of input, and generate with the user setting of mobile phone with And the related key signals input of function control.Specifically, input unit 1730 may include touch panel 1731 and other inputs Equipment 1732.Touch panel 1731, also referred to as touch screen collect touch operation (such as the user of user on it or nearby Use the behaviour of any suitable object or attachment such as finger, stylus on touch panel 1731 or near touch panel 1731 Make), and corresponding attachment device is driven according to preset formula.Optionally, touch panel 1731 may include touch detection Two parts of device and touch controller.Wherein, the touch orientation of touch detecting apparatus detection user, and detect touch operation band The signal come, transmits a signal to touch controller；Touch controller receives touch information from touch detecting apparatus, and by it It is converted into contact coordinate, then gives processor 1780, and order that processor 1780 is sent can be received and executed.In addition, Touch panel 1731 can be realized using multiple types such as resistance-type, condenser type, infrared ray and surface acoustic waves.In addition to touch surface Plate 1731, input unit 1730 can also include other input equipments 1732.Specifically, other input equipments 1732 may include But in being not limited to physical keyboard, function key (such as volume control button, switch key etc.), trace ball, mouse, operating stick etc. It is one or more.
Display unit 1740 can be used for showing information input by user or be supplied to user information and mobile phone it is each Kind menu.Display unit 1740 may include display panel 1741, optionally, can use liquid crystal display (Liquid Crystal Display, LCD), the forms such as Organic Light Emitting Diode (Organic Light-Emitting Diode, OLED) To configure display panel 1741.Further, touch panel 1731 can cover display panel 1741, when touch panel 1731 detects After arriving touch operation on it or nearby, processor 1780 is sent to determine the type of touch event, is followed by subsequent processing device 1380 provide corresponding visual output according to the type of touch event on display panel 1741.Although in Figure 17, touch surface Plate 1731 and display panel 1741 are the input and input function for realizing mobile phone as two independent components, but certain In embodiment, can be integrated by touch panel 1731 and display panel 1741 and that realizes mobile phone output and input function.
Mobile phone may also include at least one sensor 1750, such as optical sensor, motion sensor and other sensors. Specifically, optical sensor may include ambient light sensor and proximity sensor, wherein ambient light sensor can be according to ambient light Light and shade adjust the brightness of display panel 1741, proximity sensor can close display panel when mobile phone is moved in one's ear 1741 and/or backlight.As a kind of motion sensor, accelerometer sensor can detect in all directions (generally three axis) and add The size of speed can detect that size and the direction of gravity when static, can be used to identify application (such as the horizontal/vertical screen of mobile phone posture Switching, dependent game, magnetometer pose calibrating), Vibration identification correlation function (such as pedometer, tap) etc.；Also as mobile phone The other sensors such as configurable gyroscope, barometer, hygrometer, thermometer, infrared sensor, details are not described herein.
Voicefrequency circuit 1760, loudspeaker 1761, microphone 1762 can provide the audio interface between user and mobile phone.Audio Electric signal after the audio data received conversion can be transferred to loudspeaker 1761, be converted by loudspeaker 1761 by circuit 1760 For voice signal output；On the other hand, the voice signal of collection is converted to electric signal by microphone 1762, by voicefrequency circuit 1760 Audio data is converted to after reception, then by after the processing of audio data output processor 1780, through RF circuit 1710 to be sent to ratio Such as another mobile phone, or audio data is exported to memory 1720 to be further processed.
WiFi belongs to short range wireless transmission technology, and mobile phone can help user's transceiver electronics postal by WiFi module 1770 Part, browsing webpage and access streaming video etc., it provides wireless broadband internet access for user.Although Figure 17 shows WiFi module 1770, but it is understood that, and it is not belonging to must be configured into for mobile phone, it can according to need do not changing completely Become in the range of the essence of invention and omits.
Processor 1780 is the control centre of mobile phone, using the various pieces of various interfaces and connection whole mobile phone, By running or execute the software program and/or module that are stored in memory 1720, and calls and be stored in memory 1720 Interior data execute the various functions and processing data of mobile phone, to carry out integral monitoring to mobile phone.Optionally, processor 1780 may include one or more processing units；Preferably, processor 1780 can integrate application processor and modulation /demodulation processing Device, wherein the main processing operation system of application processor, user interface and application program etc., modem processor is mainly located Reason wireless communication.It is understood that above-mentioned modem processor can not also be integrated into processor 1780.
Mobile phone further includes the power supply 1790 (such as battery) powered to all parts, it is preferred that power supply can pass through power supply Management system and processor 1780 are logically contiguous, to realize management charging, electric discharge and power consumption pipe by power-supply management system The functions such as reason.
Although being not shown, mobile phone can also include camera, bluetooth module etc., and details are not described herein.
In embodiments of the present invention, the sending module 103 of network sending node can be realized by RF circuit 1710, obtain mould Block 201, determining module 101, configuration module 102 and execution module 301 can be realized by processor 1780.
In embodiments of the present invention, the receiving module 401 of network receiving node can be realized by RF circuit 1710, obtain mould Block 402, execution module 501 and detection module 601 can be realized by processor 1780.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description, The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In several embodiments provided herein, it should be understood that disclosed system, device and method can be with It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit It divides, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components It can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown or The mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, the indirect coupling of device or unit It closes or communicates to connect, can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme 's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product When, it can store in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words It embodies, which is stored in a storage medium, including some instructions are used so that a computer Equipment (can be personal computer, server or the network equipment etc.) executes the complete of each embodiment the method for the present invention Portion or part steps.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can store journey The medium of sequence code.
The above, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although referring to before Stating embodiment, invention is explained in detail, those skilled in the art should understand that: it still can be to preceding Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these It modifies or replaces, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.

Claims (28)

1. a kind of network sending node characterized by comprising
Determining module, for determining the time domain length of next or multiple radio frames of current radio frames in unlicensed spectrum, institute State the time domain length of next or multiple radio frames and the time domain length Length discrepancy of the current radio frames；
Configuration module configures described next or multiple nothings for the time domain length according to described next or multiple radio frames Line frame；
Sending module, for when by idle channel evaluate and test CCA detect idle channel when, by the described next or more of configuration A radio frames are sent to network receiving node.
2. network sending node according to claim 1, which is characterized in that the network sending node further include: obtain Module；
The acquisition module, for obtaining the time domain length of current radio frames；
The determining module, specifically for determining that one or more time domains different from the time domain length of the current radio frames are long Degree, as the time domain length of described next or multiple radio frames, each radio frames in described next or multiple radio frames The time domain length determining module generates at random between most short radio frames time domain length and longest radio frames time domain length.
3. network sending node according to claim 1, which is characterized in that
The sending module is also used to the information of the time domain length of described next or multiple radio frames being sent to the network Receiving node.
4. network sending node according to claim 1, which is characterized in that
The determining module, specifically for choosing a radio frames time domain length sequence in radio frames time domain length sequence sets, The time domain length of described next or multiple radio frames is determined according to the radio frames time domain length sequence, wherein described wireless Frame time domain length sequence sets are the set of the radio frames time domain length sequence, and the radio frames time domain length sequence includes multiple Element, the numerical value of at least one element and the numerical value of other elements are unequal, and corresponding one of the numerical value of each element is wireless The time domain length of frame.
5. network sending node according to claim 4, which is characterized in that the network sending node further include: obtain Module；
The acquisition module, for obtaining the mark of the radio frames time domain length sequence；
The sending module is also used to the mark being sent to the network receiving node.
6. network sending node according to claim 4, which is characterized in that the network sending node further include: execute Module；
The execution module, for generating radio frames time domain length sequence group according to the radio frames time domain length sequence；
The sending module is also used to for the generating mode of radio frames time domain length sequence group being sent to the network and receives section Point.
7. network sending node according to claim 6, which is characterized in that
The execution module is specifically used for executing cyclic shift to the radio frames time domain length sequence, generates radio frames time domain Length sequences group.
8. network sending node according to claim 6, which is characterized in that
The execution module is specifically used for executing period expansion to the radio frames time domain length sequence, generates radio frames time domain Length sequences group.
9. a kind of network receiving node characterized by comprising
Obtain module, for obtaining the time domain length of next or multiple radio frames, described next or multiple radio frames when The time domain length Length discrepancy of received current radio frames on length of field and unlicensed spectrum；
Receiving module receives what network sending node was sent for the time domain length according to described next or multiple radio frames Next or multiple radio frames.
10. network receiving node according to claim 9, which is characterized in that
The acquisition module, specifically for receive described next or multiple radio frames that the network sending node is sent when The information of length of field, the time domain length of each radio frames is that the network sending node exists in described next or multiple radio frames It is generated at random between most short radio frames time domain length and longest radio frames time domain length.
11. network receiving node according to claim 9, which is characterized in that
The acquisition module, specifically for receiving the mark for the radio frames time domain length sequence that the network sending node is sent, Corresponding radio frames time domain length sequence is obtained from radio frames time domain length sequence sets according to the mark, when the radio frames Length of field sequence sets are the set of the radio frames time domain length sequence, and the radio frames time domain length sequence includes multiple members Element, the numerical value of at least one element and the numerical value of other elements are unequal, and the corresponding radio frames of numerical value of each element Time domain length.
12. network receiving node according to claim 11, which is characterized in that the network receiving node further include: hold Row module；
The execution module, for receiving the generating mode for the radio frames time domain sequences group that the network sending node is sent, root The radio frames time domain sequences are converted according to the generating mode of the radio frames time domain sequences group, when obtaining the radio frames Domain sequence group, and determine according to the radio frames time domain sequences group time domain length of described next or multiple radio frames.
13. according to network receiving node described in right 9, which is characterized in that the network receiving node further include: detection mould Block；
The detection module determines next or multiple nothings for the time domain length according to described next or multiple radio frames The time-domain position of control infomation detection is executed in line frame, and in the time-domain position detection control letter for executing control infomation detection Breath.
14. according to network receiving node described in right 9, which is characterized in that the network receiving node further include: detection mould Block；
The detection module determines described next or more for the time domain length according to described next or multiple radio frames The signal duration of the last one subframe executes and according to the signal duration in each radio frames in a radio frames Corresponding rate-matched.
15. a kind of method for transmitting signals of wireless network characterized by comprising
Network sending node determines the time domain length of next or multiple radio frames of current radio frames in unlicensed spectrum, described The time domain length Length discrepancy of the time domain length of next or multiple radio frames and the current radio frames；
The network sending node configures described next or multiple according to the time domain length of described next or multiple radio frames Radio frames；
When evaluating and testing CCA by idle channel and detecting idle channel, the network sending node is by the described next of configuration Or multiple radio frames are sent to network receiving node.
16. the method for transmitting signals of wireless network according to claim 15, which is characterized in that the network sending node The time domain length for determining next or multiple radio frames of current radio frames in unlicensed spectrum includes:
The network sending node obtains the time domain length of current radio frames；
The network sending node determines one or more time domain lengths different from the time domain length of the current radio frames, makees For the time domain length of described next or multiple radio frames, the time domain of each radio frames is long in described next or multiple radio frames The network sending node is spent to generate at random between most short radio frames time domain length and longest radio frames time domain length.
17. the method for transmitting signals of wireless network according to claim 16, which is characterized in that the network sending node One or more time domain lengths different from the time domain length of the current radio frames are determined, as described next or multiple nothings Include: after the time domain length of line frame
The information of the time domain length of described next or multiple radio frames is sent to the network and connect by the network sending node Receive node.
18. the method for transmitting signals of wireless network according to claim 15, which is characterized in that the network sending node The time domain length for determining next or multiple radio frames of current radio frames in unlicensed spectrum includes:
The network sending node chooses a radio frames time domain length sequence in radio frames time domain length sequence sets, according to institute State the time domain length that radio frames time domain length sequence determines described next or multiple radio frames, wherein the radio frames time domain Length sequences collection is the set of the radio frames time domain length sequence, and the radio frames time domain length sequence includes multiple elements, The numerical value of at least one element and the numerical value of other elements are unequal, and the corresponding radio frames of numerical value of each element when Length of field.
19. the method for transmitting signals of wireless network according to claim 18, which is characterized in that the network sending node According to the time domain length of described next or multiple radio frames, before configuring described next or multiple radio frames further include:
The network sending node obtains the mark of the radio frames time domain length sequence；
The mark is sent to the network receiving node by the network sending node.
20. the method for transmitting signals of wireless network according to claim 18, which is characterized in that the network sending node A radio frames time domain length sequence in radio frames time domain length sequence sets is chosen, according to the radio frames time domain length sequence Before the time domain length for determining described next or multiple radio frames further include:
The network sending node generates radio frames time domain length sequence group according to the radio frames time domain length sequence；
The generating mode of the radio frames time domain length sequence group is sent to the network and receives section by the network sending node Point.
21. the method for transmitting signals of wireless network according to claim 20, which is characterized in that the network sending node Generating radio frames time domain length sequence group according to the radio frames time domain length sequence includes:
The network sending node executes cyclic shift to the radio frames time domain length sequence, generates radio frames time domain length sequence Column group.
22. the method for transmitting signals of wireless network according to claim 20, which is characterized in that the network sending node Generating radio frames time domain length sequence group according to the radio frames time domain length sequence includes:
The network sending node executes period expansion to the radio frames time domain length sequence, generates radio frames time domain length sequence Column group.
23. a kind of method for transmitting signals of wireless network characterized by comprising
Network receiving node obtains the time domain length of next or multiple radio frames, the time domain of described next or multiple radio frames The time domain length Length discrepancy of received current radio frames in length and unlicensed spectrum；
The network receiving node receives network sending node and sends according to the time domain length of described next or multiple radio frames Next or multiple radio frames.
24. the method for transmitting signals of wireless network according to claim 23, which is characterized in that the network receiving node The time domain length for obtaining next or multiple radio frames includes:
The time domain that the network receiving node receives described next or multiple radio frames that the network sending node is sent is long The information of degree, the time domain length of each radio frames is the network sending node most short in described next or multiple radio frames It is generated at random between radio frames time domain length and longest radio frames time domain length.
25. the method for transmitting signals of wireless network according to claim 23, which is characterized in that the network receiving node The time domain length for obtaining next or multiple radio frames includes:
The network receiving node receives the mark for the radio frames time domain length sequence that the network sending node is sent, according to institute It states mark and obtains corresponding radio frames time domain length sequence, the radio frames time domain length from radio frames time domain length sequence sets Sequence sets are the set of the radio frames time domain length sequence, and the radio frames time domain length sequence includes multiple elements, at least The numerical value of one element and the numerical value of other elements are unequal, and the time domain of the corresponding radio frames of numerical value of each element is long Degree.
26. the method for transmitting signals of wireless network according to claim 25, which is characterized in that further include:
The network receiving node receives the generating mode for the radio frames time domain sequences group that the network sending node is sent, according to The generating mode of the radio frames time domain sequences group converts the radio frames time domain sequences, obtains the radio frames time domain Sequence group, and determine according to the radio frames time domain sequences group time domain length of described next or multiple radio frames.
27. according to the method for transmitting signals of wireless network described in right 23, which is characterized in that the network receiving node obtains Include: after the time domain length of next or multiple radio frames
The network receiving node determines described next or multiple according to the time domain length of described next or multiple radio frames The time-domain position of control infomation detection is executed in radio frames, and detects control in the time-domain position for executing control infomation detection Information.
28. according to the method for transmitting signals of wireless network described in right 23, which is characterized in that the network receiving node obtains Include: after the time domain length of next or multiple radio frames
The network receiving node determines described next or multiple according to the time domain length of described next or multiple radio frames The signal duration of the last one subframe executes phase and according to the signal duration in each radio frames in radio frames The rate-matched answered.
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CN110086569B (en) * 2019-04-03 2022-04-15 上海无线通信研究中心 Internet of vehicles variable frame communication method, terminal and system
WO2022047650A1 (en) * 2020-09-02 2022-03-10 Qualcomm Incorporated Channel occupancy time sharing for frame-based equipment

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