CN105992222A - Channel resource competition method and device - Google Patents
Channel resource competition method and device Download PDFInfo
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- CN105992222A CN105992222A CN201510046778.0A CN201510046778A CN105992222A CN 105992222 A CN105992222 A CN 105992222A CN 201510046778 A CN201510046778 A CN 201510046778A CN 105992222 A CN105992222 A CN 105992222A
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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]
- H04W74/0808—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using carrier sensing, e.g. as in CSMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0006—Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio
Abstract
The application discloses a channel resource competition method. The method comprises the steps of using a device to determine a parameter to execute expanded clear channel assessment (ECCA) according to a current frame structure; using the device to execute the CCA, detecting the channel state of a free license frequency band, and occupying a channel when a channel idle condition is determined to satisfy according to the parameter of the ECCA. By the application, the channel occupation of the free license frequency band can be realized reasonably, and the friendly coexistence with other systems in the free license frequency band is guaranteed.
Description
Technical field
Disclosure relates generally to wireless communication field, is specifically related to, based on competitory assignment channel resource, particularly relate to
In the method exempting to take up-downgoing channel resource based on competition mechanism in licensed band in Long Term Evolution (LTE) system
And communication equipment.
Background technology
Along with the development of cellular wireless mobile communication system, the quantity of mobile subscriber gets more and more.So at a high speed
Development bring opportunity and also bring pressure and challenge.Frequency spectrum resource is limited, portfolio is increased sharply, load of base station
Excessive, coverage not etc. problem is required for studying novel communication technology and solves.
Long Term Evolution (LTE) system of third generation partner program (3GPP) standardization body supports frequency division
Duplex (FDD) and two kinds of duplex modes of time division duplex (TDD).As it is shown in figure 1, Fig. 1 is prior art
FDD wireless frame structure schematic diagram, for FDD system, the length of each radio frames is 10ms, comprises 10
The subframe of individual a length of 1ms.Wherein, subframe is made up of the time slot of two a length of 0.5ms of continuous print, i.e. kth
Individual subframe comprises time slot 2k and time slot 2k+1, k=0,1 ... 9.As in figure 2 it is shown, Fig. 2 is the TDD of prior art
Wireless frame structure schematic diagram, for TDD system, the radio frames of each 10ms is divided into two a length of 5ms
Field.Wherein, each field comprises the subframe of 8 a length of 0.5ms and 3 special domain, i.e. descending pilot frequencies
Time slot (DwPTS), protection interval (GP) and uplink pilot time slot (UpPTS), these 3 special domain
Length and be 1ms.Each subframe is made up of two continuous print time slots, i.e. kth subframe comprise time slot 2k and time
Gap 2k+1, k=0,1 ... 9.One downlink times interval (TTI) is defined in a subframe.
When TDD radio frames is configured, support 7 kinds of upstream and downstream configurations, as shown in table 1.In table 1,
D represents that descending sub frame, U represent that sub-frame of uplink, S represent the above-mentioned special subframe comprising 3 special domain.
Table 1
Wherein, front n OFDM (OFDM) symbol of each descending sub frame may be used for transmitting descending
Control information, Downlink Control Information includes Physical Downlink Control Channel (PDCCH, Physical Downlink
Control Channel) and other control information, wherein, n is equal to 0,1,2,3 or 4.Remaining OFDM
Symbol can be used to transmitting physical DSCH Downlink Shared Channel (PDSCH, Physical Downlink Shared Channel)
Or strengthen Physical Downlink Control Channel (EPDCCH).In LTE system, PDCCH and EPDCCH
Carrying distribution uplink channel resources or Downlink Control Information (DCI, the Downlink Control of down channel resources
Information), downstream grants signaling (DL Grant) and uplink authorization signaling (UL Grant) it are called.
In LTE system, the DCI of different user devices (UE) independently sends, and DL Grant therein
Independently send with UL Grant.
In the enhancing system of LTE system, by combining multiple unit carrier waves (CC, component carrier)
Obtain bigger bandwidth of operation, i.e. use carrier aggregation (CA, carrier aggregation) to constitute communication system
The downlink of system and up-link, thus support higher transfer rate.Here, the CC condensed together was both
Identical duplex mode can be used, i.e. Quan Shi FDD community or be TDD cell entirely, it would however also be possible to employ no
, there is FDD community and TDD cell in same duplex mode the most simultaneously.To a UE, base station can configure it
Work in multiple communities (Cell), one of them is main Cell (Pcell, primary cell), and other
Cell is referred to as time Cell (Scell, secondary cell).In above-mentioned existing LTE CA system, to same
The initial transmission of individual transmission block (TB, transport block) and HARQ retransmit and are limited to same
On CC.To LTE CA system, based on Physical Uplink Control Channel (PUCCH, Physical Uplink Contol
Channel) hybrid automatic repeat-request response (HARQ-ACK) and the channel condition information (CSI) transmitted
Only carry out on Pcell.This limits the motility of base station scheduling to a certain extent.In order to adapt to LTE system
The needs of evolution, need to improve the effectiveness of HARQ transmission under new scene.Such as, exempt from for UE configuration
The community of licensed band, the community exempting from licensed band generally can be configured the Scell of UE.
Exempting from licensed band the most the allocated for certain other purposes, such as, radar system and/or 802.11 is
WLAN (WiFi) system of row.The WiFi system of 802.11 series based on carrier sense multiple access/
The mechanism works of conflict avoidance (CSMA/CA), a mobile station (STA) have to before sending signal
Detection wireless channel, only idle when wireless channel and just can to take this after keeping certain period of time wireless
Channel sends signal.STA can combine employing two set mechanism and jointly judge radio channel state.On the one hand, STA
The detection wireless channel that carrier sense technology (Carrier Sensing) is actual can be used, when other STA being detected
Signal or the signal power that detects when exceeding setting thresholding, confirm that wireless channel does.At this moment, this STA
In null tone road monitoring (CCA, Clear Channel Assessment) reported to its high-rise module of physical layer block
Report instruction wireless channel hurries.On the other hand, the WiFi system of 802.11 series also introduces virtual carrier sensing in wireless network communication
Technology, i.e. network allocation vector (NAV, Network Allocation Vector), in each 802.11 frames
All contain persistent period (duration) territory, can not be in nothing according to the NAV value confirmation that duration field is arranged
Sending signal on line channel, NAV is the time that instruction needs reserved wireless channel
For LTE system, in order to meet the demand that service of mobile communication increases, need to excavate more frequency
Spectrum resource.It is a possible solution exempting from deployment LTE system in licensed band.Further, exempting from
In licensed band, it is also possible to deploy multiple LTE system simultaneously.Such as, the plurality of LTE system can be distinguished
It is under the jurisdiction of different operators.In order to simplicity describes, refer to base station and UE with LTE equipment below.In order to avoid
With other LTE system equipment or the interference of other wireless system equipment, LTE system equipment is before sending signal
Needing first to detect the state of channel, when only meeting channel occupancy condition, equipment could busy channel.Further,
The Channel holding time of equipment can be one or more subframe, then must discharge channel, thus leave it for
The chance of his hold facility channel.
According to Europe about exempting from the regulation (regulation) of licensed band, can there is two kinds of equipment, and
It is called equipment (FBE) based on frame and equipment based on load (LBE).To FBE, it is according to fixing
Frame period divide channel resource.As it is shown on figure 3, each frame includes Channel holding time and free time,
Wherein Channel holding time is less than or equal to 10ms, and free time is no less than the 5% of the frame period.To each frame,
Equipment needs to detect channel before this frame, and its CCA detection time is not less than 20us.Only when detecting
During channel idle, equipment just can take the channel resource of this frame.To LBE, the strategy of its competitive channel resource
Similar with WiFi, the unit interval (TU) of CCA detection is at least 20us, and equipment performs in a TU
CCA detects channel, if it find that channel idle, then equipment can direct busy channel；If it find that channel busy,
Then equipment needs to start extension CCA (ECCA) process, i.e. randomly generates number N and arranges CCA inspection
The enumerator surveyed, this equipment finds that channel keeps the free time then can subtract above-mentioned enumerator in a TU every time
One, if this equipment finds channel busy, then enumerator keeps constant, when counter clear when, this
Equipment can be with busy channel.Here, N is to randomly select in the range of [1, q], and the span of q is
From 4 to 32.To LBE equipment, when meeting channel occupancy condition, it can be long with the maximum time of busy channel
Degree is equal to.So, to exempting from the LTE system of deployment, two kinds of possible works based on above-mentioned regulation in licensed band
Make mode, need to formulate the strategy of competitive channel resource, effectively support the downstream transmission of LTE, and ensure with
The close friend of the other system exempting from licensed band coexists.
Summary of the invention
This application provides the method for competitive channel resource, equipment and base station, provide effectively for LBE and FBE equipment
Channel resource competitive way, and ensure coexist with the close friend exempting from licensed band other system.
For achieving the above object, the application adopts the following technical scheme that:
A kind of method of competitive channel resource, including:
Equipment determines the parameter performing ECCA according to current frame structure；
Described equipment performs CCA, and the channel status of licensed band is exempted from detection, and in the ginseng according to described ECCA
Number determines busy channel when meeting channel idle condition.
It is preferred that according to current frame structure, described equipment determines that the parameter performing ECCA includes: described equipment root
Determine the maximum channel holding time of current permission according to current frame structure, and adjust according to this maximum channel holding time
The parameter of whole ECCA.
Determine that the parameter performing ECCA includes it is preferred that described according to current frame structure: starting ECCA letter
Before road detection, equipment determines time span T0 wishing to take destination channel, adjusts the parameter of ECCA according to T0,
And during being applied to the whole ECCA before this channel occupancy.
It is preferred that to different types of downstream signal, described equipment determines its corresponding time span T0 respectively；Or
Person, to channel occupancy each time, described equipment determines its corresponding time span T0 respectively.
It is preferred that the parameter that the maximum channel holding time that described basis currently allows adjusts ECCA includes: institute
State base station and adjust the parameter of ECCA according to the smaller value in T0 and A；Wherein, described A is from current detection
Time span between the moment of channel to the moment that next time must interrupt channel occupancy, described T0 is for starting
Before ECCA Channel Detection, equipment wishes the time span of busy channel.
It is preferred that the described parameter according to the smaller value adjustment ECCA in T0 and A includes:
The value of q when determining every time detection channel status according to the smaller value in T0 and A；Determine current target
Random number NkFor Nk=ceil (N1·qk/q1), or, Nk=ceil (α qk), or Nk=ceil (Nk-1·qk/qk-1)；
Or,
Determine value q of q when previous detection channel statusk, from 1 to qkIn directly produce target random number Nk；
Wherein, q1Q when detecting channel status after interrupting equidirectional channel occupancy last time for the first time for described equipment
Value, N1For corresponding q1The target random number chosen, α ∈ (0,1) is corresponding initial target random number N1In (0,1)
In the range of random number, qk-1The q's that when revising the value of q for the described equipment last time, detection channel status uses
Value, Nk-1For corresponding qk-1The target random number chosen, qkFor q during described equipment current detection channel status
Value.
It is preferred that described channel idle condition is: value X of nonce counter is more than or equal to Nk。
A kind of method of competitive channel resource, including:
On the channel exempting from licensed band, allocate the sub-frame of uplink for uplink in this channel in advance；
Described base station is by the most unscheduled described sub-frame of uplink or the institute of the scheduling being not detected by upward signal
State sub-frame of uplink, for downlink transfer.
Include it is preferred that described for downlink transfer:
The Channel holding time of the downlink transfer before specifying sub-frame of uplink is extended to described appointment sub-frame of uplink
In；Or,
Described base station starts to perform described CCA detection on described appointment sub-frame of uplink, and meets channel described
Described transmission downlink data is utilized during idle condition busy channel；
Wherein, described appointment sub-frame of uplink is the most unscheduled described sub-frame of uplink or is not detected by up
The described sub-frame of uplink of the scheduling of signal.
A kind of method of competitive channel resource, including:
Each time within the time period of assigned direction transmission, determine described equipment actual transmission respective direction letter
Number beginning timing；
Described equipment detected channel before described beginning regularly, if channel idle, described hold facility channel is sent out
The number of delivering letters；Otherwise, described equipment can not take when previous channel resource.
It is preferred that when described assigned direction is up direction:
All UE in same community use identical described beginning timing；And/or,
All UE in all communities of same operator use identical described beginning timing.
It is preferred that described assigned direction is up direction, the described beginning timing determining equipment includes:
Presetting timing slip sequence, described timing slip sequence is by the timing of corresponding described sub-frame of uplink resource
Deviant forms；
Described equipment determines when previous ascending resource and corresponding timing off-set value, and by upward signal
Initial time starts timing advance with the standard of TDD system or postpones the time of the timing off-set value determined.
It is preferred that when described assigned direction is up direction, the described up beginning timing determining equipment includes:
Base station configures the Timing Advance N of corresponding described sub-frame of uplink resource to described equipmentTA, described equipment is according to described
(NTA+NTA offset)×TsDetermine the up beginning timing of equipment；Wherein, NTA offsetBe one set in advance fixing partially
Move.
It is preferred that when described assigned direction is up direction, the described up beginning timing determining equipment includes:
The up timing of UE is relative to the reception timing advance of its corresponding descending sub frameWherein, NTAIt is the Timing Advance being allocated to described UE, NTA offsetIt is
One fixing skew,Correspond to the timing off-set value of different sub-frame of uplink resource settings.
It is preferred that generate for community in advanceSequence, each value in sequence is used for representing corresponding subframe
'sSide-play amount；Or,
By the parameter used during the specific signal deployment uplink of community
It is preferred that when described assigned direction is up direction, the described up beginning timing determining equipment includes:
To a community, it is held on row subframe timing constant, is punched in the beginning of described sub-frame of uplink,
Change the actual timing sending upward signal of UE.
It is preferred that most 3 OFDM symbols that subframe is anterior are destroyed in the punch operation support carrying out sub-frame of uplink
Number.
It is preferred that described punch operation is carried out in units of SCFDMA symbol or in units of G us；G is
The positive integer set.
It is preferred that generate the sequence of punching time span in advance for community, each value in sequence is used for representing right
Answer the punching time span of assigned direction subframe；Or,
By the punching time span needing use during the uplink of specific signal deployment of community.
A kind of equipment of competitive channel resource, including: ECCA parameter determination unit, CCA detector unit sum
According to transmission unit；
Described ECCA parameter determination unit, for determining the parameter performing ECCA according to current frame structure；
Described CCA detector unit, is used for performing CCA, the channel status of detection faces licensed band, and in basis
The parameter determination of described ECCA notifies described data transmission unit when meeting channel idle condition；
Described data transmission unit, for receiving the notice busy channel number of described CCA detector unit
According to transmission.
A kind of equipment of competitive channel resource, including: sub-frame of uplink determines unit, idle-detection unit and descending biography
Defeated unit；
Described sub-frame of uplink determines unit, for according to allocating the up son determined in channel for uplink in advance
Frame；
Described idle-detection unit, for determining the most unscheduled sub-frame of uplink or not detecting behaviour's upward signal
The sub-frame of uplink of scheduling, and notify that the sub-frame of uplink determined is used for downlink transfer by described downlink transfer unit.
A kind of equipment of competitive channel resource, including: start timing determination unit, detection Channel Elements and transmission single
Unit；
Described beginning timing determination unit, for each time within the time period of assigned direction transmission, determining reality
Border sends the beginning timing of respective direction signal；
Described detection Channel Elements, for detection letter before starting the beginning timing that timing determination unit is determined
Road, and notify that when channel idle described transmission unit busy channel sends signal.
As seen from the above technical solution, in the application, can be by the parameter of ECCA for LBE equipment
Control channel occupancy, or, utilize unappropriated ascending resource to carry out downlink transfer, thus more effectively
Ground utilizes the resource exempting from licensed band；For FBE equipment, the saltus step utilizing transmission to start timing makes difference
Equipment is all had an opportunity to take and is exempted from licensed band and be transmitted.
Accompanying drawing explanation
Fig. 1 shows the structural representation of the FDD radio frames of prior art；
Fig. 2 shows the structural representation of the TDD radio frames of prior art；
Fig. 3 shows the operating diagram of the FBE equipment specified according to Europe；
Fig. 4 shows the schematic diagram adjusting ECCA parameter according to possible Channel holding time；
Fig. 5 shows the schematic diagram of differentiating uplink and downlink resource；
Fig. 6 shows unused ascending resource for the schematic diagram of downlink transfer；
Fig. 7 shows by adjusting the schematic diagram that sub-frame of uplink timing realization close friend coexists；
Fig. 8 shows and realizes, by punching sub-frame of uplink front portion, the schematic diagram that close friend coexists.
Detailed description of the invention
In order to make the purpose of the application, technological means and advantage clearer, below in conjunction with accompanying drawing to this Shen
Please be described in further details.
In order to make full use of the channel resource of the carrier wave exempting from licensed band, embodiments herein provides down
The scheme processing downstream transmission in face, the method including three kinds of competitive channel resources altogether, wherein, embodiment one
With embodiment two corresponding to LBE equipment, embodiment three is corresponding to FBE equipment.Separately below the application is provided
Competitive channel resource allocation method be described in detail.
Embodiment one
Improved method based on LBE is described below.The method of the present embodiment can apply to downlink transfer and up
Transmission.
Specifically, on the carrier wave exempting from licensed band, on some specific times, channel resource is permissible
It it is the data transmission that cannot be used for certain direction.Such as, this carrier wave may need generate some specific
Free time, and make all LTE equipment can not transmit on this carrier wave, such as, can on these free times
Being for measuring from the signal of other system.Or, at this carrier wave, some specific subframes are reserved
For uplink, correspondingly base station needs to switch to reception state, so base station is the most certain in these subframes
Can not transmission of downlink signal.To problem as described above, a common ground is that equipment based on LBE must be one
A little specific timing positions interrupt channel occupancy, that is, to based on LBE equipment, attempt busy channel at it
Time, due to the restriction of current frame structure, possible maximum channel holding time is limited.
Following equipment performs CCA detection channel and judges whether to be referred to as with the process of busy channel
ECCA.In general, to ECCA mechanism, can be first to obtain needs according to destination channel holding time T to adopt
Target random number upper limit q, then randomly generate a target random number N according to q, the span of N is
From 1 to q.Equipment is with the time span of TU for granularity Detection channel status, if channel is protected in a TU
Hold the free time, then equipment is thought and is found that a channel idle.When the number of times of equipment Inspection to channel idle reaches N
Time secondary, equipment can send signal with busy channel.
Above-mentioned destination channel holding time T can be a fixing numerical value, or high level is semi-statically configured
Numerical value.Especially, for busy channel, before starting ECCA Channel Detection, equipment may determine that hope
Take time span T0 of destination channel, thus obtain other parameters of ECCA according to T0, and be applied to this
Secondary channel take before whole ECCA during.Here, the function completed as required, base station can be sent out
Sending different types of downstream signal, it correspondingly needs the time T0 of busy channel to be also different.Such as, base
The signal sent of standing can be downlink data, and it needs the time taken the most long, such that it is able to send more
Many downlink datas；Or, the downstream signal that base station sends can only find reference signal (DRS),
The number of sub-frames that DRS takies can be fewer；Or, to measure to complete CSI, base station is it is also possible to send
Being exclusively used in the reference signal that CSI measures, such as CRS or CSI-RS, it needs the time of busy channel to have can
Can be less than a subframe.So, to different types of downstream signal, it needs busy channel time T0 to be different
's.The present invention proposes, and to different types of downstream signal, needs the time T0 of busy channel as mesh according to it
Mark Channel holding time T processes ECCA.Further, even if to same type of downstream signal, if
The time span of each busy channel of equipment is also variable, then can be to channel occupancy each time before
ECCA process, remembers that the destination channel holding time of its channel occupancy is T0, then can process specifically according to T0
The ECCA process of channel occupancy.
Or, above-mentioned destination channel holding time T can also be to take according to the maximum channel that currently may allow
Time adjusts.To based on LBE equipment, the application proposes, and according to current frame structure, remembers from detection channel
Moment to the moment that next time must interrupt channel occupancy between time span be A, determine and currently can permit
The length of the maximum channel holding time permitted, and correspondingly adjust the parameter of its ECCA.Specifically, logical
In the case of Chang, it is assumed that equipment wishes maximum time length T0 of busy channel, and T0 is less than A, and equipment is permissible
It is selected to perform the parameter of ECCA according to Channel holding time T=min (T0, A)=T0；When distance is had to
When the moment of interruption channel occupancy is nearer, i.e. A is less than T0, and at this moment, equipment can be according to Channel holding time
T=min (T0, A)=A adjusts the parameter of ECCA and continues competitive channel resource.Here ECCA parameter is
Upper limit q of the target random number that finger equipment produces and value N of target random number.Once attempting access channel
Time, the above-mentioned adjustment to ECCA parameter can be to be carried out, i.e. often before the Channel Detection of each TU
Before CCA detection in individual TU, all adjust according to the maximum channel holding time A that currently may allow
ECCA parameter；Or, it is also possible to be the most again to adjust ECCA parameter every multiple TU, i.e. every on
State multiple TU, before just the CCA at a TU detects, when taking according to the maximum channel that currently may allow
Between A adjust ECCA parameter；Or, the adjustment of ECCA parameter can also be the condition according to other, example
As just adjusted ECCA parameter when that equipment needing to detect channel status near sub-frame boundary, i.e. on subframe limit
Near boundary, before the CCA of a TU detects, according to the maximum channel holding time A that currently may allow
Adjust ECCA parameter；Or, to the ECCA process before a channel occupancy, equipment can be only at it
The when of starting CCA detection, the maximum channel holding time A according to allowing selects ECCA parameter,
And it is applied to whole ECCA process.Below by an example, a kind of concrete execution mechanism is described.Such as Fig. 4
Shown in, it is assumed here that the specific sub-frame on channel is periodically distributed for uplink, in the most every 9 subframes
Continuous 3 subframes are had to distribute for uplink.Assume that base station starts detection from the position of CCA detection time 1
Channel, and assume that base station wishes that the maximum time of busy channel is 6ms.When base station is in the CCA detection time 1
During the detection channel of position, because the descending holding time A of maximum possible is 6ms, so, according to the rule in Europe
Fixed, equipment can select q according to value 6ms of A1Process ECCA equal to 15, i.e. randomly generate 1 and arrive
Target random number N 1 between 15, and to initialize free counter be 0.It follows that this equipment Inspection letter
Road, if it find that channel keeps the free time then to add 1 to above-mentioned free counter in a TU.If target is random
Number does not changes, and when the numerical value of free counter is equal to target random number N 1, equipment can enter with busy channel
Row data are transmitted.Usually, before performing Channel Detection in specific T U, base station can be according to currently
The remaining maximum possible busy channel time adjusts ECCA parameter.For example, it is assumed that detect the time 1 from CCA
Start to fail to meet channel occupancy condition always, then detect time k at CCA, because remaining maximum possible
Descending holding time A is 4ms, then equipment can adjust ECCA parameter according to value 4ms of A.Actual
On, according to European standard, value 4ms of corresponding A, equipment can select qkECCA is processed equal to 10.
So, according to qk, equipment can with equipment adjust ECCA operation target random number, note adjust after target with
Machine number is Nk.N is described belowkProcessing method.
Here, first method is, it is assumed that target random number upper limit q of CCA detection time kkRelative to before
CCA detection the target random number upper limit change, the most directly randomly generate a random number NkAs newly
Target random number, NkSpan be from 1 to qk.The value of note current idle enumerator is X, if X
More than or equal to Nk, then equipment need not again perform CCA and just can directly carry out data transmission by busy channel；No
Then, continue detection channel, and when channel idle being detected in the time at a TU, to free counter
Add 1.If target random number no longer changes, then when the numerical value of free counter is equal to target random number Nk
Time, equipment can carry out data transmission with busy channel.
Or, the second adjusts the method for ECCA parameter and is, determines detection every time according to the value of A or T0
The value of target random number upper limit q during channel, during note equipment initial detecting channel status, the value of q is q1,
Initial target random value is N1, to when previous channel state-detection, according to currently can with the time of busy channel,
Obtain target random number upper limit q that can usek, then can be according to q1And qkValue revise initial detecting letter
The target random number that road state produces obtains current target random number Nk, for example, it is possible to revise current target
Random number NkFor Nk=ceil (N1·qk/q1).In the above example, q1Equal to 15, qkEqual to 10, then revise
The target random number of CCA detection time k is Nk=ceil (N1·10/15).Or, during note initial detecting channel status
The target random number N produced1=ceil (α q1), wherein α ∈ (0,1) is corresponding initial target random number N1In (0,1)
In the range of random number, then can also revise current target random number NkFor Nk=ceil (α qk).So, note
The value of nonce counter is X, if X is more than or equal to Nk, then equipment need not again perform CCA just can be straight
Connect busy channel to carry out data transmission；Otherwise, continue detection channel, and when detecting within the time of a TU
During to channel idle, free counter is added 1.If target random number no longer changes, then work as idle count
The numerical value of device is equal to target random number NkTime, equipment can carry out data transmission with busy channel.Above carry out
During ECCA parameter adjustment, the time of equipment initial detecting channel status refers to terminate release from downlink transfer last time
After channel, the CCA detection carried out when needing and sending new downlink transfer bag.
Or, the third method adjusting ECCA parameter is, determines detection every time according to the value of A or T0
The value of target random number upper limit q during channel, when previous channel state-detection, according to currently taking letter
The time in road, obtain target random number upper limit q that can usek, and remember before this detection channel time mesh
The mark random number upper limit is qk-1, corresponding target random number is designated as Nk-1, then can also be according to qkAnd qk-1Repair
Positive Nk-1Obtain current target random number Nk.For example, it is possible to obtain revised current goal random number
Nk=ceil (Nk-1·qk/qk-1).For example, it is assumed that qkEqual to 10, qk-1Equal to 12, then revise CCA and detect the time
The target random number of k is Nk=ceil (Nk-1·10/12).So, the value of note nonce counter is X, if X is big
In equal to Nk, then equipment need not again perform CCA and just can directly carry out data transmission by busy channel；No
Then, continue detection channel, and when channel idle being detected in the time at a TU, to free counter
Add 1.If target random number no longer changes, then when the numerical value of free counter is equal to target random number Nk
Time, equipment can carry out data transmission with busy channel.
Embodiment two
Assume, on the channel exempting from licensed band, to support that up-downgoing passes based on time-multiplexed method
Defeated.Usually, the mode in the present embodiment is applied to the processing procedure of downlink transfer.
Here, some subframes are had to can be used for uplink.Such subframe can be the semi-static cycle
Property distribution.Such as, sub-frame of uplink assignment period is T, and starts even at sub-frame offset s within each cycle
L subframe of continuous distribution.Here, s=0,1 ... T-1, L are less than or equal to T.Especially, s can be equal to T-L.
Or, the position of sub-frame of uplink can also be to rely on uplink authorization signaling (UL grant), when UE is in subframe
When receiving UL grant in n, according to certain timing relationship, it is believed that subframe n+k may be used for uplink.k
Depend on the timing relationship from UL grant to PUSCH place sub-frame of uplink.Here, although some subframes are point
It is used in uplink, but UE is still probably due to channel busy detected and actual can not send up letter
Number.
Assume that some subframes are distributed for uplink, then, a kind of processing method is, true in spite of there being UE
These subframes that utilize have sent upstream data, can be that base station is fixing thinks that these subframes cannot be used for descending biography
Defeated, i.e. base station will not carry out CCA detection within the time of these subframes, also will not take these subframes and send
Downlink data.As shown in fig. 5, it is assumed that the cycle of subframe distribution is 9 subframes, and assume rear the 3 of each cycle
Individual subframe may be used for uplink.Using this method, rear 3 subframes in each cycle can only be kept for
Uplink, and downlink transfer is to be confined in other 6 subframes in each cycle.Here, suppose that base station is adjusted
Spend the uplink of UE, but all of UE do not sent upward signal because channel busy being detected,
The most above-mentioned subframe is practically without for uplink.In this case, though the channel of base station location
Being in CCA idle condition, base station can not send data, causes the wasting of resources.
In order to avoid the above-mentioned wasting of resources, the second processing method is, base station can be the most unscheduled up
Although subframe or scheduled uplink but be not detected by the ascending resource of any upward signal for descending
Transmission.
Specifically, two kinds of concrete conditions can be divided into for above-mentioned ascending resource for downlink transfer.The first feelings
Condition is, it is assumed that a subframe or continuous multiple subframe may be used for uplink, but, it is assumed that base station is current
There is no the uplink of any UE of semi-static distribution, the most do not dispatch the uplink of any UE, because up
The uplink of subframe the most at least 4ms dispatches, and base station there is currently no up in knowing these subframes
Signal, so the Channel holding time of the downlink transfer that base station is before above-mentioned sub-frame of uplink can be continued until
In above-mentioned subframe, the most above-mentioned sub-frame of uplink is actually used in downlink transfer.
The second situation is, it is assumed that the front the most descending holding time of base station terminated before above-mentioned sub-frame of uplink,
When base station is currently without the uplink of any UE of semi-static distribution, the most do not dispatch the uplink of any UE
Time, base station can be used in the sub-frame resources of uplink restarting CCA detection in these distribution originally, and
In the case of meeting channel idle condition, busy channel sends downlink data.Or, it is still assumed that before base station
The most descending holding time terminated before above-mentioned sub-frame of uplink, and assumed semi-static in sub-frame of uplink being assigned with
The uplink of UE or scheduled the uplink of UE, but base station detects upward signal on sub-frame of uplink
Time, confirming all of UE all not have according to its scheduling and send upward signal, then base station can be divided originally at these
Restart to carry out CCA detection on the remaining time of the subframe being used in uplink, and meet channel idle
In the case of condition, busy channel sends downlink data.Here channel occupancy is not confined to above-mentioned sub-frame of uplink
Remaining time in, but the sub-frame of uplink subframe being originally used for downlink transfer below can be continued until
On.
As shown in Figure 6, it is still assumed that the cycle of subframe distribution is 9 subframes, and rear the 3 of each cycle are assumed
Individual subframe may be used for uplink.Use this method, it is assumed that sub-frame of uplink set 701 is actually used in up
Transmission, so follow-up downlink transfer resource just can only start after sub-frame of uplink terminates, i.e. sub-frame set
702；And to sub-frame of uplink 703, it is assumed here that the uplink of the semi-static UE of being assigned with in base station or scheduled
The uplink of UE, but be not detected by the uplink of any UE, then can appoint confirming not receive
What, after the uplink of UE, begin attempt in advance carry out downlink transfer 704.Here, base station can be to upper
Signal in row subframe carries out energy measuring, or judges the most up by the energy of detection DMRS sequence
Whether subframe exists the upward signal that UE sends.Use this method, when base station is currently without dispatching any UE
Uplink, or, when base station detect all of UE all do not have according to its scheduling send uplink
Time, can reuse and carry out downlink transfer in these sub-frame of uplink resources, thus make full use of channel resource.
Embodiment three
The present embodiment describes improved procedure based on FBE.The method of the present embodiment can apply to downlink transfer and
Uplink, below with the up example that is transmitted as, the mode of description competitive channel resource.
To the uplink exempted from licensed band, it is assumed here that its working mechanism is, first base station sends UL
Grant dispatches the PUSCH of UE, or base station is semi-statically configured the uplink of UE；Then, UE is dividing
Detect channel before the sub-frame of uplink joined, such as, within the time of a TU, carry out Channel Detection, when detecting
The when of channel idle, UE just sends upward signal.That is, provide in base station dynamic dispatching or semi-static distribution
After source, the uplink signal transmissions of UE is strategy based on FBE.Assume the sub-frame of uplink position of neighbor cell
Being alignment, a defect of employing FBE is, if the up timing of the UE within the scope of is not
With, so upward signal of the UE that timing is forward will block the upward signal of timing UE rearward always.And
The inconsistent situation of this timing is likely occurred.This timing that can be to occur at neighbor cell is different
Step；Or there is multiple LTE operator in the range of one, but the nonsynchronous feelings of the timing of different operators
Condition.
To FBE, the CCA detection of its regulation is periodically to perform on some times.But, because
LTE system supports the mechanism of up timing adjustment, i.e. the up timing of UE is controlled by base station, so UE needs
Timer command according to base station adjusts the transmission timing of its upward signal.So, when application FBE is to LTE system
On, UE is to carry out CCA detection before the timing sending upward signal of base station instruction.It is to say,
When LTE up direction carrys out work according to FBE, its moment performing CCA detection is generally not periodically, and
The timer command being to rely on base station is adjustable.
In order to avoid the UE that above-mentioned timing is forward often blocks timing UE rearward, and in view of in actual system
In system, to this asynchronous system, which UE timing which UE timing forward is uncertain rearward, this
Bright proposition, to a community, each time within the time period of uplink, jumps according to certain rule
Become the actual beginning timing sending upward signal of UE, i.e. within the different time periods for uplink, actual
The timing that starts sending upward signal can be different.Here, a uplink of a community is being determined
Timing after, remain hypothesis UE have only to up start timing before, the time period of such as TU carries out letter
Road detects, as long as channel idle, UE just can send upward signal；Whereas if channel busy, then UE is not
Current ascending resource can be taken.The saltus step rule of above-mentioned up timing is usually applied to all of community
UE, from but all UE of same community can send upward signal simultaneously.On an ascending resource,
When the up timing of a community is earlier, the UE of other communities can be had precedence over to send up letter
Number, it is achieved channel occupancy；And when comparing rearward when the up timing of a community, be equivalent to actively abandon letter
Road is special, thus allows the UE of the forward community of other up timings to send upward signal, it is achieved friendly altogether
Deposit.Or, it is assumed that the uplink of each community of same operator is to synchronize, and different operators
LTE community can be asynchronous, then can use all communities of same operator identical above-mentioned up
The saltus step rule of timing.
Three preferred example starting timing determining uplink each time are described below.
First method is, the method realized with base station controls the actual beginning timing sending upward signal of UE.
In existing LTE system, the up timing of UE is relative to the reception timing advance of its corresponding descending sub frame
(NTA+NTA offset)×Ts, wherein, NTAIt is the Timing Advance of configuration UE, NTA offsetBe one fixing inclined
Move, such as, to FDD system, NTA offset=0；And to TDD system, NTA offset=624.So, base is used
Stand realize method, based on existing Timing Advance computational methods (NTA+NTA offset)×Ts, by directly adjusting
NTAValue reach saltus step sub-frame of uplink start timing effect.It is to say, different for up biography
In the defeated time period, by differently configured NTAThe up letter of actual transmission is changed as aforesaid Timing Advance
Number beginning timing.According to method to FBE above, this method is to meet the requirement of FBE, because
In LTE system, the timing starting to send upward signal of FBE equipment is controlled by base station.Here, to all need
The UE of upward signal to be sent, before starting uplink, needs to be respectively adopted special signaling to adjust NTA
Value, thus signaling consumption is bigger.
Or, second method is, to a community, on different ascending resources, can be in directly configuration
The saltus step rule starting timing of row subframe, the UE of Ji Yige community can be from difference on different ascending resources
Timing position start to send upward signal.Here, in order to change the Timing Advance of the UE of a community,
Can be at above-mentioned Timing Advance (NTA+NTA offset)×TsOn the basis of, it is further added by another skew, is designated asThe up timing of i.e. UE is relative to the reception timing advance of its corresponding descending sub frameHere,Can with a length of unit of OFDM symbol, from
And on different ascending resources, in saltus stepAfter, although subframe start-stop timing is descending relative to corresponding
Subframe changes, but the timing of upgoing O FDM symbol is constant；Or,Can also be with
Less granularity, is designated as G us and carrys out saltus step, such as G length 20us equal to TU.
Value can be all nonnegative value, thus ensure UE actual uplink transmission timing relative to right
The descending sub frame answered always shifts to an earlier date, but concrete numerical value in advance can be different in each uplink.Adopt
Use this method, bigger GP can be reserved, thus allow to adjust sub-frame of uplink timing, and not affect follow-up
Descending sub frame.Or,Value can be all negative value, but delayed concrete numerical value is the most up
Transmission can be different.Use this method, if remained according to propagation delay to arrange TA, then UE
Actual uplink transmission timing be delayed relative to corresponding descending sub frame, at this moment need follow-up descending sub frame
Destroy its anterior OFDM symbol；Or, it is also possible to it is to realize, by base station, the TA that configuration is bigger, makes UE's
Actual uplink transmission timing actually remains in advance relative to corresponding descending sub frame, by reserved bigger
GP, can not affect follow-up descending sub frame.Or,Value both can be on the occasion of, it is also possible to be
0 or the actual uplink transmission timing of negative value, i.e. UE be sometimes advanced by relative to corresponding descending sub frame,
It is sometimes delayed, but in advance or delayed concrete numerical value can be different in each uplink.
Here it is possible to be to each community, produce it respectivelyHopping sequences, such as, community
PCID is as an initiation parameter of randomizer；Or, it is assumed that each community of same operator
Uplink be synchronize, then can be that all LTE cell configuration to an operator are same
Hopping sequences, and different to the LTE cell configuration of different operatorsHopping sequences.Use
Such method,Hopping sequences by some other parameter implicit difiinition, from without volume
Outer signaling consumption.The present invention is not intended toThe generation method of hopping sequences.Or, it is also possible to it is to draw
Enter the specific signaling in new community, when being used for configuring a uplink, need the parameter usedUpper
In the method in face,Can be that uplink all changes each time, or can also be every the most up biography
Defeated just change is onceThe method comparing the above-mentioned up timing of the first saltus step, this method needs each
UE sends occupied signaling respectively, thus reduces signaling consumption.
As shown in Figure 7, it is assumed here that up timing half OFDM symbol more delayed than community 1 of community 2, and
Assume hopping sequencesValue be all nonnegative value, and with an OFDM symbol as granularity.Pass through saltus step
During each ascending resourceMake the UE of different districts can be with preempting resources.At first time ascending resource
On, it is assumed here that community 1It is 2, and community 2It is 1, is not i.e. considering blocking-up phenomenon
Time, beginning timing 1.5 OFDM symbol delayed relative to community 1 of community 2, thus the UE of community 1
Upward signal can be sent；After once the UE of community 1 sends upward signal, its energy will block community 2
In the uplink of UE.On second time ascending resource, it is assumed here that community 1It is 0, and little
District 2Being 3, i.e. when not considering to block phenomenon, the beginning timing of community 2 is relative to community 1 in advance
2.5 OFDM symbol, thus the UE of community 2 can send upward signal；Once the UE of community 2 sends
After upward signal, its energy is by the uplink of the UE in blocking-up community 1.As it is shown in fig. 7, pass through saltus stepValue, can the UE preempting resources alternately of Shi Liangge community.
Or, the third method is, to a community, is held on row subframe timing constant, but by right
The punching of sub-frame of uplink beginning, changes the actual timing sending upward signal of UE.Different upper
In row resource, the time span of punching is saltus step, and the UE of Ji Yige community can be from different ascending resources
Different timing positions starts actual transmission upward signal.Here punching can be to connect with single-carrier frequency division multiple access
Entering (SCFDMA) symbol is most N number of SCFDMA symbol that unit destroys subframe beginning.Such as N
Less than or equal to 3, thus avoid destroying the DMRS symbol of subframe.Or, punching here may also mean that with
Less granularity, is designated as G us, destroys subframe anterior most M Gus, the such as G length equal to TU
20us.Preferably, the value of M ensures to avoid destroying the DMRS symbol of subframe.Here, when from the beginning of subframe
When the part destroyed is not complete SCFDMA symbol, UE needs to send filling signal until the next one is complete
The border of SCFDMA symbol, then starts to send upward signal.The effect of filling signal at least channel accounts for
With.Here it is possible to be to each community, produce the hopping sequences of its punching time span respectively, such as,
The PCID of community is as an initiation parameter of randomizer；Or, it is assumed that same operator
The uplink of each community is to synchronize, then can be that all LTE cell configuration to an operator are same
The hopping sequences of individual punching time span, and the punching time different to the LTE cell configuration of different operators
The hopping sequences of length.The present invention is not intended to the generation method of the hopping sequences of punching time span.Use so
Method, the hopping sequences of punching time span by some other parameter implicit difiinition, from without
Extra signaling consumption.The present invention is not intended to the generation method of the hopping sequences of punching time span.Or, also
The specific signaling in new community can be introduced into, when being used for configuring a uplink, need the punching time used
Length.In the above methods, punching time span can be that uplink all changes each time, or also may be used
Just to change, every repeatedly uplink, time span of once punching.Compare the above-mentioned up timing of the first saltus step
Method, this method needs each UE is sent occupied signaling respectively, thus reduces signaling consumption.
As shown in Figure 8, it is assumed here that the up timing half SCFDMA symbol more delayed than community 1 of community 2.
During ascending resource each by saltus step, the SCFDMA symbolic number of punching, makes the UE of different districts can seize money
Source.On first time ascending resource, it is assumed here that 2 SCFDMA symbols are destroyed in community 1, and 2 dozens, community
Falling 3 SCFDMA symbols, i.e. when not considering to block phenomenon, the beginning timing of community 2 is relative to community 1
Delayed 1.5 SCFDMA symbols, thus the UE of community 1 can send upward signal；Once community 1
After UE sends upward signal, its energy is by the uplink of the UE in blocking-up community 2.Up in second time
In resource, it is assumed here that 3 SCFDMA symbols are destroyed in community 1, and 0 SCFDMA is destroyed in community 2
Symbol, i.e. when not considering to block phenomenon, the beginning timing of community 2 is relative to 2.5 in advance, community 1
SCFDMA symbol, thus the UE of community 2 can send upward signal；Once in the UE transmission of community 2
After row signal, its energy is by the uplink of the UE in blocking-up community 1.As shown in Figure 8, beaten by saltus step
The method of the time span in hole, can the UE preempting resources alternately of Shi Liangge community.
Implementing of the method for the competitive channel resource in the above-mentioned the application of being.Present invention also provides competition
The equipment of channel resource, may be used for implementing said method.
Corresponding to the competitive channel resource allocation method of embodiment one, the equipment that the application provides includes: ECCA parameter
Determine unit, CCA detector unit and data transmission unit.
Wherein, ECCA parameter determination unit, for determining the parameter performing ECCA according to current frame structure.
CCA detector unit, is used for performing CCA, the channel status of detection faces licensed band, and according to ECCA's
Parameter determination notifies described data transmission unit when meeting channel idle condition.Data transmission unit, for connecing
The notice busy channel receiving CCA detector unit carries out data transmission.
Corresponding to the competitive channel resource allocation method of embodiment two, the equipment that the application provides includes: sub-frame of uplink is true
Cell, idle-detection unit and downlink transfer unit.
Wherein, sub-frame of uplink determines unit, allocates in advance for basis and determines in channel for uplink
Row subframe.Idle-detection unit, for determining the most unscheduled sub-frame of uplink or not detecting the up letter of behaviour
Number the sub-frame of uplink of scheduling, and notify that the sub-frame of uplink determined is used for downlink transfer by downlink transfer unit.
Corresponding to the competitive channel resource allocation method of embodiment three, the equipment that the application provides includes: start timing really
Cell, detection Channel Elements and transmission unit.
Start timing determination unit, for each time within the time period of assigned direction transmission, determining reality
Send the beginning timing of respective direction signal.Detection Channel Elements, for determining at beginning timing determination unit
Beginning timing before detect channel, and when channel idle notification transmission unit busy channel send signal.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all in the present invention
Spirit and principle within, any modification, equivalent substitution and improvement etc. done, should be included in the present invention protect
Within the scope of protecting.
Claims (22)
1. the method for a competitive channel resource, it is characterised in that described method includes:
Equipment determines the parameter performing ECCA according to current frame structure；
Described equipment performs CCA, and the channel status of licensed band is exempted from detection, and in the ginseng according to described ECCA
Number determines busy channel when meeting channel idle condition.
Method the most according to claim 1, it is characterised in that described equipment determines according to current frame structure
The parameter performing ECCA includes: according to current frame structure, described equipment determines that the maximum channel of current permission takies
Time, and the parameter of ECCA is adjusted according to this maximum channel holding time.
Method the most according to claim 1, it is characterised in that described determine execution according to current frame structure
The parameter of ECCA includes: before starting ECCA Channel Detection, and equipment determines the time wishing to take destination channel
Length T0, adjusts the parameter of ECCA, and is applied to the whole ECCA process before this channel occupancy according to T0
In.
Method the most according to claim 3, it is characterised in that to different types of downstream signal, described in set
Back-up does not determine its corresponding time span T0；Or, to channel occupancy each time, described equipment determines its phase respectively
Time span T0 answered.
Method the most according to claim 2, it is characterised in that the maximum channel that described basis currently allows
Holding time adjusts the parameter of ECCA and includes: described base station adjusts ECCA according to the smaller value in T0 and A
Parameter；Wherein, described A be from the moment of current detection channel to must interrupt next time channel occupancy time
Time span between quarter, described T0 is that before starting ECCA Channel Detection, equipment wishes that the time of busy channel is long
Degree.
Method the most according to claim 5, it is characterised in that described according to the smaller value in T0 and A
The parameter adjusting ECCA includes:
The value of q when determining every time detection channel status according to the smaller value in T0 and A；Determine current target
Random number NkFor Nk=ceil (N1·qk/q1), or, Nk=ceil (α qk), or Nk=ceil (Nk-1·qk/qk-1)；
Or,
Determine value q of q when previous detection channel statusk, from 1 to qkIn directly produce target random number Nk；
Wherein, q1Q when detecting channel status after interrupting equidirectional channel occupancy last time for the first time for described equipment
Value, N1For corresponding q1The target random number chosen, α ∈ (0,1) is corresponding initial target random number N1In (0,1)
In the range of random number, qk-1The q's that when revising the value of q for the described equipment last time, detection channel status uses
Value, Nk-1For corresponding qk-1The target random number chosen, qkFor q during described equipment current detection channel status
Value.
Method the most according to claim 6, it is characterised in that described channel idle condition is: currently count
Value X of number device is more than or equal to Nk。
8. the method for a competitive channel resource, it is characterised in that including:
On the channel exempting from licensed band, allocate the sub-frame of uplink for uplink in this channel in advance；
Described base station is by the most unscheduled described sub-frame of uplink or the institute of the scheduling being not detected by upward signal
State sub-frame of uplink, for downlink transfer.
Method the most according to claim 8, it is characterised in that described include for downlink transfer:
The Channel holding time of the downlink transfer before specifying sub-frame of uplink is extended to described appointment sub-frame of uplink
In；Or,
Described base station starts to perform described CCA detection on described appointment sub-frame of uplink, and meets channel described
Described transmission downlink data is utilized during idle condition busy channel；
Wherein, described appointment sub-frame of uplink is the most unscheduled described sub-frame of uplink or is not detected by up
The described sub-frame of uplink of the scheduling of signal.
10. the method for a competitive channel resource, it is characterised in that including:
Each time within the time period of assigned direction transmission, determine described equipment actual transmission respective direction letter
Number beginning timing；
Described equipment detected channel before described beginning regularly, if channel idle, described hold facility channel is sent out
The number of delivering letters；Otherwise, described equipment can not take when previous channel resource.
11. methods according to claim 10, it is characterised in that when described assigned direction is up direction
Time:
All UE in same community use identical described beginning timing；And/or,
All UE in all communities of same operator use identical described beginning timing.
12. methods according to claim 10, it is characterised in that described assigned direction is up direction,
The described beginning timing determining equipment includes:
Presetting timing slip sequence, described timing slip sequence is by the timing of corresponding different sub-frame of uplink resources
Deviant forms；
Described equipment determines when previous ascending resource and corresponding timing off-set value, and by upward signal
Initial time starts timing advance with the standard of TDD system or postpones the time of the timing off-set value determined.
13. methods according to claim 10, it is characterised in that when described assigned direction is up direction
Time, the described up beginning timing determining equipment includes: base station configures corresponding described sub-frame of uplink to described equipment
The Timing Advance N of resourceTA, described equipment is according to described (NTA+NTA offset)×TsDetermine that up beginning of equipment is determined
Time；Wherein, NTA offsetIt it is a constant offset set in advance.
14. methods according to claim 10, it is characterised in that when described assigned direction is up direction
Time, the described up beginning timing determining equipment includes: the up timing of UE is relative to its corresponding descending sub frame
Reception timing advanceWherein, NTAIt is to carry the time being allocated to described UE
Front amount, NTA offsetIt is a fixing skew,The timing corresponding to different sub-frame of uplink resource settings is inclined
Shifting value.
15. methods according to claim 14, it is characterised in that generate for community in advanceSequence
Row, each value in sequence is for representing corresponding subframeSide-play amount；Or,
By the parameter used during the specific signal deployment uplink of community
16. methods according to claim 10, it is characterised in that when described assigned direction is up direction
Time, the described up beginning timing determining equipment includes: to a community, be held on row subframe timing constant,
Is punched in the beginning of described sub-frame of uplink, change the actual timing sending upward signal of UE.
17. methods according to claim 16, it is characterised in that the punch operation that sub-frame of uplink is carried out
Support to destroy most 3 OFDM symbol that subframe is anterior.
18. methods according to claim 16, it is characterised in that described punch operation is with SCFDMA
Symbol is unit or carries out in units of G us；G is the positive integer set.
19. methods according to claim 16, it is characterised in that generate the punching time for community in advance long
The sequence of degree, each value in sequence is for representing the punching time span of corresponding assigned direction subframe；Or,
By the punching time span needing use during the uplink of specific signal deployment of community.
The equipment of 20. 1 kinds of competitive channel resources, it is characterised in that including: ECCA parameter determination unit,
CCA detector unit and data transmission unit；
Described ECCA parameter determination unit, for determining the parameter performing ECCA according to current frame structure；
Described CCA detector unit, is used for performing CCA, the channel status of detection faces licensed band, and in basis
The parameter determination of described ECCA notifies described data transmission unit when meeting channel idle condition；
Described data transmission unit, for receiving the notice busy channel number of described CCA detector unit
According to transmission.
The equipment of 21. 1 kinds of competitive channel resources, it is characterised in that including: sub-frame of uplink determines unit, free time
Detector unit and downlink transfer unit；
Described sub-frame of uplink determines unit, for according to allocating the up son determined in channel for uplink in advance
Frame；
Described idle-detection unit, for determining the most unscheduled sub-frame of uplink or not detecting behaviour's upward signal
The sub-frame of uplink of scheduling, and notify that the sub-frame of uplink determined is used for downlink transfer by described downlink transfer unit.
The equipment of 22. 1 kinds of competitive channel resources, it is characterised in that including: start timing determination unit, detection
Channel Elements and transmission unit；
Described beginning timing determination unit, for each time within the time period of assigned direction transmission, determining reality
Border sends the beginning timing of respective direction signal；
Described detection Channel Elements, for detection letter before starting the beginning timing that timing determination unit is determined
Road, and notify that when channel idle described transmission unit busy channel sends signal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510046778.0A CN105992222A (en) | 2015-01-29 | 2015-01-29 | Channel resource competition method and device |
| PCT/KR2016/000941 WO2016122228A1 (en) | 2015-01-29 | 2016-01-28 | Method and apparatus of contending for channel resources |
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| CN201510046778.0A CN105992222A (en) | 2015-01-29 | 2015-01-29 | Channel resource competition method and device |
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| WO (1) | WO2016122228A1 (en) |
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| CN110476464A (en) * | 2017-04-01 | 2019-11-19 | 华为技术有限公司 | A kind of uplink synchronisation method and device |
| CN111278152A (en) * | 2019-01-04 | 2020-06-12 | 维沃移动通信有限公司 | Channel occupying method, frame period indicating method, frame period determining method and equipment |
| CN111601392A (en) * | 2019-02-21 | 2020-08-28 | 华为技术有限公司 | Random access method and device |
| CN113067693A (en) * | 2018-08-09 | 2021-07-02 | Oppo广东移动通信有限公司 | Information transmission method, terminal equipment and network equipment |
| WO2023001078A1 (en) * | 2021-07-21 | 2023-01-26 | 中兴通讯股份有限公司 | Channel sharing method and device, and storage medium |
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| CN113596259B (en) * | 2021-07-09 | 2023-03-21 | 厦门亿联网络技术股份有限公司 | Communication method and device based on DECT |
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| US8666319B2 (en) * | 2011-07-15 | 2014-03-04 | Cisco Technology, Inc. | Mitigating effects of identified interference with adaptive CCA threshold |
| TW201345278A (en) * | 2012-01-26 | 2013-11-01 | Interdigital Patent Holdings | Dynamic parameter adjustment for LTE coexistence |
| US9723516B2 (en) * | 2013-05-20 | 2017-08-01 | Qualcomm Incorporated | Wireless feedback communications over unlicensed spectrum |
| US9674825B2 (en) * | 2013-07-17 | 2017-06-06 | Qualcomm Incorporated | LTE channel access over unlicensed bands |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110476464A (en) * | 2017-04-01 | 2019-11-19 | 华为技术有限公司 | A kind of uplink synchronisation method and device |
| CN110476464B (en) * | 2017-04-01 | 2021-06-22 | 华为技术有限公司 | Uplink synchronization method and device |
| CN113067693A (en) * | 2018-08-09 | 2021-07-02 | Oppo广东移动通信有限公司 | Information transmission method, terminal equipment and network equipment |
| CN113067693B (en) * | 2018-08-09 | 2022-12-13 | Oppo广东移动通信有限公司 | Information transmission method, terminal equipment and network equipment |
| US11877270B2 (en) | 2018-08-09 | 2024-01-16 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method for transmitting information, terminal device and network device |
| CN111278152A (en) * | 2019-01-04 | 2020-06-12 | 维沃移动通信有限公司 | Channel occupying method, frame period indicating method, frame period determining method and equipment |
| CN111278152B (en) * | 2019-01-04 | 2022-02-08 | 维沃移动通信有限公司 | Channel occupying method, frame period indicating method, frame period determining method and equipment |
| CN111601392A (en) * | 2019-02-21 | 2020-08-28 | 华为技术有限公司 | Random access method and device |
| CN111601392B (en) * | 2019-02-21 | 2022-12-27 | 华为技术有限公司 | Random access method and device |
| WO2023001078A1 (en) * | 2021-07-21 | 2023-01-26 | 中兴通讯股份有限公司 | Channel sharing method and device, and storage medium |
Also Published As
| Publication number | Publication date |
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| WO2016122228A1 (en) | 2016-08-04 |
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Application publication date: 20161005 |