CN106937395A - Send the method and dispatching device of uplink scheduling information for unlicensed frequency band - Google Patents
Send the method and dispatching device of uplink scheduling information for unlicensed frequency band Download PDFInfo
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- CN106937395A CN106937395A CN201511025266.2A CN201511025266A CN106937395A CN 106937395 A CN106937395 A CN 106937395A CN 201511025266 A CN201511025266 A CN 201511025266A CN 106937395 A CN106937395 A CN 106937395A
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- frequency band
- uplink scheduling
- scheduling information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
- H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
- H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/14—Spectrum sharing arrangements between different networks
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
Abstract
The present inventor is wished by least one embodiment of the invention, there is provided a kind of method and apparatus for sending the uplink scheduling information for belonging to unlicensed frequency band to user equipment from the network equipment.By implementing embodiments of the invention, user equipment will perform the uplink on unlicensed frequency band, uplink scheduling information must be obtained from network-side, and due to there may be stronger resource contention on unlicensed frequency band, if uplink scheduling information also sent via unlicensed frequency band, cannot ensure that the information can send in time.By turning to be sent by the more secure authorized frequency bands of resource, the timely transmission of uplink scheduling information is ensured, user equipment can as early as possible obtain the uplink on unlicensed frequency band needed for information, more effectively realize on unlicensed frequency band with other agreements such as Wi-Fi, Zigbee's coexists.
Description
Technical field
The present invention relates to the transmission of the uplink scheduling information in communication network, more particularly to authorizing frequency
Sent for unauthorized frequently to user equipment in band and unlicensed frequency band and the cordless communication network deposited
The method and dispatching device of the uplink scheduling information of band.
Background technology
LTE (Long Term Evolution, Long Term Evolution) is by 3GPP (The 3rd Generation
Partnership Project, third generation partner program) UMTS (Universal that organize to set up
Mobile Telecommunications System, conventional wireless communication systems) technical standard length
Phase evolution.LTE system introduces OFDM (Orthogonal Frequency Division
Multiplexing, OFDM) and MIMO (Multi-Input＆Multi-Output,
Multiple-input and multiple-output) etc. key technology, significantly increase spectrum efficiency and message transmission rate, and
Support various bandwidth distribution and global main flow 2G/3G frequency ranges and some newly-increased frequency ranges, thus frequency spectrum point
With more flexibly, power system capacity and covering are also obviously improved.
LTE-A (LTE-Advanced) is the evolution version of LTE, after having to LTE preferably
To compatibility.LTE-A employs carrier aggregation, coordinated multipoint transmission, relaying, heterogeneous network interference
Coordinate the key technologies such as enhancing, peak data rate, the peak value of wireless communication system can be greatly improved
Spectrum efficiency, cell mean spectral efficiency and cell boundary users performance, while can also improve whole
The networking efficiency of network, this causes that lte-a system turns into the main flow of Development of Wireless Communications in recent years.
With developing rapidly for intelligent movable equipment, the sharp increase of number of wireless users, high-resolution
The rapid emergence of media stream business so that growing frequency spectrum resource demand is limited with expensive
Contradiction between authorized frequency bands is increasingly highlighted.The pressure of mobile network is authorized to alleviate, using money
Challenge of the unauthorized frequency range of source relative abundance to tackle data volume high turns into a kind of thinking, each operation
Business is mitigated by disposing the systems such as Wi-Fi (high-fidelity wireless networking) on unlicensed frequency band
The burden of wireless network, so as to shunt wireless traffic by unlicensed frequency band.
On the one hand, technology improves the lifting that can bring mobile network property, on the other hand, seeks
Seeking more frequency spectrum resources can also lift mobile communication performance.Frequency spectrum resource in radio communication, just
It is the basic of decision wireless bandwidth as oil in the earth, frequency range is wider, transmission rate
Faster, throughput of system is bigger.However, the frequency spectrum resource for distributing to operator is very limited and height
Volume, operator makes full use of hard-won frequency spectrum resource with racking one's brains, but nonetheless also very
Difficulty meets growing user's request.At home in operator, the LTE frequency spectrums money of China Mobile
Source adds up to 130MHz, and CHINAUNICOM adds up to 90MHz, and China Telecom adds up to 100MHz, and
The unlicensed frequency band resource that Wi-Fi is deployed in, about 90MHz can use near 2.4GHz frequency ranges, 5GHz
There is as many as 900MHz near frequency range.It is enough to order about with respect to very abundant and free unlicensed frequency band
Operator, equipment vendor go actively to research and develop correlation technique and equipment.
LTE is deployed to unauthorized frequency range, it is complete using LTE air protocols in unauthorized frequency range
LTE on communication, i.e. unauthorized carrier wave, abbreviation LTE-U
(LTE Advanced in Unlicensed Spectrums).Using LTE-U technologies, can be with profit
With technologies such as centralized dispatching, interference coordination, self adaptation request retransmissions (HARQ), compared to Wi-Fi
Etc. access technology, LTE-U systems have more preferable robustness, can obtain spectrum efficiency higher,
Bigger coverage and more preferable Consumer's Experience is provided.At present, had many companies and
Research institution proposes to dispose LTE technologies, i.e. LTE-U in unauthorized frequency range to accelerate to 3GPP
The indoor transmissions of LTE.Main candidate scheme has：Auxiliary is authorized to access (LAA), dual link
(DC), unauthorized auxiliary accesses (Standalone) technology etc., and LTE-U is moved as the 5th generation
Dynamic communication system (5G) enhancing technology, has attracted mobile communication research worker in worldwide
Extensive concern.
But, not yet it is proposed that how to realize authorizing frequency range to be coexisted with unauthorized frequency range in field
When, the ascending resource scheduling in unauthorized frequency range how is solved, and how to ensure this scheduling
Success rate.
The content of the invention
In order to solve above mentioned problem of the prior art, the present inventor is wished by the present invention
At least one embodiment, there is provided it is a kind of by the network equipment (for example, base station (NodeB), drill
Enter base station (e-NodeB) or the higher network equipment) to user equipment (for example, mobile phone or its
Its wireless terminal) send belong to unlicensed band (for example, with Zigbee or Wi-Fi share
Frequency band) uplink scheduling information method and apparatus.
At least one embodiment according to the first aspect of the invention, there is provided one kind is in authorized frequency bands
In the cordless communication network coexisted with unlicensed frequency band, being sent to user equipment from the network equipment is used for
The method of the uplink scheduling information of the unlicensed frequency band, it is characterised in that comprise the following steps：
The network equipment is sent for the unauthorized via the authorized frequency bands to the user equipment
The uplink scheduling information of frequency band.
Further, the network equipment and the user equipment work on the unlicensed frequency band
Under time division duplex (TDD) pattern.
Further, the method can also include such step, and the network equipment sets to the user
Preparation send configuration information, the configuration information to indicate the uplink scheduling letter that the network equipment sends
In time domain between the uplink that breath and the user equipment are carried out based on the uplink scheduling information
Corresponding relation.
Further, the transmission of uplink scheduling information is than the up biography corresponding to the uplink scheduling information
At least 4 subframes of defeated morning.
Further, the transmission of uplink scheduling information is than the up biography corresponding to the uplink scheduling information
At most 7 subframes of defeated morning.
At least one embodiment according to the second aspect of the invention, there is provided one kind is in authorized frequency bands
In the system coexisted with unlicensed frequency band, sent to user equipment from the network equipment and do not awarded for described
Weigh the dispatching device of the uplink scheduling information of frequency band, it is characterised in that the dispatching device is configured to,
Sent for the described of the unlicensed frequency band to the user equipment via the authorized frequency bands
Row schedule information.
Further, the network equipment works with the user equipment on the unlicensed frequency band
Under TDD mode.
Further, the dispatching device can also include：Transmitting element, is configured to the user
Equipment send configuration information, the configuration information indicates the uplink scheduling that the network equipment sends
Information and the user equipment be based between the uplink that the uplink scheduling information is carried out when
The corresponding relation in domain.
Further, the transmission of uplink scheduling information is than the up biography corresponding to the uplink scheduling information
At least 4 subframes of defeated morning.
Further, the transmission of uplink scheduling information is than the up biography corresponding to the uplink scheduling information
At most 7 subframes of defeated morning.
Further, the authorized frequency bands include the frequency band LTE based on following any network technology,
LTE-A, or GSM.
Further, the unlicensed frequency band includes the frequency band based on following any network technology：
Zigbee or Wi-Fi.
At least one embodiment according to the third aspect of the invention we, there is provided one kind is in authorized frequency bands
The network equipment in the system coexisted with unlicensed frequency band, it includes foregoing any dispatching device.
By implementing embodiments of the invention, user equipment will perform the up biography on unlicensed frequency band
It is defeated (including but not limited to：The information of voice, video, word or any data service), must
Uplink scheduling information must be obtained from network-side, and it is stronger due to be there may be on unlicensed frequency band
Resource contention, if uplink scheduling information also sent via unlicensed frequency band, cannot ensure this
Information can send in time.By turning to be sent by the more secure authorized frequency bands of resource, up tune
The timely transmission of degree information is ensured that user equipment can as early as possible obtain the up of unlicensed frequency band
Information needed for transmission, more effectively realizes such as LTE, LTE-A network in unlicensed frequency band
Upper and other networks, agreement such as Zigbee's, Wi-Fi etc. coexists.Above-mentioned method and apparatus are outstanding
It is directed to the following and other problems that LTE-U is faced：
1., in unauthorized frequency range, start at PUSCH (Physical Uplink Shared Channel) in user equipment
On carry out uplink before, it is necessary to observe LBT (Listen Before Talk) rule (for example,
Japan and Europe).But, LBT is that (including but not limited to, base station sends up uplink scheduling
Schedule information) it is provided with some limitations.
If 2. using (self-carrier-scheduling) is dispatched from carrier wave, that is, in this frequency band
Interior transmission uplink scheduling information, for the uplink in this frequency band, it is desirable to which base station and UE (are used
Family equipment) resource contention must be carried out using the equipment of the frequency band, agreement with other, rob in advance
Resource for sending uplink scheduling information and corresponding uplink.However, regrettably,
On unlicensed frequency band, the competition of this resource has certain uncertainty, and this causes base station even
The transmission of uplink transmission information all it cannot be guaranteed that, also so reduce UE can be by PUSCH
Carry out the possibility of uplink.
3. the configuration of main carrier (Primary Cell, referred to as " PCell ") and subcarrier (Secondary
Cell, referred to as " SCell ") configuring often different in time domain, this is up to how to carry out
The transmission of schedule information brings challenge.
Brief description of the drawings
In order to describe to obtain the method for foregoing and other advantages of the present invention and feature, device, network/
User equipment, by the diagram in below with reference to specific embodiment and accompanying drawing come each to what is be briefly described above
Individual aspect carries out more literary detailed description.It should be appreciated that the simply present invention described by these pictures
Exemplary embodiments, therefore be not considered as limiting the scope of the present invention.
Fig. 1 shows the division schematic diagram of the unauthorized frequency range in LTE-U；
Fig. 2 be LTE-U in carrier aggregation schematic diagram, will also authorize carrier wave (frequency band) with
Unlicensed frequency band is polymerized；
Fig. 3 is the system coexisted in authorized frequency bands and unlicensed frequency band according to embodiments of the invention
In, the method for sending the uplink scheduling information for unlicensed frequency band to user equipment from the network equipment
Flow chart；
Fig. 4 is the system coexisted in authorized frequency bands and unlicensed frequency band according to embodiments of the invention
In, the tune of the uplink scheduling information for unlicensed frequency band is sent to user equipment in the network device
Spend the block diagram of device；
Fig. 5 is according to embodiments of the invention under certain concrete configuration, to be sent on main carrier
Uplink scheduling information for the uplink on subcarrier and the main carrier corresponding to it, secondary load
Corresponding relation of the ripple in time domain.
Same or analogous reference represents identical or corresponding step, device, list in accompanying drawing
Unit or other modules.
Specific embodiment
Compared with Wi-Fi, LTE is deployed in unauthorized frequency range tool to have great advantage：From user perspective
See, LTE-U joint LTE will provide for the data rate of user Geng Gao, more preferable covering performance,
Reliability higher, this certainly would is that a kind of perfect Consumer's Experience；From mobile operator
Angle sees that core net runs on mandate and unauthorized frequency range simultaneously, and this will be quite convenient for mobile network
Operation management with upgrading.Next, introduce first the Frequency Band Selection of LTE-U, Channel Sharing,
The general principle such as access way and scene deployment.
Unauthorized Frequency Band Selection select permeability
Select suitable unauthorized frequency range deployment LTE-U and be it is contemplated that matter of utmost importance, it is low first
Path fading can be preferably resisted in 6GHz frequency ranges, by Wi-Fi and indigo plant near 2.4GHz
The intensive occupancy of the access technologies such as tooth, 5GHz frequency ranges are nearby taken by WLAN, are best suitable for deployment
The frequency range of LTE-U is 5-6GHz, especially near the frequency range of 6GHz.Countries in the world man/area
Unlicensed frequency band situation is shown in Table 0：
Unlicensed frequency band near the 5GHz of table 0.
Table 0 summarizes worldwide several emphasis countries for the unauthorized near 5GHz frequently
The occupancy situation of band, under comprehensive consideration, in China, disposes the first-selected unauthorized frequency range of LTE-U
It is probably 5725-5825MHz, and 5470-5725MHz frequency ranges.
Frequency spectrum justice uses problem
A. coexisting between different access technologies
The matter of utmost importance that LTE-U faces when 5GHz unauthorizeds frequency range is disposed is exactly with other accesses
The coexistence problems of technology, LTE-U realizes unauthorized with existing access technology (such as Wi-Fi systems)
The fair use of frequency range is the premise that the two coexists.
Current LTE system is continuously transmitted, exclusive use authorized frequency bands, and not with its
His operator and wireless access technology share spectrum resources, but unlicensed frequency band is open money
Source, it is allowed to which any wireless access technology is used, if LTE is left intact directly to take do not awarded
Power band resource, can run counter to the laws and regulations requirement that unauthorized frequency range is used, to being deployed in unauthorized frequency range
Other wireless access systems be inequitable.LTE-U can (carrier wave induction be certainly using CSAT
Adapt to transmission) technology with the access technologies such as Wi-Fi share available channel.
B. coexisting between different operators
It is well known that unauthorized frequency range is open access frequency spectrum resource, as long as being operated in unauthorized
Wireless device in frequency range meets the pertinent regulations in country or region, needs not move through certification, user's end
End or equipment just can be used unauthorized frequency range, it means that unauthorized frequency range does not limit the class of operator
Type and quantity, may be simultaneously present the feelings that many RAT systems take in the same area unauthorized frequency range
Condition, if LTE-U is deployed in into unauthorized frequency range, then be accomplished by consider different operators it
Between friendly coexistence problems.
In the deployment of LTE-U, unauthorized frequency range can be allocated to different operators by frequency range,
Joint division can also be carried out according to time and frequency range.As shown in Figure 1.Can will not according to frequency range
Authorized frequency bands carry out temporal permanent division, give different operators, this division methods letter
It is single easy, but the utilization rate of frequency spectrum is not high；In addition can according to the service conditions of different operators,
Joint unlicensed frequency band resource carried out on time and frequency range is divided, this dividing mode complexity
Higher than former mode, but it is obtained in that the availability of frequency spectrum higher.
LTE-U access ways
LTE-U may be selected different access ways, and such as LAA (authorizes auxiliary to access), LAA
It is a kind of frequency spectrum operational version realized and authorize frequency range efficiently to be shared with unauthorized frequency range, using carrier wave
Polymerization (CA) technology, be polymerized authorized frequency bands and unlicensed frequency band, as shown in Figure 2.
Authorize frequency range to transmit key message and guaranteed qos as main carrier unit (PCC), do not award
Power frequency range can be configured to descending supplement link or uplink and downlink as secondary carrier unit (SCC)
Link, there is provided extra Radio Resource.From Figure 2 it can be seen that unlicensed frequency band resource is by base station set
Dispatching distribution, unauthorized is operated by the activation/deactivation of media access control (MAC) unit
Using and discharging for frequency band, dynamically uses resource.Using LAA, when LAA base station activations not
During authorized frequency bands resource, LTE transmits cellular data on this unlicensed frequency band；When LAA base stations
When deactivating unlicensed frequency band resource, other access systems such as Wi-Fi just can be using unauthorized frequently
Band resource, so as to realize that each access technology flexibly uses the purpose of unlicensed frequency band.
Scene is disposed
LTE-U can be using two kinds of different scene deployment, i.e. operator's management and dependent deployment.
LTE-U is accessed by outdoor setting small base station, being completed by operator, and this is with Wi-Fi etc.
Access technology is independently completed to access difference by user.Additionally, LTE-U can use framework of building together,
Same base station is shared with LTE, which can substantially reduce the framework cost of LTE-U and run into
This；Non-co- building structure can also be used, the LTE-U of enough numbers is built in LTE macrocells
Microcell base station.
Evolution result as LTE system on unlicensed frequency band, LTE-U will inherit LTE
Many advanced technologies of system.Meanwhile, in order to other run on unlicensed frequency band with existing lead to
Letter system realizes Channel Sharing, and LTE-U will introduce the Channel Sharing strategy of oneself uniqueness.Specifically
It is described below：
Centralized dispatching technology
LTE-U used the Radio Resource such as the technology of centralized dispatching, i.e. time, space, frequency spectrum by
Centralized distribution is controlled in base station set, without competitive resource between terminal.The concentration used with LTE-U
Scheduling conversely, Wi-Fi employs preemption scheduling technology, in the case where service user number is less,
The dispatching technique can embody its superiority, but when number of users exceedes the ability that base station can service
Afterwards, due to cannot simultaneously respond the request of these users, just it is possible that server crash
Consequence；Meanwhile, with the frequent generation that also results in collision phenomenon of increasing of service user, cause
The level of resources utilization is substantially reduced.
This series of scheduling problem for Wi-Fi technology, LTE-U as a result of centralized dispatching,
So in the absence of the phenomenon of data collision, this will effectively avoid the waste of resource；For with
The intensive area in family, in order to lift the service ability of LTE-U base stations, we can be by increasing base
Stand to share the load of single base station.Compared with Wi-Fi, in terms of dispatching technique, LTE-U
There has been obvious advantage.
ICIC (interference coordination) technology
ICIC (interference coordination) technology in LTE-U systems be mainly by system resource (when
Frequency resource, power etc.) limited and coordinated, according to the concrete condition of different user, reasonably
The distribution of Resource Block and power is carried out, the purpose of interference coordination between neighbor cell has been reached.
Specifically, in order to increase the capacity of cell edge, we employ frequency to ICIC technologies
The method of multiplexing, frequency duplex factor as one elects 3 as in LTE-U systems.Employed not between neighbor cell
With frequency range, such that it is able to avoid adjacent cell frequencies well between disturb.In order to further limit
Inter-cell interference, base station is notified under its neighbor cell by transmission power instruction (RNTP)
Row disturbed condition, neighbor cell base station can be according to disturbed condition come further after indication signal is received
Adjustment its own transmission power.
In LTE macrocells, in order to lift cell edge service quality, LTE-U systems are used
EICIC strategies.The principle of the program be one or more sub-frame configurations be empty frame (ABS),
This kind of ABS subframes are provided exclusively for the UE at Microcell, picocell, home base station cells edge
Service, so as to effectively avoid the main interference from macrocell, can effectively lift cell edge
The service speed of UE.
And in Wi-Fi systems, AP is robbed after accounting for resource and taken whole frequency spectrum resources, so as to not have
There is method to be coordinated in frequency.Although AP can in time carry out resource coordination, by
In there is a problem of competition and retract, the waste of system resource can be caused.
Adaptive retransmission asks (HARQ) technology
Using adaptive retransmission request technology, staggered the time when physical layer data block is passed, LTE-U receiving terminals
Will not abandon and pass wrong data block, and the arrival of the data block of re-transmission can be waited.Receiving terminal is being received
Operation can be merged after to the data block for retransmitting.
HARQ technologies can effectively utilize before transmission energy so that improve energy efficiency and
Transmission success rate.Compared with the strategy for directly abandoning error block in Wi-Fi systems, LTE-U
It is even better in energy efficiency with transmission success rate.
CA (carrier aggregation) technology
Commercial LTE network originates in Cat3 and Cat4, originally LTE and unused CA (carrier waves
Polymerization) technology.With the application of CA technologies, the capacity of LTE system has obtained lifting at double,
This undoubtedly will bring good data service experience to user.
In Cat4 originally, LTE used 20MHz continuous frequency spectrums, by 2013
During CA technologies appear in LTE system for the first time, the poly- of two 10MHz frequency spectrums is realized first
Close, afterwards by continuing to develop evolution, the frequency band being polymerized using CA technologies is more and more wider, make be
The growth year by year at double of the capacity of system.
In frequency spectrum resource rare today, to realize the efficient utilization of frequency spectrum resource, run on and do not award
LTE-U systems on power frequency band will equally use CA technologies.Specifically, LTE-U can be with
Authorized frequency bands as main carrier (PCell), terminal can be set up into nothing with base station on authorized frequency bands
Line resources control is connected, and the unlicensed frequency band resource of current idle is obtained by carrier sense, so that
The transmission of data can be used for as subcarrier.Correspondingly, unlicensed frequency band can serve as
Subcarrier (SCell).
Channel Sharing strategy
LTE-U is run on unlicensed frequency band the situation of channel confliction will occurs with Wi-Fi systems,
To solve this problem, LTE-U will be using the strategy of various Channel Sharings.At present, by
The solution of proposition has LBT, CSAT, DFS, TPC.
In the cell of Wi-Fi and LTE-U dense deployments, LTE-U systems possibly cannot be detected
Idle channel, in this case, LTE-U can be by CSAT (carrier sense self adaptations
Transmission) technology realizes Wi-Fi the or LTE-U Channel Sharings with same cell and neighbor cell.
For CSAT mechanism, a transmission cycle is which defined, in this cycle period,
LTE-U is only spaced the transmission for carrying out data with portion of time, wherein transmission is performed stopping with transmission
Dutycycle be to be determined by the active level of other Transmission systems in cell, so can ensure that
Shared and service the quality of channel.
For example, during downlink transmission, carrier sense is carried out by base station end, ensuring not
In the case of authorizing the frequency range free time, base station can just carry out the transmission of data using it；It is similar,
Unauthorized frequency range intercepts work and can be completed by user terminal in up-link.
LTE-U has continued a series of advantage technologies in LTE standard, and this is the lifting of systematic function
Solid backing is done.It is very ripe with ecodistrict in the carrier aggregation technology of LTE system
Today, this causes to dispose LTE-U systems in Microcell, and realizes poly- with authorized frequency bands
Synthesize possibility.Due to most of unlicensed frequency band versatility worldwide, this will make
The technology is obtained to be more easy to promote.Meanwhile, LTE-U supports to provide service for quick mobile user, and
And the seamless access of minizone, in these areas, the access on other unlicensed frequency bands can be realized
Technology is all incomparable.
More and more intensive with wireless network deployment, the interference between various systems will become all the more
Seriously, interference coordination will turn into one of key of system for restricting performance boost.Due to LTE-U clothes
Business will be provided by operator, and compared with the access technologies such as Wi-Fi, interference coordination will be easy
A lot.On the basis of interference coordination, LTE-U combine centralized dispatching technology, CA, HARQ,
Safeguards system is all obtained spectrum efficiency higher by QoS guarantee technology, these advantages, and bigger is
System capacity, so as to bring more preferable Consumer's Experience.
In terms of LTE-U network designs, existing LTE equipment can be made full use of, certainly,
It is also required to carry out certain modification to LTE air interface protocols, so that LTE can be smooth
Operate on unlicensed frequency band, this would is that a selection for wisdom for runing reduces cost,
Huge being benefited will be also obtained for user.
On LTE-U with other agreements coexisting in unauthorized frequency range, reading each reality of the invention
Apply outside the explanation of example, can also be with further reference to：Qualcomm Research–LTE in
Unlicensed Spectrum:Harmonious Coexistence with Wi-Fi, June 2014 (
Claim " LTE-Unlicensed-Coexistence-Whitepaper ").
Next, by embodiments of the invention, introducing one kind in authorized frequency bands and unlicensed frequency band
In the system for coexisting, from the network equipment (for example, base station) to user equipment (for example, mobile phone)
The method for sending the uplink scheduling information for unlicensed frequency band.Reference picture 3, illustrated therein is this
The flow chart of method.
First, in step s 30, to user equipment send configuration information, configuration information refers to for base station
Shown uplink scheduling information and user equipment that base station sends based on uplink scheduling information carry out it is upper
Time domain corresponding relation between row transmission, for example, base station can indicate in this step, using table
No. 0 configuration of main carrier shown in 1, and such as subcarrier therein No. 1 configuration,
Then, user equipment will be appreciated that base station will pass through in the 1st and the 6th of each frame the subframe
Uplink scheduling information is sent by the first wireless network, the schedule information is used for the user equipment second
Uplink in wireless network, and this uplink should occur uplink scheduling information send
6 afterwards or 7 subframes.Again for example, base station can indicate the of main carrier as shown in table 3
No. 2 configurations, and No. 2 of such as subcarrier therein configuration, then, user equipment will
Know, base station sends uplink scheduling information, the scheduling in No. 3 of each frame and the 8th work song frame
Information is respectively used to dispatch on PUSCH the uplink of late 4 subframes of transmission than schedule information.
It should be noted that step S30 is an optional step, in a change case, user equipment is pre-
First statically or quasistatic ground stores above-mentioned required map information, that is, it is known that in advance
Base station and the main carrier and/or the configuration information of subcarrier that are used between it, understand on main carrier
The corresponding relation between time-domain resource in time-domain resource and subcarrier.For example, prestoring such as Fig. 5
Shown mapping relations, or the content of any form in table 1- tables 8 has been prestored, and according to
Its content and the uplink scheduling information that receives run the uplink of itself.
In step s 32, the network equipment is sent for unauthorized via authorized frequency bands to user equipment
The uplink scheduling information of frequency band.For example, it is possible to use DCI (Downlink Control Information) passes through
PDCCH (Physical Downlink Control Channel) sends the uplink scheduling information, of course, if required,
Existing DCI format can be adjusted to adapt to the multiple carrier wave (examples corresponding to a UE
Such as, mandate and unauthorized), it is carried multiple carrier waves for example, lengthening existing DCI
Relevant information, or, the relevant information of different carrier waves can be respectively carried with multiple DCI information,
For example, the respective uplink scheduling information of each carrier wave.Specifically, it is referred to Fig. 5 furtherly
It is bright.
Fig. 5 shown in the presence of step S30 or the configuration for prestoring, then through in step S32
Uplink scheduling information is sent, a kind of mapping of the main carrier to be realized with subcarrier in time domain is closed
System.It is also that refinement on the 1st kind of configuration of subcarrier in table 3 is represented.It can be seen that in main carrier
In adjacent sub-frame, the method for salary distribution of resource is circulated by a unit of D-S-U-D-D in time domain,
Wherein D represents descending, and S represents Special, and it is mainly used in up-downgoing switching, and U represents up
0 work song frame of (user equipment carries out uplink in the burst), i.e. the first frame is used for descending
Transmission (control signaling or business datum), 1 work song frame of the first frame is S subframes, then, 2
Work song frame is sub-frame of uplink, and 3-4 work songs frame is descending sub frame, and 5 work song frames are next D-S-U-D-D
Circulation beginning, repeat no more.
Specifically, No. 0 configuration according to main carrier, No. 1 configuration of subcarrier, such as Fig. 5
It is shown, in No. 8 and the 9th work song frame of each frame (length is limited and only shows the first frame in figure),
Uplink scheduling information is sent, for uplink of the UE after 4 subframes, such as in the first frame
In send after, the uplink scheduling information institute actual schedule is the 2nd work song frame of the second frame (with
8th subframe of one frame is separated by 4 subframes) and the 3rd work song frame (the 9th subframe phase with the first frame
Every 4 subframes) in the uplink carried out with unlicensed frequency band.And at No. 3 of each frame
Also it is second wireless network transmission uplink scheduling information with the 4th work song frame, and its specific scheduling
It is that user equipment is in after 4 subframes, namely on the 7th and the 8th work song frame of same frame
Uplink in two wireless networks.
Thus can also further illustrate, in an embodiment of the present invention, the transmission step of step S32
Suddenly include：Via authorized frequency bands, the uplink scheduling information of unlicensed frequency band is sent to user equipment.
In addition, by upper example it can also be seen that embodiments in accordance with the present invention, the first wireless network with
Second wireless network is operated under TDD mode.
Without loss of generality, for the requirement of the standard of catering to, it is up tune in embodiment that can make
The transmission of degree information is than (corresponding in other words) uplink scheduled in the uplink scheduling information
Early at least 4 subframes, in the example shown in Fig. 5, this time interval is just 4 subframes.
Without loss of generality, if standard needs, the transmission of uplink scheduling information can be set than being somebody's turn to do
Early at most 7 subframes of (corresponding in other words) uplink scheduled in uplink scheduling information.
By the reading to table 1- tables 8 and corresponding word, it will there is more intuitively understanding.But this area skill
Art personnel understand, these limitations are intended merely to fit when necessary the requirement of standard, rather than this hair
Itself limitation of bright protection domain, the present invention does not force the upper limit or lower limit of this time interval.
Table 1- tables 8 list the adducible various examples of inventor, wherein, each form pair
In a kind of configuration mode of main carrier, and 7 kinds of subcarrier should be respectively illustrated in each form
Configuration, therefore, according to different embodiments, there are about 56 kinds of combinations.By step S32 with
The different information content of optional step S30, you can realized wherein on base station and user equipment
Certain combination.
By taking table 1 as an example, it illustrates No. 0 configuration mode of main carrier, and corresponding pair
The totally 7 kinds of configurations of No. 0-6 of carrier wave, below, a kind of combination are referred to " configuration [x, y] ", wherein,
X is 1-8, represents the corresponding a kind of main carrier configuration in form 1-8, and y is 0-6, is represented
Corresponding a kind of configuration of subcarrier.
Table 1:The of main carrier0Number configuration mode
(uplink that the schedule information that the n-th work song frame sends is used in+the k of subcarrier n-th subframe)
In configuration combination [1,0] of table 1,0th, 1,5,6 work song frame of the base station in each frame
Uplink transmission information is sent, 4 subframes after being respectively used to dispatch, 6 or 7 subframes, 4 subframes,
And 6 or 7 subframe PUSCH uplink.Similarly, table 1 configuration combine [1,
1] in, base station sends uplink scheduling and believes on the 1st and the 6th work song frame of every frame via authorized frequency bands
Breath, it is respectively used to dispatch the uplink after 6/7 subframe on unlicensed frequency band.
Table 2:The of main carrier1Number configuration mode
(uplink that the schedule information that the n-th work song frame sends is used in+the k of subcarrier n-th subframe)
Table 3:The of main carrier2Number configuration mode
(uplink that the schedule information that the n-th work song frame sends is used in+the k of subcarrier n-th subframe)
Table 4:The of main carrier3Number configuration mode
(uplink that the schedule information that the n-th work song frame sends is used in+the k of subcarrier n-th subframe)
Table 5:The of main carrier4Number configuration mode
(uplink that the schedule information that the n-th work song frame sends is used in+the k of subcarrier n-th subframe)
Table 6:The of main carrier5Number configuration mode
(uplink that the schedule information that the n-th work song frame sends is used in+the k of subcarrier n-th subframe)
Table 7:The of main carrier6One of number configuration mode
(uplink that the schedule information that the n-th work song frame sends is used in+the k of subcarrier n-th subframe)
Table 8:The of main carrier6The two of number configuration mode
(uplink that the schedule information that the n-th work song frame sends is used in+the k of subcarrier n-th subframe)
For the configuration 0-1 of subcarrier, 3-4 and No. 6, it would however also be possible to employ in the following manner, that is,
In the case of 5 milliseconds or 10 milliseconds of change-over period, the quantity of the descending sub frame of main carrier is few
The quantity of the sub-frame of uplink in subcarrier, thus it is possible to support the scheduling of multiple subcarriers.Example
Such as, in LTE standard, it is possible to use the upper line index (UL in PDCCH or EPDCCH
Index) uplink scheduling information bag is supported.If up the highest significant position (MSB) in index
Subframe n is located at least significant bit (LSB), then UE will be at subframe n+7 and n+k (such as k=4)
Upper to perform corresponding uplink, otherwise, UE only will perform uplink on subframe n+k.
Wherein, the dispatch delay shown in table 8 is slightly less than the example of table 7.
If being configured with eIMTA in main carrier, the instruction sent in step S30 is perhaps desirable
's.In order to complete the instruction, it is possible to use bitmap (bitmap) and 3- bit identifications, for
The distinctive RNC signalings of UE：
- ten bit maps (10 subframes in one frame of correspondence)：" 1 " represents sub-frame of uplink.It is right
Configured in No. 0, for example：" 0011100111 ", that is, No. 0-9 in totally 10 subframes,
2-4 and 7-9 work songs frame are sub-frame of uplink, and remaining is S subframes or descending sub frame.
- three bit identifications：" 000 " represents that " 001 " represents configuration 1 ..., " 101 " table with setting to 0
Show configuration 7.The numbering that remaining value can give over to the new configuration for introducing from now on is used.
Fig. 4 be according to embodiments of the invention authorized frequency bands and unlicensed frequency band coexist it is wireless
In network, sent to user equipment (such as mobile phone) in the network equipment (such as base station 4) and used
In the block diagram of the dispatching device 40 of the uplink scheduling information of the unlicensed frequency band.Dispatching device 40
It is configured to, the uplink scheduling for the unlicensed frequency band is sent to user equipment via authorized frequency bands
Information.
Preferably, the network equipment is operated in the time-division with user equipment on the unlicensed frequency band
Under dual-mode.
Preferably, dispatching device 40 can also include transmitting element 400, and transmitting element 400 is configured
It is that, to the user equipment send configuration information, configuration information indicates the up tune of the transmission of base station 4
In time domain between the uplink that degree information and user equipment are carried out based on the uplink scheduling information
Corresponding relation.
Preferably, the transmission of uplink scheduling information is than the uplink corresponding to the uplink scheduling information
Early at least 4 subframes.
Preferably, the transmission of uplink scheduling information is more early than uplink corresponding to the uplink scheduling information
At most 7 subframes.
Without loss of generality, authorized frequency bands include the frequency band based on following any network technology：LTE
Network, LTE-A network, or GSM network.
Without loss of generality, unlicensed frequency band includes the frequency band based on following any network technology：
Zigbee or Wi-Fi.
In several embodiments provided by the present invention, it should be understood that disclosed system and side
Method, can realize by another way.For example, system embodiment described above is only
Schematically, it is actual for example, the division of each functional unit, can be only division of logic function
There can be other dividing mode when realizing.
It is described as separating component illustrate unit can be or may not be it is physically separate,
The part shown as unit can be or may not be physical location, you can with positioned at one
Place, or can also be distributed on multiple NEs.It can according to the actual needs be selected
In some or all of unit realize the purpose of this embodiment scheme.
In addition, each functional unit in each embodiment of the invention can be integrated in a treatment list
In unit, or unit is individually physically present, it is also possible to two or more unit collection
Into in a unit.Above-mentioned integrated unit can both be realized in the form of hardware, it is also possible to
Realized in the form of hardware plus SFU software functional unit.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements done etc.,
Should be included within the scope of protection of the invention.
Claims (15)
1. a kind of in the cordless communication network that authorized frequency bands and unlicensed frequency band coexist, set by network
The method that standby (4) send the uplink scheduling information for the unlicensed frequency band to user equipment,
It is characterised in that it includes following steps：
The network equipment sends (S32) for institute via the authorized frequency bands to the user equipment
State the uplink scheduling information of unlicensed frequency band.
2. method according to claim 1, it is characterised in that the network equipment with it is described
User equipment is at least operated under TDD mode on the unlicensed frequency band.
3. method according to claim 1, it is characterised in that also include：
B. the network equipment sends (S30) configuration information, the configuration to the user equipment
The uplink scheduling information that information indicates the network equipment transmission is based on institute with the user equipment
State the corresponding relation in time domain between the uplink that uplink scheduling information is carried out.
4. the method according to claim 1 or 4, it is characterised in that the uplink scheduling letter
The transmission of breath is than early at least 4 subframes of uplink corresponding to the uplink scheduling information.
5. method according to claim 5, it is characterised in that the uplink scheduling information
Send than early at most 7 subframes of uplink corresponding to the uplink scheduling information.
6. method according to any one of claim 1 to 5, it is characterised in that described to award
Power frequency band includes the frequency band based on following any network technology：LTE network, LTE-A network, or
GSM network.
7. method according to any one of claim 1 to 5, it is characterised in that it is described not
Authorized frequency bands include the frequency band based on following any network technology：Zigbee or Wi-Fi.
8. a kind of in the cordless communication network that authorized frequency bands and unlicensed frequency band coexist, set by network
Standby (4) send the tune of the uplink scheduling information for the unlicensed frequency band to user equipment
Degree device (40), it is characterised in that the device is configured to, via the authorized frequency bands to described
User equipment sends the uplink scheduling information for the unlicensed frequency band.
9. dispatching device according to claim 8, it is characterised in that the network equipment with
The user equipment is at least operated under TDD mode on the unlicensed frequency band.
10. dispatching device according to claim 8, it is characterised in that including：
Dispensing device (400), is configured to the user equipment send configuration information, the configuration
The uplink scheduling information that information indicates the network equipment transmission is based on institute with the user equipment
State the corresponding relation in time domain between the uplink that uplink scheduling information is carried out.
11. dispatching device according to any one of claim 8-10, it is characterised in that institute
The transmission of uplink scheduling information is stated than early at least 4 of uplink corresponding to the uplink scheduling information
Subframe.
12. dispatching devices according to claim 11, it is characterised in that the uplink scheduling
The transmission of information is than early at most 7 subframes of uplink corresponding to the uplink scheduling information.
13. dispatching device according to any one of claim 8 to 12, it is characterised in that
The authorized frequency bands include the frequency band based on following any network technology：LTE network, LTE-A nets
Network, or GSM network.
14. dispatching device according to any one of claim 8 to 12, it is characterised in that
The unlicensed frequency band includes the frequency band based on following any network technology：Zigbee or Wi-Fi.
A kind of 15. networks in the cordless communication network that authorized frequency bands and unlicensed frequency band coexist set
Standby (4), it is characterised in that including the dispatching device any one of claim 8 to 14
(40)。
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| CN201511025266.2A CN106937395A (en) | 2015-12-30 | 2015-12-30 | Send the method and dispatching device of uplink scheduling information for unlicensed frequency band |
| PCT/IB2016/001905 WO2017115130A1 (en) | 2015-12-30 | 2016-12-14 | Method and scheduling apparatus for transmitting uplink scheduling information for an unlicensed band |
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Cited By (3)
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| CN109392164A (en) * | 2017-08-02 | 2019-02-26 | 中国电信股份有限公司 | Transmission method, system and the 5G terminal of uplink information |
| CN110719227A (en) * | 2018-07-11 | 2020-01-21 | 华为技术有限公司 | Data transmission method and related device |
| WO2020206622A1 (en) * | 2019-04-09 | 2020-10-15 | Oppo广东移动通信有限公司 | Method and apparatus for wireless communication |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3755084B1 (en) * | 2018-02-13 | 2024-01-24 | Beijing Xiaomi Mobile Software Co., Ltd. | Information transmission method and device, base station, and user equipment |
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