CN105634755B - A kind of directintermination running time-frequency resource application method and device - Google Patents
A kind of directintermination running time-frequency resource application method and device Download PDFInfo
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- CN105634755B CN105634755B CN201410643579.3A CN201410643579A CN105634755B CN 105634755 B CN105634755 B CN 105634755B CN 201410643579 A CN201410643579 A CN 201410643579A CN 105634755 B CN105634755 B CN 105634755B
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Abstract
The present invention relates to a kind of directintermination running time-frequency resource application methods, the present invention can make demand of the main control terminal according to current business to communication bandwidth, and the wireless channel condition to slave terminal, and main control terminal own power, the configuring conditions such as antenna, select the frequency domain and time-domain resource that are suitble to current business, to improve efficiency of transmission, main control terminal sends business datum using pseudo-random fashion selection sending time slots simultaneously, in the descending time slot that selection is not sent, main control terminal will monitor the discovery signal of adjacent master control in network-off direct-passing channel, it records and updates local " DMO channel wireless resource pool ", occupancy situation of the adjacent main control terminal that record listens to present channel running time-frequency resource；If it find that just searching and selecting the resource not conflicted according to conflict evading process with the presence of main control terminal and oneself resource contention, notify slave terminal, then change to new running time-frequency resource and work.The invention also discloses a kind of directintermination running time-frequency resource use devices.
Description
Technical field
The present invention relates to field of communication technology more particularly to a kind of directintermination running time-frequency resource application method and devices.
Background technique
In current techniques patent, network-off direct-passing main control terminal is provided by broadcasting the time-frequency of oneself occupancy in discovery channel
Source.Wherein, on frequency domain, root business that can be semi-static needs to broadcast the RB block resource for needing to occupy, and generally accounts for mark
With the number of the starting RB of resource number and the RB block continuously occupied.Terminal network-off direct-passing running time-frequency resource based on TD-LTE occupies
Method is mostly to use complete time division way at present, i.e., only one main control terminal is sending data, this side in a subframe
Although formula is conducive to simplify the frequency domain resource management of direct-passing mode, but will affect the covering power of single-hop communication, in business band
When wide demand is smaller, the waste of frequency resource is caused, and for time-domain resource, LTE terminal is mainly disposed at sub-frame of uplink at present
Transmission business only supports single-hop non-acknowledgement mode.For tdd mode, sub-frame of uplink resource is less with respect to accounting, and non-acknowledgement side
Formula can not efficiently use feedback and improve wireless resource utility efficiency, so that the technologies such as AMC and HARQ of LTE are unable to give full play work
With.
Summary of the invention
It being capable of effective coordination the technical problem to be solved by the present invention is to how design accurate running time-frequency resource application method
The resource occupation structure of crossover node, effectively finds and evades the critical issue of conflict in multihop network.
For this purpose, the invention proposes a kind of directintermination running time-frequency resource application methods, comprising the following specific steps
S1: it broadcasts the message in main control terminal discovery channel, i.e., sends the broadcast message to slave terminal；
Wherein, the broadcast message includes: system bandwidth, PHICH configuration, System Frame Number, the main control terminal DMO business
Frequency resource preemption instruction, the main control terminal DMO business time-domain resource pre-empted spot and presently described main control terminal occupy
The validity period of running time-frequency resource counts down；
S2: the tagged slave terminal of tool receives the information in the broadcast message and is fed back；
S3: the main control terminal monitors DMO channel in listening period；
Wherein, it monitors and specifically includes described in the broadcast message that the main control terminal for being currently controlling channel is sent
The case where occupying running time-frequency resource；According to the feedback information received, the main control terminal draws and updates local running time-frequency resource pond；
Wherein, when discovery with other main control terminals there are when time-frequency resource contention, carry out evasive action；If there is
The running time-frequency resource not conflicted selects the resource to continue business；If it find that without resource or inadequate resource, then basis
The case where each main control terminal priority and service priority for listening to, selects the lower main control terminal of access priority,
Negotiate to obtain running time-frequency resource；If current business priority is very high, by using emergency call request mode, running time-frequency resource is broadcasted
Request and priority, notify each main control terminal in current DMO channel, and carry out resource and seize.
Specifically, the tagged slave terminal of tool receives the information in broadcast message and is fed back further include: right
The slave terminal channel quality indication (CQI) information feedback, self-adapting modulation coding information feedback and hybrid automatic repeat-request letter
Breath feedback.
Specifically, the main control terminal sends the broadcast message by pseudo-random fashion.
For this purpose, the invention also provides a kind of directintermination running time-frequency resource use devices, comprising:
Broadcast module sends the broadcast to slave terminal and disappears for broadcasting the message in main control terminal discovery channel
Breath；
Wherein, the broadcast message includes: system bandwidth, PHICH configuration, System Frame Number, the main control terminal DMO business
Frequency resource preemption instruction, the main control terminal DMO business time-domain resource pre-empted spot and presently described main control terminal occupy
The validity period of running time-frequency resource counts down；
Feedback module is received, for having the information in tagged slave terminal reception broadcast message and being fed back；
Module is monitored, DMO channel is monitored in listening period for the main control terminal.
Further, the monitoring module further include:
Updating unit, the feedback information for arriving according to monitoring reception are drawn, the main control terminal draws and updates local
Running time-frequency resource pond.
Further, the monitoring module further include:
Evade unit, for when discovery with other main control terminals there are when time-frequency resource contention, carry out evasive action；
Execution unit, for selecting the resource to continue business if there is the running time-frequency resource not conflicted.
Further, the monitoring module further include:
Priority selector unit is used for if it find that without resource or inadequate resource, then according to each master control listened to
The case where terminal PRI and service priority, selects the lower main control terminal of access priority, negotiates to obtain time-frequency money
Source；
Calling unit, by using emergency call request mode, broadcasts time-frequency if very high for current business priority
Resource request and priority notify each main control terminal in current DMO channel, and carry out resource and seize.
Specifically, the main control terminal sends the broadcast message by pseudo-random fashion.
By using a kind of presently disclosed directintermination running time-frequency resource application method, main control terminal can be made according to working as
Demand of the preceding business to communication bandwidth, arrive targeted slave terminal radio channel the case where and main control terminal own power, day
The configuring conditions such as line, select be suitble to current business frequency domain and time-domain resource, thus efficiently use master control to slave terminal nothing
Line channel resource improves efficiency of transmission using AMC and HARQ feedback mechanism, while main control terminal is adopted in each transmission window
With pseudo-random fashion send business datum, do not send do not receive yet slave terminal feedback time window in DMO channel into
Row is monitored, and records and update the occupancy situation of current DMO channel running time-frequency resource, the resource contention having found that it is likely that, and carry out in time
Evade.The invention also discloses a kind of directintermination running time-frequency resource use devices.
Detailed description of the invention
The features and advantages of the present invention will be more clearly understood by referring to the accompanying drawings, and attached drawing is schematically without that should manage
Solution is carries out any restrictions to the present invention, in the accompanying drawings:
Fig. 1 shows the step flow chart of one of embodiment of the present invention directintermination running time-frequency resource application method；
Fig. 2 (a)-(i) shows the specific reality of one of embodiment of the present invention directintermination running time-frequency resource application method
It illustrates and is intended to；
Fig. 3 shows the structure chart of one of embodiment of the present invention directintermination running time-frequency resource use device.
Specific embodiment
Below in conjunction with attached drawing, embodiments of the present invention is described in detail.
As shown in Figure 1, the present invention provides a kind of directintermination running time-frequency resource application methods, comprising the following specific steps
Step S1: it broadcasts the message in main control terminal discovery channel, i.e., sends the broadcast message to slave terminal, wherein
Broadcast message include: system bandwidth, PHICH configuration, System Frame Number, the main control terminal DMO traffic frequencies resource preemption instruction,
The validity period that the main control terminal DMO business time-domain resource pre-empted spot and presently described main control terminal occupy running time-frequency resource falls
It counts, and main control terminal sends broadcast message and business datum by pseudo-random fashion, i.e., main control terminal in broadcast by disappearing
It ceases and sends DMO_DCCH instruction slave terminal reception business datum in the semi-persistent resource occupied.
Step S2: have tagged slave terminal and receive the information in broadcast message and fed back.Specifically, to subordinate
Terminal channel quality indicates information feedback, self-adapting modulation coding information feedback and hybrid automatic retransmission request information feedback,
Effectively raise the efficiency of transmission of business datum.
Step S3: main control terminal monitors DMO channel in listening period；Wherein, it monitors and specifically includes currently just
Described in the broadcast message that the main control terminal of control channel is sent the case where occupancy running time-frequency resource；According to the feedback received
Information, main control terminal draw and update local running time-frequency resource pond.
Further, when discovery with other main control terminals there are when time-frequency resource contention, carry out evasive action；If there is
The running time-frequency resource not conflicted selects the resource to continue business；If it find that without resource or inadequate resource, then basis
The case where each main control terminal priority and service priority for listening to, selects the lower main control terminal of access priority, negotiates
Obtain running time-frequency resource；If current business priority is very high, by using emergency call request mode, running time-frequency resource request is broadcasted
And priority, notify each main control terminal in current DMO channel, and carry out resource and seize.
In order to better understand and apply a kind of directintermination running time-frequency resource application method proposed by the present invention and device, this
Invention carries out following example, and the present invention is not limited to examples in detail below.
Specifically, in the present invention, network-off direct-passing terminal time-domain resource is occupied and TD-LTE (Time Division Long
Term Evolution, timesharing long term evolution) it is compatible, that is, the uplink-downlink configuration of TD-LTE whole may be selected, the following are to every kind
Selection method under configuration mode is described in detail:
It is 0, i.e. DSUUU mode, downlink HARQ (Hybrid Automatic Repeat for uplink-downlink configuration
Request, hybrid automatic repeat-request) process number be 4, as shown in Fig. 2 (a).Wherein, since DMO has found channel occupancy
DwPTS time-domain resource position, therefore 3 two processes of downlink HARQ 1 and downlink HARQ will be unable to use network-off direct-passing in figure
Only there are two HARQ processes can be used in the time domain for terminal.
Further, DMO main control terminal send when, generally the bandwidth according to needed for type of service and with subordinate end
The occupancy mode of channel status selection running time-frequency resource between end.Such as: when main control terminal and slave terminal are closer, channel
When condition is preferable, main control terminal wishes the visual individual calling that a simplex mode is initiated to slave terminal, it is assumed that bandwidth demand is
1Mbps, then main control terminal can carry out resource selection and preemption according to the occupancy situation of present channel running time-frequency resource；If current
Channel idle, and main control terminal and slave terminal have been set up connection, it is assumed that main control terminal to slave terminal wireless channel item
Part is good, can support high order modulation, then main control terminal selects each random period for 4 radio frames, wherein one by calculating
Half time-domain resource is occupied in a random period, i.e., in four radio frames 0,1,2,3, occupies two therein at random wirelessly
Frame utilizes wherein whole two HARQ processes, i.e. downlink HARQ 0 and downlink HARQ 2, detailed process in the two radio frames
As shown in Fig. 2 (b).Wherein, in the cycle period of every 4 radio frames, having 2 radio frames to amount to 4 downlink subframes can be sent out
Send business datum；For the service bandwidth demand of 1Mbps, can calculate each subframe need to carry 10kbit business datum, disregard
Expense selects I_MCS=28, I_TBS=26, N_PRB=15, for TBS=11064；Main control terminal will occupy 15 in frequency domain
A RB sends this visual single call service.
Further, main control terminal sends feedback by instruction slave terminal, carries out MCS (Modulation and
Coding Scheme, modulation and coding strategy) and the link circuit self-adaptings such as HARQ control, it is assumed that the main control terminal is in frequency domain statement
32 RB blocks are camped on, DMO_DCCH is sent and occupies 4 RB blocks, only send the DMO_DSCH business datum of 15 RB blocks,
Then occupied shown in schematic diagram such as Fig. 2 (c) in one cycle period using the running time-frequency resource of dynamic dispatching mode.As a result, at this time
The main control terminal is interrupted in the continuity that time domain works, it is therefore desirable to next cycle period continue corresponding HARQ into
Journey.
Further, main control terminal monitors channel in the unoccupied radio frames in a cycle period, with
It receives and draws out the occupancy situation apart from oneself closer main control terminal to running time-frequency resource；If it find that there is other main control terminals
The running time-frequency resource occupied with oneself clashes, then oneself occupancy scheme to running time-frequency resource is adjusted in time, in practical application
In, to improve system randomness, longer cycle period and more complicated time domain pseudorandom occupancy mode can be used, to improve
The flexibility of conflict ability of discovery and contention-resolution schemes selection.
Shown in optional time-domain resource and HARQ process schematic diagram such as Fig. 2 (d) when uplink-downlink configuration 1: downlink HARQ process
Number is 7, but in DMO, special subframe is configured to have used transmission discovery signal, it is therefore desirable to the downlink of uplink-downlink configuration 1
Scheduling timing is modified.Specifically, modification includes: that subframe 0 and subframe 5 award transmission to the uplink of subframe 7 and subframe 2
Power, subframe 1 and subframe 6 will not retransmit uplink authorization to sub- frame 7 and subframe 2, and subframe 7 and subframe 2 will only feedback 0 Hes of subframe
The HARQ information of subframe 5, and no longer feed back the HARQ information of subframe 1 and subframe 6.
Shown in optional time-domain resource and HARQ process schematic diagram such as Fig. 2 (e) when uplink-downlink configuration 2: downlink HARQ process
Number is 2, and special subframe has done same processing, it is therefore desirable to do corresponding change；Optional time-domain resource when uplink-downlink configuration 3 and
Shown in HARQ process schematic diagram such as Fig. 2 (f): downlink HARQ process number is 3, and special subframe has done same processing, it is therefore desirable to do
Corresponding change；Shown in optional time-domain resource and HARQ process schematic diagram such as Fig. 2 (g) when uplink-downlink configuration 4: downlink HARQ process
Number is 2, and special subframe has done same processing, it is therefore desirable to do corresponding change；Optional time-domain resource when uplink-downlink configuration 5 and
Shown in HARQ process schematic diagram such as Fig. 2 (h): downlink HARQ process number is 1, and special subframe has done same processing, it is therefore desirable to do
Corresponding change, wherein in DMO real work, intends the big downstream arrangements such as main selection uplink-downlink configuration 5 and support related service, with
Obtain higher business throughput；Shown in optional time-domain resource and HARQ process schematic diagram such as Fig. 2 (i) when uplink-downlink configuration 6:
Downlink HARQ process number is 6, and special subframe has done same processing, it is therefore desirable to do corresponding change.
As shown in figure 3, the present invention provides a kind of directintermination running time-frequency resource use devices 10, comprising: broadcast module
101, it receives feedback module 102 and monitors module 103.
Specifically, broadcast module 101 sends to slave terminal and broadcasts for broadcasting the message in main control terminal discovery channel
Message；Wherein, broadcast message includes: system bandwidth, PHICH configuration, System Frame Number, main control terminal DMO traffic frequencies money
Source preemption instruction, the main control terminal DMO business time-domain resource pre-empted spot and presently described main control terminal occupy time-frequency money
The validity period in source counts down, and main control terminal sends broadcast message and business datum, i.e. main control terminal by pseudo-random fashion
Indicate that slave terminal receives business datum by sending DMO_DCCH in the semi-persistent resource that broadcast message occupies；Receive feedback
Module 102 is used to have tagged slave terminal and receives the information in broadcast message and fed back, specifically, to slave terminal
Channel quality indication (CQI) information feedback, self-adapting modulation coding information feedback and hybrid automatic retransmission request information feedback, effectively
The efficiency of transmission for improving business datum；Module 103 is monitored to supervise DMO channel in listening period for main control terminal
It listens.
Further, module 103 is monitored further include: draw 1031 (not shown) of updating unit for connecing according to monitoring
The feedback information received, main control terminal draw and update local running time-frequency resource pond.
Further, monitor module 103 further include: evade 1032 (not shown) of unit for when discovery and other masters
Control terminal carries out evasive action there are when time-frequency resource contention；1033 (not shown) of execution unit is used for if there is not having
There is the running time-frequency resource of conflict, the resource is selected to continue business.
Further, module 103 is monitored further include: if 1034 (not shown) of priority selector unit is for sending out
Now without resource or inadequate resource, then according to each main control terminal priority and service priority listened to the case where, selection
The lower main control terminal of access priority negotiates to obtain running time-frequency resource；If 1035 (not shown) of calling unit is for working as
Preceding service priority is very high, by using emergency call request mode, broadcasts running time-frequency resource request and priority, notice is current
Each main control terminal in DMO channel, and carry out resource and seize.
By using a kind of presently disclosed directintermination running time-frequency resource application method, main control terminal can be made according to working as
Demand of the preceding business to communication bandwidth, arrive targeted slave terminal radio channel the case where and main control terminal own power, antenna
Equal configuring conditions select the frequency domain and time-domain resource that are suitble to current business, to efficiently use master control to the wireless of slave terminal
Channel resource improves efficiency of transmission using AMC and HARQ feedback mechanism, while main control terminal uses in each transmission window
Pseudo-random fashion sends business datum, carries out not sending in the time window for also not receiving slave terminal feedback to DMO channel
It monitors, records and update the occupancy situation of current DMO channel running time-frequency resource, the resource contention having found that it is likely that, and advised in time
It keeps away.The invention also discloses a kind of directintermination running time-frequency resource use devices.
Although the embodiments of the invention are described in conjunction with the attached drawings, but those skilled in the art can not depart from this hair
Various modifications and variations are made in the case where bright spirit and scope, such modifications and variations are each fallen within by appended claims
Within limited range.
Claims (8)
1. a kind of directintermination running time-frequency resource application method, which is characterized in that comprising the following specific steps
S1: main control terminal is broadcast the message by sending in discovery channel, sends the broadcast message to slave terminal；
Wherein, the broadcast message includes: system bandwidth, PHICH configuration, System Frame Number, the main control terminal DMO traffic frequencies
Resource preemption instruction, the main control terminal DMO business time-domain resource pre-empted spot and the main control terminal currently occupy time-frequency
The validity period of resource counts down；
S2: the tagged slave terminal of tool receives the information in the broadcast message and is fed back；
S3: the main control terminal monitors DMO channel in listening period；
Wherein, it monitors to specifically include and occupies time-frequency described in the broadcast message that the main control terminal for being currently controlling channel is sent
The case where resource；According to the feedback information received, the main control terminal draws and updates local running time-frequency resource pond；
Wherein, when discovery with other main control terminals there are when time-frequency resource contention, carry out evasive action；If there is not conflicting
Running time-frequency resource, select the resource to continue business；If it find that then basis listens to without resource or inadequate resource
The case where each main control terminal priority and service priority, the main control terminal for selecting access priority low negotiate to obtain time-frequency money
Source；If current business priority is high, by using emergency call request mode, running time-frequency resource request and priority is broadcasted, is led to
Know each main control terminal in current DMO channel, and carries out resource and seize.
2. the method as described in claim 1, which is characterized in that the tagged slave terminal of tool receives in broadcast message
Information is simultaneously fed back further include: anti-to slave terminal channel quality indication (CQI) information feedback, self-adapting modulation coding information
Feedback and hybrid automatic retransmission request information feedback.
3. the method as described in claim 1, which is characterized in that the main control terminal sends the broadcast by pseudo-random fashion
Message.
4. a kind of directintermination running time-frequency resource use device characterized by comprising
Broadcast module is broadcast the message by sending in discovery channel for main control terminal, sends the broadcast to slave terminal
Message；
Wherein, the broadcast message includes: system bandwidth, PHICH configuration, System Frame Number, the main control terminal DMO traffic frequencies
Resource preemption instruction, the main control terminal DMO business time-domain resource pre-empted spot and the main control terminal currently occupy time-frequency
The validity period of resource counts down；
Feedback module is received, for having the information in tagged slave terminal reception broadcast message and being fed back；
Module is monitored, DMO channel is monitored in listening period for the main control terminal；
Wherein, it monitors to specifically include and occupies time-frequency described in the broadcast message that the main control terminal for being currently controlling channel is sent
The case where resource；
When discovery with other main control terminals there are when time-frequency resource contention, carry out evasive action；If there is do not conflict when
Frequency resource selects the resource to continue business；If it find that without resource or inadequate resource, then according to each master listened to
The case where control terminal priority and service priority, the main control terminal for selecting access priority low negotiate to obtain running time-frequency resource；Such as
Fruit current business priority is high, by using emergency call request mode, broadcasts running time-frequency resource request and priority, notice is current
Each main control terminal in DMO channel, and carry out resource and seize.
5. device as claimed in claim 4, which is characterized in that the monitoring module further include:
Updating unit, the feedback information for arriving according to monitoring reception are drawn, the main control terminal draws and updates local time-frequency
Resource pool.
6. device as claimed in claim 4, which is characterized in that the monitoring module further include:
Evade unit, for when discovery with other main control terminals there are when time-frequency resource contention, carry out evasive action；
Execution unit, for selecting the resource to continue business if there is the running time-frequency resource not conflicted.
7. device as claimed in claim 4, which is characterized in that the monitoring module further include:
Priority selector unit is used for if it find that without resource or inadequate resource, then according to each main control terminal listened to
The case where priority and service priority, the main control terminal for selecting access priority low negotiate to obtain running time-frequency resource；
Calling unit, by using emergency call request mode, is broadcasted running time-frequency resource and is asked if high for current business priority
Summation priority, notifies each main control terminal in current DMO channel, and carry out resource and seize.
8. device as claimed in claim 4, which is characterized in that the main control terminal sends the broadcast by pseudo-random fashion
Message.
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| GB2552792B8 (en) * | 2016-08-08 | 2019-01-30 | Tcl Communication Ltd | Methods and devices for resource selection for direct transmissions between wireless devices in a wireless communication system |
| CN108024292B (en) * | 2016-11-04 | 2019-09-17 | 电信科学技术研究院 | A kind of resource method for removing and device |
| CN109219015B (en) * | 2017-07-06 | 2021-01-22 | 电信科学技术研究院 | Resource selection method and device |
| CN109392136B (en) * | 2017-08-11 | 2022-04-08 | 大唐移动通信设备有限公司 | Time domain resource determining and configuring method, terminal and network side equipment |
| CN109729597B (en) * | 2017-10-31 | 2022-09-30 | 中国电信股份有限公司 | Uplink resource scheduling method, system, base station and user terminal |
| WO2019157726A1 (en) * | 2018-02-14 | 2019-08-22 | Oppo广东移动通信有限公司 | Resource reporting method, terminal device and network device |
| CN109120552B (en) * | 2018-08-15 | 2021-10-19 | 大连大学 | QOS-oriented bandwidth and power multi-target cross-layer optimization method in AOS |
| CN111435892B (en) * | 2019-01-11 | 2021-11-19 | 华为技术有限公司 | Method and device for receiving data |
| CN112787783B (en) * | 2019-11-08 | 2022-04-01 | 大唐移动通信设备有限公司 | Information feedback and retransmission method and terminal |
| CN113194440B (en) * | 2021-04-28 | 2022-10-04 | 西安电子科技大学 | Method for preempting transmission resources in Internet of vehicles |
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