CN105634755A - DMO terminal time and frequency resource using method and apparatus - Google Patents
DMO terminal time and frequency resource using method and apparatus Download PDFInfo
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Abstract
The present invention relates to a DMO (Direct Mode Operation) terminal time and frequency resource using method. Through adoption of the DMO terminal time and frequency resource using method, a master control terminal can select frequency and time resources suitable for the current service according to requirements of the current service on communication bandwidth, the situation of a wireless channel to a slave terminal, and configuration states of power and antennas of the master control terminal, thereby improving transmission efficiency; at the same time, the master control terminal adopts a pseudo random mode to select a transmission time slot for transmitting service data, in the selected downlink time slot in which the service data is not transmitted, the master control terminal monitors a discovery signal for adjacent master control terminals in a DMO channel, records and updates a local 'DMO channel wireless resource pool', and records the monitored occupation situation of time and frequency resources of the current channel by the adjacent master control terminals; if it is found that there is a master control terminal having resource conflict with the self terminal, the resource without conflict is searched and selected according to a conflict avoidance flow, the slave terminal is notified, and a new time and frequency resource is adopted for operation. The invention also discloses a DMO terminal time and frequency resource using apparatus.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of directintermination running time-frequency resource using method and device.
Background technology
In current techniques patent, network-off direct-passing main control terminal is by broadcasting, in finding channel, the running time-frequency resource oneself taken. Wherein, on frequency domain, it is possible to semi-static root service needed broadcast needs the RB block resource taken, the number of the initial RB numbering that generally mark is taken resource and the RB block taken continuously. Take method based on the terminal network-off direct-passing running time-frequency resource of TD-LTE and mostly be the complete time division way of employing at present, namely in a subframe, only one of which main control terminal is sending data, although this mode is conducive to simplifying the frequency domain resource management of direct-passing mode, but the covering power of single-hop communication can be affected, when service bandwidth demand is less, cause the waste of frequency resource, and for time-domain resource, current LTE terminal is mainly disposed at sub-frame of uplink and sends business, only supports single-hop non-acknowledgement mode. For tdd mode, sub-frame of uplink resource is less relative to accounting, and non-acknowledgement mode cannot effectively utilize feedback to improve wireless resource utility efficiency so that the technology such as AMC and the HARQ of LTE cannot play one's part to the full.
Summary of the invention
The technical problem to be solved be how to design accurate running time-frequency resource using method can the resource occupation structure of crossover node in effective coordination multihop network, effectively find and evade the key issue of conflict.
For this purpose it is proposed, the present invention proposes a kind of directintermination running time-frequency resource using method, including step in detail below:
S1: main control terminal finds broadcast in channel, namely sends described broadcast to slave terminal;
Wherein, described broadcast includes: system bandwidth, PHICH configuration, System Frame Number, the preemption instruction of described main control terminal DMO traffic frequencies resource, described main control terminal DMO business time-domain resource pre-empted spot and presently described main control terminal take the effect duration of running time-frequency resource and count down;
S2: the described slave terminal with mark receives the information in described broadcast and feeds back;
S3: DMO channel is monitored by described main control terminal in listening period;
Wherein, the situation taking running time-frequency resource described in broadcast specifically including the described main control terminal transmission being currently controlling channel is monitored; According to the feedback information received, described main control terminal is drawn and updates local running time-frequency resource pond;
Wherein, when finding that there is running time-frequency resource conflicts with main control terminal other described, evasive action is carried out; If there is the running time-frequency resource not having conflict, this resource is selected to proceed business; If it find that there is no resource or inadequate resource, then the situation according to each main control terminal priority listened to and service priority, select the described main control terminal that access priority is relatively low, consult to obtain running time-frequency resource; If current business priority is significantly high, by adopting emergency call request mode, broadcast running time-frequency resource request and priority, notify each described main control terminal in current DMO channel, and carry out resource and seize.
Specifically, the slave terminal described in mark receives the information in broadcast and carries out feeding back also including: described slave terminal channel quality indication (CQI) information is fed back, self-adapting modulation coding information feeds back and hybrid automatic retransmission request information feedback.
Specifically, described main control terminal sends described broadcast by pseudo-random fashion.
For this purpose it is proposed, the invention allows for a kind of directintermination running time-frequency resource to use device, including:
Broadcast module, finds broadcast in channel for main control terminal, namely sends described broadcast to slave terminal;
Wherein, described broadcast includes: system bandwidth, PHICH configuration, System Frame Number, the preemption instruction of described main control terminal DMO traffic frequencies resource, described main control terminal DMO business time-domain resource pre-empted spot and presently described main control terminal take the effect duration of running time-frequency resource and count down;
Receiving feedback module, the slave terminal for having mark receives the information in broadcast and feeds back;
Monitor module, in listening period, DMO channel is monitored for described main control terminal.
Further, described monitoring module also includes:
Drawing updating block, for the feedback information arrived according to monitoring reception, described main control terminal is drawn and updates local running time-frequency resource pond.
Further, described monitoring module also includes:
Evade unit, for when finding that there is running time-frequency resource conflicts with main control terminal other described, carrying out evasive action;
Performance element, if for there is the running time-frequency resource not having conflict, selecting this resource to proceed business.
Further, described monitoring module also includes:
Priority selector unit, is used for if it find that do not have resource or inadequate resource, then the situation according to each main control terminal priority listened to and service priority, selects the described main control terminal that access priority is relatively low, consults to obtain running time-frequency resource;
Calling unit, if significantly high for current business priority, by adopting emergency call request mode, broadcast running time-frequency resource request and priority, notify each described main control terminal in current DMO channel, and carry out resource and seize.
Specifically, described main control terminal sends described broadcast by pseudo-random fashion.
By adopting presently disclosed a kind of directintermination running time-frequency resource using method, main control terminal can be made according to the current business demand to communication bandwidth, situation to targeted slave terminal radio channel, and main control terminal own power, the configuring conditions such as antenna, select to be suitable for frequency domain and the time-domain resource of current business, thus effectively utilizing master control to the radio channel resource of slave terminal, use AMC and HARQ feedback mechanism, improve efficiency of transmission, main control terminal adopts pseudo-random fashion to send business datum in each transmission window simultaneously, not sending in the time window also not receiving slave terminal feedback, DMO channel is monitored, record and update current DMO channel running time-frequency resource take situation, the resource contention having found that it is likely that, and evade in time. the invention also discloses a kind of directintermination running time-frequency resource and use device.
Accompanying drawing explanation
Being more clearly understood from the features and advantages of the present invention by reference accompanying drawing, accompanying drawing is schematic and should not be construed as and the present invention is carried out any restriction, in the accompanying drawings:
Fig. 1 illustrates the flow chart of steps of a kind of directintermination running time-frequency resource using method in the embodiment of the present invention;
Fig. 2 (a)-(i) illustrates the instantiation schematic diagram of a kind of directintermination running time-frequency resource using method in the embodiment of the present invention;
Fig. 3 illustrates that a kind of directintermination running time-frequency resource in the embodiment of the present invention uses the structure chart of device.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the present invention is described in detail.
As it is shown in figure 1, the invention provides a kind of directintermination running time-frequency resource using method, including step in detail below:
Step S1: main control terminal finds broadcast in channel, namely described broadcast is sent to slave terminal, wherein, broadcast includes: system bandwidth, PHICH configures, System Frame Number, the preemption instruction of described main control terminal DMO traffic frequencies resource, described main control terminal DMO business time-domain resource pre-empted spot and presently described main control terminal take the effect duration of running time-frequency resource and count down, and main control terminal sends broadcast and business datum by pseudo-random fashion, namely main control terminal indicates slave terminal to receive business datum by sending DMO_DCCH in the semi-persistent resource that takies in broadcast.
Step S2: the slave terminal with mark receives the information in broadcast and feeds back. Specifically, slave terminal channel quality indication (CQI) information is fed back, self-adapting modulation coding information feeds back and hybrid automatic retransmission request information feedback, effectively raises the efficiency of transmission of business datum.
Step S3: DMO channel is monitored by main control terminal in listening period; Wherein, the situation taking running time-frequency resource described in broadcast specifically including the main control terminal transmission being currently controlling channel is monitored; According to the feedback information received, main control terminal is drawn and updates local running time-frequency resource pond.
Further, when finding that there is running time-frequency resource conflicts with other main control terminal, evasive action is carried out; If there is the running time-frequency resource not having conflict, this resource is selected to proceed business; If it find that there is no resource or inadequate resource, then the situation according to each main control terminal priority listened to and service priority, select the main control terminal that access priority is relatively low, consult to obtain running time-frequency resource; If current business priority is significantly high, by adopting emergency call request mode, broadcast running time-frequency resource request and priority, notify each main control terminal in current DMO channel, and carry out resource and seize.
In order to be better understood from and apply a kind of directintermination running time-frequency resource using method and the device that the present invention proposes, the present invention carries out the example below, and the invention is not restricted to example in detail below.
Specifically, in the present invention, network-off direct-passing terminal time-domain resource takies and TD-LTE (TimeDivisionLongTermEvolution, timesharing Long Term Evolution) compatible, namely optional whole for TD-LTE uplink-downlink configuration, below for the system of selection under every kind of configuration mode is described in detail:
Be 0 for uplink-downlink configuration, i.e. DSUUU mode, descending HARQ (HybridAutomaticRepeatRequest, hybrid automatic repeat-request) process number is 4, as shown in Fig. 2 (a). Wherein, owing to DMO finds channel occupancy DwPTS time-domain resource position, therefore in figure, descending HARQ1 and two processes of descending HARQ3 will be unable to use, and network-off direct-passing terminal only has two HARQ processes to use in time domain.
Further, when DMO main control terminal sends, generally can according to type of service desire bandwidth and and slave terminal between channel status select running time-frequency resource occupancy mode. Such as: when main control terminal and slave terminal close together, when channel condition is better, main control terminal wishes the visual individual calling initiating a simplex mode to slave terminal, assume that bandwidth demand is 1Mbps, then main control terminal can carry out resource selection and preemption according to the situation that takies of present channel running time-frequency resource; If present channel is idle, and main control terminal and slave terminal have been set up connecting, assume that main control terminal is good to slave terminal wireless channel conditions, high order modulation can be supported, then main control terminal is through calculating, selecting each random period is 4 radio frames, half time-domain resource is taken, namely four radio frames 0,1 in one of them random period, 2, in 3, take two radio frames therein at random, in the two radio frames, utilize wherein whole two HARQ processes, i.e. descending HARQ0 and descending HARQ2, detailed process is such as shown in Fig. 2 (b). Wherein, in the cycle period of every 4 radio frames, there are 2 radio frames to amount to 4 descending sub frames and can send business datum; For the service bandwidth demand of 1Mbps, each subframe can be calculated and need to carry 10kbit business datum, disregard expense, select I_MCS=28, I_TBS=26, N_PRB=15, for TBS=11064; Main control terminal will take 15 RB at frequency domain and send this visual single call service.
Further, main control terminal sends feedback by indicating slave terminal, carry out MCS (ModulationandCodingScheme, modulation and coding strategy) and the control of the link circuit self-adapting such as HARQ, assume that this main control terminal is camped on 32 RB blocks in frequency domain statement, send DMO_DCCH and take 4 RB blocks, only send the DMO_DSCH business datum of 15 RB blocks, then adopt the running time-frequency resource of dynamic dispatching mode to take schematic diagram such as shown in Fig. 2 (c) in one cycle period. Thus, the seriality that now this main control terminal works in time domain is interrupted, it is therefore desirable to continue corresponding HARQ process at next cycle period.
Further, in main control terminal unoccupied radio frames in a cycle period, channel is monitored, apart from oneself nearer main control terminal running time-frequency resource taken situation to receive and to draw out; If it find that there is the running time-frequency resource that other main control terminal and oneself take to clash, then adjust oneself in time and running time-frequency resource taken scheme, in actual applications, for improving system randomness, longer cycle period and more complicated time domain pseudorandom occupancy mode can be adopted, to improve conflict ability of discovery and the motility of contention-resolution schemes selection.
Optional time-domain resource during uplink-downlink configuration 1 and HARQ process schematic diagram are such as shown in Fig. 2 (d): descending HARQ process number is 7, but in DMO, special subframe is configured to have used transmission to find signal, it is therefore desirable to the descending scheduling sequential of uplink-downlink configuration 1 is modified. Specifically, amendment includes: the uplink authorization that subframe 0 and subframe 5 will send subframe 7 and subframe 2, subframe 1 and subframe 6 will not retransmit antithetical phrase frame 7 and the uplink authorization of subframe 2, subframe 7 and subframe 2 will only feed back the HARQ information of subframe 0 and subframe 5, and no longer feed back the HARQ information of subframe 1 and subframe 6.
Optional time-domain resource during uplink-downlink configuration 2 and HARQ process schematic diagram are such as shown in Fig. 2 (e): descending HARQ process number is 2, and special subframe has done same process, it is therefore desirable to do corresponding change; Optional time-domain resource during uplink-downlink configuration 3 and HARQ process schematic diagram are such as shown in Fig. 2 (f): descending HARQ process number is 3, and special subframe has done same process, it is therefore desirable to do corresponding change; Optional time-domain resource during uplink-downlink configuration 4 and HARQ process schematic diagram are such as shown in Fig. 2 (g): descending HARQ process number is 2, and special subframe has done same process, it is therefore desirable to do corresponding change; Optional time-domain resource during uplink-downlink configuration 5 and HARQ process schematic diagram are such as shown in Fig. 2 (h): descending HARQ process number is 1, special subframe has done same process, it is thus desirable to do corresponding change, wherein, in DMO real work, intend main selection big downstream arrangements such as uplink-downlink configuration 5 grade and support related service, to obtain higher business throughput; Optional time-domain resource during uplink-downlink configuration 6 and HARQ process schematic diagram are such as shown in Fig. 2 (i): descending HARQ process number is 6, and special subframe has done same process, it is therefore desirable to do corresponding change.
As it is shown on figure 3, the invention provides a kind of directintermination running time-frequency resource to use device 10, including: broadcast module 101, reception feedback module 102 and monitoring module 103.
Specifically, broadcast module 101 finds broadcast in channel for main control terminal, namely sends broadcast to slave terminal; Wherein, broadcast includes: system bandwidth, PHICH configuration, System Frame Number, the preemption instruction of described main control terminal DMO traffic frequencies resource, described main control terminal DMO business time-domain resource pre-empted spot and presently described main control terminal take the effect duration of running time-frequency resource and count down, and main control terminal sends broadcast and business datum by pseudo-random fashion, namely main control terminal indicates slave terminal reception business datum by sending DMO_DCCH in the semi-persistent resource that takies in broadcast; Receive feedback module 102 receive the information in broadcast for the slave terminal with mark and feed back, specifically, slave terminal channel quality indication (CQI) information is fed back, self-adapting modulation coding information feeds back and hybrid automatic retransmission request information feedback, effectively raises the efficiency of transmission of business datum; Monitor module 103 DMO channel to be monitored in listening period for main control terminal.
Further, monitoring module 103 and also include: draw updating block 1031 (not shown) feedback information for arriving according to monitoring reception, main control terminal is drawn and updates local running time-frequency resource pond.
Further, monitor module 103 and also include: evade unit 1032 (not shown) for when finding that there is running time-frequency resource conflicts with other main control terminal, carrying out evasive action; If performance element 1033 (not shown) does not have the running time-frequency resource of conflict for existing, this resource is selected to proceed business.
Further, monitor module 103 also to include: priority selector unit 1034 (not shown) is not for if it find that have resource or inadequate resource, the then situation according to each main control terminal priority listened to and service priority, select the main control terminal that access priority is relatively low, consult to obtain running time-frequency resource; If calling unit 1035 (not shown) is significantly high for current business priority, by adopting emergency call request mode, broadcast running time-frequency resource request and priority, notify each main control terminal in current DMO channel, and carry out resource and seize.
By adopting presently disclosed a kind of directintermination running time-frequency resource using method, main control terminal can be made according to the current business demand to communication bandwidth, situation to targeted slave terminal radio channel, and main control terminal own power, the configuring conditions such as antenna, select to be suitable for frequency domain and the time-domain resource of current business, thus effectively utilizing master control to the radio channel resource of slave terminal, use AMC and HARQ feedback mechanism, improve efficiency of transmission, main control terminal adopts pseudo-random fashion to send business datum in each transmission window simultaneously, not sending in the time window also not receiving slave terminal feedback, DMO channel is monitored, record and update current DMO channel running time-frequency resource take situation, the resource contention having found that it is likely that, and evade in time. the invention also discloses a kind of directintermination running time-frequency resource and use device.
Although being described in conjunction with the accompanying embodiments of the present invention, but those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such amendment and modification each fall within the scope being defined by the appended claims.
Claims (8)
1. a directintermination running time-frequency resource using method, it is characterised in that include step in detail below:
S1: main control terminal finds broadcast in channel, namely sends described broadcast to slave terminal;
Wherein, described broadcast includes: system bandwidth, PHICH configuration, System Frame Number, the preemption instruction of described main control terminal DMO traffic frequencies resource, described main control terminal DMO business time-domain resource pre-empted spot and presently described main control terminal take the effect duration of running time-frequency resource and count down;
S2: the described slave terminal with mark receives the information in described broadcast and feeds back;
S3: DMO channel is monitored by described main control terminal in listening period;
Wherein, the situation taking running time-frequency resource described in broadcast specifically including the described main control terminal transmission being currently controlling channel is monitored; According to the feedback information received, described main control terminal is drawn and updates local running time-frequency resource pond;
Wherein, when finding that there is running time-frequency resource conflicts with main control terminal other described, evasive action is carried out; If there is the running time-frequency resource not having conflict, this resource is selected to proceed business; If it find that there is no resource or inadequate resource, then the situation according to each main control terminal priority listened to and service priority, select the described main control terminal that access priority is relatively low, consult to obtain running time-frequency resource; If current business priority is significantly high, by adopting emergency call request mode, broadcast running time-frequency resource request and priority, notify each described main control terminal in current DMO channel, and carry out resource and seize.
2. the method for claim 1, it is characterized in that, described in there is the slave terminal of mark receive the information in broadcast and carry out feeding back also including: described slave terminal channel quality indication (CQI) information is fed back, self-adapting modulation coding information feedback and hybrid automatic retransmission request information feedback.
3. the method for claim 1, it is characterised in that described main control terminal sends described broadcast by pseudo-random fashion.
4. a directintermination running time-frequency resource uses device, it is characterised in that including:
Broadcast module, finds broadcast in channel for main control terminal, namely sends described broadcast to slave terminal;
Wherein, described broadcast includes: system bandwidth, PHICH configuration, System Frame Number, the preemption instruction of described main control terminal DMO traffic frequencies resource, described main control terminal DMO business time-domain resource pre-empted spot and presently described main control terminal take the effect duration of running time-frequency resource and count down;
Receiving feedback module, the slave terminal for having mark receives the information in broadcast and feeds back;
Monitor module, in listening period, DMO channel is monitored for described main control terminal.
5. device as claimed in claim 4, it is characterised in that described monitoring module also includes:
Drawing updating block, for the feedback information arrived according to monitoring reception, described main control terminal is drawn and updates local running time-frequency resource pond.
6. device as claimed in claim 4, it is characterised in that described monitoring module also includes:
Evade unit, for when finding that there is running time-frequency resource conflicts with main control terminal other described, carrying out evasive action;
Performance element, if for there is the running time-frequency resource not having conflict, selecting this resource to proceed business.
7. device as claimed in claim 4, it is characterised in that described monitoring module also includes:
Priority selector unit, is used for if it find that do not have resource or inadequate resource, then the situation according to each main control terminal priority listened to and service priority, selects the described main control terminal that access priority is relatively low, consults to obtain running time-frequency resource;
Calling unit, if significantly high for current business priority, by adopting emergency call request mode, broadcast running time-frequency resource request and priority, notify each described main control terminal in current DMO channel, and carry out resource and seize.
8. device as claimed in claim 4, it is characterised in that described main control terminal sends described broadcast by pseudo-random fashion.
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| CN111435892B (en) * | 2019-01-11 | 2021-11-19 | 华为技术有限公司 | Method and device for receiving data |
| CN111435892A (en) * | 2019-01-11 | 2020-07-21 | 华为技术有限公司 | Method and device for receiving data |
| CN112787783A (en) * | 2019-11-08 | 2021-05-11 | 大唐移动通信设备有限公司 | Information feedback and retransmission method and terminal |
| 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 |
| CN113194440A (en) * | 2021-04-28 | 2021-07-30 | 西安电子科技大学 | Method for seizing transmission resources in Internet of vehicles |
| 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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