CN105636113A - Frequency point transmission quality detection method - Google Patents
Frequency point transmission quality detection method Download PDFInfo
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- CN105636113A CN105636113A CN201410612478.XA CN201410612478A CN105636113A CN 105636113 A CN105636113 A CN 105636113A CN 201410612478 A CN201410612478 A CN 201410612478A CN 105636113 A CN105636113 A CN 105636113A
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Abstract
The application discloses a frequency point transmission quality detection method. The method comprises that when current scheduling user equipment (UE) requires business data transmission, a base station allocates transmission resources for the UE and triggers the UE to enter a frequency point detection state; the base station transmits downlink detection signals to the UE continuously on the allocated working frequency points until preset detection ending conditions are met; the UE analyzes each of the received downlink detection signals, and feeds back analysis results to the base station; and the base station determines, according to the receiving quality of the feedback information by the UE and the analysis results, whether the working frequency points are available, and if so, the base station triggers the business data transmission and releases the to-be-detected working frequency point resources and notifies the UE otherwise. The invention can be used for accurately sensing the availability of the frequency points and ensuring the business transmission reliability of the scheduling UE.
Description
Technical field
The present invention relates to mobile communication technology, particularly relate to the detection method of a kind of frequency transmission quality.
Background technology
Along with developing rapidly of wireless communication technology, frequency spectrum resource becomes more and more nervous. Especially with the development of WLAN (WLAN) technology, wireless personal area network (WPAN) technology, increasing people accesses the Internet wirelessly by these technology. These network technologies are used mostly unauthorized band operation. Due to the fast development of WLAN, WRAN radio communication service, the unauthorized frequency range that these networks work is gradually saturated. And other communication service (such as visual broadcast service etc.) needs the protection that communication network offer is certain, make them from the interference of other communication services. In order to provide good protection, the specific mandate frequency range of frequency management department specific assigned uses for specific communication service. Compared with authorizing frequency range, the frequency spectrum resource of unauthorized frequency range to lack a lot (most frequency spectrum resource is all used to do mandate frequency range and uses). And the utilization rate of a considerable amount of mandate frequency spectrum resource is non-normally low. Then the fact has been occurred as soon as: the frequency spectrum resource of some part is relatively fewer but portfolio of carrying on it is very big, and the frequency spectrum resource utilization rate that other has authorized is very low. Therefore, it can reach a conclusion that the frequency spectrum resource allocation method based on current, the utilization rate having quite a few frequency spectrum resource is very low.
Cognitive radio technology is the radio communication new technique that the frequency spectrum resource caused for solving wireless data service growth is nervous. Being obtained by frequency spectrum perception and authorize frequency spectrum state, if being in idle condition, then cognitive system can re-use this frequency range, thus improving frequency spectrum service efficiency, meets broadband services transmission demand.
When cellular network adopts frequency spectrum perception, the up-downgoing interference level that the base station of cellular network and terminal are subject on frequency is different, and simple base station frequency spectrum perception result or the frequency spectrum perception result of terminal to report cannot correctly reflect the service condition of frequency. What current cognitive radio technology adopted is unidirectional cognition technology, namely by the energy size of frequency is carried out perception, if energy is low, then it is assumed that this frequency is in idle condition. This unidirectional cognition technology cannot correctly reflect the service condition of frequency. Further, since the coverage of the respective wireless signal transmitting-receiving of the feature of beehive net, base station and terminal has common factor but is not completely superposed, so base station and terminal, and the disturbed condition perceived between each terminal is not just the same. So for the frequency spectrum share under beehive net, (namely transmitting terminal perception is less than the existence of interference to there is substantial amounts of hidden node problem, but the impact that the receiving terminal of its communication can be interfered), communication interaction between base station and terminal reliable, it is necessary to be all absent from interference in the respective transceiving range of receiving-transmitting sides and just can reach. Therefore, the cellular network of existing introducing frequency spectrum perception technology, although introduce frequency spectrum perception technology, cannot the problem of the accurate service condition of perception frequency but exist. And, existing system is determine that available frequency (is only base station perception first with frequency spectrum perception technology, it is only terminal perception), then based on this, subscriber equipment is scheduling again, so, the inaccuracy of the available frequency owing to determining before dispatching, therefore, the transmission quality of the UE that is scheduled there will be the disabled situation of working frequency points, thus can be affected.
As can be seen here, in the cellular network of existing introducing frequency spectrum perception technology, owing to there is concealed nodes, and cause cannot the problem of accurate perception frequency availability, and then the transmission quality of the UE that is scheduled can be affected.
Summary of the invention
In view of this, present invention is primarily targeted at the detection method providing a kind of frequency transmission quality, the method can accurate perception frequency availability, it is ensured that dispatch the business transmission reliability of UE.
In order to achieve the above object, the technical scheme that the present invention proposes is:
A kind of detection method of frequency transmission quality, including:
When the user equipment (UE) of current scheduling needs to carry out business data transmission, base station is described UE allocation of transmission resources and triggers described UE entrance frequency acquisition mode;
Described base station sends downlink detecting signal to described UE continuously on institute's assignment frequency, until meeting the detection termination condition preset;
The each downlink detecting signal received is resolved by described UE, and feeds back analysis result to described base station;
Described base station is according to self quality of reception to described UE institute feedback information and described analysis result, judge whether described working frequency points can be used, carry out described business data transmission if it is, trigger, otherwise, discharge described working frequency points resource to be detected and notify described UE.
In sum, the detection method of the frequency transmission quality that the present invention proposes, when UE needs to carry out business data transmission, by the mutual handshake procedure between base station-terminal, availability detection is carried out targetedly to for its assignment frequency, when detecting frequency and being available, restart business data transmission process. So, it is possible to ensure, with less channel sounding overhead, the reliability that practical business transmits, the concealed nodes interference problem existed when honeycomb covers networking continuously can also be solved simultaneously.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the embodiment of the present invention one.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly, the present invention is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.
Consider for narrowband systems, terminal bandwidth is limited, once appreciable shared band scope is far fewer than base station, even if so adding end side perception, also there is also perception velocities slower, sensing results is reported obviously not catch up with the speed of scheduling resource distribution to the speed of base station decision-making, it is thus impossible to simply increase the network element participating in perception just can improve the accuracy of frequency perception.
The core concept of the present invention is: for each UE, when this UE has business datum (including upstream or downstream) to transmit demand, base station is when carrying out Grant for resource allocation to it, trigger the anticipation being carried out the working frequency points availability before business transmission by the mutual handshake procedure between base station-terminal, when judging that working frequency points is available, restart corresponding business data transmission process. So, the scheduling transmitted by business triggers, adopt the mode of first scheduling-perception again-last business transmission, targetedly the specific resources of certain UE is carried out availability detection, the reliability that practical business transmits can be ensured with less channel sounding overhead, the concealed nodes interference problem existed when honeycomb covers networking continuously can also be solved simultaneously, improve the reliability sharing frequency spectrum perception.
Fig. 1 is the schematic flow sheet of the embodiment of the present invention one, as it is shown in figure 1, this embodiment specifically includes that
Step 101, when the user equipment (UE) of current scheduling needs to carry out business data transmission, base station be described UE allocation of transmission resources and trigger described UE enter frequency acquisition mode.
This step is for, before UE carries out business data transmission, triggering UE and carry out frequency acquisition mode, namely start the availability detection process of working frequency points.
Here, business data transmission includes uplink business data transmission and downlink service data transmission, namely UE needs the situation carrying out business data transmission to include: when described UE sends uplink service request to described base station, or, when described base station needs to described UE transmission downlink service data.
It is preferred that base station is described UE allocation of transmission resources and triggers described UE entrance frequency acquisition mode, it is possible to adopt following step to realize:
Step x1, base station send descending scheduling authorization messages to described UE, carry the instruction information of detection frequency quality in described message.
Here, by increasing the instruction information of detection frequency quality in descending scheduling authorization messages, trigger UE and carry out frequency acquisition mode according to this instruction information. So, descending scheduling authorization messages, on the one hand for notifying the transfer resource that UE is its distribution, on the other hand, it is used for notifying that UE to carry out frequency detection.
After step x2, described UE receive described descending scheduling authorization messages, the instruction information according to described detection frequency quality therein, enter frequency acquisition mode; And descending scheduling license confirmation message is sent to described base station.
In this step, after the instruction information of UE detection frequency quality in row scheduling grant message being detected, namely know that the availability of the working frequency points configured first is detected by needs, recycle its transmission carrying out business datum when working frequency points is available.
Step 102, described base station send downlink detecting signal to described UE continuously on institute's assignment frequency, until meeting the detection termination condition preset.
Here, detection termination condition can be configured according to actual needs by those skilled in the art, and detection can know the real conditions of channel when terminating.
It is preferred that this detection termination condition can be: the number of times continuously transmitting downlink detecting signal reaches predetermined threshold value N.
Described threshold value N > 1, specifically can be configured by those skilled in the art according to actual needs, as long as can ensure that the transmission times of detectable signal can embody the real conditions of channel.
The each downlink detecting signal received is resolved by step 103, described UE, and feeds back analysis result to described base station.
In this step, UE needs the analysis result of downlink detecting signal is fed back to base station, in order to base station, based on this, carries out frequency availability judgement.
Preferably, in order to the other system base station or terminal reduced using same frequency interferes, when feeding back analysis result, the transmission of ACK information only can be carried out when resolving correct, when resolving mistake, then do not send any feedback signal, namely adopt the mode not sending out feedback signal to feed back nack message. Specifically, it is possible to adopt following step to realize:
If the described UE of step y1 to carry out described parsing correct, then send ACK information to described base station, otherwise, do not send and any feed back signal to described base station.
If the described base station of step y2 receives described ACK information, then judge that the described analysis result of correspondence is as correct, if described base station is not received by any feedback signal that described downlink detecting signal is corresponding, then judge that corresponding described analysis result is as mistake.
Here, if base station does not receive time point at corresponding feedback information after sending downlink detecting signal receives corresponding feedback information, then it is assumed that the analysis result of this downlink detecting signal is mistake.
Step 104, described base station are according to self quality of reception to described UE institute feedback information and described analysis result, judge whether described working frequency points can be used, carry out described business data transmission if it is, trigger, otherwise, discharge described working frequency points resource to be detected and notify described UE.
In this step, base station, by the feedback information according to UE, is operated the judgement of frequency availability, only when determining available, and the just startup of trigger business data transmission procedure, otherwise, it is necessary to carry out the release of resource.
It is preferred that following method can be adopted, judge whether described working frequency points can be used:
Described base station is according to all described analysis result received, determine the Block Error Rate (BLER) of described downlink detecting signal, according to this base station quality of reception to all described analysis results, estimate corresponding up signal to noise ratio (SNR), if described Block Error Rate more than default Block Error Rate thresholding or described signal to noise ratio snr lower than default signal-noise ratio threshold, described working frequency points then judges that described working frequency points is unavailable, otherwise, it is determined that can be used.
In above-mentioned determination methods, for descending channel conditions, utilize the analysis result of the UE downlink detecting signal fed back, corresponding descending block error rate BLER can be calculated; For up channel conditions, then can according to the base station quality of reception to the analysis result that UE sends, estimate corresponding up signal to noise ratio, so, as long as the channel conditions of upstream or downstream is undesirable just it is believed that this working frequency points of UE configuration is unavailable, such that it is able to avoid utilizing this disabled working frequency points to carry out business transmission.
Consider that in practical application, the feedback of ACK information is fed back on PUCCH, and the channel carrying out business data transmission is PUSCH, the reception condition to ACK information, can only indirectly utilize PUCCH to reflect the channel conditions of PUSCH. Therefore, further, in order to detect up channel conditions more accurately, UE while transmission ACK information is to described base station, can send uplink detection signal to described base station on the PUSCH that base station configures. Correspondingly, it is possible to adopt following method to judge whether described working frequency points can be used:
Described base station is according to all described analysis result received, determine the block error rate BLER of described downlink detecting signal, according to this base station quality of reception to all described uplink detection signals, estimate corresponding up signal to noise ratio snr, if described Block Error Rate more than default Block Error Rate thresholding or described signal to noise ratio snr lower than default signal-noise ratio threshold, described working frequency points then judges that described working frequency points is unavailable, otherwise, it is determined that can be used.
Preferably, the impact on UE business data transmission is sent in order to avoid downlink detecting signal and uplink detection signal, the form that can adopt empty bag builds these detectable signals, namely, described downlink detecting signal and uplink detection signal are empty packet, and it is transmitted with fixing MCS, namely sends during detectable signal, do not carry out MCS adjustment. So, owing to the packet of detectable signal is for filling data, even if so receiving and correctly also only arriving MAC layer, then abandoning, regular traffic data will not being used as and consign to high level.
It is preferred that can pass through to send the instruction information not detecting frequency quality to the mode of UE, triggering and carry out described business data transmission, concrete grammar is as follows:
Step z1, described base station send descending scheduling mandate to described UE in described working frequency points and open message or uplink scheduling authorization unlatching message, triggering and start described business transmitting procedure, message is opened in described descending scheduling mandate and described uplink scheduling authorization is opened in message and carried the instruction information not detecting frequency quality;
Step z2, described UE receive described descending scheduling mandate and open after message or uplink scheduling authorization open message, according to the instruction information not detecting frequency quality described in therein, enter business data transmission state.
In actual applications, in step 104 when detecting working frequency points and being unavailable, discharge described working frequency points resource to be detected and notify described UE, specifically can pass through to issue the mode closing authorization messages and realize.
In sum, these are only presently preferred embodiments of the present invention, be not intended to limit protection scope of the present invention. All within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (10)
1. the detection method of a frequency transmission quality, it is characterised in that including:
When the user equipment (UE) of current scheduling needs to carry out business data transmission, base station is described UE allocation of transmission resources and triggers described UE entrance frequency acquisition mode;
Described base station sends downlink detecting signal to described UE continuously on institute's assignment frequency, until meeting the detection termination condition preset;
The each downlink detecting signal received is resolved by described UE, and feeds back analysis result to described base station;
Described base station is according to self quality of reception to described UE institute feedback information and described analysis result, judge whether described working frequency points can be used, carry out described business data transmission if it is, trigger, otherwise, discharge described working frequency points resource to be detected and notify described UE.
2. method according to claim 1, it is characterised in that described base station be described UE allocation of transmission resources and trigger described UE enter frequency acquisition mode include:
Base station sends descending scheduling authorization messages to described UE, carries the instruction information of detection frequency quality in described message;
After described UE receives described descending scheduling authorization messages, the instruction information according to described detection frequency quality therein, enter frequency acquisition mode; And descending scheduling license confirmation message is sent to described base station.
3. method according to claim 1, it is characterised in that described detection termination condition includes: the number of times continuously transmitting downlink detecting signal reaches predetermined threshold value N.
4. method according to claim 1, it is characterised in that described feedback analysis result includes to described base station:
If described UE to carry out described parsing correct, then send ACK information to described base station, otherwise, do not send and any feed back signal to described base station;
If described base station receives described ACK information, then judge that the described analysis result of correspondence is as correct, if described base station is not received by any feedback signal that described downlink detecting signal is corresponding, then judge that corresponding described analysis result is as mistake.
5. method according to claim 1, it is characterised in that described judge whether described working frequency points can with including:
Described base station is according to all described analysis result received, determine the block error rate BLER of described downlink detecting signal, according to this base station quality of reception to all described analysis results, estimate corresponding up signal to noise ratio snr, if described Block Error Rate more than default Block Error Rate thresholding or described signal to noise ratio snr lower than default signal-noise ratio threshold, described working frequency points then judges that described working frequency points is unavailable, otherwise, it is determined that can be used.
6. method according to claim 4, it is characterised in that described method farther includes:
Described UE, while transmission ACK information is to described base station, sends uplink detection signal to described base station on the PUSCH that base station configures.
7. method according to claim 6, it is characterised in that described judge whether described working frequency points can with including:
Described base station is according to all described analysis result received, determine the block error rate BLER of described downlink detecting signal, according to this base station quality of reception to all described uplink detection signals, estimate corresponding up signal to noise ratio snr, if described Block Error Rate more than default Block Error Rate thresholding or described signal to noise ratio snr lower than default signal-noise ratio threshold, described working frequency points then judges that described working frequency points is unavailable, otherwise, it is determined that can be used.
8. method according to claim 1, it is characterised in that described downlink detecting signal is empty packet, and adopt fixing MCS to be transmitted.
9. method according to claim 5, it is characterised in that described downlink detecting signal and uplink detection signal are sky packet, and adopt fixing MCS to be transmitted.
10. method according to claim 1, it is characterised in that described triggering carries out described business data transmission and includes:
Described base station sends descending scheduling mandate to described UE in described working frequency points and opens message or uplink scheduling authorization unlatching message, triggering and start described business transmitting procedure, message is opened in described descending scheduling mandate and described uplink scheduling authorization is opened in message and carried the instruction information not detecting frequency quality;
Described UE receives described descending scheduling mandate and opens after message or uplink scheduling authorization open message, according to the instruction information not detecting frequency quality described in therein, enters business data transmission state.
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| CN107707335A (en) * | 2016-08-09 | 2018-02-16 | 中国移动通信集团内蒙古有限公司 | A kind of data transmission method and device |
| CN109560909A (en) * | 2018-11-29 | 2019-04-02 | 广州慧睿思通信息科技有限公司 | Target of eating dishes without rice or wine induces detection method, detecting devices and induces equipment |
| CN113132998A (en) * | 2020-01-15 | 2021-07-16 | 鹤壁天海电子信息系统有限公司 | Communication frequency point determination method, device, electronic equipment and medium |
| WO2022183878A1 (en) * | 2021-03-03 | 2022-09-09 | 中兴通讯股份有限公司 | Frequency band scheduling method, communication node, and computer-readable storage medium |
| CN117040609A (en) * | 2023-08-23 | 2023-11-10 | 北京慧清科技有限公司 | Single-antenna frequency-selecting diversity method suitable for scattering communication system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107707335A (en) * | 2016-08-09 | 2018-02-16 | 中国移动通信集团内蒙古有限公司 | A kind of data transmission method and device |
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