CN105636113B - A kind of detection method of frequency point transmission quality - Google Patents
A kind of detection method of frequency point transmission quality Download PDFInfo
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- CN105636113B CN105636113B CN201410612478.XA CN201410612478A CN105636113B CN 105636113 B CN105636113 B CN 105636113B CN 201410612478 A CN201410612478 A CN 201410612478A CN 105636113 B CN105636113 B CN 105636113B
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- base station
- frequency point
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Abstract
This application discloses a kind of detection methods of frequency point transmission quality, comprising: when the user equipment (UE) of current scheduling needs to carry out business data transmission, base station is the UE allocation of transmission resources and triggers the UE and enter frequency point acquisition mode；The base station continuously sends downlink detecting signal to the UE on institute's assignment frequency point, until meeting preset detection termination condition；The UE parses each downlink detecting signal received, and feeds back parsing result to the base station；The base station is according to itself quality of reception and the parsing result to UE institute feedback information, judge whether the working frequency points can be used, if it is, triggering carries out the business data transmission, otherwise, it discharges the working frequency points resource to be detected and notifies the UE.Frequency point availability can accurately be perceived using the present invention, it is ensured that dispatch the business transmission reliability of UE.
Description
Technical field
The present invention relates to mobile communication technologies, more particularly to a kind of detection method of frequency point transmission quality.
Background technique
With the rapid development of wireless communication technique, frequency spectrum resource becomes more and more nervous.Especially with wireless local area
The development of net (WLAN) technology, wireless personal area network (WPAN) technology, more and more people are by these technologies with wireless
Mode accesses internet.These network technologies use unauthorized band operation mostly.Due to WLAN, WRAN radio communication service
Fast development, the unauthorized frequency range that these networks are worked gradually is saturated.And (such as TV is wide for other communication service
Broadcast business etc.) need communication network to provide certain protection, make them from the interference of other communication services.It is good in order to provide
Protection, the specific authorized spectrum band of frequency management department specific assigned is for specific communication service use.With authorized spectrum band phase
Than the frequency spectrum resource of unauthorized frequency range will less very much (most frequency spectrum resource is used to do authorized spectrum band use).And phase
When the utilization rate of the authorization frequency spectrum resource of quantity is very low.Then there have been the facts: the frequency spectrum money of certain parts
Source is relatively fewer but the portfolio that carries thereon is very big, and the frequency spectrum resource utilization rate that other has authorized is very low.Therefore,
It can be concluded that such conclusion: based on current frequency spectrum resource allocation method, the utilization rate of quite a few frequency spectrum resource is
It is very low.
Cognitive radio technology is the wireless communication to solve frequency spectrum resource anxiety caused by wireless data service increases
New technology.Authorization frequency spectrum state is obtained by frequency spectrum perception, if be in idle condition, cognitive system can re-use this
Frequency range meets broadband services transmission demand to improve frequency spectrum service efficiency.
When cellular network uses frequency spectrum perception, the uplink and downlink that the base station of cellular network and terminal are subject on frequency point is interfered
Horizontal different, the frequency spectrum perception result that simple base station frequency spectrum perception result or terminal report can not correctly reflect frequency point
Service condition.Current cognitive radio technology using unidirectional cognition technology, i.e., by the energy size to frequency point into
Row perception, if energy is low, then it is assumed that the frequency point is in idle condition.The unidirectional cognition technology can not correctly reflect making for frequency point
Use situation.In addition, the characteristics of due to beehive net, the coverage area of base station and the respective wireless signal transmitting-receiving of terminal have intersection but
It is not completely coincident again, so the disturbed condition perceived between base station and terminal and each terminal is not fully.Institute
With for the frequency spectrum share under beehive net, there are a large amount of hidden node problem (i.e. transmitting terminal perception less than interference presence,
But receiving end of its communication will receive the influence of interference), communication interaction between base station and terminal it is reliable, need to receive and dispatch double
All there is no interference can just reach in the respective transceiving range in side.Therefore, the existing cellular network for introducing frequency spectrum perception technology,
Although introducing frequency spectrum perception technology, there are problems that accurately perceiving the service condition of frequency point.And in existing system
It is that available frequency point (only base station perception or only terminal perception) is determined first with frequency spectrum perception technology, so
User equipment is scheduled based on this again afterwards, in this way, by the inaccuracy for the available frequency point determined before dispatching, because
This, it may appear that the not available situation of working frequency points, to will affect the transmission quality of scheduled UE.
It can be seen that since there are concealed nodes, and causing in the existing cellular network for being introduced into frequency spectrum perception technology
The problem of frequency point availability can not accurately be perceived, and then will affect the transmission quality of scheduled UE.
Summary of the invention
In view of this, this method can the main purpose of the present invention is to provide a kind of detection method of frequency point transmission quality
Accurately to perceive frequency point availability, it is ensured that dispatch the business transmission reliability of UE.
In order to achieve the above object, technical solution proposed by the present invention are as follows:
A kind of detection method of frequency point transmission quality, comprising:
When the user equipment (UE) of current scheduling needs to carry out business data transmission, base station is the UE allocation of transmission resources
And it triggers the UE and enters frequency point acquisition mode；
The base station continuously sends downlink detecting signal to the UE on institute's assignment frequency point, default until meeting
Detection termination condition；
The UE parses each downlink detecting signal received, and feeds back parsing result to the base station；
The base station judges the work according to itself quality of reception and the parsing result to UE institute feedback information
Make whether frequency point can be used, if it is, triggering carries out the business data transmission, otherwise, discharges the working frequency points to be detected
Resource simultaneously notifies the UE.
In conclusion the detection method of frequency point transmission quality proposed by the present invention, needs to carry out business data transmission in UE
When, by the interaction handshake procedure between base station-terminal, availability spy targetedly is carried out to for its assignment frequency point
Survey, detect frequency point it is available when, restart business data transmission process.In this way, can be come with less channel sounding overhead
Guarantee the reliability of practical business transmission, while existing concealed nodes interference when honeycomb continuously covers networking can also be solved and asked
Topic.
Detailed description of the invention
Fig. 1 is the flow diagram of the embodiment of the present invention one.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, right below in conjunction with the accompanying drawings and the specific embodiments
The present invention is described in further detail.
In view of for narrowband systems, terminal bandwidth is limited, primary appreciable shared band range is far fewer than base
It stands, so it is slower that also there is also perception velocities even if terminal side perception is added, reports sensing results aobvious to the speed of base station decision
The speed of scheduling resource allocation is not caught up with so, it is thus impossible to which frequency point sense can be improved by simply increasing the network element participated in and perceived
The accuracy known.
Core of the invention thought is: for each UE, when the UE has business datum (including upstream or downstream) transmission to need
When asking, when carrying out Grant for resource allocation to it, triggering carries out industry by the interaction handshake procedure between base station-terminal for base station
The anticipation of working frequency points availability before business transmission restarts corresponding business data transmission when determining that working frequency points are available
Process.In this way, the scheduling by business transmission triggers, using first dispatch-perceive again-by the way of last business transmits, targetedly
Availability detection is carried out to the specific resources of some UE, can guarantee that practical business transmits with less channel sounding overhead
Reliability, while honeycomb can also be solved and continuously cover existing concealed nodes interference problem when networking, improve shared frequency spectrum
The reliability of perception.
Fig. 1 is the flow diagram of the embodiment of the present invention one, as shown in Figure 1, the embodiment specifically includes that
Step 101, when the user equipment (UE) of current scheduling needs to carry out business data transmission, base station be the UE distribution
Transfer resource simultaneously triggers the UE and enters frequency point acquisition mode.
This step is used for before UE carries out business data transmission, and triggering UE carries out frequency point acquisition mode, i.e. starting work frequency
The availability detection process of point.
Here, business data transmission includes uplink business data transmission and downlink service data transmission, i.e. UE needs to carry out
The case where business data transmission includes: when the UE sends uplink service request to the base station, alternatively, the base station needs
When sending downlink service data to the UE.
Preferably, base station is the UE allocation of transmission resources and triggers the UE and enter frequency point acquisition mode, can use
Following step is realized:
Step x1, base station sends descending scheduling authorization messages to the UE, and detection frequency point quality is carried in the message
Indicate information.
Here, by descending scheduling authorization messages increase detection frequency point quality instruction information, come trigger UE according to
The instruction information carries out frequency point acquisition mode.In this way, descending scheduling authorization messages, on the one hand for notifying UE for the biography of its distribution
Defeated resource, on the other hand, for notifying UE to carry out frequency point detection.
Step x2, after the described UE receives the descending scheduling authorization messages, according to the detection frequency point quality therein
Instruction information, into frequency point acquisition mode；And descending scheduling license confirmation message is sent to the base station.
In this step, UE is known after the instruction information for detecting the detection frequency point quality in row scheduling grant message
It needs first to detect the availability of the working frequency points configured, it is recycled to carry out business datum when working frequency points can be used
Transmission.
Step 102, the base station continuously send downlink detecting signal to the UE on institute's assignment frequency point, until
Meet preset detection termination condition.
Here, detection termination condition can be configured according to actual needs by those skilled in the art, energy at the end of detection
Know the real conditions of channel.
Preferably, the detection termination condition can be with are as follows: the number for continuously transmitting downlink detecting signal reaches preset threshold N.
Threshold value N > 1 can be specifically configured according to actual needs, as long as can ensure that detection by those skilled in the art
The transmission times of signal can embody the real conditions of channel.
Step 103, the UE parse each downlink detecting signal received, and feed back parsing result to described
Base station.
In this step, UE needs the parsing result of downlink detecting signal feeding back to base station, so that base station is based on this, carries out
The judgement of frequency point availability.
Preferably, being fed back to reduce to being interfered using the other systems base station of same frequency point or terminal
When parsing result, the transmission that ACK information can be only carried out when parsing correct does not send any feedback letter then when parsing is wrong
Number, that is, nack message is fed back by the way of do not send out feedback signal.Specifically, it can be realized using following step:
If it is correct that step y1, the described UE carries out the parsing, ACK information is sent to the base station, otherwise, is not sent
Any feedback signal gives the base station.
If step y2, the described base station receives the ACK information, determine the corresponding parsing result be it is correct,
If the base station is not received by the corresponding any feedback signal of the downlink detecting signal, the corresponding parsing is determined
It as a result is mistake.
Here, if base station does not receive phase in corresponding feedback information receiving time point after sending downlink detecting signal
The feedback information answered, then it is assumed that the parsing result of the downlink detecting signal is mistake.
Step 104, the base station are sentenced according to itself quality of reception and the parsing result to UE institute feedback information
Whether the working frequency points of breaking can be used, if it is, triggering carries out the business data transmission, otherwise, discharge described to be detected
Working frequency points resource simultaneously notifies the UE.
In this step, base station will be according to the feedback information of UE, the judgement of Lai Jinhang working frequency points availability, only in determination
When can be used out, otherwise the starting for just triggering business data transmission process needs to carry out the release of resource.
Preferably, following methods can be used, to judge whether the working frequency points can be used:
The base station determines the Block Error Rate of the downlink detecting signal according to all parsing results received
(BLER), corresponding uplink signal-to-noise ratio (SNR) is estimated to the quality of reception of all parsing results according to this base station, if
The Block Error Rate is greater than preset Block Error Rate thresholding or the Signal to Noise Ratio (SNR) is lower than preset signal-noise ratio threshold, then determines institute
It is unavailable to state working frequency points, otherwise, it is determined that the working frequency points are available.
In above-mentioned judgment method, for the channel conditions of downlink, using the parsing result of the downlink detecting signal of UE feedback,
Corresponding downlink block error rate BLER can be calculated；For the channel conditions of uplink, then the solution that UE can be sent according to base station
The quality of reception for analysing result, to estimate corresponding uplink signal-to-noise ratio, as long as in this way, the channel conditions of upstream or downstream are not met
It is required that can think that the working frequency points of UE configuration are unavailable, so as to avoid carrying out using the not available working frequency points
Business transmission.
In view of the feedback of ACK information in practical application is to feed back on PUCCH, and carry out the letter of business data transmission
Road is PUSCH, and to the reception condition of ACK information, the channel conditions of PUSCH can only be indirectly reflected using PUCCH.Therefore,
Further, in order to more accurately detect the channel conditions of uplink, UE can send ACK information to the same of the base station
When, uplink detection signal is sent on the PUSCH that base station is configured to the base station.Correspondingly, can be sentenced using following methods
Whether the working frequency points of breaking can be used:
The base station determines the Block Error Rate of the downlink detecting signal according to all parsing results received
BLER estimates corresponding uplink Signal to Noise Ratio (SNR) according to this base station to the quality of reception of all uplink detection signals, if
The Block Error Rate is greater than preset Block Error Rate thresholding or the Signal to Noise Ratio (SNR) is lower than preset signal-noise ratio threshold, then determines institute
It is unavailable to state working frequency points, otherwise, it is determined that the working frequency points are available.
Preferably, in order to avoid downlink detecting signal and uplink detection signal transmission to the shadow of UE business data transmission
It rings, it can be using constructing these detectable signals in the form of empty packet, that is, the downlink detecting signal and uplink detection signal are sky number
It is sent according to packet, and to fix MCS, i.e., during transmission detectable signal, is adjusted without MCS.In this way, due to detectable signal
Data packet be then filling data abandon so only arriving MAC layer receiving correct, will not be as regular traffic data
Consign to high level.
Preferably, can be by way of sending the instruction information for not detecting frequency point quality to UE, triggering carries out the industry
Data of being engaged in transmission, the specific method is as follows:
Step z1, the described base station in the working frequency points to the UE send descending scheduling authorization open message or on
Row scheduling authorization opens message, and triggering starts the business transmission process, the descending scheduling authorization open message and it is described on
Row scheduling authorization is opened in message and carries the instruction information for not detecting frequency point quality；
Step z2, the described UE receives the descending scheduling authorization and opens message or uplink scheduling authorization unlatching message
Afterwards, according to the instruction information for not detecting frequency point quality therein, into business data transmission state.
In practical applications, in step 104 detect working frequency points it is unavailable when, discharge the working frequency points to be detected
Resource simultaneously notifies the UE, can specifically be realized by way of issuing and closing authorization messages.
In conclusion the above is merely preferred embodiments of the present invention, being not intended to limit the scope of the present invention.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (10)
1. a kind of detection method of frequency point transmission quality characterized by comprising
When the user equipment (UE) of current scheduling needs to carry out business data transmission, base station is the UE allocation of transmission resources and touches
Sending out UE described enters frequency point acquisition mode；
The base station continuously sends downlink detecting signal to the UE on institute's assignment frequency point, until meeting preset spy
Termination condition is surveyed, the downlink detecting signal is empty data packet, and is sent using fixed MCS；
The UE parses each downlink detecting signal received, and feeds back parsing result to the base station；
The base station judges the work frequency according to itself quality of reception and the parsing result to UE institute feedback information
Whether point can be used, if it is, triggering carries out the business data transmission, otherwise, discharge described in working frequency points resource and notice
UE。
2. the method according to claim 1, wherein the UE allocation of transmission resources is in the base station and triggers institute
It states UE and enters frequency point acquisition mode and include:
Base station sends descending scheduling authorization messages to the UE, and the instruction information of detection frequency point quality is carried in the message；
After the UE receives the descending scheduling authorization messages, according to it is therein it is described detection frequency point quality instruction information,
Into frequency point acquisition mode；And descending scheduling license confirmation message is sent to the base station.
3. the method according to claim 1, wherein the detection termination condition includes: to continuously transmit downlink spy
The number for surveying signal reaches preset threshold N.
4. the method according to claim 1, wherein the feedback parsing result includes: to the base station
If it is correct that the UE carries out the parsing, ACK information is sent to the base station, otherwise, does not send any feedback letter
Number give the base station；
If the base station receives the ACK information, determine the corresponding parsing result be it is correct, if the base station
It is not received by the corresponding any feedback signal of the downlink detecting signal, then determines that the corresponding parsing result is mistake.
5. judging whether the working frequency points are available the method according to claim 1, wherein described and including:
The base station determines the block error rate BLER of the downlink detecting signal, root according to all parsing results received
According to this base station to the quality of reception of all parsing results, corresponding uplink Signal to Noise Ratio (SNR) is estimated, if the Block Error Rate is big
It is lower than preset signal-noise ratio threshold in preset Block Error Rate thresholding or the Signal to Noise Ratio (SNR), then determines the working frequency points not
It can use, otherwise, it is determined that the working frequency points are available.
6. according to the method described in claim 4, it is characterized in that, the method further includes:
The UE sends uplink detection signal on the PUSCH that base station is configured while sending ACK information to the base station
To the base station.
7. according to the method described in claim 6, it is characterized in that, described judge whether the working frequency points are available and include:
The base station determines the block error rate BLER of the downlink detecting signal, root according to all parsing results received
According to this base station to the quality of reception of all uplink detection signals, corresponding uplink Signal to Noise Ratio (SNR) is estimated, if the accidentally block
Rate is greater than preset Block Error Rate thresholding or the Signal to Noise Ratio (SNR) is lower than preset signal-noise ratio threshold, then determines the work frequency
Point is unavailable, otherwise, it is determined that the working frequency points are available.
8. the method according to claim 1, wherein the downlink detecting signal is empty data packet, and using solid
Determine MCS to be sent.
9. according to the method described in claim 6, it is characterized in that, the uplink detection signal is sky data packet, and using
Fixed MCS is sent.
10. the method according to claim 1, wherein the triggering progress business data transmission includes:
The base station sends descending scheduling authorization to the UE in the working frequency points and opens message or uplink scheduling authorization
Message is opened, triggering starts the business transmission process, and message and the uplink scheduling authorization are opened in the descending scheduling authorization
It opens in message and carries the instruction information for not detecting frequency point quality；
After the UE receives the descending scheduling authorization unlatching message or uplink scheduling authorization unlatching message, according to therein
The instruction information for not detecting frequency point quality, into business data transmission state.
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| CN107707335B (en) * | 2016-08-09 | 2021-07-06 | 中国移动通信集团内蒙古有限公司 | 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 |
| CN115038124A (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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101895895A (en) * | 2010-08-03 | 2010-11-24 | 北京邮电大学 | Method and device for sensing graded frequency spectra in cognitive radio network |
| CN101902251A (en) * | 2010-08-06 | 2010-12-01 | 北京邮电大学 | Method and system for detecting cooperative spectrum based on LTE |
| CN102547795A (en) * | 2012-02-14 | 2012-07-04 | 华中科技大学 | Adaptive frequency spectrum sensing and scheduling method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8155033B2 (en) * | 2007-11-28 | 2012-04-10 | Motorola Solutions, Inc. | Opportunistic spectrum sensing optimization for a communication system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101895895A (en) * | 2010-08-03 | 2010-11-24 | 北京邮电大学 | Method and device for sensing graded frequency spectra in cognitive radio network |
| CN101902251A (en) * | 2010-08-06 | 2010-12-01 | 北京邮电大学 | Method and system for detecting cooperative spectrum based on LTE |
| CN102547795A (en) * | 2012-02-14 | 2012-07-04 | 华中科技大学 | Adaptive frequency spectrum sensing and scheduling method |
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