CN101959297A - Transmission power regulating method and device for communication system - Google Patents
Transmission power regulating method and device for communication system Download PDFInfo
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- CN101959297A CN101959297A CN2009101607082A CN200910160708A CN101959297A CN 101959297 A CN101959297 A CN 101959297A CN 2009101607082 A CN2009101607082 A CN 2009101607082A CN 200910160708 A CN200910160708 A CN 200910160708A CN 101959297 A CN101959297 A CN 101959297A
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Abstract
The invention discloses a transmission power regulating method and a transmission power regulating device for a communication system. The communication system comprises a first end point and a second end point. The method comprises: in the initial stage of a unit time period or the unit time period, allowing the first end point to transmit an RTS package serving as a detection package to the second end point in turn according to a plurality of different transmission powers; judging a detection package at a certain transmission power for determining if generating a CTS package influencing the first end point from the second end point, counting CTS package response times and calculating a counted value; and finally, judging if the statistic value is grater than a threshold and providing a basis for next transmission power transmission.
Description
Technical field
The invention relates to a kind of communication system, particularly about a kind of through-put power method of adjustment in communication system.
Background technology
Wireless telecommunications are meant that at least two end points (endpoint) are in the technology that does not have can transmit under circuit (wire) use.With regard to regard to communication field, wireless telecommunications be considered as basically telecommunication (
Telecommunication) a branch.Extensible ground, wireless telecommunications are in application facet, and the communication, point-to-multipoint (point-to-multipoint) communication, mobile phone or other the wireless network that comprise point-to-point (point-to-point) are used.
In wireless application, it is considerable adjusting through-put power effectively.When two end-point distances are nearer, reduce through-put power and can further reduce outside the consumption of power supply, also can reduce by thousand and disturb the use of other wireless device, and strengthen the compatibility of wireless device.
Existing through-put power adjustment technology is that utilization receives that it (is that (received signal strength indication, RSSI) index is carried out the adjustment of through-put power according to the indication of received signal intensity in other words, that the signal strength signal intensity of merit one end points is estimated distance.Yet, when two end end points all have automatic adjustment through-put power machine-processed, owing to two end end points are all being estimated distance and adjusted through-put power and cause the end points of two ends all to estimate inaccurate erroneous judgement the by accident.
Therefore, if can propose a kind of method that is used for the adjustment through-put power of wireless network and its needs be arranged with the shortcoming of improving known technology.
Summary of the invention
One of purpose of the present invention is to propose a kind of through-put power method of adjustment that is used for wireless network, to improve the shortcoming of known technology.
The invention provides a kind of method of adjustment that is applied to communication system, this communication system includes one first end points and one second end points, and this method comprises the following step: this first end points transmits one in regular turn according to a plurality of different through-put powers and detects package to this second end points; Reception is from a response package of this second end points, and wherein, this response package is corresponding to one of them of this a plurality of through-put powers; According to from this response package of this second end points to obtain a statistical value; And analyze this statistical value and transmit at least one data packet to this second end points with at least one of this a plurality of different through-put powers with decision.
The present invention also provides a kind of method of adjustment that is applied to communication system, this communication system includes one first end points and one second end points, this method comprises the following step: in a present time interval, this first end points transmits one in regular turn according to a plurality of different through-put powers and detects package to this second end points; Reception is from a response package of this second end points, and wherein, this response package is corresponding to one of them of this a plurality of through-put powers; According to from this response package of this second end points to obtain a statistical value; And analyze this statistical value with decision once in the time interval this first end points be sent to the through-put power of this second end points.
The present invention also provides a kind of method of adjustment that is applied to communication system, this communication system includes one first end points and one second end points, this method comprises the following step: this first end points carries out data packet according to traffic-meter lattice to this second end points and transmits, wherein these traffic-meter lattice include many group transmission information, and every group of transport packet contains a through-put power and a transmission rate; Reception is from a response package of this second end points, and wherein, this response package is corresponding to one of them of this a plurality of transmission information; Add up this response package to obtain a statistical value; And analyze this statistical value to upgrade this traffic-meter lattice.
The present invention also provides a kind of method of adjustment that is applied to communication system, this communication system includes one first end points and one second end points, this method comprises the following step: this first end points carries out a data packet according to traffic-meter lattice that comprise many group transmission information to this second end points and transmits, and wherein every group of transport packet contains the one at least of a through-put power and a transmission rate; Reception is from a response package of this second end points, and wherein, this response package is corresponding to one of them of this a plurality of transmission information; Add up these response packages to obtain a statistical value; And analyze this statistical value to adjust this traffic-meter lattice.
Description of drawings
Fig. 1 a is the schematic diagram of the adjustment through-put power of first embodiment of the invention.
Fig. 1 b is the flow chart of the adjustment through-put power of first embodiment of the invention.
Fig. 2 a is the schematic diagram of the adjustment through-put power of second embodiment of the invention.
Fig. 2 b is the flow chart of the adjustment through-put power of third embodiment of the invention.
Fig. 3 a is the schematic diagram of the adjustment through-put power of fourth embodiment of the invention.
Fig. 3 b is for showing traffic-meter lattice that comprise many group transmission information, and wherein every group of transport packet contains a transmit power level and a transmission rate.
Fig. 3 c is the flow chart of the adjustment through-put power of fourth embodiment of the invention.
[main element label declaration]
200: in the starting stage, this terminal A transmits one in regular turn according to a plurality of different transmit power level and detects package to this terminal B
210: a response package that produces this terminal A of response from this terminal B
220: add up these response packages to obtain a statistical value
230: analyze this statistical value and what transmit power level to transmit at least one data packet with to this terminal B with decision
300: in a present unit interval, this terminal A transmits one in regular turn according to a plurality of different transmit power level and detects package to this terminal B
310: this terminal B produces a response package of this terminal A of response
320: after this present unit interval end, add up these response packages to obtain a statistical value
330: analyze this statistical value is sent to this terminal B with decision this terminal A in next unit interval a plurality of different transmit power level
400: in a present unit interval, this terminal A is carried out a data packet according to traffic-meter lattice that comprise many group transmission information to this terminal B and is transmitted
410: this terminal B produces an ACK package of this terminal A of response
420: after this present unit interval, add up these ACK packages to obtain a statistical value
430: after this present unit interval end, analyze this statistical value to upgrade the traffic-meter lattice
Embodiment
In first embodiment, see also Fig. 1 a and Fig. 1 b.Fig. 1 a is the starting stage in a unit interval (also being referred to as training (train) flow process), adjusts the schematic diagram of through-put power in the mechanism of a terminal B by wireless network protocol (for example being 802.11) RTS/CTS of a terminal A and the segment distance of being separated by.Fig. 1 b is the method flow diagram of the adjustment through-put power of the present invention's first preferred embodiment.The mechanism of so-called RTS/CTS, promptly be that this terminal A is sent RTS (Request to Send) Request Packet earlier before transmitting data, this terminal B is when receiving this RTS package, this terminal B can be sent CTS (Clear toSend) package, tell this terminal A can send data and tell other wireless device during this period of time can not transmit any data, to avoid collision.
Before describing, a plurality of different through-put powers that elder generation's this terminal A of hypothesis is sent to this terminal B are divided into three grades (low transmission power grade L1, middle transmit power level L2, large transmission power grade L3).Certainly, can be divided into other grade, not exceed with Three Estate.
In first embodiment, initially, be not familiar with under the situation of the required transmit power level of this terminal B as yet in this terminal A, in step 200, in the starting stage of this unit interval (1s) (10ms), this terminal A transmits in regular turn as one according to a plurality of different transmit power level and detects the RTS package of package to this terminal B, produce the CTS package that is used to respond this terminal A until this terminal B, that is to say, this terminal A is sent to this terminal B according to a low transmission power grade L1 by the RTS package that this communications protocol will contain the control information (control information) of a target location (destination addresses, this refers to this terminal B).At this moment, in step 210, this terminal B is for receiving power M1 and being preset in a predetermined received power critical value M in this terminal B and judging a CTS package that whether produces this terminal A of response with decision from this terminal B from the RTS package (having passed through channel attenuation) of this low transmission power grade L1 of this terminal A.If terminal B is not received the RTS package of this low transmission power grade L1, then surely not produce a CTS package of this terminal A of response.
Be no more than this predetermined received power critical value M when this terminal B receives power M1 because of this, and do not produce this CTS package of this terminal A of response.Treat behind the scheduled unit time and this terminal A is not received the CTS package, get back in the step 200, this terminal A according to than the big one-level of this low transmission power grade L1 one in transmit power level L2, by this communications protocol one RTS package is sent to this terminal B.At this moment, in step 210, this terminal B is for receiving power M2 and the CTS package that whether produces this terminal A of response with decision from this terminal B of should predetermined received power critical value M judging that is preset in this terminal B from the RTS package (having passed through channel attenuation) of the middle transmit power level L2 of this terminal A.
Be no more than this predetermined received power critical value M when this terminal B because receive power M2, and do not produce this CTS package of this terminal A of response corresponding to this of the RTS package of transmit power level L2 in this.After treating a scheduled unit time and this terminal A when not receiving the CTS package, then to return in the step 200, this terminal A is sent to this terminal B by this communications protocol with a RTS package according to the large transmission power grade L3 than the defeated big one-level of power grade L2 in this.At this moment, in step 210, this terminal B receives power M3 and is preset in interior should the judging to determine whether produce a CTS package that responds this terminal A from this terminal B by predetermined received power critical value M of this terminal B for the RTS package (having passed through channel attenuation) of failing power grade L3 from this height of this terminal A.
Because this receives power M3 more than or equal to this predetermined received power critical value M, and produce one the one CTS package of this terminal A of response when this terminal B.The one CTS package is transferred into this terminal A by this communications protocol from this terminal B.Need to understand ground; the present invention utilizes IEEE 802.11 to use the communication of RTS/CTS package; in the safety transmission of protecting a data packet; this terminal A transmits remainder certificate (null data) package to this terminal B by this communications protocol, and this terminal B is understood back an ACK package (acknowledge packet) to this terminal A after receiving remainder certificate (null data) package.Under this situation, after this terminal A is received this CTS package and transmit this remainder according to package after, this terminal A transmits one in regular turn according to a plurality of different through-put powers again and detects package to this terminal B, that is, this terminal A is foundation one low transmission power grade L1 again, and by this communications protocol the RTS package is sent to this terminal B.
One embodiment, this received power critical value M in this terminal B keep certain.Another embodiment, this the received power critical value M of this terminal B foundation in this terminal B can be along with a plurality of different transmit power level of terminal A, and the distance of the distance between this terminal B and this terminal A and dynamically change the numerical values recited of this received power critical value M, based on the aforementioned condition narration, whether produce a CTS package that responds this terminal A from this terminal B with decision.
Is but that a received power grade is that (in other words, M2＞=M), this terminal B produces a CTS package of this terminal A of response to example with this terminal B for the received power M2 of RTS package behind channel attenuation that the tool from this terminal A is somebody's turn to do middle transmit power level L2.Afterwards, this CTS package is transferred into this terminal A by this communications protocol from this terminal B.This terminal A just transmits remainder certificate (null data) package to this terminal B by this communications protocol after receiving this CTS package.
In starting stage in a unit interval, after this terminal A reception transmits this CTS package from this terminal B, meeting is execution in step 200 (this terminal A transmits in regular turn as according to a plurality of different through-put powers and detects the RTS package of package to this terminal B) constantly, execution in step 200 is to step 210, this terminal B is judged according to predetermined this received power critical value M of this terminal B whether produce a CTS package that responds this terminal A from this terminal B with decision again.
The starting stage (10ms) later, execution in step 220 is added up these CTS packages to obtain a statistical value, sees form 1.
Execution in step 230 is analyzed this statistical value to determine this terminal A after this starting stage, which kind of through-put power to transmit at least one data packet to this terminal B according to.The mode of analyzing this statistical value has many kinds.For example: compare the number of times of each transmit power level, then according to form 1, L2 is more appropriate through-put power; Again for example: but ask for the ratio of the corresponding C TS of transmit power level institute package number of times for the percentage of overall response CTS package number of times, whether greater than a threshold value (is example with 75%), the ratio that then ratio of L1 is 3/20, the ratio of L2 is (3+11)/20, L3 is (3+12+6)/20, because the ratio of L2 is 70% not greater than threshold value, so L3 is more appropriate through-put power.
In a second embodiment, see also Fig. 2 a and Fig. 2 b.Wherein Fig. 2 a is in a unit interval, adjusts the schematic diagram of through-put power in the mechanism of a terminal B by wireless network protocol (for example being 802.11) RTS/CTS of a terminal A and the segment distance of being separated by.Fig. 2 b is the method flow diagram of the adjustment through-put power of the present invention's second preferred embodiment.
Initially, be not familiar with under the situation of the required transmit power level of this terminal B as yet in this terminal A, in step 300, be in this present unit interval (for example being 1s), this terminal A transmits as a RTS package that detects package to this terminal B in regular turn according to a plurality of different through-put powers, that is this terminal A is sent to this terminal B according to a low transmission power grade L1 with this RTS package.At this moment, in step 310, this terminal B (is M1=L1-P for the RTS package from this low transmission power grade L1 of this terminal A through the received power M1 of channel attenuation, wherein, P is the power of channel attenuation) be preset in that a predetermined received power M judges in this terminal B, whether produce a CTS package of this terminal A of response from this terminal B with decision.
Ground is known by institute, and this terminal B receives power M1 because of this and is no more than this predetermined received power M, and does not produce this CTS package of this terminal A of response.Treat behind the scheduled unit time and this terminal A is not received the CTS package, get back in the step 300, this terminal A according to than the big one-level of this low transmission power grade L1 one in transmit power level L2, by this communications protocol one RTS package is sent to this terminal B.
At this moment, in step 310, this terminal B is for receiving power M2 from one of the RTS package (having passed through channel attenuation) of failing power grade L2 in this terminal A and being preset in interior should the judging by predetermined received power M of this terminal B, to determine whether produce a CTS package that responds this terminal A from this terminal B.
Utilize the communication of RTS/CTS package for IEEE 802.11, in transmitting with the safety of protecting a data packet, this terminal A can by this communications protocol transmit a data packet (data packet) to this terminal B to carry out the transmission of data.In the 3rd embodiment, can be in conjunction with first embodiment and second embodiment.These CTS packages result who just adds up in a second embodiment in this unit interval (1s) is to determine the through-put power of next unit interval.
For example: after this present unit interval (1s), add up these CTS packages, see form 2 to obtain a statistical value.
| Low transmission power grade L1 | Middle transmit power level L2 | Large transmission power grade L3 |
| CTS package: 50 times | CTS package: 1000 times | CTS package: 1500 times |
Whether execution in step 330 judges this statistical value greater than a threshold value, is sent to a plurality of different transmit power level of this terminal B with decision this terminal A in next unit interval (1s).
For example: after this present unit interval, analyze according to the CTS package statistics number in the form 2 for this terminal A, that is the pairing transmit power level of CTS package of crossing low number of times no longer is that this terminal A of training transmits the required transmit power level of RTS package in next unit interval.In other words, temporarily do not use the through-put power of impossible usefulness.With form 2 is example, because the number of times low excessively (far below other number of times) of the CTS package of L1 does not then use L1 in the next unit interval.
See also Fig. 3 a, it is the method schematic diagram of the adjustment through-put power of the present invention's the 4th preferred embodiment.Shown in Fig. 3 a, this terminal A transmits a data packet to this terminal B according to traffic-meter lattice (shown in Fig. 3 b) that comprise many group transmission information, this terminal B determines whether to produce from this terminal B a response package (confirming that with a package (acknowledgepacket) is a typical example) of this terminal A of response according to a specific transmission information, as this terminal A this data packet is sent to the preferable transmit power level of the selection of this terminal B and the foundation of transmission rate.
Under the WLAN environment, this terminal A and this terminal B are carried out the message transmission by a communications protocol that meets the IEEE of the Institute of Electrical and Electronics Engineers (IEEE) (IEEE) 802.11 wireless network standards.These transmission rate grades in this form meet IEEE 802.11 standards, IEEE 802.11a standard, IEEE 802.11b standard, IEEE 802.11g standard, IEEE 802.11i standard or IEEE 802.11n standard, and these transmission information in this form are adjusted according to " automatic rate adjustment (auto-rate fall back) ".
See also Fig. 3 b and Fig. 3 c (this figure is the method flow diagram of the adjustment through-put power of the present invention's the 4th preferred embodiment), in step 400, in a present unit interval (2 μ s), this terminal A is carried out a data packet according to traffic-meter lattice (as Fig. 3 b) that comprise many group transmission information to this terminal B and is transmitted, and wherein every group of transport packet contains a through-put power and a transmission rate.
By these traffic-meter lattice as can be known, this terminal A is sent to this terminal B by this communications protocol with a data packet with a high-speed transfer speed and a low transmission power in the TRY#1 index.
In step 410, judge in a specific transmission information whether this terminal B produces a response package (in other words, whether this terminal A receives the response package from this terminal B) of this terminal A of response.If in after the scheduled time and this terminal A do not receive when this terminal B produces a response package of this terminal A of response, then terminal A is sent to this terminal B by this communications protocol with a data packet according to through-put power in the high-speed transfer speed and one in the TRY# 2 index of this form.So far, if the transmission information in this TRY# 2 index is a transmission information that receives for this terminal B, then this terminal B confirms that with one package ACK is sent to this terminal A by this communications protocol.Then, this terminal A comes back to step 400.
Need to explain ground, because being preset in this specific transmission information critical value in this terminal B can keep and fix or can or closely and dynamically change numerical values recited along with distance between this terminal B and this terminal A, therefore when this terminal A receive transmit from this terminal B one confirm package ACK after, this terminal A can re-execute step 400 to rapid 410 after this present unit interval end.
In step 420, after this present unit interval, add up these and confirm that package ACK is to obtain a statistical value.
In step 430, after this present unit interval end, analyze this statistical value to upgrade the traffic-meter lattice of next unit interval.For example: temporarily remove some TRY.For example: whether the statistical value of judging this TRY#N respectively is greater than a threshold value, with decision employed another traffic-meter lattice in next unit interval.For example: for being indexed at TRY# 1 in the TRY#7 index when occurring confirming the package number of times less than a threshold value, then the pairing transmission information of index can not appear in employed another traffic-meter lattice in this next unit interval.In addition, can distinguish the statistical value of this through-put power and this transmission rate again, for example: the total degree of low transmission power is very few, does not then use the TRY# 1 of the low transmission power in the traffic-meter lattice in the next unit interval; Again for example: the total degree of high-speed transfer speed is very few, does not then use the TRY# 1～TRY#4 of high-speed transfer speed in the traffic-meter lattice of next unit interval.
In this embodiment, be in this present unit interval, this terminal A to be carried out the training of transmission information.Yet the training of transmission information also can be carried out in the starting stage of a unit interval.Moreover under WLAN, this terminal A transmits a data packet to the required preferable transmission rate of this terminal B by this communications protocol certainly, also can step 300 to the step 330 to step 230 and Fig. 2 b draw from the step 200 of Fig. 1 b.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; any those skilled in the art; without departing from the spirit and scope of the present invention; when can doing various changes and retouching, so protection scope of the present invention is as the criterion when looking appended the claim scope person of defining.
Claims (27)
1. method of adjustment that is applied to communication system, this communication system includes one first end points and one second end points, and this method comprises the following step:
This first end points transmits one in regular turn according to a plurality of different through-put powers and detects package to this second end points; Reception is from a response package of this second end points, and wherein, this response package is corresponding to one of them of this a plurality of through-put powers;
According to from this response package of this second end points to obtain a statistical value; And
Analyze this statistical value and transmit at least one data packet to this second end points with at least one of this a plurality of different through-put powers with decision.
2. method according to claim 1, wherein this first end points carries out the message transmission by a communications protocol with this second end points.
3. method according to claim 2, wherein this communications protocol meets the IEEE of the Institute of Electrical and Electronics Engineers (IEEE) 802.11 wireless network standards.
4. method according to claim 1, wherein this detection package is that a request transmits package.
5. method according to claim 1, wherein this response package is that an approval transmits package.
6. method according to claim 1, wherein, behind this response package that receives from this second end points, this first end points transmits a remainder according to package.
7. method according to claim 1, wherein behind this response package that receives from this second end points, this first end points transmits this detection package to this second end points in regular turn according to these a plurality of different transmit power level again.
8. method according to claim 1, wherein the method for this adjustment through-put power is applied in WLAN or radio wide area network.
9. method according to claim 1, wherein this detection package contains an address information of this second end points at least.
10. method according to claim 1, wherein to transmit this detection package in regular turn according to a plurality of different through-put powers be to be minimal to a maximum transmission power grade from one to transmit this detection package in regular turn for this first end points.
11. a method of adjustment that is applied to communication system, this communication system include one first end points and one second end points, this method comprises the following step:
In a present time interval, this first end points transmits one in regular turn according to a plurality of different through-put powers and detects package to this second end points;
Reception is from a response package of this second end points, and wherein, this response package is corresponding to one of them of this a plurality of through-put powers;
According to from this response package of this second end points to obtain a statistical value; And
Analyze this statistical value with decision once in the time interval this first end points be sent to the through-put power of this second end points.
12. method according to claim 11, wherein this first end points carries out the message transmission by a communications protocol with this second end points.
13. method according to claim 12, wherein this communications protocol meets the IEEE of the Institute of Electrical and Electronics Engineers (IEEE) 802.11 wireless network standards.
14. method according to claim 11, wherein this detection package is that a request transmits package.
15. method according to claim 11, wherein this response package is that an approval transmits package.
16. method according to claim 11, when wherein this second end points produced this response package of this terminal A of response, this first end points transmitted a data packet.
17. method according to claim 11, wherein after this first end points was received this response package, this first end points transmitted one in regular turn according to a plurality of different through-put powers again and detects package to this second end points.
18. method according to claim 11, wherein the method for this adjustment through-put power is applied in WLAN or radio wide area network.
19. method according to claim 11, wherein this detection package contains an address information of this second end points at least.
20. method according to claim 11, wherein these different through-put powers are to be minimal to a maximum transmission power ranking compositor from one.
21. a method of adjustment that is applied to communication system, this communication system include one first end points and one second end points, this method comprises the following step:
This first end points carries out data packet according to traffic-meter lattice to this second end points and transmits, and wherein these traffic-meter lattice include many group transmission information, and every group of transport packet contains a through-put power and a transmission rate;
Reception is from a response package of this second end points, and wherein, this response package is corresponding to one of them of this a plurality of transmission information;
Add up this response package to obtain a statistical value; And
Analyze this statistical value to upgrade this traffic-meter lattice.
22. method according to claim 21, wherein this first end points carries out the message transmission by a communications protocol with this second end points.
23. method according to claim 22, wherein this communications protocol meets the IEEE of the Institute of Electrical and Electronics Engineers (IEEE) 802.11 wireless network standards.
24. control method according to claim 21, wherein this response package is an approval package.
25. method according to claim 21, wherein this transmission rate of every group of transmission information is to meet IEEE 802.11 relevant criterion.
26. method according to claim 21 is to adjust according to an automatic rate adjustment mechanism for this transmission information in these traffic-meter lattice wherein.
27. a method of adjustment that is applied to communication system, this communication system include one first end points and one second end points, this method comprises the following step:
This first end points carries out a data packet according to traffic-meter lattice that comprise many group transmission information to this second end points and transmits, and wherein every group of transport packet contains the one at least of a through-put power and a transmission rate;
Reception is from a response package of this second end points, and wherein, this response package is corresponding to one of them of this a plurality of transmission information;
Add up these response packages to obtain a statistical value; And
Analyze this statistical value to adjust this traffic-meter lattice.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103475426A (en) * | 2012-06-06 | 2013-12-25 | 中国科学院声学研究所 | Adaptive power control method and adaptive power control system applicable to underwater acoustic communication network |
| US10111184B2 (en) | 2014-03-18 | 2018-10-23 | Asustek Computer Inc. | Method for reducing number of times of switching communication channels and mobile device using the same |
| WO2023016445A1 (en) * | 2021-08-12 | 2023-02-16 | 华为技术有限公司 | Method and apparatus for suppressing sta, and electronic device |
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| JP2001313656A (en) * | 2000-04-28 | 2001-11-09 | Sony Corp | Base station device, terminal device, and system and method for radio communication |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103475426A (en) * | 2012-06-06 | 2013-12-25 | 中国科学院声学研究所 | Adaptive power control method and adaptive power control system applicable to underwater acoustic communication network |
| CN103475426B (en) * | 2012-06-06 | 2015-12-02 | 中国科学院声学研究所 | A kind of adaptive power control method and system being applicable to underwater sound communication network |
| US10111184B2 (en) | 2014-03-18 | 2018-10-23 | Asustek Computer Inc. | Method for reducing number of times of switching communication channels and mobile device using the same |
| WO2023016445A1 (en) * | 2021-08-12 | 2023-02-16 | 华为技术有限公司 | Method and apparatus for suppressing sta, and electronic device |
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| CN101959297B (en) | 2015-01-21 |
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