WO2006012772A1 - Procede de transmission sur reseau local etendu - Google Patents
Procede de transmission sur reseau local etendu Download PDFInfo
- Publication number
- WO2006012772A1 WO2006012772A1 PCT/CN2004/000891 CN2004000891W WO2006012772A1 WO 2006012772 A1 WO2006012772 A1 WO 2006012772A1 CN 2004000891 W CN2004000891 W CN 2004000891W WO 2006012772 A1 WO2006012772 A1 WO 2006012772A1
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- WO
- WIPO (PCT)
- Prior art keywords
- frame
- rate
- transmission
- transmitting
- channel quality
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/18—Negotiating wireless communication parameters
- H04W28/22—Negotiating communication rate
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0025—Transmission of mode-switching indication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0026—Transmission of channel quality indication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
Definitions
- This invention relates generally to wireless communication technologies and, more particularly, to a wireless local area network multi-rate transmission method. Background technique
- the WLAN is usually based on the Carrier Sense Multiple Access Protocol (CSMA).
- CSMA Carrier Sense Multiple Access Protocol
- the improvements are as follows: split-channel reservation multiple access (SRMA), multiple access with collision (MAC) (multiple access with collision) Avoidance), improved collision avoidance multiple access protocol (MACAW), bottom acquisition multiple access (FAMA), and 802.11.
- SRMA split-channel reservation multiple access
- MAC multiple access with collision
- MACAW multiple access with collision
- FAMA bottom acquisition multiple access
- 802.11 The wireless local area network referred to in the present invention is generally in the CSMA protocol.
- Multi-rate transmission in a WLAN requires two major issues to be addressed: channel shield estimation and rate selection.
- the channel quality estimation mainly uses the statistics of signal-to-noise ratio, signal strength, bit error rate, symbol error rate or frame error rate as the decision measure to measure the transmission quality of the channel. At present, there are many implementation methods and mature.
- the automatic rate stimuli protocol was proposed by Eddie Camoman et al. The core idea is to adjust the transmission rate based on the number of successes and failures of previous transmissions. This is actually a rate adjustment system based on the frame rate. After a certain number of successful transmissions between stations, the channel quality is considered to be reliable and the transmission rate is increased step by step. Conversely, if the transmission between stations fails, the channel shield is considered to be degraded. Level reduces the transmission rate.
- the transmission rate of each frame in the same transmission process is constant, so multi-rate transmission does not cause a change in duration, and is suitable when the channel change between stations is slow.
- it does not apply to the wireless mobile channel environment, because in the wireless mobile channel, the channel quality changes faster, and the channel is coherent.
- the time is short, and the data transmission interval of several successes or failures is used as the channel shield time window time is too long, so that the channel quality statistics are unreliable and the transmission throughput rate is decreased.
- the receiver-based automatic rate protocol was proposed by Gavin Holland, Natin Weidya and Pavlo Barr, which overcomes the shortcomings of automatic rate-strain protocols that cannot accommodate wireless mobile channels. Its core idea is
- the transmission rate and frame length of the frame are inserted in the duration subfield of the MAC frame header.
- the transmitting station transmits a "transmission request frame" at a rate of a basic rate concentration, and the receiving station estimates channel quality information according to the received signal, and then adaptively adjusts the transmission rate, and the transmitting station receives the acknowledgement frame returned by the station.
- the transmission rate transmits the next frame, and the node that does not participate in the communication corrects the network allocation vector in real time according to the data transmission rate and frame length of the received signal. Since the time interval of the channel quality is measured by one frame transmission interval in one transmission process, the protocol rate change is real-time and suitable for the wireless mobile channel.
- the main disadvantage of this protocol is that the sending station always sends the data frame at the sending rate of the acknowledgment frame returned by the receiving node.
- the sending station or the receiving station cannot predetermine the transmission rate when sending the next frame, so it cannot be accurately set.
- the duration field content has to be changed to the transmission rate and the transmission frame length so that the node that does not participate in the communication corrects the network allocation vector.
- the wireless channel also has small-scale fading. When the node moves at high speed, the channel state information of the physical channel changes rapidly. For reliable communication, there is a certain limit on the transmission frame length, and a longer MAC frame. It is often divided into multiple small segments.
- the network allocation vector correction method based on the receiver's automatic rate protocol is not only inferior to the existing protocol, but also because its duration field does not have the reservation effect on the next frame transmission channel and is not suitable for multi-segment transmission.
- the frame length of the acknowledgement frame returned by the receiving node is usually much smaller than the length of the data frame sent by the transmitting station.
- the frame error rate increases as the frame length increases, so that the receiving frame can reliably return the acknowledgement frame.
- Sending data frames at the transmission rate is not statistically reliable. Therefore, the protocol is not applicable to wireless high-speed mobile channels and has poor compatibility.
- the present invention provides a method for transmitting data in a wireless local area network, including: transmitting a transmission frame from a transmitting direction to a receiving side at a current rate; and returning and transmitting a transmission rate from a receiving direction to a transmitting side Or channel shield related information; adjust the current rate according to the above information related to the transmission rate or the amount of information; and send the next transmission frame from the transmitting direction to the receiver at the adjusted current rate.
- the step of returning information related to the transmission rate or the channel quality includes: returning, by the returning frame corresponding to the foregoing transmission frame, information related to the transmission rate or the channel quality from the receiving direction.
- the one transmission frame sent by the receiving direction from the transmitting direction is an RTS frame; wherein, the step of returning information related to the transmission rate or the channel quality from the receiving direction to the transmitting side comprises: using the CTS frame corresponding to the RTS frame to return and Information about the transmission rate or channel shield.
- the one transmission frame sent by the receiving direction from the transmitting direction is a data frame; wherein, the step of returning information related to the transmission rate or the channel quality from the receiving direction to the transmitting side comprises: using an Ack frame corresponding to the data frame to return and Information about transmission rate or channel quality.
- the method for transmitting data in the WLAN further includes: repeating the step of returning the information related to the transmission rate or the channel quality, the step of adjusting the current rate, and the step of transmitting the next sending frame until the end of the data transmission .
- the return frame is also transmitted at the current rate.
- the transmission rate is divided into a plurality of levels VI ⁇ VP, where VI is the base rate and VP is the highest rate.
- the current rate is set to the base rate when a transmission is initiated.
- the current rate according to the statistical information of the channel quality is set to a rate higher than the basic rate.
- the foregoing information about the transmission rate or the channel quality includes: information indicating one of the V1 to VP multi-level transmission rates; the step of adjusting the current rate includes: indicating according to the foregoing information related to the transmission rate or the channel quality.
- the rate level adjusts the current rate.
- the foregoing information about the transmission rate or the channel quality includes: indicating a signal to noise ratio, Information of one or more of signal strength, bit error rate, symbol error rate, and frame error rate.
- each of the transmitting frames sent from the transmitting direction includes: a step of setting a duration for the transmitting frame.
- the step of setting a duration for the sending frame comprises: calculating the sending according to a time taken to transmit a return frame corresponding to the sending frame, a next sending frame, and a return frame corresponding to the next sending frame at a current rate. The duration of the frame; and setting the calculated duration of the transmitted frame in the duration field of the transmitted frame.
- returning each return frame from the receiving direction to the sender includes: a step of setting a duration for the return frame.
- the step of setting a duration for the return frame comprises: calculating a frame length of the next transmission frame according to the received duration of the transmission frame corresponding to the return frame, a current rate, and a frame length of the return frame; The duration of the return frame, the duration of the return frame corresponding to the time taken to transmit the next received frame and the corresponding return frame according to the adjusted transmission rate; and setting the calculated duration of the returned frame at The return frame is in the duration field.
- the method for transmitting data in the wireless local area network further comprises: other nodes not participating in the communication maintaining the network allocation vector according to the duration in the sending frame and the returning frame.
- the step of returning information related to the transmission rate or the channel quality includes: receiving the foregoing transmission frame; determining channel quality according to the reception result; selecting an optimal transmission rate according to the channel quality; and using the return corresponding to the foregoing transmission frame
- the frame returns information indicating the optimal transmission rate from the receiving side to the sender.
- the step of returning information related to a transmission rate or a channel shield includes: receiving the transmission frame; determining a channel quality according to the reception result; and returning from the receiving direction to the sender by using a return frame corresponding to the transmission frame Information indicating the quality of the channel.
- the step of adjusting the current rate includes: selecting an optimal transmission rate as the current rate according to the information of the channel shield in the returned frame.
- FIG. 1 is a flow chart showing a method of transmitting data in a wireless local area network according to an embodiment of the present invention
- FIG. 2 is a detailed flow chart showing a method of transmitting data in a wireless local area network according to an embodiment of the present invention
- 3A and 3B are diagrams for explaining a format of a physical frame of a return frame according to an embodiment of the present invention
- FIG. 4 is a diagram for explaining a calculation duration and a maintenance network allocation vector (NAV) situation according to an embodiment of the present invention. detailed description
- a flow diagram of a method of transmitting data in a wireless local area network in accordance with one embodiment of the present invention is shown.
- a transmission frame is transmitted from the transmitting direction to the receiving side at the current rate.
- a frame transmitted from a transmitting side to a receiving side is referred to as a "sending frame”
- a frame returned from a receiving side to a transmitting side is referred to as a "returning frame”.
- transmitting a frame in a wireless local area network may include: an RTS (Request To Send) frame, a data frame, etc.; respectively, corresponding to the transmitted frame, the return frame may include: CTS (Clear To Send) frame, ACK (acknowledgement) frame, etc.
- the sender returns information related to the transmission rate or channel quality from the receiving side.
- the receiving party may receive the transmission frame sent by the sender, evaluate the channel quality according to the result of the reception, and then determine an optimal transmission rate and return the information of the optimal transmission rate to the sender.
- the receiver may simply return the channel quality information to the sender, and then the sender determines the optimal transmission rate based on the channel shield.
- the present invention is not particularly limited as to how to evaluate the channel quality and how to determine the optimum transmission rate according to the channel quality, and any method known to those skilled in the art can be employed. Rear Some methods are exemplarily enumerated in the preferred embodiment of the invention described above, but the invention is not limited to the method.
- the current rate is adjusted based on the returned information related to the transmission rate or channel quality. Specifically, corresponding to the step of returning information before, if the channel quality information is returned from the receiver, the sender further determines an optimal transmission rate according to the quality information to adjust the current rate; if the return from the receiver is The information indicating the optimal transmission rate is updated by the sender directly according to the information.
- step 115 the next transmission frame is transmitted from the transmitting direction to the receiver at the adjusted current rate.
- the method of transmitting data in the wireless local area network of the present embodiment can transmit data at different rates according to the channel state, thereby adapting to changes in channel quality due to movement or other reasons.
- FIG. 2 is a detailed flow chart showing a method of transmitting data in a wireless local area network in accordance with a preferred embodiment of the present invention. Preferred embodiments of the present invention will now be described with reference to the drawings.
- the initial current rate is set.
- the transmission rate is divided into, the transmission rate is divided into a plurality of levels VI ⁇ VP, where VI is the basic rate (lowest rate) and VP is the highest rate.
- the initial current rate can be set to the base rate VI.
- a rate higher than the basic rate may be selected as the initial current rate according to the statistical information.
- the precondition is to fully guarantee that the first transmitted frame can be correctly transmitted at the initial current rate.
- step 210 the RTS frame is transmitted from the transmitting direction to the receiver at the initial current rate.
- a data transfer is typically initiated in the WLAN, first by the sender sending an RTS frame as a request.
- the receiver After receiving the RTS request, the receiver returns a CTS frame at the initial current rate. Specifically, the receiver receives the RTS frame sent by the sender, evaluates the channel quality according to the received result, and then determines an optimal transmission rate (for example, V5), and includes a representation in the CTS return frame returned to the sender.
- the information of the optimal transmission rate here, the characteristics of the transmitted data (eg, frame length, code rate, etc.) and channel shield characteristics (eg, signal-to-noise ratio, signal strength, bit error rate, symbol error rate, etc.) should be considered. ) to determine an optimal transmission rate.
- the sender determines that the rate should be strictly enforced by the sender, otherwise the receiver's reservation time for the channel is not accurate, and it is difficult to avoid collision.
- the joint diagrams 3A and 3B illustrate a specific manner in which the optimum transmission rate information is returned to the sender in accordance with a preferred embodiment of the present invention.
- the optimal transmission rate information is included in the physical frame header of the return frame and returned to the sender.
- 3A and 3B are diagrams for explaining the format of a physical frame of a return frame according to an embodiment of the present invention.
- the structure of the current 802.11a physical layer frame is as shown in FIG. 3A, wherein the "RATE” field indicates the transmission rate of the physical layer frame "DATA" (data portion), and the “SERVICE” field is 16 bits, wherein 7 bits indicate scrambling generation. Polynomial, the remaining 9 bits are reserved. According to the preferred embodiment, 4 bits out of the reserved 9 bits are named "rRATE" field to indicate the above optimum transmission rate information (see Fig. 3B).
- the sender adjusts the current rate (e.g., V5) based on the optimal transmission rate information in the CTS frame.
- step 225 a data frame is transmitted from the transmitting direction to the receiver at the adjusted current rate.
- the sender returns an Ack frame from the receiving direction at the adjusted current rate.
- the receiver receives the data frame sent by the sender, evaluates the channel quality based on the received result, and then determines an optimal transmission rate, and includes the representation in the Ack return frame returned to the sender.
- the information of the optimal transmission rate eg, frame length, code rate, etc.
- channel quality characteristics eg, signal-to-noise ratio, signal strength, bit error rate, missymbol
- step 235 it is determined whether there are still data frames to be transmitted. If the determination is "Yes”, proceed to step 240, according to the optimal transmission rate information in the Ack frame, the sender adjusts the current rate (same as the aforementioned step 220); then, returns to step 225 to repeat the steps. 225 - 240, until no data frames need to be sent.
- step 235 If the decision at step 235 is "NO”, then the process ends at step 245.
- NAV network allocation vector
- the reserved time length information (RTS is 20 bytes) is stored in the RTS and CTS frames.
- CTS is 14 bytes).
- Other nodes that are not involved in data transmission receive the RTS/CTS frame, update the NAV (network allocation vector) value after obtaining the reserved duration information, and reserve the channel bandwidth for the data exchange between the sender and the receiver of the contention channel. , As shown in Figure 4.
- the duration of the transmission frame is set when each of the transmission frames is transmitted from the transmitting direction (e.g., steps 105, 115 of Figure 1 and steps 210, 225 of Figure 2). Specifically, the duration of the transmission frame is first calculated based on the time taken to transmit the return frame corresponding to the transmission frame, the next transmission frame, and the return frame corresponding to the next transmission frame at the current rate. Then, the calculated duration of the transmission frame is set in the duration field (field) of the transmission frame.
- the duration of the RTS frame in step 210 of FIG. 2 it should calculate that the CTS return frame corresponding to the RTS and the next data transmission frame are transmitted at the initial current rate (the data frame to be transmitted in step 225).
- the time taken to return the frame corresponding to the next transmitted frame should also include the interval between these frames (SIFS).
- the duration of the data transmission frame in step 225 of FIG. 2 it should calculate that the Ack return frame corresponding to the data transmission frame and the next data transmission frame are transmitted at the adjusted current rate (if any) Then, the next cycle performs the data frame processed in step 225) and The time taken by the Ack corresponding to the next transmitted frame to return the frame, of course, should also include the interval between these frames (SIFS).
- SIFS interval between these frames
- the duration is set for the return frame when returning from the receiving direction to each of the return frames (e.g., in steps 215, 230 of Fig. 2). Specifically, first, the frame length of the next transmission frame is calculated according to the received duration of the transmission frame corresponding to the return frame, the current rate, and the frame length of the returned frame. Then, the duration of the return frame is calculated, the duration of the return frame corresponding to the time taken to transmit the next received frame and the corresponding return frame according to the transmission rate indicated by the information related to the transmission rate or channel quality. Finally, the calculated duration of the return frame is set in the duration field of the return frame.
- L2 0. .
- step 230 calculating the duration of the CTS frame, the duration of the CTS frame corresponding to transmitting the next received frame (the data frame to be transmitted in step 225) and the corresponding return frame according to the adjusted current rate (step 230 is to return
- the time taken by the Ack frame should of course also include the interval between these frames (SIFS).
- other nodes in the network that are not participating in the communication listen to each of the transmission frame and the return frame in the channel, and update the NAV value according to the duration recorded therein. In this way, even in the case of a change in the transmission rate, an accurate update of the NAV value of each node in the WLAN can be ensured, and further resources can be saved while avoiding collisions.
- the transmission rate in the data transmission process, can be adaptively changed according to the channel state according to the physical frame segment, so that it can be applied to the high-speed mobile wireless fading channel.
- the embodiment of the present invention adopts the exchange technology of rate information (or channel quality information), and the exchange of rate information and the exchange of channel quality information are equivalent, and the sender can efficiently connect The data is sent at a rate that the receiver can receive reliably.
- the preferred embodiment of the present invention employs a rate setting method when the rate is variable, the method making the duration in the current segment have a reservation function for transmitting the next segment channel, and thus is suitable for segmentation transmission of data frames. .
- the transmission rate in the data frame transmitted by the sender and the transmission rate of the corresponding return frame are always equal, the transmission of the channel by the sender can be ensured, and the pair can be released in time at the end of the communication. The occupation of the channel.
- the above-described optimum rate information may not be recorded in the physical frame header, but may be recorded in a MAC frame, for example, a "Frame Control" field.
- the information contained in the return frame is not the optimum rate information but one or more of the signal to noise ratio, the signal strength, the bit error rate, the symbol error rate and the frame error rate.
- a combination of one or more of signal to noise ratio, signal strength, bit error rate, symbol error rate, and frame error rate may be hierarchically defined and then returned to the sender via a return frame. In this way, the sender can select the optimum transmission rate based on the characteristics of the channel quality and the characteristics of the data to be transmitted.
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- Engineering & Computer Science (AREA)
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Small-Scale Networks (AREA)
- Mobile Radio Communication Systems (AREA)
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2004/000891 WO2006012772A1 (fr) | 2004-08-06 | 2004-08-06 | Procede de transmission sur reseau local etendu |
| CNB2004800434611A CN100525191C (zh) | 2004-08-06 | 2004-08-06 | 无线局域网传输方法 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2004/000891 WO2006012772A1 (fr) | 2004-08-06 | 2004-08-06 | Procede de transmission sur reseau local etendu |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2006012772A1 true WO2006012772A1 (fr) | 2006-02-09 |
Family
ID=35786859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2004/000891 Ceased WO2006012772A1 (fr) | 2004-08-06 | 2004-08-06 | Procede de transmission sur reseau local etendu |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN100525191C (zh) |
| WO (1) | WO2006012772A1 (zh) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108882312A (zh) * | 2018-08-22 | 2018-11-23 | 深圳芯之联科技有限公司 | Rts帧发送速率的调整方法、装置、设备和存储介质 |
| CN113473297A (zh) * | 2021-07-01 | 2021-10-01 | 深圳市好上好信息科技股份有限公司 | 一种用于蓝牙设备的单线自动频率通讯方法 |
| CN114448556A (zh) * | 2020-11-05 | 2022-05-06 | 瑞昱半导体股份有限公司 | 无线通信系统与传输速率控制方法 |
| WO2025222924A1 (zh) * | 2024-04-24 | 2025-10-30 | 惠州市德赛西威智能交通技术研究院有限公司 | 一种信道状态信息采样方法、系统及设备 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3048149B1 (fr) * | 2016-02-23 | 2018-03-23 | Sagemcom Energy & Telecom Sas | Procede d'adaptation dynamique d'un debit de donnees |
| CN109698762B (zh) * | 2017-10-24 | 2020-10-23 | 华为技术有限公司 | 一种调整参数的方法及参数调整装置 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1327321A (zh) * | 2000-06-02 | 2001-12-19 | Lg电子株式会社 | 通信系统和在其中传送数据的方法 |
| EP1418714A1 (en) * | 2002-11-08 | 2004-05-12 | Alcatel | Transmitter and method for bandwidth allocation |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1512721A (zh) * | 2002-12-26 | 2004-07-14 | �ʼҷ����ֵ��ӹɷ�����˾ | 具有增强中央协调控制的无线局域网系统和方法 |
| WO2004064330A1 (en) * | 2003-01-09 | 2004-07-29 | Thomson Licensing S.A. | Method and apparatus for bandwidth provisioning in a wlan |
-
2004
- 2004-08-06 CN CNB2004800434611A patent/CN100525191C/zh not_active Expired - Fee Related
- 2004-08-06 WO PCT/CN2004/000891 patent/WO2006012772A1/zh not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1327321A (zh) * | 2000-06-02 | 2001-12-19 | Lg电子株式会社 | 通信系统和在其中传送数据的方法 |
| EP1418714A1 (en) * | 2002-11-08 | 2004-05-12 | Alcatel | Transmitter and method for bandwidth allocation |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108882312A (zh) * | 2018-08-22 | 2018-11-23 | 深圳芯之联科技有限公司 | Rts帧发送速率的调整方法、装置、设备和存储介质 |
| CN108882312B (zh) * | 2018-08-22 | 2023-02-17 | 深圳全志在线有限公司 | Rts帧发送速率的调整方法、装置、设备和存储介质 |
| CN114448556A (zh) * | 2020-11-05 | 2022-05-06 | 瑞昱半导体股份有限公司 | 无线通信系统与传输速率控制方法 |
| CN114448556B (zh) * | 2020-11-05 | 2024-04-12 | 瑞昱半导体股份有限公司 | 无线通信系统与传输速率控制方法 |
| CN113473297A (zh) * | 2021-07-01 | 2021-10-01 | 深圳市好上好信息科技股份有限公司 | 一种用于蓝牙设备的单线自动频率通讯方法 |
| WO2025222924A1 (zh) * | 2024-04-24 | 2025-10-30 | 惠州市德赛西威智能交通技术研究院有限公司 | 一种信道状态信息采样方法、系统及设备 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100525191C (zh) | 2009-08-05 |
| CN1977492A (zh) | 2007-06-06 |
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