CN1976270A - Realizing method for wireless local network group broadcasting frame transmitting rate dynamic automatic regulating - Google Patents
Realizing method for wireless local network group broadcasting frame transmitting rate dynamic automatic regulating Download PDFInfo
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Abstract
A dynamically self-adjusting method of multicast frame transmission rate on radio local area network includes selecting initial sending rate to send IP multicast message to radio client end by radio access device, counting up total amount of data sent by said device in certain period to obtain error rate of message-sending, regulating a sending rate of next message according to obtained error rate and recording this sending rate as optimum single-cast message sending rate, selecting and fetching a lowest sending rate as optimum broadcast message sending rate when message to be sent is broadcast message or non-IP multicast message.
Description
Technical field
The implementation method of multicasting technology service application when the present invention relates to wireless local area network building in the field of wireless communication relates in particular to the method for IEEE 802.11 wireless lan (wlan) transmission group broadcasting frames.
Background technology
WLAN (wireless local area network) is as a kind of access technology of the network terminal, possesses the access speed height, advantages such as it is simple and easy to connect up, more and more be widely used in home network, along with the continuous development of broadband and video compression technology, promptly increasing in the demand of Network Transmission based on the multimedia of video and voice.Current popular multimedia application, real-time, interactive, IPTV application such as (Internet Protocol TV) as video and voice, all require than higher network bandwidth support, use an important directions that becomes Future Development gradually by the wireless local area network technology transmitting multimedia.
Traditional IEEE 802.11 WLAN (wireless local area network) are the data Application Design, support to multicast application is more weak, after a multicast message arrival of multicast source transmission WAP (wireless access point), wireless access this multicast message of naming a person for a particular job sends to related wireless client, but other wireless clients that do not belong to this multicast group and be associated with this WAP (wireless access point) also can be received this multicast message.
When IEEE 802.11 WLAN (wireless local area network) transmission destination addresses are clean culture (Unicast) data message of wireless client MAC (medium access control) address, after the unicast message that WAP (wireless access point) sends arrives wireless client, the wireless client that receives data sends 802.11 and confirms that (ACK) frame is to WAP (wireless access point), if access point apparatus does not receive the ACK frame of wireless client, the PHY layer can retransmit this frame, if number of retransmissions surpasses pre-set threshold, then abandon these data.In 802.11 higher wireless networks of interference ratio, 802.11ACK provides reliable data transmission mechanism.Access point apparatus can also be by receiving 802.11ACK frame and other management or the Frame of wireless client, detect the signal quality of wireless client, and adjust the data transmission rate of wireless client in real time according to signal quality, further can guarantee the reliable transmission of data.
During IEEE 802.11 wireless local network transmission group broadcastings (Multicast) data message, 802.11 agreement regulation, the wireless client of being responsible for receiving group can not send the 802.11ACK frame to WAP (wireless access point), cause WAP (wireless access point) to can not determine whether wireless client has correctly received multicast frame, because do not have affirmation retransmission mechanism and other the reliable mechanism that guarantees of 802.11ACK, the transmission reliability of multicast packet is lower.
Do not send the 802.11ACK frame to WAP (wireless access point) owing to be responsible for the wireless client of receiving group simultaneously, WAP (wireless access point) also just can not detect recipient's signal quality by the multicast message that sends.When the multicast message that transmits between WAP (wireless access point) and the wireless client occupies main flow, because WAP (wireless access point) can not detect recipient's signal quality and the data transmission rate of adjusting wireless client according to signal quality in real time, can cause the error rate that multicast message sends in certain period to increase, but the property of muticast data transmission is by further reducing.
When the signal quality between WAP (wireless access point) and wireless client changes, can not in time adjust the multicast message transmission rate between WAP (wireless access point) and the wireless client, causing multicast message to send the error rate increases, simultaneously because the multicast frame between WAP (wireless access point) and the wireless client does not have acknowledgment of receipt mechanism, the transmission reliability of multicast frame is lower, it is not smooth broadcast often to occur, and traffic affecting is carried out.
It is to be sent to all wireless clients that WAP (wireless access point) sends multicast message, WAP (wireless access point) can both receive multicast frame in order to guarantee all wireless clients, usually WAP (wireless access point) sends multicast frame with the most conservative data rate, be generally 1Mbps as 802.11b, 802.11a/g be generally 2Mbps, but the above-mentioned multicast frame data transmission rate of actual bandwidth ratio is also low, this is for needing 2Mbps even the more multimedia application such as the IPTV business of high bandwidth at least, bandwidth is obviously not enough, and traffic affecting is normally carried out.If fixed configurations than higher multicast packet transmission rate, can cause some lower wireless client of signal quality correctly not receive, particularly change when the change wireless client that causes and the signal quality between WAP (wireless access point) of environment such as the distance between wireless client and the WAP (wireless access point), barrier, if the multicast transmission rate between WAP (wireless access point) and wireless client can not be adjusted in real time, higher multicast then can occur and send the error rate, cause correctly receiving group message of wireless client.Therefore the transmission rate that needs to increase multicast is to improve bandwidth, and the multicast transmission rate must be supported and can adjust in real time.
Summary of the invention
Technical problem to be solved by this invention provides the dynamic self-adjusting implementation method of a kind of wireless local network group broadcasting frame transmitting rate, and dynamically self-adjusting multicast transmission rate improves multicast transmission speed.
In order to solve the problems of the technologies described above, the invention provides the dynamic self-adjusting implementation method of a kind of wireless local network group broadcasting frame transmitting rate, comprising:
When the message that sends is the IP multicast message:
(a) radio reception device selects initialization speed to send the IP multicast message to wireless client;
(b) radio reception device obtains the error rate that message sends by data total amount that sends in statistics a period of time and the data bulk that sends failure, adjust message transmitting spped rate next time according to error rate, and this message transmitting spped rate is recorded as the best unicast message transmission rate of described wireless client;
When the message that sends is broadcasting packet or non-IP multicast message:
Radio reception device reads the best unicast message transmission rate of each multicast member, therefrom selects a minimum transmission rate as best broadcasting packet transmission rate, sends broadcasting packet or non-IP multicast message to wireless client.
Further, said method also can comprise following characteristics: in the described step (a), described radio reception device sends to member's wireless client in the multicast group with this IP multicast message with the unicast message form, the described transmission with the unicast message form is meant that radio reception device replaces to the multicast destination address of this IP multicast message the MAC Address of this multicast member wireless client.
Further, said method also can comprise following characteristics: when wireless client has when a plurality of, radio reception device replaces with the multicast destination address of this IP multicast message the MAC Address of each wireless client in the multicast group successively, every replacement primary address sends once, all sends up to all member's wireless clients in multicast group to finish.
Further, said method also can comprise following characteristics: in described step (b), obtaining message transmission error rate specifically refers to: the data total amount that described radio reception device time recording is sent under this message transmitting spped rate, and, calculate the error rate that message sends in this timing according to the quantity that the affirmation message statistics transmission that wireless client returns is failed.
Further, said method also can comprise following characteristics: in described step (b), describedly adjust message transmitting spped rate according to error rate and be meant, after radio reception device improves message transmitting spped rate, when finding that described error rate improves, reduce described message transmitting spped rate, when finding that described error rate reduces, improve described message transmitting spped rate.
Further, said method also can comprise following characteristics: in described step (b), describedly adjust message transmitting spped rate according to error rate and be meant, after radio reception device reduces message transmitting spped rate, when finding that described error rate improves, improve described message transmitting spped rate, when finding that described error rate reduces, reduce described message transmitting spped rate.
Further, said method also can comprise following characteristics: in described step (b), if described error rate is identical, then the highest message transmitting spped rate of record is best unicast message transmission rate.
Further, said method also can comprise following characteristics: the adjustment of described message transmitting spped rate is carried out repeatedly.
Further, said method also can comprise following characteristics: described best unicast message transmission rate each when sending message all according to before error rate change and adjust, described best broadcasting packet transmission rate is all adjusted according to the best unicast message transmission rate of multicast member wireless client when sending message each.
Adopt the method for the invention, make in the WLAN (wireless local area network) product of setting up with IEEE 802.11a/b/g standard and wireless standard IEEE 802.11n of future generation, by management to multiast radio client member, realized the self-adjusting of wireless multicast rate dynamic, reached the effect of high speed reliable transmission multicast message simultaneously, overcome the defective of the low poor reliability of IEEE 802.11 transport multicast message bandwidth, guaranteed based on the reliable application of the net cast business of multicasting technology at the WLAN (wireless local area network) product, greatly expand the range of application of WLAN (wireless local area network) product, promoted the development of wireless local network group broadcasting service application.
Description of drawings
Fig. 1 is a multicast transmission system application drawing of the present invention;
Fig. 2 is a multicast transmission equipment drawing of the present invention;
Fig. 3 is the scheme module map of multicast transmission of the present invention;
Fig. 4 is the application exemplary plot of multicast transmission of the present invention;
Fig. 5 is the wireless message transmissions rate dynamic of a present embodiment self-adjusting flow chart.
Embodiment
Multicast transmission system is used as shown in Figure 1, comprises wireless client, WAP (wireless access point), compartment system (DS) and multicast source in the application system of multicast transmission at least.Wireless client need ask to add or when leaving certain multicast group of multicast source, IGMP (IGMP) message that wireless client sends sends to multicast source through WAP (wireless access point), and the wireless access wireless client of naming a person for a particular job joins this multicast group.When multicast source sent certain IP multicast message to the member of multicast group, the IP multicast message that multicast source sends sent to member's wireless client of multicast group through WAP (wireless access point), finishes the transmission of IP multicast.
Wherein: multicast source is used to send multicast message; Compartment system is used to connect WAP (wireless access point) and multicast source; One or more WAP (wireless access point) are used for determining and select transmission rate, and multicast message is sent to wireless client, are used for the IP multicast message is treated to unicast message, and handle adding that wireless client sends or the solicited message of leaving multicast group; One or more wireless clients are to use the user of multicast service, can send the request that adds or leave multicast group to WAP (wireless access point).
As shown in Figure 2, the wireless access point device of transport multicast is made up of radio interface module, multicast member management module, upstream Interface module, 802.1d bridge module, IP routing module, protocol application module and Configuration Manager.The message that the radio interface module of equipment receives is forwarded to the upstream Interface module through 802.1d bridge module or IP routing module, and the message that the upstream Interface module receives is forwarded to radio interface module through 802.1d bridge module or IP routing module.Then send by the multicast member management resume module when radio interface module or upstream Interface module receive IGMP (Internet igmpinternet) message or IP multicast message: the multicast member management resume module is safeguarded the multicast member tabulation from the IGMP message that radio interface module receives; The IP multicast message that the upstream Interface module receives further is forwarded to the multicast member management resume module through 802.1d bridge module or IP routing module, by the multicast member management module IP multicast message is forwarded to radio interface module.Wherein:
Radio interface module, comprise wireless driver module and hardware interface, wherein wireless driver module is used to receive and send management of 802.11 between WAP (wireless access point) and wireless client and Frame, and, adjust in real time and " best unicast message transmission rate " that definite WAP (wireless access point) sends to wireless client reaches " best broadcasting packet transmission rate " according to detecting the signal quality that is connected of WAP (wireless access point) and wireless client in real time with mutual 802.11 frames of wireless client;
The multicast member management module is used to safeguard multicast member tabulation and the mac address information that writes down the multicast member wireless client, also is responsible for the IP multicast message between reception and forwarding multicasting source and multicast member wireless client;
802.1d bridge module and IP routing module are used for the message routing and E-Packet;
The upstream Interface module, comprise driving and the upstream hardware interface, be used to connect external network, as the interface of Internet, can receive Internet in succession by connecting equipment rooms such as DSLAM, switch, BRAS, described upstream Interface can be interfaces such as Ethernet interface, xDSL interface, xPON;
The protocol application module and the Configuration Manager of equipment are used to finish variety of protocol and upper layer application, and the configuration management of Local or Remote.
As shown in Figure 3, in the WAP (wireless access point) that realizes the described high speed reliable transmission of this programme multicast message, comprise wireless driver module, multicast member management module.In wireless driver module, all preserve a best unicast message transmission rate at each wireless client, when each wireless client newly is linked into WAP (wireless access point), wireless driver module is determined this wireless client " best unicast message transmission rate ", perhaps when " the best unicast message transmission rate " of wireless client when changing in real time, wireless driver module is selected minimum " best unicast message transmission rate " value in all clients, send " the best broadcasting packet transmission rate " of other broadcast group broadcast messages (being non-IP multicast message) as WAP (wireless access point) to each wireless client, described " best broadcasting packet transmission rate " also can be described as " best multicast message transmission rate ", is the shared speed of all clients.
The multicast member tabulation, member's wireless client client information of record multicast group and multicast group, each multicast group has a multicast member tabulation, by multicast member management module Dynamic Maintenance, can be stored in the multicast member management module, wherein wireless client information comprises the mac address information of wireless client.
In specifically practicing, as shown in Figure 4.In the WLAN (wireless local area network) product of setting up with IEEE 802.11a/b/g standard and wireless standard IEEE 802.11n of future generation, wireless access point device inserts a plurality of wireless clients, wireless client sends the IP multicast group that the request of joining message of IGMP multicast adds certain multicast source to WAP (wireless access point), and perhaps wireless client sends the IP multicast group that certain multicast source is left in the request of IGMP multicast leave message to WAP (wireless access point).The multicast member management module of WAP (wireless access point) adds or leave message according to the IGMP multicast that receives wireless client from wireless driver module, the information such as MAC (medium access control) address of tabulation of Dynamic Maintenance multicast member and wireless client.
In existing IEEE 802.11a/b/g wireless lan network and wireless standard IEEE802.11n wireless lan network of future generation, the transmission method of IP multicast message may further comprise the steps:
Step 110, the IP multicast message that sends from multicast source arrives WAP (wireless access point);
Step 120, the multicast member management module searches multicast member tabulation in the WAP (wireless access point) judges whether the multicast group of this IP multicast message correspondence has the multicast member wireless client in the multicast member tabulation, if have, then carry out next step, otherwise, this IP multicast message abandoned;
Step 130, multicast member management module replace to the multicast destination address of IP multicast message the MAC Address of member's wireless client in this multicast group;
If wireless client has a plurality of, then the target MAC (Media Access Control) address of IP multicast message is replaced with successively the MAC Address of each wireless client in the multicast group, every replacement primary address sends once, all sends up to all member's wireless clients in multicast group to finish.
Step 140, the multicast member management module is forwarded to wireless driver module with this IP multicast message with the form of unicast message;
Unicast message described herein or multicast message all are notional at two layers, and the MAC of two layers of unicast message feeling the pulse with the finger-tip is the MAC Address of wireless client, and the purpose MAC of Layer 2 Multicast message is the address that is similar to 01:00:5E:XX:XX:XX.
Between the IP address of IP multicast message and its multicast MAC corresponding relation is arranged, after the MAC Address on two layers replaced to the MAC Address of each client, two layers equipment just thought that this is a unicast packet, and the transmission of this moment is exactly that unicast message sends.
Step 150, the wireless driver module member's wireless client in multicast group sends the IP multicast message;
If the message destination address that wireless driver module sends is the MAC Address of wireless client, then " the best unicast message transmission rate " according to pre-determined this each wireless client sends to wireless client, and radio reception device is determined best unicast message transmission rate according to 802.11 messages of the wireless client that receives in advance.
For the IP multicast message, because destination address has converted the MAC Address of wireless client to, as the monocular message, its transmission rate is exactly the best unicast message transmission rate of client.
Step 160, wireless client are returned acknowledge message after receiving message.
WAP (wireless access point) receives the reliable transmission of 802.11 acknowledgement frames (ACK) the assurance data of wireless client.
Enter broadcasting (Broadcast) the categorical data message of WAP (wireless access point) and multicast (Multicast) the categorical data message of non-IP multicast is non-IP multicast message for other, then do not need to give the multicast member management module, directly give wireless driver module and send.The broadcasting that wireless driver module sends and other multicast messages send with " best broadcasting packet transmission rate ".Process is as follows: radio reception device sends non-IP multicast message according to predetermined best broadcasting packet transmission rate to described wireless client after receiving the non-IP multicast message that multicast source or compartment system send.
For non-IP multicast message, radio reception device is selected best unicast message transmission rate minimum in all wireless clients, as the transmission rate of this non-IP multicast message.
Best unicast message transmission rate is that radio reception device is determined according to 802.11 frames of the wireless client that receives.
Send multicast frame with common WAP (wireless access point) with the most conservative data rate and (be generally 1Mbps as 802.11b, 802.11a/g be generally 2Mbps) compare, when " the best unicast message transmission rate " of each wireless client all is higher than the most conservative data rate, just " best broadcasting packet transmission rate " can improve the transmission rate of broadcasting and other multicast messages when being higher than the most conservative data rate.
In the WLAN (wireless local area network) product with IEEE 802.11a/b/g standard and wireless standard IEEE 802.11n of future generation, device of wireless local area network access point is by being converted to the IP multicast wireless client unicast mac address method of message, the IP multicast message that multicast source sends to WAP (wireless access point) can send to the multicast member wireless client of IP multicast correspondence respectively, message between different multicast group does not influence mutually, simultaneously because message is the wireless client of sending to unicast message, its speed and reliability reach the Performance And Reliability index of unicast message, have guaranteed based on the reliable application at the WLAN (wireless local area network) product of the net cast business of IP multicasting technology.
In existing IEEE 802.11a/b/g wireless lan network and wireless standard IEEE802.11n wireless lan network of future generation, the self-adjusting of realization multicast speed is specifically implemented, and as shown in Figure 5, may further comprise the steps:
Step 210, wireless driver module sends data by physical layer to wireless client;
During initial the transmission, wireless driver module selects an initialization speed to send data, and initialization speed is selected the flank speed under this pattern usually.
Step 220, the data total amount that wireless driver module time recording is sent under this message transmitting spped rate, and the affirmation message of returning according to wireless client statistics sends the quantity of failure, calculate the error rate that message sends in this timing, if judge that this error rate is lower than error rate last time, then carry out next step, if judge that this error rate is higher than error rate last time, then execution in step 240, if judge this error rate equal last time error rate or this time error rate and last time error rate difference in preset range, then execution in step 250;
Step 230, wireless driver module improves data transmission rate, returns step 210;
Step 240, wireless driver module reduces data transmission rate, returns step 210;
Step 250, judge whether this message transmitting spped rate is higher than message transmitting spped rate last time, if, then write down with the best unicast message transmission rate of this message transmitting spped rate for this member's wireless client, and with this speed transmission message, otherwise record message transmitting spped rate last time is the best unicast message transmission rate of this member's wireless client, and sends message with this speed.
When sending the non-IP multicast message of broadcasting and other, at first read the best unicast message transmission rate of each multicast member, therefrom select a minimum transmission rate as best broadcasting packet transmission rate, along with the variation of best unicast message transmission rate, best broadcasting packet transmission rate is also in continuous variation.
The foregoing description is considered be message transmitting spped rate with error rate between becomes the situation of positive relationship, i.e. message transmission rate to improve or during reduction, also corresponding raising of error rate or reduction.In other embodiments, also might inverse relationship between message transmitting spped rate and the mistake, after the wireless driver module raising/reduction transmission rate,, then continue to heighten/reduce message transmitting spped rate if calculate error rate and reduce/improved.
In another embodiment, above-mentioned two schemes also can be used in combination.As after calculating error rate, carry out following step:
(i) wireless driver module improves data transmission rate, and calculated data sends error rate, compares with the error rate of former transmission rate, if error rate has reduced, then write down current transmission rate,, then transmission rate is recalled to former transmission rate if instead error rate has improved;
(ii) wireless driver module reduces data transmission rate, calculated data sends error rate, compare with the error rate of former transmission rate, if error rate has reduced, then the emission rate of wireless module is adjusted to current lower speed, if instead error rate has improved, then transmission rate is recalled to former transmission rate.
Carry out through top three step repeating queries, according to data error rate under the different rates, the transmission rate of a period of time wireless driving later will be adjusted to optimum speed (being exactly the transmission rate that produces lowest error rate in process of transmitting) automatically.Will regulate message transmitting spped rate as long as there is message to send, each message all can be adjusted according to former statistics.
In a word, principle is to select the minimum speed of error rate to send, under error rate differs very little situation, select wherein the highest speed to send, for example under low rate, error rate may all be zero, then seeks wherein higher speed and sends, and reaches the effect of low error rate, high transmission rate at last.
This method has overcome the defective of the low poor reliability of IEEE 802.11 transmission IP multicast message bandwidth, greatly expanded the application of WLAN (wireless local area network) product, particularly based on the application of the net cast business of IP multicasting technology, for the WLAN (wireless local area network) product provides strong assurance popularizing with development of home network at the WLAN (wireless local area network) product.
Claims (9)
1, the dynamic self-adjusting implementation method of wireless local network group broadcasting frame transmitting rate comprises:
When the message that sends is the IP multicast message:
(a) radio reception device selects initialization speed to send the IP multicast message to wireless client;
(b) radio reception device obtains the error rate that message sends by data total amount that sends in statistics a period of time and the data bulk that sends failure, adjust message transmitting spped rate next time according to error rate, and this message transmitting spped rate is recorded as the best unicast message transmission rate of described wireless client;
When the message that sends is broadcasting packet or non-IP multicast message:
Radio reception device reads the best unicast message transmission rate of each multicast member, therefrom selects a minimum transmission rate as best broadcasting packet transmission rate, sends broadcasting packet or non-IP multicast message to wireless client.
2, the method for claim 1, it is characterized in that, in the described step (a), described radio reception device sends to member's wireless client in the multicast group with this IP multicast message with the unicast message form, the described transmission with the unicast message form is meant that radio reception device replaces to the multicast destination address of this IP multicast message the MAC Address of this multicast member wireless client.
3, method as claimed in claim 2, it is characterized in that, when wireless client has when a plurality of, radio reception device replaces with the multicast destination address of this IP multicast message the MAC Address of each wireless client in the multicast group successively, every replacement primary address sends once, all sends up to all member's wireless clients in multicast group to finish.
4, the method for claim 1, it is characterized in that, in described step (b), obtaining message transmission error rate specifically refers to: the data total amount that described radio reception device time recording is sent under this message transmitting spped rate, and, calculate the error rate that message sends in this timing according to the quantity that the affirmation message statistics transmission that wireless client returns is failed.
5, the method for claim 1, it is characterized in that, in described step (b), describedly adjust message transmitting spped rate according to error rate and be meant, after radio reception device improves message transmitting spped rate, when finding that described error rate improves, reduce described message transmitting spped rate, when finding that described error rate reduces, improve described message transmitting spped rate.
6, the method for claim 1, it is characterized in that, in described step (b), describedly adjust message transmitting spped rate according to error rate and be meant, after radio reception device reduces message transmitting spped rate, when finding that described error rate improves, improve described message transmitting spped rate, when finding that described error rate reduces, reduce described message transmitting spped rate.
7, the method for claim 1 is characterized in that, in described step (b), if described error rate is identical, then the highest message transmitting spped rate of record is best unicast message transmission rate.
8, the method for claim 1 is characterized in that, the adjustment of described message transmitting spped rate is carried out repeatedly.
9, method as claimed in claim 9, it is characterized in that, described best unicast message transmission rate each when sending message all according to before error rate change and adjust, described best broadcasting packet transmission rate is all adjusted according to the best unicast message transmission rate of multicast member wireless client when sending message each.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2006101497534A CN1976270A (en) | 2006-11-20 | 2006-11-20 | Realizing method for wireless local network group broadcasting frame transmitting rate dynamic automatic regulating |
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| CNA2006101497534A CN1976270A (en) | 2006-11-20 | 2006-11-20 | Realizing method for wireless local network group broadcasting frame transmitting rate dynamic automatic regulating |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104780014A (en) * | 2014-01-09 | 2015-07-15 | 瑞昱半导体股份有限公司 | Wireless communication device and method of deciding transmission rate group of wireless communication device |
| US9210565B2 (en) | 2010-04-07 | 2015-12-08 | Huawei Technologies Co., Ltd. | Multicast control method and apparatus |
| CN105323724A (en) * | 2015-06-03 | 2016-02-10 | 成都西加云杉科技有限公司 | Setting method and device for sending speed in multicast/broadcast technology |
| CN107590094A (en) * | 2017-09-28 | 2018-01-16 | 深圳市道通科技股份有限公司 | A kind of serial duplex signaling method, apparatus and computer-readable recording medium |
-
2006
- 2006-11-20 CN CNA2006101497534A patent/CN1976270A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9210565B2 (en) | 2010-04-07 | 2015-12-08 | Huawei Technologies Co., Ltd. | Multicast control method and apparatus |
| CN104780014A (en) * | 2014-01-09 | 2015-07-15 | 瑞昱半导体股份有限公司 | Wireless communication device and method of deciding transmission rate group of wireless communication device |
| CN104780014B (en) * | 2014-01-09 | 2018-07-13 | 瑞昱半导体股份有限公司 | The method of wireless communication apparatus and the transmission rate group for determining wireless communication apparatus |
| CN105323724A (en) * | 2015-06-03 | 2016-02-10 | 成都西加云杉科技有限公司 | Setting method and device for sending speed in multicast/broadcast technology |
| CN105323724B (en) * | 2015-06-03 | 2019-06-07 | 成都西加云杉科技有限公司 | The setting method and device of transmission rate in multicast/broadcast technology |
| CN107590094A (en) * | 2017-09-28 | 2018-01-16 | 深圳市道通科技股份有限公司 | A kind of serial duplex signaling method, apparatus and computer-readable recording medium |
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