CN103237323B - Based on multichannel parallel node acceptance method - Google Patents
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Abstract
The invention discloses a kind of based on multichannel parallel node acceptance method, mainly solve existing node acceptance method and receive the problem that efficiency is not high.Implementation step is: allocation of channel resources, divides the receiving cycle; The time slot of different purposes is planned within each receiving cycle; Utilize descending and uplink detection frame slot, form two-way signalling path; Utilize descending explore frame, complete downlink power control and down channel training; Slave node selects idle two-way signalling path, concurrently serves row explore frame; Centroid, according to the uplink detection frame received, sends descending explore frame; Slave node receives descending explore frame, the state of the two-way signalling path selected by inquiry; According to the state inquired, complete node and receive process.It is short that the present invention has the receiving time, not easily clashes when slave node is many, receives the advantage that efficiency is high, can be applicable to local area network (LAN) and the Access Network field of various employing time division multiplexing/time division multiple access scheme allocated channel.
Description
Technical field
The invention belongs to communication technical field, relate to a kind of node acceptance method, can be applicable to local area network (LAN) and the Access Network field of various employing time division multiplexing/time division multiple access scheme allocated channel.
Background technology
Based in the local area network (LAN) of shared medium and Access Network, the normal point-to-multipoint logical topological structure adopting a Ge You center.In this network configuration, there is a Centroid and multiple slave node, other node except Centroid is called slave node.Directly can carry out data communication between Centroid and slave node, the communication between each slave node generally needs to be forwarded by Centroid.A new slave node power-up initializing or after resetting, to register and the process joining existing system is called that node is received to Centroid.Usually, after node has been received, just normal data communication can be carried out.Receive for completing node, Centroid and slave node need repeatedly interactive information usually.In the process, channel is divided into continuously and the receiving cycle of non-overlapping copies in time; Each receiving cycle contains descending explore frame time slot and uplink detection frame slot; Descending explore frame time slot is used for Centroid and generates and sends descending explore frame, and uplink detection frame slot is used for slave node and generates and sends uplink detection frame.Uplink/downlink explore frame mainly completes the channel training of physical layer, and carries Centroid and the MAC layer uplink/downlink signaling frame mutual in node receiving process of slave node.The initial time of adjacent two descending explore frames is spaced apart a receiving cycle.
In already present network system, usually adopt based on single pass man-to-man acceptance method.In this approach, each receiving cycle, only containing a descending explore frame time slot and a uplink detection frame slot, is respectively used to Centroid and sends a descending explore frame and slave node sends a uplink detection frame; A uplink/downlink explore frame is for carrying out the channel training of physical layer and carrying row on the way/descending MAC layer signaling frame that node receives process respectively; The receiving of Centroid to each slave node is carried out in a serial fashion, namely only has a slave node to receive the rear receiving just carrying out next slave node.
Above-mentioned node acceptance method is at present based on widely used method in the local area network (LAN) of shared medium and Access Network, but also exist slave node many time receive the time long, receive the shortcoming that request easily clashes.
In local area network (LAN) and Access Network, usual slave node is more, and Centroid has needed the receiving process to multiple slave node.And based in single pass man-to-man acceptance method, the uplink/downlink explore frame transmitted in a uplink/downlink explore frame time slot carries row/downlink signaling frame on the way.A Centroid can only carry out the receiving process of a slave node simultaneously, when multiple slave node needs to be received in network simultaneously, need to wait for that the long period just can complete whole receiving process, especially restore electricity when causing each slave node to power on after power failure, Centroid completes the receiving process need long time of all slave nodes simultaneously; And after current affiliation node completes receiving process; the slave node to be accepted such as a large amount of can compete cashier machine meeting usually at unique uplink detection frame slot; send simultaneously and receive request; thus clash; cause time waste; the slave node clashed can only send receiving request by the uplink detection frame slot within the receiving cycle afterwards again, therefore extends the receiving time further.
Summary of the invention
The object of the invention is to the deficiency for above-mentioned prior art, propose a kind of based on multichannel parallel node acceptance method, to shorten the receiving time, reduce collision probability, improve and receive efficiency, save channel resource simultaneously.
For achieving the above object, technical scheme of the present invention comprises the steps:
(1) adopt time division multiplexing/time division multiple access scheme allocation of channel resources, to descending employing time division multiplexing, to up employing time division multiple access, channel is divided in time continuously and the receiving cycle of non-overlapping copies;
(2) within each receiving cycle, adopt fixing planning or Dynamic Programming mode, cook up the time slot of following different purposes:
Send several downlink data frame slots of downlink data frame for Centroid, send several upstream data frame slots of uplink data frames for slave node;
Send several descending control frame time slots of descending control frame for Centroid, send several upload control frame slots of upload control frame for slave node;
A descending explore frame time slot of a down physical layer explore frame is sent for Centroid;
N number of uplink detection frame slot of N number of upstream physical layer explore frame is sent for slave node;
(3) the descending explore frame time slot utilizing step (2) to plan to obtain and N number of uplink detection frame slot, form N number of two-way signalling path:
(3a) the down physical layer explore frame sent at a descending explore frame time slot is utilized, mark off N number of descending MAC layer signaling frame passage, the descending MAC layer signaling frame in carrying N road, each passage carries a descending MAC layer signaling frame in road, described MAC layer, refers to medium access control layer;
(3b) utilize the upstream physical layer explore frame sent at a uplink detection frame slot, a up MAC layer signaling frame passage is provided, carries row MAC layer signaling frame on the way;
(3c) N number of descending MAC layer signaling frame passage is corresponding with N number of up MAC layer signaling frame passage, form N number of two-way signalling path, i.e. i-th corresponding i-th up MAC layer signaling frame passage of descending MAC layer signaling frame passage, form i-th two-way signalling path, with mark in the descending MAC layer signaling frame of each descending MAC layer signaling frame passage carrying, show that the current state of the two-way signalling path of its correspondence is in busy or idle;
(4) Centroid sends descending explore frame at descending explore frame time slot, the descending explore frame of slave node continuous reception, and utilize descending explore frame to carry out downlink power control and down channel training, after completing downlink power control and down channel training, enter step (5);
(5) slave node receives descending explore frame, the mark in the descending MAC layer signaling frame in inquiry N road, and the number of the two-way signalling path that statistics is idle is M, if M=0, then waits for that one is received all after dates to repeat step (5); If M>0, then Stochastic choice two-way signalling path in the two-way signalling path of this M free time, sends at the uplink detection frame slot of its correspondence and receives request;
(6) Centroid upgrades the mark in the descending MAC layer signaling frame in N road, sends descending explore frame:
If Centroid does not receive uplink detection frame at some uplink detection frame slots, then the mark in the descending MAC layer signaling frame keeping this time slot corresponding is constant, and at descending explore frame time slot, Centroid sends descending explore frame;
If Centroid have received uplink detection frame at some uplink detection frame slots, be then set to busy by the mark in descending MAC layer signaling frame corresponding for this time slot, at descending explore frame time slot, Centroid utilizes this two-way signalling path to send and receives response;
(7) slave node receives descending explore frame, the mark in the descending MAC layer signaling frame that the two-way signalling path selected by inquiry is corresponding:
If be masked as the free time, then the receiving request of slave node there occurs conflict, and slave node performs back off algorithm, waits for several receivings cycle, returns step (5);
If be masked as busy, then the receiving request of slave node sends successfully, slave node and Centroid utilize this two-way signalling path to carry out up channel training or uplink power control, Centroid utilizes this two-way signalling path broadcast channel parameter, finally by Centroid, the mark in descending MAC layer signaling frame corresponding for this two-way signalling path is set to the free time, completes the receiving process of this slave node.
The present invention has the following advantages with tool compared with single pass man-to-man acceptance method:
1, present invention achieves parallel receiving, shorten the receiving time, decrease collision probability, improve receiving efficiency.
Based on single pass man-to-man acceptance method, a receiving cycle only distributes a uplink and downlink explore frame time slot, and carry row and downlink signaling frame on the way respectively, therefore Centroid can only carry out the receiving process of a slave node simultaneously, after present node has been received, other slave nodes could send receives request, therefore receives the time long.And the invention provides N number of two-way signalling path, the parallel receiving of maximum N number of slave node can be realized simultaneously, shorten the receiving time, improve receiving efficiency.In addition, when a lot of slave node is simultaneously etc. to be accepted, based on single pass man-to-man acceptance method after present node completes receiving process, the slave node to be accepted such as a large amount of sends at unique uplink detection frame slot request of receiving simultaneously, be easy to clash, thus extend the receiving time further.And the present invention has divided N number of two-way signalling path, slave node is Stochastic choice passage from the two-way signalling path of multiple free time, send at the uplink detection frame slot of its correspondence and receive request, decrease the slave node quantity in the meeting of same uplink detection frame slot competition cashier machine, thus reduce collision probability, improve receiving efficiency.
2, the present invention is while the parallel receiving of realization, effectively saves channel resource.
In parallel acceptance method of the present invention, only utilize a descending explore frame time slot can provide N road downlink signaling frame passage, the shared descending explore frame time slot of each slave node just can carry out down channel training and downlink power control simultaneously, thus effectively saves channel resource.
Accompanying drawing explanation
Fig. 1 is the realization flow figure of first embodiment of the invention;
Fig. 2 fixes planning chart in the receiving cycle in the embodiment of the present invention one;
Fig. 3 is the MAC layer signaling frame channel design figure in the embodiment of the present invention;
Fig. 4 is the realization flow figure of second embodiment of the invention;
Fig. 5 is the receiving cycle Dynamic Programming figure in the embodiment of the present invention two.
Embodiment
Below in conjunction with accompanying drawing, content of the present invention is further elaborated.
Embodiment one
In this example, the network of the present invention's application is made up of a Centroid 0 and 64 slave nodes, and wherein four slave nodes 1,2,3,4 prepare to perform receiving process after powering on.
With reference to Fig. 1, the performing step of this example is as follows:
Step 1, allocation of channel resources, marks off the receiving cycle.
Adopt time division multiplexing/time division multiple access scheme allocation of channel resources, namely to descending employing time division multiplexing, to up employing time division multiple access, channel is divided in time continuously and the receiving cycle of non-overlapping copies, each receiving cycle contains descending explore frame time slot and uplink detection frame slot, and the initial time of adjacent two descending explore frames is spaced apart a receiving cycle.In the present embodiment, the time span of receiving the cycle is fixed length, is set to 20000us.
Step 2, adopts fixing planning, cooks up the time slot of different purposes within each receiving cycle.
(2a) receive the original position in cycle to distribute a descending explore frame time slot at first, send descending explore frame for Centroid;
(2b) receive the centre position in cycle to distribute a uplink detection frame slot at first, distributed before this time slot
individual uplink detection frame slot, distributes after this time slot
individual uplink detection frame slot, altogether N number of uplink detection frame slot, all send uplink detection frame for slave node, N>=2;
(2c) after first is received the descending explore frame time slot in cycle, distribute several downlink data frame slots and several descending control frame time slots, after first is received N number of uplink detection frame slot in cycle, distribute several upstream data frame slots and several upload control frame slots;
(2d) repeat step (2a)-step (2c), plan all receiving cycles.
In the present embodiment, the program results in a receiving cycle, as shown in Figure 2.Several descending and upstream data frame slots, several descending and upload control frame slot, 1 descending explore frame time slot and 8 uplink detection frame slots have been marked in Fig. 2.
Step 3, the descending and uplink detection frame slot utilizing step 2 to cook up, forms two-way signalling path.
(3a) utilize the down physical layer explore frame sent at a descending explore frame time slot, mark off N number of descending MAC layer signaling frame passage, the descending MAC layer signaling frame in carrying N road;
(3b) utilize the upstream physical layer explore frame sent at a uplink detection frame slot, a up MAC layer signaling frame passage is provided, carries row MAC layer signaling frame on the way;
(3c) N number of descending MAC layer signaling frame passage is corresponding with N number of up MAC layer signaling frame passage, form N number of two-way signalling path, namely i-th corresponding i-th up MAC layer signaling frame passage of descending MAC layer signaling frame passage, forms i-th two-way signalling path;
In the present embodiment, utilize 1 descending explore frame, 8 descending MAC layer signaling frame passages are gone out by frequency partition, 8 uplink detection frames are utilized to provide 8 up MAC layer signaling frame passages, by 8 corresponding 8 up MAC layer signaling frame passages of descending MAC layer signaling frame passage, form 8 two-way signalling paths, as shown in Figure 3.
Step 4, Centroid sends descending explore frame at descending explore frame time slot, the descending explore frame of slave node continuous reception, and utilizes descending explore frame to complete downlink power control and down channel training.
In the present embodiment, the descending explore frame that Centroid 0 sends carries the 8 descending MAC layer signaling frames in tunnel, mark wherein in the 1st tunnel, the descending MAC layer signaling frame in the 4th road and the 7th tunnel is the free time, and its type is sky frame, and the mark in other descending MAC layer signaling frames is busy;
Four descending explore frames of slave node 1,2,3,4 continuous reception, detect the signal strength signal intensity of descending explore frame, according to the gain of signal strength signal intensity adjustment received power, make to receive function and accurately receive descending explore frame, complete downlink power control;
Four slave nodes 1,2,3,4 extract training sequence signal from descending explore frame signal, according to training sequence number Signal estimation physical layer channel parameter, make slave node can select modulation format according to channel parameter, complete down channel training.
Step 5, slave node receives descending explore frame, the mark in the descending MAC layer signaling frame in inquiry N road, the number of the two-way signalling path that statistics is idle.
In the present embodiment, slave node 1,2,3, mark in the 8 descending MAC layer signaling frames in tunnel of the descending explore frame carrying of 4 inquiry, find to be masked as the free time in the 1st tunnel, the descending MAC layer signaling frame in the 4th road and the 7th tunnel, obtain the 1st, the 4th and the 7th two-way signalling path is idle, the number counting idle two-way signaling channel is M=3.
Step 6, slave node is selector channel from the two-way signalling path counted, and the type of the up MAC layer signaling frame carried is set to receives request, and row explore frame time slot sends uplink detection frame thereon:
First slave node 1, selects the 7th two-way signalling path from three the two-way signaling channels counted, and the type of the 7th up MAC layer signaling frame in tunnel is set to and receives request, and sends uplink detection frame at the 7th uplink detection frame slot;
Second slave node 2, selects the 1st two-way signalling path from three the two-way signaling channels counted, and the type of the 1st up MAC layer signaling frame in tunnel is set to and receives request, and sends uplink detection frame at the 1st uplink detection frame slot;
3rd slave node 3 and the 4th slave node 4, all from three the two-way signaling channels counted, select the 4th two-way signalling path, the type of the 4th up MAC layer signaling frame in tunnel is set to and receives request, and send uplink detection frame at the 4th uplink detection frame slot simultaneously.
Step 7, Centroid upgrades the mark in the downlink signaling frame of N road, sends descending explore frame.
In the present embodiment, Centroid 0 have received the uplink detection frame of slave node 2 transmission at the 1st uplink detection frame slot, inquire about the type of the up MAC layer signaling frame of this frame carrying, the type obtaining this signaling frame receives request, therefore the mark in the 1st tunnel descending MAC layer signaling frame is set to busy by Centroid 0, its type is set to and receives response;
Because the receiving request of slave node 3 and the receiving request of slave node 4 clash at the 4th uplink detection frame slot, therefore Centroid 0 does not receive uplink detection frame at the 4th uplink detection frame slot, Centroid 0 keeps being masked as the free time in the 4th descending MAC layer signaling frame in tunnel, keeps the type of this signaling frame to be empty frame;
Centroid 0 have received the uplink detection frame of slave node 1 transmission at the 7th uplink detection frame slot, inquire about the type of the up MAC layer signaling frame of this frame carrying, the type obtaining this signaling frame receives request, therefore the mark in the 7th tunnel descending MAC layer signaling frame is set to busy by Centroid 0, its type is set to and receives response;
At descending explore frame time slot, Centroid 0 sends descending explore frame, this frame carries the 8 descending MAC layer signaling frames in tunnel, wherein the mark of the 1st tunnel, the descending MAC layer signaling frame in the 4th road and the 7th tunnel and type described above, mark and the type of other descending MAC layer signaling frames are constant.
Step 8, slave node receives descending explore frame, the mark in the descending MAC layer signaling frame that the two-way signalling path selected by inquiry is corresponding.
In the present embodiment, slave node 1 receives descending explore frame, inquire in the 7th tunnel descending MAC layer signaling frame be masked as busy;
Slave node 2 receives descending explore frame, inquire in the 1st tunnel descending MAC layer signaling frame be masked as busy;
Slave node 3 and slave node 4 receive descending explore frame, all inquire to be masked as the free time in the 4th descending MAC layer signaling frame in tunnel.
Step 9, according to the mark in the descending MAC layer signaling frame that the two-way signalling path inquired is corresponding, proceeds as follows:
Slave node 2 and Centroid 0 utilize the 1st two-way signalling path to complete up channel training and uplink power control;
Slave node 1 and Centroid 0 utilize the 7th two-way signalling path to complete up channel training and uplink power control;
Centroid 0 utilizes the 1st and the 7th two-way signalling path broadcast channel parameter;
Mark in 1st and descending MAC layer signaling frame corresponding to the 7th two-way signalling path is set to the free time by Centroid 0, complete the receiving process of slave node 1 and slave node 2, slave node 1 and slave node 2 utilize data frame interval and control frame time slot to carry out data communication afterwards;
Slave node 3 and slave node 4 perform back off algorithm, wait for several receivings cycle, return step 5.
Embodiment two
In this example, the network of the present invention's application is made up of a Centroid 0 and 32 slave nodes, and wherein two slave nodes 1,2 prepare to perform receiving process after powering on.
With reference to Fig. 4, the performing step of the present embodiment is as follows:
Step 1, allocation of channel resources, marks off the receiving cycle.
Adopt time division multiplexing/time division multiple access scheme allocation of channel resources, namely to descending employing time division multiplexing, to up employing time division multiple access, channel is divided in time continuously and the receiving cycle of non-overlapping copies, each receiving cycle contains descending explore frame time slot and uplink detection frame slot, and the initial time of adjacent two descending explore frames is spaced apart a receiving cycle.In the present embodiment, the time span of receiving the cycle is fixed length, is set to 20000us.
Step 2, adopts Dynamic Programming, cooks up the time slot of different purposes within each receiving cycle.
(2a) receive the original position in cycle to distribute a descending explore frame time slot at first, send descending explore frame for Centroid;
(2b) receive the centre position in cycle to distribute a uplink detection frame slot at first, distributed before this time slot
individual uplink detection frame slot, distributes after this time slot
individual uplink detection frame slot, altogether N number of uplink detection frame slot, all send uplink detection frame for slave node, N>=2;
(2c) after first is received the descending explore frame time slot in cycle, distribute several downlink data frame slots and several descending control frame time slots, after first is received N number of uplink detection frame slot in cycle, distribute several upstream data frame slots and several upload control frame slots;
(2d), after first receiving end cycle, Centroid operation dispatching algorithm, plans that second is received the cycle.The rest may be inferred, plans all receiving cycles.
In the present embodiment, the program results in two receiving cycles, as shown in Figure 5.In Fig. 5, first receiving cycle has marked 3000 downlink data frame slots, 50 descending control frame time slots, 1000 upstream data frame slots, 50 upload control frame slots, 1 descending explore frame time slot and 8 uplink detection frame slots, and second receiving cycle has marked 2500 downlink data frame slots, 50 descending control frame time slots, 500 upstream data frame slots, 50 upload control frame slots, 1 descending explore frame time slot and 8 uplink detection frame slots.
Step 3, the descending and uplink detection frame slot utilizing step 2 to cook up, forms two-way signalling path.
(3a) utilize the down physical layer explore frame sent at a descending explore frame time slot, mark off N number of descending MAC layer signaling frame passage, the descending MAC layer signaling frame in carrying N road;
(3b) utilize the upstream physical layer explore frame sent at a uplink detection frame slot, a up MAC layer signaling frame passage is provided, carries row MAC layer signaling frame on the way;
(3c) N number of descending MAC layer signaling frame passage is corresponding with N number of up MAC layer signaling frame passage, form N number of two-way signalling path, namely i-th corresponding i-th up MAC layer signaling frame passage of descending MAC layer signaling frame passage, forms i-th two-way signalling path;
In the present embodiment, utilize 1 descending explore frame, 8 descending MAC layer signaling frame passages are gone out by frequency partition, 8 uplink detection frames are utilized to provide 8 up MAC layer signaling frame passages, by 8 corresponding 8 up MAC layer signaling frame passages of descending MAC layer signaling frame passage, form 8 two-way signalling paths, as shown in Figure 3.
Step 4, Centroid sends descending explore frame at descending explore frame time slot, the descending explore frame of slave node continuous reception, and utilizes descending explore frame to complete downlink power control and down channel training.
In the present embodiment, the descending explore frame that Centroid 0 sends carries the 8 descending MAC layer signaling frames in tunnel, and the mark wherein in the descending MAC layer in each road signaling frame is busy;
Two descending explore frames of slave node 1,2 continuous reception, detect the signal strength signal intensity of descending explore frame, according to the gain of signal strength signal intensity adjustment received power, make to receive function and accurately receive descending explore frame, complete downlink power control;
Two slave nodes 1,2 extract training sequence signal from descending explore frame signal, according to training sequence number Signal estimation physical layer channel parameter, make slave node can select modulation format according to channel parameter, complete down channel training.
Step 5, slave node receives descending explore frame, the mark in the descending MAC layer signaling frame in inquiry N road, the number of the two-way signalling path that statistics is idle.
In the present embodiment, slave node 1, the mark in the 8 descending MAC layer signaling frames in tunnel of the descending explore frame carrying of 2 inquiry, finds that the mark in the descending MAC layer signaling frame of this 8 tunnel is busy, it is all busy for obtaining 8 two-way signalling paths, and the number counting idle two-way signaling channel is M=0.
Step 6, be 0 according to the free time two-way signaling channel that step 5 counts, slave node 1 and slave node 2 return step 5 after waiting for this receiving end cycle.
Because the two-way signaling channel counting the free time is 0, namely within this receiving cycle, 8 two-way signalling paths are all carrying out the receiving process of other slave nodes, slave node 1 cannot be used for, 2 send uplink detection frame, therefore slave node 1 and slave node 2 all do not send uplink detection frame within this receiving cycle, after waiting for this receiving end cycle, return step 5.
More than describing is only two instantiations of the present invention; do not form any limitation of the invention; obviously for those skilled in the art; after having understood content of the present invention and principle; all may when not deviating from the principle of the invention, structure; carry out the various correction in form and details and change, but these corrections based on inventive concept and change are still within claims of the present invention.
Claims (7)
1., based on a multichannel parallel node acceptance method, comprise the steps:
(1) adopt time division multiplexing/time division multiple access scheme allocation of channel resources, to descending employing time division multiplexing, to up employing time division multiple access, channel is divided in time continuously and the receiving cycle of non-overlapping copies;
(2) within each receiving cycle, adopt fixing planning or Dynamic Programming mode, cook up the time slot of following different purposes:
Send several downlink data frame slots of downlink data frame for Centroid, send several upstream data frame slots of uplink data frames for slave node;
Send several descending control frame time slots of descending control frame for Centroid, send several upload control frame slots of upload control frame for slave node;
A descending explore frame time slot of a down physical layer explore frame is sent for Centroid;
N number of uplink detection frame slot of N number of upstream physical layer explore frame is sent for slave node;
(3) the descending explore frame time slot utilizing step (2) to plan to obtain and N number of uplink detection frame slot, form N number of two-way signalling path:
(3a) the down physical layer explore frame sent at a descending explore frame time slot is utilized, mark off N number of descending MAC layer signaling frame passage, the descending MAC layer signaling frame in carrying N road, each passage carries a descending MAC layer signaling frame in road, described MAC layer, refers to medium access control layer;
(3b) utilize the upstream physical layer explore frame sent at a uplink detection frame slot, a up MAC layer signaling frame passage is provided, carries row MAC layer signaling frame on the way;
(3c) N number of descending MAC layer signaling frame passage is corresponding with N number of up MAC layer signaling frame passage, form N number of two-way signalling path, i.e. i-th corresponding i-th up MAC layer signaling frame passage of descending MAC layer signaling frame passage, form i-th two-way signalling path, with mark in the descending MAC layer signaling frame of each descending MAC layer signaling frame passage carrying, show that the current state of the two-way signalling path of its correspondence is in busy or idle;
(4) Centroid sends down physical layer explore frame at descending explore frame time slot, slave node continuous reception down physical layer explore frame, and utilize down physical layer explore frame to carry out downlink power control and down channel training, after completing downlink power control and down channel training, enter step (5);
(5) slave node receives down physical layer explore frame, the mark in the descending MAC layer signaling frame in inquiry N road, and the number of the two-way signalling path that statistics is idle is M, if M=0, then repeats step (5) after waiting for this receiving end cycle; If M>0, then Stochastic choice two-way signalling path in the two-way signalling path of this M free time, sends at the uplink detection frame slot of its correspondence and receives request;
(6) Centroid upgrades the mark in the descending MAC layer signaling frame in N road, sends down physical layer explore frame:
If Centroid does not receive at some uplink detection frame slots and receives request, then the mark in the descending MAC layer signaling frame keeping this time slot corresponding is constant, and at descending explore frame time slot, Centroid sends down physical layer explore frame;
If Centroid have received at some uplink detection frame slots and receives request, be then set to busy by the mark in descending MAC layer signaling frame corresponding for this time slot, at descending explore frame time slot, Centroid utilizes this two-way signalling path to send and receives response;
(7) slave node receives down physical layer explore frame, the mark in the descending MAC layer signaling frame that the two-way signalling path selected by inquiry is corresponding:
If be masked as the free time, then the receiving request of slave node there occurs conflict, and slave node performs back off algorithm, waits for several receivings cycle, returns step (5);
If be masked as busy, then the receiving request of slave node sends successfully, slave node and Centroid utilize this two-way signalling path to complete up channel training or uplink power control, Centroid utilizes this two-way signalling path broadcast channel parameter, finally by Centroid, the mark in descending MAC layer signaling frame corresponding for this two-way signalling path is set to the free time, completes the receiving process of this slave node.
2. node acceptance method according to claim 1, in the receiving cycle in wherein said step (1), its time length setting is fixed length or random length.
3. node acceptance method according to claim 1, wherein said step fixes planning mode in (2), refer within each receiving cycle, the quantity of data frame interval and the quantity of position, control frame time slot are all the same with position, the position of descending explore frame time slot, the quantity of uplink detection frame slot with position.
4. node acceptance method according to claim 1, Dynamic Programming mode in wherein said step (2), refer within the difference receiving cycle, quantity and position, the position of descending explore frame time slot, the quantity of uplink detection frame slot and the position of the quantity of data frame interval and position, control frame time slot are all to adjust.
5. node acceptance method according to claim 1, marks off N number of descending MAC layer signaling frame passage wherein described in step (3a), is to divide by frequency partition or code word.
6. node acceptance method according to claim 1, utilizing down physical layer explore frame to carry out downlink power control in wherein said step (4), is adjusted according to the gain of signal strength signal intensity to received power detecting the down physical layer explore frame received by slave node.
7. node acceptance method according to claim 1, down physical layer explore frame is utilized to carry out down channel training in wherein said step (4), be first from the down physical layer explore frame signal received, extract training sequence signal by slave node, then according to this training sequence signal, physical layer channel parameter estimated.
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| CN105025587A (en) * | 2014-07-29 | 2015-11-04 | 魅族科技（中国）有限公司 | Wireless local area network access method, equipment and system |
| CN105471563B (en) * | 2015-11-16 | 2018-12-07 | 海能达通信股份有限公司 | Dynamically distribute pulling method and communication equipment in the data of up channel |
| CN109831831B (en) * | 2019-03-07 | 2022-03-04 | 西安电子科技大学 | Node admission method based on competition sequencing |
| CN111614526B (en) * | 2020-04-20 | 2021-09-21 | 北京瀚诺半导体科技有限公司 | Method, device, storage medium and terminal for rapidly maintaining HINOC link |
| CN114630434B (en) * | 2022-03-18 | 2024-05-14 | 西安电子科技大学 | Competition ordering and admitting method based on unknown number of nodes |
| CN115276935B (en) * | 2022-07-14 | 2023-04-07 | 深圳鹏龙通科技有限公司 | Signal frame sending method and device |
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| CN101394317A (en) * | 2007-09-21 | 2009-03-25 | 中国科学院沈阳自动化研究所 | Channel switching mode generation and distribution method for multi-channel wireless multi-hop network |
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