CN112383963A - Dynamic time-space domain resource allocation access method based on directional antenna - Google Patents
Dynamic time-space domain resource allocation access method based on directional antenna Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 18
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- 238000004891 communication Methods 0.000 claims description 32
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- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
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- H—ELECTRICITY
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Abstract
The invention discloses a dynamic time-space domain resource allocation access method based on a directional antenna, which comprises the following steps: step one, monitoring a scanning message of a sending node and updating a local resource allocation table; step two, periodically broadcasting the resource allocation information of the nodes; step three, counting the demand number; step four, judging whether the time slot needs to be released or applied according to the number of the time slot sending requirements; step five, generating an application or release message according to the request type and the request mechanism; step six, the receiving node analyzes and confirms the request item in the request message according to the time slot application request message or the time slot release request message and the resource allocation table, generates a confirmation message and updates the resource allocation table; and step seven, the transmitting node updates the resource allocation table according to the received confirmation message. The invention enables the node to obtain the use right of more beam channels in the current time slot, and improves the channel utilization rate and the throughput.
Description
Technical Field
The invention relates to the field of communication ad hoc networks, and aims to realize the aim of maximally using channel resources by designing a time-space domain combined dynamic resource allocation access method based on directional antennas.
Background
The self-organizing network is one of research contents of communication technology hotspots, and a unique multi-hop decentralized dynamic networking mode enables the self-organizing network to have high application value in the aspects of military communication, post-disaster emergency communication, temporary meeting network and the like. In an ad hoc network, the MAC protocol is mainly responsible for access control of channels and allocation of channel resources. The performance of the MAC protocol plays an important role in the performance of the entire ad hoc network. The traditional access mechanism of time division multiple access technology divides a channel into different communication time slots according to time blocks, a network node acquires own time slot according to a set rule, when the channel time is in the time slot of a certain node, the node acquires the channel use right, and other nodes in the network can only receive data. When the communication time slot is over, the node loses the channel use right, and the time pointer points to the next communication time slot. That is, only one beam channel can be communicated in one time slot, the channel utilization rate is not high, and the throughput is low.
The performance of the first link connected as a network communication directly affects the strength of the communication transmission capability and the flexibility of the networking mode. Based on the defects of the access mechanism and the importance of access of the traditional time division multiple access technology, the invention provides a time-space domain dynamic resource allocation access method based on directional antennas, which can obtain the use right of a plurality of beam channels under the time slot of a node and greatly improve the channel utilization rate and the throughput.
Disclosure of Invention
The invention aims to provide a dynamic time-space domain resource allocation access method based on a directional antenna, so that a node can obtain the use right of more beam channels in the current time slot, and the channel utilization rate and the throughput are improved.
The schematic diagram of the principle of the scheme is shown in the attached figure 1, channels are divided into different communication blocks according to two dimensions of time and space, and nodes have the use rights of a plurality of spatial channels under the same time slot.
The time frame structure shown in fig. 2 is designed according to the principle, wherein the scanning time slot is mainly used for sending and receiving scanning messages, and new nodes are found through scanning a communication area; fixing time slots: the time slot pre-allocated by the node is the inherent time slot of the node; dynamic time slot: the time slots that can be dynamically applied and dynamically released are negotiated. According to different slot types, the following slot states are classified: scanning transmit slots, scanning receive slots, fixed transmit slots, fixed receive slots, dynamic transmit slots, dynamic receive slots, and idle slots (unused dynamic slots).
And the sending node sends the resource allocation information of the sending node to all the one-hop neighbor nodes of the sending node. And the receiving node maintains the resource allocation table of the receiving node according to the received scanning message and the resource allocation message. The resource allocation message comprises a resource allocation information message, a time slot application request message, a time slot release request message, a time slot application confirmation message and a time slot release confirmation message. The dynamic application and release flow is shown in figure 4.
In order to achieve the above object, the present invention provides a dynamic time-space domain resource allocation access method based on directional antennas, which comprises the following steps:
step one, monitoring a scanning message of a sending node and updating a local resource allocation table;
step two, periodically broadcasting the resource allocation information of the nodes;
step three, counting the demand number;
step four, judging whether the time slot needs to be released or applied according to the number of the time slot sending requirements;
step five, generating an application or release message according to the request type and the request mechanism;
step six, the receiving node analyzes and confirms the request item in the request message according to the time slot application request message or the time slot release request message and the resource allocation table, generates a confirmation message and updates the resource allocation table;
and step seven, the transmitting node updates the resource allocation table according to the received confirmation message.
In the first step, when a node in a network is powered on, an angle registry is preset in advance, a sending node updates a resource allocation table of the node according to the preset angle registry, then a scanning message is sent in a scanning sending time slot, and a receiving node updates the resource allocation table of the node after receiving the scanning message.
In the second step, the node periodically sends the resource allocation information of the node to all the one-hop neighbor nodes.
In the third step, the sending node converts the requirement for the number of sending time slots according to the current data traffic and the current transmission frame length.
In the fourth step, if the number of required time slots is greater than the number of existing transmission time slots, a time slot application request is initiated; and if the number of the required time slots is less than the number of the existing sending time slots, initiating a time slot release request.
The above dynamic time-space domain resource allocation access method based on the directional antenna, wherein in the fifth step, the application mechanism specifically is:
step 1, traversing and inquiring the resource allocation information of the receiving node collected by the sending node according to the time slot number: if the traversal is finished, jumping to the step 5; if the traversal is not finished, updating the current time slot number, and executing the step 2;
step 2, under the time slot number, whether the time slot state of the receiving node is a dynamic receiving time slot and the time slot state of the sending node is a dynamic sending time slot: if not, jumping to the step 1; if yes, executing step 3;
step 3, inquiring whether the existing beam angle of the receiving node and the communication angle of the sending node have conflict in the time slot: if so, jumping to the step 1; if not, applying for the time slot as the dynamic sending time slot of the sending node, and executing the step 4;
step 4, whether the number of the currently applied time slots meets the requirement or not: if the requirement is met, jumping to the step 9; if the requirement is not met, jumping to the step 1 to continue the query;
step 5, the collected resource allocation information of the receiving nodes is searched and sent according to the traversing of the time slot number: if the traversal is finished, jumping to the step 9; if the traversal is not finished, updating the current time slot number, and executing the step 6;
step 6, whether the time slot state of the receiving node under the time slot number is an idle time slot or not: if not, jumping to the step 5; if yes, executing step 7;
step 7, inquiring a resource allocation table of the sending node, wherein whether the time slot is a dynamic sending time slot and the angle does not conflict with the existing communication angle, or whether the time slot is an idle time slot: if yes, applying for the time slot as a dynamic sending time slot of the sending node, and executing the step 8; if not, jumping to the step 5;
step 8, whether the applied time slot number meets the requirement or not: if not, jumping to the step 5; if yes, executing step 9;
and 9, finishing the traversal query and generating a time slot application request message.
The above dynamic time-space domain resource allocation access method based on the directional antenna, wherein in the fifth step, the release mechanism specifically is:
step 1, inquiring a resource allocation table of a sending node, and sequencing the resource allocation table from small to large according to the number of sending angles in a time slot;
step 2, traversing the sequencing table, and checking whether the dynamic sending time slot contains the communication angle;
and 3, if the time slot is contained, applying to release the time slot: if only one communication angle exists under the time slot, the time slot is applied to be set as an idle time slot; if the communication angle is not more than one under the time slot, applying for releasing the communication angle and reserving other communication angles;
and 4, generating a time slot release message until the existing sending time slot meets the requirement.
Compared with the prior art, the invention has the technical beneficial effects that: the use weights of a plurality of beam channels can be obtained in the time slot where the node is located, and the channel utilization rate and the throughput are greatly improved.
Drawings
The invention provides a dynamic time-space domain resource allocation access method based on a directional antenna, which is provided by the following embodiments and attached drawings.
Fig. 1 is a schematic diagram of the time domain and space domain combined resource allocation principle of the present invention.
Fig. 2 is a time frame structure in the present invention.
Fig. 3 is a resource allocation table in the present invention, which is used for resource allocation between the local node and the node recording one-hop neighbor.
FIG. 4 is a diagram illustrating a dynamic resource application and release mechanism according to the present invention.
Detailed Description
The following describes a dynamic time-space domain resource allocation access method based on directional antennas in further detail with reference to the accompanying drawings.
Step 1: monitoring a scanning message of a sending node, and updating a local resource allocation table:
when a node in a network is powered on, an angle registry is preset in advance, a sending node updates a resource allocation table of the node according to the preset angle registry, then a scanning message is sent in a scanning sending time slot, and a receiving node updates the resource allocation table of the node after receiving the scanning message.
Step 2: resource allocation information of the periodic broadcast node:
the node periodically sends the resource allocation information of the node to all the one-hop neighbor nodes.
And 3, step 3: counting the number of demands:
the sending node converts the requirement for the number of sending time slots according to the current data service flow and the current transmission frame length.
And 4, step 4: judging whether the time slot needs to be released or applied according to the number of the time slot sending requirements:
a) if the number of the required time slots is larger than the number of the existing sending time slots, a time slot application request is initiated;
b) if the number of the required time slots is less than the number of the existing sending time slots, a time slot release request is initiated;
and 5, step 5: generating an application/release message according to the request type and the request mechanism;
5.1 application mechanism:
1) and traversing and inquiring the resource allocation information of the receiving node collected by the sending node according to the time slot number:
a) jumping to the step 5) if the traversal is finished;
b) if the traversal is not finished, updating the current time slot number, and executing the step 2);
2) with this slot number, is the slot state of the receiving node a dynamic receiving slot and is the slot state of the transmitting node a dynamic transmitting slot?
a) If not, jumping to the step 1);
b) if yes, executing step 3);
3) is there a conflict between the beam angle already existing at the receiving node in the time slot and the communication angle of the transmitting node queried?
a) If so, jumping to the step 1);
b) if not, applying the time slot as the dynamic sending time slot of the sending node, and executing the step
4)；
4) Is the number of slots currently applied to meet the demand?
a) If the requirement is met, jumping to the step 9);
b) if the requirement is not met, jumping to the step 1) to continue querying;
5) and traversing, inquiring and sending the collected resource allocation information of the receiving node according to the time slot number:
a) jumping to step 9) if the traversal is finished;
b) if the traversal is not finished, updating the current time slot number, and executing the step 6);
6) is the slot status of the receiving node free at that slot number?
a) If not, jumping to the step 5);
b) if yes, executing step 7);
7) is a sending node queried about its resource allocation table, is the slot a dynamic transmit slot and an angle that will not conflict with existing communication angles, or is the slot an idle slot?
a) If yes, applying for the time slot as a dynamic sending time slot of the sending node, and executing the step 8);
b) if not, jumping to the step 5);
8) is the number of slots already applied to meet the demand?
a) If not, jumping to the step 5);
b) if yes, executing step 9);
9) and finishing traversing inquiry, and generating a time slot application request message.
5.2 Release mechanism:
1) inquiring a resource allocation table of a sending node, and sequencing the resource allocation table from small to large according to the number of sending angles in a time slot;
2) traversing the sorting table, and checking whether the dynamic sending time slot contains the communication angle;
3) if yes, applying to release the time slot:
a) if only one communication angle exists under the time slot, the time slot is applied to be set as an idle time slot;
b) if the communication angle is not more than one under the time slot, applying for releasing the communication angle and reserving other communication angles;
4) and generating a time slot release message until the existing sending time slot meets the requirement.
And 6, step 6: and the receiving node analyzes and confirms the request item in the request message according to the time slot application request message/the time slot release request message and the resource allocation table, generates a confirmation message and updates the resource allocation table.
And 7, step 7: and the transmitting node updates the resource allocation table according to the received confirmation message.
Claims (7)
1. A dynamic time-space domain resource allocation access method based on a directional antenna is characterized by comprising the following steps:
step one, monitoring a scanning message of a sending node and updating a local resource allocation table;
step two, periodically broadcasting the resource allocation information of the nodes;
step three, counting the demand number;
step four, judging whether the time slot needs to be released or applied according to the number of the time slot sending requirements;
step five, generating an application or release message according to the request type and the request mechanism;
step six, the receiving node analyzes and confirms the request item in the request message according to the time slot application request message or the time slot release request message and the resource allocation table, generates a confirmation message and updates the resource allocation table;
and step seven, the transmitting node updates the resource allocation table according to the received confirmation message.
2. The access method of claim 1, wherein in the first step, when a node in a network is powered on, an angle registry is preset in advance, a sending node updates the resource allocation table of the node according to the preset angle registry, then a scanning message is sent in a scanning sending time slot, and a receiving node updates the resource allocation table of the node after receiving the scanning message.
3. The dynamic time-space domain resource allocation access method based on the directional antenna as claimed in claim 1, wherein in the second step, the node periodically sends the resource allocation information of the node to all the one-hop neighbor nodes.
4. The access method of claim 1, wherein in the third step, the transmitting node converts the requirement for the number of transmitting timeslots according to the current data traffic and the current transmission frame length.
5. The dynamic time-space domain resource allocation access method based on directional antenna as claimed in claim 1, wherein in said step four, if the number of required time slots is greater than the number of existing transmission time slots, a time slot application request is initiated; and if the number of the required time slots is less than the number of the existing sending time slots, initiating a time slot release request.
6. The dynamic time-space domain resource allocation access method based on the directional antenna as claimed in claim 1, wherein in the fifth step, the application mechanism is specifically:
step 1, traversing and inquiring the resource allocation information of the receiving node collected by the sending node according to the time slot number: if the traversal is finished, jumping to the step 5; if the traversal is not finished, updating the current time slot number, and executing the step 2;
step 2, under the time slot number, whether the time slot state of the receiving node is a dynamic receiving time slot and the time slot state of the sending node is a dynamic sending time slot: if not, jumping to the step 1; if yes, executing step 3;
step 3, inquiring whether the existing beam angle of the receiving node and the communication angle of the sending node have conflict in the time slot: if so, jumping to the step 1; if not, applying for the time slot as the dynamic sending time slot of the sending node, and executing the step 4;
step 4, whether the number of the currently applied time slots meets the requirement or not: if the requirement is met, jumping to the step 9; if the requirement is not met, jumping to the step 1 to continue the query;
step 5, the collected resource allocation information of the receiving nodes is searched and sent according to the traversing of the time slot number: if the traversal is finished, jumping to the step 9; if the traversal is not finished, updating the current time slot number, and executing the step 6;
step 6, whether the time slot state of the receiving node under the time slot number is an idle time slot or not: if not, jumping to the step 5; if yes, executing step 7;
step 7, inquiring a resource allocation table of the sending node, wherein whether the time slot is a dynamic sending time slot and the angle does not conflict with the existing communication angle, or whether the time slot is an idle time slot: if yes, applying for the time slot as a dynamic sending time slot of the sending node, and executing the step 8; if not, jumping to the step 5;
step 8, whether the applied time slot number meets the requirement or not: if not, jumping to the step 5; if yes, executing step 9;
and 9, finishing the traversal query and generating a time slot application request message.
7. The dynamic time-space domain resource allocation access method based on the directional antenna as claimed in claim 1, wherein in the fifth step, the release mechanism is specifically:
step 1, inquiring a resource allocation table of a sending node, and sequencing the resource allocation table from small to large according to the number of sending angles in a time slot;
step 2, traversing the sequencing table, and checking whether the dynamic sending time slot contains the communication angle;
and 3, if the time slot is contained, applying to release the time slot: if only one communication angle exists under the time slot, the time slot is applied to be set as an idle time slot; if the communication angle is not more than one under the time slot, applying for releasing the communication angle and reserving other communication angles;
and 4, generating a time slot release message until the existing sending time slot meets the requirement.
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Cited By (1)
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