CN113347583A - High-frequency fine-capacity Beidou short message sending method - Google Patents
High-frequency fine-capacity Beidou short message sending method Download PDFInfo
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- CN113347583A CN113347583A CN202110701387.3A CN202110701387A CN113347583A CN 113347583 A CN113347583 A CN 113347583A CN 202110701387 A CN202110701387 A CN 202110701387A CN 113347583 A CN113347583 A CN 113347583A
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- beidou
- linked list
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/12—Messaging; Mailboxes; Announcements
- H04W4/14—Short messaging services, e.g. short message services [SMS] or unstructured supplementary service data [USSD]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
Abstract
A big dipper short message sending method with high frequency and fine capacity belongs to the field of wireless communication, and comprises the following steps: A. building a Beidou terminal sending waiting linear linked list and a ready linear linked list; the Beidou terminal in the sending waiting linear linked list is a terminal which does not acquire sending authority; the Beidou terminal in the ready linear linked list is the terminal which has acquired the sending authority; B. when a Beidou terminal in the sending waiting linear linked list acquires the sending authority, the terminal is moved from the sending waiting linear linked list to a ready linear linked list; C. when a short message needs to be sent, obtaining the Beidou terminal from the ready linked list for sending; if the ready linked list is empty, waiting; and the Beidou terminal which finishes sending the short message moves to a sending waiting linear linked list. Through the improvement of a short message sending mechanism of the Beidou terminal, the Beidou terminals with different emission frequencies and different levels form a cluster to send high-frequency short messages by utilizing the characteristics of a linear linked list, so that the utilization efficiency of channel capacity resources of the Beidou system is improved.
Description
Technical Field
The invention belongs to the field of wireless communication, and particularly relates to a high-frequency precise-capacity Beidou short message sending method.
Background
With the development of the beidou business in China, the beidou short message function is largely used, but the beidou short message still has the following limitations in the aspect of application of remote data transmission and control:
1. and (3) capacity limitation: by adopting a short message communication mode, one-time communication has communication capacity limitation, namely the length of each communication content is limited, the communication capacity is small, so that the data volume transmitted in real time is generally small, and when a large amount of data needs to be transmitted in real time, the data transmission rate is far from enough. The Beidou user terminal transmitting chip or the SIM card is divided into 4 grades (Beidou II), and the higher the grade is, the larger the capacity of transmitting short messages in a single time is.
2. And limiting the emission frequency: because of the processing rate and the total number of the user caps, the frequency and the communication level of authorized users are severely limited, the Beidou SI M card which can be taken by ordinary users is usually a three-level card (not more than 78.5 Byte), and the frequency is not lower than 60 s.
In order to meet the requirement of transmitting the Beidou short message at high frequency, a user can build a Beidou short message transmitting cluster (consisting of Beidou terminals with different transmitting frequencies and different levels) which is built by a plurality of transmitting terminals, and the purpose of transmitting the Beidou short message at high frequency is achieved by switching transmitting among the cluster transmitting terminals.
In order to improve the utilization efficiency of the short message channel resources of the Beidou system, the Beidou terminals of proper levels are often selected to transmit according to the specific capacity of transmitting the short message content, so that how to switch the transmitting terminals among clusters is realized, the most efficient utilization of the cluster transmitting frequency resources can be ensured, the utilization efficiency of the channel capacity resources of the Beidou system can be improved, and the technical problem to be solved urgently is solved.
Chinese patent applications 201620397191.4, 201610917457.8 both disclose devices that support multi-card delivery, but do not disclose how to efficiently use different levels of user cards.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a high-frequency precise-capacity Beidou short message sending method, wherein a short message sending mechanism of a Beidou terminal is improved, and the characteristics of a linear linked list are utilized, so that Beidou terminals with different emission frequencies and different grades form a cluster to send high-frequency precise-capacity short messages, and therefore, the utilization efficiency of channel capacity resources of a Beidou system is improved.
The technical scheme adopted by the invention is as follows: a high-frequency fine-capacity Beidou short message sending method comprises the following steps:
A. building a Beidou terminal sending waiting linear linked list and a ready linear linked list;
the Beidou terminal in the sending waiting linear linked list is a terminal which does not acquire sending authority;
the Beidou terminal in the ready linear linked list is the terminal which has acquired the sending authority;
B. when a Beidou terminal in the sending waiting linear linked list acquires the sending authority, the terminal is moved from the sending waiting linear linked list to a ready linear linked list;
C. when a short message needs to be sent, obtaining the Beidou terminal from the ready linked list for sending; if the ready linked list is empty, waiting; and the Beidou terminal which finishes sending the short message moves to a sending waiting linear linked list.
Furthermore, each Beidou terminal is provided with a weight P, the initial value of P is P =1/S, and S is the transmitting frequency of the terminal and the unit is second;
the weight P changes along with time, P =1/T, T is the time of the terminal for obtaining the sending authority; and when T =0, the terminal is moved from the sending waiting linear linked list to the ready linear linked list.
Further, the Beidou terminals in the sending and waiting linear linked list are sequentially sorted from large to small according to the weight.
Further, the Beidou terminals in the ready linear linked list are sorted according to the time from the last sending of the short message, and the longer the time is, the earlier the sorting is; and when the short message needs to be sent, obtaining the Beidou terminal with the most front sequencing from the ready linked list and sending the Beidou terminal.
Further, after the Beidou terminal sends the short message, the weight is set as an initial value and placed at a proper position in the sending waiting linear linked list.
Further, when the short message is sent, the Beidou terminal with the sending capacity matched with the message length is selected from the ready linear linked list.
Further, when a short message is sent, if the message capacity is not matched with the Beidou terminal in the ready linear linked list, message segmentation is carried out; the principle of message segmentation is that the number of Beidou terminals for message sending is minimum.
The technical scheme of the invention is that two linear linked list structures are adopted, namely a sending waiting linear linked list and a ready linear linked list, and the Beidou terminal is switched back and forth in the two linked lists, so that the sending and waiting of the Beidou terminals with different transmitting frequencies and different grades are realized, the channel capacity resources of the Beidou system are reasonable to the maximum extent, and the requirement of sending short messages of the Beidou terminal with high frequency is met. Simultaneously, according to the capacity of the short message, the Beidou terminals in the current readiness linked list are matched, and if the Beidou terminals meet the condition that the sending capacity is matched with the message length, a single Beidou terminal is selected for sending; if the capacity of the short message is not matched with the Beidou terminals in the current readiness linked list, message segmentation is carried out, the message segmentation principle is that the number of the Beidou terminals for message sending is the minimum, and the two mechanisms meet the requirement of fine capacity sending of the Beidou terminal short message.
The beneficial effects produced by adopting the invention are as follows: the method and the device solve the problem of dynamic selection of the transmitting terminal of the Beidou terminal cluster in a high-frequency and fine-capacity short message transmitting scene, ensure the balanced use of the Beidou terminals in the cluster, ensure the high-frequency and fine-capacity transmitting requirements of the Beidou short messages, and improve the utilization efficiency of channel resources of a Beidou system.
Drawings
Fig. 1 is a send wait linear linked list and a ready linear linked list of the present invention.
Detailed Description
The sending waiting linear linked list and the ready linear linked list formed by the Beidou terminals are non-continuous and non-sequential storage structures on a physical storage unit, and the logical sequence of data elements is realized through the link sequence of pointers in the linked list, so that nodes at any positions on the list can be allowed to be inserted or removed.
Therefore, by using the characteristic of the linear linked list, a brand-new high-frequency precise-capacity Beidou short message sending method is formed, and the method comprises the following steps:
A. building a Beidou terminal sending waiting linear linked list and a ready linear linked list;
the Beidou terminal in the sending waiting linear linked list is a terminal which does not acquire sending authority;
the Beidou terminals in the sending waiting linear chain table are sequentially sorted from big to small according to the weights, as shown in FIG. 1, the Beidou terminals in the sending waiting linear chain table are numbered I-m, the weights are PI-Pm, and the PI-Pm are sequentially arranged from big to small;
the Beidou terminal in the ready linear linked list is the terminal which has acquired the sending authority;
when the Beidou terminal is used specifically, the Beidou terminals in the ready linear linked list are sorted according to the time from last sending of the short message, the longer the time is, the earlier the sort is, and the more the Beidou terminals are reasonably utilized to the maximum extent, so that the use times of each Beidou terminal are balanced.
B. When a Beidou terminal in the sending waiting linear linked list acquires the sending authority, the terminal is moved from the sending waiting linear linked list to a ready linear linked list;
when short messages need to be sent, the Beidou terminal with the top ranking is obtained from the ready linked list and sent; as shown in fig. 1, the beidou terminal in the ready linear linked list is numbered 1-n, and the weight is P1-Pn, where P1 and Pn are the head and tail of the ready linear linked list;
C. when a short message needs to be sent, obtaining the Beidou terminal from the ready linked list for sending; if the ready linked list is empty, waiting; and the Beidou terminal which finishes sending the short message moves to a sending waiting linear linked list.
After the Beidou terminal sends the short message, the weight is set as an initial value and placed at a proper position in the sending waiting linear linked list. After each short message is sent, the Beidou terminal is removed from the ready linear linked list; then the Beidou terminal is sequentially compared with the weight of the Beidou terminal in the sending and waiting linear linked list according to the weight, and if the weight of the Beidou terminal is larger than the weight of the Beidou terminal in the current sending and waiting linear linked list, the eliminated Beidou terminal is inserted in front of the Beidou terminal in the current sending and waiting linear linked list; if the weight of the Beidou terminal is equal to that of the Beidou terminal in the current sending waiting linear linked list, continuing comparison until the Beidou terminal smaller than the weight is terminated, and inserting the removed Beidou terminal between the last Beidou terminal with the same weight and the Beidou terminal with the smaller weight; and if the weight of the removed Beidou terminal is greater than the weight of the Beidou terminal in the sending waiting linear linked list, inserting the removed Beidou terminal into the last sending waiting linear linked list.
The initial value of the weight P of each Beidou terminal is P =1/S, S is the emission frequency of the terminal, and the unit is second; the weight P changes along with time, P =1/T, T is the time of the terminal for obtaining the sending authority; and when T =0, the terminal is moved from the sending waiting linear linked list to the ready linear linked list. The weight value P is defined as that the weight value is continuously increased along with the time when the Beidou terminal does not reach the transmitting state, and when T =0, the weight value is infinite and is recorded as that the sending permission is obtained.
When a short message is actually sent, the capacity of the short message sent at this time is detected, Beidou terminals with proper sending capacity and message length are matched in a ready linear linked list according to the message capacity, if no Beidou terminal is proper, the short message is selected to be segmented, and the message segmentation principle is that the number of the Beidou terminals for sending the message is minimum. The invention has no requirement on the generation difference of the short message receiving end and no requirement on the receiving time interval of the short message receiving end, thereby mainly considering saving Beidou terminal resources, completing the short message transmission by the minimum number of Beidou terminals and improving the utilization efficiency of the Beidou system channel capacity resources to the maximum extent.
Claims (7)
1. A high-frequency fine-capacity Beidou short message sending method is characterized by comprising the following steps: the Beidou short message sending method comprises the following steps:
A. building a Beidou terminal sending waiting linear linked list and a ready linear linked list;
the Beidou terminal in the sending waiting linear linked list is a terminal which does not acquire sending authority;
the Beidou terminal in the ready linear linked list is the terminal which has acquired the sending authority;
B. when a Beidou terminal in the sending waiting linear linked list acquires the sending authority, the terminal is moved from the sending waiting linear linked list to a ready linear linked list;
C. when a short message needs to be sent, obtaining the Beidou terminal from the ready linked list for sending; if the ready linked list is empty, waiting; and the Beidou terminal which finishes sending the short message moves to a sending waiting linear linked list.
2. The high-frequency fine-capacity Beidou short message sending method according to claim 1, characterized by comprising the following steps: each Beidou terminal is provided with a weight P, the initial value of P is P =1/S, S is the emission frequency of the terminal, and the unit is second;
the weight P changes along with time, P =1/T, T is the time of the terminal for obtaining the sending authority; and when T =0, the terminal is moved from the sending waiting linear linked list to the ready linear linked list.
3. The high-frequency fine-capacity Beidou short message sending method according to claim 1, characterized by comprising the following steps: and sequentially sequencing the Beidou terminals in the sending and waiting linear linked list from large to small according to the weight.
4. The high-frequency fine-capacity Beidou short message sending method according to claim 1, characterized by comprising the following steps: the Beidou terminals in the ready linear linked list are sorted according to the time from the last sending of the short message, and the longer the time is, the earlier the sorting is; and when the short message needs to be sent, obtaining the Beidou terminal with the most front sequencing from the ready linked list and sending the Beidou terminal.
5. The high-frequency fine-capacity Beidou short message sending method according to claim 1, characterized by comprising the following steps: after the Beidou terminal sends the short message, the weight is set as an initial value and placed at a proper position in the sending waiting linear linked list.
6. The high-frequency fine-capacity Beidou short message sending method according to claim 1, characterized by comprising the following steps: and when the short message is sent, selecting a Beidou terminal with the sending capacity matched with the message length from the ready linear linked list.
7. The high-frequency fine-capacity Beidou short message sending method according to claim 1, characterized by comprising the following steps: when a short message is sent, if the message capacity is not matched with that of the Beidou terminal in the ready linear linked list, message segmentation is carried out; the principle of message segmentation is that the number of Beidou terminals for message sending is minimum.
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2021
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| CN204598329U (en) * | 2015-05-29 | 2015-08-26 | 中水银星科技（北京）有限公司 | Sensor network data gathering-device and system |
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