CN111182472B - Method for sending broadcast data in Internet of things - Google Patents
Method for sending broadcast data in Internet of things Download PDFInfo
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- CN111182472B CN111182472B CN201911394822.1A CN201911394822A CN111182472B CN 111182472 B CN111182472 B CN 111182472B CN 201911394822 A CN201911394822 A CN 201911394822A CN 111182472 B CN111182472 B CN 111182472B
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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
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
Abstract
The invention is suitable for the technical field of wireless communication, and provides a method for sending broadcast data in the Internet of things, which comprises the following steps: s1, the base station divides the broadcast information and repeatedly sends the divided broadcast information for X times; s2, the first terminal receives the broadcast information sent by the base station and decodes the broadcast information, and the first terminal feeds back the information according to the broadcast information; s3, the second terminal successfully receives the first feedback information on the first feedback resource, and the second terminal and the base station use the same resource to jointly send the second broadcast information; s4, judging whether the first terminal tries to receive the second broadcast information successfully; s5, the base station increases the time frequency resource used for sending the second broadcast information subsequently and updates the first broadcast information according to the second feedback information; s6, the base station sends the auxiliary information to the second terminal, and the second terminal and the base station are required to send the second broadcast information together using the same resource. The frequency spectrum efficiency of the Internet of things system is improved, and the control overhead is reduced.
Description
Technical Field
The invention belongs to the technical field of wireless communication, and particularly relates to a method for sending broadcast data in the Internet of things.
Background
The 5G can meet diversified business requirements of people in various areas such as residence, work, leisure and traffic, and can provide extremely-sophisticated business experience such as ultra-high-definition video, virtual reality, augmented reality, cloud desktops and online games for users even in scenes with ultra-high traffic density, ultra-high connection number density and ultra-high mobility characteristics such as dense residential areas, offices, stadiums, outdoor gatherings, subways, expressways, high-speed rails and wide area coverage. Meanwhile, 5G can permeate into the fields of the Internet of things and various industries, is deeply integrated with industrial facilities, medical instruments, vehicles and the like, effectively meets the diversified business requirements of the vertical industries such as industry, medical treatment, transportation and the like, and realizes real 'everything interconnection'.
The 5G application scenarios can be divided into two broad categories, namely Mobile Broadband (MBB) and Internet of Things (IoT). Among these, the main technical requirements for mobile broadband access are high capacity, providing high data rates to meet the ever-increasing demand for data services. The internet of things is mainly driven by the requirement of Machine Communication (MTC), and can be further divided into two types, including low-speed Mass Machine Communication (MMC) and low-latency high-reliability Machine Communication. For the low-speed mass machine communication, mass nodes are accessed at a low speed, the transmitted data packets are usually small, the interval time is relatively long, and the cost and the power consumption of the nodes are usually low; for machine communication with low time delay and high reliability, the method is mainly used for machine communication with higher requirements on instantaneity and reliability, such as real-time alarm, real-time monitoring and the like.
In a fifth generation mobile communication system, a scene needing to be researched is the problem of effective and reliable transmission of broadcast data in the internet of things, and a common solution mainly depends on repeated transmission of data for many times, so that the spectral efficiency of the system is low, how to increase the transmission spectral efficiency of the broadcast data of the internet of things system is an important problem to be solved urgently by the internet of things system.
Disclosure of Invention
The invention aims to provide a method for sending broadcast data in the Internet of things, and aims to solve the problem of low transmission spectrum efficiency of the broadcast data in the existing Internet of things.
The invention is realized in such a way that a method for sending broadcast data in the Internet of things comprises the following steps:
s1, dividing the broadcast information to be released into first broadcast information and second broadcast information by the base station and repeatedly sending the first broadcast information for X times;
s2, after receiving Y times of the first broadcast information sent by the base station and successfully decoding the first broadcast information, a first terminal that does not perform uplink synchronization determines, according to Y and the first feedback resource pool configuration information, a first feedback resource used by the first terminal to send first feedback information to the base station, and repeatedly sends Y times of the first feedback information through the first feedback resource;
s3, when the power of the second terminal is greater than 80% and the second terminal is in a connected state, the first feedback information is successfully received on the first feedback resource, and the second terminal and the base station use the same resource to jointly send the second broadcast information;
s4, determining whether the first terminal attempts to receive the second broadcast information successfully, if the reception is successful, the first terminal sends an uplink random access channel based on the second broadcast information, and if the reception is unsuccessful, the first terminal sends second feedback information that the reception is unsuccessful on the second feedback resource;
s5, the base station increases time-frequency resources used for subsequently sending the second broadcast information and updates the first broadcast information according to the successfully received second feedback information;
s6, the base station sends the auxiliary information to the second terminal, and the second terminal and the base station can send the second broadcast information together using the same resource when the power of the second terminal is required to be greater than 90%;
wherein X is an integer of 32 or more; y is a positive integer of 0.75X or more and X or less.
The further technical scheme of the invention is as follows: the first broadcast information at least comprises configuration information of the second broadcast information and configuration information of a first feedback resource pool, and the second broadcast information at least comprises configuration information of a random access channel, configuration information of second feedback resources and a time-frequency resource position used by the second broadcast information.
The further technical scheme of the invention is as follows: the first feedback resource pool comprises 0.25X candidate first feedback resources, and the repeated sending times of the first feedback information supported by the candidate first feedback resources are (0.75X), (0.75X + 1), (0.75X + 2), … …, (X-2), (X-1) and X, respectively.
The further technical scheme of the invention is as follows: the second feedback resource configuration information only includes one second feedback resource, and the number of times of repeated sending of the second feedback information supported by the second feedback resource is X.
The further technical scheme of the invention is as follows: and if the signal strength of the first feedback information successfully received by the second terminal is S and the maximum transmission power of the second terminal is P, the power of the second broadcast information sent by the second terminal is (P-S).
The further technical scheme of the invention is as follows: if the second terminal needs to receive other data information sent to it by the base station in a partial time range in which the base station sends the second broadcast information, the second terminal does not need to send the second broadcast information in the partial time range.
The further technical scheme of the invention is as follows: and if the signal strength of the first feedback information successfully received by the base station is less than 0dB, the base station can only provide service for a third terminal within the sending time range of the second broadcast information, wherein the third terminal is a terminal with channel quality information fed back to the base station being greater than 10 dB.
The further technical scheme of the invention is as follows: and if the signal strength of the first feedback information successfully received by the base station is less than-5 dB, the base station can only send the second broadcast information within the sending time range of the second broadcast information.
The further technical scheme of the invention is as follows: and the strength of the downlink synchronous signal sent by the base station and received by the second terminal is less than or equal to 5 dB.
The further technical scheme of the invention is as follows: and when the signal strength of the first feedback information received by the second terminal is S, the S is more than or equal to 10 dB.
The invention has the beneficial effects that: the method solves the problem of poor spectrum efficiency of broadcast data in the existing Internet of things, improves the spectrum efficiency of the Internet of things system, and reduces the control overhead.
Drawings
Fig. 1 is a flowchart of a method for sending broadcast data in the internet of things according to an embodiment of the present invention.
Detailed Description
As shown in fig. 1, the flow chart of the method for sending broadcast data in the internet of things provided by the present invention is detailed as follows:
step S1, the base station divides the broadcast information to be released into the first broadcast information and the second broadcast information and repeatedly sends the first broadcast information for X times; the base station divides the broadcast information into first broadcast information and second broadcast information, wherein the first broadcast information at least comprises configuration information of the second broadcast information and configuration information of a first feedback resource pool, and the second broadcast information at least comprises configuration information of a random access channel and configuration information of a second feedback resource; and the base station repeatedly transmits the first broadcast information for X times, wherein X is an integer greater than or equal to 32.
Step S2, after receiving Y times of the first broadcast information sent by the base station and successfully decoding the first broadcast information, a first terminal that does not perform uplink synchronization determines, according to Y and the first feedback resource pool configuration information, a first feedback resource used by the first terminal to send first feedback information to the base station, and the first terminal repeatedly sends the first feedback information Y times through the first feedback resource; wherein Y is a positive integer of not less than (0.75X) and not more than X.
Step S3, the second terminal in the connected state with a quantity greater than 80% successfully receives the first feedback information on the first feedback resource, and the second terminal and the base station use the same resource to jointly send the second broadcast information.
Step S4, the first terminal tries to receive the second broadcast information, if the reception is successful, the first terminal sends the uplink random access channel based on the second broadcast information, and if the reception is unsuccessful, the first terminal sends the second feedback information that the reception is unsuccessful on the second feedback resource.
Step S5, after the base station successfully receives the second feedback information, increasing the time-frequency resources used for subsequently sending the second broadcast information, and updating the first broadcast information.
Step S6, the station sends the auxiliary information to the second terminal, and the second terminal and the base station can use the same resource to send the second broadcast information when the power of the second terminal is required to be greater than 90%.
Example 1
The base station divides the broadcast information into first broadcast information and second broadcast information, wherein the first broadcast information at least comprises configuration information of the second broadcast information and configuration information of a first feedback resource pool, and the second broadcast information at least comprises configuration information of a random access channel and configuration information of a second feedback resource.
The base station repeatedly transmits the first broadcast information X times, where X is an integer greater than or equal to 32, which has the advantage of ensuring that the terminal can successfully receive the first broadcast information with a very high probability by repeatedly transmitting the information a plurality of times.
After receiving the first broadcast information sent by the base station for Y times, the first terminal which does not perform uplink synchronization successfully decodes the first broadcast information, determines, according to the Y and the configuration information of the first feedback resource pool, a first feedback resource used by the first terminal to send the first feedback information to the base station, and repeatedly sends the first feedback information for Y times through the first feedback resource, wherein Y is a positive integer which is greater than or equal to (0.75X) and less than or equal to X.
The second terminal with the electric quantity being more than 80% and in the connection state successfully receives the first feedback information on the first feedback resource, and the second terminal and the base station use the same resource to jointly send the second broadcast information.
The first terminal tries to receive the second broadcast information, if the reception is successful, the first terminal sends an uplink random access channel based on the second broadcast information, and if the reception is failed, the first terminal sends the second feedback information of which the reception is failed on the second feedback resource.
After the base station successfully receives the second feedback information, increasing time-frequency resources used for subsequently sending the second broadcast information, and updating the first broadcast information.
The base station sends the auxiliary information to the second terminal, and the base station can send the second broadcast information together by using the same resource when the electric quantity of the second terminal is required to be more than 90%, so that the base station can actively increase the resource used for sending the second broadcast information after finding that the quality of a wireless channel has a problem, and further the second terminal is allowed to further reduce the probability of sending the second broadcast information by self assistance, and the standby time of the second terminal is prolonged.
Example 2
On the basis of embodiment 1, the configuration information of the second broadcast information at least includes a time-frequency resource location used for sending the second broadcast information.
Example 3
Based on embodiment 1, the first feedback resource pool includes (0.25 × X) candidate first feedback resources, and the number of times of repeated transmission of the first feedback information supported by the candidate first feedback resources is (0.75 × X), (0.75 × X + 1), (0.75 × X + 2), … …, (X-2), (X-1), and X, respectively. The reason for this is that different terminals need to decode the first broadcast information with different times due to different wireless channel conditions, and when the times that the terminals need to decode the first broadcast information with success exceed a certain threshold, the terminal is in a poor channel environment, and when receiving the second broadcast information, the terminal has a high probability of being unable to receive, and needs to notify the base station of the information, and the base station performs subsequent processing according to the information.
Example 4
On the basis of embodiment 1, the second feedback resource configuration information only includes one second feedback resource, and the number of times of repeated sending of the second feedback information supported by the second feedback resource is X. This has the advantage that if the terminal fails to receive the second broadcast information successfully, which indicates that there is a problem in network planning of the communication system, the plurality of terminals that failed to receive the second feedback information can share the second feedback resource, and the content transmitted on the second feedback resource is repeatedly transmitted for a plurality of times to ensure successful reception by the base station.
Example 5
On the basis of embodiment 1, the strength of the downlink synchronization signal received by the second terminal and sent by the base station is less than or equal to 5 dB. The reason for this is that the probability that the second broadcast information reception failure exists in the users at the edge of the general cell is far greater than that of the users smaller than the central user, so that the second terminal, which is close to the edge of the cell and has already accessed the system and is in a connected state, assists the base station to send the second broadcast information to the first terminal, which is smaller than the edge and has not accessed the system, so that the transmission efficiency of the second broadcast information and the spectrum efficiency of the whole system can be effectively improved.
Example 6
On the basis of embodiment 5, if the signal strength of the first feedback information successfully received by the second terminal is S, and the maximum transmission power of the second terminal is P, the power of the second terminal for transmitting the second broadcast information is (P-S). This has the advantage of minimizing the power consumption of the second terminal and increasing the standby time of the second terminal.
Example 7
On the basis of embodiment 6, when the signal strength of the first feedback information received by the second terminal is S, S should be greater than or equal to 10 dB. The reason for this is that it is desirable that the distance between the second terminal and the first terminal is as close as possible, thereby reducing power consumption of the second terminal and increasing standby time of the second terminal.
Example 8
On the basis of embodiment 1, if the second terminal needs to receive other data information sent to it by the base station in a partial time range in which the base station sends the second broadcast information, the second terminal does not need to send the second broadcast information in the partial time range. This has the advantage that the quality of network service of the system to the second terminal is guaranteed as much as possible.
Example 9
On the basis of embodiment 1, if the signal strength of the first feedback information successfully received by the base station is less than 0dB, the base station can only provide service to a third terminal within the transmission time range of the second broadcast information, where the third terminal is a terminal whose channel quality information fed back to the base station is greater than 10 dB. The reason for this is that the wireless channel environment of the first terminal and the base station is poor, the base station needs to allocate more power to the resource for sending the second broadcast information to improve the probability that the first terminal successfully obtains the second broadcast information, and the available power on other resources in the same time period is less, so that the base station can only provide service to a third terminal with good channel quality close to the base station.
Example 10
On the basis of embodiment 1, if the signal strength of the first feedback information successfully received by the base station is less than-5 dB, the base station may only transmit the second broadcast information within the transmission time range of the second broadcast information. The reason for this is that the wireless channel environment between the first terminal and the base station is very poor, and the base station needs to allocate all power to the resource for transmitting the second broadcast information to improve the probability of successfully acquiring the second broadcast information by the first terminal.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The method for sending the broadcast data in the Internet of things is characterized by comprising the following steps:
s1, dividing the broadcast information to be released into first broadcast information and second broadcast information by the base station and repeatedly sending the first broadcast information for X times;
s2, after receiving the first broadcast information sent by the base station for Y times and successfully decoding the first broadcast information, a first terminal which does not perform uplink synchronization determines a first feedback resource used by the first terminal to send the first feedback information to the base station according to Y and first feedback resource pool configuration information, and repeatedly sends the first feedback information for Y times through the first feedback resource;
s3, when the power of the second terminal is greater than 80% and the second terminal is in a connected state, the first feedback information is successfully received on the first feedback resource, and the second terminal and the base station use the same resource to jointly send the second broadcast information;
s4, determining whether the first terminal attempts to receive the second broadcast information successfully, if the reception is successful, the first terminal sends the random access information using an uplink random access channel based on the second broadcast information, and if the reception is unsuccessful, the first terminal sends the second feedback information that the reception is unsuccessful on the second feedback resource;
s5, the base station increases time-frequency resources used for subsequently sending the second broadcast information and updates the first broadcast information according to the successfully received second feedback information;
s6, the base station sends the auxiliary information to the second terminal, and the second terminal and the base station can send the second broadcast information together using the same resource when the power of the second terminal is required to be greater than 90%;
wherein X is an integer of 32 or more; y is a positive integer of 0.75X or more and X or less.
2. The method for sending broadcast data in the internet of things according to claim 1, wherein the first broadcast information at least includes configuration information of the second broadcast information and configuration information of a first feedback resource pool, and the second broadcast information at least includes configuration information of a random access channel, configuration information of a second feedback resource, and a time-frequency resource location used by the second broadcast information.
3. The method for sending broadcast data in the internet of things according to claim 2, wherein the first feedback resource pool includes 0.25 × X candidate first feedback resources, and the number of times of repeated sending of the first feedback information supported by the candidate first feedback resources is (0.75 × X), (0.75 × X + 1), (0.75 × X + 2), … …, (X-2), (X-1), and X, respectively.
4. The method for sending broadcast data in the internet of things according to claim 3, wherein the second feedback resource configuration information only includes one second feedback resource, and the number of times of the repeated sending of the second feedback information supported by the second feedback resource is X.
5. The method for sending broadcast data in the internet of things according to claim 4, wherein the signal strength of the first feedback information successfully received by the second terminal is S, and the maximum transmission power of the second terminal is P, then the power of the second terminal sending the second broadcast information is (P-S).
6. The method for sending broadcast data in the internet of things as claimed in claim 5, wherein if the second terminal needs to receive other data information sent to it by the base station in a partial time range in which the base station needs to send the second broadcast information, the second terminal does not need to send the second broadcast information in the partial time range.
7. The method for sending broadcast data in the internet of things according to claim 6, wherein if the signal strength of the first feedback information successfully received by the base station is less than 0dB, the base station can only provide service to a third terminal within the sending time range of the second broadcast information, wherein the third terminal is a terminal whose channel quality information fed back to the base station is greater than 10 dB.
8. The method for sending broadcast data in the internet of things as claimed in claim 7, wherein if the signal strength of the first feedback information successfully received by the base station is less than-5 dB, the base station can only send the second broadcast information within the sending time range of the second broadcast information.
9. The method for sending the broadcast data in the internet of things according to claim 8, wherein the strength of the downlink synchronization signal sent by the base station and received by the second terminal is less than or equal to 5 dB.
10. The method for sending broadcast data in the internet of things as claimed in claim 9, wherein when the signal strength of the first feedback information received by the second terminal is S, S should be greater than or equal to 10 dB.
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