Multi-carrier-frequency and multi-time-slot transmission method for power 230M wireless private network

Abstract

The invention discloses a multi-carrier-frequency and multi-time-slot transmission method for an electric power 230M wireless private network, and belongs to the field of electric power communication. The method comprises the following steps: a terminal sends a CRAND request signaling to a base station, and the size of a data packet to be transmitted is indicated by using an ASD reserved bit in an original EPDT system; the base station allocates an idle carrier frequency and an idle time slot to the terminal according to the size of a to-be-transmitted data packet indicated in an ASD reservation bit in the CRAND request signaling and the current service channel occupation condition, and issues carrier frequency and time slot information to the terminal through a PDGRANT signaling and a CGAP signaling; and the terminal splits a data packet to be transmitted into small packets, and uploads the small packets in parallel on the allocated frequency points and time slots. According to the invention, full utilization of carrier frequency resources and time slot resources can be realized, a low-efficiency redundant call establishment process in a power system is avoided, and the power data transmission rate is effectively improved.

Description

Technical Field

[0001] The present invention relates to the field of electric power communications, and in particular to a multi-carrier frequency and multi-time slot transmission method for an electric power 230M wireless private network. Background Art

[0002] With the construction and development of smart energy networks and information-based power systems, many electricity information transmission scenarios in the power industry, such as distributed renewable energy, distribution automation, and power load control, are facing a surge in the amount of information transmitted on the user side and urgent response processing time. This puts higher demands on the power communication system to quickly upload and efficiently process data.

[0003] Existing single-carrier frequency, dual-time-slot transmission methods struggle to meet the demands of large-scale, real-time data transmission in current power systems. Particularly in 230M wireless private power networks, bandwidth limitations and transmission rate bottlenecks make traditional transmission methods inadequate for diverse services such as massive amounts of smart meter information, distribution automation control data, and distributed power generation monitoring. Therefore, research on multi-carrier frequency, multi-time-slot transmission methods to improve the transmission efficiency and capacity of 230M wireless private power networks has become a key development direction for smart grid communication technology. Summary of the Invention

[0004] The present invention aims to overcome the shortcomings of the prior art by providing a multi-carrier frequency and multi-time slot transmission method for a 230 Mbps wireless private network. This method fully utilizes carrier frequency and time slot resources, avoids inefficient and redundant call establishment processes in power systems, and effectively improves the power data transmission rate.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A multi-carrier frequency and multi-time slot transmission method for a 230M electric power wireless private network comprises the following steps:

[0007] S1: The terminal sends a C_RAND request signaling to the base station. In the C_RAND request signaling, the ASD reserved bit in the original EPDT system is used to indicate the size of the data packet to be transmitted, thereby uploading the capacity information of the data packet to be transmitted to the base station;

[0008] S2: After receiving the C_RAND request signaling sent by the terminal, the base station allocates an idle carrier frequency and an idle time slot to the terminal according to the size of the data packet to be transmitted indicated in the ASD reserved bit in the C_RAND request signaling and the current traffic channel occupancy, and sends the carrier frequency and time slot information to the terminal through PD_GRANT signaling and CG_AP signaling;

[0009] In S3, the terminal splits the data packet to be transmitted into small packets and uploads them in parallel on the allocated frequency and time slot.

[0010] Furthermore, in step S2, a new FMOD information unit is added to the PD_GRANT signaling to indicate the single-frequency or multi-frequency mode currently adopted by the system;

[0011] When the FMOD information unit is configured as a single frequency mode, the CHAN information unit in the PD_GRANT signaling is used to indicate the carrier frequency that the terminal can use, the CHSP information unit in the PD_GRANT signaling is used to indicate the service channel bandwidth of the terminal, and the LCN information unit in the PD_GRANT signaling is used to indicate the idle time slots that the terminal can use;

[0012] When the FMOD information unit is configured to multi-frequency mode, PD_GRANT signaling is applied to configure the frequency, bandwidth and time slot parameters of channel 0, and CG_AP signaling is applied to complete the frequency, bandwidth and time slot parameters required for supplementary channels 1 to 3; specifically, the multi-carrier mode is enabled when the CHT unit in the CG_AP signaling is configured to 11112; when the corresponding bit in FMOD1 to FMOD3 is configured to 1, it indicates that the supplementary channel is enabled. At this time, the frequency, bandwidth and time slot required by the terminal are configured according to whether the corresponding bits in the CHAN1 to CHAN3, CHSP1 to CHSP3, and LCN1 to LCN3 information units are set to 1.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] When the power terminal or base station has a large amount of data transmission demand, the method of the present invention will allocate multiple carrier frequencies and multiple time slots to the terminal or base station as parallel transmission service channels according to the service channel occupancy and idle frequency usage, so as to fully utilize the carrier frequency resources and time slot resources, avoid inefficient and redundant call establishment processes in the power system, and effectively improve the power data transmission rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A flowchart of a multi-carrier frequency and multi-time slot transmission method for a 230M wireless private power network provided by an embodiment of the present invention;

[0016] Figure 2 A schematic diagram of the process of establishing and releasing a data transmission channel between a base station and a terminal provided in an embodiment of the present invention;

[0017] Figure 3 A schematic diagram of the process of establishing and releasing a data transmission channel between terminals provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below with reference to the accompanying drawings and examples. The examples are provided for illustrative purposes only and are not to be construed as limiting the present invention. The accompanying drawings are provided for reference and illustration purposes only and do not constitute a limitation on the scope of the present invention. Many modifications may be made to the present invention without departing from the spirit and scope of the present invention.

[0019] A multi-carrier frequency and multi-time slot transmission method for power 230M wireless private network, such as Figure 1 As shown, the following steps are included:

[0020] S1. The terminal sends a C_RAND request signaling to the base station. The C_RAND request signaling includes capacity information of the data packet to be transmitted.

[0021] S2. The base station allocates the corresponding idle carrier frequency and idle time slot to the terminal according to the size of the data packet to be transmitted and the current traffic channel occupancy, and sends the configuration through PD_GRANT signaling.

[0022] S3. The terminal splits the data packet to be transmitted into several small packets and uploads them in parallel on the allocated frequency and time slot.

[0023] The method first sends a data transmission C_RAND request signaling from the user terminal to the base station. This signaling is based on the modified and optimized C_RAND request signaling in the Electric Power Professional Data Transmission (EPDT) communication system. The C_RAND request signaling in the EPDT system is shown in Table 1:

[0024] Table 1 Contents of C_RAND request signaling

[0025]

[0026]

[0027] Based on the C_RAND request signaling content in the EPDT system, the ASD reserved bit is used to indicate the size of the data packet to be transmitted. The optimized C_RAND request signaling content is shown in Table 2:

[0028] Table 2 Contents of optimized C_RAND request signaling

[0029]

[0030]

[0031] After receiving the C_RAND request signaling sent by the terminal, the base station allocates the corresponding idle carrier frequency and idle time slot to the terminal according to the size of the data packet to be transmitted and the current traffic channel occupancy indicated in the ASD unit of the C_RAND request signaling, and sends the configuration through the PD_GRANT signaling. The PD_GRANT signaling of the original EPDT system is shown in Table 3:

[0032] Table 3 PD_GRANT signaling content of the original EPDT system

[0033]

[0034]

[0035] This signaling supports only single-frequency single / double-slot modes, based on the carrier frequency and allocated time slots indicated by the CHAN and LCN units. If the data packet to be sent is large, the EPDT system must repeatedly establish connections, wasting resources and limiting the data transmission rate.

[0036] Based on the PD_GRANT signaling of the EPDT system, this method adds a new FMOD information unit to indicate whether the current system adopts a single-frequency point or a multi-frequency point mode. If FMOD is configured in single-frequency point mode, the CHAN information unit in the PD_GRANT signaling is used to indicate the carrier frequency point that the terminal can use, the CHSP information unit indicates the service channel bandwidth of the terminal, and the LCN indicates the idle time slot that the terminal can use. If FMOD is configured in multi-frequency point mode, in addition to applying the channel configuration parameters in the PD_GRANT signaling, it is also necessary to cooperate with the channel supplementary parameter CG_AP signaling to complete the configuration of the frequency point and time slot required by the terminal. The CG_AP part of the signaling is shown in Table 4:

[0037] Table 4 Contents of CG_AP signaling

[0038]

[0039]

[0040] Table 5

[0041]

[0042]

[0043] In Table 4, the multi-carrier mode is enabled when the CHT unit is configured as 11112. When FMOD1 to FMOD3 are configured as 1, it indicates that the supplemental channel is enabled. At this time, the frequency, bandwidth, and time slot required by the terminal are configured according to the following CHAN1 to CHAN3, CHSP1 to CHSP3, and LCN1 to LCN3 information units.

[0044] In a possible implementation, the method can be applied to the communication between the power user terminal and the base station, and the process is as follows: Figure 2 As shown, the description is as follows:

[0045] When a terminal (TE) has a large data transmission demand, it sends a C_RAND request signaling to the base station (BS). This signaling uses the ASD reserved bit to indicate the size of the data packet to be transmitted. SK is used to indicate whether the service is currently unicast or multicast. SADDR indicates the calling address or gateway number, and TADDR indicates the called party's personal number or gateway number. Upon receiving the C_RAND request signaling from the terminal, the base station (BS) allocates the corresponding idle carrier frequency and idle timeslot to the terminal based on the size of the data packet to be transmitted indicated in the ASD element of the C_RAND request signaling and the current traffic channel occupancy. This allocation is then forwarded via PD_GRANT and CG_AP signaling. Once the uplink data transmission service channel is established, P_PROTECT signaling is used to transmit service channel maintenance signaling. The terminal splits the data packet to be transmitted into several smaller packets and uploads them in parallel on the allocated frequencies and timeslots. After the uplink data transmission is completed, the base station (BS) sends a P_CLEAR signaling to release the current traffic channel.

[0046] When a base station (BS) has a large data transmission demand, it sends a C_AHOY unicast data transmission request signaling to the terminal (TE). SK indicates whether the service is currently unicast or multicast. SADDR indicates the calling address or gateway number, i.e., the current base station (BS), and TADDR indicates the called party's personal number or gateway number, i.e., the terminal (TE) to be connected. Upon receiving the C_AHOY unicast data transmission request signaling, the TE replies with a C_ACKU signaling ...

[0047] In the PD_GRANT signaling, the FMOD information element is used to indicate whether the current system uses single-frequency or multi-frequency mode. If FMOD is configured in single-frequency mode, the CHAN information element is used to indicate the carrier frequencies available to the terminal, the CHSP information element indicates the service channel bandwidth of the terminal, and the LCN indicates the idle time slots available to the terminal. If FMOD is configured in multi-frequency mode, in addition to applying the channel configuration parameters in the PD_GRANT signaling, the channel supplementary parameter CG_AP signaling is also required to complete the configuration of the frequency and time slot required by the terminal.

[0048] Multi-carrier mode is enabled when the CHT unit of CG_AP signaling is configured as 11112. When FMOD1 to FMOD3 are configured as 1, it indicates that the supplementary channel is enabled. At this time, the frequency, bandwidth, and time slot required by the terminal are configured according to the following information units: CHAN1 to CHAN3, CHSP1 to CHSP3, and LCN1 to LCN3.

[0049] In another possible implementation, the method can be applied to communication between power user terminals, and the process is as follows: Figure 3 As shown, the description is as follows:

[0050] Terminal device TE1 sends a C_RAND unicast data request signaling to the base station BS. If terminal device TE1 does not have permission, the base station returns a C_NACKD signaling to terminal TE1 to reject the connection. If terminal device TE1 has the corresponding permission, the base station BS sends a C_AHOY signaling to terminal device TE2 to check the device status of terminal TE2. Terminal device TE2 returns a C_ACKU signaling to the base station to inform the base station whether it can communicate normally. If terminal TE2 can communicate normally, the base station BS will allocate corresponding idle frequency points and time slots to terminals TE1 and TE2 based on the traffic channel occupancy. At this time, terminal TE1 will split the data packet to be transmitted into several small packets and complete parallel transmission on the allocated traffic channel. The base station will use these several data packets as a transit station to complete data transmission through the traffic channel allocated to TE2. After the data transmission is completed, the base station will send a P_CLEAR signaling to both terminal devices TE1 and TE2 to release the channel operation.

[0051] In the PD_GRANT signaling, the FMOD information element is used to indicate whether the current system uses single-frequency or multi-frequency mode. If FMOD is configured in single-frequency mode, the CHAN information element is used to indicate the carrier frequencies available to the terminal, the CHSP information element indicates the service channel bandwidth of the terminal, and the LCN indicates the idle time slots available to the terminal. If FMOD is configured in multi-frequency mode, in addition to applying the channel configuration parameters in the PD_GRANT signaling, the channel supplementary parameter CG_AP signaling is also required to complete the configuration of the frequency and time slot required by the terminal.

[0052] Multi-carrier mode is enabled when the CHT unit of CG_AP signaling is configured as 11112. When FMOD1 to FMOD3 are configured as 1, it indicates that the supplementary channel is enabled. At this time, the frequency, bandwidth, and time slot required by the terminal are configured according to the following information units: CHAN1 to CHAN3, CHSP1 to CHSP3, and LCN1 to LCN3.

[0053] In summary, the present invention can allocate multiple carrier frequencies and multiple time slots as parallel transmission service channels for terminals or base stations based on the occupancy of service channels and the use of idle frequencies, thereby fully utilizing carrier frequency resources and time slot resources, avoiding inefficient and redundant call establishment processes in the power system, and effectively improving the power data transmission rate.

Claims

1. A multi-carrier frequency and multi-time slot transmission method for a 230M power wireless private network, characterized in that: The following steps are involved: S1: The terminal sends a C_RAND request signaling to the base station. In the C_RAND request signaling, the ASD reserved bit in the original EPDT system is used to indicate the size of the data packet to be transmitted, thereby uploading the capacity information of the data packet to be transmitted to the base station; S2: After receiving the C_RAND request signaling sent by the terminal, the base station allocates an idle carrier frequency and an idle time slot to the terminal according to the size of the data packet to be transmitted indicated in the ASD reserved bit in the C_RAND request signaling and the current traffic channel occupancy, and sends the carrier frequency and time slot information to the terminal through PD_GRANT signaling and CG_AP signaling; In S3, the terminal splits the data packet to be transmitted into small packets and uploads them in parallel on the allocated frequency and time slot.

2. The multi-carrier frequency and multi-time slot transmission method for a 230M wireless private power network according to claim 1, characterized in that: In step S2, a new FMOD information unit is added to the PD_GRANT signaling to indicate whether the current system uses a single-frequency or multi-frequency mode; When the FMOD information unit is configured as a single frequency mode, the CHAN information unit in the PD_GRANT signaling is used to indicate the carrier frequency that the terminal can use, the CHSP information unit in the PD_GRANT signaling is used to indicate the service channel bandwidth of the terminal, and the LCN information unit in the PD_GRANT signaling is used to indicate the idle time slots that the terminal can use; When the FMOD information unit is configured to multi-frequency mode, PD_GRANT signaling is applied to configure the frequency, bandwidth and time slot parameters of channel 0, and CG_AP signaling is applied to complete the frequency, bandwidth and time slot parameters required for supplementary channels 1 to 3; specifically, the multi-carrier mode is enabled when the CHT unit in the CG_AP signaling is configured to 11112; when the corresponding bit in FMOD1 to FMOD3 is configured to 1, it indicates that the supplementary channel is enabled. At this time, the frequency, bandwidth and time slot required by the terminal are configured according to whether the corresponding bits in the CHAN1 to CHAN3, CHSP1 to CHSP3, and LCN1 to LCN3 information units are set to 1.

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