CN114900274A - Method, device and storage medium for coordinated communication of multiple carrier networks in same station area - Google Patents
Method, device and storage medium for coordinated communication of multiple carrier networks in same station area Download PDFInfo
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- CN114900274A CN114900274A CN202210420718.0A CN202210420718A CN114900274A CN 114900274 A CN114900274 A CN 114900274A CN 202210420718 A CN202210420718 A CN 202210420718A CN 114900274 A CN114900274 A CN 114900274A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signaling for the administration of the divided path
- H04L5/0092—Indication of how the channel is divided
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The coordinated communication method of a plurality of carrier networks in the same station area comprises the following steps: CCO of each carrier network in the same region sends a network coordination frame, and the content of the network coordination frame comprises the time slot lengths of an A phase, a B phase and a C phase in the network; carrying out bandwidth coordination on each carrier network in the same region; after coordination is completed, the CCO of each carrier network divides a beacon time slot zone in one beacon period into an A phase beacon time slot zone, a B phase beacon time slot zone and a C phase beacon time slot zone according to a network coordination frame, divides a CSMA time slot zone in one beacon period into a three-phase backoff time slot zone and a three-phase backoff time slot zone according to a beacon signal, and nodes on each phase back off in time slots corresponding to the three-phase backoff time slot zone and send signals in time slots corresponding to the three-phase backoff time slot zone. The invention can reduce the mutual interference between the beacon signals and the non-beacon signals which are simultaneously transmitted by the adjacent subnets, and realize more efficient cooperative communication of multiple subnets.
Description
Technical Field
The present invention belongs to the technical field of broadband carrier communication, and particularly relates to a method, an apparatus and a storage medium for coordinated communication of multiple broadband carrier networks in the same distribution area.
Background
Carrier communication is a communication technology for signal transmission using a power line as a channel, and has been widely used in power systems by virtue of close connection with the power line. In some usage scenarios, for example, the number of communication nodes in a cell is large and exceeds the upper limit of the node capacity of 1 carrier subnet, or different power grid management departments install carrier subnets with different functions and purposes, which may cause the situation that a plurality of carrier subnets operate in parallel in some cells. The nodes of these sub-networks use the same power line communication channel for signal transmission and reception, and a serious mutual interference problem occurs. Therefore, a coordinated communication mechanism with multiple subnetworks coexisting is established in the broadband carrier communication standard, and according to the coordinated communication mechanism, a master node (CCO) of a carrier subnet transmits an internetwork coordination frame in a CSMA (Carrier sense multiple access) time slot region in a period less than or equal to 1 second, and the internetwork coordination frame is used for coordinating adjustment of different networks when the same network identifier is used and coordinating bandwidth in a beacon period. As shown in fig. 1, the bandwidth coordination may stagger the beacon slots of different networks in order, ensure that the beacon slots of different subnets do not collide, and ensure the periodicity of beacon transmission. Although the multi-subnet coordination mechanism in the existing carrier communication standard can avoid the collision between beacon signals of different subnets, the multi-subnet coordination mechanism is troubled by the problem of hidden terminals, the transmission process of the beacon signal of each subnet still has a great risk, and when the network service load level is higher, the collision probability of non-beacon signals of other subnets to the beacon signal is increased, so that the transmission effect of the network beacon signal is deteriorated, and even the network route is interrupted.
The time slot distribution of the two subnets after the bandwidth coordination is as shown in fig. 1, and as shown in fig. 2, in the two subnets, the CCO of the subnet 1 performs the hop-by-hop relay transmission and the whole network coverage process of the beacon signal in the beacon time slot region of its own network based on the network tree topology structure. Suppose that at a certain time, the CCO of subnet 1 transmits a central beacon signal, denoted as signal 1, to 4 neighbor nodes (PCO1, PCO2, STA1, STA 2); meanwhile, node X of sub-network 2 generates a requirement for transmitting traffic to node Y of the same sub-network, and since the CSMA channel listening process of node X cannot listen to the transmitted signal of CCO of sub-network 1 except for 1 hop, it may also transmit a signal to node Y during the period that signal 1 occupies the power line channel, which is denoted as signal 2, and the interference range of signal 2 covers nodes PCO1, PCO2 and STA1 of sub-network 1, thereby causing the failure of receiving the central beacon signal of these three nodes. Since there is no reception confirmation mechanism in the transmission process of the beacon signal, the CCO of the subnet 1 cannot know the reception result, and does not perform signal retransmission. In this case, the proxy nodes PCO1 and PCO2 of the subnet 1 cannot relay the beacon signal, so that all nodes in the subsequent hierarchy of the two proxy nodes in the network tree topology, including the nodes STA3 to STA7 and the node PCO3, cannot receive the beacon signal of the superframe. Since the beacon signal carries key information of a superframe structure of a subnet, and the network node can evaluate and maintain the tree topology structure of the network according to the signal receiving effect, the high reliability of the signal multi-hop transmission process is the basis for maintaining the topology structure of the whole carrier network and the signal ordered channel access. When multiple subnetworks coexist, if the traffic load level of one subnet is higher, the signal transmission frequency of the network node in the CSMA timeslot area is increased, the signal collision probability is increased, the multi-hop transmission effect of the beacon signal of the subnet is seriously deteriorated, the network operation of other subnetworks is unstable, and even the routing turbulence and interruption may be caused.
Disclosure of Invention
The invention aims to provide a coordinated communication method, a device and a storage medium for a plurality of carrier networks in the same station area, which can improve the comprehensive communication performance when a plurality of subnets coexist.
In order to achieve the purpose, the invention adopts the following technical solutions:
the coordinated communication method of a plurality of carrier networks in the same area, each carrier network comprises a CCO and a slave node, the CCO maintains the synchronous operation of the networks through beacon signals, and a superframe of a beacon period comprises a beacon time slot area and a CSMA time slot area;
the content of the beacon signal comprises the time slot length of the A phase node needing to be backed off in the network, the time slot length of the B phase node needing to be backed off in the network, the time slot length of the C phase node needing to be backed off in the network and the time offset from the current moment to the back-off start;
the coordinated communication method comprises the following steps:
s1, CCO of each carrier network in the same area sends a network coordination frame, the content of the network coordination frame comprises the length of an A phase time slot, the length of a B phase time slot and the length of a C phase time slot in the network;
s2, carrying out bandwidth coordination on each carrier network in the same distribution area;
and S3, after the coordination is completed, the CCO of each carrier network divides the beacon time slot zone in one beacon period into an A phase beacon time slot zone, a B phase beacon time slot zone and a C phase beacon time slot zone according to the network coordination frame, divides the CSMA time slot zone in one beacon period into a three-phase backoff time slot zone and a three-phase time slot zone according to the beacon signals, backs off the nodes in each phase on the time slots corresponding to the three-phase backoff time slot zone, and starts a CSMA channel contention access mechanism on the time slots corresponding to the three-phase time slot zone to transmit the signals.
Furthermore, the three-phase backoff time slot region comprises an a-phase backoff time slot region, a B-phase backoff time slot region and a C-phase backoff time slot region which are sequentially arranged, wherein an a-phase node performs backoff in the a-phase backoff time slot region, a B-phase node performs backoff in the B-phase backoff time slot region, and a C-phase node performs backoff in the C-phase backoff time slot region.
Furthermore, the A phase backoff time slot region comprises a B phase sub time slot region and a C phase sub time slot region which have the same time slot length, and the B phase node and the C phase node respectively send signals in the B phase sub time slot region and the C phase sub time slot region; the B phase back-off time slot area comprises an A phase sub-time slot area and a C phase sub-time slot area which have the same time slot length, and an A phase node and a C phase node respectively send signals in the A phase sub-time slot area and the C phase sub-time slot area; the C phase back-off time slot area is averagely divided into an A phase sub-time slot area and a B phase sub-time slot area, and an A phase node and a B phase node respectively send signals in the A phase sub-time slot area and the B phase sub-time slot area.
Further, the network coordination frame is performed on a time slot of the three-phase time slot zone.
The invention also provides a coordinated communication device of a plurality of carrier networks in the same station area, which comprises: a processing unit and a transceiver unit;
the receiving and sending unit is used for realizing the sending of beacon signals and the CCO sending of network coordination frames of all carrier networks in the same region, and a superframe of a beacon period comprises a beacon time slot region and a CSMA time slot region;
the processing unit is used for performing bandwidth coordination on each carrier network in the same distribution area;
the processing unit is further configured to divide the beacon slot region according to the network coordination frame, and divide the beacon slot region in one beacon period into an a-phase beacon slot region, a B-phase beacon slot region, and a C-phase beacon slot region;
and the processing unit is also used for dividing the CSMA time slot area into a three-phase backoff time slot area and a three-phase time slot area according to the beacon signal.
The present invention also provides a computer storage medium having stored thereon a plurality of instructions adapted to be loaded by a processor and to carry out the aforementioned method steps.
According to the technical scheme, the method introduces an isolation mechanism of cross-phase signals on the basis of the existing broadband coordination mechanism, further divides a beacon time slot area in a superframe into A/B/C three-phase node time slots through a network coordination frame, introduces a phase signal backoff mechanism in a CSMA time slot area, and can prohibit a corresponding phase node of a self network from transmitting signals in the corresponding time slot area according to the signal backoff mechanism of the CSMA time slot area when a node on a certain phase of an adjacent subnet transmits the beacon signals, so that the mutual interference between the beacon signals and non-beacon signals transmitted simultaneously by the adjacent subnet is reduced. The invention can effectively avoid the interference of other sub-network signals to the transmission process of the beacon signals through a cross-phase isolation mechanism among different phase signals of the power line and a new phase division mode of the CSMA time slot of each sub-network super-frame, and effectively improves the comprehensive communication performance when multiple sub-networks coexist.
Drawings
In order to illustrate the embodiments of the present invention more clearly, the drawings that are needed in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained by those skilled in the art without inventive effort.
Fig. 1 is a schematic diagram of time slot distribution when different subnets using the existing communication coordination mechanism coexist;
FIG. 2 is a schematic diagram of the topology of 2 subnets and the communication process thereof;
FIG. 3 is a schematic diagram of the operating phase lines of a broadband carrier network node;
FIG. 4 is a schematic diagram of a carrier network tree network topology;
fig. 5 is a schematic diagram of a superframe structure and timeslot division of a conventional broadband carrier communication network;
FIG. 6 is a schematic diagram of the time slot distribution when different subnets coexist using the method of the present invention;
FIG. 7 is a CSMA slot allocation diagram for CSMA slot area partitioning by existing protocols and CSMA slot area partitioning by the present invention;
FIG. 8 is a block diagram of a coordinating communication device according to an embodiment of the invention.
Detailed Description
The invention will be described in detail below with reference to the accompanying drawings, wherein for the purpose of illustrating embodiments of the invention, the drawings showing the structure of the device are not to scale but are partly enlarged, and the schematic drawings are only examples, and should not be construed as limiting the scope of the invention. It is to be noted, however, that the drawings are designed in a simplified form and are not to scale, but rather are to be construed in an attempt to more clearly and concisely illustrate embodiments of the present invention. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated; the terms "front," "back," "bottom," "upper," "lower," and the like refer to an orientation or positional relationship relative to an orientation or positional relationship shown in the drawings, which is for convenience and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
As shown in fig. 3, in a broadband carrier communication network which is widely used at present, in order to save the hardware cost of equipment, all nodes in the network, including a single-phase communication module (corresponding to an electric meter being a single-phase meter) and a three-phase communication module (corresponding to an electric meter being a three-phase meter), adopt half-duplex and single-physical communication channels, that is, a signal transceiver of the signal transceiver can only transmit or receive signals on one of a phase line of a/B/C three phase lines at each time point, but a CCO can change a working phase line at any time by switching. After the installation of other communication modules in the network is completed, the other communication modules can be fixed on one of the three phase lines of the A/B/C for working and cannot be switched whether being placed in a single-phase meter or a three-phase meter.
As shown in fig. 4, the broadband carrier network generally forms a multi-level association tree network with a concentrator (CCO) as a center and a proxy node (PCO) as a relay agent, and connects all the Slave Stations (STAs). The CCO operates as a central control node for network communications using a beacon period based superframe slot structure, while maintaining synchronization and orderly operation of the entire network using beacon signals.
Fig. 5 is a schematic diagram illustrating a superframe structure and time slot division of a conventional broadband carrier communication network, as shown in fig. 5, a superframe of a beacon period generally includes 4 time slots: a beacon slot region, a TDMA slot region, a CSMA slot region, and a bonded CSMA slot region. The TDMA time slot area and the binding CSMA time slot area are generally used only when the network is remotely upgraded, so that when the network normally communicates, the beacon period actually only includes the beacon time slot area and the CSMA time slot area, and the lengths of the remaining two time slot areas are both 0.
The CCO achieves synchronized ordered management of the entire network slot structure by using beacon signals, which are of 3 types: a central beacon signal, a proxy beacon signal, and a discovery beacon signal. The beacon signal carries a time slot allocation message, and a time slot allocation parameter of a beacon period is defined according to the time slot allocation message. The contents contained in the slot assignment message are shown in table 1.
Table 1 content definition of slot assignment message field
According to the existing protocol, when the TDMA time slot length is 0, the TDMA time slot zone length in the superframe is 0, and when the TDMA time slot length is not 0, the central coordinator obtains 3 TDMA time slots (a/B/C phase alternate stream transmission), and other proxy nodes respectively obtain 1 TDMA time slot in turn. In a three-phase broadband carrier network, a CSMA time slot area and a binding CSMA time slot area in a superframe structure can be divided into A/B/C phases, only a communication node of each phase is allowed to transmit signals in the CSMA time slot of each phase, for example, only a communication node of the A phase is allowed to transmit signals in the CSMA time slot of the A phase, and the B/C phases are the same.
The CCOs of the different subnets with the through links use a network coordination frame signal for bandwidth coordination, the content contained in the network coordination frame signal is shown in table 2.
TABLE 2 content definition of network coordination frame
The network coordination frame is used for ensuring that beacon time slot zones of different subnets do not overlap with each other on a time axis (see fig. 1), so that beacon signals between each other are prevented from colliding. However, the current mechanism ignores the collision problem between the beacon signal and the non-beacon signal of different subnets, once one subnet enters a heavy traffic load state in the coexisting subnet, the frequency of signal transmission in the CSMA slot area increases, although the channel access process of these signals uses the CSMA monitoring mechanism, the signals are affected by the hidden terminal problem of the multi-hop network, and these signals and the beacon signal of another subnet still have a large collision probability, so that the network communication performance of the coexisting subnet is greatly affected.
Most of the transmitted energy of the carrier signal can be transmitted along the direction of the power line where the carrier signal is located, although the antenna characteristics of the power line can cause that a certain proportion of the energy of the carrier signal is radiated to the air and then received by the adjacent live wire, compared with the wired channel transmission mode of the power line, the signal energy attenuation of the wireless channel transmission mode in the air is very large, and the electromagnetic energy receiving efficiency of the antenna is low, so that the effective distance of cross-phase transmission of the carrier signal is far smaller than that of in-phase transmission, and only exists between the cross-phase nodes with a very small space distance and a low proportion.
Based on the beacon system and the tree topology framework of the existing protocol, the invention designs a new network coordination frame signal by using the isolation mechanism of the cross-phase signal, adopts a new phase time slot division mechanism for the CSMA time slot area in the superframe structure, and provides a new bandwidth coordination method for the CCO of different networks, so as to solve the potential collision problem between the beacon signal and the non-beacon signal of different subnets under the condition of not influencing the communication performance of each subnet, thereby better ensuring the stable operation of the subnets of the same station area.
The content of the network coordination frame of the present invention is shown in table 3, and compared with the network coordination frame specified by the existing protocol, the content of the network coordination frame of the present invention includes a bandwidth start offset field, a received neighbor network number field, and also includes an a phase slot length field, a B phase slot length field, and a C phase slot length field, and these three phase slot fields respectively specify the slot length that each phase (a/B/C phase) in the present network needs to apply for occupation. That is, the length of the (beacon) time slot occupied by the network in the existing protocol is further divided, and the divided (beacon) time slot is respectively allocated to the nodes on 3 phases in the network for use, and simultaneously, the lengths of the beacon signals respectively transmitted by the nodes of the a phase, the B phase and the C phase in the beacon time slot are distinguished, so that the interference of other sub-network signals to the transmission process of the beacon signals is avoided by using a cross-phase isolation mechanism among different phase signals.
Table 3 content definition of network coordination frame of the present invention
In addition, the present invention further defines CSMA slot region back-off information in the beacon signal, the content of the CSMA slot region back-off information is shown in table 4, and the CSMA slot region back-off information specifically includes an a phase back-off slot region length field, a B phase back-off slot region length field, a C phase back-off slot region length field, and a back-off start offset field, where each phase back-off slot region length specifies the length of the slot that each phase node in the network needs to back off. The present invention further divides the CSMA time slot area in the superframe structure by adding CSMA time slot area retreat message on the basis of the time slot allocation message of the table 1.
TABLE 4 content definition of CSMA Slot zone Back-off message
Based on the network coordination frame and the beacon signal, the multi-carrier network coordination communication method comprises the following steps:
s1, the CCO of each sub-network in the same region sends a network coordination frame by using the existing mechanism;
s2, carrying out bandwidth coordination by respective networks in the same region by using the existing mechanism, wherein the bandwidth refers to the sum of the A, B, C three-phase time slot lengths in the table 3;
s3, after the coordination of the CCO is completed under the condition of coexistence of multiple sub-networks, the CCO of each sub-network divides the beacon time slot area in one beacon period into A/B/C three-phase node time slots according to the network coordination frame, and simultaneously divides the CSMA time slot area in one beacon period into two parts: a three-phase back-off time slot area and a three-phase time slot area. And nodes on each phase carry out backoff on the time slot corresponding to the three-phase backoff time slot region, namely do not send signals so as to reduce mutual signal interference, and the nodes on each phase start a CSMA channel contention access mechanism on the time slot corresponding to the three-phase time slot region to send the signals. Further, the three-phase back-off time slot region includes an a-phase back-off time slot region, a B-phase back-off time slot region and a C-phase back-off time slot region, which are sequentially arranged, and A, B, C the phase back-off time slot region is equally divided into two sub-time slot regions, for example, the a-phase back-off time slot region is equally divided into a B-phase sub-time slot region and a C-phase sub-time slot region, the a-phase node a-phase back-off time slot region does not transmit signals, the B-phase node and the C-phase node transmit signals in the respective corresponding sub-time slot regions, and so on, the B-phase back-off time slot region is equally divided into an a-phase sub-time slot region and a C-phase sub-time slot region, and the C-phase back-off time slot region is equally divided into an a-phase sub-time slot region and a-phase sub-time slot region (see fig. 6). The phase division method of the three-phase time slot region adopts the division method of the existing protocol (see the definition of CSMA time slot information in Table 1), which is not the innovation of the invention and is not described herein.
As shown in fig. 6, a superframe of one beacon period includes a beacon slot region, a TDMA slot region, a CSMA slot region, and a bonding CSMA slot region. Fig. 6 shows a superframe structure during normal network communication (non-remote upgrade phase), where the length of the TDMA slot area and the CSMA-bound slot area is 0, that is, a superframe of a beacon period actually includes only a beacon slot area and a CSMA slot area arranged in front and behind (when the length of the TDMA slot area and the CSMA-bound slot area is not 0, the TDMA slot area and the CSMA slot area follow the relevant mechanisms in the existing protocol), where the beacon slot area includes an a-phase beacon slot area, a B-phase beacon slot area, and a C-phase beacon slot area, the CSMA slot area includes a three-phase back-off slot area and a three-phase slot area, and the network coordination frame is executed on the corresponding slots of the three-phase slot area.
FIG. 7 is a schematic diagram showing the final division result of CSMA time slot regions when the method of the present invention is used for coordinated communication, the top CSMA time slot region in FIG. 7 is a result diagram of the CSMA time slot region divided by the existing protocol (Table 1), the middle is a result diagram of the three-phase back-off time slot region divided by the CSMA time slot region back-off mechanism (Table 4) of the present invention, and the bottom is a final division result diagram of the CSMA time slot region obtained by superimposing the result of the three-phase time slot division of the CSMA time slot region divided by the existing protocol and the three-phase back-off time slot region divided by the CSMA time slot region back-off mechanism of the present invention.
The invention divides the beacon time slot area into three-phase node time slots, introduces a phase signal avoidance mechanism in the CSMA time slot area, when the node on a certain phase of the adjacent sub-network sends a beacon signal, for example, when the A phase node of the adjacent sub-network sends the beacon signal, the A phase node of the network is prohibited to start the CSMA channel competition access mechanism in the corresponding time slot area through the beacon signal according to the signal avoidance mechanism introduced in the CSMA time slot area, thereby ensuring that the mutual interference level between the beacon signal and the non-beacon signal sent by the adjacent sub-network at the same time is reduced to the lowest level, and realizing the cooperative communication with higher efficiency of the multi-sub-network under the condition of not influencing the communication performance of the respective network.
The following are embodiments of the apparatus of the present application that may be used to perform embodiments of the method of the present application. For details which are not disclosed in the embodiments of the apparatus of the present application, reference is made to the embodiments of the method of the present application.
Fig. 8 is a block diagram illustrating a coordinated communication apparatus of multiple carrier networks in the same cell according to an exemplary embodiment of the present application. The means may be implemented by software, hardware or a combination of both. The coordinating communication device comprises a processing unit and a transceiving unit.
The receiving and sending unit is used for realizing the sending of the beacon signals and the CCO sending of the network coordination frames of all the carrier networks in the same region;
the processing unit is used for carrying out bandwidth coordination on each carrier network in the same region;
the processing unit is further used for dividing the beacon time slot area according to the network coordination frame, and dividing the beacon time slot area in one beacon period into an A-phase beacon time slot area, a B-phase beacon time slot area and a C-phase beacon time slot area;
and the processing unit is also used for dividing the CSMA time slot area into a three-phase backoff time slot area and a three-phase time slot area according to the beacon signal.
And the transceiver unit enables the nodes on each phase to carry out back-off on the time slot corresponding to the three-phase back-off time slot region, and starts a CSMA channel competition access mechanism on the time slot corresponding to the three-phase time slot region to send signals.
It should be noted that, when the apparatus provided in the foregoing embodiment executes the foregoing coordinated communication method, only the division of the functional modules is illustrated, and in practical applications, the above function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules, so as to complete all or part of the functions described above. In addition, the coordinated communication apparatus provided in the foregoing embodiment and the coordinated communication method embodiment of multiple carrier networks in the same station area belong to the same concept, and details of the implementation process are referred to as method embodiments, and are not described herein again.
The embodiment of the present application further provides a computer storage medium, where the computer storage medium may store a plurality of instructions, where the instructions are suitable for being loaded by a processor and executing the method steps in the foregoing embodiment, and a specific execution process may refer to a specific description of the method embodiment, which is not described herein again.
The concept and the method embodiment of the present embodiment are the same, and the technical effects brought by the same, and the specific process may refer to the description of the method embodiment, which is not described herein again.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a read-only memory or a random access memory.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The coordinated communication method of a plurality of carrier networks in the same area, each carrier network comprises a CCO and a slave node, the CCO maintains the synchronous operation of the networks through beacon signals, and a superframe of a beacon period comprises a beacon time slot area and a CSMA time slot area; the method is characterized in that:
the content of the beacon signal comprises the time slot length of the A phase node needing to be withdrawn in the network, the time slot length of the B phase node needing to be withdrawn in the network, the time slot length of the C phase node needing to be withdrawn in the network and the time offset from the current moment to the beginning of withdrawal;
the coordinated communication method comprises the following steps:
s1, CCO of each carrier network in the same region sends a network coordination frame, and the content of the network coordination frame comprises the length of an A phase time slot, the length of a B phase time slot and the length of a C phase time slot in the network;
s2, carrying out bandwidth coordination on each carrier network in the same distribution area;
and S3, after the coordination is completed, the CCO of each carrier network divides the beacon time slot zone in one beacon period into an A phase beacon time slot zone, a B phase beacon time slot zone and a C phase beacon time slot zone according to the network coordination frame, divides the CSMA time slot zone in one beacon period into a three-phase backoff time slot zone and a three-phase time slot zone according to the beacon signals, backs off the nodes in each phase on the time slots corresponding to the three-phase backoff time slot zone, and starts a CSMA channel contention access mechanism on the time slots corresponding to the three-phase time slot zone to transmit the signals.
2. The method of claim 1, wherein: the three-phase backoff time slot region comprises an A-phase backoff time slot region, a B-phase backoff time slot region and a C-phase backoff time slot region which are sequentially arranged, wherein an A-phase node performs backoff in the A-phase backoff time slot region, a B-phase node performs backoff in the B-phase backoff time slot region, and a C-phase node performs backoff in the C-phase backoff time slot region.
3. The method of coordinated communication of a plurality of carrier networks within the same cell as set forth in claim 2, wherein: the A phase backoff time slot region comprises a B phase sub time slot region and a C phase sub time slot region which have the same time slot length, and the B phase node and the C phase node respectively send signals in the B phase sub time slot region and the C phase sub time slot region; the B phase back-off time slot area comprises an A phase sub-time slot area and a C phase sub-time slot area which have the same time slot length, and an A phase node and a C phase node respectively send signals in the A phase sub-time slot area and the C phase sub-time slot area; the C phase back-off time slot area is averagely divided into an A phase sub-time slot area and a B phase sub-time slot area, and the A phase node and the B phase node respectively send signals in the A phase sub-time slot area and the B phase sub-time slot area.
4. The method of claim 1, wherein: the network coordination frame is performed on a time slot of the three-phase time slot zone.
5. A device for coordinating communications among a plurality of carrier networks in a same cell, comprising: a processing unit and a transceiver unit;
the receiving and sending unit is used for realizing the sending of beacon signals and the CCO sending of network coordination frames of all carrier networks in the same region, and a superframe of a beacon period comprises a beacon time slot region and a CSMA time slot region;
the processing unit is used for performing bandwidth coordination on each carrier network in the same station area;
the processing unit is further configured to divide the beacon slot region according to the network coordination frame, and divide the beacon slot region in one beacon period into an a-phase beacon slot region, a B-phase beacon slot region, and a C-phase beacon slot region;
and the processing unit is also used for dividing the CSMA time slot area into a three-phase backoff time slot area and a three-phase time slot area according to the beacon signal.
6. The apparatus for coordinated communication of a plurality of carrier networks within the same cell as in claim 5, wherein: the transceiver unit is also used for enabling the nodes on each phase to carry out back-off on the time slot corresponding to the three-phase back-off time slot region, and starting a CSMA channel competition access mechanism on the time slot corresponding to the three-phase time slot region to send signals.
7. The apparatus for coordinated communication of a plurality of carrier networks within the same cell as in claim 5, wherein: the content of the beacon signal comprises the length of a time slot in which the A phase node needs to back off in the network, the length of a time slot in which the B phase node needs to back off in the network, the length of a time slot in which the C phase node needs to back off in the network and the time offset from the current time to the back off start.
8. The apparatus for coordinated communication of a plurality of carrier networks within the same cell as in claim 5, wherein: the three-phase backoff time slot region comprises an A-phase backoff time slot region, a B-phase backoff time slot region and a C-phase backoff time slot region which are sequentially arranged, wherein an A-phase node performs backoff in the A-phase backoff time slot region, a B-phase node performs backoff in the B-phase backoff time slot region, and a C-phase node performs backoff in the C-phase backoff time slot region.
9. The apparatus for coordinated communication of a plurality of carrier networks within the same cell as in claim 5, wherein: the A phase backoff time slot region comprises a B phase sub time slot region and a C phase sub time slot region which have the same time slot length, and the B phase node and the C phase node respectively send signals in the B phase sub time slot region and the C phase sub time slot region; the B phase back-off time slot area comprises an A phase sub-time slot area and a C phase sub-time slot area which have the same time slot length, and an A phase node and a C phase node respectively send signals in the A phase sub-time slot area and the C phase sub-time slot area; the C phase back-off time slot area is averagely divided into an A phase sub-time slot area and a B phase sub-time slot area, and the A phase node and the B phase node respectively send signals in the A phase sub-time slot area and the B phase sub-time slot area.
10. A computer storage medium, characterized in that it stores a plurality of instructions adapted to be loaded by a processor and to perform the method steps according to any of claims 1 to 4.
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