CN100426877C - Method of communication by bimode terminal - Google Patents

Abstract

The present invention discloses a method for double-module terminal communication. The method comprises the steps that a base station judge whether the traffic is a local traffic or not after receiving switch-in requirements from source mobile nodes. When the traffic is the local traffic, the present invention can execute the step B; otherwise, the present invention can execute the step C. The present invention has the step B that a base station indication source and purpose mobile nodes can be communicated via an automatic organizing mode, source mobile nodes can send self traffic data to the purpose mobile nodes via a direct method or a relay method, and then current process ends. The present invention has the step C that the base station indication source and the purpose mobile nodes can forward the traffic data via the base station, the source mobile nodes can send self traffic data to the base station via a direct method or a relay method, and the base station can send the traffic data to the purpose mobile nodes via a direct method or a relay method. The method of the present invention can improve systemic throughput and can optimize systemic performance.

Description

A method for communicating with a dual-mode terminal

technical field

The invention relates to mobile communication technology, in particular to a communication method for a dual-mode terminal.

Background technique

Mobile communication networks are generally divided into two categories: infrastructure-based networks and infrastructure-free networks. Among them, infrastructure-based networks, such as cellular mobile networks, use fixed base stations with multiple transceivers and can work in full-duplex mode, as well as wired backbone network systems that can transmit large-capacity to realize terminal instant Communication between mobile stations; networks without infrastructure, such as mobile ad hoc networks (Ad Hoc Network), without infrastructure, in the network, terminals configured with specific protocols, that is, mobile nodes, move directly or through other relays Nodes communicate.

At present, the cellular mobile communication technology based on infrastructure is maturing day by day. Since the base stations controlling the communication of the mobile station in the cellular network are widely distributed in various regions, the mobile station can easily complete data transmission through the base station. Therefore, using a base station in a cellular network to transmit terminal data has become the most commonly used and easiest to implement communication method at present. However, it is not easy to make large-scale adjustments after the cellular network is built, and it cannot adapt to changes in the load, that is, the number of users. In particular, due to network leakage coverage or radio waves encountering buildings, valleys, mountain shadows and other terrains during propagation, there are many dead zones, shadow areas or deep fading in the cellular network where the wireless signal of the base station cannot reach or the strength is extremely weak. Areas, such as near train tracks, inside elevators, etc. This makes the system unable to provide transmission services to the mobile stations in these areas, thus reducing the throughput of the system and reducing the performance of the system.

The mobile ad hoc network does not require infrastructure, and only needs to configure related protocols, such as routing protocols and MAC protocols, in the terminal equipment, that is, the mobile node. When the channel conditions between multiple mobile nodes are good and can meet the service transmission requirements, the multiple mobile nodes can automatically form an ad hoc network. Therefore, after the self-organizing network is formed, it is very convenient to adjust the network, and can better adapt to the change of the load. More importantly, in an ad hoc network, each mobile node is equivalent to a router, which can complete the function of discovering and maintaining routes to other mobile nodes. Direct "point-to-point" communication can be carried out between two adjacent mobile nodes, and dynamic search routes can be used between non-adjacent nodes to make data packets forwarded by other mobile nodes in a "multi-hop mode" to destination node without forwarding through the base station. Therefore, in an ad-hoc network, a mobile node can easily find neighboring mobile nodes whose wireless signal is sufficient to reach, reducing the probability of being in a dead zone, a shadow zone or a deep fading zone, thus making the system throughput as high as possible. Greatly increased and improved system performance.

However, due to the influence of technology or human factors, the control of mobile ad hoc networks is complicated at present, and its practical application is far less extensive than that of cellular networks. Moreover, it is not easy for ad hoc networks to meet the quality of service (QoS) requirements of services. For example, for voice services that require high delay, when two communicating mobile nodes are far apart, the voice data must pass through multiple relays. The mobile node can reach the receiver, which will cause a long delay, which cannot meet the delay requirement of the voice service at all. Therefore, the combination of cellular and ad hoc networks is considered to be a development trend of future wireless access networks. It can integrate the performance advantages of cellular networks and ad hoc networks, and is expected to support future high data rates and multimedia services, and provide users with adaptive and flexible access services. However, existing studies, including the Option-Opportunity Driven Multiple Access (ODMA) protocol in 3GPP, only discuss various forms of cellular and ad hoc network integration and the performance improvements they bring, without involving specific Realize the problem.

Therefore, it has become an urgent problem to provide a method for enabling a terminal to flexibly work in a cellular network, an ad hoc network, or a combination of cellular and ad hoc networks.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a communication method for a dual-mode terminal to optimize system performance.

In order to achieve the above object, the technical solution of the present invention is achieved in that:

A method for communicating with a dual-mode terminal, comprising the following steps:

A. After receiving the access request sent by the source mobile node, the base station judges whether the destination mobile node is in its own coverage area according to the identifier of the destination mobile node carried in the access request, and the channel between the source and destination mobile nodes Whether the conditions meet the requirements of this transmission, if yes, then determine that this service is a partial service, and perform step B, otherwise, perform step C;

B. The base station judges whether this service is a real-time service. If it is a real-time service, the base station specifies channel resources or paths, and instructs the source and destination mobile nodes to communicate in an ad hoc manner using the specified channel resources or paths. The source mobile node then Send its own business data to the destination mobile node, and then end the current process. If it is not a real-time business, the base station instructs the source and destination mobile nodes to use the reserved channel resources to communicate in an ad hoc manner, and the source mobile node sends its own business data Send to the destination mobile node, and then end the current process

C. The base station instructs the source and destination mobile nodes to forward service data through the base station, and the source mobile node sends its own service data to the base station in a direct or relay manner, and the base station then sends the service data to the destination mobile node.

The base station instructing the source and the destination mobile node to use the designated channel resource to communicate in an ad hoc manner includes: the base station instructing the source and the destination mobile node to use the designated channel resource to perform point-to-point communication;

The source mobile node sending its own service data to the destination mobile node includes: the source mobile node directly sends its own service data to the destination mobile node by using the designated channel resource.

The base station specifies a path, and instructs the source and destination mobile nodes to use the specified path to communicate in an ad hoc manner, including: the base station determines a path composed of relay mobile nodes that meets the real-time service delay requirement according to specific criteria, instructing source and destination mobile nodes to communicate using said path;

The source mobile node sending its own service data to the destination mobile node includes: the source mobile node sending its own service data to the destination mobile node through the relay mobile node in the path.

Said specific criteria include minimum overall path loss or shortest path length.

When the base station instructs the source and destination mobile nodes to use reserved channel resources to communicate in an ad hoc manner, the source mobile node sends its own service data to the destination mobile node, including:

The source mobile node selects a route according to the routing protocol configured by itself, and sends its service data to the destination mobile node through the relay mobile node in the selected route.

The method further includes: when the current service is not a partial service, the base station judges whether the current service is a real-time service, if so, the base station instructs the source and destination mobile nodes to forward the service data through the base station, and the source mobile node directly sends the service data to the base station , the base station sends the service data directly to the destination mobile node;

If not, the base station instructs the source and destination mobile nodes to use the reserved channel resources to send service data to the base station, and the source mobile node selects the route to the base station according to the routing protocol configured by itself, and passes through the relay mobile node in the selected route. The service data is sent to the base station, and the base station sends the service data from the source mobile node to the destination mobile node through the relay mobile node in the selected route.

The method further includes: when the current service is not a local service, and the destination mobile node is in an area where the wireless signal of the base station is difficult to reach effectively;

C1. The base station broadcasts the paging destination mobile node through the broadcast channel, and judges whether it receives a valid response signal returned by the destination mobile node within the set time. If it receives it, it performs the normal downlink transmission process and ends this process. If If not received, execute step C2;

C2. The base station broadcasts the adjacent mobile nodes of the paging destination mobile node through the broadcast channel;

C3. After receiving the broadcast paging from the base station, each adjacent mobile node of the destination mobile node sends an access request to the base station respectively:

C4. The base station calculates the path loss from the base station itself to each adjacent mobile node and then to the destination mobile node, selects the path with the smallest loss, and sends the service data to the destination mobile node through the adjacent mobile nodes in the selected path.

In step C4, the step of the base station sending the service data to the destination mobile node through the adjacent mobile node in the selected path includes the following steps:

C41. The base station sends the service data to the adjacent mobile node of the destination mobile node in the selected path. After receiving the service data sent by the base station, the adjacent mobile node sends a request signaling carrying its own identification to the destination mobile node;

C42. After receiving the request signaling sent by the adjacent mobile node, the destination mobile node sends a response signaling to the adjacent mobile node. After receiving the response signaling sent by the destination mobile node, the adjacent mobile node sends The service information of this service is sent to the destination mobile node;

C43. After the destination mobile node receives the service information sent by the neighbor mobile node, it sends the allocation signaling carrying the codeword and time slot to the neighbor mobile node, and the neighbor mobile node receives the service information sent by the destination mobile node After the allocation signaling is sent, the service data is sent to the destination mobile node by using the code word and time slot allocated in the allocation signaling.

Before the base station receives the access request from the source mobile node, it further includes: the source mobile node sends the access request carrying its own identity to the base station by competing for an uplink random access channel;

When the base station receives the access request sent by the source mobile node, it first judges whether it is legal according to the identity of the source mobile node, and if it is legal, then continues to execute the above-mentioned when the service is a partial service, the base station judges whether the service is It is a step for real-time business, otherwise, jump out of this process.

After the base station receives the access request from the source mobile node, it further includes: the source mobile node that sends the access request to the base station listens to the broadcast channel;

The base station instructing the source and destination mobile nodes to use the specified channel resource or path to communicate includes: the base station instructs the source and destination mobile nodes to use the specified channel resource or path to communicate through the broadcast channel, and the source mobile node monitors the channel resource or path from the broadcast channel After receiving the instruction, send business data.

Visible, the method that the present invention proposes has the following advantages:

1. In the present invention, the base station determines the communication mode of the mobile node according to the type of service carried out by the terminal, that is, the mobile node, and the distance and channel conditions between the mobile nodes, thereby meeting the QoS requirements of different services and optimizing the performance of the system.

2. In the present invention, when the mobile node is in a shaded area, a deep fading area or a dead zone, the base station relays and forwards service data through the adjacent mobile nodes of the mobile node to ensure service transmission. Therefore, the probability of service transmission failure is reduced, and the throughput of the system is greatly improved.

3. In the present invention, when carrying out local services, the mobile node communicates in the self-organizing network mode, thereby releasing the base station from a large amount of forwarding work under the premise of ensuring service transmission, and reducing the load of the base station.

4. If the communication is carried out through the mobile ad hoc network alone, there will be control difficulties and the shortcomings of being unable to meet the service quality requirements of the business. Therefore, the present invention combines the current mature and widely used cellular mobile network with the mobile ad hoc network. Communication, not only can use the base station in the cellular network to achieve flexible control and meet the QoS requirements of the service, but also can take advantage of the advantages of the self-organizing network, such as the mobile node forwarding service data through multiple relay mobile nodes to make the system frequency reuse degree Advanced, to further optimize the performance of the system.

Description of drawings

FIG. 1 is a schematic diagram of a mobile node communicating in a dual-mode manner in the present invention.

Fig. 2 is a flow chart of the mobile node communicating in the dual-mode mode in the present invention.

Fig. 3 is a schematic diagram of realizing downlink transmission in an embodiment of the present invention when the destination mobile node is in an area where the radio signal of the base station cannot reach.

Fig. 4 is a flow chart of realizing downlink transmission in an embodiment of the present invention when the destination mobile node is in an area where the wireless signal of the base station cannot reach.

Fig. 5a is an effect diagram of the present invention improving system throughput when the number of users is 100.

Fig. 5b is an effect diagram of improving system throughput of the present invention when the number of users is 200.

Fig. 5c is an effect diagram of improving the system throughput of the present invention when the number of users is 300.

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

The present invention utilizes the combination of the currently mature and widely used cellular network and the self-organizing network to provide a method capable of enabling terminals to communicate in a dual-mode mode according to service requirements. FIG. 1 is a schematic diagram of a terminal communicating in a dual-mode mode in the present invention. Referring to FIG. 1 , the terminal in the present invention is a dual-mode terminal, that is, the terminal is a mobile node that can work in both a cellular network and an ad hoc network. The mobile node communicates in a dual-mode mode, which means that the service data between the source and the destination mobile node is forwarded through the base station, that is, the communication is carried out in the cellular network mode; or, the source and the destination mobile node communicate directly or through other relays The mobile node transmits service data, that is, communicates in an ad hoc network mode; or, the source and destination mobile nodes transmit service data through other relay mobile nodes and base stations, that is, communicates in a combination of ad hoc network and cellular network .

Fig. 2 is a flow chart of the mobile node communicating in the dual-mode mode in the present invention. Referring to Fig. 2, in the present invention, the specific implementation process that mobile node communicates in dual-mode mode comprises the following steps:

Step 201: The source mobile node with a service request sends an access request signaling (RA_Req) to the base station through an uplink random access channel RACH.

Here, the access request signaling sent by the source mobile node includes its own identification (ID), the service type of the data to be sent, the number of data packets to be sent, and the ID of the destination mobile node. In addition, the source mobile node may send the access request signaling in a traditional way, that is, by contending for an uplink random access channel RACH.

Step 202: After receiving the access request signaling sent by the source mobile node, the base station authenticates the source mobile node to determine whether it is legal. If it is legal, execute step 203. If not, reject the source mobile node Connect to the network and end this process.

Step 203: the base station allows the source mobile node to access the network, and the source mobile node starts to monitor the broadcast channel BCCH, waiting for a policy decision from the base station.

Step 204: the base station judges whether the current service is a local service, if yes, execute step 205, otherwise, execute step 210.

Here, the process for the base station to judge whether this service is a partial service is as follows: the base station judges whether the source and destination mobile nodes are both in their own coverage areas, and whether the channel conditions between the source and destination mobile nodes, such as channel bandwidth, can satisfy The requirements for this service transmission. If both conditions are satisfied, the base station considers this service as a local service, and if any of the conditions is not satisfied, the base station considers this service as a non-local service.

Step 205: The base station judges whether the current service is a real-time service according to the service type of the data to be sent carried in the access request signaling. If yes, perform step 206; if not, perform step 208.

Here, the real-time service may be a voice service, and the non-real-time service may be an ordinary data service.

Steps 206 to 207: The base station specifies channel resources, and instructs the source and destination mobile nodes to use the designated channel resources to communicate in the ad hoc network mode, and the source and destination mobile nodes use the channels specified by the base station to communicate in the ad hoc network mode. point-to-point direct communication.

The specific implementation process here is: the base station makes a policy decision, specifies channel resources for this service, including the channel and bandwidth used by the source and destination mobile nodes for communication, and specifies the source and destination mobile nodes to use the specified channel The resource conducts point-to-point direct communication in the self-organizing network mode, and then the base station broadcasts the policy decision on the downlink broadcast channel BCCH; after the source mobile node monitors the policy decision sent by the base station from the broadcast channel BCCH, it passes The channel directly sends its own service data to the destination mobile node until the service ends.

Here, because it is a local real-time service, the base station specifies channel resources for the source and destination mobile nodes, and the source and destination mobile nodes use the specified channel resources to conduct point-to-point direct communication in an ad hoc network mode, which can greatly reduce transmission Delay, so as to meet the requirements of real-time business.

Here, in order to save transmission power, the source and destination mobile nodes can also communicate in a multi-hop manner through other relay nodes under the condition that the transmission delay of this real-time service is allowed. Correspondingly, the specific implementation process of steps 206 to 207 is: the base station makes a policy decision, that is, under the condition that the real-time service delay is allowed, according to a certain criterion, such as the smallest overall path loss or the shortest path length etc., select the route between the source and the destination mobile node, and specify the source and the destination mobile node to communicate in the multi-hop mode of the ad hoc mode according to the selected route, and then the base station broadcasts the policy decision in the downlink broadcast channel BCCH; the source After the mobile node listens to the strategy decision sent by the base station from the broadcast channel BCCH, it sends its own service data to the destination mobile node through each relay mobile node in the route selected by the base station until the service ends.

Steps 208 to 209: The base station instructs the source and destination mobile nodes to use the reserved channel resources to communicate in the ad hoc network mode, and the source and destination mobile nodes select a route and pass through each relay node in the selected route to communicate in the ad hoc network mode Perform multi-hop communication.

The specific implementation process here is as follows: the base station makes a policy decision, that is, instructs the source and destination mobile nodes to use the reserved channel resources to communicate in the ad hoc network mode, and then broadcasts the policy decision in the downlink broadcast channel BCCH; the source mobile node broadcasts the policy decision from the broadcast After listening to the policy decision sent by the base station in the channel, select a route according to the routing protocol configured by itself, and then send the service data to the destination mobile node through each relay mobile node in the selected route until the end of the service.

Here, since the non-real-time service does not have excessive requirements on transmission delay, the base station only needs to instruct the source and destination mobile nodes to communicate through reserved channel resources.

Step 210: The base station judges whether the current service is a real-time service according to the service type of the data to be sent carried in the access request signaling. If yes, perform step 211, and if not, perform step 213.

Steps 211 to 212: the base station instructs the source and destination mobile nodes to forward service data through the base station in the cellular network mode, and the source and destination mobile nodes communicate directly through the base station in a single-hop manner, that is, in the cellular network mode.

The specific implementation process here is: the base station makes a policy decision, that is, instructs the source and destination mobile nodes to communicate in the cellular network mode, that is, the mode in which the base station forwards service data, and then the base station broadcasts the policy decision in the downlink broadcast channel BCCH; the source mobile node After the node listens to the strategy decision sent by the base station from the broadcast channel BCCH, it sends its own service data directly to the base station, and the base station sends the service data directly to the destination mobile node until the end of the service.

Here, since it is a non-local real-time service, if the base station instructs the source and destination mobile nodes to communicate in ad-hoc mode, the source and destination mobile nodes need to select routes according to the routing protocol, and pass through multiple relay nodes to transmit their own business The data is sent to the receiver, which will cause a large transmission delay, which cannot meet the requirements of real-time services for transmission delay. Therefore, the strategic decision made by the base station is to make the source and destination mobile nodes forward service data directly through the base station itself, so as to reduce transmission links and transmission delay, and meet the requirements of this real-time service.

Steps 213 to 214: The base station instructs the source and destination mobile nodes to forward service data through the base station and relay mobile nodes, and the source and destination mobile nodes communicate with each relay mobile node through the base station in a multi-hop manner, that is, an ad hoc network Communication with the cellular network.

The specific implementation process here is: the base station makes a policy decision, that is, instructs the source and destination mobile nodes to use the reserved channel resources to forward their own business data to the base station through the relay mobile node, and then the base station forwards the business data through the relay node to the destination mobile node, and then the base station broadcasts the policy decision in the downlink broadcast channel BCCH; after the source mobile node monitors the policy decision of the base station from the broadcast channel BCCH, it selects the route to the base station according to the routing protocol configured by itself, and passes the business data through Each relay mobile node in the selected route forwards it to the base station, and the base station sends the received service data to the destination mobile node through each relay mobile node in the route selected by itself until the service ends.

So far, the present invention completes the process of enabling the mobile node to communicate in a dual-mode mode combining the self-organizing network and the cellular network.

In the present invention, when the mobile node forwards service data through the base station, if the destination mobile node is in a shadow, deep fading area or dead zone where the wireless signal of the base station cannot reach, the base station cannot transmit the service data in the downlink transmission link. The data is sent to the destination mobile node. In order to solve this problem, the method of the present invention is: the base station broadcasts the adjacent mobile nodes of the paging destination mobile node, and after receiving the response returned by the adjacent mobile nodes of the destination mobile node, selects an adjacent mobile node as the middle the relay mobile node, and then send the service data to the destination mobile node through the selected relay mobile node.

The following is an embodiment of the present invention for providing downlink transmission for the destination mobile node in shadow, deep fading area or dead zone. In this embodiment, the destination mobile node in the shadow, deep fading area or dead zone is mobile node C, and the base station learns that mobile node A and mobile node B are neighboring mobile nodes of mobile node C. Here, the reason why the base station can know that mobile node A and mobile node B are adjacent mobile nodes of mobile node C is because, when initially establishing a route, destination mobile node C will broadcast its detection frame in the broadcast channel BCCH; After listening to the detection frame sent by mobile node C from the broadcast channel BCCH, mobile node A and mobile node B know that they are adjacent nodes of mobile node C; mobile node A and mobile node B regard themselves as adjacent nodes of mobile node C respectively. The node information is reported to the base station, so that the base station knows that the adjacent mobile nodes of the target mobile node C are mobile node A and mobile node B.

Fig. 3 is a schematic diagram of realizing downlink transmission in an embodiment of the present invention when the destination mobile node is in an area where the radio signal of the base station cannot reach. Fig. 4 is a flow chart of realizing downlink transmission in an embodiment of the present invention when the destination mobile node is in an area where the wireless signal of the base station cannot reach. Referring to Fig. 3 and Fig. 4, in the present invention, the specific implementation process that the base station sends service data to the purpose mobile node C in the downlink transmission link includes the following steps:

Step 401: The base station broadcasts the paging destination mobile node C through the broadcast channel BCCH, and judges whether a valid response signal returned by the mobile node C is received within the set time. If it is received, the normal downlink transmission process is performed, and this process ends , if not received, go to step 402.

Here, if the base station does not receive the response signal returned by the destination mobile node C within the set time, or the received response signal is very weak, it considers that no valid response signal returned by the mobile node C has been received.

Step 402: The base station broadcasts the ID of the mobile node C on the broadcast channel BCCH to page the neighboring mobile nodes of the mobile node C.

Here, the base station paging the adjacent mobile nodes of the mobile node C in the broadcast channel is to trigger the mobile node A and the mobile node B to communicate with the base station, so as to complete the subsequent work of forwarding service data through the adjacent mobile nodes.

Step 403: After listening to the paging of the base station from the broadcast channel BCCH, the adjacent mobile nodes A and B of the mobile node C send their own access request signaling to the base station through the random access channel RACH.

Step 404: After receiving the access request signaling from mobile nodes A and B, the base station calculates the path loss from itself to mobile node A to destination mobile node C, and from itself to mobile node B to destination mobile node C path loss.

Step 405: The base station compares the calculated two path losses, and selects the path with the smaller loss, such as selecting the path from the base station to the mobile node A and then to the destination mobile node C, and then the base station broadcasts the path loss on the broadcast channel BCCH. selected path.

Here, since the base station selects a path from itself to mobile node A and then to mobile node C, mobile node A becomes the relay mobile node for this service transmission.

Step 406: the base station sends the current service data to the mobile node A, and the mobile node A sends a request signaling (REQ) carrying its own ID to the mobile node C after receiving the service data.

Step 407: After receiving the request signaling (REQ) carrying its ID sent by the mobile node A, the mobile node C returns a response signaling (REP) to the mobile node A.

Here, the purpose of exchanging REQ signaling and REP signaling is to prepare mobile nodes C and A for communication.

Step 408: After receiving the response signaling (REP) sent by the mobile node C, the mobile node A sends the relevant service information to the mobile node C.

Here, the relevant service information refers to information such as the bit rate of the packet, the required signal-to-noise ratio (SIR), and the length of the data packet.

Step 409: After receiving the relevant service information sent by the mobile node A, the mobile node C sends the allocation signaling (ALLC) to the mobile node A.

Here, the ALLC signaling includes the sending code word and the time slot allocated by the mobile node C for the mobile node A.

Step 410: After receiving the allocation signaling (ALLC) from the mobile node C, the mobile node A sends the service data packet to the mobile node C by using the code word and time slot allocated in the ALLC signaling.

So far, the present invention completes the process of providing downlink transmission for the destination mobile node in the shadow, deep fading area or dead zone.

Fig. 5a, Fig. 5b and Fig. 5c show the improvement of the system downlink throughput by the present invention under different numbers of users. It can be seen that, using the method of the present invention for enabling mobile nodes to communicate in a dual-mode manner, the system downlink throughput is significantly greater than the throughput of simple cellular communication, and the degree of throughput improvement increases with the number of users and the radius of the cell. The size of the community increases. This is because the more users and the larger the radius of the cell, the more the number of terminals in the shadow, deep fading or dead zone in the cellular network, then, using the method of the present invention, the terminal number in the shadow, deep fading or The terminal in the dead zone, that is, the mobile node, has a higher probability of finding the relay node, and more terminals realize communication. Therefore, the improvement effect on the system throughput is more obvious.

In a word, the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1, a kind of method of communication by bimode terminal is characterized in that, this method may further comprise the steps:

After A, base station receive the access request that the source mobile node sends, judge according to the sign that inserts the purpose mobile node that carries in the request whether this purpose mobile node is in self overlay area, and whether the channel condition between the source and destination mobile node satisfies this transmission requirement, if, judge that then this business is local professional, execution in step B, otherwise, execution in step C;

B, the base station judges whether this business is real time business, if real time business, base station allocated channel resource or path, and indication source and destination mobile node utilizes this channel appointed resource or path to communicate with the self-organizing form, the source mobile node then is sent to the purpose mobile node with the business datum of self, finish current flow process then, if not real time business, the channel resource that the utilization of base station indication source and destination mobile node is reserved communicates with the self-organizing form, the source mobile node then is sent to the purpose mobile node with the business datum of self, finishes current flow process then

C, base station indication source and destination mobile node are transmitted business datum by the base station, the source mobile node then is sent to the base station with the business datum of self with direct mode or trunking scheme, and the base station is sent to the purpose mobile node with this business datum with direct mode or trunking scheme again.

2, method according to claim 1, it is characterized in that described base station indication source and destination mobile node utilizes this channel appointed resource to communicate with the self-organizing form to comprise: base station indication source and destination mobile node utilizes this channel appointed resource to carry out the communication of point-to-point;

Described source mobile node then is sent to the purpose mobile node with self business datum and comprises: the source mobile node then utilizes this channel appointed resource that the business datum of self directly is sent to the purpose mobile node.

3, method according to claim 1, it is characterized in that, described base station specified path, and indication source and destination mobile node utilizes the path of this appointment to communicate with the self-organizing form to comprise: the path of being made up of the relaying mobile node of this real time business delay requirement is determined to satisfy according to certain criteria in the base station, indicates the source and destination mobile node to utilize described path to communicate;

Described source mobile node then is sent to the purpose mobile node with self business datum and comprises: the source mobile node is sent to the purpose mobile node with the business datum of self by the relaying mobile node in the described path.

4, method according to claim 3 is characterized in that, described certain criteria comprises minimum overall pathloss or the shortest path.

5, method according to claim 1, it is characterized in that, when the channel resource that the utilization of base station indication source and destination mobile node is reserved communicated with the self-organizing form, described source mobile node then was sent to the purpose mobile node with self business datum and comprises:

The source mobile node is chosen route according to the Routing Protocol of self configuration, and by the relaying mobile node in the selected route own service data is sent to the purpose mobile node.

6, method according to claim 1, it is characterized in that, this method further comprises: when this business is not local business, the base station judges whether this business is real time business, if, base station indication source and destination mobile node is transmitted business datum by the base station, and the source mobile node directly is sent to the base station with business datum, and the base station directly is sent to the purpose mobile node with this business datum again;

If not, the channel resource that the utilization of base station indication source and destination mobile node is reserved sends to the base station with business datum, the source mobile node is then chosen the route that arrives the base station according to the Routing Protocol that self disposes, and business datum being sent to the base station by the relaying mobile node in the selected route, the base station will be sent to the purpose mobile node from the business datum of source mobile node by the relaying mobile node in the selected route again.

7, method according to claim 1 is characterized in that, this method further comprises: in this business is not local professional, and the described purpose mobile node wireless signal that is in the base station be difficult to effectively to arrive regional the time;

C1, base station judge whether receive the significant response signal that this purpose mobile node returns in setting-up time, if receive by broadcast channel broadcasts paging purpose mobile node, then carry out normal downlink transmission process, and process ends, if do not receive, execution in step C2 then;

The neighboring mobile node of broadcast channel broadcasts paging purpose mobile node is passed through in C2, base station;

After each neighboring mobile node of C3, purpose mobile node received the Radio Paging of base station, the request of will inserting respectively was sent to the base station;

C4, base station calculate respectively from the base station self to each neighboring mobile node again to the path loss of purpose mobile node, select the path of wherein loss minimum, and business datum be sent to the purpose mobile node by the neighboring mobile node in the selected path.

8, method according to claim 7 is characterized in that, among the step C4, described base station may further comprise the steps the step that business datum is sent to the purpose mobile node by the neighboring mobile node in the selected path:

C41, base station send to the neighboring mobile node of the purpose mobile node in the selected path with business datum, after this neighboring mobile node receives the business datum of sending the base station, send the demand signalling that carries self identification to the purpose mobile node;

After C42, purpose mobile node receive the demand signalling that this neighboring mobile node sends, reply signaling to this neighboring mobile node transmission, this neighboring mobile node receives that the purpose mobile node sends reply signaling after, the business information that this is professional sends to the purpose mobile node;

After C43, purpose mobile node receive the business information that this neighboring mobile node sends, send to this neighboring mobile node with carrying the assignment signalling that sends code word and time slot, this neighboring mobile node utilizes the code word and the time slot that are distributed in this assignment signalling that business datum is sent to the purpose mobile node after receiving the assignment signalling that the purpose mobile node sends.

9, method according to claim 1, it is characterized in that, before described base station receives the access request step that the source mobile node sends, further comprise: the source mobile node sends to the base station by the access request that competition uplink random access channel will carry self identification;

When the base station receives the access request that the source mobile node sends, at first judge according to the sign of source mobile node whether it is legal, if legal, then continue to carry out described when this business is local business, the base station judges whether this business is the step of real time business, otherwise, jump out this flow process.

10, method according to claim 1 is characterized in that, after described base station receives the access request step that the source mobile node sends, further comprises: the request of will inserting sends to the source mobile node of base station and monitors broadcast channel;

Described base station indication source and destination mobile node utilizes this channel appointed resource or path to communicate to comprise: the base station utilizes this channel appointed resource or path to communicate by broadcast channel indication source and destination mobile node, the source mobile node listens to this indication from broadcast channel after, send business datum.

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