WO2011026441A1 - 为对讲机分配信道的方法、通信方法、系统和对讲机 - Google Patents
为对讲机分配信道的方法、通信方法、系统和对讲机 Download PDFInfo
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- WO2011026441A1 WO2011026441A1 PCT/CN2010/076629 CN2010076629W WO2011026441A1 WO 2011026441 A1 WO2011026441 A1 WO 2011026441A1 CN 2010076629 W CN2010076629 W CN 2010076629W WO 2011026441 A1 WO2011026441 A1 WO 2011026441A1
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- walkie
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- call
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13098—Mobile subscriber
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13216—Code signals, frame structure
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13349—Network management
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
- H04W16/12—Fixed resource partitioning
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/02—Selection of wireless resources by user or terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/08—Trunked mobile radio systems
Definitions
- the present invention relates to the field of land mobile radio communications (LMR), and more particularly to a method, a communication method, a system and a walkie-talkie for allocating channels for a walkie-talkie.
- LMR land mobile radio communications
- the current low-end walkie-talkie frequency uses prominent problems:
- the communication solution on the market is mainly a conventional communication method, and is also a communication mode mainly used by commercial users at present, that is, a general point-to-point communication mode, which uses a frequency point to communicate mainly by means of group calls.
- a general point-to-point communication mode which uses a frequency point to communicate mainly by means of group calls.
- any one of the intercom terminals in the same area if the same radio frequency carrier and the same sub-tone signaling are satisfied, any machine initiates a call by PTT (Push To Talk, PTT).
- PTT Push To Talk
- the call setup time is long. Since the shared 2M frequency band has a total of 1 control channel and 159 traffic channels, when the traffic is large, the time for searching for the idle channel will be greatly increased, and the time required for call setup is very long.
- the call collision rate is high. Since the centerless call setup command is sent on a unique control channel, when the call is frequent, collisions are likely to occur, resulting in a call failure.
- the channel status misjudgment rate is high. Due to the existence of inter-channel interference and the pause of the call process, it is easy to misjudge when scanning the idle channel, and the busy channel is judged as idle or idle channel.
- the technical problem to be solved by the present invention is to provide a self-addressing communication method applied to the walkie-talkie for the disadvantages of the above-mentioned prior art that the spectrum use efficiency is too low, the anti-interference ability is poor, and the call setup time is long.
- the technical solution adopted by the present invention to solve the technical problem is: constructing a method for allocating a channel for a walkie-talkie, characterized in that it comprises:
- the invention also provides a walkie-talkie, comprising:
- a setting unit configured to obtain corresponding subnet channel resource information according to a subnet to which the interphone belongs, determine a control channel and a service channel that can be used by the interphone; and the number of the service channel is greater than or equal to
- the standby processing unit is configured to wait on the control channel determined by the setting unit during standby.
- the invention also provides a communication method applied to a walkie-talkie, comprising:
- Different channels are divided into two or more subnets, and different subnets include different channels, and each subnet includes a control channel and two or more service channels;
- the interphone obtains corresponding subnet resource information according to the subnet to which the intercom is located, and determines a control channel and a service channel of the interphone;
- the walkie-talkie is waiting on the control channel while in standby; when initiating a call, searching for the traffic channel of the walkie-talkie to establish communication on the idle traffic channel.
- the invention also provides a communication system applied to a walkie-talkie, comprising:
- the subnet includes a control channel and two or more service channels, and different subnets include different channels;
- the walkie-talkie belonging to the same subnet When the walkie-talkie belonging to the same subnet stands by, it waits on the control channel of the same subnet, and when the call is initiated, searches for the traffic channel of the same subnet, and establishes communication on the searched idle traffic channel.
- the technical solution of the present invention is to obtain corresponding subnet resource information according to the subnet to which the interphone belongs, and determine a control channel and a service channel that can be used; different subnets correspond to different channel resources, so that operation is performed in the subnet.
- the walkie-talkie and the intercoms of other sub-networks do not interfere with each other, and different channel resources are used between the sub-networks, thereby avoiding channel interference between different sub-networks, and also avoiding the problem of chaotic channel resource management, preventing users from using the centralized part.
- Frequency band causes communication congestion and frequency band use Inefficiency means reducing the probability of a call collision.
- the walkie-talkies in the subnet are waiting on the control channel during standby, avoiding waste of traffic channel resources and improving channel utilization efficiency. Moreover, by subnetting, the intercom in the same subnet only needs to determine the service channel that can be used in the subnet when calling, and does not need to search all channel resources, thereby shortening the call setup time.
- the communication method and the walkie-talkie of the present invention have the following advantages:
- FIG. 1 is a schematic diagram of a conventional walkie-talkie communication mode
- FIG. 2 is a schematic diagram of a communication mode of a centerless walkie-talkie
- FIG. 3 is a flow chart showing a method of allocating channels for a walkie-talkie in accordance with a preferred embodiment of the present invention
- FIG. 4 is a schematic flow chart of a communication method applied to a walkie-talkie according to an embodiment of the present invention
- FIG. 5 is a schematic diagram of a self-addressed communication call mode
- Figure 6 is a subnet frequency configuration diagram
- Figure 7 is a schematic diagram of frequency reuse
- FIG. 8 is a schematic diagram of a channel configuration method in a zone
- Figure 9 is a schematic diagram of the implementation process of the self-selected call.
- FIG. 11 is a diagram showing an example of channel allocation in a zone
- FIG. 12 is a schematic flowchart of automatically configuring an idle channel in a zone
- 13 is a schematic diagram of a call flow for releasing a traffic channel at the end of a call process
- 14 is a schematic diagram of a call flow of a PTT release or release channel
- FIG. 15 is a schematic diagram of a walkie-talkie call process according to an embodiment of the invention.
- 16 is a schematic diagram of a walkie-talkie call process according to another embodiment of the present invention.
- 17 is a schematic diagram of a walkie-talkie call process according to another embodiment of the present invention.
- FIG. 18 is a schematic structural view of a walkie-talkie according to an embodiment of the invention.
- FIG. 19 is a schematic structural view of a walkie-talkie according to an embodiment of the invention.
- FIG. 20 is a schematic structural view of a walkie-talkie according to another embodiment of the present invention.
- 21 is a flow chart of a communication method applied to a walkie-talkie according to an embodiment of the invention.
- FIG. 22 is a structural diagram of a communication system applied to a walkie-talkie according to an embodiment of the present invention.
- the present invention proposes an embodiment of a method for allocating channels for a walkie-talkie, supporting, for example but not limited to, voice services and data services.
- Step 301 Obtain corresponding subnet resource information according to the subnet to which the interphone belongs, and determine a control channel and a service channel that can be used by the walkie-talkie; the number of the service channels is greater than or equal to 2; different subnets correspond to different channel resources;
- Step 302 Waiting on the control channel during standby.
- the channel resource can be allocated to different subnets, and the walkie-talkie can use the channel resource allocated by the subnet to make the walkie-talkie and other subnets in the subnet.
- the intercoms do not interfere with each other, and different channel resources are used between the subnets to avoid channel interference between different subnets, and also avoids the problem of chaotic channel resource management, preventing users from using part of the frequency band to cause communication congestion and frequency bands. Inefficient use, that is, reduces the probability of a call collision.
- the walkie-talkies in the subnet are waiting on the control channel during standby, avoiding waste of traffic channel resources and improving channel utilization efficiency. And by subnetting, a pair within a subnet The phone only needs to determine the service channel that can be used in the subnet when calling, and does not need to search all channel resources, which shortens the call setup time.
- the subnet set by the exit can be directly used as the subnet to which it belongs, or the subnet information to which the walkie-talkie belongs can be configured.
- the first type searches for the idle subnet; sets the searched free subnet to the subnet to which the radio belongs; when the user uses the intercom, the factory settings may be duplicated with the used subnet nearby. Network, find the idle subnet, and then set the searched idle subnet to the subnet to which the walkie-talkie belongs;
- the second type sets the predetermined subnet as the subnet to which the walkie-talkie belongs.
- the user can also set a subnet according to the known information.
- the walkie-talkie sets the subnet reserved by the user to the subnet to which the user belongs.
- Another method for distributing a channel for a walkie-talkie proposed by the present invention further provides a method for a walkie-talkie to initiate a call:
- the idle traffic channel is released, and the control channel is returned to continue to wait.
- a detailed description of the method by which the walkie-talkie initiates a call can also be seen in FIG.
- the called party receives the call setup request command from the control channel, and obtains the designated service channel number from the received call setup request command. ; thus entering the designated traffic channel, establishing communication with the originating caller.
- the walkie-talkie communicates with at least one other walkie-talkie in the subnet using the channel resources assigned to the subnet to which it belongs; wherein all walkie-talkies of the subnet constitute a user unit, each user unit The corresponding subnets are assigned different numbers, and each subnet is assigned a different channel resource.
- the same subnet number can be reused, where the same subnet number corresponds to the same set of frequencies.
- the frequency resource allocated to each subnet may be divided into multiple channels by using a channel spacing method, and the divided multiple channels represent one frequency set, and then one channel of the multiple channels is set and controlled. Channel, the remaining channels are set to traffic channels.
- the process of frequency resource processing (i.e., processing of channel resources) in the method of allocating channels for the intercom according to another embodiment of the present invention is as follows:
- the frequency resource is divided into NX 1000/M channels by using M (M>0) kHz channel spacing, and each channel represents a frequency point.
- L channels for each subnet and L channels of each subnet represent a frequency set, and the frequency resource of the N MHz is divided into NX 1000/M/L (L>0) subnets,
- the subnet zone number assigned by each user unit is 0 ⁇ NX 1000/M/L-1, and the number of the subnet zone is in one-to-one correspondence with the frequency set assigned to the zone of the subnet.
- the subnet frequency configuration further includes: when the distance between the user units exceeds the reuse distance S (S>0), the same subnet number can be reused, wherein the same subnet number Corresponding to the same set of frequencies, wherein the reuse distance S is determined by the transmit power of the walkie-talkie.
- the frequency set allocated for each subnet zone is a frequency set without third-order intermodulation interference and/or no adjacent channel interference, and different user units use different non-third-order intermodulation.
- a set of frequencies that interfere with and/or have no adjacent channel interference makes the channel state misjudged The rate is greatly reduced, preventing the busy channel from being judged as idle or the idle channel being judged to be busy.
- FIG. 15 is a schematic diagram of a walkie-talkie call process 1500 according to an embodiment of the invention.
- step 1501 the intercom that is waiting on the control channel to initiate a call to at least one called intercom in the subnet to which it belongs, automatically searches for a free traffic channel in the traffic channel; the method of initiating the call includes, for example, pressing the PPT by the user. Press the button to achieve.
- step 1502 switching to the control channel and sending a call command to the called walkie-talkie to notify the called walkie-talkie to switch to the searched idle traffic channel;
- step 1503 communicating with the called walkie-talkie on the traffic channel
- step 1504 after the communication ends, the traffic channel is released and switched to the control channel for the next call.
- Steps 1601-1603 are the same as 1501-1503 in FIG. 15, and the difference is in steps 1604-1606.
- step 1604 when it is detected that the enabled PPT button for initiating the call is in the stopped use state, it is determined whether the call with the called walkie-talkie is over or whether the preset call reset time has expired; if yes, then enter Step 1605; If no, go to step 1606.
- step 1605 the call end command is sent to the called intercom or the call is automatically terminated, and the intercom and the called intercom that initiate the call release the traffic channel and switch to the control channel to wait for the next call.
- step 1606 the intercom and the called intercom that initiated the call still occupy the service channel to continue the call, and the two parties continue to communicate on the traffic channel.
- FIG. 17 is a schematic diagram of a walkie-talkie call process 1700 in accordance with another embodiment of the present invention. Steps 1701-1703 are identical to 1501-1503 in FIG. 15, with the difference being steps 1704-1705.
- step 1704 when the intercom that initiated the call detects that the enabled PPT button for initiating the call is in the stopped state, it sends a call end command to the called intercom or automatically ends the call.
- step 1705 the intercom and the called intercom that initiated the call release the traffic channel and switch to the control channel for the next call.
- the communication method applied to the walkie-talkie includes a subnet frequency configuration 401 and an automatic configuration idle channel 402.
- the method of subnet frequency configuration can be performed as shown in Figure 3.
- the automatic configuration of the idle channel 402 includes: unified channel management in each subnet zone, and automatically allocates idle channels according to service requirements.
- the present invention solves the above problems in conventional mobile communication by adopting a subnet frequency configuration technique and automatically configuring an idle channel technology, and supporting voice services and data services.
- the subnet frequency configuration technology refers to centralized frequency resources and unified configuration.
- Each user unit selects a numbered subnet zone.
- Each subnet zone contains a frequency set without third-order intermodulation interference and no adjacent channel interference.
- the user unit uses different frequency sets without third-order intermodulation interference and no adjacent channel interference;
- the automatic configuration of idle channel technology refers to unified channel management in each subnet zone, and automatically allocates idle channels according to service requirements.
- the subnet frequency configuration is as follows:
- the M (M>0) kHz narrowband technique is used to divide the spectrum resource into N*1000/ within the frequency range of N (N>0) MHz. M channels, each channel representing a frequency point.
- M kHz is 6.25 kHz channel spacing technology (M kHz can also use 12.5 KHZ or 25 KHz or other channel spacing technology), 160 channels and other specific numbers to facilitate the invention to illustrate
- the present invention is not limited to these specific numerals, and it is also possible to set frequency resources of other numbers and the like.
- N 160/L user units are used by the zone.
- Each zone is marked with a channel number (such as Zone).
- the L value is calculated by the Irish formula, and the value is determined by the total amount of users, the average call traffic, the average call time, and the call loss rate. For specific calculation, refer to the following example.
- the subnet number of each subnet corresponds to a frequency set without third-order intermodulation interference and no adjacent channel interference, and the frequency set without third-order intermodulation interference and no adjacent channel interference is internally marked with the channel number, once the zone number is determined.
- the frequency of each channel in the zone is also determined, that is, each channel number in the zone corresponds to a fixed frequency point.
- fj , fk are any three frequencies of the frequency set (fl , f2 , ..., fL). If there is another frequency fx in the set such that the above formula holds, then we call the frequency set have third-order intermodulation interference, and vice versa, the frequency set is no third-order intermodulation interference frequency set.
- a set of frequencies that satisfies both third-order intermodulation interference and non-adjacent channel interference is called a third-order intermodulation interference and no adjacent channel interference frequency set.
- the same subnet Zone number can be reused, as shown in Figure 7.
- the white background is area 1
- the oblique background is area 2
- the same background belongs to the same area
- the same subnet area number uses the same frequency set without third-order intermodulation interference and no adjacent channel interference, subnet zone
- the reuse distance is S km, beyond which the same zone number can be reused.
- the number of channels L (the number of traffic channels is L-1), check the Irish table to get the total traffic capacity of each zone as Y (L-l, B).
- the communication in the zone adopts the automatic configuration of the idle channel technology.
- the specific operation 1200 is performed as follows, as shown in Figure 12:
- Step 1201 The L channels of each subnet are divided into one control channel and L-1 traffic channels, as shown in FIG. 8.
- FIG. 8 it shows Zone 0, Zone 1, Zone 2, Zone 3, Zone 4, Zone 5, Zone 6, Zone 7, Zone 8, Zone 9, Zone 10, ⁇ ⁇ ⁇ , Zone Nl, Zone N o
- each zone's chO is the control channel
- chl ⁇ chL-l Continue to wait for a call on the control channel.
- Step 1204 If the intercom user in the subnet zone initiates a call, the intercom automatically searches for a free channel in the chl ⁇ chL-1 traffic channels.
- Step 1205 The return control channel sends an instruction to notify the called walkie-talkie to switch to the searched searched idle channel for communication.
- Step 1206 After the communication ends, the transmitting and receiving parties simultaneously return to the control channel chO to continue to wait.
- Step 1301 Scan all traffic channels in the user unit until an idle traffic channel is found, and determine the service channel number.
- Step 1302 Initiating a call setup request, carrying the channel number in the setup request command; Step 1303, the call intercom and the called walkie-talkie jointly enter the designated traffic channel; Step 1304, the call intercom and the called walkie-talkie communicate on the designated traffic channel. Interaction (such as voice call information transmission);
- Step 1305 After the PPT is released, it is determined whether the call ends or the preset call reset time has expired. If the call is not over or the call reset time has not expired, the process proceeds to step 1306. If the call is over or the reset time is reached, the process proceeds to step 1307.
- Step 1307 if the call ends or the preset call reset time has expired, the caller is called. Proactively issue a call end command or automatically end the call; the specific call reset time setting can be set according to actual needs;
- Step 1308 After the call originator and the called party release the traffic channel, they jointly return to the control channel for waiting.
- the call processing center will start as follows.
- Step 1401 Scan all traffic channels in the zone until an idle traffic channel is found, and determine the traffic channel number.
- Step 1402 Initiate a call setup request, and carry the channel number in the setup request command.
- Step 1403 The call initiator and the callee jointly enter the traffic channel.
- Step 1404 start call information transmission.
- Step 1405 Release the PTT to complete the call and return to the control channel to wait.
- the user A in FIG. 9 is taken as an example for detailed description (where the control channel identifier is CCH and the traffic channel identifier is TCH): After the user A presses the PTT, the group call to the users B and F is initiated, and the inside of the zone is scanned first. All traffic channels, determining that the idle traffic channel is TCH 1, initiating a group call command in the control channel CCH, notifying users B and F to simultaneously enter the traffic channel TCH 1, thereby initiating call information transmission. After the PPT is released, that is, after the call is completed, the users A, B, and F return to the control channel CCH.
- For user C initiate a group call to users D and E, first scan all traffic channels in the zone, determine that the idle traffic channel is TCH 2, initiate a group call command in the control channel CCH, and notify the user D and E to enter the traffic channel simultaneously. TCH 2, thereby initiating call information transmission. After the PPT is released, that is, after the call is completed, the users C, D, and E return to the control channel CCH.
- the 1MHz frequency can provide 160 communication channels.
- the white background is area 1
- the oblique line background is area 2
- the same background belongs to the same area
- the same subnet zone name uses the same frequency segment
- the reuse distance of the zone is, for example, but not limited to 2 km, beyond the distance
- the same Z 0 ne can be reused.
- the specific values herein are for illustrative purposes only and are not intended to limit the invention.
- the 16 zones can be multiplexed again, that is, 16 user units can be supplied to use the above 1 MHz band content. As shown in Figure 10.
- the 1MHz free frequency point is very good for users and does not interfere with each other.
- FIG. 18 is a schematic structural diagram of a walkie-talkie 1800 according to an embodiment of the invention.
- the walkie-talkie 1800 includes a setting unit 1801 and a standby processing unit 1802.
- the setting unit 1801 is configured to obtain corresponding subnet channel resource information according to the subnet to which the interphone belongs, and determine a control channel and a service channel that can be used by the interphone; the number of the service channels is greater than or equal to 2; Channel resources.
- the standby processing unit 1802 is configured to wait on the control channel determined by the setting unit during standby.
- FIG. 19 is a block diagram showing the structure of a walkie-talkie 1900 according to an embodiment of the invention.
- a subnet searching unit 1803 and a subnet setting unit 1804 are included.
- the subnet search unit 1803 is configured to search for an idle subnet; and set the searched free subnet as a subnet to which the walkie belongs.
- the subnet setting unit 1804 is configured to set a predetermined subnet as a subnet to which the walkie-talkie belongs.
- subnet searching unit 1803 and the subnet setting unit 1804 are shown, in actual use, the two may be selected as one or both, and the present invention does not limit this.
- the illustrations are for illustrative purposes only and are not intended to limit the invention.
- FIG. 20 is a block diagram showing the structure of a walkie-talkie 2000 according to another embodiment of the present invention.
- the walkie-talkie 2000 includes a call originating unit 1805, a first call establishing unit 1806, and a channel releasing unit 1807 in addition to the unit in FIG.
- a call initiation unit 1805 configured to search for the traffic channel to find an idle traffic channel when initiating a call, and send a call setup request command by using the control channel, where the call setup request command carries the idle traffic channel number, Notifying the callee to switch to the idle traffic channel to establish communication;
- the first call establishing unit 1806 is configured to: after the call initiation unit 1805 sends a call setup request command, enter the idle traffic channel to establish communication with the callee;
- the channel release unit 1807 is configured to release the idle traffic channel, and return the control channel to continue to wait.
- the channel release unit 1807 includes a first channel release unit (not shown) for releasing the idle traffic channel after the walkie-talkie PTT button is released, and returning the control channel to continue waiting.
- the channel release unit 1807 includes a second channel release unit. (not shown), for releasing the idle traffic channel after the walkie-talkie PTT button is released and the preset call reset time has elapsed, and returning to the control channel to continue waiting.
- the channel release unit 1807 includes a third channel release unit (not shown) for releasing the idle traffic channel after the communication ends, and returning the control channel to continue waiting.
- the first channel release unit, the second channel release unit, and the third channel release unit may all be included in the walkie-talkie, or may be partially included in the walkie-talkie. When two or all of the intercoms are included, the user can set the first channel release unit, the second channel release unit, and the third channel release unit to complete the channel release action as needed.
- the walkie-talkie in FIGS. 18-20 may further include a second call setup unit.
- FIG. 21 is a flow chart showing a communication method 2100 applied to a walkie-talkie according to an embodiment of the present invention, including:
- Step 2101 Divide different channels into two or more subnets, and different subnets include different channels, and each subnet includes a control channel and two or more service channels.
- Step 2102 Set a subnet to which the intercom is located, and the same intercom with the same subnet belongs to the same user unit;
- Step 2103 The walkie-talkie acquires corresponding subnet resource information according to the subnet to which the intercom is located, and determines a control channel and a service channel of the walkie-talkie;
- Step 2104 The walkie-talkie is waiting on the control channel while in standby; when initiating a call, searching for a traffic channel of the walkie-talkie, establishing communication on the idle traffic channel.
- control channel and the idle channel used by the walkie-talkie in the communication method 2100 of the walkie-talkie are channels having no third-order intermodulation interference and/or no adjacent channel interference with each other.
- FIG. 22 is a schematic structural diagram of a communication system 2200 applied to a walkie-talkie according to an embodiment of the present invention.
- the communication system 2200 includes two or more walkie-talkies (interphone 1, walkie-talkie 2, ..., walkie-talkie n, where n>2), each The walkie-talkie belongs to a subnet, and the subnet includes a control channel and is greater than On two traffic channels, different subnets contain different channels; when the intercoms belonging to the same subnet are in standby, they are waiting on the control channel of the same subnet, and when initiating a call, searching for the service channel of the same subnet, Communication is established on the searched idle traffic channel.
- FIG. 22 is a schematic structural diagram of a communication system 2200 applied to a walkie-talkie according to an embodiment of the present invention.
- the communication system 2200 includes two or more walkie-talkies (interphone 1, walkie-talkie 2, ..., walkie-talkie
- the intercom 1 and the intercom 2 belong to the same subnet 1, and the intercom n belongs to another subnet 2.
- the intercom 1 initiates a call to the intercom 2
- both parties can communicate according to FIG. 21 and its description.
- the walkie-talkie n can communicate with other walkie-talkies that belong to subnet 2.
- the communication system 2200 applied to the walkie-talkie uses the control channel and the idle channel as channels having no third-order intermodulation interference and/or no adjacent channel interference with each other.
- the user unit does not interfere with each other. Users in the same user unit use channels that do not interfere with each other without third-order intermodulation interference and no adjacent channel interference frequencies to ensure call quality.
- a plurality of channels can be allocated in one user unit. For example, in the above embodiment, a user unit has a total of 9 call channels, which is sufficient for a general low-end user to use even when frequently used. Efficiency can also improve channel usage efficiency and avoid channel waste.
- each user unit uses one zone. For example, in the above embodiment, the total number of service channels of the user unit is at most 9, and even in the case of the busiest channel, only 9 channels need to be searched, and the delay Greatly reduced.
- the embodiment of the present invention can technically solve the problem of frequency resource conflict and interference. It solves the biggest problem faced by current walkie-talkie users, and has high spectrum utilization rate, conforms to the international spectrum resource usage norms and trends, and can meet the transition of the terminal walkie-talkie from analog to digital, and greatly meets the user's usage habits, and satisfies the user's quick call. Establish requirements.
- the invention enables the walkie-talkies belonging to different user units to be allocated in different sub-networks, and the walkie-talkies of the same user unit communicate in the same sub-network, and do not interfere with the intercoms of other sub-networks, and use different frequency resources between the sub-networks to avoid
- the channel interference between different subnets also avoids the problem of chaotic frequency resource management, preventing users from using part of the frequency band to cause communication congestion and frequency band use efficiency, that is, reducing the probability of call collision.
- the walkie-talkie establishes a call, it only needs to search for the frequency resources in the subnet, and does not need to search all the frequency resources, thus shortening the time of call setup.
- the communication method and walkie-talkie of the present invention have the following advantages: 1. Improved spectrum utilization; 2 solved channel interference; 3 shortened call setup time; 4 delayed battery usage time; 5 reduced probability of call collision.
- the use of a frequency set without third-order intermodulation interference and no adjacent channel interference can prevent the busy channel from being judged as idle or the idle channel is judged to be busy, so that the channel state misjudgment probability is greatly reduced.
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BR112012004403-6A BR112012004403B1 (pt) | 2009-09-04 | 2010-09-03 | Método para distribuição de canais de interfone, método de comunicação, sistema e interfone. |
US13/389,408 US20120149384A1 (en) | 2009-09-04 | 2010-09-03 | Method for distributing channels for interphone, communication method, system and interphone |
EP10813363.8A EP2475185B1 (en) | 2009-09-04 | 2010-09-03 | Method for distributing channels for interphone, system and radio |
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CN200910189874A CN101765029A (zh) | 2009-09-04 | 2009-09-04 | 应用于对讲机的自选址通信方法 |
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WO2012136004A1 (zh) * | 2011-04-07 | 2012-10-11 | 海能达通信股份有限公司 | 一种实现对讲机远程查询、控制的方法及系统 |
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CN102158769A (zh) * | 2011-04-07 | 2011-08-17 | 海能达通信股份有限公司 | 一种实现对讲机远程查询、控制的方法及系统 |
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Also Published As
Publication number | Publication date |
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CN101951559A (zh) | 2011-01-19 |
BR112012004403A2 (pt) | 2016-03-22 |
US20120149384A1 (en) | 2012-06-14 |
EP2475185B1 (en) | 2023-11-01 |
CN101765029A (zh) | 2010-06-30 |
EP2475185A1 (en) | 2012-07-11 |
BR112012004403B1 (pt) | 2021-03-23 |
AU2010291634B2 (en) | 2014-06-12 |
AU2010291634A1 (en) | 2012-03-01 |
RU2012107857A (ru) | 2013-10-10 |
EP2475185A4 (en) | 2016-10-12 |
RU2497305C1 (ru) | 2013-10-27 |
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