CN113055953A - Communication terminal, handover method, handover system, base station, and storage medium - Google Patents
Communication terminal, handover method, handover system, base station, and storage medium Download PDFInfo
- Publication number
- CN113055953A CN113055953A CN202110152848.6A CN202110152848A CN113055953A CN 113055953 A CN113055953 A CN 113055953A CN 202110152848 A CN202110152848 A CN 202110152848A CN 113055953 A CN113055953 A CN 113055953A
- Authority
- CN
- China
- Prior art keywords
- base station
- communication terminal
- current
- adjacent
- request message
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004891 communication Methods 0.000 title claims abstract description 223
- 238000000034 method Methods 0.000 title claims abstract description 88
- 108091006146 Channels Proteins 0.000 claims abstract description 145
- 230000011664 signaling Effects 0.000 claims abstract description 123
- 238000010586 diagram Methods 0.000 description 16
- 230000005540 biological transmission Effects 0.000 description 8
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a communication terminal, a handover method, a handover system, a base station and a storage medium thereof. The handover method of the communication terminal includes: when a communication terminal carries out communication service under a current base station, judging whether the communication terminal meets handover conditions; if yes, sending a first request message for requesting to provide the optional neighbor stations to the current base station through the current channel; and according to the optional adjacent station information in the reverse channel signaling transmitted by the current base station through the adjacent time slot of the current channel, handing over from the current base station to the adjacent base station. By the method, the communication terminal can request to acquire the adjacent station information at any time to carry out handover.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a communication terminal, a handover method thereof, a system, a base station, and a storage medium.
Background
In a digital trunking communication system, there are a large number of scenarios that require handoff to ensure the signal quality of the current intercom call. In PDT (police digital trunking) or DMR (digital radio communication standard) digital standard, the system broadcasts a neighbor control channel (C _ BCAST) or a traffic channel (P _ BCAST) to the terminal on a control channel or a traffic channel, and the terminal scans neighbor base stations when the current channel signal is degraded during a call after receiving the channel. And judging whether to start the cross-area according to the current signal quality of the terminal and the signal quality of the adjacent station.
However, in practical application, the existing handover technology relies heavily on the broadcast of system neighbor station information, and the terminal needs to scan neighbor stations to determine whether to perform handover after knowing the existence of other neighbor stations after receiving the broadcast of the neighbor stations. The method has obvious defects, namely, in practical application, a terminal has a scene that adjacent station broadcasting cannot be received or is not received, and on the other hand, the load of system channel resources is increased when a large amount of adjacent station broadcasting is carried out.
Disclosure of Invention
The present invention is directed to a communication terminal, a handover method, a system, a base station, and a computer-readable storage medium thereof, which can request to acquire information of an adjacent station at any time to perform handover.
In order to solve the above technical problem, a first aspect of the present invention provides a handover method of a communication terminal, the method including: when a communication terminal carries out communication service under a current base station, judging whether the communication terminal meets handover conditions; if yes, sending a first request message for requesting to provide the optional neighbor stations to the current base station through the current channel; and according to the optional adjacent station information in the reverse channel signaling transmitted by the current base station through the adjacent time slot of the current channel, handing over from the current base station to the adjacent base station.
In order to solve the above technical problem, a second aspect of the present invention provides a handover method of a communication terminal, the method comprising: when a current base station carries out communication service with a communication terminal, receiving a first request message which is sent by the communication terminal through a current channel and requests to provide an optional adjacent station; generating a reverse channel signaling according to the first request message; and transmitting the reverse channel signaling to the communication terminal through the adjacent time slot of the current channel so that the communication terminal is handed over from the current base station to an adjacent base station according to the optional adjacent station information in the reverse channel signaling.
To solve the above technical problem, a third aspect of the present invention provides a communication system, including: at least two base stations, each base station having a communication coverage area; each of said base stations is operable to implement a method of handover of a communication terminal as described above in the second aspect; the at least two communication terminals realize voice communication through the at least two base stations; each of said communication terminals is operable to implement a method of handover of a communication terminal as described above in relation to the first aspect.
To solve the above technical problem, a fourth aspect of the present invention provides a communication terminal, including a communication circuit, a memory, and a processor, which are coupled to each other; the communication circuit is used for communicating with other terminals and base stations; the memory is to store program instructions; the processor executes the program instructions for implementing the handover method of the communication terminal as described above in the first aspect.
To solve the above technical problem, a fifth aspect of the present invention provides a base station, including a communication circuit, a memory and a processor coupled to each other; the communication circuit is used for communicating with other base stations and communication terminals; the memory is to store program instructions; the processor executes the program instructions for implementing the handoff method of the communication terminal as described in the second aspect above.
To solve the above technical problem, a sixth aspect of the present invention provides a computer-readable storage medium having stored thereon program instructions that, when executed by a processor, implement the handover method of a communication terminal according to the first or second aspect.
The invention has the beneficial effects that: different from the situation of the prior art, the method and the device for realizing the handover of the communication terminal judge whether the communication terminal meets the handover condition when the communication terminal carries out communication service under the current base station, send a first request message for requesting to provide the optional adjacent station to the current base station through the current channel when the handover condition is met, and perform handover from the current base station to the adjacent base station according to the optional adjacent station information in the reverse channel signaling transmitted by the current base station through the adjacent time slot of the current channel. By the mode, the reverse channel signaling can be transmitted to the terminal by using the adjacent time slot in the terminal transmitting process according to the PDT/DMR standard, and the transmission mode can not influence the current time slot, so that the reverse channel signaling in the conversation process can send the adjacent station information to the communication terminal in real time in the conversation process, and does not influence the current conversation, so that the communication terminal can realize the handover without depending on the previously received adjacent station information in the conversation process, namely the communication terminal can request and acquire the adjacent station information at any time to perform the handover, and the conversation quality of a user can be better ensured.
Drawings
Fig. 1 is a flowchart illustrating a first embodiment of a handover method of a communication terminal according to the present invention;
FIG. 2 is a schematic diagram of a detailed flowchart of an embodiment of step S13 in FIG. 1;
FIG. 3 is a schematic diagram of a detailed flow chart of an embodiment of step S132 in FIG. 2;
fig. 4 is a schematic structural diagram of a talk burst frame in a first application scenario of the handoff method of the communication terminal according to the present invention;
FIG. 5 is a schematic diagram of a detailed flowchart of another embodiment of step S13 in FIG. 1;
fig. 6 is a flowchart illustrating a handover method of a communication terminal according to a second embodiment of the present invention;
FIG. 7 is a schematic diagram illustrating a detailed flowchart of an embodiment of step S63 in FIG. 6;
fig. 8 is a timing diagram illustrating a second application scenario of the handover method of the communication terminal according to the present invention;
fig. 9 is a schematic structural diagram of an embodiment of a communication system provided in the present invention;
fig. 10 is a schematic structural diagram of an embodiment of a communication terminal provided in the present invention;
fig. 11 is a schematic structural diagram of a base station according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of an embodiment of a computer-readable storage medium provided in the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Referring to fig. 1, fig. 1 is a flowchart illustrating a handover method of a communication terminal according to a first embodiment of the present invention. The handover method of the communication terminal in the present embodiment includes the steps of:
s11: when the communication terminal carries out communication service under the current base station, whether the communication terminal meets handover conditions or not is judged. If the handover condition is satisfied, step S12 is executed, and if the handover condition is not satisfied, it indicates that the communication terminal does not need to perform a handover at this time, and the flow ends.
S12: a first request message requesting provision of an optional neighbor station is transmitted to a current base station through a current channel.
It can be understood that, in the existing communication system, the neighboring station information of the current base station is generally broadcasted to the communication terminal through the control channel (C _ BCAST) signaling or the traffic channel (P _ BCAST) signaling, and the communication terminal stores all the received neighboring station information in the neighboring station list; in the process of receiving voice, if the signal intensity of the current base station channel is lower than a preset value, the communication terminal scans the adjacent station according to the adjacent station information, and if the adjacent station with better signal is found, the communication terminal starts a handover process. It can be found that the existing handover mode depends very much on the broadcast of the adjacent station information of the system, and the communication terminal needs to know the existence of the adjacent station in advance, that is, the communication terminal needs to receive the broadcast adjacent station information in advance and store the information in the adjacent station list, and then scans the adjacent station to judge whether the handover can be performed to the adjacent station; this method has obvious defects, on one hand, in practical application, a communication terminal may have a scene that cannot receive or has not received the neighboring station information broadcast, and on the other hand, a large amount of neighboring station information broadcast increases the load of system channel resources. For example, in the process of using the communication terminal, when the base station is manually switched or restarted, a call may be initiated and be in a call, and at this time, because the adjacent station information broadcast is not received or the adjacent station information is not completely received and is in a transmitting state, the adjacent station information broadcast cannot be received any more, and at this time, the communication terminal cannot start the handover; for example, when the user hands over from the base station a to the base station B while using the communication terminal, the signal of the base station B becomes weak, and the communication terminal cannot perform the hand-over again because the adjacent station information of the B station has not been received before. Therefore, in this embodiment, when the communication terminal performs a communication service in the current base station, if it is determined that the communication terminal itself satisfies the handover condition, the communication terminal may send a first request message requesting to provide the optional neighboring station to the current base station through the current channel, so as to obtain information of the optional neighboring station.
S13: and according to the optional adjacent station information in the reverse channel signaling transmitted by the current base station through the adjacent time slot of the current channel, switching from the current base station to the adjacent base station.
It is understood that the current base station may send the optional neighbor station information to the communication terminal after receiving the first request message sent by the communication terminal requesting to provide the optional neighbor station, so that the communication terminal may perform neighbor station scanning according to the optional neighbor station information, and may perform handover from the current base station to the neighbor base station after finding a better neighbor base station. Because the communication terminal may be in a communication state in the process of receiving the optional neighbor station information, in this embodiment, the current base station transmits the reverse channel signaling to the communication terminal through the neighbor timeslot of the current channel, and the reverse channel signaling may carry the optional neighbor station information, so that the communication terminal obtains the optional neighbor station information. According to the PDT/DMR standard, a Reverse Channel (RC) signaling can realize transmission to a communication terminal by using an adjacent time slot in the transmitting process of the communication terminal, and the transmission mode can not influence the current time slot, so that the optional adjacent station information can be issued to the communication terminal in real time in the conversation process by using the RC Reverse signaling, and the current conversation is not influenced.
In the embodiment, the reverse channel signaling in the conversation process is utilized, the adjacent station information can be sent to the communication terminal in real time in the conversation process, the current conversation is not influenced, the communication terminal can realize the handover without depending on the previously received adjacent station information in the conversation process, namely, the communication terminal can request and acquire the adjacent station information at any time to perform the handover, and the conversation quality of a user can be better ensured.
Referring to fig. 2, fig. 2 is a schematic flowchart illustrating an embodiment of step S13 in fig. 1. In one embodiment, the step S13 includes:
step S131: and receiving reverse channel signaling transmitted by the current base station through the adjacent time slot of the current channel.
Step S132: and judging whether the reverse channel signaling records the optional adjacent station information. If so, step S133 is executed, otherwise, the communication terminal cannot perform handover because the optional neighboring station information is not received, and the process ends.
Step S133: and according to the optional adjacent station information, performing handover from the current base station to the adjacent base station.
It can be understood that, the current base station transmits the reverse channel signaling to the communication terminal through the adjacent time slot of the current channel, after receiving the reverse channel signaling, the communication terminal needs to determine whether the reverse channel signaling records the optional adjacent station information, if the optional adjacent station information is recorded, the communication terminal can scan the adjacent station according to the optional adjacent station information, and if the adjacent station meeting the handover condition is found, the communication terminal can implement the handover.
Referring to fig. 3, fig. 3 is a schematic flowchart illustrating an embodiment of step S132 in fig. 2. In one embodiment, before the reverse channel signaling is encoded integrally, the payload of the reverse channel signaling is encoded separately, specifically, the payload of the reverse channel signaling may be encoded separately by using a hamming code, a convolutional code, a turbo code, or the like; in this case, the step S132 includes:
step S1321: and integrally decoding the reverse channel signaling to obtain the effective payload of the reverse channel signaling.
Step S1322: and independently decoding the payload and judging whether the independent decoding is correct or not. If yes, step S1323 is executed, otherwise, the process is processed according to the original RC signaling flow, and the flow is ended.
Step S1323: and determining that the reverse channel signaling records the optional adjacent station information.
It will be appreciated that the reverse channel signalling and the payload of the reverse channel signalling may be encoded in order to match the information to be transmitted as closely as possible to the transmission channel and to provide some protection of the information from interference. After receiving the reverse channel signaling, the communication terminal firstly carries out integral decoding on the reverse channel signaling to obtain the effective payload of the reverse channel signaling; because the effective payload of the reverse channel signaling is encoded by using a hamming code, a convolutional code, a turbo code and the like, the effective payload needs to be decoded separately by using the hamming code, the convolutional code, the turbo code and the like, and if the separate decoding is correct, the reverse channel signaling is considered to carry the optional neighbor station information.
In one embodiment, the optional neighbor station information includes location area identification codes and channel numbers of the neighboring base stations. Specifically, the current base station transmits a Location Area Identification (LAI) code and a channel number of the selectable neighbor station through the neighbor time slot of the current channel, so that the communication base station can perform field intensity scanning according to the Location Area Identification (LAI) code and the channel number of the selectable neighbor station to realize handover.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a talk burst frame in a first application scenario of a handover method of a communication terminal according to the present invention. In an application scenario, each voice superframe comprises six voice burst frames, an Embedded signaling area of the voice burst frames occupies 48 bits, and is composed of a 16-bit Embedded information field (EMB field for short) and a 32-bit Embedded signaling field, wherein the EMB field is used for preventing co-channel interference, encryption indication, link control start or end, forward error correction and the like; the EMB field contains information such as color code and label, which can be used to indicate whether the embedded signaling field is null or RC signaling. When the embedded signaling domain of the downlink reverse voice burst frame transmission is an RC signaling, the length of the RC signaling is 32 bits, and the effective payload of the RC signaling is 11 bits; in order to distinguish from the existing RC signaling, the present application encodes the payload when broadcasting the optional neighbor information, for example, (7,4) hamming code encoding may be adopted, since the payload of the RC signaling is 11 bits, and the 11 bits are (7,4) hamming code encoding, wherein the effective information bits are 7 bits, 4 bits are check bits, and since a total of 24 bits are required for transmitting a neighbor information containing the location area identification code and the channel number, a total of 4 RC signaling speech frames are required for transmitting a neighbor information. Therefore, in the process of voice call of the communication terminal, after the RC signaling is detected in the adjacent time slot, the RC signaling is decoded according to the existing RC signaling flow, then Hamming code decoding is carried out on the effective load, if the decoding is correct, the RC signaling is considered to carry optional adjacent station information, and if the decoding is wrong, the RC signaling is processed according to the original RC signaling flow.
Referring to fig. 5, fig. 5 is a schematic flowchart illustrating another embodiment of step S13 in fig. 1. In one embodiment, the step S13 includes:
step S131: and detecting and judging whether the field intensity of the adjacent base station meets the handover condition or not according to the optional adjacent station information in the reverse channel signaling transmitted by the current base station through the adjacent time slot of the current channel. If so, step S132 is executed, otherwise, it is described that the communication terminal cannot perform handover to the neighboring base station, and the flow ends.
Step S132: and sending a second request message for requesting to switch to the adjacent base station to the current base station.
Step S133: and after receiving the information of the adjacent base station sent by the current base station, handing over from the current base station to the adjacent base station.
It can be understood that, after receiving the optional neighbor station information in the reverse channel signaling transmitted by the current base station through the neighbor time slot of the current channel, the communication terminal scans the neighbor stations according to the optional neighbor station information, and if the field strength of the neighbor base station satisfies the handoff condition, the communication terminal starts the handoff process; specifically, the communication terminal may send a second request message requesting for handover to the neighboring base station to the current base station after determining that the field strength of the neighboring base station satisfies the handover condition, and the current base station may send the neighboring base station information of the neighboring base station to the communication terminal after receiving the second request message requesting for handover to the neighboring base station sent by the communication terminal, so that the communication terminal may be handed over from the current base station to the neighboring base station.
Further, the information of the neighboring base station sent by the current base station carries the traffic channel and the base station parameter information of the neighboring base station. Specifically, when the communication terminal requests a cell-crossing, the current base station needs to transmit a traffic channel of the neighboring base station and broadcast the base station parameter information of the neighboring base station, and it can be understood that the base station parameter information of the neighboring base station may include detailed information about the neighboring base station, such as a timeslot number, a base station identity code, a system code, and the like, in addition to the location area identity code and the channel number in the optional neighboring station information. In an application scenario, because the current base station needs more data to be transmitted at the moment and the transmission efficiency is low by adopting an RC signaling mode, the detailed information of the adjacent base station can be transmitted by adopting the existing traffic channel mode.
Further, if the communication terminal is in a call state when sending the first request message and/or the second request message to the current base station, the first request message and/or the second request message is an embedded signaling; if the communication terminal is in an idle state when sending the first request message and/or the second request message to the current base station, the first request message and/or the second request message is a signaling sent actively. It is to be understood that when the communication terminal transmits the first request message requesting to provide the optional neighbor station to the current base station or transmits the second request message requesting to switch to the neighbor base station to the current base station, the communication terminal may be in the speaking state or the idle state, and the manner of transmitting the request message to the current base station is different for whether the communication terminal is in the speaking state or not. When the communication terminal is in a call state, the request signal needs to be embedded into a voice frame, and a first request message and/or a second request message are/is sent to the current base station through embedded signaling; when the communication terminal is in an idle state, no communication terminal sends voice, and the first request message and/or the second request message can be sent to the current base station through actively sent signaling.
Referring to fig. 6, fig. 6 is a flowchart illustrating a handover method of a communication terminal according to a second embodiment of the present invention. The handover method of the communication terminal in the present embodiment includes the steps of:
s61: when the current base station carries out communication service with the communication terminal, a first request message which is sent by the communication terminal through a current channel and requests to provide the optional adjacent station is received.
S62: reverse channel signaling is generated based on the first request message.
S63: and transmitting the reverse channel signaling to the communication terminal through the adjacent time slot of the current channel, so that the communication terminal is handed over from the current base station to the adjacent base station according to the optional adjacent station information in the reverse channel signaling.
It can be understood that, when the communication terminal performs a communication service under the current base station, if it is determined that the communication terminal itself satisfies the handover condition, the communication terminal sends a first request message requesting to provide the optional neighboring station to the current base station through the current channel, so as to obtain information of the optional neighboring station. At this time, the current base station may receive a first request message requesting to provide an optional neighboring station, which is sent by the communication terminal through the current channel, after receiving the first request message, the current base station may generate a reverse channel signaling according to the first request message, and then the current base station may transmit the reverse channel signaling to the communication terminal through the neighboring time slot of the current channel, so that the communication terminal may obtain the optional neighboring station information in the reverse channel signaling, and then the communication terminal may perform neighboring station scanning according to the optional neighboring station information, and may perform handoff from the current base station to the neighboring base station after finding the neighboring base station with better signal. Because the communication terminal may be in a communication state in the process of receiving the optional neighbor station information, in this embodiment, the current base station transmits the reverse channel signaling to the communication terminal through the neighbor timeslot of the current channel, and the reverse channel signaling may carry the optional neighbor station information, so that the communication terminal obtains the optional neighbor station information.
In the embodiment, the reverse channel signaling in the conversation process is utilized, the adjacent station information can be sent to the communication terminal in real time in the conversation process, the current conversation is not influenced, the communication terminal can realize the handover without depending on the previously received adjacent station information in the conversation process, namely, the communication terminal can request and acquire the adjacent station information at any time to perform the handover, and the conversation quality of a user can be better ensured.
In one embodiment, the step S62 includes: the effective payload of the reverse channel signaling is coded separately, and then the reverse channel signaling is coded integrally to obtain the reverse channel signaling. Specifically, the payload of the reverse channel signaling may be separately encoded using a hamming code, a convolutional code, a turbo code, or the like. It will be appreciated that the reverse channel signalling and the payload of the reverse channel signalling may be encoded in order to match the information to be transmitted as closely as possible to the transmission channel and to provide some protection of the information from interference.
In one embodiment, the optional neighbor station information includes location area identification codes and channel numbers of the neighboring base stations. Specifically, the current base station transmits a Location Area Identification (LAI) code and a channel number of the selectable neighbor station through the neighbor time slot of the current channel, so that the communication base station can perform field intensity scanning according to the Location Area Identification (LAI) code and the channel number of the selectable neighbor station to realize handover.
Referring to fig. 7, fig. 7 is a schematic flowchart illustrating an embodiment of step S63 in fig. 6. In one embodiment, the step S63 includes:
step S631: reverse channel signaling is transmitted to the communication terminal through the adjacent time slot of the current channel.
Step S632: and receiving a second request message which is sent by the communication terminal and requests to switch to the adjacent base station.
Step S633: and sending the adjacent base station information to the communication terminal according to the second request message so as to enable the communication terminal to be handed over from the current base station to the adjacent base station.
It can be understood that the current base station can transmit a reverse channel signaling to the communication terminal through the adjacent time slot of the current channel, and the communication terminal can scan the adjacent station according to the optional adjacent station information after receiving the optional adjacent station information, and can start the handover process if the field strength of the adjacent base station meets the handover condition; specifically, the communication terminal may send a second request message requesting for handover to the neighboring base station to the current base station after determining that the field strength of the neighboring base station satisfies the handover condition, and the current base station may send the neighboring base station information of the neighboring base station to the communication terminal after receiving the second request message requesting for handover to the neighboring base station sent by the communication terminal, so that the communication terminal may be handed over from the current base station to the neighboring base station.
Further, the information of the neighboring base station sent by the current base station carries the traffic channel and the base station parameter information of the neighboring base station. Specifically, when the communication terminal requests a cell-crossing, the current base station needs to transmit a traffic channel of the neighboring base station and broadcast the base station parameter information of the neighboring base station, and it can be understood that the base station parameter information of the neighboring base station may include detailed information about the neighboring base station, such as a timeslot number, a base station identity code, a system code, and the like, in addition to the location area identity code and the channel number in the optional neighboring station information. In an application scenario, because the current base station needs more data to be transmitted at the moment and the transmission efficiency is low by adopting an RC signaling mode, the detailed information of the adjacent base station can be transmitted by adopting the existing traffic channel mode.
Further, if the communication terminal is in a call state when sending the first request message and/or the second request message to the current base station, the first request message and/or the second request message is an embedded signaling; if the communication terminal is in an idle state when sending the first request message and/or the second request message to the current base station, the first request message and/or the second request message is a signaling sent actively. It is to be understood that when the communication terminal transmits the first request message requesting to provide the optional neighbor station to the current base station or transmits the second request message requesting to switch to the neighbor base station to the current base station, the communication terminal may be in the speaking state or the idle state, and the manner of transmitting the request message to the current base station is different for whether the communication terminal is in the speaking state or not. When the communication terminal is in a call state, the request signal needs to be embedded into a voice frame, and a first request message and/or a second request message are/is sent to the current base station through embedded signaling; when the communication terminal is in an idle state, no communication terminal sends voice, and the first request message and/or the second request message can be sent to the current base station through actively sent signaling.
Referring to fig. 8, fig. 8 is a timing diagram illustrating a second application scenario of the handover method of the communication terminal according to the present invention. In an application scenario, when a communication terminal applies for neighbor station information from a current base station, according to a standard definition, in an active signaling P _ reset or an embedded signaling P _ EMSU _ reset, when a tag FLAG is 0, it indicates that the communication terminal requests the current base station to give information of an optional neighbor station, when the tag FLAG is 1, it indicates that the communication terminal applies for switching to a specified neighbor station, and may also use a reserved field RSVD in the active signaling P _ reset or the embedded signaling P _ EMSU _ reset, when the reserved field RSVD is 1, the current base station transmits the neighbor station information in an RC signaling manner, and when the reserved field RSVD is 0, the neighbor station information is transmitted in an existing traffic channel P _ BCAST manner. Specifically, the handover procedure of the communication terminal may include: the method comprises the steps that a mobile terminal MS is under a current cell base station BS1 and in a call, if the mobile terminal MS is weak in signal, the mobile terminal MS judges that the mobile terminal MS meets a handover starting condition, at the moment, the mobile terminal MS actively sends an active signaling P _ RESLECT or an embedded signaling P _ EMSU _ RESLECT to a current cell base station BS1 to apply for adjacent station information, at the moment, a FLAG is 0 and a reserved field RSVD is 1 in the signaling, namely, the mobile terminal MS requests a current cell base station BS1 to give information of a selectable adjacent station, and the current cell base station BS1 needs to transmit the information of the selectable adjacent station to the mobile terminal MS in an RC signaling mode; then, the current cell base station BS1 transmits an RC signaling to the mobile terminal MS through the adjacent time slot of the current channel, because the RC signaling carries optional adjacent station information, such as a location area identifier and a channel number of the adjacent cell base station BS2, the mobile terminal MS can scan the adjacent station to detect the field strength of the adjacent cell base station BS2, if the field strength of the adjacent cell base station BS2 meets the handover condition, the mobile terminal MS sends an active signaling P _ reset or an embedded signaling P _ EMSU _ reset to the current cell base station BS1 to apply for handover to the adjacent cell base station BS2, at this time, the signaling FLAG is 1 and the field RSVD is reserved 0, that is, the mobile terminal MS applies for handover to the designated adjacent station, and the current cell base station BS1 needs to transmit detailed parameter information of the adjacent cell base station BS2 to the mobile terminal MS in a service channel P _ BCAST manner; the current cell base station BS1 then sends traffic channel signaling to the mobile terminal MS and broadcasts the specific parameters of the neighboring cell base station BS2 informing the mobile terminal MS to switch to the neighboring cell base station BS2, whereupon the mobile terminal MS can complete the handover.
Referring to fig. 9, fig. 9 is a schematic structural diagram of a communication system according to an embodiment of the present invention. The communication system can be a Digital Mobile Radio (DMR) system, a terrestrial Trunked Radio (TETRA) system, a police Trunked system, or the like; the communication system in the present application includes at least two base stations 901 and at least two communication terminals 902, each base station 901 has a communication coverage area, at least two communication terminals 902 implement voice communication through at least two base stations 901, each base station 901 implements any of the above-mentioned handoff methods when operating, and each communication terminal 902 implements any of the above-mentioned handoff methods when operating.
For details of the embodiment of the communication system provided in the present application, please refer to the detailed description of the embodiment of the handover method of the communication terminal.
Referring to fig. 10, fig. 10 is a schematic structural diagram of a communication terminal according to an embodiment of the present invention. The communication terminal 10 in the present application comprises a communication circuit 100, a memory 102 and a processor 104 coupled to each other; the communication circuit 800 is used for communicating with a base station and other terminals; the memory 102 is used to store program instructions; the processor 104 executes the program instructions for implementing any of the above-described methods of handoff of a communication terminal.
Referring to fig. 11, fig. 11 is a schematic structural diagram of a base station according to an embodiment of the present invention. The base station 11 in the present application comprises a communication circuit 110, a memory 112 and a processor 114 coupled to each other; the communication circuit 110 is used for communication with other base stations and communication terminals; the memory 112 is used to store program instructions; the processor 114 executes the program instructions for implementing any of the above-described handoff methods for a communication terminal.
Specifically, the processor 104 is configured to control itself and the memory 102 to implement the steps in any of the above-described embodiments of the handover method for a communication terminal, and the processor 114 is configured to control itself and the memory 112 to implement the steps in any of the above-described embodiments of the handover method for a communication terminal. Processor 104 and processor 114 may also be referred to as CPUs (Central Processing units). The processor 104 and the processor 114 may be integrated circuit chips having signal processing capabilities. The Processor 104 and the Processor 114 may also be general purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. Additionally, the processor 104 and the processor 114 may be implemented collectively by an integrated circuit chip.
For the detailed description of the embodiments of the communication terminal and the embodiments of the base station, please refer to the above-mentioned detailed description of the embodiments of the handover method of the communication terminal.
Referring to fig. 12, fig. 12 is a schematic structural diagram of an embodiment of a computer-readable storage medium according to the present invention. The computer readable storage medium 12 in the present application has stored therein program instructions 120, the program instructions 120 being executable to implement the handoff method of the communication terminal as described above. The computer readable storage medium 120 may be a storage chip in a communication terminal, a readable and writable tool such as an SD card, or a communication terminal.
In the method and the device, the reverse channel signaling in the call process is utilized, the adjacent station information can be sent to the communication terminal in real time in the call process, the current call is not influenced, the communication terminal can realize the handover without depending on the previously received adjacent station information in the call process, namely the communication terminal can request and acquire the adjacent station information at any time to perform the handover, and the call quality of a user can be better ensured.
In the several embodiments provided in the present application, it should be understood that the disclosed method, terminal, system, base station, server and apparatus may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a module or a unit is merely one type of logical division, and an actual implementation may have another division, for example, a unit or a component may be combined or integrated with another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some interfaces, and may be in an electrical, mechanical or other form.
Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on network elements. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Claims (16)
1. A method for handoff of a communication terminal, the method comprising:
when a communication terminal carries out communication service under a current base station, judging whether the communication terminal meets handover conditions;
if yes, sending a first request message for requesting to provide the optional neighbor stations to the current base station through the current channel;
and according to the optional adjacent station information in the reverse channel signaling transmitted by the current base station through the adjacent time slot of the current channel, handing over from the current base station to the adjacent base station.
2. The handoff method of claim 1 wherein said step of handing off from said current base station to a neighboring base station based on optional neighboring station information in reverse channel signaling transmitted by said current base station through a neighboring time slot of said current channel comprises:
receiving a reverse channel signaling transmitted by the current base station through the adjacent time slot of the current channel;
judging whether the reverse channel signaling records optional adjacent station information or not;
and if so, handing over from the current base station to the adjacent base station according to the optional adjacent station information.
3. The handover method of claim 2, wherein a payload of the reverse channel signaling is separately encoded before the reverse channel signaling is encoded as a whole;
the step of judging whether the reverse channel signaling records the optional neighbor station information includes:
integrally decoding the reverse channel signaling to obtain an effective payload of the reverse channel signaling;
independently decoding the effective payload and judging whether the independent decoding is correct or not;
if yes, determining that the reverse channel signaling records the optional adjacent station information.
4. The handover method of claim 1, wherein the optional neighbor station information comprises a location area identification code and a channel number of the neighbor base station.
5. The handoff method of claim 1 wherein said step of handing off from said current base station to a neighboring base station based on optional neighboring station information in reverse channel signaling transmitted by said current base station through a neighboring time slot of said current channel comprises:
detecting and judging whether the field intensity of the adjacent base station meets the handover condition or not according to the optional adjacent station information in the reverse channel signaling transmitted by the current base station through the adjacent time slot of the current channel;
if yes, sending a second request message for requesting to switch to the adjacent base station to the current base station;
and after receiving the information of the adjacent base station sent by the current base station, handing over from the current base station to the adjacent base station.
6. The handover method of claim 5, wherein the neighbor base station information sent by the current base station carries traffic channel and base station parameter information of the neighbor base station.
7. The handover method according to claim 1 or 5,
if the communication terminal is in a call state when the first request message and/or the second request message are sent to the current base station, the first request message and/or the second request message are/is embedded signaling;
if the communication terminal is in an idle state when sending the first request message and/or the second request message to the current base station, the first request message and/or the second request message is an actively sent signaling.
8. A method for handoff of a communication terminal, the method comprising:
when a current base station carries out communication service with a communication terminal, receiving a first request message which is sent by the communication terminal through a current channel and requests to provide an optional adjacent station;
generating a reverse channel signaling according to the first request message;
and transmitting the reverse channel signaling to the communication terminal through the adjacent time slot of the current channel so that the communication terminal is handed over from the current base station to an adjacent base station according to the optional adjacent station information in the reverse channel signaling.
9. The handoff method of claim 8 wherein said step of generating reverse channel signaling based on said first request message comprises:
and firstly, carrying out independent coding on the effective payload of the reverse channel signaling, and then carrying out integral coding on the reverse channel signaling to obtain the reverse channel signaling.
10. The handover method of claim 8, wherein the optional neighbor station information comprises a location area identification code and a channel number of the neighbor base station.
11. The handoff method of claim 8 wherein said step of transmitting said reverse channel signaling to said communication terminal via an adjacent time slot of said current channel to cause said communication terminal to handoff from said current base station to an adjacent base station based on optional adjacent station information in said reverse channel signaling comprises:
transmitting the reverse channel signaling to the communication terminal through a neighbor time slot of the current channel;
receiving a second request message which is sent by the communication terminal and requests to switch to the adjacent base station;
and sending adjacent base station information to the communication terminal according to the second request message so as to enable the communication terminal to be handed over from the current base station to the adjacent base station.
12. The handover method according to claim 8 or 11,
if the communication terminal is in a call state when the first request message and/or the second request message are sent to the current base station, the first request message and/or the second request message are/is embedded signaling;
if the communication terminal is in an idle state when sending the first request message and/or the second request message to the current base station, the first request message and/or the second request message is an actively sent signaling.
13. A communication system, comprising:
at least two base stations, each base station having a communication coverage area; each of said base stations being operable to implement a method as claimed in any one of claims 8 to 12;
the at least two communication terminals realize voice communication through the at least two base stations; each of said communication terminals being operative to implement the method of any of claims 1-7.
14. A communication terminal, characterized in that the communication terminal comprises a communication circuit, a memory and a processor coupled to each other; the communication circuit is used for communicating with other terminals and base stations; the memory is to store program instructions; the processor executes the program instructions for implementing the method of any one of claims 1-7.
15. A base station, characterized in that the base station comprises communication circuitry, a memory and a processor coupled to each other; the communication circuit is used for communicating with other base stations and communication terminals; the memory is to store program instructions; the processor executes the program instructions for implementing the method of any one of claims 8-12.
16. A computer readable storage medium having stored thereon program instructions, which when executed by a processor implement the method of any of claims 1 to 7, or the method of any of claims 8 to 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110152848.6A CN113055953B (en) | 2021-02-03 | 2021-02-03 | Communication terminal, handover method, system, base station and storage medium thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110152848.6A CN113055953B (en) | 2021-02-03 | 2021-02-03 | Communication terminal, handover method, system, base station and storage medium thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113055953A true CN113055953A (en) | 2021-06-29 |
| CN113055953B CN113055953B (en) | 2023-10-24 |
Family
ID=76508691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110152848.6A Active CN113055953B (en) | 2021-02-03 | 2021-02-03 | Communication terminal, handover method, system, base station and storage medium thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113055953B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113660074A (en) * | 2021-08-20 | 2021-11-16 | 广州慧睿思通科技股份有限公司 | Reverse channel signaling coding and decoding method, device, equipment and storage medium |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1212593A (en) * | 1997-08-28 | 1999-03-31 | 摩托罗拉公司 | Method of providing subscriber unit with neighbor cell information during ongoing communication |
| CN101304592A (en) * | 2008-06-24 | 2008-11-12 | 华为技术有限公司 | Method, system and terminal for transmitting neighboring area list |
| CN101516122A (en) * | 2009-02-27 | 2009-08-26 | 华为技术有限公司 | Neighboring area information sending method and devices therefor |
| WO2009127105A1 (en) * | 2008-04-16 | 2009-10-22 | 中兴通讯股份有限公司 | A reporting method and a reporting mechanism configuration method for the pilot in the traditional group call |
| US20110051660A1 (en) * | 2009-08-28 | 2011-03-03 | Research In Motion Limited | Method and system for acquisition of neighbour cell information |
| CN108200614A (en) * | 2017-12-26 | 2018-06-22 | 哈尔滨海能达科技有限公司 | Method, system and the terminal of selection neighboring station in a kind of digital cluster system |
| CN110830921A (en) * | 2018-08-08 | 2020-02-21 | 成都鼎桥通信技术有限公司 | Method and equipment for transmitting cell information in narrow-band digital trunking system |
| CN111787589A (en) * | 2020-07-15 | 2020-10-16 | 哈尔滨海能达科技有限公司 | Transmission handover method, related equipment and communication system |
-
2021
- 2021-02-03 CN CN202110152848.6A patent/CN113055953B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1212593A (en) * | 1997-08-28 | 1999-03-31 | 摩托罗拉公司 | Method of providing subscriber unit with neighbor cell information during ongoing communication |
| US5987332A (en) * | 1997-08-28 | 1999-11-16 | Motorola, Inc. | Method of providing a subscriber unit with neighbor cell information during ongoing communication |
| WO2009127105A1 (en) * | 2008-04-16 | 2009-10-22 | 中兴通讯股份有限公司 | A reporting method and a reporting mechanism configuration method for the pilot in the traditional group call |
| CN101304592A (en) * | 2008-06-24 | 2008-11-12 | 华为技术有限公司 | Method, system and terminal for transmitting neighboring area list |
| CN101516122A (en) * | 2009-02-27 | 2009-08-26 | 华为技术有限公司 | Neighboring area information sending method and devices therefor |
| US20110051660A1 (en) * | 2009-08-28 | 2011-03-03 | Research In Motion Limited | Method and system for acquisition of neighbour cell information |
| CN108200614A (en) * | 2017-12-26 | 2018-06-22 | 哈尔滨海能达科技有限公司 | Method, system and the terminal of selection neighboring station in a kind of digital cluster system |
| CN110830921A (en) * | 2018-08-08 | 2020-02-21 | 成都鼎桥通信技术有限公司 | Method and equipment for transmitting cell information in narrow-band digital trunking system |
| CN111787589A (en) * | 2020-07-15 | 2020-10-16 | 哈尔滨海能达科技有限公司 | Transmission handover method, related equipment and communication system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113660074A (en) * | 2021-08-20 | 2021-11-16 | 广州慧睿思通科技股份有限公司 | Reverse channel signaling coding and decoding method, device, equipment and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113055953B (en) | 2023-10-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2315667C (en) | Method of automatically reconnecting a dropped call in a mobile communication system | |
| KR101114175B1 (en) | Method for transmitting and receiving point-to-multipoint service in mobile communication system | |
| CN101998664B (en) | Method, system and equipment for reestablishing radio resource control connection | |
| US20100165836A1 (en) | Technique for Handling Radio Link Failure in a Communication Network | |
| US20070041343A1 (en) | Apparatus, method and computer program product providing simultaneous radio resource and service requests | |
| CN107306386B (en) | Method for triggering terminal roaming by access point and access point | |
| JP6457088B2 (en) | Method and apparatus for verifying system information | |
| US20070248053A1 (en) | Method and arrangement for controlling cell change and a terminal of a cellular system | |
| US20110064053A1 (en) | Handover management method in wireless communication system | |
| US20080220766A1 (en) | Method for Control of Radio Measurements in a Cellular Mobile Radio Communication System | |
| US11044734B2 (en) | Beam indication method, network device, and terminal | |
| US20180294931A1 (en) | System and method of processing antenna configuration information | |
| JP4433152B2 (en) | Method of handover in a multi-mode telecommunications network | |
| KR100860668B1 (en) | Apparatus and method for preventing of call drop in mobile communication system | |
| CN113055953B (en) | Communication terminal, handover method, system, base station and storage medium thereof | |
| US20210329519A1 (en) | Cell Connection Processing Method and Mobile Terminal | |
| TWI488514B (en) | Method of cell reselection for a mobile communication system and related mobile device | |
| US20120094671A1 (en) | Method and system for relocation | |
| JP2023537569A (en) | Wireless communication method, terminal device and network device | |
| CN111787589A (en) | Transmission handover method, related equipment and communication system | |
| CN108235826B (en) | CSFB (Circuit switched Fall Back) fall result detection method and device and computer storage medium | |
| US11812270B2 (en) | Method for identifying pseudo base station, apparatus, and mobile terminal | |
| US20100178918A1 (en) | Methods and Apparatus For Mobile Initiated Reselection In A Communication Network | |
| US9426696B2 (en) | Methods, apparatuses, system, related computer program product for handover procedures | |
| CN112673662B (en) | Pseudo base station identification method, pseudo base station identification device, mobile terminal and storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |