CN109756894B - High-definition voice call method, base station and terminal - Google Patents
High-definition voice call method, base station and terminal Download PDFInfo
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Abstract
The embodiment of the invention provides a high-definition voice call method, a base station and a terminal, wherein the method is applied between the base station and the terminal; the method comprises the following steps: when the base station receives a high-definition voice data radio bearer establishment request, the base station allocates an air interface data radio bearer ID for the high-definition voice data radio bearer; judging whether the next air interface data radio bearer ID of the air interface data radio bearer ID is turned over; if not, establishing high-definition voice data radio bearer between the base station and the terminal based on the air interface data radio bearer ID; and the base station carries out high-definition voice call with the terminal through the high-definition voice data wireless bearer. The embodiment of the invention adopts a set of brand-new air interface drbid allocation algorithm, which not only meets the requirement of the air interface data security of the LTE protocol, but also ensures the data security of the VoLTE call of the user.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a high-definition voice call method, a base station and a terminal.
Background
High definition Voice calls, also known as VoLTE calls, are a Voice technology, VoLTE is an abbreviation of Voice over LTE, and translation is the transmission of audio over the LTE network. VoLTE is an IMS (IP Multimedia Subsystem) based voice service. The IMS becomes a core network standard architecture in the all-IP era because it supports multiple accesses and rich multimedia services. After the development and maturity of the last years, IMS has crossed the valley, becoming the mainstream choice for the improvement of fixed Voice domain, Voice Over Broadband (Broadband Voice), PSTN (Public Switched telephone network) network, and also being determined as the standard architecture of mobile Voice by 3GPP, GSMA. VoLTE is an IP data transmission technology, a 2G/3G network is not needed, all services are borne on a 4G network, and the unification of data and voice services in the same network can be realized.
In the prior art, it is necessary to allocate drbid (Data Radio Bear ID, air interface Data Radio bearer ID) and establish an air interface bearer before VoLTE call, and the LTE protocol defines that the value range of the air interface drbid is 3 to 32, so that drbid (repeated drbid) that has been allocated before is definitely allocated when the LTE protocol is continuously reallocated, which is considered that the drbid is turned over. According to the LTE protocol, in order to ensure the safety of air interface data, the terminal allocates the same drbid in a connection state and needs to update the value of the security key, so that when the drbid allocation at the base station side is turned over, an intra-cell switching process is triggered to reallocate the security key, and the allocated security key and the VoLTE bearer are sent to the terminal by an air interface reconfiguration message.
In the prior art, switching in a cell and a VoLTE bearer are established in an air interface reconfiguration message for transmission, and part of commercial terminals supporting VoLTE in the market do not support the air interface signaling, which can cause air interface reconfiguration failure, further cause VoLTE call failure and influence user experience.
Some manufacturers use drbid allocated by fixed VoLTE bearer to solve the above problem, so that a switching process in a cell is not triggered, and successful establishment of VoLTE bearer is guaranteed, but the mechanism does not meet the requirement of an LTE protocol on air interface data security, and data security hidden danger exists.
Disclosure of Invention
In view of the foregoing problems, embodiments of the present invention provide a method, a base station, and a terminal for high-definition voice call.
In order to solve the above problems, the embodiment of the present invention discloses a method for high definition voice communication, which is applied between a base station and a terminal; the method comprises the following steps:
when the base station receives a high-definition voice data radio bearer establishment request, the base station allocates an air interface data radio bearer ID for the high-definition voice data radio bearer;
judging whether the next air interface data radio bearer ID of the air interface data radio bearer ID is turned over;
if not, establishing high-definition voice data radio bearer between the base station and the terminal based on the air interface data radio bearer ID;
and the base station carries out high-definition voice call with the terminal through the high-definition voice data wireless bearer.
Preferably, the step of establishing a high-definition voice data radio bearer between the base station and the terminal based on the air interface data radio bearer ID includes:
acquiring a security key in use by the base station;
establishing a high-definition voice data wireless bearer between the base station and the terminal by adopting the safety key and the air interface data wireless bearer ID;
the base station carries out high-definition voice call with the terminal through the high-definition voice data wireless bearer, and the method comprises the following steps:
and the base station carries out high-definition voice call with the terminal by using the safety key and the high-definition voice data wireless bearer.
Preferably, the method further comprises:
if the next empty data radio bearer ID of the empty data radio bearer ID is turned over, establishing a high-definition voice data radio bearer between the base station and the terminal based on the empty data radio bearer ID, and sending an intra-cell switching reconfiguration message to the terminal by the base station; the reconfiguration message comprises a new security key that is not used by the base station;
and after the reconfiguration of the terminal is completed, the base station uses the new security key and the high-definition voice data wireless bearer to carry out high-definition voice communication with the terminal.
Preferably, the base station air interface data radio bearer ID has a status identifier, where the status identifier includes an idle unused security key, an idle used security key, and an allocated used security key;
the step of judging whether the next air interface data radio bearer ID of the air interface data radio bearer ID is turned over includes:
acquiring the state identifier of the radio bearer ID of the next air interface data;
if the status identifier of the next air interface data radio bearer ID is idle and the used security key is used, and the number of the air interface data radio bearer IDs whose status identifiers are idle and not using the security key in the base station is less than or equal to the preset value,
or when the state identifier of the next air interface data radio bearer ID is the allocated used security key, and the number of the air interface data radio bearer IDs of which all state identifiers are idle and which do not use the security key in the base station is less than or equal to a preset value, determining that the next air interface data radio bearer ID of the air interface data radio bearer ID is turned over.
Preferably, the method further comprises:
and the base station updates the state identifications of all idle air interface data radio bearer IDs with the state identifications of idle used security keys into idle unused security keys.
The embodiment of the invention also discloses a method for high-definition voice communication, which is applied between the base station and the terminal; the method comprises the following steps:
the terminal sends a high-definition voice data radio bearer establishment request to the base station; the base station is used for allocating an air interface data radio bearer ID to the high-definition voice data radio bearer, judging whether the next air interface data radio bearer ID of the air interface data radio bearer ID is overturned, and if not, sending a high-definition voice data radio bearer establishment signaling to the terminal through the air interface data radio bearer ID by the base station;
the terminal receives the high-definition voice data radio bearer establishment signaling;
the terminal establishes a high-definition voice data wireless bearer according to the high-definition voice data wireless bearer establishing signaling, and sends a result of completing the establishment of the high-definition voice data wireless bearer to the base station;
and the terminal and the base station carry out high-definition voice communication through the high-definition voice data wireless bearer.
Preferably, when the radio bearer ID of the next air interface data of the air interface data radio bearer ID is turned over, the method further includes:
the terminal receives an intra-cell switching reconfiguration message sent by the base station; the reconfiguration message comprises a new security key that is not used by the terminal;
the terminal updates the used security key by adopting the new security key and sends the updated result to the base station;
and the terminal uses the new safety key and the high-definition voice data wireless bearer to carry out high-definition voice communication with the base station.
Correspondingly, the embodiment of the invention discloses a base station, which communicates with a terminal; the base station comprises:
the allocation module is used for allocating an air interface data radio bearer ID to the high-definition voice data radio bearer when a high-definition voice data radio bearer establishment request is received;
the judging module is used for judging whether the next air interface data radio bearer ID of the air interface data radio bearer ID is overturned;
a first establishing module, configured to establish a high-definition voice data radio bearer between the base station and the terminal based on the air interface data radio bearer ID;
and the first communication module is used for carrying out high-definition voice communication with the terminal through the high-definition voice data wireless bearer.
Preferably, the first establishing module includes:
a key obtaining submodule, configured to obtain a security key being used by the base station;
a radio bearer establishing submodule, configured to establish a high-definition voice data radio bearer between the base station and the terminal by using the security key and the air interface data radio bearer ID;
the first communication module is further used for carrying out high-definition voice call with the terminal by using the safety secret key and the high-definition voice data wireless bearer.
Preferably, the base station further includes:
a second establishing module, configured to establish a high-definition voice data radio bearer between the base station and the terminal based on the empty data radio bearer ID if a next empty data radio bearer ID of the empty data radio bearer ID is flipped, and send an intra-cell handover reconfiguration message to the terminal by the base station; the reconfiguration message comprises a new security key that is not used by the base station;
and the first communication module is also used for carrying out high-definition voice communication between the base station and the terminal by using the new security key and the high-definition voice data radio bearer after the reconfiguration of the terminal is completed.
Preferably, the base station air interface data radio bearer ID has a status identifier, where the status identifier includes an idle unused security key, an idle used security key, and an allocated used security key;
the judging module comprises:
a status identifier obtaining submodule, configured to obtain a status identifier of the next air interface data radio bearer ID;
a determining submodule, configured to, if the status identifier of the next air interface data radio bearer ID is idle and the used security key is used, and the number of air interface data radio bearer IDs whose status identifiers are idle and the security key is not used in the base station is less than or equal to a preset value,
or when the state identifier of the next air interface data radio bearer ID is the allocated used security key, and the number of the air interface data radio bearer IDs of which all state identifiers are idle and which do not use the security key in the base station is less than or equal to a preset value, determining that the next air interface data radio bearer ID of the air interface data radio bearer ID is turned over.
Preferably, the base station further includes:
and the first updating module is used for updating the state identifications of all idle air interface data radio bearer IDs of which the state identifications are idle and use the security keys into idle unused security keys.
Correspondingly, the embodiment of the invention also discloses a terminal, which communicates with the base station; the terminal comprises:
the sending module is used for sending a high-definition voice data radio bearer establishment request to the base station; the base station is used for allocating an air interface data radio bearer ID to the high-definition voice data radio bearer, judging whether the next air interface data radio bearer ID of the air interface data radio bearer ID is overturned, and if not, sending a high-definition voice data radio bearer establishment signaling to the terminal through the air interface data radio bearer ID by the base station;
the receiving module is used for receiving the high-definition voice data radio bearer establishment signaling;
the establishing module is used for establishing a high-definition voice data radio bearer according to the high-definition voice data radio bearer establishing signaling and sending a result of completing the establishment of the high-definition voice data radio bearer to the base station;
and the second communication module is used for carrying out high-definition voice communication with the base station through the high-definition voice data wireless bearer.
Preferably, when the next air interface data radio bearer ID of the air interface data radio bearer ID is turned over, the apparatus further includes:
the receiving module is further configured to receive an intra-cell handover reconfiguration message sent by the base station; the reconfiguration message comprises a new security key that is not used by the terminal;
the second updating module is used for updating the used security key by adopting the new security key and sending the updated result to the base station;
and the second communication module is also used for carrying out high-definition voice call with the base station by using the new security key and the high-definition voice data wireless bearer.
The embodiment of the invention has the following advantages:
in the embodiment of the invention, when the base station receives the VoLTE data radio bearer establishment request, the air interface drbid is allocated to the VoLTE data radio bearer, whether the next air interface drbid of the air interface drbid is overturned or not is judged, if not, the VoLTE data radio bearer between the base station and the terminal is established based on the air interface drbid, and then the base station can carry out VoLTE conversation with the terminal through the high-definition voice data radio bearer. Therefore, through respectively establishing mechanisms of VoLTE bearing and intra-cell switching, the air interface drbid reconfiguration message is separated and compatible with all commercial terminals in the market, the problem that the establishment of the VoLTE bearing triggers the intra-cell switching failure is solved, and the user experience of the VoLTE call is improved. Compared with the air interface drbid distribution algorithm in the prior art, the air interface drbid distribution algorithm in the embodiment of the invention adopts a set of brand-new air interface drbid distribution algorithm, which not only meets the requirement of air interface data security of an LTE protocol, but also ensures the data security of VoLTE communication of a user.
Drawings
FIG. 1 is a flowchart illustrating a first method of an embodiment of a high definition voice call;
FIG. 2 is a flowchart illustrating a second embodiment of a method for high definition voice communication;
FIGS. 3a to 3k are diagrams illustrating an embodiment of a high-definition voice call according to the present invention;
FIGS. 4a to 4e are diagrams illustrating a second embodiment of a high-definition voice call according to the present invention;
fig. 5 is a flowchart illustrating a third step of an embodiment of a method for high-definition voice communication according to the present invention;
FIG. 6 is a block diagram of a base station of an embodiment of the present invention;
fig. 7 is a block diagram of a terminal according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 1, a first flowchart of the steps of a method embodiment of a high-definition voice call according to the present invention is shown, where the method is applied between a base station and a terminal.
In the present application, a base station is a base station of a cell, and a cell refers to a wireless area controlled by a base station, and a hexagon in a cellular communication model, in LTE (Long Term Evolution), one base station can be used to hang multiple cells, and different cells have cell ID marks.
The terminal may have the following features:
(1) on a hardware architecture, a device has a central processing unit, a memory, an input unit and an output unit, that is, the device is often a microcomputer device having a communication function. In addition, various input modes such as a keyboard, a mouse, a touch screen, a microphone, a camera and the like can be provided, and input can be adjusted as required. Meanwhile, the equipment often has a plurality of output modes, such as a telephone receiver, a display screen and the like, and can be adjusted according to needs;
(2) on a software system, the device must have an operating system, such as Windows Mobile, Symbian, Palm, Android, iOS, and the like. Meanwhile, the operating systems are more and more open, and personalized application programs developed based on the open operating system platforms are infinite, such as a communication book, a schedule, a notebook, a calculator, various games and the like, so that the requirements of personalized users are met to a great extent;
(3) in terms of communication capacity, the device has flexible access mode and high-bandwidth communication performance, and can automatically adjust the selected communication mode according to the selected service and the environment, thereby being convenient for users to use. The equipment can support GSM, WCDMA, CDMA2000, TDSCDMA, Wi-Fi, WiMAX and the like, thereby being suitable for various systems of networks, not only supporting voice services, but also supporting various wireless data services;
(4) in the aspect of function use, the equipment focuses more on humanization, individuation and multi-functionalization. With the development of computer technology, devices enter a human-centered mode from a device-centered mode, and the embedded computing, control technology, artificial intelligence technology, biometric authentication technology and the like are integrated, so that the human-oriented purpose is fully embodied. Due to the development of software technology, the equipment can be adjusted and set according to individual requirements, and is more personalized. Meanwhile, the device integrates a plurality of software and hardware, and the function is more and more powerful.
High definition Voice calls, also known as VoLTE calls, are a Voice technology, VoLTE is an abbreviation of Voice over LTE, and translation is the transmission of audio over the LTE network. VoLTE is an IMS-based voice service. The IMS becomes a core network standard architecture in the all-IP era because it supports multiple accesses and rich multimedia services. After the development and maturity of the past years, IMS has crossed the valley and become the mainstream choice for the improvement of the fixed voice domain, VoBB and PSTN network, and is also determined by 3GPP and GSMA as the standard architecture of mobile voice. VoLTE is an IP data transmission technology, a 2G/3G network is not needed, all services are borne on a 4G network, and the unification of data and voice services in the same network can be realized.
The most immediate experience that VoLTE technology brings to 4G users is shorter turn-on latency, and higher quality, more natural voice-video call effects. VoLTE is substantially different from 2G and 3G voice calls. VoLTE is an end-to-end voice solution that is architected under all IP conditions over 4G networks. Compared with 2G and 3G voice calls, the voice quality of VoLTE can be improved by about 40 percent because the VoLTE adopts a high-resolution coding and decoding technology. VoLTE brings lower access delay (waiting time after dialing) for users, which is 50% lower than 3G, approximately 2 seconds, while 2G times are 6-7 seconds. In addition, under 2G and 3G, a call drop occurs sometimes, but the call drop rate of VoLTE is close to zero.
For operators, deploying VoLTE means opening the way to evolve to mobile broadband voice. In the long run, this will bring two value to the operator, firstly, promote the wireless spectrum utilization ratio, reduce the network cost. For voice service, the frequency spectrum utilization efficiency of LTE is far better than that of the traditional system and reaches more than 4 times of that of GSM.
Another value is to improve the user experience, which is significantly better than the traditional CS voice. Firstly, the introduction of high-definition voice and video coding and decoding obviously improves the communication quality; secondly, the call connection time of the VoLTE is greatly shortened, and tests show that the VoLTE is shortened by more than half compared with a CS call; third, seamless integration with RCS can bring rich services.
The method specifically comprises the following steps:
the air interface is called an "air interface" throughout, and is an interface between a terminal and a base station. The air interface is an visual term, with respect to the "line interface" concept in wired communications. In wired communication, a "line interface" defines the physical dimensions and a series of specifications for electrical or optical signals; among wireless communication technologies, the "air interface" defines the technical specification of an electric wave link between a terminal device and a network device, making wireless communication as reliable as wire communication.
In the embodiment of the invention, a user initiates a VoLTE call through a terminal, the terminal sends a VoLTE call establishment flow to a core network, the core network sends a request for proposing an air interface Data Radio bearer (drb) required by the VoLTE call to a cell base station where the user is located after receiving the VoLTE call establishment flow, and the base station distributes an air interface Data Radio bearer ID (drbid) to the high-definition voice Data Radio bearer after receiving the request, namely the base station establishes a call channel for the VoLTE call.
the LTE protocol specifies that the value range of drbid is 3-32, and according to the existing drbid algorithm, drbid3 is sequentially distributed, when the drbid32 is distributed, the drbid3 is required to be distributed again, so that the used drbid is distributed, the condition is considered that the drbid is overturned, and therefore intra-cell handover is required.
In a preferred embodiment of the present invention, the air interface data radio bearer ID of the base station has a status identifier, where the status identifier includes an idle unused security key, an idle used security key, and an allocated used security key.
In practical application, a base station and a terminal need to use a security key in the process of establishing a communication channel, the base station also allocates a security key when allocating an air interface drbid for a high-definition voice data radio bearer, and the security key is used for ensuring the data security of the terminal. When drbid is not turned over, all drbid can use the same security key to establish VoLTE call.
Therefore, in order to distinguish whether drbid is used and whether drbid is being used, the status of drbid needs to be identified, and the status identification of drbid includes three types: spare unused security keys, spare used security keys, and assigned used security keys. The idle unused security key indicates that the air interface drbid is never used and can be used for establishing a VoLTE call; idle used security key indicates that drbid has established VoLTE call by using security key, and VoLTE call has ended, drbid has been released, and VoLTE call can not be established again; the allocated used security key indicates that drbid is using the security key for VoLTE call, and when the current VoLTE call is over, drbid is released.
So-called intra-cell handover means that the current air interfaces drbid of the base station all use the same security key to perform VoLTE call, and then the currently used security key is cleared and a new security key is redistributed. For example, after VoLTE call is established by using security key 1234 at air interface drbid 3-32, it is necessary to clear current security key 1234 and reassign a new security key 6789 when air interface drbid3 is reassigned.
In the prior art, it is determined whether the current air interface drbid is turned over when the current air interface drbid is established, and all the air interfaces drbid are used. For example, the base station uses the security key 1234 to establish the VoLTE call from the air interface drbid3 to the air interface drbid32, and after the air interface drbid32 is released, the VoLTE call is established again using the air interface drbid3, at this time, since the air interface drbid3 is already used, the intra-cell handover needs to be performed, and after the handover, the updated security key 6789 is used from the air interface drbid3 to the air interface drbid 32.
In this way, the base station triggers the intra-cell handover procedure to update the security key value, but since some terminals do not support intra-cell handover and VoLTE bearer to be sent in an air interface drbid reconfiguration message, intra-cell handover and VoLTE bearer establishment failure and VoLTE call failure are caused.
Therefore, for the above situation, the present application may determine in advance whether the next air interface drbid of the current air interface drbid is flipped, so that the situations of intra-cell handover and sending of the VoLTE bearer in one air interface reconfiguration message may not occur, thereby solving the problem of the failure of the establishment of the VoLTE call due to the failure of the establishment of the air interface drbid.
In a preferred embodiment of the present invention, the step of determining whether the radio bearer ID of the air interface data next to the radio bearer ID of the air interface data is turned over includes:
acquiring the state identifier of the radio bearer ID of the next air interface data;
if the status identifier of the next air interface data radio bearer ID is idle and the used security key is used, and the number of the air interface data radio bearer IDs whose status identifiers are idle and not using the security key in the base station is less than or equal to the preset value,
or when the state identifier of the next air interface data radio bearer ID is the allocated used security key, and the number of the air interface data radio bearer IDs of which all state identifiers are idle and which do not use the security key in the base station is less than or equal to a preset value, determining that the next air interface data radio bearer ID of the air interface data radio bearer ID is turned over.
Specifically, in the embodiment of the present invention, all the air interfaces drbid are not used, but the idle air interfaces drbid of the preset number are not used, that is, the state identifiers of the idle air interfaces drbid of the preset number are idle unused security keys in general. For example, the preset air interface drbid 29-32 does not establish the VoLTE call under the normal condition, namely the air interface drbid3-28 is used for establishing the VoLTE call. Then, in this case, the conditions for the base station to trigger the intra-cell roll-over are different from the prior art.
In the embodiment of the present invention, when the base station uses the current air interface drbid, the base station may first obtain the state identifier of the next air interface drbid, and if the state identifier of the next air interface drbid is an idle used security key, and the number of the air interface drbid whose state identifiers are idle unused security keys in the base station is less than or equal to a preset value, it may be determined that the next air interface drbid of the current air interface drbid is turned over, or the state identifier of the next air interface drbid is an allocated used security key, and when the number of the air interface drbid whose state identifiers are idle unused security keys in the base station is less than or equal to the preset value, it is determined that the next air interface drbid of the air interface drbid is turned over. For example, the number of unused air interfaces drbid is preset to be 4, which are air interfaces drbid 29-32, and the VoLTE call is currently established using the air interface drbid28, then it may be determined that the next air interface drbid is turned over at this time. Thus, the intra-cell handover, that is, the updated security key, is sent in the next air interface drbid reconfiguration message, and does not need to be sent in the reconfiguration message established by the current VoLTE bearer.
It should be noted that the reason for reserving a certain number of air interfaces drbid is that a scenario that the base station initiates establishment of multiple VoLTE bearers simultaneously may occur, and under the condition that drbid is not turned over, it may be ensured that a situation that the reserved drbid is smaller than the number of air interfaces drbid to be allocated does not occur. For example, there are 4 reserved air interfaces drbid, and there is only air interface drbid28 for the idle unused air interface drbid, but the base station needs to establish 4 VoLTE calls at the same time, at this time, the air interfaces drbid28, 29, 30, and 31 may be directly used to establish a VoLTE call, but if the existing technology is used, only 1 VoLTE call may be established, and the other 3 VoLTE calls may be established after being turned over, but the existing part of terminals do not support intra-cell handover and VoLTE bearer is sent in one air interface drbid reconfiguration message, so that the establishment of the other 3 VoLTE calls fails.
At present, it may be ensured that 4 VoLTE bearers are established simultaneously in the call process, and subsequently, the situation of establishing more VoLTE bearers simultaneously may be supported by adjusting the threshold of the number of empty drbid that are left idle and do not use the security key, where the preset 4 empty drbid is not used only for illustration, and may be set according to actual requirements in actual applications, which is not limited in this embodiment of the present invention.
In addition, since a certain number of air interfaces drbid are reserved in the embodiment of the present invention, the next air interface drbid of the current air interface drbid is not only the next one in sequence, but the next air interface drbid of the VoLTE call can be established.
when the base station allocates the air interface drbid to the terminal, the base station can use the air interface drbid to establish a volet bearer with the terminal.
In a preferred embodiment of the present invention, the step of establishing a high definition voice data radio bearer between the base station and the terminal based on the air interface data radio bearer ID includes:
acquiring a security key in use by the base station;
establishing a high-definition voice data wireless bearer between the base station and the terminal by adopting the safety key and the air interface data wireless bearer ID;
specifically, when the base station allocates the air interface drbid to the terminal, the base station also sends the security key being used to the terminal, and after receiving the security key, the terminal can use the security key to establish the VoLTE data radio bearer with the base station through the air interface drbid allocated by the base station.
And step 104, the base station carries out high-definition voice communication with the terminal through the high-definition voice data wireless bearer.
After the VoLTE data radio bearer between the base station and the terminal is established, VoLTE call can be performed by using the VoLTE data radio bearer.
In a preferred embodiment of the present invention, the step of the base station performing a high-definition voice call with the terminal through the high-definition voice data radio bearer includes:
and the base station carries out high-definition voice call with the terminal by using the safety key and the high-definition voice data wireless bearer.
When the base station performs VoLTE call with the terminal, the base station also needs to use a security key, which is also used to ensure data security of the terminal.
In the embodiment of the invention, when the base station receives the VoLTE data radio bearer establishment request, the air interface drbid is allocated to the VoLTE data radio bearer, whether the next air interface drbid of the air interface drbid is overturned or not is judged, if not, the VoLTE data radio bearer between the base station and the terminal is established based on the air interface drbid, and then the base station can carry out VoLTE conversation with the terminal through the high-definition voice data radio bearer. Therefore, whether the next air interface drbid of the current air interface drbid is overturned or not is judged in advance, so that the conditions of intra-cell switching and the situation that the VoLTE bearer is sent in an air interface reconfiguration message do not occur, and the problem that the VoLTE call establishment fails due to the establishment failure of the air interface drbid is solved.
Referring to fig. 2, a flowchart illustrating a second step of an embodiment of the method for high-definition voice call according to the present invention is shown, where the method is applied between a base station and a terminal; the method specifically comprises the following steps:
specifically, if the next air interface drbid of the current air interface drbid is turned over, the base station may first establish the VoLTE data radio bearer using the current air interface drbid and the currently used security key, and simultaneously, the base station may also send an intra-cell handover reconfiguration message to the terminal, where the reconfiguration message includes a new security key that is not used by the base station.
and after receiving the reconfiguration message, the terminal replaces the used security key with the new security key, and then establishes the VoLTE call with the base station by using the new security key. For example, the terminal establishes an air interface drbid bearer with the base station using the security key 1234, then updates the security key 1234 to 6789, and at this time, establishes a VoLTE call with the base station using the new security key 6789.
That is, if the base station determines that the next air interface drbid of the current air interface drbid is turned over, the current air interface drbid uses two security keys to establish a VoLTE call, otherwise, a security key is used to establish a VoLTE call.
When the base station sends the new security key to the terminal and uses the new security key to establish the VoLTE bearer with the terminal, the base station will update the state identifiers of all the empty drbid with the idle security key as the idle unused security key.
For example, the reserved air interface drbid is air interface drbid 29-32, the VoLTE call is currently established by using air interface drbid28, the next air interface drbid3 for establishing the VoLTE call is turned over by judgment, and at this time, the current state identifier of the air interface drbid 3-27 is the idle used security key, so that the state identifier of the air interface drbid 3-27 is updated to the idle unused security key.
The following examples are used to illustrate the embodiments of the present invention in detail:
assuming that the allocation range of the air interface drbid is 5-32, the state of drbid can be divided into the following three cases:
(1) drbid free of unused security keys;
(2) free drbid that has used the secure key;
(3) drbid assigned (in use) the used security key.
Referring to fig. 3a, in order to distinguish the three cases, different background colors are used in fig. 3a to 4 e.
Step 1: referring to fig. 3b, considering the situation that only one VoLTE bearer is established in the call process, the base station allocates the bearer of the air interface drbid5 first;
step 2: referring to fig. 3c, after the VoLTE call is ended, the drbid5 bearer is released, and the status of drbid5 is modified to indicate that the security key is idle and used. Initiating the VoLTE call again, and continuously distributing the bearing of an air interface drbid6 by the base station;
and 3, step 4: referring to fig. 3d, after the VoLTE call is finished, releasing the air interface drbid6 bearer, and then re-dialing the call, allocating new air interface drbid in turn;
and 5, step 5: referring to fig. 3e, when the allocated air interface drbid28 is allocated, 4 remaining idle air interfaces drbid without using the security key meet the intra-cell handover condition, and after the air interface VoLTE bearer is established, the base station initiates an intra-cell handover procedure to update the security key value;
and 6, step 6: referring to fig. 3f, the empty drbid 5-27 status is updated to the idle unused security key due to the reassignment of the security key value. Dialing the VoLTE call again, and reallocating drbid from the air interface drbid5 according to a new air interface drbid allocation algorithm;
and 7, step 7: referring to fig. 3g, the dialing of the VoLTE call is repeatedly ended;
and 8, step 8: referring to fig. 3h, until the air interface drbid 27 is allocated, since the air interface drbid28 is in an idle state where the security key is already used, the intra-cell handover condition is satisfied, and after the air interface VoLTE bearer is established, the base station initiates an intra-cell handover procedure to update the security key value;
9, 10: referring to fig. 3i, at step 4, when the air interface drbid28 is established, the old security key is used, and the security key is updated after the establishment, so that the new security key is also used for drbid28, that is, a process of replacing the new security key with the old security key is provided in the middle. Therefore, after the step 7, step 27 is established, drbid which determines that the new security key value is not used is only left 29, 30, 31, 32, and 28 actually uses the new security key value, so as to satisfy the intra-cell switching condition, and step 7, the security key value is updated again, so that the security key value updated for the second time is only used 27, that is, the situation presented in step 8.
Because the security key values are reallocated, the states of the air interface drbid 5-26 and the air interface drbid28 are updated to idle unused security keys. Dialing the VoLTE call again, and restarting to distribute the air interface drbid from the air interface drbid 5;
and 11, step 11: referring to fig. 3j, until the air interface drbid 26 is allocated, since the air interface drbid 27 is in an idle state where the security key is used, the air interface drbid 27 is skipped over for next VoLTE call, and the air interface drbid28 is directly allocated;
step 12: referring to fig. 3k, after the air interface drbid28 is allocated, meeting the intra-cell handover condition, the base station initiates an intra-cell handover procedure, and updates the security key value of the security key;
by analogy, the base station initiates the intra-cell switching by the round of flow when the air interfaces drbid 27 and 28 are allocated in each round, the air interfaces drbid with the same security key value in the previous round cannot be reused, the requirement of the protocol on the allocation of the air interfaces drbid is met, and the security of air interface data is ensured.
Referring to fig. 4a, for the case of establishing two VoLTE calls in the call process, the new drbid allocation algorithm is similar;
referring to fig. 4b, when drbid 27 and drbid28 are allocated, 4 empty drbid without using the security key are left, which satisfy the intra-cell handover condition, and after the establishment of the empty VoLTE bearer is completed, the base station initiates the intra-cell handover procedure to update the security key value of the security key;
referring to fig. 4c, the VoLTE call continues to be repeatedly dialed, and the air interface drbid allocation result of the second round is similar to a VoLTE bearer condition;
referring to fig. 4d, when distributing to air interfaces drbid25, 26, meeting the intra-cell handover condition, the base station initiates an intra-cell handover procedure, and updates the security key value of the security key;
referring to fig. 4e, the next VoLTE call is redistributed from air interfaces drbid5, 6;
in summary, under the condition that two VoLTE bearers are established in the call process, the base station initiates intra-cell handover in turn when each round of air interfaces drbid25, 26, 27 and 28 are allocated, and the drbid with the same security key value in the previous round cannot be reused, so that the requirement of the protocol on drbid allocation is met, and the security of air interface data is ensured.
In the embodiment of the invention, when a base station receives a VoLTE data radio bearer establishment request, an air interface drbid is allocated to the VoLTE data radio bearer, and then whether the next air interface drbid of the air interface drbid is overturned or not is judged, then a high-definition voice data radio bearer between the base station and a terminal is established based on an air interface data radio bearer ID, and the base station sends an intra-cell switching reconfiguration message to the terminal; and the reconfiguration message comprises a new unused security key of the base station, after the terminal reconfiguration is completed, the base station uses the new security key and the high-definition voice data radio bearer to carry out high-definition voice communication with the terminal, and then the base station updates the state identifiers of all idle interface data radio bearer IDs of which the state identifiers are idle and used security keys into idle unused security keys. Therefore, when the next air interface drbid of the current air interface drbid is judged to be turned over, the base station can carry out intra-cell switching and send the new security key to the terminal, and the base station and the terminal continue to establish the VoLTE call by adopting the new security key.
Referring to fig. 5, a flow chart illustrating a third step of an embodiment of the method for high-definition voice call according to the present invention is shown, where the method is applied between a base station and a terminal; the method specifically comprises the following steps:
the method comprises the steps that a user initiates a VoLTE call through a terminal, the terminal sends a VoLTE call establishment flow to a core network, the core network sends a request for proposing an air interface Data Radio bearer (drb) required by the VoLTE call to a cell base station where the user is located after receiving the VoLTE call establishment flow, and the base station distributes an air interface Data Radio bearer ID (drbid) for the high-definition voice Data Radio bearer after receiving the request, namely the base station establishes a call channel for the VoLTE call.
after receiving a VoLTE call establishment request sent by a core network, a base station sends a VoLTE data radio bearer establishment signaling to a terminal, wherein the signaling comprises an air interface drbid and a security key required by VoLTE call establishment.
and 307, the terminal performs high-definition voice call with the base station by using the new security key and the high-definition voice data wireless bearer.
It should be noted that, for simplicity of description, the method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the illustrated order of acts, as some steps may occur in other orders or concurrently in accordance with the embodiments of the present invention. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that no particular act is required to implement the invention.
Referring to fig. 6, a block diagram of a base station according to an embodiment of the present invention is shown, where the base station communicates with a terminal; the base station may specifically include the following modules:
the allocation module 401 is configured to allocate an air interface data radio bearer ID to a high-definition voice data radio bearer when a high-definition voice data radio bearer establishment request is received;
a judging module 402, configured to judge whether a radio bearer ID of air interface data next to the radio bearer ID of the air interface data is turned over;
a first establishing module 403, configured to establish a high-definition voice data radio bearer between the base station and the terminal based on the air interface data radio bearer ID;
a first communication module 404, configured to perform a high-definition voice call with the terminal through the high-definition voice data radio bearer.
In a preferred embodiment of the present invention, the first establishing module includes:
a key obtaining submodule, configured to obtain a security key being used by the base station;
a radio bearer establishing submodule, configured to establish a high-definition voice data radio bearer between the base station and the terminal by using the security key and the air interface data radio bearer ID;
the first communication module is further used for carrying out high-definition voice call with the terminal by using the safety secret key and the high-definition voice data wireless bearer.
In a preferred embodiment of the present invention, the base station further includes:
a second establishing module, configured to establish a high-definition voice data radio bearer between the base station and the terminal based on the empty data radio bearer ID if a next empty data radio bearer ID of the empty data radio bearer ID is flipped, and send an intra-cell handover reconfiguration message to the terminal by the base station; the reconfiguration message comprises a new security key that is not used by the base station;
and the first communication module is also used for carrying out high-definition voice communication between the base station and the terminal by using the new security key and the high-definition voice data radio bearer after the reconfiguration of the terminal is completed.
In a preferred embodiment of the present invention, the air interface data radio bearer ID of the base station has a status identifier, where the status identifier includes an idle unused security key, an idle used security key, and an allocated used security key;
the judging module comprises:
a status identifier obtaining submodule, configured to obtain a status identifier of the next air interface data radio bearer ID;
a determining submodule, configured to, if the status identifier of the next air interface data radio bearer ID is idle and the used security key is used, and the number of air interface data radio bearer IDs whose status identifiers are idle and the security key is not used in the base station is less than or equal to a preset value,
or when the state identifier of the next air interface data radio bearer ID is the allocated used security key, and the number of the air interface data radio bearer IDs of which all state identifiers are idle and which do not use the security key in the base station is less than or equal to a preset value, determining that the next air interface data radio bearer ID of the air interface data radio bearer ID is turned over.
In a preferred embodiment of the present invention, the base station further includes:
and the first updating module is used for updating the state identifications of all idle air interface data radio bearer IDs of which the state identifications are idle and use the security keys into idle unused security keys.
For the base station embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and for relevant points, refer to the partial description of the method embodiment.
Referring to fig. 7, a block diagram of a terminal in communication with a base station according to an embodiment of the present invention is shown; the terminal may specifically include the following modules:
a sending module 501, configured to send a high-definition voice data radio bearer establishment request to the base station; the base station is used for allocating an air interface data radio bearer ID to the high-definition voice data radio bearer, judging whether the next air interface data radio bearer ID of the air interface data radio bearer ID is overturned, and if not, sending a high-definition voice data radio bearer establishment signaling to the terminal through the air interface data radio bearer ID by the base station;
a receiving module 502, configured to receive the high-definition voice data radio bearer establishment signaling;
the establishing module 503 is configured to establish a high-definition voice data radio bearer according to the high-definition voice data radio bearer establishing signaling, and send a result of completing establishing the high-definition voice data radio bearer to the base station;
and a second communication module 504, configured to perform a high-definition voice call with the base station through the high-definition voice data radio bearer.
In a preferred embodiment of the present invention, when the next air interface data radio bearer ID of the air interface data radio bearer ID is turned over, the apparatus further includes:
the receiving module is further configured to receive an intra-cell handover reconfiguration message sent by the base station; the reconfiguration message comprises a new security key that is not used by the terminal;
the second updating module is used for updating the used security key by adopting the new security key and sending the updated result to the base station;
and the second communication module is also used for carrying out high-definition voice call with the base station by using the new security key and the high-definition voice data wireless bearer.
For the terminal embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and for relevant points, reference may be made to the partial description of the method embodiment.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The method, the base station and the terminal for high-definition voice communication provided by the invention are introduced in detail, and a specific example is applied in the text to explain the principle and the implementation of the invention, and the description of the above embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A method for high-definition voice communication is characterized in that the method is applied between a base station and a terminal; the method comprises the following steps:
when the base station receives a high-definition voice data radio bearer establishment request, the base station allocates an air interface data radio bearer ID for the high-definition voice data radio bearer;
judging whether the next air interface data radio bearer ID of the air interface data radio bearer ID is turned over;
if not, establishing high-definition voice data radio bearer between the base station and the terminal based on the air interface data radio bearer ID;
the base station carries out high-definition voice call with the terminal through the high-definition voice data wireless bearer;
wherein, the method further comprises:
if the next empty data radio bearer ID of the empty data radio bearer ID is turned over, establishing a high-definition voice data radio bearer between the base station and the terminal based on the empty data radio bearer ID, and sending an intra-cell switching reconfiguration message to the terminal by the base station; the reconfiguration message comprises a new security key that is not used by the base station;
and after the reconfiguration of the terminal is completed, the base station uses the new security key and the high-definition voice data wireless bearer to carry out high-definition voice communication with the terminal.
2. The method according to claim 1, wherein the step of establishing a high-definition voice data radio bearer between the base station and the terminal based on the air interface data radio bearer ID includes:
acquiring a security key in use by the base station;
establishing a high-definition voice data wireless bearer between the base station and the terminal by adopting the safety key and the air interface data wireless bearer ID;
the base station carries out high-definition voice call with the terminal through the high-definition voice data wireless bearer, and the method comprises the following steps:
and the base station carries out high-definition voice call with the terminal by using the safety key and the high-definition voice data wireless bearer.
3. The method of claim 1, wherein the base station air interface data radio bearer ID has a status identifier, and the status identifier includes an idle unused security key, an idle used security key, and an allocated used security key;
the step of judging whether the next air interface data radio bearer ID of the air interface data radio bearer ID is turned over includes:
acquiring the state identifier of the radio bearer ID of the next air interface data;
if the status identifier of the next air interface data radio bearer ID is idle and the used security key is used, and the number of the air interface data radio bearer IDs whose status identifiers are idle and not using the security key in the base station is less than or equal to the preset value,
or when the state identifier of the next air interface data radio bearer ID is the allocated used security key, and the number of the air interface data radio bearer IDs of which all state identifiers are idle and which do not use the security key in the base station is less than or equal to a preset value, determining that the next air interface data radio bearer ID of the air interface data radio bearer ID is turned over.
4. The method of claim 1, further comprising:
and the base station updates the state identifications of all idle air interface data radio bearer IDs with the state identifications of idle used security keys into idle unused security keys.
5. A method for high-definition voice communication is characterized in that the method is applied between a base station and a terminal; the method comprises the following steps:
the terminal sends a high-definition voice data radio bearer establishment request to the base station; the base station is used for allocating an air interface data radio bearer ID to the high-definition voice data radio bearer, judging whether the next air interface data radio bearer ID of the air interface data radio bearer ID is overturned, and if not, sending a high-definition voice data radio bearer establishment signaling to the terminal through the air interface data radio bearer ID by the base station;
the terminal receives the high-definition voice data radio bearer establishment signaling;
the terminal establishes a high-definition voice data wireless bearer according to the high-definition voice data wireless bearer establishing signaling, and sends a result of completing the establishment of the high-definition voice data wireless bearer to the base station;
the terminal and the base station carry out high-definition voice call through the high-definition voice data wireless bearer;
wherein, when the next empty data radio bearer ID of the empty data radio bearer ID is flipped, the method further comprises:
the terminal receives an intra-cell switching reconfiguration message sent by the base station; the reconfiguration message comprises a new security key that is not used by the terminal;
the terminal updates the used security key by adopting the new security key and sends the updated result to the base station;
and the terminal uses the new safety key and the high-definition voice data wireless bearer to carry out high-definition voice communication with the base station.
6. A base station, wherein the base station communicates with a terminal; the base station comprises:
the allocation module is used for allocating an air interface data radio bearer ID to the high-definition voice data radio bearer when a high-definition voice data radio bearer establishment request is received;
the judging module is used for judging whether the next air interface data radio bearer ID of the air interface data radio bearer ID is overturned;
a first establishing module, configured to establish a high-definition voice data radio bearer between the base station and the terminal based on the air interface data radio bearer ID;
the first communication module is used for carrying out high-definition voice communication with the terminal through the high-definition voice data wireless bearer;
wherein, the base station also comprises:
a second establishing module, configured to establish a high-definition voice data radio bearer between the base station and the terminal based on the empty data radio bearer ID if a next empty data radio bearer ID of the empty data radio bearer ID is flipped, and send an intra-cell handover reconfiguration message to the terminal by the base station; the reconfiguration message comprises a new security key that is not used by the base station;
and the first communication module is also used for carrying out high-definition voice communication between the base station and the terminal by using the new security key and the high-definition voice data radio bearer after the reconfiguration of the terminal is completed.
7. The base station of claim 6, wherein the first establishing module comprises:
a key obtaining submodule, configured to obtain a security key being used by the base station;
a radio bearer establishing submodule, configured to establish a high-definition voice data radio bearer between the base station and the terminal by using the security key and the air interface data radio bearer ID;
the first communication module is further used for carrying out high-definition voice call with the terminal by using the safety secret key and the high-definition voice data wireless bearer.
8. The base station of claim 6, wherein the base station air interface data radio bearer ID has a status identifier, and the status identifier includes an idle unused security key, an idle used security key, and an allocated used security key;
the judging module comprises:
a status identifier obtaining submodule, configured to obtain a status identifier of the next air interface data radio bearer ID;
a determining submodule, configured to, if the status identifier of the next air interface data radio bearer ID is idle and the used security key is used, and the number of air interface data radio bearer IDs whose status identifiers are idle and the security key is not used in the base station is less than or equal to a preset value,
or when the state identifier of the next air interface data radio bearer ID is the allocated used security key, and the number of the air interface data radio bearer IDs of which all state identifiers are idle and which do not use the security key in the base station is less than or equal to a preset value, determining that the next air interface data radio bearer ID of the air interface data radio bearer ID is turned over.
9. The base station of claim 6, wherein the base station further comprises:
and the first updating module is used for updating the state identifications of all idle air interface data radio bearer IDs of which the state identifications are idle and use the security keys into idle unused security keys.
10. A terminal, wherein the terminal is in communication with a base station; the terminal comprises:
the sending module is used for sending a high-definition voice data radio bearer establishment request to the base station; the base station is used for allocating an air interface data radio bearer ID to the high-definition voice data radio bearer, judging whether the next air interface data radio bearer ID of the air interface data radio bearer ID is overturned, and if not, sending a high-definition voice data radio bearer establishment signaling to the terminal through the air interface data radio bearer ID by the base station;
the receiving module is used for receiving the high-definition voice data radio bearer establishment signaling;
the establishing module is used for establishing a high-definition voice data radio bearer according to the high-definition voice data radio bearer establishing signaling and sending a result of completing the establishment of the high-definition voice data radio bearer to the base station;
the second communication module is used for carrying out high-definition voice communication with the base station through the high-definition voice data wireless bearer;
wherein, the terminal also comprises:
the receiving module is further configured to receive an intra-cell handover reconfiguration message sent by the base station; the reconfiguration message comprises a new security key that is not used by the terminal;
the second updating module is used for updating the used security key by adopting the new security key and sending the updated result to the base station;
and the second communication module is also used for carrying out high-definition voice call with the base station by using the new security key and the high-definition voice data wireless bearer.
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