CN106161370B - Media coding adjusting method and terminal - Google Patents
Media coding adjusting method and terminal Download PDFInfo
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- CN106161370B CN106161370B CN201510163438.6A CN201510163438A CN106161370B CN 106161370 B CN106161370 B CN 106161370B CN 201510163438 A CN201510163438 A CN 201510163438A CN 106161370 B CN106161370 B CN 106161370B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
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- H—ELECTRICITY
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- H04W—WIRELESS COMMUNICATION NETWORKS
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Abstract
The invention discloses a method for adjusting media coding, which comprises the following steps: when the wireless link layer of the terminal determines that the current wireless link quality can not meet the existing communication service quality requirement, the wireless link layer requests an upper protocol layer of the terminal to change the communication service media type; after receiving the request, the upper protocol layer selects a media coding format adaptive to the quality of the current wireless link according to a media type list and carries out media coding type negotiation to the opposite end of the terminal; and the upper protocol layer adopts the negotiated media coding format to carry out media conversation. The invention also discloses a terminal.
Description
Technical Field
The present invention relates to terminal technologies, and in particular, to a method for adjusting media coding and a terminal.
Background
Currently, in the third Generation Partnership Project (3 GPP) technical standard, communication protocols are designed in layers, each protocol layer assumes a corresponding communication function, and the protocol layers are relatively independent in architecture. In other words, the upper and lower layer protocols only perform uplink and downlink transmission of traffic through the traffic interface, but are independent of each other.
Therefore, the communication states of the upper and lower protocol layers cannot be interacted, and further, when the state of a certain protocol layer deteriorates, the upper protocol layer cannot be notified, and finally, the communication service cannot be normally provided. Specifically, for a terminal, in a volte (voice over lte) system, due to a separate architecture design of a control plane and a media plane, a voice media coding type cannot effectively interact with a bottom layer wireless link quality, so that when a wireless link deteriorates, a voice media coding type of an upper layer protocol layer cannot be timely and flexibly adjusted.
Disclosure of Invention
In order to solve the existing technical problem, embodiments of the present invention provide a method and a terminal for adjusting media coding.
The embodiment of the invention provides a method for adjusting media coding, which comprises the following steps:
when the wireless link layer of the terminal determines that the current wireless link quality can not meet the existing communication service quality requirement, the wireless link layer requests an upper protocol layer of the terminal to change the communication service media type;
after receiving the request, the upper protocol layer selects a media coding format adaptive to the quality of the current wireless link according to a media type list and carries out media coding type negotiation to the opposite end of the terminal;
and the upper protocol layer adopts the negotiated media coding format to carry out media conversation.
In the foregoing solution, before the radio link layer determines that the current radio link quality cannot meet the existing requirement of the communication service quality, the method further includes:
the wireless link layer detects and senses a bottom wireless environment;
the wireless link layer analyzes the current wireless link according to the detected and sensed information;
correspondingly, the wireless link layer determines that the current wireless link quality can not meet the existing communication service quality requirement according to the analysis result.
In the above solution, the requesting the upper protocol layer of the terminal to change the media type of the communication service includes:
and the wireless link layer requests the upper protocol layer to change the media type of the communication service through the set coordination state communication interface.
In the above scheme, determining that the current radio link quality cannot meet the existing requirement of the communication service quality includes:
determining that the quality of the current wireless link cannot meet the existing communication service quality requirement according to a set service quality strategy; the service quality strategy is used for representing the quality index satisfied by the existing communication service.
In the foregoing solution, the negotiating a media coding type to an opposite end of the terminal includes:
the upper Protocol layer sends a Session Description Protocol (SDP) request to the opposite terminal according to the selected media coding format;
and the upper layer protocol layer receives the confirmation of the SDP request sent by the opposite terminal.
An embodiment of the present invention further provides a terminal, including: a wireless link layer module and an upper protocol layer module; wherein the content of the first and second substances,
the wireless link layer module is used for requesting the upper layer protocol layer module to change the media type of the communication service when determining that the current wireless link quality can not meet the existing communication service quality requirement;
the upper protocol layer module is used for selecting a media coding format adaptive to the current wireless link quality according to a media type list after receiving the request, and carrying out media coding type negotiation to the opposite end of the terminal; and the negotiated media coding format is adopted for media communication.
In the above scheme, the radio link layer module is further configured to detect and sense a bottom layer radio environment; analyzing the current wireless link according to the detected and sensed information;
correspondingly, the wireless link layer module determines that the current wireless link quality can not meet the existing communication service quality requirement according to the analysis result.
In the foregoing solution, the radio link layer module is specifically configured to: determining that the quality of the current wireless link cannot meet the existing communication service quality requirement according to a set service quality strategy; the service quality strategy is used for representing the quality index satisfied by the existing communication service.
In the foregoing solution, the radio link layer module is specifically configured to: and requesting the upper protocol layer module to change the media type of the communication service through the established coordination state communication interface.
In the foregoing solution, the upper protocol layer module is specifically configured to: sending an SDP request to the opposite terminal according to the selected media coding format; and receiving the confirmation of the SDP request sent by the opposite terminal.
According to the media coding adjusting method and the terminal provided by the embodiment of the invention, when a wireless link layer of the terminal determines that the current wireless link quality cannot meet the existing communication service quality requirement, the wireless link layer requests an upper protocol layer of the terminal to change the media type of the communication service; after receiving the request, the upper protocol layer selects a media coding format adaptive to the quality of the current wireless link according to a media type list and carries out media coding type negotiation to the opposite end of the terminal; the upper protocol layer adopts the negotiated media coding format to carry out media conversation, thus realizing the interaction between the wireless environment state and the communication service and leading the service to be better and more flexibly adapted to the wireless environment.
Drawings
In the drawings, which are not necessarily drawn to scale, like reference numerals may describe similar components in different views. Like reference numerals having different letter suffixes may represent different examples of similar components. The drawings illustrate generally, by way of example, but not by way of limitation, various embodiments discussed herein.
FIG. 1 is a flow chart of a method for adjusting media encoding according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a second method for adjusting media encoding according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a third terminal according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
In the prior art, in a VoLTE system, due to the design based on protocol layering and relatively independent architecture, the state and capability of each other between protocol layers are isolated. Under such conditions, when the environment of the underlying wireless network changes (e.g., channel deterioration, congestion), the underlying link cannot provide the original guarantee (e.g., expected bandwidth, error rate, delay, etc.), and at this time, an appropriate communication mechanism between protocol layers is absent to negotiate so as to achieve a new steady-state condition of the communication link.
Based on this, in various embodiments of the invention: when the wireless link layer of the terminal determines that the current wireless link quality can not meet the existing communication service quality requirement, the wireless link layer requests an upper protocol layer of the terminal to change the communication service media type; after receiving the request, the upper protocol layer selects a media coding format adaptive to the quality of the current wireless link according to a media type list and carries out media coding type negotiation to the opposite end of the terminal; and the upper protocol layer adopts the negotiated media coding format to carry out media conversation.
Example one
The adjusting method of media encoding of this embodiment, as shown in fig. 1, includes the following steps:
step 101: when the wireless link layer of the terminal determines that the current wireless link quality can not meet the existing communication service quality requirement, the wireless link layer requests an upper protocol layer of the terminal to change the communication service media type;
here, the upper protocol layer includes, but is not limited to, a Radio Resource Control (RRC) layer, and the like.
Before performing this step, the method may further include:
the wireless link layer detects and senses a bottom wireless environment;
the wireless link layer analyzes the current wireless link according to the detected and sensed information;
correspondingly, the wireless link layer determines that the current wireless link quality can not meet the existing communication service quality requirement according to the analysis result.
The radio link layer may detect and sense a bottom radio environment by using control signaling of a control plane, and the like.
In practical applications, the detected and sensed information includes but is not limited to: signal strength, signal to noise ratio, bit error rate, etc. of the wireless link.
The analyzing the current wireless link may specifically include: and obtaining the useful signal power of the opposite end of the terminal, the signal-to-noise ratio of the link and the like according to the detection and perception information so as to obtain a corresponding analysis result.
The determining that the current wireless link quality cannot meet the existing communication service quality requirement specifically includes:
determining that the quality of the current wireless link cannot meet the existing communication service quality requirement according to a set service quality strategy; the service quality strategy is used for representing the quality index satisfied by the existing communication service.
In practical application, whether the current service quality requirement is met can be detected by judging the quality (such as signal strength, signal-to-noise ratio, bit error rate and the like) of the current wireless link.
In practical application, the radio link layer may request the upper protocol layer to change the media type of the communication service through the established coordination state communication interface.
The coordinated state communication interface may be a communication state report channel and corresponding state indication of whether the radio link meets a quality of service requirement.
Step 102: after receiving the request, the upper protocol layer selects a media coding format adaptive to the quality of the current wireless link according to a media type list and carries out media coding type negotiation to the opposite end of the terminal;
here, the media type list is a set of media type parameter sets agreed by both parties in the service negotiation process.
The selecting the media coding format adapted to the current wireless link quality refers to: and selecting a coding format lower than the current media rate, wherein the selected coding format can enable the current link quality to meet the existing communication service quality requirement.
In practical application, the negotiating a media coding type to an opposite end of the terminal specifically includes:
the upper protocol layer sends an SDP request to the opposite terminal according to the selected media coding format;
and the upper layer protocol layer receives the confirmation of the SDP request sent by the opposite terminal.
Step 103: and the upper protocol layer adopts the negotiated media coding format to carry out media conversation.
In the method for adjusting media coding provided by the embodiment of the invention, when a wireless link layer of a terminal determines that the current wireless link quality cannot meet the existing communication service quality requirement, a request is made to an upper protocol layer of the terminal to change the media type of a communication service; after receiving the request, the upper protocol layer selects a media coding format adaptive to the quality of the current wireless link according to a media type list and carries out media coding type negotiation to the opposite end of the terminal; the upper protocol layer adopts the negotiated media coding format to carry out media conversation, thus realizing the interaction between the wireless environment state and the communication service and leading the service to be better and more flexibly adapted to the wireless environment.
In addition, the radio link layer can request the upper protocol layer to change the media type of the communication service through the established coordination state communication interface, which is based on the protocol and state interaction inside the terminal and has no influence on the existing communication protocol, thus the scheme of the embodiment of the invention is simple, convenient and easy to realize.
Example two
On the basis of the first embodiment, this embodiment describes in detail the adjustment process of media encoding, as shown in fig. 2, the process includes the following steps:
step 201: a wireless link layer of the terminal detects and senses a bottom wireless environment;
specifically, the bottom layer radio link layer performs an LTE radio link check;
step 202: the wireless link layer analyzes the current wireless link according to the detected and sensed information;
here, in other words, the LTE radio link quality is evaluated.
Step 203: the wireless link layer judges whether the quality of the current wireless link meets the requirement of the current media coding service, if so, the step 204 is executed, otherwise, the step 201 is returned;
here, the determining whether the current wireless link quality meets the current media coding service requirement, in other words, determining whether the current wireless link quality can meet the existing communication service quality requirement;
specifically, according to a set service quality strategy, judging whether the quality of the current wireless link meets the requirements of the current media coding service; the service quality strategy is used for representing the quality index satisfied by the existing communication service.
Step 204: the wireless link layer sends a state indication to the upper protocol layer of the terminal to request the change of the communication service media type;
step 205: the upper layer protocol layer selects a coding format lower than the current media rate according to the received state indication and the media type list so as to enable the current link quality to meet the existing communication service quality requirement;
step 206: the upper layer protocol layer initiates an SDP request to the opposite end of the terminal according to the selected media coding format;
here, the purpose of step 206 is to initiate negotiation of a new media coding type to the peer.
Step 207: when the opposite end receives and confirms the SDP request, the upper layer protocol layer performs media (voice) call according to the newly agreed media encoding format, and returns to step 201.
Here, the purpose of returning to step 201 is to: the coding format of the media can be adjusted in real time according to the quality of the wireless link, so as to ensure better service quality.
As can be seen from the above description, the scheme provided in this embodiment is proposed for the relatively closed communication state interaction defect between the current independent protocol layers, and is a scheme for adjusting media coding based on link quality, and provides an inter-layer communication interaction mechanism by providing a corresponding communication interface, so as to establish communication state intercommunication, so as to flexibly and efficiently perform communication negotiation.
Compared with the prior implementation scheme:
firstly, the realization is simple; the scheme of the embodiment is based on the interaction between the protocol and the state in the terminal, and has no influence on the existing communication protocol, so the implementation is simpler.
Secondly, the method is flexible and efficient; the wireless environment state is interacted with the communication service, so that the service can be better and more flexibly adapted to the wireless environment.
EXAMPLE III
On the basis of the first and second embodiments, this embodiment provides a terminal, as shown in fig. 3, including: a radio link layer module 31 and an upper layer protocol layer module 32; wherein the content of the first and second substances,
the radio link layer module 31 is configured to request the upper protocol layer module 32 to change the media type of the communication service when it is determined that the current radio link quality cannot meet the existing requirement of the communication service quality;
the upper protocol layer module 32 is configured to select a media coding format adapted to the current radio link quality according to a media type list after receiving the request, and perform media coding type negotiation to an opposite end of the terminal; and the negotiated media coding format is adopted for media communication.
Wherein, the upper protocol layer includes but is not limited to RRC layer and the like.
The radio link layer module 31 is further configured to detect and sense a bottom layer radio environment; analyzing the current wireless link according to the detected and sensed information;
accordingly, the radio link layer module 31 determines that the current radio link quality cannot meet the existing communication service quality requirement according to the analysis result.
The radio link layer module 31 may detect and sense a bottom radio environment by using control signaling of a control plane.
In practical applications, the detected and sensed information includes but is not limited to: signal strength, signal to noise ratio, bit error rate, etc. of the wireless link.
The analyzing the current wireless link may specifically include: and obtaining the useful signal power of the opposite end of the terminal, the signal-to-noise ratio of the link and the like according to the detection and perception information so as to obtain a corresponding analysis result.
The determining that the current wireless link quality cannot meet the existing communication service quality requirement specifically includes:
determining that the quality of the current wireless link cannot meet the existing communication service quality requirement according to a set service quality strategy; the service quality strategy is used for representing the quality index satisfied by the existing communication service.
In practical application, whether the current service quality requirement is met can be detected by judging the quality (such as signal strength, signal-to-noise ratio, bit error rate and the like) of the current wireless link.
In practical application, the radio link layer module 31 may request the upper protocol layer module 32 to change the media type of the communication service through the established coordination state communication interface.
The coordinated state communication interface may be a communication state report channel and corresponding state indication of whether the radio link meets a quality of service requirement.
The media type list is a set of media type parameter set agreed by both parties in the service negotiation process.
The selecting the media coding format adapted to the current wireless link quality refers to: and selecting a coding format lower than the current media rate, wherein the selected coding format can enable the current link quality to meet the existing communication service quality requirement.
In practical application, the negotiating a media coding type to an opposite end of the terminal specifically includes:
the upper protocol layer sends an SDP request to the opposite terminal according to the selected media coding format;
and the upper layer protocol layer receives the confirmation of the SDP request sent by the opposite terminal.
In practical application, the wireless link layer module 31 and the upper protocol layer module 32 may be implemented by a Central Processing Unit (CPU), a Microprocessor (MCU), a Digital Signal Processor (DSP), or a Programmable logic Array (FPGA) in a terminal in combination with a transceiver.
In the terminal provided in the embodiment of the present invention, when the wireless link layer module 31 of the terminal determines that the current wireless link quality cannot meet the existing communication service quality requirement, it requests the upper protocol layer module 32 of the terminal to change the media type of the communication service; after receiving the request, the upper layer protocol layer module 32 selects a media coding format adapted to the quality of the current wireless link according to a media type list, and performs media coding type negotiation to the opposite end of the terminal; the upper protocol layer module 32 performs media communication by using the negotiated media encoding format, so that interaction between a wireless environment state and a communication service can be realized, and the service can be better and more flexibly adapted to a wireless environment.
In addition, the radio link layer module 31 may request the upper layer protocol layer module 32 to change the media type of the communication service through the established coordination state communication interface, which is based on the protocol and state interaction inside the terminal and has no influence on the existing communication protocol, so that the scheme of the embodiment of the present invention is simple, convenient and easy to implement.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, 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, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (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 apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, 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 apparatus 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 apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (8)
1. A method for adjusting media encoding, the method comprising:
when the wireless link layer of the terminal determines that the current wireless link quality can not meet the existing communication service quality requirement, the wireless link layer requests an upper protocol layer of the terminal to change the communication service media type;
after receiving the request, the upper protocol layer selects a media coding format adaptive to the quality of the current wireless link according to a media type list and carries out media coding type negotiation to the opposite end of the terminal;
the upper protocol layer adopts the negotiated media coding format to carry out media communication; wherein the content of the first and second substances,
the selecting a media coding format adapted to the current radio link quality comprises:
selecting a media encoding format with a rate lower than the current media rate, and enabling the current wireless link quality to meet the existing communication service quality requirement by adopting the selected media encoding format
The requesting the upper protocol layer of the terminal to change the media type of the communication service includes:
and the wireless link layer requests the upper protocol layer to change the media type of the communication service through the set coordination state communication interface.
2. The method of claim 1, wherein before the radio link layer determines that the current radio link quality fails to meet the existing communication quality of service requirement, the method further comprises:
the wireless link layer detects and senses a bottom wireless environment;
the wireless link layer analyzes the current wireless link according to the detected and sensed information;
correspondingly, the wireless link layer determines that the current wireless link quality can not meet the existing communication service quality requirement according to the analysis result.
3. The method of claim 1, wherein determining that the current radio link quality fails to meet an existing communication quality of service requirement comprises:
determining that the quality of the current wireless link cannot meet the existing communication service quality requirement according to a set service quality strategy; the service quality strategy is used for representing the quality index satisfied by the existing communication service.
4. The method of claim 1, wherein the negotiating the media coding type to the peer of the terminal comprises:
the upper layer protocol layer sends a Session Description Protocol (SDP) request to the opposite terminal according to the selected media coding format;
and the upper layer protocol layer receives the confirmation of the SDP request sent by the opposite terminal.
5. A terminal, characterized in that the terminal comprises: a wireless link layer module and an upper protocol layer module; wherein the content of the first and second substances,
the wireless link layer module is used for requesting the upper layer protocol layer module to change the media type of the communication service when determining that the current wireless link quality can not meet the existing communication service quality requirement;
the upper protocol layer module is used for selecting a media coding format adaptive to the current wireless link quality according to a media type list after receiving the request, and carrying out media coding type negotiation to the opposite end of the terminal; and adopting the negotiated media coding format to carry out media communication; wherein the content of the first and second substances,
the selecting a media coding format adapted to the current radio link quality comprises:
selecting a media coding format with a rate lower than the current media rate, and enabling the current wireless link quality to meet the existing communication service quality requirement by adopting the selected media coding format;
the radio link layer module is specifically configured to: and requesting the upper protocol layer module to change the media type of the communication service through the established coordination state communication interface.
6. The terminal of claim 5, wherein the radio link layer module is further configured to detect and sense an underlying radio environment; analyzing the current wireless link according to the detected and sensed information;
correspondingly, the wireless link layer module determines that the current wireless link quality can not meet the existing communication service quality requirement according to the analysis result.
7. The terminal according to claim 5, wherein the radio link layer module is specifically configured to: determining that the quality of the current wireless link cannot meet the existing communication service quality requirement according to a set service quality strategy; the service quality strategy is used for representing the quality index satisfied by the existing communication service.
8. The terminal according to claim 5, wherein the upper layer protocol layer module is specifically configured to: sending an SDP request to the opposite terminal according to the selected media coding format; and receiving the confirmation of the SDP request sent by the opposite terminal.
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| CN102025715A (en) * | 2010-05-17 | 2011-04-20 | 华中科技大学 | SIP (Session Initiation Protocol) protocol-based multimedia network communication method |
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| DE60229482D1 (en) * | 2001-11-24 | 2008-12-04 | Lg Electronics Inc | Method for transmitting packet data in compressed form in a communication system |
| KR20070081810A (en) * | 2006-02-14 | 2007-08-20 | 삼성전자주식회사 | Apparatus and method for packet congestion control in mobile communication system |
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| CN101015222B (en) * | 2004-09-06 | 2010-06-09 | Ut斯达康通讯有限公司 | Dynamic rate control system for multimedia service in IMS system |
| CN102025715A (en) * | 2010-05-17 | 2011-04-20 | 华中科技大学 | SIP (Session Initiation Protocol) protocol-based multimedia network communication method |
| CN104486293A (en) * | 2014-11-25 | 2015-04-01 | 中国电子科技集团公司第三十研究所 | Media negotiation method and system based on network and terminal capability under wireless VoIP (Voice Over Internet Protocol) environment |
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