CN112511998A - Method for improving and adjusting VOLTE voice downlink time delay jitter and terminal equipment - Google Patents
Method for improving and adjusting VOLTE voice downlink time delay jitter and terminal equipment Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/16—Communication-related supplementary services, e.g. call-transfer or call-hold
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0231—Traffic management, e.g. flow control or congestion control based on communication conditions
- H04W28/0236—Traffic management, e.g. flow control or congestion control based on communication conditions radio quality, e.g. interference, losses or delay
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/04—Error control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Abstract
The invention discloses a method for improving and adjusting VOLTE voice downlink time delay jitter, which comprises the following steps: s1, the network detects the downlink decoding success rate of the PDSCH of the VOLTE downlink voice data; s2, the network counts whether the downlink decoding success rate of the VOLTE downlink PDSCH has the condition of periodic NACK, and calculates the periodic NACK and the time length; s3, if the periodic NACK accords with the paging cycle rule, the network actively adjusts the sending time point of the voice data of the downlink VOLTE, and actively avoids the paging conflict, the terminal equipment comprises a memory, a processor, a communication interface and a bus, the memory, the processor and the communication interface are connected through the bus and complete the mutual communication, and the memory is used for storing program codes; the processor executes a program corresponding to the executable program code by reading the executable program code stored in the memory. The invention improves the time delay jitter performance of the uplink VOLTE voice data.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a method and terminal equipment for improving and adjusting VOLTE voice downlink time delay jitter.
Background
In the development of communication technology, mobile communication has undergone a leap-type development from voice service to mobile bandwidth data service, which not only deeply changes people's life style, but also greatly promotes the development of society and economy.
VoLTE is called Voice over Long-Term Evolution (Long Term Evolution Voice bearer) and refers to a high-speed wireless communication standard facing mobile phones and data terminals. It is based on an IP Multimedia Subsystem (IMS) network, using profiles on LTE that are tailored to the Control plane (Control plane) and Media plane (Media plane) for voice services, which enables voice services (Control and Media plane) to be transported as data streams in an LTE data bearer network without the need to maintain and rely on a traditional circuit switched voice network. The radio access technology of 4G is LTE, and the voice over LTE is called VoLTE. The LTE IMS can provide better user experience, has clear voice and short time delay, and can integrate multiple services such as video multimedia, and VoLTE has also become a mainstream voice solution.
Similar to the VoLTE function of 4G, the vonr (voice over New radio) is an important voice call function in the 5G era, and is also one of the core applications of 5G, and this technology enables both the call and the network of the user to really run on the 5G network, resulting in a "real" 5G experience. VoNR has shown that 5G follows the voice architecture of 4G, still providing voice services based on IMS. The radio access technology of 5G is NR, on which the carried voice is called VoNR.
Under the dual-card dual-standby single-pass scheme, during the voice call, the other standby mode cannot process paging data and reselect and switch, and is basically in a similar off-line state. After the voice call is received, the two devices wait to recover normal residence and answer paging.
At present, with the development of LTE and dual-card dual-standby technologies, dual-VOLTE based on VOLTE + VOLTE basically becomes the mainstream technology. At present, the prior art proposes that in the VOLTE call situation, the terminal still maintains another reselection to be performed and monitors another paging to be performed. 201811584249.6 part solves the problem of main and auxiliary cards residing in the same network as the operator. However, monitoring another paging to be performed by a different operator will inevitably cause the degradation of VOLTE tone quality due to the collision of the two cards, and how to improve the VOLTE voice quality in the process of receiving the paging by the secondary card becomes a problem to be solved urgently.
Disclosure of Invention
The present invention aims to provide a method and a terminal device for improving and adjusting the downlink time delay jitter of VOLTE voice, so as to solve the problems proposed in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: the method for improving and adjusting VOLTE voice downlink time delay jitter comprises the following steps:
s1, the network detects the downlink decoding success rate of the PDSCH of the VOLTE downlink voice data;
s2, the network counts whether the downlink decoding success rate of the VOLTE downlink PDSCH has the condition of periodic NACK, and calculates the periodic NACK and the time length;
s3, if the periodic NACK accords with the paging cycle rule, the network actively adjusts the sending time point of the voice data of the downlink VOLTE, and actively avoids the paging conflict.
Preferably, the step S1 includes:
during VOLTE communication, if PS service data exist, the network only sends the VOLTE data and does not send the PS service data at the moment that the VOLTE sends the voice data.
Preferably, the step S1 includes:
during VOLTE communication, if PS service data exists, a network side checks CQI reported by UE, when the network sends voice data in VOLTE, the selected MCS is smaller than the MCS corresponding to the CQI reported by the UE, and if the MCS does not meet the requirement, the size of a downlink PS service data block is properly reduced.
Preferably, the step S2 of network statistics on whether the cyclic NACK condition exists in the downlink decoding success rate of the VOLTE downlink PDSCH includes:
the network can count the time point of NACK in downlink VOLTE downlink voice data HARQ and calculate whether the NACK in the HARK has periodic failure or not;
the network can count the time point of NACK in the HARQ in which downlink VOLTE downlink voice data and PS data are concurrent, and calculate whether the NACK in the HARQ has periodic failure or not;
the network can also count the time point of downlink non-VOLTE voice data transmission, and calculate whether the HARQ transmitted by the non-VOLTE voice data has periodicity.
Preferably, the step S3 includes:
the network can adjust the timing information of the downlink voice packet and avoid the paging conflict period;
the network can also adjust the sending time of the downlink voice packet, does not send downlink data in the paging conflict period, and sends the downlink data after the paging conflict is over;
the network can adjust the sending time of the uplink voice packet, not allocate enough uplink PUSCH channel resources to the terminal in the paging conflict period, and allocate uplink PUSCH scheduling resources to the terminal after the paging conflict period is finished.
Preferably, the network employs LTE, NR or WCDMA.
The terminal device is used for executing the conversation communication method and is characterized by comprising a memory, a processor, a communication interface and a bus, wherein the memory, the processor and the communication interface are connected through the bus and complete mutual communication, and the memory is used for storing program codes; the processor executes a program corresponding to the executable program code by reading the executable program code stored in the memory.
Compared with the prior art, the invention has the beneficial effects that:
in the invention, the UE is a dual-card dual-standby single-pass mobile phone, and the terminal continues to monitor another standby paging message when performing VOLTE voice call.
The network detects the downlink decoding success rate of the downlink voice data PDSCH of the VOLTE, the network counts whether the downlink decoding success rate of the downlink PDSCH of the VOLTE has the periodic NACK condition, and if the downlink decoding success rate of the downlink PDSCH of the VOLTE fails to have the periodic rule, the network calculates the periodic time length and the duration time length of the HARQ periodic NACK. If the periodic NACK accords with the paging period rule, the network actively adjusts the sending time point of the voice data of the downlink VOLTE, actively avoids paging conflict and improves the time delay jitter performance of the voice data of the downlink VOLTE.
In addition, the network can adjust the transmission time of the uplink voice packet, and not allocate enough uplink PUSCH channel resources to the terminal in the paging collision period. And after the paging conflict period is ended, allocating uplink PUSCH scheduling resources to the terminal. So as to improve the time delay jitter performance of uplink VOLTE voice data.
Drawings
FIG. 1 is a general diagram illustrating a network evaluating an error rate of downlink voice data to dynamically adjust a downlink transmission time of voice;
fig. 2 is a schematic diagram of VOLTE voice data 20ms intervals;
fig. 3 is a schematic diagram of network delayed transmission of downlink VOLTE voice data;
fig. 4 is a schematic diagram illustrating that the network determines whether to not allocate uplink VOLTE voice channel resources;
FIG. 5 is a diagram illustrating a network determining whether to reduce the PS rate for the CS + PS data concurrency condition;
fig. 6 is a schematic diagram illustrating that the UE periodically performs listening paging at GAP intervals;
fig. 7 is a schematic diagram of short GAP interval and RTP downstream voice time overlap;
FIG. 8 is a schematic diagram of long GAP interval and RTP downstream voice time overlap;
fig. 9 is a functional diagram of a terminal.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-9, the present invention provides a technical solution: the Terminal referred in the embodiments of the present invention may also be referred to as User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (Mobile Terminal), or the like. The terminal is capable of communicating with one or more core networks via a Radio Access Network (RAN), and may be, for example, a mobile telephone (or "cellular" telephone).
The logical hierarchy of the terminal is shown in fig. 1, and includes an application layer (App), a Non-Access Stratum (NAS), and an Access Stratum (AS).
Specifically, the protocol stack of the universal mobile telecommunications system can be divided into NAS protocol and AS protocol. The NAS protocol handles the transmission of information between the terminal and the core network, and the content of the transmission may be user information or control information, such as establishment and release of services or mobility management information. The NAS message is to some extent independent of the AS protocol structure, independent of what radio access network is accessed. The radio access network here includes LTE, NR, and the like. The AS protocol mainly processes flows such AS cell selection, radio resource management and the like.
For simplicity of description, the standby card for performing VOLTE call is set as the master card. The other one is to be a secondary card. The above-mentioned primary and secondary cards have no direct relation with the actual physical primary and secondary cards and the primary and secondary cards set by the PS.
For better understanding of the present invention, the following describes in detail a method for improving and adjusting the downlink time delay jitter of VOLTE voice according to the present invention with reference to the accompanying drawings, and it should be noted that these embodiments are not intended to limit the scope of the present disclosure.
Suppose that the UE supports a dual-card dual-standby single-pass mobile phone, two cards, i.e., SIM1 and SIM2, are inserted into the UE, the HPLMNs are PLMN1 and PLMN1, respectively, and the RPLMNs that reside are PLMN1 and PLMN2, respectively.
The PS master card is selected as SIM1 and the PS data service is open source.
And the UE normally registers VOLTE service. Both to camp on the LTE network.
The UE makes a voice call on the SIM1, during which the UE periodically listens for secondary card pages.
In the LTE system, the paging cycle setting may take the values of rf32, rf64, rf128 and rf 256.
In this embodiment, a default pagingcycle in the PLMN2 where the secondary card resides is set to 128, and T is 128; nB is set to T, i.e., 128, then N — 128; ns 1.
| -Ns：max(1，nB/T) | 1 |
Fig. 1 is a detailed flow chart illustrating an embodiment of the present invention. The method comprises the following steps:
and in the uplink and downlink voice data part, the used VOLTE voice sampling rate is 8000kbps, and the RTP packet interval is 20ms.
The QOS parameters set by the VOLTE network are as follows:
the audio parameters negotiated for voltepack are as follows:
the RLC layer is configured as follows:
the CQI reporting configuration is as follows:
maxHARQ-Tx is set to 5.
Step S101, the network detects the downlink decoding success rate of the PDSCH of the VOLTE downlink voice data, and the specific process is as follows:
a downlink VOLTE voice RTP packet interval of 20ms. may be specifically referred to as shown in fig. 2.
The network records the HARQ transmission time of each downlink VOLTE voice data RTP packet and the condition of the FeedBack received by the PDCCH
Step S102, network checks whether there is periodicity regularity in the time distribution of the voice data packet NACK, the concrete process is as follows:
if the feeder back is Nack for many times within a certain time T1, the UE starts periodic check evaluation.
The network filters out RTP packets with the FeedBack back being NACK.
| Time of transmission | FeedBack | |
| RTP m1 | T m1 | NACK |
| RTP m2 | T m2 | NACK |
| RTP m3 | T m3 | NACK |
| … | ||
| RTP mn | T m3 | NACK |
The network calculates the time interval of the sending time of the RTP packet with the FeedBack as the NACK interval
| Time of transmission | Toff | |
| RTP m1 | T m1 | - |
| RTP m2 | T m2 | Toff1 |
| RTP m3 | T m3 | Toff2 |
| … | ||
| RTP mn | T m3 | Toff3 |
It is preliminarily determined whether there is an approximate periodic and regular distribution between Toff1, Toff2, Toff 3. If yes, go to step S103;
step S103, calculating the period time length and the duration time length of the HARQ periodic NACK, which includes the following specific processes:
the network calculates the maximum possible periodicity Tperiod and the duration length P Tperiod.
For example, in this example Tperiod is calculated to be equal to 1.29s.
Step S104, whether the period accords with the paging period rule or not is judged, and the specific process is as follows:
calculating the difference between Tperiod and the set of possible paging cycles Psets (0.32,0.64,1.28,2.56 s);
Doff1＝Abs(Tperiod-0.32)
Doff2＝Abs(Tperiod-0.64)
Doff3＝Abs(Tperiod-1.28)
Doff4＝Abs(Tperiod-2.56)
take min (Doff1, Doff2, Doff3, Doff4) to Doff
If Doff is less than a threshold H1, e.g., 0.2s, then the value corresponding to Doff is the detected paging cycle. The time instant of the corresponding NACK is the paging time point.
It should be noted that this is merely an example, and other methods of calculating the evaluation period are within the scope of this patent.
When the dual-card dual-standby is performed, the UE is in a state of performing a CS service, and if the UE monitors another to-be-paged, if the two to-be-paged PLMNs do not belong to the same PLMN, the UE needs to calculate a GAP time to perform another paging monitoring and measurement. The GAP period is performed according to another standby paging period. See in particular the schematic of fig. 6.
Therefore, the GAP period is generally set according to the paging period 0.32,0.64,1.28,2.56s, and during the GAP, the UE cannot send and receive data. And these periods are all integer back of 20ms. Once the GAP and RTP packet transmission times coincide, at least 1 RTP packet per 16/32/64/128 RTP will affect the GAP and require HARQ retransmission for recovery.
| Paging cycle | RTP packet interval | Multiple of | |
| 0.32s | 20ms | 16 | |
| 0.64s | 20ms | 32 | |
| 1.28s | 20ms | 64 | |
| 2.56s | 20ms | 128 | |
The GAP length needs to determine whether another cell needs to be measured, and the number of cell types measured in the neighboring cell is determined, generally, the shortest cell needs 4 TTIs, and if the length is long, the length needs about 30 to 40ms, or even more.
Therefore, the probability of the above case, p ═ GAP duration/20 ms, can be calculated
Fig. 7 and 8 illustrate the effect of short GAPs and long GAPs, respectively.
If the terminal judges that the UE has a periodic paging monitoring process, the step S105 is entered;
step S105, actively adjusting the sending time point of the voice data of the downlink VOLTE, which specifically includes the following steps:
the network actively adjusts the sending time point of the voice data of the downlink VOLTE, actively avoids paging conflict and improves the time delay jitter performance of the voice data of the downlink VOLTE. See in particular the example of fig. 3.
The time length of the delayed sending is obtained according to dynamic adjustment calculation or a value calculated through PS domain data estimation. It is also possible to obtain by the time fluctuation situation of the uplink transmission situation.
In addition, the network can adjust the transmission time of the uplink voice packet, and not allocate enough uplink PUSCH channel resources to the terminal in the paging collision period. And after the paging conflict period is ended, allocating uplink PUSCH scheduling resources to the terminal. To improve the time delay jitter performance of uplink VOLTE voice data, for example, the following specific process is shown in fig. 4.
The length of time for delaying transmission may be 1, or 4, or a value calculated by PS domain data estimation.
During VOLTE conversation, if PS service data exists, the network side checks CQI reported by UE. When the network sends voice data in VOLTE, the selected MCS is less than or equal to the MCS corresponding to the CQI reported by the UE.
If not, the size of the downlink PS service data block is properly reduced.
For example, the following is an example, and the specific process is shown in fig. 5.
It is to be understood that the invention is not limited to the specific arrangements and instrumentality described above and shown in the drawings. A detailed description of known methods is omitted herein for the sake of brevity. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present invention are not limited to the specific steps described and illustrated, and those skilled in the art can make various changes, modifications and additions or change the order between the steps after comprehending the spirit of the present invention.
The functional blocks shown in the above-described structural block diagrams may be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it may be, for example, an electronic circuit, an Application Specific Integrated Circuit (ASIC), suitable firmware, plug-in, function card, or the like. When implemented in software, the elements of the invention are the programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine-readable medium or transmitted by a data signal carried in a carrier wave over a transmission medium or a communication link. A "machine-readable medium" may include any medium that can store or transfer information. Examples of a machine-readable medium include electronic circuits, semiconductor memory devices, ROM, flash memory, Erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, Radio Frequency (RF) links, and so forth. The code segments may be downloaded via computer networks such as the internet, intranet, etc.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The method for improving and adjusting VOLTE voice downlink time delay jitter is characterized in that: the method comprises the following steps:
s1, the network detects the downlink decoding success rate of the PDSCH of the VOLTE downlink voice data;
s2, the network counts whether the downlink decoding success rate of the VOLTE downlink PDSCH has the condition of periodic NACK, and calculates the periodic NACK and the time length;
s3, if the periodic NACK accords with the paging cycle rule, the network actively adjusts the sending time point of the voice data of the downlink VOLTE, and actively avoids the paging conflict.
2. The method for improving and adjusting downlink time delay jitter of VOLTE voice according to claim 1, wherein: the step S1 includes:
during VOLTE communication, if PS service data exist, the network only sends the VOLTE data and does not send the PS service data at the moment that the VOLTE sends the voice data.
3. The method for improving and adjusting downlink time delay jitter of VOLTE voice according to claim 1, wherein: the step S1 includes:
during VOLTE communication, if PS service data exists, a network side checks CQI reported by UE, when the network sends voice data in VOLTE, the selected MCS is smaller than the MCS corresponding to the CQI reported by the UE, and if the MCS does not meet the requirement, the size of a downlink PS service data block is properly reduced.
4. The method for improving and adjusting downlink time delay jitter of VOLTE voice according to claim 1, wherein: the step S2 of the network counting whether the cyclic NACK condition exists in the downlink decoding success rate of the VOLTE downlink PDSCH includes:
the network can count the time point of NACK in downlink VOLTE downlink voice data HARQ and calculate whether the NACK in the HARK has periodic failure or not;
the network can count the time point of NACK in the HARQ in which downlink VOLTE downlink voice data and PS data are concurrent, and calculate whether the NACK in the HARQ has periodic failure or not;
the network can also count the time point of downlink non-VOLTE voice data transmission, and calculate whether the HARQ transmitted by the non-VOLTE voice data has periodicity.
5. The method for improving and adjusting downlink time delay jitter of VOLTE voice according to claim 1, wherein: the step S3 includes:
the network can adjust the timing information of the downlink voice packet and avoid the paging conflict period;
the network can also adjust the sending time of the downlink voice packet, does not send downlink data in the paging conflict period, and sends the downlink data after the paging conflict is over;
the network can adjust the sending time of the uplink voice packet, not allocate enough uplink PUSCH channel resources to the terminal in the paging conflict period, and allocate uplink PUSCH scheduling resources to the terminal after the paging conflict period is finished.
6. The method for improving and adjusting downlink time delay jitter of VOLTE voice according to claim 1, wherein: the network employs LTE, NR or WCDMA.
7. Terminal device for performing the method according to any of claims 1 to 6, comprising a memory, a processor, a communication interface and a bus, the memory, the processor and the communication interface being connected via the bus and performing communication with each other, the memory being adapted to store program code; the processor executes a program corresponding to the executable program code by reading the executable program code stored in the memory.
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