CN101330700B - Method for scheduling ascending IP load-bearing voice service - Google Patents
Method for scheduling ascending IP load-bearing voice service Download PDFInfo
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Abstract
The invention discloses a method for scheduling the upstream IP carried voice service, which comprises the following steps: (1) a base station detects the state of the downstream IP carried voice service; (2) a timer is started up when the base station detects that the downstream IP carried voice service enters the silent state from the call state; (3) after the timer works overtime, the base station distributes upstream resources to a terminal corresponding to the downstream IP carried voice service according to specific periods; (4) the terminal sends the state switching report of the upstream IP carried voice service; (5) the base station distributes resources to the upstream IP carried voice service in a continuously scheduling manner. By comparing the method disclosed by the invention with the prior art, not only the real time requirement of the upstream VoIP scheduling service can be met, but also the complexity of the system is reduced and the utilization efficiency of the system resources is improved.
Description
Technical Field
The invention relates to the field of wireless communication, in particular to a method for realizing uplink Voice over IP (Voice over IP) service scheduling in a wireless communication system consisting of a base station and a terminal.
Background
As shown in fig. 1, the wireless communication system mainly includes a terminal 110, a base station 120, and a core network 130. The base stations 120 may be logically or physically connected as needed, and a network formed by the base stations 120 is called a radio Access network (ran) (radio Access network) and is responsible for Access layer transactions, such as management of radio resources; and the uplink and downlink wireless resources are scheduled by the base station in a mode of sharing the channel. The base stations 120 are all connected to a core network 130, and each base station 120 may be connected to one or more core network cn (core network) nodes 130. The core network 130 is responsible for non-access stratum transactions such as charging, location management, etc. The terminal 110 refers to a device that can communicate with a network, such as a mobile phone or a notebook computer. Each terminal 110 is typically connected to only one base station in the network in the uplink direction.
In the existing wireless communication systems such as LTE (Long Term Evolution) and WiMAX (worldwide interoperability for Microwave Access), for an uplink shared channel, a base station scheduling method is adopted to control uplink transmissions of different terminals, so as to improve the channel utilization rate. The one-time complete uplink scheduling generally includes four processes of sending an uplink scheduling information report by a terminal, scheduling and authorizing by a base station, issuing authorization, and transmitting uplink by the terminal according to authorization, referring to fig. 2, the specific process is as follows:
step S210, the terminal sends an uplink scheduling information report to the base station periodically or under the trigger of an event;
step S220, the base station distributes resources for the terminals according to a certain strategy according to the available resource condition and the uplink scheduling information of all the terminals;
step S230, the base station sends the authorization information sent by the uplink to the terminal;
step S240, the terminal transmits data and control information in an uplink mode according to the authorization information transmitted in the uplink mode;
in step S210, the terminal needs to report its uplink scheduling information to the base station, where the uplink scheduling information mainly includes the status of each buffer queue and the like.
It is easy to see that the uplink scheduling process has a long delay, and uplink data with a strict requirement on real-time performance is not suitable for the uplink scheduling process. For the uplink VoIP service, because the data reaches at periodic intervals and the size of the data packet is regular, a persistent scheduling mode is often adopted, that is, the base station periodically allocates resources to the uplink VoIP service, and the terminal does not need to make a resource request for uplink data transmission each time. However, there are two states of talk and silence in the VoIP service, and when the VoIP service enters the silence state, the base station should release the resources allocated for the talk state to improve the utilization rate of the system resources. Therefore, when the uplink VoIP service enters the talk state from the silence state, the base station needs to reallocate the resource for transmitting the uplink data packet. Thus, the base station needs to know the state transition of the uplink VoIP traffic from silence to talk. When the uplink VoIP traffic is converted from silence to a talk state, a method of notifying the base station by the terminal is generally employed. Such notification may use both the reserved uplink resources and the uplink random access channel. The reservation of uplink resources for the report easily causes resource waste, and the use of an uplink random access channel has the problem of uncertain access delay, which may cause packet loss. Considering that VoIP services usually occur in pairs of uplink and downlink, and the call states of uplink and downlink appear alternately, a method for a base station to schedule its corresponding uplink VoIP service according to the downlink VoIP service is proposed herein.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a method for implementing uplink VoIP service scheduling in a wireless communication system composed of a base station and a terminal, so as to solve the problems in the prior art that the uplink scheduling process has a long time delay, so that uplink data with strict real-time requirements is no longer suitable for adopting the scheduling process.
In order to solve the above problem, the present invention provides a method for implementing uplink VoIP service scheduling in a wireless communication system composed of a base station and a terminal. The method is also adapted for scheduling of other uplink traffic where there is corresponding downlink traffic and the arrival of uplink traffic is associated with the behavior of downlink traffic. The method comprises the following steps:
(1) a base station detects the state of a downlink VoIP service;
(2) when the base station detects that the downlink VoIP service enters a silent state from a call state, a timer is started;
(3) after the timer is overtime, the base station distributes uplink resources to the terminal corresponding to the downlink VoIP service according to a specific period;
(4) the terminal sends a state conversion report of the uplink VoIP service;
(5) a base station allocates resources for uplink VoIP service according to a continuous scheduling mode;
the method of the present invention, wherein the step (3) further comprises: if the timer is not overtime or the downlink VoIP service enters the conversation state again in the period of the active authorization of the base station to the uplink VoIP service, the base station stops the active authorization of the uplink VoIP service, the timer is cleared, and the step (1) is executed;
further, the method of the present invention, wherein the active authorization is an active authorization reporting a state transition condition that the uplink VoIP service enters the call from silence;
further, in the method of the present invention, in step (5), the persistent scheduling means is that the base station periodically allocates resources to the uplink VoIP service when the terminal does not make a resource request for transmitting uplink data;
furthermore, the method of the present invention, wherein the value of the timer is the time interval prediction of the arrival of the first uplink VoIP data packet after the base station switches the downlink VoIP service to the silent state;
further, the method of the present invention, wherein the value of the timer is adjusted by the base station in a self-adaptive manner, that is, continuously re-identifying and revising according to the actual interval of the first uplink VoIP data arrival;
further, the method of the present invention, wherein the state transition report is used to report a state transition situation from silence to talk of the uplink VoIP service.
Compared with the prior art, the method of the invention can not only meet the real-time requirement of the uplink VoIP service, but also reduce the complexity of the system and improve the utilization efficiency of the system resources.
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FIG. 1 is a diagram illustrating a prior art wireless communication system;
fig. 2 is a schematic diagram of an uplink VoIP service scheduling process of a wireless communication system in the prior art;
fig. 3 is a flowchart of an uplink VoIP state transition reporting method according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a method for reporting uplink VoIP status transition in an embodiment of the present invention.
Detailed Description
In order to solve the drawbacks of the conventional technical solutions, the present invention further provides a method for implementing uplink IP bearer voice service scheduling according to the following specific embodiments, which are described in detail below, but are not intended to limit the present invention. The technical scheme specifically describes the method for scheduling the corresponding uplink VoIP service by the base station according to the downlink VoIP service by using the VoIP (Voice over Internet Protocol) service.
Fig. 3 is a flowchart of an uplink VoIP state transition reporting method according to an embodiment of the present invention. The method comprises the following steps:
step S301, a base station detects the state of a downlink VoIP service; if detecting that the downlink VoIP service starts to enter a silent state from a conversation state, starting to execute the next step; otherwise, not processing;
step S302, when the downlink VoIP service enters a silent state from a conversation state, a base station starts a timer;
the value of the timer is that the arrival interval of the first uplink VoIP data packet is predicted after the base station converts the downlink VoIP service into the silent state; the base station can carry out parameter adjustment in a self-adaptive mode, namely, the base station continuously re-identifies and corrects the parameters according to the actual arrival interval of the first uplink VoIP data packet;
step S303, after the timer is overtime, the base station actively distributes uplink resources to the terminal corresponding to the downlink VoIP service according to a specific period;
if the timer is not overtime, no processing is carried out;
in addition, if the timer is not overtime or during the period of the base station actively authorizing the uplink VoIP service, the downlink VoIP service enters the conversation state again, the base station stops the active authorization for the uplink VoIP service, the timer is cleared, and the step S301 is executed again;
the active authorization is the active authorization for reporting the state transition condition that the uplink VoIP service enters the conversation from silence;
step S304, the terminal sends a state conversion report from silence to conversation of the uplink VoIP service;
step S305, the base station periodically allocates resources to the uplink VoIP service according to the persistent scheduling mode, and the terminal does not need to make resource request for uplink VoIP data transmission each time.
Fig. 4 is a schematic diagram illustrating a method for reporting an uplink VoIP state transition in an embodiment of the present invention.
Wherein,
indicating an active grant for reporting an upstream VoIP silence/talk state transition,indicating an uplink VoIP silence/talk state transition report.
In the figure, the downlink VoIP service is in a conversation state at first, and the uplink VoIP service is in a silence state. After the downlink VoIP service is converted from the conversation state to the silence state, the base station sets a timer according to the prediction of the moment of converting the uplink VoIP service from the silence state to the conversation state. And after the timer is overtime, the base station actively allocates uplink resources to the terminal. The figure shows that the base station receives the report of the transition from silence to conversation state of the uplink VoIP service after three times of active authorization. Then, the base station adopts a continuous scheduling mode to schedule the uplink VoIP service.
The invention is suitable for all the uplink services which have corresponding downlink services and the arrival of the uplink services has certain relation with the behaviors of the downlink services. For example, for uplink TCP ACK/NACK data, the base station may predict the time for the corresponding uplink TCP ACK/NACK data to reach the terminal according to the success of downlink TCP data transmission at the air interface, and then actively allocate uplink resources to the uplink TCP ACK/NACK data, so that the TCP ACK/NACK data can be uploaded as soon as possible, and the transmission rate of TCP connection is increased.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it is therefore intended that all such changes and modifications as fall within the true spirit and scope of the invention be considered as within the following claims.
Claims (6)
1. A method for realizing uplink IP bearing voice service scheduling is characterized by comprising the following steps:
(1) the base station detects the state of the voice service carried by the downlink IP;
(2) when the base station detects that the downlink IP voice-bearing service enters a silent state from a conversation state, a timer is started;
(3) after the timer is overtime, the base station distributes uplink resources to the terminal corresponding to the downlink IP voice-bearing service according to a specific period;
(4) the terminal sends a state conversion report from silence to conversation of the uplink IP voice-bearing service;
(5) and the base station allocates resources for the uplink IP voice-bearing service according to a continuous scheduling mode.
2. The method of claim 1, wherein step (3) further comprises:
if the downlink IP voice-bearing service enters the conversation state again during the time that the timer is not overtime, the base station stops the active authorization of the uplink IP voice-bearing service, the timer is cleared, and the step (1) is returned to be executed.
3. The method of claim 2, wherein the active grant is an active grant reporting a state transition situation where uplink voice over IP traffic is entering a call from silence.
4. The method of claim 1, wherein in step (5), the persistent scheduling scheme is that the base station periodically allocates resources to the uplink voice over IP service when the terminal does not make a resource request for transmitting uplink data.
5. The method of claim 1, wherein the value of the timer is a time interval prediction of the arrival of the first uplink voice-over-IP service packet after the base station transitions the downlink voice-over-IP service to the silent state.
6. The method of claim 5, wherein the value of the timer is adaptively adjusted by the base station by continually re-identifying and modifying the value according to the actual arrival interval of the first uplink IP bearer voice service packet.
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| CN2007101115182A CN101330700B (en) | 2007-06-19 | 2007-06-19 | Method for scheduling ascending IP load-bearing voice service |
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| CN2007101115182A CN101330700B (en) | 2007-06-19 | 2007-06-19 | Method for scheduling ascending IP load-bearing voice service |
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| JP6120840B2 (en) | 2011-07-13 | 2017-04-26 | エンパイア テクノロジー ディベロップメント エルエルシー | Voice over internet protocol service |
| EP3474581B1 (en) | 2016-07-27 | 2021-03-31 | Huawei Technologies Co., Ltd. | Method and device for negotiating maximum packaging interval |
| CN109413738A (en) * | 2017-08-17 | 2019-03-01 | 中兴通讯股份有限公司 | Distribute method, apparatus and the base station of voice service interface-free resources |
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| CN1401170A (en) * | 2000-02-14 | 2003-03-05 | 诺基亚公司 | Emulating of information flow |
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