WO2013155839A1

WO2013155839A1 - Ack/nack information transmission method and device

Info

Publication number: WO2013155839A1
Application number: PCT/CN2012/085158
Authority: WO
Inventors: 王勇; 王继征
Original assignee: 大唐移动通信设备有限公司
Priority date: 2012-04-16
Filing date: 2012-11-23
Publication date: 2013-10-24
Also published as: CN102647263B; CN102647263A

Abstract

An ACK/NACK information transmission method and device. The method comprises: a base station device obtaining a service type corresponding to a terminal device; when the service type corresponding to the terminal device is a designated service type, the base station device sending scheduling information for an uplink subframe to the terminal device; and after receiving the scheduling information for the uplink subframe, the terminal device sending the ACK/NACK information to the base station device through a physical uplink shared channel (PUSCH). According to the embodiment of this application, the ACK/NACK information can be fed back in time, the feedback waiting time is shortened, the low-delay service demands of webpage browsing, videophone, synchronous shooting and uploading and the like can be met, and the user experience is improved.

Description

Method and device for transmitting ACK/NACK information

The present application relates to the field of communications technologies, and in particular, to a method and a device for transmitting ACK (ACKnowledgement)/NACK (Negative ACKnowledgement) information. Background technique

In the LTE (Long Term Evolution) system, in order to support the normal operation of the uplink and downlink channels, the terminal device needs to send control information related to the transmission (ie, positive acknowledgement ACK/negative acknowledgement NACK information) to the base station device, for replying The transmission of the service data of the PDSCH (Physical Downlink Shared Channel); wherein, if the terminal device correctly receives and demodulates the transmitted data, the ACK information is fed back to the base station device, otherwise the NACK information is fed back.

In the prior art, after the terminal device needs to feed back the ACK/NACK information to the base station device, the terminal device determines whether there is an uplink PUSCH (Physical Uplink Shared Channel) service, if there is an uplink PUSCH service. Then, the terminal device separately encodes the ACK/NACK information and the uplink data, and multiplexes the transmission in the PUSCH; if there is no uplink PUSCH service, the terminal device uses a dedicated PUCCH (Physical Uplink Control Channel, physical) in the subframe. The uplink control channel) transmits ACK/NACK information.

It should be noted that, if a feedback period is set for the PUCCH, according to the protocol requirement, the terminal device needs to perform ACK/NACK information transmission at the set cycle time point, otherwise, it enters the waiting process, and the terminal device waits until the PUCCH cycle time point. The ACK/NACK information is reported to the base station device.

In the process of implementing the present application, the inventors have found that at least the following problems exist in the prior art: Since ACK/NACK information is not sent to the base station device when waiting to the PUCCH cycle time point, the ACK/NACK information cannot be fed back in time, so that Shortcomings such as poor real-time performance and high business latency; For example, according to the actual test feedback, there will be a delay of nearly 20ms, and the delay will seriously affect the perception of the user's application services (for example, Internet access and video calls, etc.). Summary of the invention

The embodiment of the present application provides a method and a device for transmitting ACK/NACK information, and timely feedback.

ACK/NACK information, reducing feedback waiting time, meeting low-latency service requirements.

In order to achieve the above objective, the embodiment of the present application provides a method for transmitting a positive acknowledgement ACK/negative acknowledgement NACK information, where the method includes:

The base station device obtains a service type corresponding to the terminal device;

When the service type corresponding to the terminal device is the specified service type, the base station device sends scheduling information for the uplink subframe to the terminal device;

After receiving the scheduling information for the uplink subframe, the terminal device sends the ACK/NACK information to the base station device by using the physical uplink shared channel PUSCH.

An embodiment of the present application provides a base station device, including:

Obtaining a module, configured to obtain a service type corresponding to the terminal device;

a sending module, configured to send, to the terminal device, scheduling information for an uplink subframe, when the service type corresponding to the terminal device is a specified service type;

After receiving the scheduling information for the uplink subframe, the terminal device sends a positive acknowledgement ACK/negative acknowledgement NACK information to the base station device by using the physical uplink shared channel PUSCH.

Compared with the prior art, the embodiment of the present application has at least the following advantages: In the embodiment of the present application, the ACK/NACK information can be fed back in time, the feedback waiting time is reduced, and the web browsing, video telephony, instant photo transmission, etc. are satisfied. The business requirements of the delay increase the user experience. DRAWINGS

In order to explain the technical solutions of the present application more clearly, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only one of the present application. For the embodiments, those skilled in the art can obtain other drawings according to the drawings without any creative work.

1 is a flowchart of a method for transmitting ACK/NACK information according to Embodiment 1 of the present application; FIG. 2 is a flowchart of a method for transmitting ACK/NACK information according to Embodiment 2 of the present application; A schematic structural diagram of a base station device provided in Example 3. detailed description

The technical solutions in the present application are clearly and completely described in the following with reference to the drawings in the present application. It is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without departing from the scope of the invention are within the scope of the present invention.

Embodiment 1

The first embodiment of the present application provides a method for transmitting ACK/NACK information, based on the requirements of the PDSCH uplink feedback technology and the protocol standard of the LTE system, and proposes a pre-scheduling based on the service requirements for real-time high and low delay. The mechanism reduces the processing method of the service delay, thereby satisfying the service requirement of low delay. As shown in FIG. 1, the method includes the following steps:

Step 101: The base station device obtains a service type corresponding to the terminal device.

Step 102: When the service type corresponding to the terminal device is the specified service type, the base station device sends scheduling information for the uplink subframe to the terminal device. It should be noted that, when the service type corresponding to the terminal device is not the specified service type, the corresponding processing manner is not described in this embodiment.

In the embodiment of the present application, the specified service type includes but is not limited to: a service type that requires a delay to be less than a preset threshold; in an actual application, a preferred preset threshold is 10 ms; and the delay is less than a preset threshold. The type of service, which can meet the requirements of high real-time requirements and low latency; for example, web browsing, video telephony, instant messaging, etc.

Step 103: After receiving the scheduling information for the uplink subframe, the terminal device passes the PUSCH to The base station device transmits ACK/NACK information.

It is to be noted that, if the terminal device receives the scheduling information for the uplink subframe sent by the base station device, it indicates that the uplink PUSCH service exists, and the terminal device needs to separately encode the ACK/NACK information and the uplink data, and then through the PUSCH. The base station device multiplexes and transmits the ACK/NACK information and the uplink data. If the terminal device does not receive the scheduling information for the uplink subframe sent by the base station device, the uplink PUSCH service does not exist, and the terminal device needs to be in the uplink subframe. The ACK/NACK information is transmitted using a dedicated PUCCH.

Based on this, in the embodiment of the present application, the base station device sends the uplink subframe to the terminal device for the specified service type (such as web browsing, video telephony, instant messaging, etc.), which has high real-time and low latency service characteristics. The scheduling information enables the terminal device to receive the scheduling information for the uplink subframe sent by the base station device, and then transmits the ACK/NACK information to the base station device through the PUSCH, thereby overcoming the time waiting problem when the ACK/NACK information is fed back using the PUCCH period. The ACK/NACK information can be fed back in time to meet the requirements of low latency services using LTE technology.

In the embodiment of the present application, the pre-scheduling switch can be dynamically adjusted according to the service requirement, and the uplink feedback mode of the terminal device is revised in real time to reduce the feedback waiting time. Based on this, the base station device sends the scheduling information for the uplink subframe to the terminal device, including: After the base station device learns that the service type corresponding to the terminal device is the specified service type, the base station device starts the pre-scheduling switch for the terminal device, and after the pre-scheduling switch is enabled, the base station device sends the scheduling information for the uplink subframe to the terminal device.

In the embodiment of the present application, the pre-scheduled traffic volume may be dynamically set according to the priority of the terminal device, so as to ensure that the terminal device with a high priority can minimize the service delay. Based on this, the method further includes: the base station device according to the terminal The priority of the device is set to the pre-scheduled traffic of the terminal device, and the higher the priority of the terminal device is, the larger the pre-scheduled traffic is; and the base station device sends the scheduling information for the uplink subframe to the terminal device. The scheduling information carries the preset pre-scheduled traffic, and after receiving the scheduling information for the uplink subframe, the terminal device sends the ACK/NACK information to the base station device by using the set pre-scheduling traffic. Specifically, the base station device sets the pre-scheduling traffic for the terminal device according to the priority corresponding to the terminal device, and the base station device starts the pre-scheduling switch for the terminal device after the service type corresponding to the terminal device is the specified service type, and is pre-scheduled. After the switch is enabled, the pre-scheduled traffic is set for the terminal device according to the priority of the terminal device.

In summary, in the embodiment of the present application, when the terminal device feeds back ACK/NACK information based on the PUCCH channel period, if the feedback time is not the cycle time point set by the PUCCH, the terminal device needs to wait continuously, thereby solving the terminal device. The ACK/NACK information cannot be fed back in time, which leads to poor real-time performance and high service delay.

By dynamically adjusting the size of the pre-scheduling switch and the pre-scheduled traffic, the base station device can ensure that the terminal devices of different priorities have persistent PUSCH scheduling in real time, so that the terminal device can be on the PUSCH channel without violating the protocol standard. Timely feedback of ACK/NACK information to meet business requirements such as web browsing, video telephony, instant messaging, etc. for low latency.

The technical solution provided by the embodiment of the present application does not involve tampering of the air interface private interface message, and the setting of the pre-scheduling switch is simple, and the DSP (Digital Signal Processing) processing does not constitute a load. The demodulation and decoding performance of the base station equipment and the terminal equipment have no effect, and the scheme has small processing capacity, low complexity, and simple implementation.

Embodiment 2

The second embodiment of the present application provides a method for transmitting ACK/NACK information, by setting a pre-scheduling switch for a terminal device that newly accesses the network (the pre-scheduling switch is effective before and after the cell is established, before and after the terminal device is accessed), and pre-scheduling. The size of the traffic, and the pre-scheduling switch is turned on/off in real time, so that the terminal device can always receive the scheduling information of the current uplink subframe sent by the base station device, and further ensure that the terminal device timely feedbacks the ACK/NACK information without waiting. The cycle time point of the periodic PUCCH reduces the waiting time and satisfies the real-time requirements of the service.

As shown in FIG. 2, the method for transmitting the ACK/NACK information may include the following steps: Step 201: The terminal device successfully accesses the LTE network to establish multiple service bearers. Step 202: The base station device sets a pre-scheduling switch for the terminal device, and starts a pre-scheduling switch according to the service type or turns off the pre-scheduling switch. The base station device turns on the pre-scheduling switch for the terminal device when the service type corresponding to the terminal device is the specified service type. When the service type corresponding to the terminal device is not the specified service type, the base station device turns off the pre-scheduling switch for the terminal device.

In the embodiment of the present application, if the current application of the terminal device, such as web browsing, video telephony, and instant messaging, has a real-time high-low-delay service requirement (ie, a specified service type), the pre-scheduling switch is turned on. The terminal device ensures that the scheduling information of the current uplink subframe sent by the base station device is always received, so that the ACK/NACK information of the terminal device is timely fed back on the PUSCH channel.

It should be noted that, if the pre-scheduling switch is disabled, the corresponding PUCCH feedback time period needs to be set on the control software of the base station device, and the terminal device cannot always receive the scheduling information of the current uplink subframe sent by the base station device. The ACK/NACK information of the terminal device cannot be guaranteed to be timely feedback on the PUSCH channel. In this case, the terminal device can feed back ACK/NACK information through the PUCCH, that is, the service requirement of high real-time and low delay cannot be guaranteed.

In the embodiment of the present application, the following description is performed by using the pre-scheduling switch as an example. The method may further include the following steps:

Step 203: The base station device sets the pre-scheduled traffic volume for the terminal device according to the priority corresponding to the terminal device, and the higher the priority corresponding to the terminal device, the larger the pre-scheduling traffic volume.

In the embodiment of the present application, when the corresponding pre-scheduled traffic is set according to the priority of the terminal device, if the terminal device is a high-priority terminal device, the large traffic pre-scheduling is enabled; if the terminal device is low For priority terminal devices, small traffic pre-scheduling is enabled.

It should be noted that the larger the pre-scheduling traffic setting value (the value is between 0 and 63 according to the 3GPP TS36.213 protocol), the more resources are allocated by the terminal device in a single time, and the transmission of the large data volume uplink packet is required. The smaller the delay, that is, the smaller the transmission delay of the ACK/NACK information.

Step 204: The base station device sends scheduling information for the uplink subframe to the terminal device, where the scheduling information carries the preset pre-scheduling traffic. The terminal device receives the tone for the uplink subframe. After the degree information, the ACK/NACK information is transmitted to the base station device through the PUSCH.

It should be noted that, when the pre-scheduling switch is turned on, the terminal device feeds back ACK/NACK information to the base station device through the PUSCH channel; if the terminal device turns off the pre-scheduling switch, the terminal device feeds back ACK/ to the base station device through the PUCCH channel. NACK information.

In summary, in the embodiment of the present application, when the terminal device feeds back ACK/NACK information based on the PUCCH channel period, if the feedback time is not the cycle time point set by the PUCCH, the terminal device needs to wait continuously, thereby solving the terminal device. The ACK/NACK information cannot be fed back in time, which leads to poor real-time performance and high service delay. By dynamically adjusting the size of the pre-scheduling switch and the pre-scheduled traffic, the base station device can ensure that the terminal devices of different priorities have persistent PUSCH scheduling in real time, so that the terminal device can be on the PUSCH channel without violating the protocol standard. Timely feedback of ACK/NACK information to meet business requirements such as web browsing, video telephony, instant messaging, etc. for low latency. The technical solution provided by the embodiment of the present application does not involve the tampering of the air interface private interface message, and the setting of the pre-scheduling switch is simple to implement, and the DSP processing does not constitute a load, and the demodulation and translation of the base station device and the terminal device are performed. The code performance has no effect. The scheme has small processing capacity, low complexity and simple implementation.

Embodiment 3

Based on the same inventive concept as the above method, the embodiment of the present application further provides a base station device. As shown in FIG. 3, the base station device includes:

The obtaining module 11 is configured to obtain a service type corresponding to the terminal device;

The sending module 12 is configured to send scheduling information for the uplink subframe to the terminal device when the service type corresponding to the terminal device is the specified service type;

The sending module 12 is specifically configured to: after learning that the service type corresponding to the terminal device is a specified service type, enable a pre-scheduling switch for the terminal device, and after the pre-scheduling switch is turned on, The scheduling information for the uplink subframe is sent to the terminal device.

In the embodiment of the present application, the base station device further includes: a setting module 13 configured to set a pre-scheduled traffic volume for the terminal device according to a priority corresponding to the terminal device; a higher priority of the terminal device The greater the amount of pre-scheduling traffic;

When the sending module 12 sends the scheduling information for the uplink subframe to the terminal device, the scheduling information carries the set pre-scheduled traffic volume;

After receiving the scheduling information for the uplink subframe, the terminal device sends the ACK/NACK information to the base station device by using the set pre-scheduling traffic.

The setting module 13 is specifically configured to: after learning that the service type corresponding to the terminal device is the specified service type, enable the pre-scheduling switch for the terminal device, and after the pre-scheduling switch is turned on, in the embodiment of the present application, The specified service type is specifically: A service type that requires a delay less than a preset threshold.

The modules of the device of the present application may be integrated into one or may be deployed separately. The above modules can be combined into one module, or they can be further split into multiple sub-modules.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present application can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is a better implementation. the way. Based on such understanding, the technical solution of the present application, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium, including a plurality of instructions for causing a A computer device (which may be a personal computer, server, or network device, etc.) performs the methods described in various embodiments of the present application.

A person skilled in the art can understand that the drawings are only a schematic diagram of a preferred embodiment, and the modules or processes in the drawings are not necessarily required to implement the application.

Those skilled in the art can understand that the modules in the apparatus in the embodiment can be described in accordance with the embodiments. In the apparatus distributed in the embodiment, the corresponding change may also be made in one or more apparatuses different from the embodiment. The modules of the above embodiments may be combined into one module, or may be further split into multiple sub-modules.

The serial numbers of the embodiments of the present application are merely for the description, and do not represent the advantages and disadvantages of the embodiments.

The above disclosure is only a few specific embodiments of the present application, but the present application is not limited thereto, and any changes that can be made by those skilled in the art should fall within the protection scope of the present application.

Claims

Claim

A method for transmitting a positive acknowledgement ACK/negative acknowledgement NACK information, characterized in that the method comprises:

The method according to claim 1, wherein the base station device sends scheduling information for the uplink subframe to the terminal device, including:

After the base station device learns that the service type corresponding to the terminal device is the specified service type, the base station device starts a pre-scheduling switch for the terminal device, and after the pre-scheduling switch is enabled, the base station device sends the uplink device to the terminal device. Scheduling information for subframes.

The method according to claim 1, wherein the method further includes: a traffic volume; wherein, the higher the priority corresponding to the terminal device, the larger the pre-scheduling traffic; When the device sends the scheduling information for the uplink subframe to the terminal device, the scheduling information carries the preset pre-scheduled traffic volume;

The method according to claim 3, wherein the base station device sets a pre-scheduled traffic volume for the terminal device according to a priority corresponding to the terminal device, including:

After the base station device learns that the service type corresponding to the terminal device is the specified service type, the pre-scheduling switch is enabled for the terminal device, and after the pre-scheduling switch is enabled, the priority corresponding to the terminal device is The terminal device sets the pre-scheduled traffic.

The method according to claim 1, wherein the specified service type is specifically: A service type that requires a delay less than a preset threshold.

A base station device, comprising:

7. The base station device according to claim 6, wherein

The sending module is configured to: after the service type corresponding to the terminal device is the specified service type, enable a pre-scheduling switch for the terminal device, and send the uplink device to the terminal device after the pre-scheduling switch is enabled. Scheduling information for subframes.

The base station device according to claim 6, further comprising: a pre-scheduled traffic volume; the higher the priority corresponding to the terminal device, the larger the pre-scheduled traffic volume; When the terminal device sends the scheduling information for the uplink subframe, the scheduling information carries the set pre-scheduling traffic;

9. The base station device according to claim 8, wherein

The setting module is specifically configured to: after learning that the service type corresponding to the terminal device is a specified service type, enable a pre-scheduling switch for the terminal device, and after the pre-scheduling switch is turned on,

The base station device according to claim 6, wherein the specified service type is: a service type requiring a delay less than a preset threshold.