CN106817205B - Dedicated physical data channel data scheduling method and device - Google Patents

Abstract

The invention provides a dedicated physical data channel data scheduling method and device, belonging to the field of communications. The dedicated physical data channel data scheduling method includes: step 1: obtaining the TFCI of the user that needs to be demodulated; step 2: selecting a corresponding time delay for each data frame in the TTI, and delivering the demodulation at the time corresponding to one of the time delays Tn Step 3: After collecting the demodulated data of all data frames in the TTI, perform decoding; Step 4: Obtain the decoding result, if the decoding is correct, judge that the scheduling interference is eliminated; if the decoding is wrong, put it into the waiting Demodulation scheduling list; Step 5: If the scheduling list to be demodulated is not empty, check the remaining demodulation resources, if the remaining demodulation resources are sufficient, go to Step 6; Step 6: Check the demodulation delay of each data frame in the TTI, Step 2 is performed when the demodulation delay of at least one frame of data satisfies the preset condition. The technical scheme of the present invention can reduce the processing time delay as much as possible while ensuring the interference cancellation gain.

Description

Dedicated physical data channel data scheduling method and device

technical field

The present invention relates to the field of communications, and in particular, to a method and device for scheduling data on a dedicated physical data channel.

Background technique

The demodulation of the uplink DPDCH (Dedicated Physical Data Channel, dedicated physical data channel) is to demodulate immediately after the information of the control channel is decoded. When the interference cancellation function is introduced into the system, the demodulation of the uplink DPDCH is to fully enjoy the gain of interference cancellation. , Fixed use of EDPDCH (Enhanced Dedicated Physical Data Channel, Enhanced Dedicated Physical Data Channel) channel interference cancellation after the end of the data demodulation, demodulate one frame of data each time, compared with the time when the interference cancellation function is not introduced, more than one frame is added. The delay increases the entire loopback delay, which affects the ping packets and the experience of some rate users.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a dedicated physical data channel data scheduling method and device, which can reduce the processing delay as much as possible while ensuring the interference cancellation gain.

In order to solve the above-mentioned technical problems, the embodiments of the present invention provide the following technical solutions:

In one aspect, a DPDCH data scheduling method is provided, including:

Step 1: Obtain the transport format combination identifier TFCI of the user to be demodulated;

Step 2: Select the corresponding time delay for each data frame in the transmission time interval TTI, and issue a demodulation task at the moment corresponding to one of the time delays Tn, where n=1, 2, 3... The delays are independent of each other;

Step 3: After collecting the demodulated data of all data frames in the TTI, perform decoding;

Step 4: Obtain the decoding result, if the decoding is correct, judge that the scheduling interference is eliminated; if the decoding is wrong, put it into the scheduling list to be demodulated;

Step 5: If the scheduling list to be demodulated is not empty, check the remaining demodulation resources, if the remaining demodulation resources are sufficient, go to step 6;

Step 6: Check the demodulation delay of each data frame in the TTI, and go to step 2 when at least one frame of data demodulation delay meets the preset condition.

Further, the time delay Tn in the step 2 is selected from the following moments:

The T1 time when the TFCI information is obtained;

Time T2 when the first demodulation and interference cancellation of the high-speed uplink packet access HSUPA 10msTTI user ends;

Time T3 when the interference cancellation of other DPDCH channels ends;

Time T4 when the secondary demodulation interference cancellation of HSUPA 10msTTI users ends;

Time T5 when the HSUPA 2ms user re-interference cancellation ends.

Further, at the time of the first demodulation Tn=Ti+data frame frame length, i=1, 2, 3, 4, and 5.

Further, the time Tn of the first demodulation is the minimum value among Ti+data frame length and antenna data storage length, i=1, 2, 3, 4, and 5.

Further, when the antenna data storage length is less than the TTI length, the length of one subframe is reserved as the processing time to demodulate all the data frames in the TTI from which the TFCI has been demodulated, and store the demodulated data.

Further, the step 3 also includes:

Buffer the demodulated data, and decode the demodulated data of a complete TTI.

Further, the step 3 includes:

When there is only one TTI, if the antenna data storage length is greater than the preset value, demodulate and decode all data frames in the TTI; or

When there are more than two TTIs, decoding the latest demodulated data for each data frame in the TTI; or

When there are two or more TTIs, after the data frame corresponding to the smaller TTI is correctly decoded, the demodulated data of the data frame corresponding to the smaller TTI is used when decoding other TTIs; or

When there are two or more TTIs, before the end of each TTI, demodulate all the data frames contained in the TTI.

Further, the step 6 includes:

Determine whether the demodulation delay of each data frame in the TTI is greater than the antenna data storage length, and if the demodulation delay is greater than the antenna data storage length, the next demodulation is not performed.

Further, the step 6 also includes:

When the TTI is greater than 10ms, only the next demodulation is performed on the data of the second frame.

The embodiment of the present invention also provides a DPDCH data scheduling device, including:

an acquisition module, used to acquire the transport format combination identifier TFCI of the user to be demodulated;

The delay selection module is used to select the corresponding delay for each data frame in the transmission time interval TTI, and issue a demodulation task at the moment corresponding to one of the delays Tn, where n=1, 2, 3... , the delays of different frames are independent of each other;

The demodulation module is used to demodulate all the data frames in the TTI.

The decoding module is used for decoding after collecting the demodulated data of all the data frames in the TTI;

Interference cancellation module, used to eliminate scheduling interference when decoding is correct;

The antenna data storage module is used to store the demodulated data in the to-be-demodulated scheduling list when the decoding is wrong;

A demodulation resource updating module, used for checking the remaining demodulation resources when the scheduling list to be demodulated is not empty;

The demodulation data frame selection module is used to check the demodulation delay of each data frame in the TTI, and determine whether there is at least one frame of data demodulation delay that meets the preset condition.

Embodiments of the present invention have the following beneficial effects:

In the above solution, it is considered to change the demodulation scheduling strategy of the DPDCH when the interference cancellation is turned on, so as to reduce the processing delay as much as possible while ensuring the interference cancellation gain.

Description of drawings

1 is a flowchart of a method for scheduling dedicated physical data channel data according to an embodiment of the present invention;

2 is a structural block diagram of a dedicated physical data channel data scheduling apparatus according to an embodiment of the present invention;

3 is a schematic diagram of a specific scheduling method under the condition of two TTI configurations and sufficient demodulation resources according to an embodiment of the present invention;

4 is a schematic diagram of a specific scheduling method under the condition of two TTI configurations and limited demodulation resources according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a specific scheduling method under two TTI configurations according to an embodiment of the present invention.

Detailed ways

In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention clearer, the following detailed description will be given in conjunction with the accompanying drawings and specific embodiments.

Embodiments of the present invention provide a dedicated physical data channel data scheduling method and device, which can reduce processing delay as much as possible while ensuring interference cancellation gain.

Example 1

This embodiment provides a DPDCH data scheduling method. As shown in FIG. 1 , this embodiment includes:

Step 1: Obtain the transport format combination identifier TFCI of the user to be demodulated;

Step 2: Select a corresponding time delay for each data frame in the TTI (Transmission Time Interval, transmission time interval), and issue a demodulation task at the moment corresponding to one of the time delays Tn, where n=1, 2, 3 ..., the delays of different frames are independent of each other;

Step 3: After collecting the demodulated data of all data frames in the TTI, perform decoding;

Step 4: Obtain the decoding result, if the decoding is correct, judge that the scheduling interference is eliminated; if the decoding is wrong, put it into the scheduling list to be demodulated;

Step 5: If the scheduling list to be demodulated is not empty, check the remaining demodulation resources, if the remaining demodulation resources are sufficient, go to step 6;

Step 6: Check the demodulation delay of each data frame in the TTI, and go to step 2 when at least one frame of data demodulation delay meets the preset condition.

The technical solution of this embodiment considers changing the demodulation scheduling strategy of the DPDCH when the interference cancellation is turned on, so as to reduce the processing delay as much as possible while ensuring the interference cancellation gain.

Further, the time delay Tn in the step 2 is selected from the following moments:

The T1 time when the TFCI (Transport Format Combination Indicator) information is obtained;

HSUPA (high speed uplink packet access, high-speed uplink packet access) 10msTTI user time T2 when the interference cancellation ends once demodulated;

Time T3 when the interference cancellation of other DPDCH channels ends;

Time T4 when the secondary demodulation interference cancellation of HSUPA 10msTTI users ends;

Time T5 when the HSUPA 2ms user re-interference cancellation ends.

The selection principle of demodulation time is to prepare all the information required for demodulation, so that the interference cancellation gain can be obtained. According to the current interference cancellation system, the above time points are selected for demodulation, and the above time points can be increased or decreased according to the different interference cancellation schedules. At the same time, for the same user, according to the resource usage, the user type in the current system, etc., traverse the above time points for demodulation, or select a part of the time points for demodulation.

Further, at the time of the first demodulation Tn=Ti+data frame frame length, i=1, 2, 3, 4, and 5.

According to the TTI configuration of the DPDCH, the time of the first demodulation is selected, which is on the boundary of the minimum TTI, so the selected time may be (Tn=Ti+data frame frame length).

Further, the time selection of the first demodulation is also limited by the storage length of the antenna data, and the time Tn of the first demodulation is the minimum value among Ti+data frame length and antenna data storage length, i=1,2 ,3,4,5.

Further, when the antenna data storage length is less than the TTI length, the length of one subframe is reserved as the processing time to demodulate all the data frames in the TTI from which the TFCI has been demodulated, and store the demodulated data.

Further, the step 3 also includes:

Cache the demodulated data, store the latest demodulated data in each frame, and the secondary demodulated data covers the demodulated data once. When decoding, it can be the demodulated data of the first frame and the demodulated data of the second frame. The data, which constitutes a complete TTI data, is sent to the decoder for decoding.

Further, the step 3 includes:

When there is only one TTI, if the antenna data storage length is greater than the preset value, demodulate and decode all data frames in the TTI; or

When there are more than two TTIs, decoding the latest demodulated data for each data frame in the TTI; or

When there are two or more TTIs, after the data frame corresponding to the smaller TTI is correctly decoded, the demodulated data of the data frame corresponding to the smaller TTI is used when decoding other TTIs; or

When there are two or more TTIs, before the end of each TTI, demodulate all the data frames contained in the TTI.

To sum up, in the specific embodiment, in the case of configuring a TTI, after the decoding result comes out, it is judged whether it is necessary to demodulate again, and when the length of the antenna data is sufficient, all frames in the TTI are demodulated each time; For the case where multiple TTIs are configured, each TTI decoding result needs to be judged whether to demodulate again, and the latest demodulation data of each frame in the TTI is used for decoding; for the case where multiple TTIs are configured, the resource Restricted, for the data frame included after the correct decoding of the small TTI, no re-demodulation is performed, and it is directly used for decoding the long TTI; for the case where multiple TTIs are configured, the resources are not limited, and before the end of each TTI , demodulates all data frames contained in the TTI.

Further, the step 6 includes:

Determine whether the demodulation delay of each data frame in the TTI is greater than the antenna data storage length. If the demodulation delay is greater than the antenna data storage length, the next demodulation will not be performed, otherwise the next demodulation will be performed normally.

Further, the step 6 also includes:

When the TTI is greater than 10ms, due to the different demodulation delays of multiple frames in the TTI, the received interference cancellation gains are also different, and the first frame receives a larger gain. The second frame undergoes the next demodulation.

Embodiment 2

This embodiment provides a DPDCH data scheduling apparatus. As shown in FIG. 2 , this embodiment includes:

an acquisition module, used to acquire the transport format combination identifier TFCI of the user to be demodulated;

The delay selection module is used to select the corresponding delay for each data frame in the transmission time interval TTI, and issue a demodulation task at the moment corresponding to one of the delays Tn, where n=1, 2, 3... , the delays of different frames are independent of each other;

The demodulation module is used to demodulate all the data frames in the TTI.

The decoding module is used for decoding after collecting the demodulated data of all the data frames in the TTI;

Interference cancellation module, used to eliminate scheduling interference when decoding is correct;

The antenna data storage module is used to store the demodulated data in the to-be-demodulated scheduling list when the decoding is wrong;

A demodulation resource updating module, used for checking the remaining demodulation resources when the scheduling list to be demodulated is not empty;

The demodulation data frame selection module is used to check the demodulation delay of each data frame in the TTI, and determine whether there is at least one frame of data demodulation delay that meets the preset condition.

The technical solution of the present embodiment considers changing the demodulation scheduling strategy of the DPDCH when the interference cancellation is turned on, so as to reduce the processing delay as much as possible while ensuring the interference cancellation gain.

Embodiment 3

This embodiment provides a DPDCH configured with two TTIs. The two TTIs are DPDCH with 10msTTI and 20msTTI respectively. When demodulation resources are sufficient, the specific scheduling method in this embodiment is shown in FIG. 3 :

For 10msTTI, the decoding is performed directly after the demodulation, and the frame 0 is always decoded incorrectly, and demodulation decoding is performed until 5 time points; if one of the decoding is correct, the subsequent demodulation decoding is not performed, such as Figure 3 shows frames 2,3,4,5.

For 20msTTI, frame n, n+1 form a complete TTI;

The decoding time of the TTI composed of frames 0 and 1 is as follows:

The first decoding time: when the demodulation of frame 1 is completed, it is sent to the decoder together with the last demodulation data of frame 0, that is, the first demodulation result of frame 1, and the fourth time of frame 0. The demodulation and modulation are sent to the decoder together for decoding.

Second decoding time: the fourth demodulation of frame 0 and the second demodulation of frame 1;

The third decoding time: the fifth demodulation of frame 0 and the second demodulation of frame 1;

The fourth decoding time: the fifth demodulation of frame 0 and the third demodulation of frame 1;

The fifth decoding time: the fifth demodulation of frame 0 and the fourth demodulation of frame 1;

The sixth decoding time: the fifth demodulation of frame 0 and the fifth demodulation of frame 1;

As long as the decoding is correct once at the above time points, subsequent decoding does not need to be performed.

When the demodulation resources are limited, as shown in FIG. 4 , a part of the time is selected for demodulation scheduling.

For example, for frame 0, demodulation is only performed at T1, T3, and T5, and other frames can also be selectively scheduled and demodulated according to the decoding situation and demodulation resources.

Embodiment 4

The present embodiment provides a DPDCH that stores 4 frames of antenna data and configures two TTIs, and the two TTIs are respectively 20msTTI and 40msTTI. As shown in Figure 5, the specific scheduling method of the present embodiment includes the following steps:

Step 1: Obtain the TFCI of 20msTTI at the end of frame 1, as shown in Figure 5, send frame 0, 1 demodulation, where the delay of frame 0 is (T1 + data frame frame length>=T4), the delay of frame 1 is T1;

Step 2: Demodulate frame 1 twice at time T2. At this time, the delay of frame 0 is T2+data frame frame length. Since T4<(T2+data frame frame length)<T5 does not benefit from demodulation in this interval, it is not Carry out the demodulation of frame 0, and send the secondary demodulation result of frame 1 and the primary demodulation result of frame 0 into the decoder for decoding;

Step 3: demodulate frame 1 twice at the time of T3. At this time, the delay of frame 0 is T3 + data frame frame length. Since T5=<(T3 + data frame frame length), frame 0 and frame 1 are demodulated at the same time. and decode;

Step 4: Obtain the TFCI of frames 2 and 3, that is, the end of the 40ms TTI, and deliver the demodulation of frames 2 and 3;

Step 5: The second demodulation result of frame 0, the third demodulation result of frame 1 and the first demodulation result of frame 2 and 3 are sent to the decoder for decoding;

Step 6: 40ms TTI decoding error, because the delay of frame 0 has exceeded the storage length of the antenna data at this time, therefore, frame 1 is scheduled for three demodulation, frame 2, frame 3 is scheduled for second demodulation, and the second demodulation of frame 0 is scheduled. The demodulation result, three times of demodulation of frame 1 and three times of demodulation of frame 2 and 3 are sent to the decoder for decoding, the decoding is correct, and the scheduling is over.

Many of the functional components described in this specification are referred to as modules in order to more particularly emphasize the independence of their implementation.

In this embodiment of the present invention, the modules may be implemented in software so as to be executed by various types of processors. For example, an identified executable code module may comprise one or more physical or logical blocks of computer instructions, which may be structured as objects, procedures, or functions, for example. Nonetheless, the executable code of the identified modules need not be physically located together, but may include distinct instructions stored in distinct entities that, when logically combined, constitute the module and achieve the module's stated purpose .

In practice, an executable code module may be a single instruction or many instructions, and may even be distributed over multiple different code segments, among different programs, and across multiple memory devices. Likewise, operational data may be identified within modules, and may be implemented in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may be distributed over different locations (including over different storage devices), and may exist at least in part only as electronic signals on a system or network.

When a module can be implemented by software, considering the level of existing hardware technology, a module that can be implemented by software, regardless of cost, can build corresponding hardware circuits to implement corresponding functions. The hardware circuits include conventional very large scale integration (VLSI) circuits or gate arrays as well as off-the-shelf semiconductors such as logic chips, transistors, or other discrete components. A module may also be implemented in programmable hardware devices, such as field programmable gate arrays, programmable array logic, programmable logic devices, and the like.

In the method embodiments of the present invention, the sequence numbers of the steps cannot be used to define the sequence of the steps. For those of ordinary skill in the art, the sequence of the steps can be changed without creative work. It also falls within the protection scope of the present invention.

The above are the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. It should be regarded as the protection scope of the present invention.

Claims (11)

1. A method for scheduling DPDCH data in a Dedicated Physical Data Channel (DPDCH), comprising:

step 1: acquiring a transport format combination identifier TFCI of a user needing to be demodulated;

step 2: selecting corresponding time delay for each data frame in a transmission time interval TTI, and issuing a demodulation task at a time corresponding to one time delay Tn, wherein n is 1,2,3 … …, and the time delays of different frames are independent;

and step 3: after the demodulated data of all data frames in the TTI are collected, decoding is carried out, wherein when only one TTI exists, if the antenna data storage length is larger than a preset value, all data frames in the TTI are decoded after being demodulated;

and 4, step 4: obtaining a decoding result, and judging that scheduling interference is eliminated if the decoding is correct; if the decoding is wrong, putting the scheduling list to be demodulated into the scheduling list;

and 5: if the scheduling list to be demodulated is not empty, checking the residual demodulation resources, and if the residual demodulation resources are sufficient, turning to the step 6;

step 6: and (3) checking the demodulation time delay of each data frame in the TTI, and turning to the step 2 when the demodulation time delay of at least one frame of data meets a preset condition.

2. The DPDCH data scheduling method of claim 1, wherein the time delay Tn in step 2 is selected from the following time instants:

acquiring the T1 moment of the TFCI information;

t2 moment when the high speed uplink packet access HSUPA 10ms TTI user once demodulates interference cancellation;

t3 moment when DPDCH channel interference cancellation of other users ends;

t4 moment when the secondary demodulation interference cancellation of the HSUPA 10msTTI user is finished;

the HSUPA 2ms user resolvers the T5 time at which the interference cancellation ends.

3. The DPDCH data scheduling method of claim 2, wherein the time Tn of the first demodulation is Ti + the frame length of the data frame, i is 1,2,3,4, 5.

4. The DPDCH data scheduling method of claim 2, wherein the time Tn of the first demodulation is the minimum of the frame length of Ti + data frame and the antenna data storage length, i is 1,2,3,4, 5.

5. The DPDCH data scheduling method of claim 4, wherein when the antenna data storage length is less than the TTI length, the length of one subframe is reserved as the processing time, all data frames in the TTI where the TFCI has been demodulated are demodulated, and the demodulated data are stored.

6. The DPDCH data scheduling method of claim 1, wherein the step 3 further includes:

and buffering the demodulated data, and decoding the demodulated data of one complete TTI.

7. The DPDCH data scheduling method of claim 1, wherein the step 3 further includes:

when more than two TTIs exist, decoding the latest demodulation data of each data frame in the TTIs; or

When more than two TTIs exist, after the data frame corresponding to the smaller TTI is decoded correctly, the demodulation data of the data frame corresponding to the smaller TTI is used when other TTIs are decoded; or

When there are more than two TTIs, all data frames contained in the TTI are demodulated before the end of each TTI.

8. The DPDCH data scheduling method of claim 1, wherein the step 6 includes:

and judging whether the demodulation time delay of each data frame in the TTI is greater than the antenna data storage length, and if the demodulation time delay is greater than the antenna data storage length, not performing next demodulation.

9. The DPDCH data scheduling method of claim 1, wherein the step 6 further includes:

when the TTI is greater than 10ms, only the second frame data is demodulated next time.

10. A Dedicated Physical Data Channel (DPDCH) data scheduling apparatus, comprising:

an obtaining module, configured to obtain a transport format combination identifier TFCI of a user to be demodulated;

the time delay selection module is used for selecting corresponding time delay for each data frame in a transmission time interval TTI, and issuing a demodulation task at a time corresponding to one time delay Tn, wherein n is 1,2,3 … …, and the time delays of different frames are independent;

the demodulation module is used for demodulating all data frames in the TTI;

the decoding module is used for decoding after the demodulated data of all the data frames in the TTI is collected, wherein when only one TTI exists, if the antenna data storage length is larger than a preset value, all the data frames in the TTI are decoded after being demodulated;

the interference elimination module is used for eliminating scheduling interference when the decoding is correct;

the antenna data storage module is used for storing the demodulation data in a scheduling list to be demodulated when the decoding is wrong;

the demodulation resource updating module is used for checking the residual demodulation resources when the scheduling list to be demodulated is not empty;

and the demodulation data frame selection module is used for checking the demodulation time delay of each data frame in the TTI and judging whether at least one frame of data demodulation time delay meets the preset condition.

11. The DPDCH data scheduling apparatus of claim 10, wherein the decoding after the collection of the demodulated data of all data frames in the TTI further comprises:

when more than two TTIs exist, decoding the latest demodulation data of each data frame in the TTIs; or

When more than two TTIs exist, after the data frame corresponding to the smaller TTI is decoded correctly, the demodulation data of the data frame corresponding to the smaller TTI is used when other TTIs are decoded; or

When there are more than two TTIs, all data frames contained in the TTI are demodulated before the end of each TTI.

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