WO2016131306A1

WO2016131306A1 - Content distribution method and device

Info

Publication number: WO2016131306A1
Application number: PCT/CN2015/093804
Authority: WO
Inventors: 谢玉堂; 石玉; 侯蓉晖; 吕永
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-07-10
Filing date: 2015-11-04
Publication date: 2016-08-25
Also published as: CN106341892A

Abstract

Provided are a content distribution method and device. The method comprises: respectively establishing device to device (D2D) connections between a request device and two or more sharing devices; dividing, by the request device and according to a preset block policy, requested content into blocks respectively corresponding to each of the sharing devices, respectively notifying, by the request device, each of the sharing devices; and respectively transmitting, by the each of the sharing devices and to the request device, a respectively corresponding block notified by the request device.

Description

Method and device for realizing content distribution

Technical field

This document relates to, but is not limited to, 3rd Generation Partnership Project (3GPP) technology, and more particularly to a method, device and computer readable storage medium for realizing content distribution in direct communication between devices.

Background technique

In order to reduce the burden on the mobile communication network caused by the rapid increase of data traffic between devices such as mobile terminals, the 3GPP protocol introduces a communication mode between devices (D2D, Device to Device). Direct communication between devices means that the adjacent devices only perform signaling interaction through the base station, and the data transmission between the devices does not need to be relayed by the base station to directly transmit between the devices. It is not difficult to see that the distribution of content such as video distribution through direct communication between devices reduces the burden on the base station and improves the processing capability of the mobile network for data communication.

The 3GPP protocol specifies point-to-point D2D communication and point-to-multipoint D2D communication, respectively. Point-to-point D2D communication means that a requesting device obtains the requested content from a sharing device. Point-to-multipoint D2D communication means that two or more requesting devices obtain the same requested content from the same sharing device. The requesting device is a device that requests to obtain the requested content, and the sharing device is a device that is willing to share the requested content.

In the scenario of the point-to-point D2D, the requesting device mainly establishes a point-to-point D2D connection (hereinafter referred to as an established point-to-point D2D connection) by the ProSe (Proximity-based Services) server and the sharing device, and requests the device. Compute communication resources for the established connection and request the ProSe server to allocate communication resources for the established connection, and the sharing device sends the requested content to the requesting device. The ProSe server is a server for serving D2D, and is disposed on the network side.

The above processes for establishing a D2D connection mainly include: device discovery and connection establishment. In the process of device discovery, the 3GPP protocol supports the requesting device to request additional information while requesting to discover the sharing device.

The foregoing process for allocating communication resources generally includes: requesting the device to calculate the transmission rate of the established connection, obtaining the channel state information (CSI, Channel State Information) of the established connection through the ProSe server, and determining according to the calculated transmission rate and the requested CSI. The connected communication resource is established, and the ProSe server is requested to allocate the calculated communication resource for the established connection; after receiving the above request, the ProSe server allocates communication resources for the requesting device and the sharing device. Wherein determining the communication resource comprises: determining a channel rate according to the CSI, and setting the communication resource to a ratio of the calculated transmission rate to the determined channel rate. Here, the channel rate is in units of bit/s/Hz, that is, bits per second per Hz, and the transmission rate is in units of bit/s, that is, bits per second; determining the channel rate according to CSI includes: according to CSI and preset CSI and modulation The channel rate is determined by the correspondence between the mode and the channel rate; the transmission rate is the ratio of the amount of data of the requested content to the transmission time.

It should be noted that the 3GPP protocol supports that, when the CSI is acquired in the allocated communication resource, the requesting device acquires other information of the shared device, such as the moving speed, the moving direction, and the location information of the sharing device, through the ProSe server. After the ProSe server allocates communication resources, it enters the above process of sending the request content.

In the existing point-to-point D2D communication, since the sharing device needs to transmit the complete request content to the requesting device, the load of the sharing device is increased correspondingly, especially when the amount of data of the requested content is large, and the preset transmission time is small, sharing The load of the device increases greatly, so the processing performance of the sharing device is greatly reduced, thereby correspondingly reducing the user experience of the sharing device.

Summary of the invention

The following is a summary of the subject matter described in detail herein, and is not intended to limit the scope of the claims.

In order to solve the above technical problem, the embodiment of the present invention provides a method and a device for implementing content distribution, which can reduce the load of the sharing device and better ensure the processing performance of the sharing device.

An embodiment of the present invention discloses a method for implementing content distribution, including:

The requesting device establishes a direct communication D2D connection between the peer-to-peer devices and two or more sharing devices respectively;

The requesting device divides the request content into one sharing device with each of the sharing devices according to a preset blocking policy. a corresponding block, and separately notify each of the sharing devices;

Each of the sharing devices respectively transmits the notified segment to the requesting device.

After the point-to-point D2D connection is established respectively, before the content is divided into blocks, the method further includes:

The requesting device separately acquires channel state information CSI of each established connection by using a proximity service ProSe server;

After the separately reporting, before the separately transmitting, the method further includes:

The requesting device calculates a transmission rate of each of the established connections, determines a communication resource for each of the established connections according to a transmission rate and a CSI corresponding to each of the established connections, and requests the ProSe server to respectively Each of the established connections allocates a corresponding determined communication resource.

Optionally, the number of the sharing devices is N; the blocking policy is: dividing the requested content into N partitions, and establishing a correspondence between each divided partition and each of the sharing devices;

The transmission rate of each of the established connections is the ratio of the data amount of the corresponding block to the preset transmission time.

Optionally, the step of establishing a device in the point-to-point D2D connection further includes: the requesting device requesting, by the requesting device, the standby time corresponding to the remaining power of the sharing device;

The blocking policy is: for each sharing device, setting a standby time of the sharing device and a time with a smaller value in the preset transmission time as the first sending time of the sharing device, and obtaining the information of each of the sharing devices. a first sending time, dividing the request content into blocks corresponding to each of the sharing devices according to the obtained ratio of each of the first sending times;

The transmission rate of each of the established connections is a ratio of the data amount of the corresponding block to the corresponding first transmission time.

Optionally, when the requesting device obtains the CSI of each of the established connections by using the ProSe server, the method further includes: the requesting device separately acquiring the moving direction and the motion of each of the sharing devices by using the ProSe server. Speed and position information;

The blocking policy is: for each sharing device, according to the sports party corresponding to the sharing device Calculating a second sending time, setting a second sending time of the sharing device and a time when the value of the pre-set transmission time is smaller as the third sending time of the sharing device, and obtaining each of the Sharing the third sending time of the device, and dividing the request content into the blocks corresponding to each of the sharing devices according to the obtained ratio of each third sending time;

The transmission rate of each of the established connections is a ratio of the data amount of the corresponding block to the corresponding third transmission time.

The calculating the second sending time includes: calculating, for each sharing device, how long the distance between the requesting device and the sharing device is equal to a preset maximum according to the moving direction, the moving speed, and the location information of the requesting device and the sharing device The communication distance, the calculated time is the second transmission time corresponding to the sharing device.

Each of the sharing devices includes: a start and stop location identifier of each of the divided blocks to be separately sent to the sharing device corresponding to each of the segments by the ProSe server.

The embodiment of the invention further discloses an apparatus for realizing content distribution, comprising at least a connection establishing unit 10, a blocking unit 20 and a receiving unit 30, wherein

The connection establishing unit 10 is configured to establish a point-to-point D2D connection with two or more sharing devices respectively;

The blocking unit 20 is configured to divide the request content into blocks corresponding to each sharing device according to a pre-set blocking policy, and respectively notify each of the sharing devices;

The receiving unit 30 is configured to respectively receive the sub-blocks sent by each sharing device.

The blocking unit 20 is further configured to:

Obtaining, by the ProSe server, the CSIs of each of the established connections respectively;

Calculating a transmission rate of each of the established connections, determining communication resources for each of the established connections according to a transmission rate and a CSI corresponding to each of the established connections, and requesting the ProSe server to be each of the The established connection allocates the corresponding determined communication resources.

Optionally, the number of the sharing device is N; the blocking policy is: dividing the requested content into N partitions, and establishing a correspondence between each divided partition and the sharing device;

Optionally, the connection establishing unit 10 is further configured to: when requesting to discover the sharing device, request a standby time of the sharing device corresponding to the remaining power;

The blocking policy is: for each sharing device, setting a standby time of the sharing device and a time with a smaller value in the preset transmission time as the first sending time of the sharing device, and obtaining the number of each of the sharing devices. a sending time, dividing the request content into blocks corresponding to each of the sharing devices according to the obtained ratio of each of the first sending times;

Optionally, when the CSI of each of the established connections is obtained by the ProSe server, the blocking unit 20 is further configured to: separately acquire, by using the ProSe server, a motion direction, a motion speed, and location information;

The blocking policy is: for each sharing device, calculating a second sending time according to the moving direction, the moving speed, and the position information corresponding to the sharing device, and the second sending time of the sharing device and the preset transmission time value The smaller time is set as the third sending time of the sharing device, and the third sending time of each of the sharing devices is obtained, and the request content is divided into each of the sharing devices according to the obtained ratio of each third sending time. Corresponding block;

When the calculating the second sending time, the blocking unit 20 is configured to calculate, according to the moving direction, the moving speed, and the position information of the device and the sharing device, how long the device is processed for each sharing device. The distance between the sharing device and the sharing device is equal to the preset maximum communication distance, and the calculated time is the second sending time corresponding to the sharing device.

When the device is notified of the sharing device, the blocking unit 20 is configured to: send and receive the start and stop location identifiers of each of the divided blocks to the sharing devices corresponding to each of the segments by using the ProSe server.

The embodiment of the present invention further provides a computer readable storage medium, which stores program instructions, and when the program instructions are executed by the processor, can implement a method for implementing content distribution provided by the embodiments of the present invention.

Compared with the prior art, the technical solution of the present invention includes: the requesting device separately establishes a point-to-point D2D connection with two or more sharing devices; and the requesting device divides the request content into each sharing device according to a preset blocking policy. A corresponding partition is respectively notified to each sharing device; each sharing device separately transmits the notified segment to the requesting device. According to the technical solution of the present invention, a plurality of sharing devices respectively send a part of the requested content to the same requesting device, that is, a block that is notified to be transmitted, and the load of the sharing device is reduced compared to the existing point-to-point D2D communication. The processing performance of the sharing device is well ensured, so that the user experience of sharing the setting is better ensured.

Other features and advantages of the invention will be set forth in the description which follows, The objectives and other advantages of the invention may be realized and obtained by means of the structure particularly pointed in the appended claims.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

The drawings are used to provide a further understanding of the technical solutions of the present invention, and constitute a part of the specification, which together with the embodiments of the present application are used to explain the technical solutions of the present invention, and do not constitute a limitation of the technical solutions of the present invention.

1 is a flowchart of a method for implementing content distribution in an embodiment of the present invention;

2 is a schematic diagram of a positional relationship between a requesting device and a sharing device according to a third embodiment of the present invention;

Figure 3 is a flow chart of the first embodiment of the present invention;

Figure 4 is a flow chart of a second embodiment of the present invention;

Figure 5 is a flow chart of a third embodiment of the present invention;

Figure 6 is a flow chart of a fourth embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a device for implementing content distribution according to an embodiment of the present invention.

Preferred embodiment of the invention

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that In the case of no conflict, the embodiments in the present application and the features in the embodiments may be arbitrarily combined with each other.

The steps illustrated in the flowchart of the figures may be executed in a computer system such as a set of computer executable instructions. Also, although logical sequences are shown in the flowcharts, in some cases the steps shown or described may be performed in a different order than the ones described herein.

FIG. 1 is a flowchart of a method for implementing content distribution, as shown in FIG. 1, including:

Step 101: The requesting device establishes a point-to-point D2D connection with two or more sharing devices respectively. The establishment of a point-to-point D2D connection in this step is similar to the implementation of establishing a point-to-point D2D connection in an existing point-to-point D2D communication. The difference is that two or more point-to-point D2D connections are established by this step, and a point-to-point D2D is established in the existing point-to-point D2D communication. connection.

Step 102: The requesting device divides the request content into blocks corresponding to each sharing device according to a preset blocking policy, and respectively notifies each sharing device.

Optionally, after the step 101, before the step 102, the method further includes: requesting, by the ProSe server, the CSI of each established connection separately, and obtaining the CSI of each established connection may be implemented by using a conventional technical means of a person skilled in the art. It is not intended to limit the scope of protection of the present invention and will not be described herein.

In the first embodiment of the present invention, it is assumed that the number of shared devices is N, that is, the number of established connections is N, and the blocking policy is: dividing the requested content into N partitions, and establishing each divided partition. Correspondence with each shared device. The information may be divided into N partitions evenly, or may be divided into N partitions according to other strategies; the correspondence between each partition and each shared device may be a random correspondence, or may be corresponding according to other corresponding rules.

According to the existing point-to-point D2D communication, the establishment of the point-to-point D2D connection in step 101 includes: device discovery and connection establishment.

In the second embodiment of the present invention, in the device discovery in step 101, the method of the present invention further includes: requesting, by the requesting device, the standby time corresponding to the remaining power of the sharing device while requesting to discover the sharing device. The standby time is used to indicate the power supply time of the remaining power of the sharing device.

The standby time of the sharing device can be obtained by the function of "requesting the device to request additional information while requesting to discover the sharing device" supported by the 3GPP protocol.

In the second embodiment, the blocking strategy is: for each sharing device, the standby device will be shared. The time with the smaller value of the time and the preset transmission time is set as the first sending time of the sharing device, and the first sending time of each sharing device is obtained, and the content of the request is divided into proportions according to the obtained ratio of each first sending time. Each shared device corresponds to a block.

Here for example,

It is assumed that the pre-set transmission time is 10 seconds, and the data amount of the requested content is A bit, and the point-to-point D2D connection is established with the first sharing device and the second sharing device respectively by step 101, and the obtained first sharing device and the second sharing device are respectively obtained. The standby time is 5 seconds and 20 seconds respectively. The first sending time of the first sharing device and the second sharing device is 5 seconds and 10 seconds respectively, and the first sharing device and the second sharing device correspond to the block. A/3 bits and 2A/3 bits, respectively.

In the third embodiment of the present invention, when the requesting device obtains the CSI of each established connection through the ProSe server, the method further includes: requesting the device to obtain the moving direction, the moving speed, and the moving speed of each sharing device respectively through the ProSe server. location information.

In the third embodiment, the blocking policy is: for each sharing device, calculating a second sending time according to the moving direction, the moving speed, and the position information corresponding to the sharing device, and setting the second sending time of the sharing device and the preset The time when the value of the transmission time is small is set to the third transmission time of the sharing device, and the third transmission time of each sharing device is obtained, and the content of the request is divided into each sharing device according to the ratio of each of the obtained third transmission times. Corresponding block. among them,

Calculating the second sending time includes: calculating, for each sharing device, how long the distance between the requesting device and the sharing device is equal to a preset maximum communication distance according to the moving direction, the moving speed, and the location information of the requesting device and the sharing device The calculated time is the second transmission time corresponding to the sharing device. Here, the maximum communication distance is the maximum distance between the requesting device and the sharing of direct communication between the devices.

The following example shows how to calculate how long the distance between the requesting device and the sharing device is equal to the maximum communication distance:

As shown in FIG. 2, initially, the requesting device and the sharing device are located at points A1 and B1, respectively, and the moving speeds of the requesting device and the sharing device are respectively v1 and v2, and the directions of arrows at v1 and v2 respectively represent requesting devices and sharing. The moving direction of the device, the angle between the moving directions of the two is θ, the coordinates of the A1 point are (a, 0), and the coordinates of the B1 point are (b1, b2). After the time t1, the requesting device and the sharing device are requested. The devices are located at points A2 and B2 respectively. The distance between points A2 and B2 is d2, and the maximum communication distance is D.

In Fig. 2, a coordinate system in which the point O is centered to request the direction of motion of the device as the positive direction of the x-axis is established, and the coordinates of A1 and B1 can be obtained as (a+v ₁ t ₁ , 0) and ( b ₁ + v ₂ t ₁ cos θ, b ₂ + v ₂ t ₁ sin θ), d2 is calculated as shown in formula (1),

It is not difficult to understand that when d2=D, t1 is the second transmission time. Combined with formula (1), the calculation of t1 is as shown in formula (2).

Where C=v ₁ ² +v ₂ ² -2v ₁ v ₂ cosθ, E=2(b ₁ -a)(v ₂ cosθ-v ₁ )+2b ₂ v ₂ sin θ, F=(b ₁ -a) ² +b ₂ ² -D ² .

Combined with the above examples, those skilled in the art can use mathematical modeling to derive how to calculate the second transmission time in various situations, and details are not described herein again.

The step of notifying each of the sharing devices in step 102 includes: transmitting the start and stop location identifiers of each of the divided blocks to the sharing device corresponding to each of the segments by the ProSe server.

Step 103: Each sharing device separately transmits the notified segment to the requesting device. It should be noted that each sharing device can directly send the notified packet to the requesting device, that is, the notified packet is not sent to the requesting device through the ProSe server.

After the step 102, before the step 103, the method of the present invention further includes: the requesting device calculates a transmission rate of each of the established connections, and determines a communication resource for each of the established connections according to a transmission rate and a CSI corresponding to each of the established connections. And requesting the ProSe server to allocate corresponding determined communication resources for each of the established connections.

For each established connection, how to determine the communication resource according to the transmission rate and the CSI corresponding to the established connection, the implementation scheme of determining the communication resource in the existing point-to-point D2D communication may be adopted, and other solutions may be used instead. It is intended to limit the scope of the invention.

It should be noted that, in the first embodiment, the transmission rate of each established connection is corresponding. The ratio of the amount of data of the block to the preset transfer time. In the second embodiment, the transmission rate of each established connection is the ratio of the data amount of the corresponding block to the corresponding first transmission time. In the third embodiment, the transmission rate of each established connection is the ratio of the data amount of the corresponding block to the corresponding third transmission time.

Through the technical solution of the present invention, a plurality of sharing devices respectively send a part of the request content, that is, a notification block, to the same requesting device, which reduces the load of the sharing device compared to the existing point-to-point D2D communication, and better guarantees Share the processing performance of the device. For example, it is assumed that the preset transmission time is 10 seconds, and the data volume of the requested content is 1000 bits. In the existing point-to-point D2D communication, the transmission rate of the sharing device for the requested content is 100 bit/s, which is implemented by the present invention. The technical solution provided by the example, if two sharing devices send the request content to the requesting device, the amount of data that each sharing device needs to transmit is 500 bits, and therefore, the transmission rate of each sharing device is 50 bit/s, obviously, by the present invention The technical solution provided by the embodiment greatly reduces the load of the sharing device.

The technical solution adopted in the second embodiment, compared with the technical solution adopted in the first embodiment, the first transmission time of each sharing device is determined by combining the remaining power information (ie, standby time) and the transmission time, so that The calculated first sending time (that is, the time when the sharing device transmits the blocking to the requesting device) is more accurate, and the problem of communication interruption caused by the exhaustion of the shared device power (such as a battery) during the transmission process is better avoided, and the present invention is improved. Stability of the inventive solution.

Similarly, the technical solution adopted in the second embodiment is different from the technical solution adopted in the first embodiment, that is, the distance between the requesting device and the sharing device needs to be less than or equal to the maximum communication distance. Accurately calculating the third sending time, that is, the time when the sharing device transmits the blocking to the requesting device, thereby avoiding the problem of communication interruption caused by the communication distance between the sharing device and the requesting device exceeding the maximum communication distance during the transmission process, and improving The stability of the technical solution of the present invention.

The technical solution of the present invention will be described in detail below with reference to embodiments of the method of the present invention.

First embodiment

As shown in FIG. 3, the method provided by the embodiment of the present invention includes:

Step 301: The requesting device establishes a point-to-point D2D connection with two or more sharing devices.

Step 302: The requesting device sends a request for obtaining status information of each established connection to the ProSe server, where the status information includes the CSI of the established connection.

Step 303: The ProSe server acquires status information of each established connection and feeds back to the requesting device.

Step 304: The requesting device divides the requested content into blocks corresponding to each sharing device according to the blocking policy.

The blocking strategy is: dividing the content of the request into N blocks, and establishing a correspondence between each of the divided blocks and the sharing device. The information may be divided into N partitions evenly, or may be divided into N partitions according to other strategies; the correspondence between each partition and each shared device may be a random correspondence, or may be corresponding according to other corresponding rules.

Step 305: The requesting device sends the start and stop location identifiers of each of the divided blocks to the sharing device corresponding to each of the segments by the ProSe server.

Step 306: The requesting device calculates a transmission rate of each established connection, determines a communication resource for each established connection according to a transmission rate and a CSI corresponding to each established connection, and requests the ProSe server to separately establish a connection for each connection. The corresponding determined communication resources are allocated.

The transmission rate of each established connection is the ratio of the data amount of the corresponding block to the preset transmission time.

Step 307: Each sharing device separately transmits the notified segment to the requesting device.

Step 308: After receiving the block sent by each sharing device, the requesting device notifies the ProSe server to release the allocated communication resource.

Second embodiment

As shown in FIG. 4, the method provided by the embodiment of the present invention includes:

Step 401: The requesting device establishes a point-to-point D2D connection with two or more sharing devices. In the device discovery in establishing a point-to-point D2D connection, the requesting device requests the sharing device to wait for the standby time corresponding to the remaining power while requesting to discover the sharing device.

Step 402: The requesting device sends a request for obtaining status information of each established connection to the ProSe server, where the status information includes the CSI of the established connection.

Step 403: The ProSe server acquires status information of each established connection and feeds back to the requesting device.

Step 404: The requesting device divides the request content into blocks corresponding to each sharing device according to the blocking policy.

The blocking policy is: for each sharing device, setting the standby time of the sharing device and the time of the preset transmission time to be the first sending time of the sharing device, and obtaining the first sending of each sharing device. Time, the request content is divided into blocks corresponding to the sharing device according to the obtained ratio of each first sending time.

Step 405: The requesting device sends the start and stop location identifiers of each of the divided blocks to the sharing device corresponding to each of the segments by the ProSe server.

Step 406: The requesting device calculates a transmission rate of each established connection, determines a communication resource for each established connection according to a transmission rate and a CSI corresponding to each established connection, and requests the ProSe server to separately establish a connection for each connection. The corresponding determined communication resources are allocated.

The transmission rate of each established connection is a ratio of the data amount of the corresponding block to the corresponding first transmission time.

Step 407: Each sharing device separately transmits the notified segment to the requesting device.

Step 408: After receiving the block sent by the sharing device, the requesting device notifies the ProSe server to release the allocated communication resource.

Third embodiment

As shown in FIG. 5, the method provided by the embodiment of the present invention includes:

Step 501: The requesting device establishes a point-to-point D2D connection with two or more sharing devices.

Step 502: The requesting device sends a request for acquiring status information of each established connection to the ProSe server, where the status information includes the CSI of the established connection, and the moving speed, moving direction, and location information of the sharing device.

Step 503: The ProSe server acquires status information of the requesting device request and feeds back to the requesting device.

Step 504: The requesting device divides the request content into blocks corresponding to each sharing device according to the blocking policy.

The blocking policy is: for each sharing device, calculating a second sending time according to the moving direction, the moving speed, and the location information corresponding to the sharing device, and the second sending time of the sharing device The time when the value is smaller than the preset transmission time is set as the third sending time of the sharing device, and the third sending time of each sharing device is obtained, and the content of the request is divided into each share according to the obtained ratio of the third sending time. The corresponding block of the device.

Step 505: The requesting device sends the start and stop location identifiers of each of the divided blocks to the sharing device corresponding to each of the segments by the ProSe server.

Step 506: The requesting device calculates a transmission rate of each established connection, determines a communication resource for each established connection according to a transmission rate and a CSI corresponding to each established connection, and requests the ProSe server to separately establish a connection for each connection. The corresponding determined communication resources are allocated.

The transmission rate of each established connection is a ratio of the data amount of the corresponding block to the corresponding third transmission time.

Step 507: Each sharing device separately transmits the notified segment to the requesting device.

Step 508: After receiving the block sent by the sharing device, the requesting device notifies the ProSe server to release the allocated communication resource.

Fourth embodiment

As shown in FIG. 6, the method provided by the embodiment of the present invention includes:

Step 601: The requesting device establishes a point-to-point D2D connection with two or more sharing devices. In the device discovery in establishing a point-to-point D2D connection, the requesting device requests the sharing device to wait for the standby time corresponding to the remaining power while requesting to discover the sharing device.

Wherein, in establishing a point-to-point D2D connection, the requesting device broadcasts a discovery request message through the PC5 interface, where the information carrying the request standby time is carried. The specific definition of the discovery request message broadcasted on the PC5 interface and the PC5 refers to the 3GPP protocol. It should be noted that the discovery request message includes three fields: a ProSe Functional Code, a Requested Model, and a Meta data. The embodiment of the present invention uses the Meta data field to carry the request standby. Information about time. For the definition of the above three fields, refer to the 3GPP protocol.

Step 602: The requesting device sends a request for acquiring status information of each established connection to the ProSe server, where the status information includes the CSI of the established connection, and the moving speed, moving direction, and location information of the sharing device.

Step 603: The ProSe server acquires status information requested by the device and feeds back to the requesting device.

Step 604: The requesting device divides the request content into blocks corresponding to each sharing device according to the blocking policy.

The blocking policy is: for each sharing device, setting the standby time of the sharing device and the time of the preset transmission time to be the first sending time of the sharing device, and obtaining the first sending of each sharing device. Time; for each sharing device, calculating a second sending time according to the moving direction, the moving speed, and the position information corresponding to the sharing device, and setting a time when the first sending time and the second sending time of the sharing device are smaller as Sharing the fourth sending time of the device, obtaining a fourth sending time of each sharing device; dividing the request content into blocks corresponding to each sharing device according to the obtained ratio of each fourth sending time.

Step 605: The requesting device sends the start and stop location identifiers of each of the divided blocks to the sharing device corresponding to each of the segments by the ProSe server.

In this step, the requesting device may carry the start and end location identifier through an idle field such as a spare NULL field in a DL InformationTransfer message specified by the 3GPP protocol.

Step 606: The requesting device calculates a transmission rate of each established connection, determines a communication resource for each established connection according to a transmission rate and a CSI corresponding to each established connection, and requests the ProSe server to separately establish a connection for each connection. The corresponding determined communication resources are allocated.

The transmission rate of each established connection is a ratio of the data amount of the corresponding block to the corresponding fourth transmission time.

Let's take an established connection as an example to illustrate how to determine its communication resources.

Assuming that the fourth transmission time corresponding to the established connection is 10 seconds and the block is 100 bits, the transmission rate is 10 bits/s, and the channel rate, the ratio of the transmission rate to the channel rate is determined according to the CSI corresponding to the established connection. It is a communication resource. For example, how to determine the channel rate by using CSI is described with reference to the background art, and details are not described herein again.

Step 607: Each sharing device separately transmits the notified segment to the requesting device.

Step 608: After receiving the block sent by the sharing device, the requesting device notifies the ProSe server to release the allocated communication resource.

It should be noted that if at least one sharing device fails to transmit the notified segment to the request The device can perform the technical solution of the embodiment of the present invention again, and implement the continued block receiving of the unsuccessfully received part, and iterate until the transmission of the entire requested content is completed.

Optionally,

After obtaining the CSI of each established connection, before the step 102, the method of the embodiment of the present invention may further include:

The sharing device is set to a plurality of sharing devices whose CSI is greater than a preset CSI threshold. This avoids the requesting device from communicating with the sharing device with poor communication capability (ie, the CSI is less than or equal to the CSI threshold), thereby achieving more efficient use of communication resources.

FIG. 7 is a schematic structural diagram of a device for implementing content distribution according to an embodiment of the present invention. As shown in FIG. 7, the device can be used as both a requesting device and a sharing device. When it is used as a requesting device, it includes at least a connection establishing unit 10, a blocking unit 20, and a receiving unit 30, where

The blocking unit 20 is configured to divide the request content into blocks corresponding to each sharing device according to a pre-set blocking policy, and notify each sharing device separately;

The receiving unit 30 is configured to receive the sub-blocks sent by the corresponding sharing device respectively.

The blocking unit 20 is also arranged to:

Obtaining the CSI of each established connection through the ProSe server;

Calculating the transmission rate of each established connection, determining communication resources for each established connection according to the transmission rate and CSI corresponding to each established connection, and requesting the ProSe server to separately determine the corresponding connection for each established connection. Communication resources.

In the first embodiment of the present invention, the number of the sharing devices is N; the blocking policy is: dividing the content of the request into N blocks, and establishing a correspondence between each of the divided blocks and the sharing device; The sub-blocks may also be divided into N sub-blocks according to other strategies; the correspondence between each sub-block and each shared device may be a random correspondence, or may be corresponding according to other corresponding rules;

In the second embodiment of the present invention, the connection establishing unit 10 is further configured to: when requesting to discover the sharing device, request the standby time of the sharing device corresponding to the remaining power;

The blocking policy is: for each sharing device, setting a standby time of the sharing device and a time with a smaller value in the preset transmission time as the first sending time of the sharing device, and obtaining the first sending time of each sharing device. Dividing the request content into blocks corresponding to the sharing device according to the obtained ratio of each first sending time;

The transmission rate of each established connection is the ratio of the data amount of the corresponding block to the corresponding first transmission time.

In the third embodiment of the present invention, when the CSI of each established connection is obtained by the ProSe server, the blocking unit 20 is further configured to: obtain the motion direction, the motion speed, and the location information of each shared device by using the ProSe server;

The blocking strategy is: for each sharing device, calculating a second sending time according to the moving direction, the moving speed, and the position information corresponding to the sharing device, and the second sending time of the sharing device and the preset transmission time are smaller. The time is set to the third sending time of the sharing device, and the third sending time of each sharing device is obtained, and the requested content is divided into the blocks corresponding to the sharing device according to the obtained ratio of each third sending time;

The transmission rate of each established connection is the ratio of the data amount of the corresponding block to the corresponding third transmission time.

In the third embodiment of the present invention, when calculating the second transmission time, the blocking unit 20 is configured to: for each sharing device, calculate how long the motion is based on the motion direction, the motion speed, and the location information of the device and the sharing device. The distance between the device and the sharing device is equal to the preset maximum communication distance, and the calculated time is the second sending time corresponding to the sharing device.

When each sharing device is notified, the blocking unit 20 is configured to: send and receive the starting and ending position identifiers of each of the divided blocks to the sharing device corresponding to each of the segments by the ProSe server.

Although the embodiments disclosed in the present invention are as described above, the content described is only for ease of understanding. The embodiments employed in the invention are not intended to limit the invention. Any modification and variation in the form and details of the embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention. The scope defined by the appended claims shall prevail.

One of ordinary skill in the art will appreciate that all or a portion of the steps of the above-described embodiments can be implemented using a computer program flow, which can be stored in a computer readable storage medium, such as on a corresponding hardware platform (eg, The system, device, device, device, etc. are executed, and when executed, include one or a combination of the steps of the method embodiments.

Alternatively, all or part of the steps of the above embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve.

The devices/function modules/functional units in the above embodiments may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.

When each device/function module/functional unit in the above embodiment is implemented in the form of a software function module and sold or used as a stand-alone product, it can be stored in a computer readable storage medium. The above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.

Industrial applicability

The technical solution of the embodiment of the present invention implements that a plurality of sharing devices separately send a part of the requested content to the same requesting device, that is, the notified segment, which reduces the load of the sharing device compared to the existing point-to-point D2D communication. The ground guarantees the processing performance of the sharing device.

Claims

A method of implementing content distribution, including:

The requesting device establishes a direct communication D2D connection between the peer-to-peer devices and two or more sharing devices respectively;

The requesting device divides the request content into blocks corresponding to each sharing device according to a pre-set blocking policy, and respectively notifies each of the sharing devices;

Each of the sharing devices respectively transmits the notified segment to the requesting device.
The method of claim 1, wherein the method further comprises: after the separately establishing the point-to-point D2D connection, the method further comprises:

The requesting device separately acquires channel state information CSI of each established connection by using a proximity service ProSe server;

After the separately reporting the each sharing device, before the separately transmitting the notified segment to the requesting device, the method further includes:

The requesting device calculates a transmission rate of each of the established connections, determines a communication resource for each of the established connections according to a transmission rate and a CSI corresponding to each of the established connections, and requests the ProSe server to respectively Each of the established connections allocates a corresponding determined communication resource.
The method according to claim 1 or 2, wherein the number of the sharing devices is N; the blocking policy is: dividing the requested content into N blocks, and establishing each of the divided blocks and sharing devices Correspondence relationship;

The transmission rate of each of the established connections is the ratio of the data amount of the corresponding block to the preset transmission time.
The method according to claim 1 or 2, wherein, when the device discovery in the point-to-point D2D connection process is established, the method further comprises: the requesting device requesting the sharing device while requesting to discover the sharing device Standby time corresponding to the remaining power;

The blocking policy is: for each sharing device, setting a standby time of the sharing device and a time with a smaller value in the preset transmission time as the first sending time of the sharing device, and obtaining the The first sending time of each sharing device divides the request content into blocks corresponding to each of the sharing devices according to the obtained ratio of the first sending time of each of the sharing devices;

The transmission rate of each of the established connections is a ratio of the data amount of the corresponding block to the corresponding first transmission time.
The method according to claim 1 or 2, wherein, when the requesting device separately acquires the CSI of each of the established connections through the ProSe server, the method further comprises: the requesting device separately acquiring the Describe the movement direction, movement speed and position information of each sharing device;

The blocking policy is: for each sharing device, calculating a second sending time according to the moving direction, the moving speed, and the position information corresponding to the sharing device, and the second sending time of the sharing device and the preset transmission time value Setting a smaller time to the third sending time of the sharing device, obtaining a third sending time of each of the sharing devices, and dividing the request content into corresponding to each of the sharing devices according to the obtained ratio of each third sending time. Block

The transmission rate of each of the established connections is a ratio of the data amount of the corresponding block to the corresponding third transmission time.
The method according to claim 5, wherein the calculating the second sending time comprises: for each sharing device, calculating how long the requesting device and the elapsed time are based on the moving direction, the moving speed, and the position information of the requesting device and the sharing device The distance between the sharing devices is equal to the preset maximum communication distance, and the calculated time is the second sending time corresponding to the sharing device.
The method according to claim 1 or 2, wherein the notifying each sharing device comprises: transmitting a start and stop location identifier of each of the divided blocks, respectively, to the sharing corresponding to each of the segments by the ProSe server device.
An apparatus for realizing content distribution, comprising a connection establishing unit, a blocking unit, and a receiving unit, wherein

The connection establishing unit is configured to establish a point-to-point D2D connection with two or more sharing devices respectively;

The blocking unit is configured to divide the request content into blocks corresponding to each sharing device according to a pre-set blocking policy, and respectively notify each of the sharing devices;

The receiving unit is configured to receive a block sent by each sharing device separately.
The apparatus of claim 8 wherein said blocking unit is further configured to:

Obtaining channel state information CSI of each established connection through the ProSe server;

Calculating a transmission rate of each of the established connections, determining communication resources for each of the established connections according to a transmission rate and a CSI corresponding to each of the established connections, and requesting the ProSe server to be each of the The established connection allocates the corresponding determined communication resources.
The device according to claim 8 or 9, wherein the number of the sharing devices is N; the blocking policy is: dividing the requested content into N partitions, establishing each of the divided partitions and the Correspondence of each shared device;

The transmission rate of each of the established connections is the ratio of the data amount of the corresponding block to the preset transmission time.
The device according to claim 8 or 9, wherein the connection establishing unit is further configured to: when requesting to discover the sharing device, request a standby time of the sharing device corresponding to the remaining power;

The blocking policy is: for each sharing device, setting a standby time of the sharing device and a time with a smaller value in the preset transmission time as the first sending time of the sharing device, and obtaining the number of each of the sharing devices. a sending time, the request content is divided into the blocks corresponding to each of the sharing devices according to the obtained ratio of the first sending time of each of the sharing devices;

The transmission rate of each of the established connections is a ratio of the data amount of the corresponding block to the corresponding first transmission time.
The device according to claim 8 or 9, wherein, when the CSIs of each of the established connections are respectively acquired by the ProSe server, the blocking unit is further configured to: respectively acquire each of the shares through the ProSe server The direction of motion, speed of movement and position information of the device;

The blocking policy is: for each sharing device, calculating a second sending time according to the moving direction, the moving speed, and the position information corresponding to the sharing device, and the second sending time of the sharing device and the preset transmission time value Setting a smaller time to the third sending time of the sharing device, obtaining a third sending time of each of the sharing devices, and dividing the request content into corresponding to each of the sharing devices according to the obtained ratio of each third sending time. Block

The transmission rate of each of the established connections is the corresponding blocked data amount and the corresponding third round. The ratio of the delivery time.
The device according to claim 12, wherein, when the calculating the second transmission time, the blocking unit is configured to: according to the moving direction, the moving speed and the position of the device and the sharing device, for each sharing device The information is calculated as to how long the distance between the device and the sharing device is equal to the preset maximum communication distance, and the calculated time is the second sending time corresponding to the sharing device.
The device according to claim 8 or 9, wherein, when the notification is shared by each of the sharing devices, the blocking unit is configured to: send and receive the starting and ending position identifiers of each of the divided blocks, and respectively send them to the ProSe server. Each of the partitions corresponds to a sharing device.
A computer readable storage medium storing program instructions that, when executed by a processor, implement the method of any of claims 1-7.