CN106973407B - Service data transmission method and device - Google Patents
Service data transmission method and device Download PDFInfo
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- CN106973407B CN106973407B CN201610022614.9A CN201610022614A CN106973407B CN 106973407 B CN106973407 B CN 106973407B CN 201610022614 A CN201610022614 A CN 201610022614A CN 106973407 B CN106973407 B CN 106973407B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0231—Traffic management, e.g. flow control or congestion control based on communication conditions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/10—Flow control between communication endpoints
- H04W28/14—Flow control between communication endpoints using intermediate storage
Abstract
The embodiment of the invention discloses a method for transmitting service data, which comprises the following steps: when the UE and the wireless cache server transmit service data corresponding to the service, detecting whether the UE performs switching from a source base station to a target base station; when detecting that the UE performs switching from a source base station to a target base station, forbidding to transmit a first service data request message of a first object to a wireless cache server, and sending the first service request message to a core network for transmitting first service data; and when the switching of the UE from the source base station to the target base station is completed, if second service data which are not completely transmitted exist, controlling to continuously send the second service data to the source base station. The embodiment of the invention also discloses a device for transmitting the service data.
Description
Technical Field
The present invention relates to data transmission technologies in the field of wireless communications, and in particular, to a method and an apparatus for transmitting service data.
Background
With the development of wireless communication, in order to further improve the service experience of users in a wireless communication network, the service content is continuously sunk to shorten the distance from the users. For a Long Term Evolution (LTE) system, an evolved Node B (eNB) is a network element closest to a user, and therefore, by sinking content to the eNB, service access delay can be shortened to the maximum extent, and transmission bandwidth is saved.
In the prior art, as shown in fig. 1, a User Equipment (UE) in a conventional architecture interacts data with a service server through an eNB, a core network, a Serving GateWay (SGW)/PDN GateWay (PGW); after a wireless cache server is deployed on a base station, when a UE (user equipment) accesses a service through LTE (long term evolution), if the accessed content is cached in the wireless cache server in advance, namely cache hit occurs, the UE can directly interact service data with the wireless cache server through an eNB (evolved node B) and a content sink controller, wherein the wireless cache is used for caching service contents such as hot pages, videos and the like in advance based on a certain strategy. Specifically, in order to implement the wireless caching function, the content sink controller needs to have a DPI function and a route forwarding function, and analyzes a resource request message (such as an Http request message) sent by a user through the DPI function, and if an object (such as a picture, a video fragment, and the like) requested in the request message is hit, forwards the request message to the wireless caching server through the route forwarding function to interact service data, or passes the request message through a core network to interact service data.
However, with the implementation scheme in the prior art, when the cache is hit, since the service data transmission required by the UE is directly obtained from the wireless cache server without passing through the core network, when the UE is handed over from the source base station to the target base station, the mechanism for ensuring the service continuity through the service anchor of the SGW/PGW is disabled. Therefore, after the UE downloading the service data from the wireless cache server is switched from the source base station to the target base station, the wireless cache server of the source base station cannot be accessed, and the transmission of the service data which is not downloaded cannot be continued, so that service interruption is caused, which seriously affects user perception for the application which does not support breakpoint transmission.
Disclosure of Invention
In order to solve the above technical problems, embodiments of the present invention are expected to provide a method and an apparatus for transmitting service data, which can ensure continuity of service data transmission and improve user experience in a process of switching between a source base station and a target base station.
The technical scheme of the invention is realized as follows:
the embodiment of the invention provides a method for transmitting service data, which comprises the following steps:
when User Equipment (UE) and a wireless cache server transmit service data corresponding to a service, detecting whether the UE performs switching from a source base station to a target base station;
when detecting that the UE performs switching from the source base station to the target base station, forbidding to transmit a first service data request message of a first object to a wireless cache server, and sending the first service request message to a core network for transmission of first service data, wherein the first object is an object which has not been subjected to service data transmission, and the wireless cache server corresponds to the source base station;
when the switching of the UE from the source base station to the target base station is completed, if second service data which is not completely transmitted exists, controlling to continuously send the second service data to the source base station, wherein the second service data is service data of a second object which is being transmitted by the UE during the switching from the source base station to the target base station.
In the foregoing solution, when the handover of the UE from the source base station to the target base station is completed, if there is second service data that is not completely transmitted, controlling to continue sending the second service data to the source base station includes:
and if the second service data which is not completely transmitted exists, sending a confirmation data packet to the wireless cache server, so that the wireless cache server continues to send the second service data to the source base station according to the confirmation data packet.
In the foregoing solution, when the handover of the UE from the source base station to the target base station is completed, if there is second service data that is not completely transmitted, controlling to continue sending the second service data to the source base station includes:
and if the second service data which is not transmitted completely exists and an end data packet is received, sending the end data packet to the source base station when the second service data is transmitted completely so as to end the service data transmission corresponding to the first service by the UE.
In the foregoing solution, if there is the second service data that is not completely transmitted and an end data packet is received, when the second service data is completely transmitted, sending the end data packet to the source base station includes:
receiving the end data packet;
if the second service data which are not transmitted completely exist, the end data packet is reserved;
and when the second service data is transmitted, sending the ending data packet to the source base station.
In the foregoing solution, the detecting whether the UE performs handover from a source base station to a target base station includes:
detecting whether a handover message is received, wherein the handover message comprises at least one of a handover request message sent by the source base station and a handover request confirmation message sent by the target base station;
if the switching message is received, representing that the UE is switched from the source base station to the target base station;
and if the switching message is not received, representing that the UE is not switched from the source base station to the target base station.
In the foregoing solution, the detecting whether the UE performs handover from a source base station to a target base station includes:
detecting whether a notification message sent by the source base station is received, wherein the notification message is used for representing that the UE is switched from the source base station to the target base station;
if the notification message is received, the representation detects that the UE is switched from the source base station to the target base station;
and if the notification message is not received, the representation detects that the UE is not switched from the source base station to the target base station.
The embodiment of the invention provides a transmission device of service data, which comprises:
the system comprises a detection unit, a wireless cache server and a base station, wherein the detection unit is used for detecting whether the UE is switched from a source base station to a target base station or not when the UE and the wireless cache server perform service data transmission corresponding to a service;
a sending unit, configured to prohibit transmission of a first service data request message of a first object to a wireless cache server when the detecting unit detects that the UE performs handover from the source base station to the target base station, and send the first service request message to a core network to perform transmission of first service data, where the first object is an object for which transmission of the service data has not been performed yet, and the wireless cache server corresponds to the source base station; and when the detection unit detects that the handover of the UE from the source base station to the target base station is completed, if there is second service data that is not completely transmitted, controlling to continue sending the second service data to the source base station, where the second service data is service data of a second object that is being transmitted by the UE during the handover from the source base station to the target base station.
In the foregoing scheme, the sending unit is specifically configured to send a confirmation data packet to the wireless cache server if the detecting unit detects that there is the second service data that is not completely transmitted, so that the wireless cache server continues to send the second service data to the source base station according to the confirmation data packet.
In the foregoing scheme, the sending unit is specifically configured to send, if the detecting unit detects that the second service data that is not completely transmitted exists and the receiving unit receives the end data packet, the end data packet to the source base station when the second service data is completely transmitted, so as to end service data transmission corresponding to the first service by the UE.
In the foregoing solution, the apparatus for transmitting service data further includes: the receiving unit and the reserving unit;
the receiving unit is used for receiving the end data packet;
the reservation unit is configured to reserve the end data packet received by the receiving unit if the detecting unit detects that the second service data that is not completely transmitted exists;
the sending unit is further specifically configured to send the end data packet received by the receiving unit to the source base station when the detecting unit detects that the second service data is completely transmitted.
In the foregoing solution, the detecting unit is specifically configured to detect whether a receiving unit receives a handover message, where the handover message includes at least one of a handover request message sent by the source base station and a handover request acknowledgement message sent by the target base station; if the receiving unit receives the switching message, the UE is characterized to switch from the source base station to the target base station; if the receiving unit does not receive the switching message, the UE is characterized not to be switched from the source base station to the target base station.
In the foregoing solution, the receiving unit is further configured to detect whether a notification message sent by the source base station is received, where the notification message is used to characterize that the UE is about to be handed over from the source base station to the target base station;
the detecting unit is specifically configured to, if the receiving unit receives the notification message, characterize that it is detected that the UE is about to be switched from the source base station to the target base station; and if the receiving unit does not receive the notification message, the representation detects that the UE is not switched from the source base station to the target base station.
The embodiment of the invention provides a method and a device for transmitting service data, wherein when UE (user equipment) and a wireless cache server transmit service data corresponding to a service, the device for transmitting the service data detects whether the UE is switched from a source base station to a target base station; when detecting that the UE performs switching from a source base station to a target base station, forbidding to transmit a first service data request message of a first object to a wireless cache server, and sending the first service request message to a core network to perform transmission of first service data, wherein the first object is an object which is not subjected to service data transmission, and the wireless cache server corresponds to the source base station; and when the switching of the UE from the source base station to the target base station is completed, if second service data which are not transmitted completely exist, controlling to continuously send the second service data to the source base station, wherein the second service data are service data of a second object which are transmitted by the UE during the switching from the source base station to the target base station. By adopting the technical scheme, the transmission device of the service data can timely stop the source base station from transmitting the service data of the object which is not started to be transmitted from the wireless cache server when the UE is found to be switched, so that the phenomenon of data loss which is possibly caused when the service data is transmitted to the target base station through the source base station is avoided; and after the UE completes the handover, the transmission apparatus of the service data can control the wireless server to continue transmitting the second service data being transmitted, so that the source base station can continue to transmit the remaining second service data to the UE through the target base station, so that the UE does not have service interruption. Therefore, the transmission device of the service data can ensure the continuity of service data transmission and improve the user experience in the process of switching the source base station and the target base station.
Drawings
Fig. 1 is a system architecture diagram based on a service data transmission method according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for transmitting service data according to an embodiment of the present invention;
fig. 3 is an interaction diagram of a service data transmission method according to an embodiment of the present invention;
fig. 4 is a first schematic structural diagram of a service data transmission apparatus (content sink controller) according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a service data transmission apparatus (content sink controller) according to an embodiment of the present invention;
fig. 6 is a third schematic structural diagram of a service data transmission apparatus (content sink controller) according to an embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
It should be noted that a UE (User Equipment) may be a wireless terminal or a wired terminal, and the wireless terminal may be a device that only provides voice and/or data connectivity to a User, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem. Wireless terminals, which may be mobile terminals such as mobile telephones (or "cellular" telephones) and computers having mobile terminals, such as portable, pocket, hand-held, computer-included, or vehicle-mounted mobile devices, may communicate with one or more core networks via a RAN (Radio access network) to exchange speech and/or data with a Radio access network. For example, PCS (Personal Communication Service) phones, cordless phones, Session Initiation Protocol (SIP) phones, WLL (Wireless Local Loop) stations, PDAs (Personal Digital assistants), and the like. A wireless Terminal may also be referred to as a system, a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a Mobile Station (Mobile), a Remote Station (Remote Station), an Access Point (Access Point), a Remote Terminal (Remote Terminal), an Access Terminal (Access Terminal), a User Terminal (User Terminal), a User Agent (User Agent), or a User equipment.
Optionally, the transmission device of the service data in the embodiment of the present invention may be disposed in a base station or a wireless cache server, or may be an independent network element, which is described in detail below by taking the transmission device of the service data as a content sink controller as an example.
Example one
It should be noted that the method for transmitting service data provided by the embodiment of the present invention is implemented based on the architecture shown in fig. 1. The application premise of the embodiment of the invention is that when a user sends service data corresponding to a service to a network side through UE, the service data is the existing data in the wireless cache server, namely cache hit.
An embodiment of the present invention provides a method for transmitting service data, as shown in fig. 2, the method may include:
s101, when UE and a wireless cache server transmit service data corresponding to a service, whether the UE is switched from a source base station to a target base station is detected.
It should be noted that, when the UE sends the service data corresponding to one service to the network side, the one service may include a plurality of objects, and thus, when the UE requests the service data of the one service from the network side, the UE sends a corresponding request message according to each object to download or acquire the service data corresponding to each object.
Specifically, the UE may send a request message corresponding to the first object to the source base station, and the source base station obtains the service data of the first object requested by the UE from the wireless cache server through the content sink controller.
When the UE performs service data transmission corresponding to a service with the wireless cache server, a situation may occur in which the UE needs to be handed over from a source base station to a target base station due to movement of the UE and the like. Once such a situation occurs, the ongoing traffic data transmission flow of the UE through the source base station may change to adapt to the situation.
Specifically, when the UE and the wireless cache server perform service data transmission corresponding to a service, the content sink server may first detect whether the UE is performing handover from a source base station to a target base station or is about to perform handover from the source base station to the target base station, so that the content sink controller performs adjustment of corresponding service data transmission. That is, in the embodiment of the present invention, the content convergence controller detects whether the UE performs handover from the source base station to the target base station includes two meanings: one is that the content sink controller detects whether a handover is in progress from the source base station to the target base station; the other is that the content sink controller detects whether a handover from the source base station to the target base station will occur.
Further, (1) for the content convergence controller to detect whether the handover from the source base station to the target base station is in progress, specifically, the method may include: the content sink controller detects whether a switching message is received, wherein the switching message comprises at least one of a switching request message sent by a source base station and a switching request confirmation message sent by a target base station; if receiving the switching message, representing and detecting that the UE is switched from the source base station to the target base station; and if the switching message is not received, the representation detects that the UE is not switched from the source base station to the target base station. (2) The content sink controller may detect whether a handover from the source base station to the target base station will occur, specifically: calculating a first probability that the UE will switch from the source base station to the target base station according to a first parameter, wherein the first parameter is a performance parameter of the UE; when the first probability is larger than or equal to a preset threshold, detecting that the UE is switched from the source base station to the target base station; when the first probability is below a preset threshold, it is detected that the UE will not be handed over from the source base station to the target base station.
It should be noted that, the handover message may include at least one of a handover request message sent by the source base station and a handover request acknowledgement message sent by the target base station; therefore, the content sink controller may receive the handover message only when the content sink controller receives at least one of the handover request message and the handover request acknowledgement message, and the content sink controller may not receive the handover message only when the content sink controller does not receive any of the handover request message and the handover request acknowledgement message, i.e., when neither of the handover request message or the handover request acknowledgement message is received.
Further, the content sink controller may monitor signaling received and transmitted by the source base station through the DPI function, and may confirm that the corresponding UE is performing handover when detecting the handover request or the handover request acknowledgement message. In addition, the content sink controller may also be informed by the source base station of the message when the UE is handed over. Specific implementation the embodiments of the present invention are not limited.
Specifically, in the embodiment of the present invention, the source base station may try to avoid the situation that the UE is still downloading data from the wireless cache server during handover by performing handover prejudgment. The source base station calculates a first probability that the UE will perform handover from the source base station to the target base station according to the first parameter. And when the first probability is lower than a preset threshold, the source base station sends a notification message to the content sink controller, so that the content sink controller detects that the UE is switched from the source base station to the target base station, wherein the notification message is used for representing that the UE is switched from the source base station to the target base station. When the first probability is greater than or equal to the preset threshold, the source base station does not send a notification message to the content sink controller, so that the content sink controller does not detect that the UE is to be switched from the source base station to the target base station.
Optionally, the first parameter includes: at least one of a signal quality of the UE, a moving speed of the UE, and location information of the UE.
In detail, (1) signal quality of the UE. The signal quality of the UE is obtained through measurement and reporting, and the probability of switching is estimated according to the difference Delta between the measurement result and the switching judgment threshold. The signal quality related handover probability P sig for the UE is a piecewise function, as follows:
wherein, the value of speed _ sig _ high is usually 5dB, and the value of speed _ sig _ low is usually 1dB, and can be adjusted according to experience.
For example, assuming that the blind handover decision condition of the source cell where the UE is located is Reference Signal Received Power (RSRP) < -110dBm, the handover decision threshold is-110. And when the RSRP measured by the UE is < -109dBm, the UE switching probability is considered to be 0, and when the RSRP measured by the UE is < -104dBm, the UE is considered to be about to be switched, and the switching probability is 100%.
It should be noted that, the form of the handover decision threshold is not limited in the embodiments of the present invention, and may be implemented according to practical applications. For example: if the switching judgment condition of the source cell where the UE is located is that the signal intensity of the adjacent cell is 3dB higher than that of the cell (considering factors such as switching delay), the switching judgment threshold is 3dB, when the signal intensity of the adjacent cell measured by the UE is 2dB higher than that of the cell, the UE is considered to be about to switch, the switching probability is 100%, and the rest is similar.
(2) The moving speed of the UE. The UE moving Speed is obtained by measuring UE historical handover information or doppler shift, and the specific measurement method is the prior art and will not be discussed here. Considering the measurement accuracy and other factors, the moving speed of the UE is simply divided into two stages, namely low speed and non-low speed (the specific threshold setting may be determined according to the actual use situation, and the embodiment of the present invention is not limited). Specifically, the handover probability P _ speed related to the moving speed of the UE is a piecewise function, as follows:
(3) location information of the UE. The location information of the UE can be obtained based on a positioning algorithm, and is simply divided into two categories, cell edge and non-cell edge. The handover probability P _ pos associated with the location information of the UE is a piecewise function, as follows:
this gives: the final switching probability P of the UE is P _ sig × W1 + P _ speed × W2 + P _ pos × W3. W1, W2, and W3 are weights corresponding to the signal quality of the UE, the moving speed of the UE, and the location information of the UE, respectively, and W1 + W2 + W3 is equal to 1. Usually, W1 takes on the value of 0.6, and W2 \ W3 takes on the value of 0.2.
Then, when P is smaller than the preset threshold, it is determined that the UE will not be handed over, and the source base station does not process the UE; and when the P is more than or equal to the preset threshold, the UE is considered to be about to be switched, and the source base station informs the content sink controller to enable the content sink controller to suspend the use of the wireless cache function.
Optionally, the default value of the preset threshold may be 50%, and the specific setting of the value of the preset threshold is not limited in the embodiment of the present invention.
It should be noted that, since the first parameter in the embodiment of the present invention may include: at least one of a signal quality of the UE, a moving speed of the UE, and location information of the UE. Therefore, when the first parameter has only a part of the three parameters, the handover probability of the UE is realized by the probability calculated according to the part of the parameters.
Preferably, the first parameter in the embodiment of the present invention includes only the signal quality of the UE. Thus, the preset threshold is a handover decision threshold for deciding a probability related to the signal quality of the UE, and the handover probability of the UE is P _ sig.
Further, the type of the first parameter in the embodiment of the present invention is not limited as long as a predetermined decision can be made on handover to be performed by the UE.
S102, when it is detected that the UE performs switching from a source base station to a target base station, a first service data request message of a first object is forbidden to be transmitted to a wireless cache server, and the first service request message is sent to a core network to perform transmission of first service data, wherein the first object is an object which has not yet performed service data transmission, and the wireless cache server corresponds to the source base station.
After detecting whether the UE is switched from the source base station to the target base station or not, when the UE is detected to be switched from the source base station to the target base station, the content sink controller prohibits transmission of a first service data request message of a first object to a wireless cache server, and sends the first service request message to a core network so as to transmit first service data, wherein the first object is an object which is not transmitted with service data, and the wireless cache server corresponds to the source base station.
It should be noted that, when the UE sends the service data corresponding to one service to the network side, the service may include multiple objects, so that when the UE requests the service data of the one service from the network side, the UE sends a corresponding request message according to each object to download or acquire the service data corresponding to each object. Therefore, after the UE can send a request message corresponding to a first object to the source base station, and the source base station obtains the service data of the first object requested by the UE from the wireless cache server through the content sink controller, the UE can start to perform a request message corresponding to a second object to obtain the service data corresponding to the second object.
It should be noted that, the source base station where the UE is located may pre-determine in advance whether the UE is about to be handed over, and when it is determined that the UE is likely to be handed over, the source base station notifies the content sink controller, so that the content sink controller may suspend using the function of the wireless cache. In the embodiment of the invention, whether the cache hit exists or not, the new object request message requested by the UE is completely transmitted to the core network through the core network, and is served by the core network, but the transmission of the object which is being downloaded from the wireless cache server is not influenced, namely, the cache is suspended to only influence the downloading of the new object.
The first object in the embodiment of the present invention refers to a class of objects which are requested by the UE but not started to be requested in one service.
For example, when a user opens a picture browser, since the picture browser may include 8 pictures, the mobile phone first sends a request message for a first picture to the wireless cache server, so that other pictures except the first picture do not start to make a request for picture content, and therefore, the other 7 pictures may be the first objects in the embodiment of the present invention.
S103, when the UE is switched from the source base station to the target base station, if second service data which is not completely transmitted exists, controlling to continuously send the second service data to the source base station, wherein the second service data is service data of a second object which is transmitted by the UE during the switching from the source base station to the target base station.
When the UE is switched from the source base station to the target base station, if there is second service data that is not completely transmitted, that is, the second service data is not obtained from the wireless cache server, the content sink controller controls the sending process to continuously send the second service data to the source base station, so that the source base station transmits the second service data to the UE through the target base station.
For example, when a user opens a picture browser, because the picture browser may include 8 pictures, the mobile phone first sends a request message of a first picture to the wireless cache server, and when the mobile phone is still acquiring the content of the first picture, if the mobile phone is to perform a handover from a source base station to a target base station, the first picture that is acquiring the content of the picture is a second object in the embodiment of the present invention, and the picture content of the first picture is service data corresponding to the second object.
It should be noted that, because the source base station obtains the second service data corresponding to the second object from the wireless cache server through the content sink controller, the content sink controller may obtain the total size of the second service data and the size of the transmitted second service data from the wireless cache server. In addition, in the transmission process of the second service data, when the source base station acquires the second service data from the wireless cache server through the content sink controller, the second service data is transmitted for multiple times according to the preset byte transmitted each time. Since the UE cannot access the wireless cache server of the source base station after being switched to the target base station, in order to avoid service interruption, the source base station needs to switch all the remaining contents of the download object (the second object) that have not been transferred to the target base station. And because there is window restriction in the Transmission Control Protocol (TCP), after the wireless cache server has transmitted a preset byte of second service data, the wireless cache server needs to receive ACK (acknowledgement) feedback from the source base station to continue to transmit the remaining second service data, and after the UE is switched to the target base station, the source base station cannot acquire feedback information of the UE, and cannot transmit an ACK feedback packet (acknowledgement packet) to the wireless cache server. For such a situation, after the handover occurs, the content sink controller in the embodiment of the present invention may construct an ACK feedback packet (generally referred to as a false ACK packet) through the simulated UE and send the ACK feedback packet to the wireless cache server, so as to avoid the TCP window restriction, and allow the wireless cache server to continue to send the remaining second service data corresponding to the second object to the source base station through the content sink controller.
Therefore, specifically, when the handover of the UE from the source base station to the target base station is completed, if there is second service data that is not completely transmitted, controlling to continue sending the second service data to the source base station includes: and if the second service data which is not completely transmitted exists, sending an acknowledgement data packet (ACK feedback packet) to a wireless cache server, continuing sending the second service data to the source base station by the wireless cache server according to the acknowledgement data packet, transmitting the second service data to the UE by the source base station through the target base station, and transmitting the second service data which is the service data of a second object during the switching of the UE from the source base station to the target base station.
Optionally, the preset byte may be 1000 bytes, and the specific size of the preset byte may be determined according to an actual situation, which is not limited in the embodiment of the present invention.
It should be further noted that, in the data switching process, the gateway acquires and sends the first service data corresponding to the first object requested by the UE to the source base station through the service server, so that the source base station sends the first service data to the UE through the target base station. After the gateway sends the last data packet of the first service data to the source base station, the gateway sends an end Marker packet (end data packet) to the source base station through a GPRS tunneling Protocol (GPRS tunneling Protocol) on a user plane, and the source base station removes a switching link (the switching link is used for data transmission between the source base station and the target base station and is established when the source base station and the target base station are switched) after receiving the end Marker packet. After the service sinks, when the first service data is completely transmitted, because the second service data which is not completely transmitted is not sent through the gateway, the gateway is likely to send an end Marker packet quickly, the source base station is likely to switch the second service data sent from the wireless cache server at the moment, and if the switching link is removed at the moment, the switching is failed, so that the content sink controller intercepts the end Marker packet, and sends the end Marker packet to the source base station after the wireless cache server completely sends the service data content corresponding to the second object to the source base station and switches the service data content to the target base station.
Therefore, specifically, when the handover of the UE from the source base station to the target base station is completed, if there is second service data that is not completely transmitted, controlling to continue sending the second service data to the source base station includes: and if the second service data which is not transmitted completely exists and the end data packet is received, sending the end data packet to the source base station when the second service data is transmitted completely so as to end the service data transmission corresponding to the first service by the UE.
In the method for transmitting service data provided by the embodiment of the invention, when the UE and the wireless cache server transmit the service data corresponding to the service, the content sink controller detects whether the UE is switched from the source base station to the target base station; when detecting that the UE performs switching from a source base station to a target base station, forbidding to transmit a first service data request message of a first object to a wireless cache server, and sending the first service request message to a core network to perform transmission of first service data, wherein the first object is an object which is not subjected to service data transmission, and the wireless cache server corresponds to the source base station; and when the switching of the UE from the source base station to the target base station is completed, if second service data which are not transmitted completely exist, controlling to continuously send the second service data to the source base station, wherein the second service data are service data of a second object which are transmitted by the UE during the switching from the source base station to the target base station. By adopting the technical scheme, the content sink controller can timely stop the source base station from transmitting the service data of the object which is not started to be transmitted from the wireless cache server when the UE is found to be switched, so that the phenomenon of data loss which is possibly caused when the service data is transmitted to the target base station through the source base station is avoided; and the content sink controller can control the wireless server to continue to transmit the second service data being transmitted after the UE completes the handover, so that the source base station can continue to transmit the remaining second service data to the UE through the target base station, so that the UE does not have service interruption. Therefore, the content sink controller can ensure the continuity of service data transmission and improve the user experience in the process of switching the source base station and the target base station.
Example two
An embodiment of the present invention provides a method for transmitting service data, and as shown in fig. 3, the method is a service data transmission interaction process, and may include:
s201, the content sink controller receives a second object request message sent by the UE through the source base station.
S202, the content sink controller acquires second service data requested by a second object request message from a wireless cache server through the target base station, wherein the wireless cache server corresponds to the source base station.
S203, the source base station acquires a first parameter from the UE, wherein the first parameter is a performance parameter of the UE.
Optionally, the first parameter includes: at least one of a signal quality of the UE, a moving speed of the UE, and location information of the UE.
S204, the source base station calculates a first probability that the UE will switch from the source base station to the target base station according to the first parameter.
And S205, when the first probability is lower than a preset threshold, the source base station sends a notification message to the content sink controller, so that the content sink controller detects that the UE is switched from the source base station to the target base station, wherein the notification message is used for representing that the UE is switched from the source base station to the target base station.
And S206, when the first probability is larger than or equal to the preset threshold, the source base station does not send a notification message to the content sink controller, so that the content sink controller does not detect that the UE is switched from the source base station to the target base station.
And S207, the source base station sends a request switching message to the content sink controller.
And S208, the switching request confirmation message sent by the target base station is sent to the content sink controller.
S209, if the content sink controller does not receive the request switching message and the switching request confirmation message, the content sink controller detects that the UE is not switched from the source base station to the target base station.
S210, if the content sink controller receives any one of the request switching message and the switching request confirmation message, the content sink controller is characterized to detect that the UE is switched from the source base station to the target base station.
It should be noted that S203-S206 and S207-S210 are optional steps before S211, and before S211, S203-S206 may be selectively executed, or S207-S210 may be selectively executed, and a specific execution sequence may be determined according to an actual situation, which is not limited in the embodiment of the present invention.
S211, when it is detected that the UE performs handover from the source base station to the target base station, the content convergence controller prohibits transmission of a first service data request message of a first object to the wireless cache server, where the first object is an object for which service data transmission has not been performed yet.
S212, the content sink controller sends the first service request message to the core network.
It should be noted that the content convergence controller sends the first service request message to the core network through the gateway.
S213, the core network transmits the first service data to the UE through the target base station.
It should be noted that the core network is the first service data acquired from the service server.
And S214, when the UE is switched from the source base station to the target base station, if the second service data which is not completely transmitted exists, the content sink controller sends a confirmation data packet to the wireless cache server.
S215, the wireless cache server continues to send the second service data to the source base station according to the confirmation data packet.
S216, the source base station continuously sends the second service data to the UE through the target base station.
And S217, when the UE is switched from the source base station to the target base station, the content sink controller receives an end data packet sent by the core network.
And S218, if the second service data which is not transmitted completely exists, the content sink controller reserves the end data packet.
And S219, when the second service data is transmitted, the content sink controller sends an end data packet to the source base station to end the service data transmission corresponding to the first service by the UE.
It should be noted that, implementation of the steps in the embodiments of the present invention has been described in detail in the foregoing embodiments, and reference may be made to the description in the foregoing embodiments, which are not repeated herein.
In the method for transmitting service data provided by the embodiment of the invention, when the UE and the wireless cache server transmit the service data corresponding to the service, the content sink controller detects whether the UE is switched from the source base station to the target base station; when detecting that the UE performs switching from a source base station to a target base station, forbidding to transmit a first service data request message of a first object to a wireless cache server, and sending the first service request message to a core network to perform transmission of first service data, wherein the first object is an object which is not subjected to service data transmission, and the wireless cache server corresponds to the source base station; and when the switching of the UE from the source base station to the target base station is completed, if second service data which are not transmitted completely exist, controlling to continuously send the second service data to the source base station, wherein the second service data are service data of a second object which are transmitted by the UE during the switching from the source base station to the target base station. By adopting the technical scheme, the content sink controller can timely stop the source base station from transmitting the service data of the object which is not started to be transmitted from the wireless cache server when the UE is found to be switched, so that the phenomenon of data loss which is possibly caused when the service data is transmitted to the target base station through the source base station is avoided; and the content sink controller can control the wireless server to continue to transmit the second service data being transmitted after the UE completes the handover, so that the source base station can continue to transmit the remaining second service data to the UE through the target base station, so that the UE does not have service interruption. Therefore, the content sink controller can ensure the continuity of service data transmission and improve the user experience in the process of switching the source base station and the target base station.
EXAMPLE III
As shown in fig. 4, according to an embodiment of the present invention, a content sink controller 10 may include:
a detecting unit 100, configured to detect whether a UE performs handover from a source base station to a target base station when the UE performs service data transmission corresponding to a service with a wireless cache server.
A sending unit 101, configured to prohibit transmission of a first service data request message of a first object to a wireless cache server when the detecting unit 100 detects that the UE performs handover from the source base station to the target base station, and send the first service request message to a core network to perform transmission of first service data, where the first object is an object that has not yet performed transmission of the service data, and the wireless cache server corresponds to the source base station; and when the detecting unit 100 detects that the handover of the UE from the source base station to the target base station is completed, if there is second service data that is not completely transmitted, controlling to continue sending the second service data to the source base station, where the second service data is service data of a second object that is being transmitted by the UE during the handover from the source base station to the target base station.
Optionally, the sending unit 101 is specifically configured to send a confirmation data packet to the wireless cache server if the detecting unit 100 detects that there is second service data that is not completely transmitted, so that the wireless cache server continues to send the second service data to the source base station according to the confirmation data packet.
Optionally, the sending unit 101 is specifically configured to, if the detecting unit 100 detects that the second service data that is not completely transmitted exists and the receiving unit 102 receives the end data packet, send the end data packet to the source base station when the second service data is completely transmitted, so as to end service data transmission corresponding to the first service by the UE.
Optionally, as shown in fig. 5, the apparatus for transmitting service data further includes: the receiving unit 102 and the reserving unit 103.
The receiving unit 102 is configured to receive the end data packet.
The reserving unit 103 is configured to reserve the end data packet received by the receiving unit 102 if the detecting unit 100 detects that the second service data which is not completely transmitted exists.
The sending unit 101 is further specifically configured to send the end data packet received by the receiving unit 102 to the source base station when the detecting unit 100 detects that the second service data is completely transmitted.
Optionally, the detecting unit 100 is specifically configured to detect whether the receiving unit 102 receives a handover message, where the handover message includes at least one of a handover request message sent by the source base station and a handover request acknowledgement message sent by the target base station; if the receiving unit 102 receives the handover message, it characterizes that the UE performs handover from the source base station to the target base station; if the receiving unit 102 does not receive the handover message, it represents that the UE is not performing handover from the source base station to the target base station.
Optionally, the receiving unit 102 is further configured to detect whether a notification message sent by the source base station is received, where the notification message is used to characterize that the UE is about to be handed over from the source base station to the target base station.
The detecting unit 100 is specifically configured to, if the receiving unit 102 receives the notification message, characterize that it is detected that the UE is about to be switched from the source base station to the target base station; and if the receiving unit 102 does not receive the notification message, it is characterized that it is detected that the UE will not be switched from the source base station to the target base station.
Optionally, the content sink controller is a logic function entity, and may be integrated in the base station or the wireless cache server, or may be an independent network element.
In practical applications, as shown in fig. 6, the detecting unit 100 may be implemented by a processor located on the content sink controller 10, specifically, a Central Processing Unit (CPU), a Microprocessor (MPU), a Digital Signal Processor (DSP) or a Field Programmable Gate Array (FPGA), the transmitting unit 101 may be implemented by a transmitter, the receiving unit 102 may be implemented by a transmitter, the retaining unit 103 may be implemented by a memory, specifically, each object request message and its software code, service data and its software code corresponding to each object, an acknowledgement data packet and its software code, and an end data packet and its software code may be stored in the memory, and the memory, the receiver, and the transmitter may be connected to the processor through a system bus, wherein the memory is used for storing executable program codes, the program codes include computer operating instructions, and the memory may include a high-speed RAM memory, non-volatile memory, such as at least one disk memory, may also be included.
The content sink controller provided by the embodiment of the invention detects whether the UE performs switching from a source base station to a target base station or not when the UE performs service data transmission corresponding to a service with a wireless cache server; when detecting that the UE performs switching from a source base station to a target base station, forbidding to transmit a first service data request message of a first object to a wireless cache server, and sending the first service request message to a core network to perform transmission of first service data, wherein the first object is an object which is not subjected to service data transmission, and the wireless cache server corresponds to the source base station; and when the switching of the UE from the source base station to the target base station is completed, if second service data which are not transmitted completely exist, controlling to continuously send the second service data to the source base station, wherein the second service data are service data of a second object which are transmitted by the UE during the switching from the source base station to the target base station. By adopting the technical scheme, the content sink controller can timely stop the source base station from transmitting the service data of the object which is not started to be transmitted from the wireless cache server when the UE is found to be switched, so that the phenomenon of data loss which is possibly caused when the service data is transmitted to the target base station through the source base station is avoided; and the content sink controller can control the wireless server to continue to transmit the second service data being transmitted after the UE completes the handover, so that the source base station can continue to transmit the remaining second service data to the UE through the target base station, so that the UE does not have service interruption. Therefore, the content sink controller can ensure the continuity of service data transmission and improve the user experience in the process of switching the source base station and the target base station.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (12)
1. A method for transmitting service data, comprising:
when User Equipment (UE) and a wireless cache server transmit service data corresponding to a service, detecting whether the UE performs switching from a source base station to a target base station;
when detecting that the UE performs switching from the source base station to the target base station, forbidding to transmit a first service data request message of a first object to a wireless cache server, and sending the first service request message to a core network for transmission of first service data, wherein the first object is an object which has not been subjected to service data transmission, and the wireless cache server corresponds to the source base station;
when the switching of the UE from the source base station to the target base station is completed, if second service data which is not completely transmitted exists, controlling to continuously send the second service data to the source base station, wherein the second service data is service data of a second object which is being transmitted by the UE during the switching from the source base station to the target base station.
2. The method of claim 1, wherein when the handover of the UE from the source base station to the target base station is completed, if there is second traffic data that is not completely transmitted, controlling to continue sending the second traffic data to the source base station comprises:
and if the second service data which is not completely transmitted exists, sending a confirmation data packet to the wireless cache server, so that the wireless cache server continues to send the second service data to the source base station according to the confirmation data packet.
3. The method of claim 1, wherein when the handover of the UE from the source base station to the target base station is completed, if there is second traffic data that is not completely transmitted, controlling to continue sending the second traffic data to the source base station comprises:
and if the second service data which is not transmitted completely exists and an end data packet is received, sending the end data packet to the source base station when the second service data is transmitted completely so as to end the service data transmission corresponding to the first service by the UE.
4. The method of claim 3, wherein if there is the second service data that is not completely transmitted and an end data packet is received, sending the end data packet to the source base station after the second service data is completely transmitted, comprises:
receiving the end data packet;
if the second service data which are not transmitted completely exist, the end data packet is reserved;
and when the second service data is transmitted, sending the ending data packet to the source base station.
5. The method of claim 1, wherein the detecting whether the UE performs handover from a source base station to a target base station comprises:
detecting whether a handover message is received, wherein the handover message comprises at least one of a handover request message sent by the source base station and a handover request confirmation message sent by the target base station;
if the switching message is received, representing that the UE is switched from the source base station to the target base station;
and if the switching message is not received, representing that the UE is not switched from the source base station to the target base station.
6. The method of claim 1, wherein the detecting whether the UE performs handover from a source base station to a target base station comprises:
detecting whether a notification message sent by the source base station is received, wherein the notification message is used for representing that the UE is switched from the source base station to the target base station;
if the notification message is received, the representation detects that the UE is switched from the source base station to the target base station;
and if the notification message is not received, the representation detects that the UE is not switched from the source base station to the target base station.
7. A device for transmitting service data, comprising:
the system comprises a detection unit, a wireless cache server and a base station, wherein the detection unit is used for detecting whether the UE is switched from a source base station to a target base station or not when the UE and the wireless cache server perform service data transmission corresponding to a service;
a sending unit, configured to prohibit transmission of a first service data request message of a first object to a wireless cache server when the detecting unit detects that the UE performs handover from the source base station to the target base station, and send the first service request message to a core network to perform transmission of first service data, where the first object is an object for which transmission of the service data has not been performed yet, and the wireless cache server corresponds to the source base station; and when the detection unit detects that the handover of the UE from the source base station to the target base station is completed, if there is second service data that is not completely transmitted, controlling to continue sending the second service data to the source base station, where the second service data is service data of a second object that is being transmitted by the UE during the handover from the source base station to the target base station.
8. The apparatus of claim 7,
the sending unit is specifically configured to send a confirmation data packet to the wireless cache server if the detecting unit detects that the second service data which is not completely transmitted exists, so that the wireless cache server continues to send the second service data to the source base station according to the confirmation data packet.
9. The apparatus of claim 7,
the sending unit is specifically configured to send the end data packet to the source base station when the second service data is transmitted, if the detecting unit detects that the second service data which is not transmitted completely exists and the receiving unit receives the end data packet, so as to end service data transmission corresponding to the first service by the UE.
10. The apparatus of claim 9, wherein the means for transmitting the traffic data further comprises: the receiving unit and the reserving unit;
the receiving unit is used for receiving the end data packet;
the reservation unit is configured to reserve the end data packet received by the receiving unit if the detecting unit detects that the second service data that is not completely transmitted exists;
the sending unit is further specifically configured to send the end data packet received by the receiving unit to the source base station when the detecting unit detects that the second service data is completely transmitted.
11. The apparatus of claim 7,
the detecting unit is specifically configured to detect whether a receiving unit receives a handover message, where the handover message includes at least one of a handover request message sent by the source base station and a handover request acknowledgement message sent by the target base station; if the receiving unit receives the switching message, the UE is characterized to switch from the source base station to the target base station; if the receiving unit does not receive the switching message, the UE is characterized not to be switched from the source base station to the target base station.
12. The apparatus of claim 7, wherein the means for transmitting the traffic data further comprises: a receiving unit;
the receiving unit is configured to detect whether a notification message sent by the source base station is received, where the notification message is used to characterize that the UE is about to be handed over from the source base station to the target base station;
the detecting unit is specifically configured to, if the receiving unit receives the notification message, characterize that it is detected that the UE is about to be switched from the source base station to the target base station; and if the receiving unit does not receive the notification message, the representation detects that the UE is not switched from the source base station to the target base station.
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