TWI739237B - Message routing system and method for mobile edge computing devices - Google Patents
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本發明係關於行動網路技術,特別是關於使用者終端於行動邊緣運算設備之服務範圍間交遞之訊務繞送系統與方法。 The present invention relates to mobile network technology, in particular to a traffic routing system and method for handover between user terminals and the service range of mobile edge computing devices.
隨著行動裝置的快速增加及網路串流服務的多樣性趨勢,使得現有行動網路(例如,4G通訊網路之分組核心演進(Evolved Packet Core,EPC)核心網路提供的行動網路)的負載越來越重。行動邊緣運算(Mobile Edge Computing,MEC)設備即是解決此問題的一種方式。藉由在MEC基地台服務範圍內透過EPC提供的行動網路使用應用伺服器(APP伺服器,例如,應用程式“line”的伺服器)的服務,使用者終端(User Equipment,UE)可在本地(localhost)卸載的情況下享用更快的服務及超低延遲的應用體驗,並且同時減輕EPC行動網路的負擔。 With the rapid increase of mobile devices and the diversified trend of network streaming services, the existing mobile network (for example, the mobile network provided by the Evolved Packet Core (EPC) core network of 4G communication network) The load is getting heavier and heavier. Mobile Edge Computing (MEC) equipment is one way to solve this problem. By using the service of the application server (APP server, for example, the server of the application "line") within the service range of the MEC base station through the mobile network provided by the EPC, the user terminal (User Equipment, UE) can Enjoy faster service and ultra-low latency application experience with local (localhost) uninstallation, and at the same time reduce the burden on the EPC mobile network.
在傳統之EPC行動網路下,當使用者移動而造成UE在不同EPC基地台間交遞(handover)時,EPC之間會互相溝通更動IP信令,使得封包下行至UE時可以正確找到使用者交遞後的EPC基地台以進行封包傳送。然而,現行MEC設備並無上述之IP資訊之溝通的機制。 Under the traditional EPC mobile network, when the user moves and causes the UE to handover between different EPC base stations, the EPC will communicate with each other and change the IP signaling, so that the packet can be correctly found and used when it is downstream to the UE. The EPC base station after handing over is used for packet transmission. However, the current MEC equipment does not have the aforementioned IP information communication mechanism.
因此,當使用者之UE在使用應用服務時自原本本地端之MEC基地台範圍交遞至鄰端MEC基地台(或自鄰端MEC基地台範圍交遞至本地端MEC基地台範圍)時,應用伺服器(APP伺服器)之封包將無法傳送至正確之MEC基地台,造成使用者終端與應用伺服器之連線中斷而無法繼續使用應用服務。 Therefore, when the user's UE is handed over from the original local MEC base station range to the neighboring MEC base station (or from the neighboring MEC base station range to the local MEC base station range) when using the application service, Packets from the application server (APP server) will not be sent to the correct MEC base station, causing the connection between the user terminal and the application server to be interrupted and the application service cannot be used.
舉例來說,第1圖係揭示習知使用MEC設備之行動網路系統之系統架構圖。在此配置下,應用伺服器(APP伺服器)120係於本地端101與MEC1 111連接、或是透過IP網路與鄰端102之MEC2 112、MEC3 113連接以提供應用服務。假設使用者終端(UE)原先在本地端101的MEC1 111之基地台(eNB1)的服務範圍內與應用伺服器120連線並使用應用服務,此時應用伺服器120將紀錄UE之來源IP(Source IP,亦可記為SrcIP)並依照UE連線至應用伺服器120之原始連線路徑以將封包下行。然而,當UE被移動至鄰端102 MEC設備之基地台服務範圍內(例如,鄰端102之MEC2 112或MEC3 113之基地台(eNB2或eNB3)的服務範圍)時,由於應用伺服器120不知道應將封包透過哪個路徑回傳,造成UE與應用伺服器120之連線中斷,直到UE透過新的基地台再次連上應用伺服器120才能繼續使用應用服務。
For example, Figure 1 shows a system architecture diagram of a conventional mobile network system using MEC equipment. In this configuration, the application server (APP server) 120 is connected to the
因此,如何建立本地端MEC設備、鄰端MEC設備與應用伺服器之間互相繞送封包之機制,以在使用者移動而造成UE在本地端MEC及鄰端MEC之基地台範圍間相互交遞下,仍然保持應用服務不中斷,係為本領域之重要議題之一。 Therefore, how to establish a mechanism for the local MEC equipment, the neighboring MEC equipment and the application server to route packets to each other, so as to cause the UE to handover between the base stations of the local MEC and the neighboring MEC when the user moves It is one of the important issues in this field to maintain uninterrupted application services.
為解決前述問題及其他問題,本發明提供一種用於行動邊緣運算設備之訊務繞送系統,包括:轉址控制模組,係用於執行轉址控制機制;位於本地端之第一轉址模組,係與該轉址控制模組通訊連接,以用於根據該轉址控制機制執行應用服務之第一轉址機制;以及位於本地端之應用伺服器,係與該第一轉址模組連接,以用於提供該應用服務。 In order to solve the aforementioned problems and other problems, the present invention provides a traffic routing system for mobile edge computing devices, including: a forwarding control module, which is used to implement a forwarding control mechanism; and a first forwarding address at the local end The module is in communication connection with the forwarding control module for executing the first forwarding mechanism of the application service according to the forwarding control mechanism; and the application server at the local end is connected to the first forwarding module Group connection to provide the application service.
在上述之訊務繞送系統中,復包括:位於本地端之第一行動邊緣運算設備,係與該第一轉址模組連接,以用於提供使用者終端存取該應用服務,其中,該應用服務包括:由該應用伺服器接收該第一行動邊緣運算設備上行之來自該使用者終端的上行封包;以及由該應用伺服器端傳送下行封包至該第一行動邊緣運算設備,進而傳送給該使用者終端。 In the above-mentioned traffic routing system, it further includes: a first mobile edge computing device located at the local end, which is connected to the first forwarding module to provide user terminals with access to the application service, wherein: The application service includes: receiving, by the application server, an uplink packet from the user terminal from the first mobile edge computing device; and sending a downlink packet from the application server to the first mobile edge computing device, and then sending To the user terminal.
在上述之訊務繞送系統中,該轉址控制機制包括:當該使用者終端在該第一行動邊緣運算設備之服務範圍內上線期間維持該第一轉址模組的第一轉址規則表中之轉址規則,其中,該轉址規則為不對含有該使用者終端之用戶IP之封包進行轉址;以及當該使用者終端離開該第一行動邊緣運算設備之該服務範圍時,將該第一轉址規則表中之該轉址規則刪除。 In the above-mentioned traffic routing system, the forwarding control mechanism includes: maintaining the first forwarding rule of the first forwarding module while the user terminal is online within the service range of the first mobile edge computing device The forwarding rule in the table, where the forwarding rule is not to forward the packet containing the user IP of the user terminal; and when the user terminal leaves the service range of the first mobile edge computing device, it will The forwarding rule in the first forwarding rule table is deleted.
在上述之訊務繞送系統中,該第一轉址機制包括:令該第一轉址模組將該上行封包根據該第一轉址規則在不進行轉址下傳送至該應用伺服器;以及令該第一轉址模組將該下行封包根據該轉址規則在不進行轉址下傳送至該第一行動邊緣運算設備。 In the above-mentioned traffic routing system, the first forwarding mechanism includes: enabling the first forwarding module to send the uplink packet to the application server without forwarding according to the first forwarding rule; And order the first forwarding module to transmit the downlink packet to the first mobile edge computing device without forwarding according to the forwarding rule.
在上述之訊務繞送系統中,復包括:位於鄰端之第二轉址模組,係與該轉址控制模組及該第一轉址模組通訊連接,以用於根據該轉 址控制機制執行該應用服務之第二轉址機制;以及位於鄰端之第二行動邊緣運算設備,係與該第二轉址模組連接,以用於提供使用者終端存取該應用服務,其中,該應用服務包括:由該應用伺服器接收該第二行動邊緣運算設備上行之來自該使用者終端的上行封包;以及由該應用伺服器端傳送下行封包至該第二行動邊緣運算設備,進而將該下行封包傳送給該使用者終端。 In the above-mentioned traffic routing system, the multiple includes: a second forwarding module at the neighboring end, which is in communication connection with the forwarding control module and the first forwarding module, and is used for according to the forwarding module. The address control mechanism executes the second forwarding mechanism of the application service; and the second mobile edge computing device at the neighboring terminal is connected to the second forwarding module for providing the user terminal to access the application service, Wherein, the application service includes: receiving, by the application server, an uplink packet from the user terminal from the second mobile edge computing device; and sending a downlink packet from the application server to the second mobile edge computing device, Then, the downlink packet is transmitted to the user terminal.
在上述之訊務繞送系統中,該轉址控制機制包括:令該轉址控制模組在該使用者終端於該第二行動邊緣運算設備之服務範圍內上線期間維持該第一轉址模組之第一轉址規則表中的第一轉址規則及該第二轉址模組之第二轉址規則表中的第二轉址規則;以及令該轉址控制模組在該使用者終端離開該第二行動邊緣運算設備之該服務範圍時刪除該第一轉址規則表之該第一轉址規則及該第二轉址規則表之該第二轉址規則。 In the above-mentioned traffic routing system, the forwarding control mechanism includes: enabling the forwarding control module to maintain the first forwarding mode while the user terminal is online within the service range of the second mobile edge computing device The first forwarding rule in the first forwarding rule table of the group and the second forwarding rule in the second forwarding rule table of the second forwarding module; and making the forwarding control module in the user When the terminal leaves the service range of the second mobile edge computing device, the first forwarding rule of the first forwarding rule table and the second forwarding rule of the second forwarding rule table are deleted.
在上述之訊務繞送系統中,該由該應用伺服器接收該第二行動邊緣運算設備上行之來自該使用者終端的上行封包之方式係包括下列步驟:令該第二轉址模組接收來自該第二行動邊緣運算設備之該上行封包,其中,該上行封包之來源IP為該使用者終端之用戶IP;令該第二轉址模組執行該第二轉址機制,將該上行封包之來源IP根據該第二轉址規則轉址為轉址IP後傳送至該第一轉址模組;以及令該第一轉址模組執行該第一轉址機制,將來自該第二轉址模組的該上行封包之來源IP根據該第一轉址規則轉址回該用戶IP後傳送至該應用伺服器。 In the above-mentioned traffic routing system, the method for the application server to receive the uplink packets from the user terminal from the second mobile edge computing device includes the following steps: making the second forwarding module receive The upstream packet from the second mobile edge computing device, wherein the source IP of the upstream packet is the user IP of the user terminal; the second forwarding module is made to execute the second forwarding mechanism, and the upstream packet The source IP is forwarded to the forwarded IP according to the second forwarding rule, and then sent to the first forwarding module; The source IP of the upstream packet of the address module is forwarded back to the user IP according to the first forwarding rule and then sent to the application server.
在上述之訊務繞送系統中,該由該應用伺服器端傳送下行封包至該第二行動邊緣運算設備,進而傳送給該使用者終端之方式係包括下列步驟:令該第一轉址模組接收來自該應用伺服器端之該下行封包,其中,該下行封包之目的IP為該使用者終端之用戶IP;令該第一轉址模組 執行該第一轉址機制,將該下行封包之目的IP根據該第一轉址規則轉址為轉址IP後傳送至該第二轉址模組;以及令該第二轉址模組執行該第二轉址機制,將來自該第一轉址模組的該下行封包之目的IP根據該第二轉址規則轉址回該用戶IP後傳送至該第二行動邊緣運算設備,進而將該下行封包傳送至該使用者終端。 In the above-mentioned traffic routing system, the method of sending downlink packets from the application server to the second mobile edge computing device and then to the user terminal includes the following steps: making the first forwarding module The group receives the downlink packet from the application server, where the destination IP of the downlink packet is the user IP of the user terminal; make the first forwarding module Execute the first forwarding mechanism, forward the destination IP of the downlink packet to a forwarded IP according to the first forwarding rule, and then send it to the second forwarding module; and make the second forwarding module execute the The second forwarding mechanism, which forwards the destination IP of the downlink packet from the first forwarding module back to the user IP according to the second forwarding rule, and then transmits it to the second mobile edge computing device, and then the downstream The packet is sent to the user terminal.
本發明復提供一種用於行動邊緣運算設備之訊務繞送方法,包括:令轉址控制模組根據使用者終端連線至本地端之應用伺服器之訊息執行轉址控制機制;令該應用伺服器提供應用服務;令本地端之第一轉址模組根據該轉址控制機制執行該應用服務於該應用伺服器及該使用者終端之間之第一轉址機制。 The present invention further provides a traffic routing method for mobile edge computing equipment, including: making the forwarding control module execute the forwarding control mechanism according to the information of the user terminal connected to the application server of the local end; making the application The server provides an application service; the first forwarding module at the local end executes the first forwarding mechanism of the application service between the application server and the user terminal according to the forwarding control mechanism.
在上述之訊務繞送方法中,該令轉址控制模組根據使用者終端連線至本地端之應用伺服器之訊息執行轉址控制機制之步驟係包括下列子步驟:令該轉址控制模組接收該使用者終端於本地端之第一行動邊緣運算設備之服務範圍內上線之訊息;以及令該轉址控制模組於該第一轉址模組的第一轉址規則表中新增關於該使用者終端之用戶IP的轉址規則,其中,該轉址規則為不進行轉址。 In the above-mentioned traffic routing method, the steps for the forwarding control module to execute the forwarding control mechanism according to the message of the user terminal connected to the application server of the local end include the following sub-steps: making the forwarding control The module receives the message that the user terminal goes online within the service range of the first mobile edge computing device at the local end; and makes the forwarding control module new in the first forwarding rule table of the first forwarding module Add a forwarding rule for the user IP of the user terminal, where the forwarding rule is no forwarding.
在上述之訊務繞送方法中,該轉址控制機制復包括下列子步驟:令該轉址控制模組接收該使用者終端離開該第一行動邊緣運算設備之該服務範圍之訊息;令該轉址控制模組將該第一轉址規則表之該轉址規則刪除。 In the above-mentioned traffic routing method, the forwarding control mechanism further includes the following sub-steps: making the forwarding control module receive a message that the user terminal leaves the service range of the first mobile edge computing device; The forwarding control module deletes the forwarding rule in the first forwarding rule table.
在上述之訊務繞送方法中,該令本地端之第一轉址模組根據該轉址控制機制執行該應用服務於該應用伺服器及該使用者終端之間之第一轉址機制之步驟係包括下列子步驟:令該第一轉址模組接收該第一行動邊緣運算設備上行之來自該使用者終端的上行封包,其中,該上行封包 之來源IP為該用戶IP;令該第一轉址模組查詢該第一轉址規則表中關於該使用者終端之用戶IP之該轉址規則;以及令該第一轉址模組根據該轉址規則在不進行轉址下將該上行封包傳送至該應用伺服器。 In the above-mentioned traffic routing method, the first forwarding module of the local end is caused to execute the first forwarding mechanism of the application service between the application server and the user terminal according to the forwarding control mechanism The step includes the following sub-steps: making the first forwarding module receive the uplink packet from the user terminal that the first mobile edge computing device uplinks, wherein the uplink packet The source IP is the user IP; order the first forwarding module to query the forwarding rule about the user IP of the user terminal in the first forwarding rule table; and make the first forwarding module according to the The forwarding rule sends the upstream packet to the application server without forwarding.
在上述之訊務繞送方法中,該令本地端之第一轉址模組根據該轉址控制機制執行該應用服務於該應用伺服器及該使用者終端之間之第一轉址機制之步驟係包括下列子步驟:令該第一轉址模組接收該應用伺服器端欲下行至該使用者終端的下行封包,其中,該下行封包之目的IP為該用戶IP;令該第一轉址模組查詢該第一轉址規則表中關於該使用者終端之用戶IP之該轉址規則;以及令該第一轉址模組根據該轉址規則在不進行轉址下將該下行封包傳送至該第一行動邊緣運算設備,進而將該下行封包傳送給該使用者終端。 In the above-mentioned traffic routing method, the first forwarding module of the local end is caused to execute the first forwarding mechanism of the application service between the application server and the user terminal according to the forwarding control mechanism The steps include the following sub-steps: enabling the first forwarding module to receive the downlink packet that the application server wants to download to the user terminal, wherein the destination IP of the downlink packet is the user IP; making the first forwarding module The address module queries the forwarding rule for the user IP of the user terminal in the first forwarding rule table; and instructs the first forwarding module to perform the downstream packet without forwarding according to the forwarding rule It is sent to the first mobile edge computing device, and then the downlink packet is sent to the user terminal.
在上述之訊務繞送方法中,該令轉址控制模組根據使用者終端連線至應用伺服器之訊息執行轉址控制機制之步驟係包括下列子步驟:令該轉址控制模組接收該使用者終端於鄰端之第二行動邊緣運算設備之服務範圍內上線之訊息;令該轉址控制模組於鄰端之第二轉址模組之第二轉址規則表中新增關於該使用者終端之用戶IP的第二轉址規則;以及令該轉址控制模組於本地端之該第一轉址模組之第一轉址規則表中新增關於該使用者終端之用戶IP的第一轉址規則。 In the above-mentioned traffic routing method, the step of making the forwarding control module execute the forwarding control mechanism according to the message that the user terminal connects to the application server includes the following sub-steps: making the forwarding control module receive The message that the user terminal goes online within the service range of the second mobile edge computing device at the neighboring end; make the forwarding control module add information about in the second forwarding rule table of the second forwarding module at the neighboring end The second forwarding rule of the user IP of the user terminal; and making the forwarding control module add the user about the user terminal to the first forwarding rule table of the first forwarding module of the local end The first forwarding rule of IP.
在上述之訊務繞送方法中,該轉址控制機制復包括下列子步驟:令該轉址控制模組接收該使用者終端離開該第二行動邊緣運算設備之該服務範圍之訊息;令該轉址控制模組將該第二轉址規則表之該第二轉址規則刪除;以及令該轉址控制模組將該第一轉址規則表之該第一轉址規則刪除。 In the above-mentioned traffic routing method, the forwarding control mechanism further includes the following sub-steps: making the forwarding control module receive a message that the user terminal leaves the service range of the second mobile edge computing device; The forwarding control module deletes the second forwarding rule of the second forwarding rule table; and ordering the forwarding control module to delete the first forwarding rule of the first forwarding rule table.
在上述之訊務繞送方法中,復包括:令鄰端之該第二轉址模組根據該轉址控制機制執行該應用服務於該應用伺服器及該使用者終端之間之第二轉址機制,係包括下列子步驟:令該第二轉址模組接收該第二行動邊緣運算設備上行之來自該使用者終端的上行封包,其中,該上行封包之來源IP為該用戶IP;令該第二轉址模組查詢該第二轉址規則表中關於該使用者終端之用戶IP之該第二轉址規則;以及令該第二轉址模組根據該第二轉址規則將該上行封包之來源IP轉址為轉址IP後傳送至本地端之該第一轉址模組。 In the above-mentioned traffic routing method, the multiple steps include: making the second forwarding module of the neighboring terminal execute the second forwarding of the application service between the application server and the user terminal according to the forwarding control mechanism The addressing mechanism includes the following sub-steps: making the second forwarding module receive the uplink packet from the user terminal that the second mobile edge computing device uplinks, wherein the source IP of the uplink packet is the user IP; The second forwarding module queries the second forwarding rule about the user IP of the user terminal in the second forwarding rule table; and instructs the second forwarding module to transfer the The source IP of the upstream packet is forwarded to the forwarded IP and then sent to the first forwarding module at the local end.
在上述之訊務繞送方法中,該令本地端之第一轉址模組根據該轉址控制機制執行該應用服務於該應用伺服器及該使用者終端之間之第一轉址機制之步驟係包括下列子步驟:令該第一轉址模組接收鄰端之該第二轉址模組上行之該上行封包,其中,該上行封包之來源IP為該轉址IP;令該第一轉址模組查詢該第一轉址規則表中關於該使用者終端之用戶IP之該第一轉址規則;以及令該第一轉址模組根據該第一轉址規則將該上行封包之來源IP由該轉址IP轉址回該用戶IP後傳送至該應用伺服器。 In the above-mentioned traffic routing method, the first forwarding module of the local end is caused to execute the first forwarding mechanism of the application service between the application server and the user terminal according to the forwarding control mechanism The steps include the following sub-steps: making the first forwarding module receive the upstream packet from the neighboring second forwarding module, wherein the source IP of the upstream packet is the forwarding IP; making the first The forwarding module queries the first forwarding rule about the user IP of the user terminal in the first forwarding rule table; and instructs the first forwarding module to packetize the uplink packet according to the first forwarding rule The source IP is forwarded from the forwarding IP back to the user IP and then sent to the application server.
在上述之訊務繞送方法中,該令本地端之第一轉址模組根據該轉址控制機制執行該應用服務於該應用伺服器及該使用者終端之間之第一轉址機制之步驟係包括下列子步驟:令該第一轉址模組接收本地端之該應用伺服器端欲下行至該使用者終端的下行封包,其中該下行封包之目的IP為該用戶IP;令該第一轉址模組查詢該第一轉址規則表之關於該使用者終端之用戶IP之該第一轉址規則;以及令該第一轉址模組根據該第一轉址規則將該封包之目的IP轉址為該轉址IP並傳送至鄰端之該第二轉址模組。 In the above-mentioned traffic routing method, the first forwarding module of the local end is caused to execute the first forwarding mechanism of the application service between the application server and the user terminal according to the forwarding control mechanism The steps include the following sub-steps: make the first forwarding module receive the downlink packet that the application server of the local end wants to download to the user terminal, wherein the destination IP of the downlink packet is the user IP; A forwarding module queries the first forwarding rule about the user IP of the user terminal in the first forwarding rule table; The destination IP forwarding is the forwarding IP and sent to the second forwarding module of the neighbor.
在上述之訊務繞送方法中,復包括:令鄰端之該第二轉址模組根據該轉址控制機制執行該應用服務於該應用伺服器及該使用者終端之間之第二轉址機制,係包括下列子步驟:令該第二轉址模組接收本地端之該第一轉址模組下行之該下行封包,其中,該下行封包之目的IP為該轉址IP;令該第二轉址模組查詢該第二轉址規則表中關於該使用者終端之用戶IP之該第二轉址規則;以及令該第二轉址模組根據該第二轉址規則將該下行封包之目的IP由該轉址IP轉址回該用戶IP後傳送至該第二行動邊緣運算裝置,進而將該下行封包傳送給該使用者終端。 In the above-mentioned traffic routing method, the multiple steps include: making the second forwarding module of the neighboring terminal execute the second forwarding of the application service between the application server and the user terminal according to the forwarding control mechanism The addressing mechanism includes the following sub-steps: enabling the second forwarding module to receive the downstream packet from the first forwarding module at the local end, wherein the destination IP of the downstream packet is the forwarding IP; The second forwarding module queries the second forwarding rule about the user IP of the user terminal in the second forwarding rule table; and instructs the second forwarding module to download the data according to the second forwarding rule The destination IP of the packet is forwarded from the forwarding IP back to the user IP and then sent to the second mobile edge computing device, and then the downstream packet is sent to the user terminal.
綜上所述,本發明之用於行動邊緣運算設備之訊務繞送系統及方法係建立本地端及鄰端之MEC設備與應用伺服器之間的完整封包繞送機制,於MEC設備與應用伺服器之間設置轉址模組,並透過轉址控制模組維護轉址規則,使得本地端MEC設備與應用伺服器互相傳送的封包時可依轉址規則直接路由至目的,而鄰端MEC設備與應用伺服器互相傳送的封包係經轉址後再傳送,並且考慮使用者終端的移動性隨時更新轉址規則。因此使用者終端透過MEC設備與應用伺服器互相傳送封包時,封包無論在何種狀況下皆能找到正確之傳送路徑而維持服務不中斷,故能提升使用者的上網品質與效率。 In summary, the traffic routing system and method for mobile edge computing devices of the present invention establishes a complete packet routing mechanism between the MEC device and the application server at the local end and the neighboring end. Set up a forwarding module between servers, and maintain forwarding rules through the forwarding control module, so that the packets sent between the local MEC device and the application server can be directly routed to the destination according to the forwarding rules, and the neighboring MEC The packets sent between the device and the application server are forwarded and then forwarded, and the forwarding rules are updated at any time in consideration of the mobility of the user terminal. Therefore, when the user terminal transmits packets to each other through the MEC equipment and the application server, the packets can find the correct transmission path under any conditions and maintain uninterrupted services, thus improving the user's Internet quality and efficiency.
100‧‧‧使用者終端、UE 100‧‧‧User terminal, UE
101‧‧‧本地端 101‧‧‧Local
102‧‧‧鄰端 102‧‧‧Neighboring
111‧‧‧MEC1 111‧‧‧MEC1
112‧‧‧MEC2 112‧‧‧MEC2
113‧‧‧MEC3 113‧‧‧MEC3
120‧‧‧應用伺服器、APP伺服器 120‧‧‧Application server, APP server
200‧‧‧轉址控制模組、SDN控制器 200‧‧‧Redirection control module, SDN controller
201~203‧‧‧轉址模組、SDN交換器 201~203‧‧‧Redirection module, SDN switch
211‧‧‧MEC1 211‧‧‧MEC1
212‧‧‧MEC2 212‧‧‧MEC2
213‧‧‧MEC3 213‧‧‧MEC3
220‧‧‧應用伺服器、APP伺服器 220‧‧‧Application server, APP server
S301~S305‧‧‧步驟 S301~S305‧‧‧Step
S401~S405‧‧‧步驟 S401~S405‧‧‧Step
S501~S508‧‧‧步驟 S501~S508‧‧‧Step
S601~S605‧‧‧步驟 S601~S605‧‧‧Step
S701~S704‧‧‧步驟 S701~S704‧‧‧Step
S801~S804‧‧‧步驟 S801~S804‧‧‧Step
S1~S15‧‧‧步驟 S1~S15‧‧‧Step
第1圖係揭示習知使用MEC設備之行動網路系統之系統架構圖; Figure 1 shows the system architecture diagram of the conventional mobile network system using MEC equipment;
第2圖係揭示本發明之用於MEC設備之訊務繞送系統之系統架構圖; Figure 2 shows the system architecture diagram of the traffic routing system for MEC equipment of the present invention;
第3圖係揭示本發明之用於MEC設備之訊務繞送方法之局部步驟流程圖; Figure 3 is a flow chart showing the partial steps of the traffic routing method for MEC equipment of the present invention;
第4圖係揭示本發明之用於MEC設備之訊務繞送方法之局部步驟流程圖; Figure 4 is a flow chart showing the partial steps of the traffic routing method for MEC equipment of the present invention;
第5圖係揭示本發明之用於MEC設備之訊務繞送方法之局部步驟流程圖; Figure 5 is a flow chart showing the partial steps of the traffic routing method for MEC equipment of the present invention;
第6圖係揭示本發明之用於MEC設備之訊務繞送方法之局部步驟流程圖; Figure 6 is a flow chart showing the partial steps of the traffic routing method for MEC equipment of the present invention;
第7圖係揭示本發明之用於MEC設備之訊務繞送方法之局部步驟流程圖; Figure 7 is a flow chart showing the partial steps of the traffic routing method for MEC equipment of the present invention;
第8圖係揭示本發明之用於MEC設備之訊務繞送方法之局部步驟流程圖; Figure 8 is a flow chart showing the partial steps of the traffic routing method for MEC equipment of the present invention;
第9圖係揭示本發明之用於MEC設備之訊務繞送系統及方法之實施態樣圖;以及 Figure 9 is a schematic diagram of the implementation of the traffic routing system and method for MEC equipment of the present invention; and
第10圖係揭示本發明之用於MEC設備之訊務繞送系統及方法之實施態樣圖。 FIG. 10 is a diagram showing the implementation aspect of the traffic routing system and method for MEC equipment of the present invention.
以下藉由特定的實施例說明本案之實施方式,熟習此項技藝之人士可由本文所揭示之內容輕易地瞭解本案之其他優點及功效。本說明 書所附圖式所繪示之結構、比例、大小等均僅用於配合說明書所揭示之內容,以供熟悉此技藝之人士之瞭解與閱讀,非用於限定本案可實施之限定條件,故任何修飾、改變或調整,在不影響本案所能產生之功效及所能達成之目的下,均應仍落在本案所揭示之技術內容得能涵蓋之範圍內。 The following specific examples are used to illustrate the implementation of this case. Those who are familiar with this technique can easily understand the other advantages and effects of this case from the content disclosed in this article. This note The structure, proportion, size, etc. shown in the drawings in the book are only used to match the contents disclosed in the manual for the understanding and reading of those who are familiar with the art. They are not used to limit the conditions that can be implemented in this case. Any modification, change or adjustment shall still fall within the scope of the technical content disclosed in this case without affecting the effects and objectives that can be achieved in this case.
本發明之使用行動邊緣運算(MEC)設備之訊務繞送系統係如第2圖所示,其中,本地端101之MEC設備(即,MEC1 211)係與應用伺服器220共用一轉址模組201、且鄰端102的複數個MEC設備(亦即,MEC2 212及MEC3 213)後方皆設有轉址模組(例如,轉址模組202及203),並由位於遠端或雲端之轉址控制模組200管理各轉址模組。在此配置下,藉由轉址控制模組200執行關於一使用者終端(UE)之轉址控制機制及各轉址模組(轉址模組201、202及203)執行對應之轉址機制,使得UE在使用應用伺服器220(APP伺服器,此時係透過轉址模組201與MEC1 211連接)之應用服務時,即便因使用者移動而造成UE需在本地端101及鄰端102之MEC設備的基地台(eNB1、eNB2、eNB3)服務範圍間交遞(handover),封包仍可以正確之路徑在UE及應用伺服器間上下行,達到應用服務不中斷的效果。
The traffic routing system using mobile edge computing (MEC) equipment of the present invention is shown in Figure 2, where the MEC equipment at the local end 101 (ie, MEC1 211) shares a forwarding mode with the
在一實施例中,例如本發明之訊務繞送系統的應用伺服器220係為用於直播演唱會現場的伺服器,則UE可在本地端101的MEC1 211服務範圍內享用低延遲(例如,零秒延遲)的直播服務。然而,當使用者在演唱會直播期間需移動至鄰端102時(例如,移動到MEC2 212或MEC3 213服務範圍內),為使演唱會之直播服務不中斷,可透過本地端101之轉址模組201及鄰端102之轉址模組202或203將在應用伺服器220
及UE之間傳遞的封包進行轉址後找到正確之路徑傳送,使得UE在交遞至鄰端102 MEC設備之服務範圍時不須重新與應用伺服器220建立連線且能不中斷地享用演唱會直播的服務。
In one embodiment, for example, the
以下係以第3至8圖之步驟流程圖說明本發明之轉址控制模組200及各轉址模組201、202及203間的轉址控制機制及封包之轉址機制之執行方式。
The following is a step-by-step flowchart in Figures 3 to 8 to illustrate the implementation of the forwarding control mechanism between the forwarding
第3至4圖係分別揭示本發明之轉址控制模組200之用戶上線及用戶下線之轉址控制機制。
Figures 3 to 4 respectively show the forwarding control mechanism of the user on-line and user off-line of the forwarding
請先參考第3圖,當UE透過基地台連線至MEC設備(例如,MEC1 211、MEC2 212或MEC3 213之任一者)時,MEC設備會取得UE之用戶IP並通知轉址控制模組200 UE上線之訊息以開始用戶上線之轉址控制機制。
Please refer to Figure 3 first, when the UE connects to the MEC device (for example, any one of
此時,轉址控制模組200會於步驟S301及S303處判斷UE是在本地端101還是鄰端102上線。當步驟S301判定UE是在本地端101上線(即,UE在MEC1 211之基地台eNB1之服務範圍內連線)的情況下,轉址控制模組200會將關於UE之用戶IP之轉址規則新增至本地端101的轉址模組201的轉址規則表中。此時,轉址控制模組200分配至轉址模組201的關於用戶IP的轉址規則不會規定對來自MEC1 211或應用伺服器220的封包進行轉址,故在MEC1 211及應用伺服器220之間上下行的封包可直接藉由轉址模組201路由至目的。
At this time, the forwarding
另一方面,當步驟S303判斷UE是在鄰端102上線(即,UE在MEC2 212或MEC3 213之基地台eNB2或eNB3之服務範圍內連
線)的情況下,轉址控制模組200係執行步驟S304分配一組包括用戶IP(亦可記為UE IP)及對應於用戶IP之轉址IP的轉址規則於鄰端之轉址模組202或203的轉址規則表中,其係規定封包在上行時須將其來源IP(SrcIP)由原本之用戶IP轉為轉址IP,並且當封包下行時須將其目的IP(DstIP)由轉址IP轉回用戶IP。接著執行步驟S305,將對應前述S304建立之轉址規則的相應轉址規則新增至本地端101之轉址模組201的轉址規則表中,其係規定當封包上行時須將其來源IP由轉址IP轉回用戶IP,並且當封包下行時將其目的IP由原本之用戶IP轉為轉址IP。藉由上述建立之轉址規則,當UE在鄰端102透過MEC設備(例如,MEC2 212或MEC3 213)使用應用伺服器220之應用服務時,係可先於鄰端102 MEC設備對應之轉址模組202或203及本地端101之轉址模組201處藉由執行封包之轉址機制以確認存在封包之正確傳送路徑後再進行傳送。
On the other hand, when it is determined in step S303 that the UE is online at the neighbor 102 (that is, the UE is connected within the service range of the base station eNB2 or eNB3 of the
請接續參考第4圖,當UE離開MEC設備(例如,MEC1 211、MEC2 212或MEC3 213之任一者)之基地台服務範圍時,MEC設備即判定UE已交遞至其他基地台服務範圍或停止使用應用服務,並傳送用戶下線之通知給轉址控制模組200以開始用戶下線之轉址控制機制。
Please continue to refer to Figure 4. When the UE leaves the service area of the base station of the MEC equipment (for example,
在步驟S401及S403處,轉址控制模組200係分別判斷UE是在本地端101還是鄰端102下線。當步驟S401判定UE是在本地端101下線時(即,UE已離開MEC1 211之基地台eNB1之服務範圍),轉址控制模組200係執行步驟S402將關於用戶IP之轉址規則自本地端101之轉址模組201的轉址規則表中刪除。
In steps S401 and S403, the forwarding
另一方面,當步驟S403判定UE是在鄰端102下線時(即,UE已離開MEC2 212或MEC3 213之基地台eNB1或eNB2之服務範圍),轉址控制模組200係執行步驟S404將鄰端102之轉址模組202或203之關於用戶IP之轉址規則自轉址規則表中刪除,接著執行步驟S405將相應之轉址規則自本地端101之轉址模組201的轉址規則表中刪除。
On the other hand, when it is determined in step S403 that the UE is offline at the neighbor 102 (that is, the UE has left the service range of the base station eNB1 or eNB2 of the
第5至6圖係分別揭示本地端101之轉址模組201執行封包之上行(即,將封包傳送至應用伺服器220)與下行(即,接收來自應用伺服器220之封包)之轉址機制的步驟流程圖。
Figures 5 to 6 respectively show that the
請參考第5圖,本地端101之轉址模組201在進行封包之上行時,係分別執行步驟S501及S504判斷封包是來自本地端101之MEC設備(例如,MEC1 211)還是IP網路(亦及,封包可能來自鄰端102之MEC設備MEC2 212或MEC3 213)。若封包是來自本地端101之MEC1 211,則轉址模組201係於步驟S502判斷關於封包之來源IP(此時可能為UE之用戶IP)的轉址規則(例如,第3圖步驟S302建立之不執行轉址機制的轉址規則)是否存在於轉址模組201的轉址規則表中。是的情況下,轉址模組201係執行步驟S503及S508,依照轉址規則在不進行轉址下將封包直接路由至應用伺服器220。
Please refer to Fig. 5, when the
當步驟S504判斷轉址模組201收到之封包是來自IP網路時,轉址模組201係於步驟S505判斷關於封包之來源IP(此時可能為一轉址IP)的轉址規則(例如,第3圖步驟S305建立之轉址規則)是否存在於轉址模組201之轉址規則表中。否的情況下係執行步驟S507將此封包丟棄。是的情況下,則執行步驟S506,依照轉址規則將封包之來源IP由
轉址IP轉回用戶IP,並進一步執行步驟S508將封包傳至應用伺服器220。
When it is determined in step S504 that the packet received by the
請接續參考第6圖,本地端101之轉址模組201在進行封包下行時,轉址模組201係先於步驟S601確認收到之封包是來自應用伺服器220之封包,接著執行步驟S602查詢關於封包之目的IP(此時可能為用戶IP)的轉址規則是否存在於轉址模組201的轉址規則表中。是的情況下,轉址模組201係執行步驟S603,根據轉址規則以將封包之目的IP由原本的用戶IP轉為轉址IP、或是不進行目的IP之轉址(亦及,轉址規則係指示封包將下行至鄰端之MEC設備或是至本地端之MEC設備),並執行步驟S604將封包傳送至目的IP指示的位址。
Please continue to refer to Figure 6. When the
第7至8圖係揭示鄰端102之MEC設備(MEC2 212或MEC3 213)之轉址模組202或203執行封包之上行(即,將封包傳送至IP網路)與下行(即,接收來自IP網路之封包)之轉址機制的步驟流程圖。
Figures 7 to 8 show that the
請參考第7圖,鄰端102之轉址模組202或203在執行封包上行之轉址機制時,係先於步驟S701確認是否收到來自MEC設備的封包(即,由轉址模組202或203對應之MEC2 212或MEC3 213發送之封包)。接著執行步驟S702,判斷關於封包的來源IP(此時可能為UE之用戶IP)的轉址規則是否存在於轉址模組202或203的轉址規則表中。是的情況下,係執行步驟S703,根據轉址規則將封包的來源IP由原本的用戶IP轉為轉址IP,並在步驟S704將封包傳送至IP網路。
Please refer to Figure 7. When the
請接續參考第8圖,鄰端102之轉址模組202或203在執行封包下行之轉址機制時,係先於步驟S801處確認是否收到來自IP網路
的封包。接著於步驟S802判斷關於封包之目的IP(此時可能為一轉址IP)的轉址規則是否存在於轉址模組202或203的轉址規則表中。是的情況下,則執行步驟S803將封包之目的IP由轉址IP轉回用戶IP,並執行步驟S804根據目的IP將封包傳送至對應之MEC設備(即,MEC2 212或MEC3 213)。
Please continue to refer to Figure 8. When the
由上述可知,藉由第3圖及第4圖之轉址控制機制,轉址控制模組200分配之關於UE之用戶IP的轉址規則僅適用於UE於某一MEC設備服務範圍內連線期間。另外,藉由第5至8圖的轉址機制,封包僅會在轉址模組201、202或203確定存在其IP資訊對應之轉址規則時才進行封包之轉址或不轉址與傳送,故能達到封包在UE上線期間皆能找到正確路徑於UE及應用伺服器220間上下行,而不會中斷應用服務的效果。
It can be seen from the above that with the forwarding control mechanism in Figures 3 and 4, the forwarding rules for the UE's user IP allocated by the forwarding
第9至10圖係揭示本發明之使用行動邊緣運算(MEC)設備之訊務繞送系統的實施態樣圖。其中,本發明之實施例係將轉址模組201、202及203以軟體定義網路(software-defined networking,SDN)交換器實現(例如,第9至10圖所示SDN交換器1 201、SDN交換器2 202及SDN交換器3 203),並且轉址控制模組200係以SDN控制器實現。其中,第9圖係揭示使用者終端(UE)100在本地端101使用應用伺服器220之應用服務後交遞至鄰端102的轉址控制機制與轉址機制的實作態樣,而第10圖係揭示UE 100完成交遞至鄰端102後之轉址控制機制及轉址機制的實作態樣。並且其中,步驟S1至S15係用於說明封包在傳送及轉址期間IP資訊的變化。
Figures 9 to 10 are diagrams showing implementation aspects of the traffic routing system using mobile edge computing (MEC) equipment of the present invention. Among them, the embodiment of the present invention implements the forwarding
現請參考第9圖,假設UE 100(其用戶IP例如為140.1.1.1)原先在本地端101透過MEC1 211使用應用伺服器220(其IP例如為1.1.1.2)的應用服務。在這個情況下,當UE 100於基地台(eNB1)服務範圍內上線時,UE 100係於步驟S1透過基地台(eNB1)傳送一封包給MEC1 211,此時封包的IP資訊例如為“SrcIP:140.1.1.1;DstIP:1.1.1.2”。MEC1 211係於步驟S2將UE 100上線之訊息通知SDN控制器200並將封包送至SDN交換器1 201,SDN控制器200係透過如第3圖所示之用戶上線的轉址控制機制判斷UE 100是否在本地端101上線,以分配一關於用戶IP的不執行轉址的轉址規則至SDN交換器1 201(如第9圖之SDN交換器1規則表新增之規則)。SDN交換器1 201在步驟S3確認其轉址規則表中存在關於來源IP(即用戶IP)的轉址規則後,依據轉址規則不執行轉址而將封包直接路由至應用伺服器220。
Now referring to Figure 9, suppose that the UE 100 (its user IP is for example 140.1.1.1) originally used the application service of the application server 220 (its IP is for example 1.1.1.2) at the
接續於步驟S4,當應用伺服器220欲將封包下行至UE 100時,應用伺服器220係傳送一IP資訊為“SrcIP:1.1.1.2;DstIP:140.1.1.1”的封包至SDN交換器1 201,SDN交換器1 201係於步驟S5確認其轉址規則表中關於DstIP(即用戶IP)的轉址規則為不進行轉址,以將封包在不進行轉址下直接路由至MEC1 211,MEC1 211係於步驟S6傳送封包至其基地台(eNB1),並進而發送給UE 100。此外,在上述步驟S1至S6期間,若使用者移動而造成UE 100移動至其他MEC服務範圍(例如,步驟S7所示UE 100移動至鄰端102之MEC2 212的基地台(eNB2)服務範圍內)時,MEC1 211會通知SDN控制器200 UE 100下線之訊息,
SDN控制器200係通知SDN交換器1 201將關於UE 100之用戶IP的轉址規則刪除,以利後續UE 100透過MEC2 212上線時建立新的轉址規則。
Following step S4, when the
請接續參考第10圖,當UE 100交遞至鄰端102之MEC2 212後,MEC2 212係於步驟S8接收UE 100透過基地台(eNB2)傳送之封包(其IP資訊例如為“SrcIP:140.1.1.1;DstIP:1.1.1.2”)後,於步驟S9通知SDN控制器200 UE 100上線之訊息,此時,SDN控制器200係執行如第3圖所示之用戶上線的轉址控制機制以判斷UE 100是否在鄰端102上線,以分配關於UE 100之用戶IP及轉址IP(例如,20.2.2.2)的轉址規則至SDN交換器2 202及SDN交換器1 201的轉址規則表中(如第10圖所示之SDN交換器1規則表及SDN交換器2規則表新增之規則)。SDN交換器2 202係於步驟S10查詢其轉址規則表中關於用戶IP的轉址規則,依據轉址規則(例如,SDN交換器2規則表之第一條規則所述之動作)將來自MEC2 212之封包的來源IP由原本之用戶IP轉址為轉址IP(此時第一次轉址後封包之IP資訊例如為“SrcIP:20.2.2.2;DstIP:1.1.1.2”),並透過IP網路送往SDN交換器1 201。SDN交換器1 201接收到封包後係於步驟S11查詢其轉址規則表之轉址規則(例如,SDN交換器1規則表之第一條規則所述之動作)以將封包之來源IP由轉址IP轉回用戶IP(此時第二次轉址後封包之IP資訊例如為“SrcIP:140.1.1.1;DstIP:1.1.1.2”)並傳送給應用伺服器220。
Please continue to refer to Figure 10. After the
相似地,當應用伺服器220於欲將封包下行至UE 100時,係於步驟S12傳送一IP資訊為“SrcIP:1.1.1.2;DstIP:140.1.1.1”的封包至SDN交換器1 201。SDN交換器1 201係於步驟S13查找其轉址規則
表中關於目的IP的轉址規則(例如,SDN交換器1規則表之第二條規則所述之動作),以將封包之目的IP由原本之用戶IP轉址為轉址IP(此時第一次轉址後封包之IP資訊例如為“SrcIP:1.1.1.2;DstIP:20.2.2.2”),並透過IP網路送往SDN交換器2 202。SDN交換器2 202接收封包後係於步驟S14查找其轉址規則表中關於目的IP的轉址規則(例如,SDN交換器2規則表之第二條規則所述之動作),以將封包之目的IP由轉址IP轉回用戶IP(此時第二次轉址後封包之IP資訊例如為“SrcIP:1.1.1.2;DstIP:140.1.1.1”)並傳送給MEC2 212。MEC2 212係於步驟S15將封包透過基地台(eNB2)發送給UE 100。
Similarly, when the
綜上所述,本發明係建立本地端及鄰端之MEC設備與應用伺服器之間的完整封包繞送機制,於MEC設備與應用伺服器之間設置轉址模組,並透過轉址控制模組維護轉址規則,使得本地端MEC設備與應用伺服器互相傳送的封包時可依轉址規則直接路由至目的,而鄰端MEC設備與應用伺服器互相傳送的封包係經轉址後再傳送,並且考慮使用者終端的移動性隨時更新轉址規則。因此,使用者終端透過MEC設備與應用伺服器互相傳送封包時,封包無論在何種狀況下皆能找到正確之傳送路徑而維持服務不中斷,故能提升使用者的上網品質與效率。 In summary, the present invention establishes a complete packet routing mechanism between the MEC equipment at the local and neighboring ends and the application server, and sets up a forwarding module between the MEC equipment and the application server, and controls it through forwarding The module maintains forwarding rules, so that the packets sent between the local MEC device and the application server can be directly routed to the destination according to the forwarding rules, and the packets sent between the neighboring MEC device and the application server are forwarded after being forwarded. Send, and update the forwarding rules at any time considering the mobility of the user terminal. Therefore, when the user terminal transmits packets to each other through the MEC device and the application server, the packets can find the correct transmission path under any conditions and maintain uninterrupted services, thus improving the user's Internet quality and efficiency.
上述實施例僅例示性說明本案之功效,而非用於限制本案,任何熟習此項技藝之人士均可在不違背本案之精神及範疇下對上述該些實施態樣進行修飾與改變。因此本案之權利保護範圍,應如後述之申請專利範圍所列。 The above-mentioned embodiments are only illustrative of the effects of the present case, and are not used to limit the present case. Anyone familiar with this technique can modify and change the above-mentioned implementation aspects without departing from the spirit and scope of the present case. Therefore, the scope of protection of the rights in this case should be listed in the scope of patent application described later.
101‧‧‧本地端 101‧‧‧Local
102‧‧‧鄰端 102‧‧‧Neighboring
200‧‧‧轉址控制模組 200‧‧‧Redirection Control Module
201~203‧‧‧轉址模組 201~203‧‧‧Redirection Module
211‧‧‧MEC1 211‧‧‧MEC1
212‧‧‧MEC2 212‧‧‧MEC2
213‧‧‧MEC3 213‧‧‧MEC3
220‧‧‧應用伺服器、APP伺服器 220‧‧‧Application server, APP server
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