# Patent

## Title
Content delivery reconciliation

## Abstract

A system and method for management and processing of resource requests are provided. A content delivery network service provider receives a DNS query from a client computing device corresponding to a requested resource from the client computing device. The content delivery network service provider associates the requested content into a set of content segments. For each content segment, the content delivery network service provider identifies the network address of a registered content provider, such as peer computing device, and a cache component of the content delivery service provider. The content delivery network service provider also provides tokens for requesting the content from a registered content provider. The client computing device obtains the content from the registered content providers and/or the cache component of the content delivery network service provider. Thereafter, the content delivery network service provider reconciles with the registered content providers for content provided to client computing devices.

## Background
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a divisional of U.S. patent application Ser. No. 12/060,143 entitled “INCENTIVE DRIVEN CONTENT DELIVERY” and filed Mar. 31, 2008, the disclosure of which is incorporated herein by reference.


BACKGROUND
Generally described, computing devices and communication networks can be utilized to exchange information. In a common application, a computing device can request content from another computing device via the communication network. For example, a user at a personal computing device can utilize a software browser application to request a Web page from a server computing device via the Internet. In such embodiments, the user computing device can be referred to as a client computing device and the server computing device can be referred to as a content provider.
Content providers are generally motivated to provide requested content to client computing devices often with consideration of efficient transmission of the requested content to the client computing device and/or consideration of a cost associated with the transmission of the content. For larger scale implementations, a content provider may receive content requests from a high volume of client computing devices which can place a strain on the content provider's computing resources. Additionally, the content requested by the client computing devices may have a number of components, which can further place additional strain on the content provider's computing resources.
With reference to an illustrative example, a requested Web page, or original content, may be associated with a number of additional resources, such as images or videos, that are to be displayed with the Web page. In one specific embodiment, the additional resources of the Web page are identified by a number of embedded resource identifiers, such as uniform resource locators (“URLs”). In turn, software on the client computing devices typically processes embedded resource identifiers to generate requests for the content. Often, the resource identifiers associated with the embedded resources reference a computing device associated with the content provider such that the client computing device would transmit the request for the additional resources to the referenced content provider computing device. Accordingly, in order to satisfy a content request, the content provider would provide client computing devices data associated with the Web page as well as the data associated with the embedded resources.
Some content providers attempt to facilitate the delivery of requested content, such as Web pages and/or resources identified in Web pages, through the utilization of a content delivery network (“CDN”) service provider. A CDN server provider typically maintains a number of computing devices in a communication network that can maintain content from various content providers. In turn, content providers can instruct, or otherwise suggest to, client computing devices to request some, or all, of the content provider's content from the CDN service provider's computing devices.
As with content providers, CDN service providers are also generally motivated to provide requested content to client computing devices often with consideration of efficient transmission of the requested content to the client computing device and/or consideration of a cost associated with the transmission of the content. Accordingly, CDN service providers often consider factors such as latency of delivery of requested content in order to meet service level agreements or to generally improve the quality of delivery service.



DESCRIPTION OF THE DRAWINGS
The foregoing aspects and many of the attendant advantages of this invention will become more readily appreciated as the same become better understood by reference to the following detailed description, when taken in conjunction with the accompanying drawings, wherein:
FIG. 1 is a block diagram illustrative of content delivery environment including a number of client computing devices, content provider, various third party content providers, and a content delivery network service provider;
FIG. 2 is a block diagram of the content delivery environment of FIG. 1 illustrating the registration of third party content provider with a content delivery service provider;
FIG. 3 is a block diagram of the content delivery environment of FIG. 1 illustrating the generation and processing of a content request from a client computing device to a content provider;
FIG. 4 is a block diagram of the content delivery environment of FIG. 1 illustrating one embodiment of the generation and processing of a DNS query corresponding to an embedded resource from a client computing device to a content delivery network service provider;
FIGS. 5A and 5B are block diagrams of the content delivery environment of FIG. 1 illustrating the generation and processing of embedded resource requests from a client computing device to the third party content providers and/or content delivery service provider cache components;
FIG. 6 is a block diagram of the content delivery environment of FIG. 1 illustrating the reconciliation for content provided to client computing devices by a third party content provider;
FIG. 7 is a flow diagram illustrative of a resource request processing routine implemented by a content delivery network service provider; and
FIG. 8 is a flow diagram illustrative a resource request processing routine implemented by a client computing device for obtaining requested content from third party content providers and/or a content delivery service provider.



DETAILED DESCRIPTION
Generally described, the present disclosure is directed to the management and processing of resource requests made to a content delivery network (“CDN”) service provider from client computing devices. Specifically, aspects of the disclosure will be described with regard to the utilization, by the CDN provider, of additional registered computing devices to provide requested content to the computing devices. As client computing device content requested are processed, the CDN provider provides an identification of registered computing devices that are capable of providing the requested content (or portions thereof) and a token for use in requesting content from the registered content providers. The client computing devices can then request the content (or content portions) from the registered content providers. Alternatively, the client computing device can request the content (or content portions) from a cache component of the CDN provider. The registered content providers can then utilize received tokens to reconcile with the CDN provider. Although various aspects of the disclosure will be described with regard to illustrative examples and embodiments, one skilled in the art will appreciate that the disclosed embodiments and examples should not be construed as limiting.
FIG. 1 is a block diagram illustrative of content delivery environment 100 for the management and processing of content requests. As illustrated in FIG. 1, the content delivery environment 100 includes a number of client computing devices 102 (generally referred to as clients) for requesting content from a content provider and/or a CDN service provider. In an illustrative embodiment, the client computing devices 102 can correspond to a wide variety of computing devices including personal computing devices, laptop computing devices, hand-held computing devices, terminal computing devices, mobile devices, wireless devices, various electronic devices and appliances and the like. In an illustrative embodiment, the client computing devices 102 include necessary hardware and software components for establishing communications over a communication network 108, such as a wide area network or local area network. For example, the client computing devices 102 may be equipped with networking equipment and browser software applications that facilitate communications via the Internet or an intranet.
Although not illustrated in FIG. 1, each client computing device 102 utilizes some type of local DNS resolver component, such as a DNS Name server, that generates the DNS queries attributed to the client computing device. In one embodiment, the local DNS resolver component may be provided by an enterprise network to which the client computing device 102 belongs. In another embodiment, the local DNS resolver component may be provided by an Internet Service Provider (ISP) that provides the communication network connection to the client computing device 102.
The content delivery environment 100 can also include a content provider 104 in communication with the one or more client computing devices 102 via the communication network 108. The content provider 104 illustrated in FIG. 1 corresponds to a logical association of one or more computing devices associated with a content provider. Specifically, the content provider 104 can include a web server component 110 corresponding to one or more server computing devices for obtaining and processing requests for content (such as Web pages) from the client computing devices 102. The content provider 104 can further include an origin server component 112 and associated storage component 114 corresponding to one or more computing devices for obtaining and processing requests for network resources from the CDN service provider. One skilled in the relevant art will appreciate that the content provider 104 can be associated with various additional computing resources, such additional computing devices for administration of content and resources, DNS name servers, and the like. For example, although not illustrated in FIG. 1, the content provider 104 can be associated with one or more DNS name server components that would be authoritative to resolve client computing device DNS queries corresponding to a domain of the content provider.
With continued reference to FIG. 1, the content delivery environment 100 can further include a CDN service provider 106 in communication with the one or more client computing devices 102 and the content providers 104 via the communication network 108. The CDN service provider 106 illustrated in FIG. 1 corresponds to a logical association of one or more computing devices associated with a CDN service provider. Specifically, the CDN service provider 106 can include a number of Point of Presence (“POP”) locations 116, 122, 128 that correspond to nodes on the communication network 108. Each POP 116, 122, 128 includes a DNS component 118, 124, 130 made up of a number of DNS server computing devices for resolving DNS queries from the client computers 102. Each POP 116, 122, 128 also includes a resource cache component 120, 126, 132 made up of a number of cache server computing devices for storing resources from content providers and transmitting various requested resources to various client computers. The DNS components 118, 124, and 130 and the resource cache components 120, 126, 132 may further include additional software and/or hardware components that facilitate communications including, but not limited, load balancing or load sharing software/hardware components.
In an illustrative embodiment, the DNS component 118, 124, 130 and resource cache component 120, 126, 132 are considered to be logically grouped, regardless of whether the components, or portions of the components, are physically separate. Additionally, although the POPs 116, 122, 128 are illustrated in FIG. 1 as logically associated with the CDN service provider 106, the POPs will be geographically distributed throughout the communication network 108 in a manner to best serve various demographics of client computing devices 102. Additionally, one skilled in the relevant art will appreciate that the CDN service provider 106 can be associated with various additional computing resources, such additional computing devices for administration of content and resources, and the like.
With continued reference to FIG. 1, the content delivery environment 100 can further include a number of third party content providers 134 that are registered with the CDN service provider 106. The CDN service provider 106 can utilize the third party content providers 134 to provide content, or content portions, as peer computing devices to requesting client computing devices 102 as will be described in greater detail below. The third party content providers 134 can correspond to a wide variety of computing devices including personal computing devices, laptop computing devices, hand-held computing devices, terminal computing devices, mobile devices, wireless devices, various electronic devices and appliances and the like. In an illustrative embodiment, the client computing devices 102 include necessary hardware and software components for establishing communications over a communication network 108, such as a wide area network or local area network. Additionally, the third party content providers 134 can include additional hardware and/or software components for delivering content to other computing devices via the communication network 108, such as Web server computing device, proxy server computing device, etc. The third party content providers 134 can obtain content specifically for distribution to client computing devices 102. In still a further embodiment, the third party content providers 134 can also be client computing devices 102 that have registered with the CDN provider 106 and can provide previously downloaded content previously to other client computing devices 102.
One skilled in the relevant art will appreciate that the components and configurations provided in FIG. 1 are illustrative in nature. Accordingly, additional or alternative components and/or configurations, especially regarding the additional components, systems and subsystems for facilitating communications may be utilized.
With reference now to FIGS. 2-6, the interaction between various components of the content delivery environment 100 of FIG. 1 will be illustrated. For purposes of the example, however, the illustration has been simplified such that many of the components utilized to facilitate communications are not shown. One skilled in the relevant art will appreciate that such components can be utilized and that additional interactions would accordingly occur without departing from the spirit and scope of the present disclosure.
With reference to FIG. 2, an illustrative interaction for registration of a third party content providers 134 with the CDN service provider 106 will be described. As illustrated in FIG. 2, the CDN content registration process begins with registration of the third party content providers 134 with the CDN service provider 106. In an illustrative embodiment, the third party content providers 134 utilizes a registration application program interface (“API”) to register with the CDN service provider 106 such that the third party content providers 134 can provide content on behalf of the CDN service provider 106. The registration API includes the identification of the computing devices associated with the third party content providers 134 that will provide requested resources on behalf of the CDN service provider 106. Additionally, the registration API can include additional identification information used by the CDN service provider 106 to identify content previously downloaded by the third party content providers 134 and that is available for downloading by other client computing devices 102.
One skilled in the relevant art will appreciate that upon registration, the CDN service provider 106 can begin to direct requests for content from client computing devices 102 to the third party content providers 134. With continued reference to FIG. 2, upon receiving the registration API, the CDN service provider 106 obtains and processes the registration information. In an illustrative embodiment, the CDN service provider 106 can use the registration information to identify the criteria used to direct client computing device content requests to the specific third party content provider 134. Examples of the criteria include defining geographic information or network affiliation information that can be used in associating a network proximity, whether physical or logical, to an identified client computing device. The network proximity can be used as factor in identifying the third party content providers 134 as a possible source of content for a requesting client computing device.
In another embodiment, the CDN service provider 106 can also use the registration information to identify content previously downloaded by the third party content providers 134 (such as acting in the capacity as a client computing device 102). In still a further embodiment, the CDN service provider 106 can also use the registration information to establish, or otherwise confirm, financial or account information that the CDN service provider 106 will utilize to reconcile with the third party content provider 134 for content provided to client computing devices. For example, the CDN service provider 106 the financial or account information can corresponds to account information for a particular financial institution, user identifiers for additional third party services utilized to exchange value between parties, or other information utilized in accordance with a particular type of reconciliation used between the CDN service provider 106 and the third party content provider 134. One skilled in the relevant art will appreciate that various types of additional information may be generated by the CDN service provider 106.
The CDN service provider 106 returns a confirmation of the registration of the third party content provider 134. Additionally, in an illustrative embodiment, the CDN service provider 106 can begin providing content to the third party content provider 134, or instructions for downloading content from a cache server component of a POP, such as POP 116. The third party content provider 134 obtains the confirmation and begins performing any additional activity in correspondence with the confirmed registration, such as preparing previously downloaded content or downloading identified content in anticipation of incoming requests from the client computing devices 102.
With reference now to FIG. 3, after completion of the registration processes illustrated in FIG. 2, the third party content provider 134 is available as a provider for requested content. Accordingly, a client computing device 102 subsequently generates a content request that is received and processed by the content provider 104, such as through the Web server 110. In accordance with an illustrative embodiment, the request for content can be in accordance with common network protocols, such as the hypertext transfer protocol (“HTTP”). Upon receipt of the content request, the content provider 104 identifies the appropriate responsive content. In an illustrative embodiment, the requested content can correspond to a Web page that is displayed on the client computing device 102 via the processing of information, such as hypertext markup language (“HTML”), extensible markup language (“XML”), and the like. The requested content can also include a number of embedded resource identifiers that correspond to resource objects that should be obtained by the client computing device 102 as part of the processing of the requested content. The embedded resource identifiers can be generally referred to as original resource identifiers or original URLs.
Generally, the identification of the resources originally directed to the content provider 104 will be in the form of a resource identifier that can be processed by the client computing device 102, such as through a browser software application. In an illustrative embodiment, the resource identifiers can be in the form of a uniform resource locator (“URL”). Because the resource identifiers are included in the requested content directed to the content provider, the resource identifiers can be referred to generally as the “content provider URL.” For purposes of an illustrative example, the content provider URL can identify a domain of the content provider 104 (e.g., contentprovider.com), a name of the resource to be requested (e.g., “resource.xxx”) and a path where the resource will be found (e.g., “path”). In this illustrative example, the content provider URL has the form of:
http://www.contentprovider.com/path/resource.xxx
During an illustrative translation process (not shown), the content provider URL can be modified such that requests for the resources associated with the translated URLs resolve to a POP associated with the CDN service provider 106 instead of the content provider 104. In one embodiment, the translated URL identifies the domain of the CDN service provider 106 (e.g., “cdnprovider.com”), the same name of the resource to be requested (e.g., “resource.xxx”) and the same path where the resource will be found (e.g., “path”). Additionally, the translated URL can include additional processing information (e.g., “additional information”). The translated URL would have the form of:
http://additional_information.cdnprovider.com/path/resources.xxx
In another embodiment, the information associated with the CDN service provider 106 is included in the modified URL, such as through prepending or other techniques, such that the translated URL can maintain all of the information associated with the original URL. In this embodiment, the translated URL would have the form of:
http://additional_information.cdnprovider.com/www.contentprovider.com/path/resource.xxx
With reference now to FIG. 4, upon receipt of the requested content, the client computing device 102, such as through a browser software application, begins processing any of the markup code included in the content and attempts to acquire the resources identified by the embedded resource identifiers. Accordingly, the first step in acquiring the content corresponds to the issuance, by the client computing device 102 (through its local DNS resolver), of a DNS query for the Original URL resource identifier that results in the identification of a DNS server authoritative to the “.” and the “com” portions of the translated URL. After resolving the “.” and “com” portions of the embedded URL, the client computing device 102 then issues a DNS query for the resource URL that results in the identification of a DNS server authoritative to the “.cdnprovider” portion of the embedded URL. The issuance of DNS queries corresponding to the “.” and the “com” portions of a URL are well known and have not been illustrated.
In an illustrative embodiment, the successful resolution of the “cdnprovider” portion of the original URL identifies a network address, such as an IP address, of a DNS server associated with the CDN service provider 106. In one embodiment, the IP address can be a specific network address unique to a DNS server component of a POP. In another embodiment, the IP address can be shared by one or more POPs. In this embodiment, a further DNS query to the shared IP address utilizes a one-to-many network routing schema, such as anycast, such that a specific POP will receive the request as a function of network topology. For example, in an anycast implementation, a DNS query issued by a client computing device 102 to a shared IP address will arrive at a DNS server component logically having the shortest network topology distance, often referred to as network hops, from the client computing device. The network topology distance does not necessarily correspond to geographic distance. However, in some embodiments, the network topology distance can be inferred to be the shortest network distance between a client computing device 102 and a POP.
With continued reference to FIG. 4, in either of the above identified embodiments (or any other embodiment), a specific DNS server in the DNS component 118 of a POP 116 receives the DNS query corresponding to the original URL from the client computing device 102. Once one of the DNS servers in the DNS component 118 receives the request, the specific DNS server attempts to resolve the request. In one illustrative embodiment as shown in FIG. 4, a specific DNS server resolves the DNS query by identifying a set of network addresses, such as IP addresses, of computing devices that will process the request for the requested resource. The set of network addresses can include one or more IP addresses that correspond to specific computing devices. Alternatively, the IP address can correspond to a hardware/software selection component (such as a load balancer) that will be used to direct a subsequent content request from the client computing device to a specific computing device. In an illustrative embodiment, the set of network addresses includes a network address for one or more third party content providers 134 and one or more cache components of a POP associated with the CDN service provider 106.
With further reference to FIG. 4, the specific DNS server can utilize a variety of information in selecting the set of network addresses returned to the client computing device 102. In an illustrative embodiment, the DNS server can determine a class, or cluster, associated with the requesting client computing device. For example, the class can correspond to a specific geographic region to which the client computing device belongs or an internet service provider for the client computing device. Such class information can be determined from the client directly (such as information provided by the client computing device or ISP) or indirectly (such as inferred through a client computing device's IP address). The DNS server can also utilize specific network topology information to identify network commonality, or network proximities, between the client computing device 102 and third party content providers 134.
In another embodiment, the specific DNS can utilize information about the third party content providers 134 in generating the set of network addresses. For example, third party providers 134 may be selected if it has previously downloaded the requested content or portions of the requested content. The third party providers 134 may also be selected based on a network proximity to the client computing device 102, contractual agreements between the CDN service provider 106 and the specific third party provider 134 (e.g., specifying a specific number of client computing device content requests), geographic criteria associated by the CDN service provider (such as associating the geographic criteria of a resource cache component to a content provider), or other selection criteria.
With continued reference to FIG. 4, in addition to the set of network addresses, the CDN service provider 106 also provides reconciliation information, such as electronic tokens, for use by the third party content providers 134. In an illustrative embodiment, the reconciliation information will be provided accompanied by any resource request submitted by the client computing device 102 to an identified third party content provider 134. For additional security/integrity purposes, the CDN service provider 106 can included additional information in the electronic tokens, such as a client computing device identifier information, timestamp information, third party content provider 134 identifiers, and the like. For example, a client computing device identifier can be incorporated into the electronic information, such via a hashing algorithm, in an effort to limit unauthorized duplication of the electronic tokens or fraudulent or repetitive reconciliations by a third party content provider 134. One skilled in the relevant art will appreciate that any one of a variety of electronic token, micropayment, or credit management methodologies may be incorporated in the CDN environment for reconciling content provided by a third party content provider 134.
With reference now to FIGS. 5A and 5B, alternative steps implemented by a client computing device 102 to obtain requested content (e.g., content corresponding to the embedded URLs) from a third party content provider 134 or from a resource cache component 120, respectively, will be described. In an illustrative embodiment, the requested content may be segmented into a set of smaller content segments or content chunks. The CDN service provider 106 may utilize any one of a number of segmentation algorithms or methodologies for processing requested content into segments/chunks. In one example, each content segment/content chunk may be of a standardized size such that the requested content can be segment into a set of standard sized chunks. In another example, the content segment/content chunks may be of varied size as determined by the segmentation algorithm, For example, content segment/content chunk size may be selected to improve transmission speeds of the content segments/chunks, for mitigating storage utilization of the content segments/chunks, for defining common repetitive data within content (e.g., repetitive use of the same segment/chunk) or based otherwise processing the requested content. Accordingly, the interactions illustrated in FIGS. 5A and 5B may be implemented such that the CDN service provider 106 identifies a set of network addresses for each content segment/content segment, or alternatively, a set of network addresses cumulatively capable of providing all of the content segments/content chunks making up the requested content.
With reference to FIG. 5A, the client computing device 102 transmits a request for the requested content and the reconciliation information (e.g., the electronic token) to a third party provider 134 in the set of network addresses provided by the CDN service provider 106. In an illustrative embodiment, the client computing device 102 prioritizes requests for the content to third party providers 106 over requests for content to an identified resource cache component. The priority can be expressed in terms of the order of the listing of applicable network addresses in the set of network addresses provided by the CDN service provider 106. As previously described, the request for content can identify one or more content segments/content chunks of the requested content. Alternatively, the request for content can specify the content as a whole.
Upon receipt of the content request from the client computing device 102, the third party content provider 134 determines whether the requested content, or a portion of the requested content, is available. If the requested content, or portions thereof, is available the requested content is transmitted back to the client computing device 102 and the third party content provider 134 stores the reconciliation information (or otherwise validates its use). If the requested content is not available, but the third party content provider 134 has one or more content segments or content chunks available, the third party content provider 134 may transmit the available content segments/content chunks. Additionally, the third party content provider 134 may attempt to obtain any non-available content segments/content chunks from other sources, such as a resource cache component 120 or origin server 112 of the content provider 104. Alternatively, if the requested content (or content segment/chunk) is not available or if the client computing device 102 has specified for the entire requested content, the receiving third party content provider 134 can return a negative acknowledgement, error message, or other indication (including no indication) that the requested content or a portion of the requested content is unavailable.
With reference now to FIG. 5B, in an illustrative example, assuming that one or more content segments/content chunks are unavailable at the identified third party content providers 134, the client computing device 102 transmits requests for the requested content (or remaining portions thereof) to the resource cache component 120. The resource cache component 120 processes the request and the requested content (or portions thereof) is transmitted to the client computing device 102. If the requested content is not available, the resource cache component 120 may obtain the requested content portions from other POPs or from the origin server 112 of the content provider 104. At this point, it is assumed that the client computing device 102 has been provided the entire requested content from the specified third party content providers 134 or resource cache component 120, or combination thereof.
With reference now to FIG. 6, the third party content providers 134 may reconcile with the CDN service provider 106 for content provided on behalf of the CDN service provider 106 to client computing devices 102. The reconciliation may occur on a per transaction basis subsequent to the third party content provider 134 processing a content request from the client computing device 102. Alternatively, the reconciliation may occur as part of a bulk or batch request subsequent to a number of processed requests. The reconciliation request can include the electronic tokens collected from the client computing devices 102 as well as additional reconciliation information such as transaction logs, tracking or metric information and specific reconciliation instructions (e.g., account numbers or crediting preferences).
The CDN service provider 106 receives the reconciliation request and processes the request. In one embodiment, the CDN service provider 106 can perform security and/or verification processes to the reconciliation requests. For example, the CDN service provider 106 can utilize various client computing device identifiers to identify potential fraudulent transactions. Additionally, the CDN service provider 106 can also perform additional actions or collect additional information (such as confirmation from a client computing device). As appropriate, the CDN service provider 106 can then reconcile with the third party content provider 134 as appropriate. For example, the CDN service provider 106 can initiate for the crediting of an account associated with the CDN service provider 106. In another example, the CDN service provider 106 can interface with a network resource, such as a Web service or Web site, to initiate an appropriate credit. Still further, the CDN service provider 106 can update tracking information for later reconciliation or bulk reconciliation. The CDN service provider 106 then transmits a confirmation and/or any credit information. One skilled in the art will appreciate that the specific reconciliation acts will be dependent on one of a variety of reconciliation methods implemented by the CDN service provider 106. Accordingly, variations or alternatives in accordance with a selected reconciliation method are considered to be within the scope and spirit of the present disclosure and the illustrative examples should not be construed as limiting.
With reference now to FIG. 7, one embodiment of a content request processing routine 700 implemented by the CDN service provider 106 for processing a resource request from a client computing device 102 will be described. At block 702, the CDN service provider 106 obtains a DNS query from the client computing device 102 for one or more embedded URLs. As previously described, the embedded URLs can correspond to content to be requested in conjunction with a Web page provided by the content provider 104.
At block 704, the CDN service provider 106 associates the requested content into one or more content segments. As previously described, the requested content can be subdivided into a number of content segments or content chunks utilizing a variety of methodologies. At block 706, the CDN service provider 106 identifies one or more registered third party third party content providers 134 and resource cache components that can provide the requested content segment or content chunk. In an illustrative embodiment, the determination of which third party content providers 134 and/or resource cache components can be a function of the content previously provided, or otherwise previously stored, on the third party content provider 134 or resource cache component. Additionally, or alternatively, the determination of which third party content providers 134 and/or resource cache components can be a function of a network proximity (or other factors) regardless of whether the particular third party content providers 134 and/or resource cache components presently has the requested content. At decision block 708, a test is conducted to determine whether additional resource segments exist. If so, the routine 700 returns to block 706 for an identification of third party content providers 134 and/or resource cache components for the additional resource segments. One skilled in the relevant art will appreciate, however, that routine 700 may be implemented in a manner such that the CDN service provider 106 identifies third party content providers 134 and/or resource cache components for the requested content as a whole and not for content segments.
Once all the appropriate third party content providers 134 and/or resource cache components have been identified, at block 701, the CDN service provider 106 transmits identification and appropriate reconciliation information (e.g., electronic tokens) responsive to the client computing device 102 DNS query. As previously described, the identification information may be prioritized by order, or other prioritization information, such that the client computing device 102 will transmit resource requests to the third party content providers 134 prior to transmitting resource requests to an identified resource cache component. In an alternative embodiment, the CDN service provider 106 may transmit information, such as identifier information, that allows the client computing device 102 to utilize a network resource, such as a Web service, to obtain the appropriate reconciliation information or to otherwise allow the client computing device 102 to generate the appropriate reconciliation information locally.
At block 712, the CDN service provider 106 obtains reconciliation requests from one or more third party content providers 134. For purposes of this illustrative embodiment, it is assumed that the client computing device 102 has been successful in obtaining at least one content segment or content chunk from a third party content provider 134. As previously discussed, the third party content providers 134 may transmit the reconciliation requests upon completion of a content segment download to a client computing device 102 or alternatively, asynchronously, such as in a batch processing. The reconciliation requests can also include additional metric information or utilization information collected by the third party content provider 134 in processing the resource request from the client computing device 102.
At block 714, the CDN service provider 106 reconciles with the third party content providers 134. As previously disclosed, the CDN service provider 106 can reconcile in a variety of manners. In one example, the CDN service provider 106 may be credit a financial institution account associated with the third party content provider 134 or cause such an account to be credited. In another example, the CDN service provider 106 may interface with a network resource, such as Web service or Web site, to have a credit provided to an account or profile associated with third party content provider 134 (e.g., a rewards program). In still another example, the CDN service provider 106 may increment tracking information that tracks the transaction information. Such tracking information may be utilized by either the CDN service provider 106 or the third party content provider 134 at a later date. At block 716, the routine 700 terminates.
With reference now to FIG. 8, a request routing processing routine 800 implemented by a client computing device 102 will be described. At block 802, the client computing device 102 transmits a DNS query to the CDN service provider 106 for requested content. As previously stated, in an illustrative embodiment, the DNS query corresponds to embedded URLs in content (e.g., a Web page) provided by the content provider 104. At block 804, the client computing device 102 obtains a set of network addresses from the CDN service provider 106 in resolution of the DNS query. As previously described, the set of network addresses corresponds to an identification of third party content providers 134 and/or resource cache components that can process the resource request from the client computing device 102. Additionally, the set of network addresses may be prioritized to indicate the order in which the content should be requested by the client computing device 102. As previously discussed, in an illustrative embodiment, the requested content can be divided into various content segments or content chunks. Accordingly, the set of network addresses can be specified for each identifiable content segment or content chunk or alternatively, for the cumulative set of content segments/chunks.
At block 806, the client computing device 102 transmits a request for content to the identified third party provider(s) 134 in the set of network addresses. Additionally, the request for content can include the additional reconciliation information that will be utilized by the third party content provider 134 to reconcile with the CDN service provider 106. At decision block 808, a test is conducted to determine whether the requested content, or content segment, is available from the third party content provider 134. If so, the routine 800 proceeds to decision block 812, which will be described below. If the content is not available from the third party content provider 134 (or if the third party content provider 134 is otherwise unavailable), at block 810, the client computing device 102 transmits the content request to the resource cache component(s) identified in the set of network addresses. It is assumed that the receiving resource cache component will obtain the requested content if it is not previously available.
If the content is available from the third party content provider 134 at decision block 808 or once the content has been request from the resource cache component at block 810, at decision block 812, a test is conducted to determine whether additional content segments are to be requested. If so, the routine 800 returns to block 806 for request of the content from the third party content provider 134. If not, or if the content is otherwise not able to be segmented, the routine terminates at block 814.
It will be appreciated by those skilled in the art and others that all of the functions described in this disclosure may be embodied in software executed by one or more processors of the disclosed components and mobile communication devices. The software may be persistently stored in any type of non-volatile storage.
Conditional language, such as, among others, “can,” “could,” “might,” or “may,” unless specifically stated otherwise, or otherwise understood within the context as used, is generally intended to convey that certain embodiments include, while other embodiments do not include, certain features, elements and/or steps. Thus, such conditional language is not generally intended to imply that features, elements and/or steps are in any way required for one or more embodiments or that one or more embodiments necessarily include logic for deciding, with or without user input or prompting, whether these features, elements and/or steps are included or are to be performed in any particular embodiment.
Any process descriptions, elements, or blocks in the flow diagrams described herein and/or depicted in the attached figures should be understood as potentially representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps in the process. Alternate implementations are included within the scope of the embodiments described herein in which elements or functions may be deleted, executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those skilled in the art. It will further be appreciated that the data and/or components described above may be stored on a computer-readable medium and loaded into memory of the computing device using a drive mechanism associated with a computer readable storing the computer executable components such as a CD-ROM, DVD-ROM, or network interface further, the component and/or data can be included in a single device or distributed in any manner. Accordingly, general purpose computing devices may be configured to implement the processes, algorithms and methodology of the present disclosure with the processing and/or execution of the various data and/or components described above.
It should be emphasized that many variations and modifications may be made to the above-described embodiments, the elements of which are to be understood as being among other acceptable examples. All such modifications and variations are intended to be included herein within the scope of this disclosure and protected by the following claims.

## Claims

1. A computer-implemented method comprising:
obtaining, by a content delivery network (CDN) provider, a request for content from a client device;
associating, by a CDN provider, the requested content into a set of content segments;
for individual content segments in the set of content segments, identifying a content provider and a cache component associated with the CDN provider for providing the individual content segments,
wherein the content provider is independent of the CDN provider such that providing of content segments by the content provider requires reconciliation information, and
wherein providing of content segments by the cache component associated with the CDN provider does not require reconciliation information;

responsive to the request for content, providing, by the CDN provider, client device reconciliation information and network addresses of the content provider for individual content segments, wherein the client device reconciliation information includes information to be used in providing reconciliation information by the client device to the content provider;
obtaining, by the CDN provider, from the content provider a reconciliation request for providing requested content segments to a requesting client device, wherein the reconciliation request includes registered content provider reconciliation information based on the client device reconciliation information provided to the client device; and
reconciling, by the CDN provider, the reconciliation request from the content provider in accordance with the registered content provider reconciliation information, wherein reconciling the reconciliation request comprises verifying the reconciliation request based on matching an electronic token received with the reconciliation request with an electronic token provided in response to the content request from the client device.

2. The method as recited in claim 1 further comprising:
obtaining registration requests from third party computing devices;
associating the third party computing devices as registered content providers; and
providing at least one content segment to the registered content providers.

3. The method as recited in claim 1, wherein the set of content segments corresponds to equal sized content segments.

4. The method as recited in claim 1, wherein the set of content segments corresponds to varied sized content segments.

5. The method as recited in claim 1 further comprising:
identifying a set of content providers according to geographic criteria; and
distributing the requested content to the identified set of content providers such that at least one copy of each content segment in the set of content segments is stored by one content provider in the set of content providers.

6. The method as recited in claim 5, wherein the geographic criteria corresponds to an identified geographic region associated with the corresponding resource cache component in the identification information.

7. The method as recited in claim 5, wherein distributing the requested content to the identified set of content providers includes distributing the requested content in response to a separate content request from a content provider.

8. The method as recited in claim 1, wherein identifying the content provider and the cache component associated with the CDN provider for providing the individual content segments includes identifying the content provider and the cache component associated with the CDN provider based on a network address of the client device.

9. The method as recited in claim 1, wherein identifying the content provider and the cache component associated with the CDN provider for providing the individual content segments includes identifying the content provider and the cache component associated with the CDN provider based on a class associated with the client device.

10. The method as recited in claim 1, wherein the reconciliation information includes an electronic token including information unique to the client device.

11. The method as recited in claim 1, wherein the reconciliation information includes an electronic token including information unique to a registered computing device.

12. The method as recited in claim 1, wherein the network addresses of the identified content provider for individual content segment are prioritized in an order of a preferred provider of the requested content segment.

13. The method as recited in claim 12, wherein the preferred provider is based on a network latency for delivery of the requested content.

14. The method as recited in claim 1, wherein reconciling the reconciliation request from the content provider includes initiating a financial transaction with an account associated with the content provider.

15. The method as recited in claim 1, wherein reconciling the reconciliation request from the content provider includes updating tracking information associated with the content provider.

16. A non-transitory computer readable medium having computer executable instructions for performing the method recited in claim 1.

17. A content delivery network (CDN) system comprising:
at least one computing device that:
obtains a request for content from a client device;
associates the requested content into a set of content segments;
for individual content segments in the set of content segments, identifies a content providers and a cache component associated with the CDN system for providing the individual content segments,
wherein the content provider is independent of the CDN provider such that providing of content segments by the content provider requires reconciliation information, and
wherein providing of content segments by the cache component associated with the CDN provider does not require reconciliation information;

responsive to the request for content, provides client device reconciliation information and network addresses of the content provider for individual content segments, wherein the client device reconciliation information includes information to be used in providing reconciliation information by the client device to the content provider;
obtains from the content provider a reconciliation request for providing requested content segments to a requesting client device, wherein the reconciliation request includes registered content provider reconciliation information based on the client device reconciliation information provided to the client device; and
reconciles the reconciliation request from the content provider in accordance with the registered content provider reconciliation information, wherein reconciling the reconciliation request comprises verifying the reconciliation request based on matching an electronic token received with the reconciliation request with an electronic token provided in response to the content request from the client device.

18. The system as recited in claim 17, wherein the at least one computing device further:
obtains registration requests from third party computing devices;
associates the third party computing devices as registered content providers; and
provides at least one content segment to the registered content providers.

19. The system as recited in claim 17, wherein the at least one computing device further:
identifies a set of content providers according to geographic criteria; and
distributes the requested content to the identified set of content providers such that at least one copy of each content segment in the set of content segments is stored by one content provider in the set of content providers.

20. The system as recited in claim 17, wherein identifying the content provider and the cache component associated with the CDN provider for providing the individual content segments includes identifying the content provider and the cache component associated with the CDN provider based on a network address of the client device.

21. The system as recited in claim 17, wherein identifying the content provider and the cache component associated with the CDN provider for providing the individual content segments includes identifying the content provider and the cache component associated with the CDN provider based on a class associated with the client device.