I. Field of the Invention
The present invention relates to telecommunications, and more particularly, to wireless communications.
II. Description of the Related Art
Wireless communications systems provide wireless service to a number of wireless or mobile units situated within a geographic region. The geographic region supported by a wireless communications system is divided into spatially distinct areas commonly referred to as “cells.” Each cell, ideally, may be represented by a hexagon in a honeycomb pattern. In practice, however, each cell may have an irregular shape, depending on various factors including the topography of the terrain surrounding the cell. Moreover, each cell is further broken into two or more sectors. Each cell is commonly divided into three sectors, each having a range of about 120 degrees, for example.
A conventional cellular system comprises a number of cell sites or base stations geographically distributed to support the transmission and reception of communication signals to and from the wireless or mobile units. Each cell site handles voice communications within a cell. Moreover, the overall coverage area for the cellular system may be defined by the union of cells for all of the cell sites, where the coverage areas for nearby cell sites overlap to ensure, where possible, contiguous communication coverage within the outer boundaries of the system's coverage area.
Each base station comprises at least one radio and at least one antenna for communicating with the wireless units in that cell. Moreover, each base station also comprises transmission equipment for communicating with a Mobile Switching Center (“MSC”). A mobile switching center is responsible for, among other things, establishing and maintaining calls between the wireless units, between a wireless unit and a wireline unit through a public switched telephone network (“PSTN”), as well as between a wireless unit and a packet data network (“PDN”), such as the Internet. A base station controller (“BSC”) administers the radio resources for one or more base stations and relays this information to the MSC.
When active, a wireless unit receives signals from at least one base station over a forward link or downlink and transmits signals to at least one base station over a reverse link or uplink. Several approaches have been developed for defining links or channels in a cellular communication system, including time-division multiple access (“TDMA”), orthogonal-frequency division multiple access (“OFDMA”) and code-division multiple access (“CDMA”), for example.
In TDMA communication systems, the radio spectrum is divided into time slots. Each time slot is designed to allow only one user to transmit and/or receive in this scheme. Thusly, TDMA may require precise timing between the transmitter and receiver so that each user may transmit their information during their allocated time.
In a CDMA scheme, each wireless channel is distinguished by a distinct channelization code (e.g., spreading code, spread spectrum code or Walsh code). Each distinct channelization code is used to encode different information streams. These information streams may then be modulated at one or more different carrier frequencies for simultaneous transmission. A receiver may recover a particular stream from a received signal using the appropriate channelization code to decode the received signal.
In OFDMA systems, a carrier signal may be defined by a number (e.g., 1024) of sub-carriers or tones transmitted using a set of mathematically timed orthogonal continuous waveforms. Each wireless channel may be distinguished by a distinct channelization tone. By employing continuous waveforms, the transmission and/or reception of the tones may be achieved because their orthogonality prevents them from interfering with one another.
Currently, wireless voice traffic is typically carried over circuit-switched (“CS”) type networks. The reliance on CS type networks is likely to continue over at least the short run, as plans to put voice traffic onto the packet-switched (“PS”) type network have been pushed out in time by most wireless service providers (“WSPs”). WSPs, however, have been actively upgrading their networks to add new packet-switched data capabilities, as well as expand voice capacities in the hopes of generating more revenue.
One area for revenue generation that has not been fully explored by WSPs involves the close collaboration of voice, carried over a CS type network, in combination with data/multimedia, carried over a PS type network. CS and PS networks are relatively independent of each other from the end-user and services points of view. To date, services and/or applications offered by WSPs use the strengths of one type network to the exclusion of the other. Consequently, end-users may not reap the benefits or enhanced user experience offered by the simultaneous use of both network types. WSPs have not, therefore, derived additional revenue from any enhanced services from the simultaneous use of both network types. Moreover, it may be said that WSPs' networks have not been utilized to their fullest potential.
In view of the above considerations, a method is needed to support the service to both network types. Moreover, a demand exists for a method for cooperatively providing voice service(s), carried over a CS type network, with data/multimedia service(s), carried over a PS type network, for example.
The present invention provides a method of providing service to multiple network types by a wireless unit in the context of person-to-person voice calling. More particularly, the present invention provides a method for cooperatively providing voice service(s), carried over a circuit-switched (“CS”) type network, with multimedia service(s), carried over a packet-switched (“PS”) type network to a wireless unit. For the purposes of the present invention, a multimedia service(s) includes the delivery of multimedia content, such as a video clip(s), a web page(s), as well as data services, such as the delivery of a non-multimedia content type data file(s), for example. Moreover, it should be noted that providing collaboration of voice service(s) with multimedia service(s), as stated herein, includes communication between a calling-from-party and a calling-to-party, one or both of which may be directed from a wireless or wireline unit.
In one embodiment, a method of the present invention involves the communication between a calling-from-party and a calling-to-party. The method includes the step of receiving an initiation signal from the calling-from-party for identifying the calling-to-party. In response to verifying the identity of the calling-to-party as a service subscriber in a database, the method selects multimedia content to be transmitted to the calling-from-party. A voice link may then be established to the calling-to-party in response to the initiation signal from the calling-from-party. Thereafter, the initiation signal may be bridged to establish a voice link between the calling-from-party the calling-to-party. This bridging may rely on the previously established voice link.
In another embodiment, a method of the present invention involves the communication between a calling-from-party and a calling-to-party. The method includes the step of transmitting a uniform resource locator to the calling-from-party in response to an initiation signal transmitted from the calling-from-party. The uniform resource locator may be transmitted over a data link (e.g., data session). The uniform resource locator identifies a location where multimedia content may be accessed by the calling-from-party if the calling-to-party is a service subscriber according to a database of service subscribers. Subsequently, another data link (e.g., data session) may be established for the downlink of the multimedia content. A voice link may then be established to the calling-to-party in response to the initiation signal from the calling-from-party. Thereafter, the initiation signal may be bridged to establish a voice link between the calling-from-party the calling-to-party. This bridging may rely on the previously established voice link. In response to establishing a voice link between the calling-from-party and the calling-to-party, the established data links (e.g., data sessions) may be terminated.
These and other embodiments will become apparent to those skilled in the art from the following detailed description read in conjunction with the appended claims and the drawings attached hereto.
The present invention will be better understood from reading the following description of non-limiting embodiments, with reference to the attached drawings, wherein below:
It should be emphasized that the drawings of the instant application are not to scale but are merely schematic representations, and thus are not intended to portray the specific dimensions of the invention, which may be determined by skilled artisans through examination of the disclosure herein.
Referring to
Algorithmic method 100 initially provides for the step of transmitting an initiation signal from a calling-from-party (step 110). This initiation signal is received by a communication network infrastructure element, such as a service control point/service node (e.g., server), for example. The step of transmitting the initiation signal may include entering the telephone number of the calling-to-party into the temporary memory of the calling-from-party's wireless or wireline unit. Thereafter, a corresponding send button or the like on the calling-from-party's wireless or wireline unit may be depressing so as to commence the sequence of steps in formulating a telephonic connection between the calling-from- and calling-to-parties. Consequently, the initiation signal identifies the calling-to-party.
Once the initiation signal is received by the communication network infrastructure, such as a service control point/service node, for example, a determination is made regarding the calling-to-party's status. More particularly, the service control point/service node may determine if the calling-to-party is a subscriber to the collaboration of voice and multimedia services (step 120). This step of determining may include the step of looking up the telephone number of the calling-to-party in a database of service subscribers. If the calling-to-party is determined to be a service subscriber, algorithmic method 100 proceeds as depicted in the flow chart of
After the calling-to-party is deemed a service subscriber, algorithmic method 100 may transmit multimedia content to the calling-from-party (step 130). Here, the calling-to-party's identity (e.g., telephone number) may trigger the transmission of multimedia content to the calling-from-party over a downlink channel, for example. This multimedia content may, for example, include commercial matter, such as advertising and/or marketing material, or general information, for example, selected in response to the calling-to-party's identity.
In one embodiment of algorithmic method 100, the step of transmitting multimedia content may include establishing a data link (e.g., data session) in the event the calling-to-party is found to be a service subscriber. This established data link (e.g., data session) might be formed between the calling-from-party and the service control point/service node (e.g., server). Here, the service control point/service node, and thusly, the established data link (e.g., data session) may serve as the sole resource for the step of transmitting multimedia content to the calling-from-party. It should be noted that this established data link (e.g., data session) might be rely on a packet switched (“PS”) type network.
With the transfer of the multimedia content to calling-from-party, algorithmic method 100 establishes an intermediate voice link to the calling-to-party (step 140). The intermediate voice link may be established by the service control point/service node supporting the transmissions of multimedia content to the calling-from-party. Moreover, the intermediate voice link may rely on a circuit switched (“CS”) type network.
In furtherance of desire for a collaboration of data (e.g., multimedia) service, carried over a PS type network, with the of voice service, carried over a CS type network, for example, the service control point/service node may thereafter bridge the initiation signal and the intermediate voice link (step 150). Consequently, a voice call between the calling-from-party and the calling-to-party, as initiated at the onset of algorithmic method 100, may be established and completed. It should be noted that this step of bridging may be performed after the transmission of multimedia content is concluded, though it is may also occur prior thereto.
Referring to
Algorithmic method 200 initially provides for the step of transmitting an initiation signal from a calling-from-party (step 110). This initiation signal is received by a communication network infrastructure element, such as a service control point/service node (e.g., server), for example. The step of transmitting the initiation signal may include entering the telephone number of the calling-to-party into the temporary memory of the calling-from-party's wireless or wireline unit. Thereafter, a corresponding send button or the like on the calling-from-party's wireless or wireline unit may be depressing so as to commence the sequence of steps in formulating a telephonic connection between the calling-from- and calling-to-parties. Consequently, the initiation signal identifies the calling-to-party.
Thereafter, a determination is made regarding the calling-to-party's identity. Here, the service control point/service node may determine if the calling-to-party is a subscriber to the collaboration of voice and multimedia services (step 220). This step of determining may include the step of looking up the telephone number of the calling-to-party in a database of service subscribers. If the calling-to-party is determined to be a service subscriber, algorithmic method 200 proceeds as depicted in the flow chart of
Once the calling-to-party is deemed a service subscriber, algorithmic method 200 establishes a data link (e.g., data session) to the calling-from-party (step 230). Here, a uniform resource locator (“URL”) may be selected in response to affirming if calling-to-party is a service subscriber. This URL may identify the location where multimedia content may be received by the calling-from-party over a downlink. It should be noted that the URL might be designated in advance by the calling-to-party, as part of the service subscription.
Subsequently, algorithmic method 200 establishes another data link (e.g., data session) (step 240). With the URL information stored in memory, this subsequent data link (e.g., data session) may be used to forward the multimedia content, as intended by the calling-to-party, to the calling-from-party. Unlike algorithmic method 100 of
With the transmission and reception of the multimedia content, algorithmic method 200 calls for establishing an intermediate voice link (step 250). This intermediate voice link is established to the calling-to-party. The intermediate voice link may be established by the service control point/service node supporting the transmissions of multimedia content to the calling-from-party. Moreover, the intermediate voice link may rely on a circuit switched (“CS”) type network.
It should be noted that in order to manage communication network resources, the aforementioned data links (e.g., data sessions) should be terminated in a logical sequence (step 260). For example, the established data link (e.g., data session) for the transmission of the URL might be terminated in response to the establishing the intermediate voice link. Sometime thereafter, the established data link (e.g., data session) for the transmission of the multimedia content may also be terminated.
In furtherance of desire for a collaboration of data (e.g., multimedia) service, carried over a PS type network, for example, with the of voice service, carried over a CS type network, the service control point/service node may thereafter bridge the initiation signal and the intermediate voice link (step 270). Consequently, a voice call between the calling-from-party and the calling-to-party, as initiated at the onset of algorithmic method 200, may be established and completed. It should be noted that this step of bridging may be performed after the transmission of multimedia content is concluded, though it is may also occur prior thereto.
The present invention may provide a framework for the creation of enhanced services utilizing simultaneous CS voice and PS data capabilities of the network. The present invention may be based on widely used telecommunication signaling technologies and Internet standards, such as a session initiation protocol (“SIP”), for example. The present invention may combine both in a manner that may minimize the impact to the existing network infrastructure.
Referring to
To realize the present invention, call flow 300 may process the call control when first wireless unit 340 initiates a voice call toward a called (wireline or wireless) receiving unit 370. Alternatively, call flow 300 may process call control if it receives other triggers from the network—e.g., answer and/or disconnect. Depending on the nature of the trigger and the call state, the application of simultaneous CS voice and PS data may enable the performance of the appropriate tasks for the service, including, for example, initiating and/or terminating a data session.
First wireless unit 340 may have a client application(s) for handling the needs of a service, such as a session initiation protocol (“SIP”) stack to process the message, establishing a multimedia session, and for streaming video and/or audio, controls, for example. User database 350 may store user, service subscription, network and/or session information for each user. The application servers may provide specific service subscriber resources—e.g., a video clip(s), a web page(s), a data file(s)—for the user.
In one example of the call flow, a calling-from-party 340 may initiate a voice call to a calling-to-party 370 over circuit-switched network 310. In turn, a Mobile Switching Center (“MSC”) may then may send the call control over to service control point/service node 330. Thereafter, service control point/service node 330 may determine if the calling-to-party 370 is a subscribers to the multimedia service (e.g., video greeting service). If so, service control point/service node 330 may transmit a video clip URL to the calling-from-party 340. This step may be realized through a SIP INVITE. Once the video clip URL is transmitted, calling-from-party 340 may receive the multimedia content associated with the URL from video server 360. Video server 350, as a result, may send the multimedia content (e.g., video greeting) to the calling-from-party 340. Subsequently, service control point/service node 330 may initiate a voice call to calling-to-party 370. After calling-to-party 370 the voice call is established from service control point/service node 330, service control point/service node 330 may transmit a termination message (e.g., BYE) to calling-from-party 340 to terminate the SIP session in which the video clip may be transmitted. Thereafter, service control point/service node 330 may then bridge the two voice call legs together. Consequently, calling-from-party 340 and calling-to-party 370 may now have a complete voice conversation.
It should be noted that personal video greeting is merely one example of a multimedia service enabled by the present invention. This multimedia service may enable a subscriber to send a personalized video-greeting message to callers while the voice call is being connected. Referring to
Referring to
Referring to
It should be noted that the principles reflected in the personal video greeting service detailed herein, for example, may be extended to other applications. Exemplary alternative applications may include on-line browsing/shopping with operator assistance. Referring to
While the particular invention has been described with reference to illustrative embodiments, this description is not meant to be construed in a limiting sense. It is understood that although the present invention has been described, various modifications of the illustrative embodiments, as well as additional embodiments of the invention, will be apparent to one of ordinary skill in the art upon reference to this description without departing from the spirit of the invention, as recited in the claims appended hereto. Consequently, the method, system and portions thereof and of the described method and system may be implemented in different locations, such as the wireless unit, the base station, a base station controller and/or mobile switching center. Moreover, processing circuitry required to implement and use the described system may be implemented in application specific integrated circuits, software-driven processing circuitry, firmware, programmable logic devices, hardware, discrete components or arrangements of the above components as would be understood by one of ordinary skill in the art with the benefit of this disclosure. Those skilled in the art will readily recognize that these and various other modifications, arrangements and methods can be made to the present invention without strictly following the exemplary applications illustrated and described herein and without departing from the spirit and scope of the present invention It is therefore contemplated that the appended claims will cover any such modifications or embodiments as fall within the true scope of the invention.