AU2015205842A1 - Network gaming system with bonus capability - Google Patents

Abstract

Abstract A bonus controller for controlling the award of a bonus at one of a plurality of gaming terminals in communication with the bonus controller via a data network, the bonus controller comprising 5 a communication interface and a memory storing a definition of a trigger event, the bonus controller being arranged to: receive at the communication interface data sent by a respective ones of the gaming terminals, the data comprising data defining a player identifier of the respective gaming terminal and data related to play of a game on the respective gaming terminal; determine an occurrence of a trigger event attributable to a selected one of the 10 gaming terminals based on the data related to play of the game on the respective gaming terminal; upon determining that the occurrence of the trigger event is attributable to the selected gaming terminal: send a token via the communication interface a to the selected gaming terminal with a token and awaiting a response from the selected gaming terminal; check that the selected gaming terminal is being played by the same player identified by the is player identifier; and subsequent to receiving the response from the gaming terminal: a) upon determining that the same identified player is playing the gaming terminal, cause the immediate award of a bonus at the gaming terminal; or b) upon determining that the identified player is not playing the gaming terminal, store data defining the bonus and the player identifier to enable the subsequent award of the bonus to the identified player. 971718M 1 ((-HMntters PRR778 AL S NICK 71/07/1S Yes Being played? No Send not Receive mlae message 7 Send beingReiv -+ played mesg message 55 I 78 Store player ientification Determine and jackpot jackpot amount Receive Send award 8 message notification "0Pae I Yes eturned? Award/ To step 76 No 92 ackpot tF57 ime expired. No Send Receive Yes acknowledgement acknowledgement 58 %81 Reset Exired jackpot jcpot 82 in 94 To step 70 Figure 6B

Description

- 1 Network gaming system with bonus capability Related Application 5 This application is a divisional application of Australian application no. 2012203677, the disclosure of which is incorporated herein by reference. Background of the invention 10 The present invention relates to gaming apparatus and methods of gaming. In particular, the present invention relates to gaming systems implemented using one or more communications networks and having a capability to provide a bonus award. A gaming machine is designed to return to players, on average, a fixed percentage of the 15 money bet. The remaining portion of the money bet is retained by the operator. Typically a gaming machine might return to players between 86% and 92% of money bet. Bonus awards are often used to increase the attractiveness of a gaming machine so that players are more likely to play that gaming machine and consequently the machine's turnover 20 is increased. A gaming machine may have an average return to player percentage of 90%. A bonus award may be offered on that machine which returns on average a further 2% of the total money wagered. Thus the standard pay schedule and the bonus award on average result in 92% of the total money wagered being returned to players. 25 Bonuses have also been provided by gaming systems that have a plurality of linked gaming machines. Traditional linked bonus award systems consist of a number of gaming machines linked by a communications network to a bonus award controller. Bonus award systems were typically one of two types: standard link progressive systems and mystery link progressive systems. 30 A standard link progressive system operates by a jackpot server counting the number of a preselected type of event on the link progressive system. Typically a percentage of wagers placed on each gaming machine in the system is used to increase the progressive jackpot. Each gaming machine is able to generate a progressive win combination in its game. When 35 this occurs, the gaming machine Informs the jackpot server of this event and the jackpot is awarded to a player at the gaming machine that generated the progressive win combination. The progressive jackpot is then typically reset to a predetermined seed value and increases 971718M 1 (l HMntters PRR778 AL S NICK 71/07/1S - 2 with play of the gaming machines until the next time one of the gaming machines generates a progressive win combination. Mystery link progressive systems also operate by counting the number of a preselected type of 5 event occurring on the mystery link progressive system. The events are typically a type which related to the credits wagered on the linked machines. Typically the type of events counted are either credits wagered or games played on the linked gaming machines. An event counter stored in the bonus controller is used to count the number of the events as they occurred. 10 The bonus controller counts the events until the event counter reaches a predetermined event count. When the event counter reaches the predetermined event count, the bonus controller awards the payment of the mystery prize pool to the linked gaming machine which caused the event counter to reach the predetermined event count. The predetermined event count is typically generated by randomly selecting a number within pre-defined upper and lower limits. 15 There exists a need in the industry for alternative methods of providing a bonus in a network gaming system. A problem with central determination of the awarding of a bonus is that there is a chance that 20 the player that caused the awarding of the bonus by playing a gaming machine may leave the gaming machine in the time it takes for the gaming machine to communicate to a server a message indicating a coin-in event at the gaming machine and for the server to send back a message indicating the award of a bonus. This problem may be more likely to occur when a wide area network is used in the communication path between the gaming machine and the 25 server. Any reference in this specification to the prior art does not constitute an admission that such prior art was well known or forms part of the common general knowledge in any jurisdiction. 30 Summary of the invention According to a first aspect of the invention, there is provided a bonus controller for controlling the award of a bonus at one of a plurality of gaming terminals in communication with the bonus controller via a data network, the bonus controller comprising a communication interface and a 35 memory storing a definition of a trigger event, the bonus controller being arranged to: receive at the communication interface data sent by a respective ones of the gaming terminals, the data comprising data defining a player identifier of the respective gaming terminal and data related to play of a game on the respective gaming terminal; 971718M 1 (l HMntters PRR778 AL S NICK 71/07/1S - 3 determine an occurrence of a trigger event attributable to a selected one of the gaming terminals based on the data related to play of the game on the respective gaming terminal; upon determining that the occurrence of the trigger event is attributable to the selected gaming terminal: 5 send a token via the communication interface a to the selected gaming terminal with a token and awaiting a response from the selected gaming terminal; check that the selected gaming terminal is being played by the same player identified by the player identifier; and subsequent to receiving the response from the gaming terminal: 1o a) upon determining that the same identified player is playing the gaming terminal, cause the immediate award of a bonus at the gaming terminal; or b) upon determining that the identified player is not playing the gaming terminal, store data defining the bonus and the player identifier to enable the subsequent award of the bonus to the identified player. 15 The controller may store data defining a bonus and the player identifier received from the gaming machine, subsequently monitor for receipt at the communication interface data defining that player identifier, identify from that data the gaming machine that generated the data, and in response communicate information relating to the bonus to the identified gaming 20 machine. In one embodiment, the information relating to the bonus may comprise data defining the bonus so as to allow the identified gaming machine to award the bonus. In one embodiment, the bonus may be a progressive jackpot and following communication of information relating to the bonus to the identified gaming machine, the controller awaits acknowledgement from the gaming machine that the bonus has been awarded and then one 25 of resets and reduces the value of the progressive jackpot. When the bonus controller stores details of a bonus and the player identifier received from the gaming machine, it may subsequently output information of use in sending a notification to the player identified by the player identifier that he or she has won a bonus. The information of use 30 in sending a notification to the player may only be output if a certain period of time has elapsed since the details of a bonus and the player identifier received from the gaming machine were stored and the bonus controller has not, prior to expiration of the certain period, caused the award of the bonus. 35 According to a second aspect of the invention, there is provided a method of controlling the award of a bonus at one of a plurality of gaming terminals in communication with a bonus controller via a data network, the bonus controller comprising a communication interface and a memory storing a definition of a trigger event, the bonus controller being arranged to: 971718M 1 (l HMntters PRR778 AL S NICK 71/07/1S - 4 receiving at the communication interface data sent by a respective ones of the gaming terminals, the data comprising data defining a player identifier of the respective gaming terminal and data related to play of a game on the respective gaming terminal; determining an occurrence of a trigger event attributable to a selected one of the 5 gaming terminals based on the data related to play of the game on the respective gaming terminal; upon determining that the occurrence of the trigger event is attributable to the selected gaming terminal: sending a token via the communication interface a to the selected 10 gaming terminal with a token and awaiting a response from the selected gaming terminal; checking that the selected gaming terminal is being played by the same player identified by the player identifier; and subsequent to receiving the response from the gaming terminal: 15 a) upon determining that the same identified player is playing the gaming terminal, causing the immediate award of a bonus at the gaming terminal; or b) upon determining that the identified player is not playing the gaming terminal, storing data defining the bonus and the player identifier to enable the subsequent award of the bonus to the identified player. 20 Further aspects of the present invention will also become apparent from the following description, given by way of example and with reference to the accompanying drawings. Brief description of the drawings 25 Figure 1: shows diagrammatically, a view of a gaming machine suitable for implementing the present invention. Figure 2: shows a block diagram of gaming apparatus suitable for implementing the 30 present invention. Figure 3: shows a block diagram of components of the memory of the gaming apparatus represented in Figure 2. 35 Figure 4: shows diagrammatically, a network gaming system suitable for implementing the present invention. 971718M 1 ((-HMntters PRR778 AL S NICK 71/07/1S - 5 Figure 5: shows a flow diagram of a process to be performed by the network gaming system of Figure 4 in accordance with one embodiment of the present invention. Figure 6: shows a flow diagram of a process to be performed by the network gaming 5 system of Figure 4 in accordance with another embodiment of the present invention. Detailed description In Figure 1 of the accompanying drawings, a gaming machine suitable for use in a network 10 gaming system of the present invention is generally referenced by arrow 10. The gaming machine 10 includes a console 12 having a display 14 on which is displayed representations of a game 16, that can be played by a player. A mid-trim 20 of the gaming machine 10 houses a bank of buttons 22 for enabling a player to play the game 16. The mid 15 trim 20 also houses a credit input mechanism 24 including a coin input chute 24A and a bill collector 24B. A top box 26 may carry artwork 28, including for example, pay tables and details of bonus awards and other information or images relating to the game. Further artwork and/or information may be provided on the front panel 29 of the console 12. A coin tray 30 is mounted beneath the console 12 for cash payouts from the gaming machine 10. 20 The display 14 shown in Figure 1 is in the form of a video display unit, particularly a cathode ray tube screen device. Alternatively, the display 14 may be a liquid crystal display, plasma screen, any other suitable video display unit, or the visible portion of an electromechanical device. In this latter respect, if the game 16 is a spinning reel game, the display 14 may use a 25 stepper motor to control the position of physical reels. The top box 26 may also be a display, for example a video display unit, which may be the same type as the display 14, or a different type of display. Figure 2 shows a block diagram of a gaming apparatus, generally referenced by arrow 100, 30 suitable for implementing the present invention. The gaming apparatus 100 may operate as a networked gaming machine, communicating with other network devices, such as one or more servers or other gaming machines. The gaming apparatus 100 may have distributed hardware and software components that communicate with each other directly or through a network. Accordingly, different reference numerals have been used in Figure 2 from Figure 1 for 35 components that may be equivalent. The gaming apparatus 100 includes a game controller 101, which in the illustrated example includes a microprocessor, microcontroller, programmable logic device or other computational 971718M 1 (l HMntters PRR778 AL S NICK 71/07/1S - 6 device 102. Instructions and data to control operation of the computational device 102 are stored in a memory 103, which is in data communication with the computational device 102. Typically, the gaming apparatus 100 will include both volatile and non-volatile memory and more than one of each type of memory, with such memories being collectively represented by 5 the memory 103. In addition, the computational device 102 may include two or more computational devices that each perform computational functions and which may be located locally or remotely from each other. The instructions to cause the game controller 101 to implement games will be stored in the memory 103. 10 The gaming apparatus may include meters 104 for the purposes of regulatory compliance and also include an input/output (1/O) interface 105 for communicating with the peripheral devices of the gaming apparatus 100. The input/output interface 105 and/or the peripheral devices may be intelligent devices with their own memory for instructions and data. 15 In the example shown in Figure 2, the peripheral devices that communicate with the controller are one or more displays 106, user interfaces 107, a card and/or ticket reader 108, a printer 109, a bill acceptor and/or coin input mechanism 110 and a coin output mechanism 111. Additional devices may be included in the gaming apparatus 100 or devices omitted as required. One or more of the peripheral devices may be an intelligent peripheral device, having 20 its own memory containing instructions and data. The gaming apparatus 100 includes a communications interface, for example a network card 112, to communicate with a network for such purposes as sending status information, accounting information and the like to a central controller, allowing communication from the 25 central controller to the gaming apparatus 100 or for other purposes. In one embodiment, the functions of the computational device 102 may be split between a remote device and a local device, for example with game outcomes generated remotely and game graphics for the display 106 generated locally. In another embodiment, the peripheral devices only may be provided locally together with a network interface, in which case all, or nearly all intelligent 30 devices may be located remotely of the display 106. Figure 4 shows a gaming system 200. The gaming system 200 includes a network 201, which for example may be an Ethernet network. Gaming terminals 202, shown arranged in three banks 203 of two gaming terminals 202 in Figure 3, are connected to the network 201. The 35 gaming terminals 202 may be gaming machines 10, as shown in Figure 1 or form part or all of another gaming apparatus 100. Single gaming terminals 202 and banks 203 containing three or more gaming terminals 202 may also be connected to the network 201. 971718M 1 (l HMntters PRR778 AL S NICK 71/07/1S - 7 One or more displays 204 may also be connected to the network 201. The displays 204 may, for example, be associated with a bank 203 of gaming devices. The displays 204 may be used to display representations associated with game play on the gaming terminals 202, and/or used to display other representations, for example promotional or informational material. 5 Servers may also be connected to the network 201. For example, a game server 205 may generate game outcomes for games played on the gaming terminals 202, a database management server 206 may be connected to a database (not shown) containing game programs and associated data for downloading or access by the gaming terminals 202 and a 10 jackpot server 207 may control one or more jackpots associated with the gaming terminals 202. Further servers may be provided to assist in the administration of the gaming system 200, including for example a gaming floor management server 208, and a licensing server 209 to 15 monitor the use of licenses to particular games. An administrator terminal 210 is provided to allow an administrator to run the network 201 and the devices connected to the network. The gaming system 200 may communicate with other gaming systems, other local networks, for example a corporate network and/or a wide area network such as the Internet. The 20 communications may be through a firewall 211, particularly where the connection includes a public network. A web server (not shown) or other appropriate communications device for the network 212 may be provided inside the firewall 211 to receive and send communications from and to the network 212 respectively. In Figure 4 the various options for the network outside the firewall 211 are collectively represented by the network 212. A second game server 213, 25 second database management server 214 and second jackpot server 215 may be provided and perform similar functions to the servers 205 - 207, but form a part of a plurality of gaming systems 200, each gaming system 200 connected to the network 212 and having the servers 205 - 207 in common. The other gaming systems may or may not have the same configuration as the gaming system 200 shown in Figure 4. 30 The present invention will be described primarily with reference to the gaming system 200 shown Figure 4. However, those skilled in the relevant arts will appreciate that there are numerous alternative configurations of gaming systems that may implement the present invention. 35 The gaming system 200 implements at least one bonus. A bonus may be a mystery jackpot, progressive jackpot, initiation of a special feature game that has a high return to player or another enhanced gaming event or characteristic. The bonus is implemented primarily using 971718M 1 (l HMntters PRR778 AL S NICK 71/07/1S - 8 the gaming machines and one or both of the jackpot servers 207, 215. Each of the jackpot servers 207, 215 may implement separate bonuses, with the jackpot server 207 implementing a bonus that can be won by one of the gaming terminals 202 and the jackpot server 215 implementing a bonus that can be won by any one of the gaming terminals 202 and other 5 gaming machines that form part of another gaming system 200 and that are in communication with the jackpot server 215, either directly or indirectly. Figures 5A and 5B show a flow diagram of an example process to be completed by the gaming system 200 to award a bonus. The steps performed by a gaming terminal 202 are io located to the left of Figure 5 and the steps performed by a jackpot server 207, 215 are located to the right of Figure 5. For the purposes of illustration, it is assumed that both of the jackpot servers 207, 215 maintain one or more separate bonuses in the form of jackpots. However, in alternative implementations only one of the jackpot servers 207, 215 may maintain a jackpot, or further jackpot servers may be provided. 15 Figures 5A and 5B shows a process if a "Mystery Jackpot" is implemented by the gaming system 200. A Mystery Jackpot is of the type where a random number is selected as a trigger threshold and when a monitored value, typically the collective coin-in from the gaming machines eligible to win the Mystery Jackpot reaches the trigger threshold, the jackpot is 20 awarded. However, those skilled in the relevant arts will appreciate that alternative bonus award trigger events may be used, for example at a randomly selected time within a bonus time window, in which case it may not be necessary for the coin-in of the gaming terminals 202 to be monitored. 25 The process starts at steps 50 and 70. In step 50, a gaming terminal 202 displays play of a game to a player. The gaming terminal 202 may control the game play, or the game play may be controlled centrally at the game server 205, in which case the gaming terminal 202 may control the images displayed on its display. During play of the game, a player makes wagers and the game machine captures this information and in step 51 sends a message to one or 30 both of the jackpot servers 207, 215. This allows the jackpot servers 207, 215 to award a bonus based on the turnover of the gaming terminals 202 and any other gaming machines that jackpot servers 207, 215 manage a bonus for. In step 70, the jackpot servers 207, 215 set their respective mystery jackpot trigger amounts 35 and initial values for any jackpots that have just been awarded or are new. Because the server 207 is maintaining a jackpot for fewer gaming machines than the server 215, it may have a correspondingly smaller possible range of values for the jackpot trigger and 971718fl 1 ((-HMntters PRR778 AL S NICK 71/07/1S - 9 a smaller initial value. With each coin-in message received from a gaming terminal 202 (step 71), the value of the actual jackpot is increased (step 72), by incrementing a counter maintained at the jackpot server 207, 215. 5 While the gaming terminals 202 may each send coin-in messages onto the network 201 which are detected by the jackpot server 207 and forwarded by the network 201 to the jackpot server 215 for each coin-in event, the coin-in events may alternatively be batched. For example, each gaming terminal 202 may send a coin-in message only for every tenth actual coin-in. In addition or instead, the jackpot server 207 may collect coin-in signals both for itself and for the 10 jackpot server 215 and then send a coin-in message to the jackpot server 215 for every hundredth coin-in message received from a gaming machine. In some implementations, bank controllers or concentrators (not shown) for groups of gaming machines may receive data for a plurality of gaming machines and forward this to the jackpot server 207 and/or jackpot server 205. The gaming system 200 may optionally switch from batch to continuous coin-in 15 messages once the mystery jackpot event is close, which may be indicated to the gaming system 200 by an appropriate message transmitted by the jackpot server 207, 215 over the network 201. The jackpot server 207, 215 compares the current jackpot value with the mystery amount 20 selected in step 70 (step 73) and based on the comparison a decision is made (step 74). If the mystery amount has not been reached, the process returns to step 71. If the mystery amount has been reached, then the gaming system proceeds to step 75. In step 75, the jackpot server 207, 215 randomly selects a gaming machine from a list of 25 gaming machines that are eligible to win the jackpot. For the jackpot server 207 the eligible gaming machines may be all of the gaming terminals 202, whereas the eligible gaming machines for the jackpot server 215 will also include other gaming machines. The jackpot server 207, 215 then transmits a token that is addressed to the selected gaming machine onto the network 201 (step 76). The jackpot server 207 can do this directly, but the server 215 must 30 send the token as part of a message formatted using the transport protocol of the network 212, which may then be parsed and the token transmitted on the network 201. In an alternative embodiment, the jackpot server 215 may in step 75 select a gaming system instead of an individual gaming machine in a gaming system. The selection of the individual 35 gaming machine may then be performed by a jackpot server in the gaming system 200. For example, if the jackpot server 215 selected the gaming system 200, it would send a token to the gaming system 200, which is received by the jackpot server 207. The jackpot server 207 would then randomly select a gaming terminal 202 and transmit onto the network 201 a token 971718M 1 (l HMntters PRR778 AL S NICK 71/07/1S - 10 addressed to the selected gaming terminal 202. In this alternative embodiment, the jackpot server 215, which could potentially manage a jackpot for hundreds or even thousands of gaming machines need not maintain a list of every single gaming machine. For the purposes of explanation, it is assumed that the randomly selected gaming machine Is one of the gaming 5 terminals 202, although as explained herein, at least jackpot server 215 is not restricted to selecting one of the gaming terminals 202. The selected gaming terminal 202 receives the token (step 52) and then checks if it is currently being played (step 53). If the gaming machine not currently being played, then the gaming machine sends a message back to the jackpot server 207, 215 (whichever one sent the token to it) that indicates to the jackpot server 207, 10 215 that the gaming terminal 202 is not currently being played (step 54). The jackpot server 207, 215 receives the message (step 77) and then returns to step 75 to select another gaming machine. The gaming terminal 202 may determine that it is not being played in a number of ways. One is example of when a gaming terminal 202 will return a message indicating that it is not being played may be when the gaming machine has a zero balance in its credit meter and has not had a positive balance in the credit meter in the last 5 seconds. If the gaming terminal 202 determines in step 53 that the game is being played, it then sends a 20 message back to the server 207, 215 indicating this and preferably locks up, so that the player can not continue play of the gaming terminal 202 (step 55). The gaming terminal 202 may display a message to the player informing them that they have won a prize and requesting that the player await notification of the prize amount. 25 The jackpot server 207, 215 receives the message from the gaming terminal 202 (step 78) and then determines the amount of the jackpot to award (step 79). The jackpot may optionally have continued to increase up to this point on the receipt of coin-in messages at the jackpot server 207, 215, or alternatively may have frozen once the mystery amount was won, with the subsequent coin-in messages causing an increase in another jackpot to be awarded at a later 30 time. The jackpot server 207, 215 then sends a message to the gaming terminal 202 that contains data indicating the amount of the jackpot that has been won (step 80). The gaming terminal 202 receives the message (step 56) and causes the jackpot to be awarded (step 57), for example by increasing a credit meter, printing a ticket or calling for an attendant. The gaming terminal 202 also sends an acknowledgement to the jackpot server 207, 215 (step 58), 35 which is received by the jackpot server 207, 215 (step 81) and in response the jackpot is reset to its initial value (step 82) and any coin-in messages that were received in the interim between steps 79 and 82 may be added to the initial value. The process then returns to step 70. 971718M 1 (l HMntters PRR778 AL S NICK 71/07/1S - 11 In one embodiment of the present invention, step 75 involves selecting a single gaming machine from all of the gaming machines that contribute to the jackpot that is due to be awarded. In an alternative embodiment, the selection is made from a subset of these gaming 5 machines. For example, in the gaming system 200, the gaming terminals 202 may be separated into groups. If a coin-in message from a gaming terminal 202 in a particular group causes the jackpot to reach the mystery amount, then the step 75 may involve randomly selecting one of the gaming terminals 202 in that particular group. A display 204 associated with a the particular group and/or a display on each gaming terminal 202 in the group may 10 optionally announce that one of the gaming machines 204 is about to win a jackpot immediately prior to the completion of the selection and awarding process. In another example, the selection may be made from a list of gaming machines that have contributed to the jackpot recently, perhaps in the last 10 seconds or alternatively since the mystery amount was reached. If the latter option is used, then step 75 may be delayed to allow a pool of 15 eligible machines to be formed. In this embodiment of the invention it is of course more likely that the gaming machine that is selected will be being played when it receives the token. Figures 5A and 5B show a currently preferred form of the present invention in which the award of a jackpot is performed in two stages, namely sending a token (step 76) to find the winning 20 gaming machine and then notifying the gaming machine of the amount won (step 80). Alternatively, the token may also notify the gaming machine of the amount won, in which case the first gaming machine that is being played that receives the token can immediately notify the player of the amount won. However, a disadvantage of this method is that when a gaming machine receives a token it has not yet been established that two way communication 25 between the jackpot server 207, 215 and the gaming machine that received the token has been established. If the gaming machine can not acknowledge receipt of the token, then difficulties may arise in avoiding duplicate award of the same jackpot. Figures 6A and 6B show a flow diagram of a process according to another aspect of the 30 present invention. Again, steps performed by a gaming machine are located to the left and steps performed by the jackpot server 207, 215 are located to the right. Many of the steps in Figure 6 are identical or similar to the steps performed in the process described previously with reference to Figure 5 and these steps are numbered with the same reference numerals. 35 The gaming terminals 202 operate in the same way, to play a game and send coin-in messages to the jackpot server 207 or jackpot server 215. The coin-in messages include a unique gaming machine identifier (ID) of the sending gaming machine and a unique player identifier (ID) of the player at the gaming machine that sent the coin-in message. The player ID 971718fl 1 ((-HMntters PRR778 AL S NICK 71/07/1S - 12 may be determined by the gaming machine from a smart card, magnetic swipe card or other information carrier that is inserted into or otherwise read by an appropriate reader of the gaming machine, or may be information entered using a user interface of the gaming machine or otherwise. When the mystery jackpot amount is exceeded, the jackpot server 207, 215 in 5 step 90 records the player ID in memory. Instead of randomly selecting a gaming machine, in the process shown in Figure 6 the jackpot server sends a token to the gaming machine that is identified by the gaming machine ID in the coin-in message that caused the jackpot to exceed the mystery amount. This may be achieved 10 by looking up the gaming machine ID in a look-up table to find the address of the gaming machine, or the coin-in message may contain the network address. If after sending the token in step 76, the gaming terminal 202 responds that it is still being played by the same player, then steps 78 to 80 at the jackpot server 207, 215 and steps 56 to 58 at the gaming terminal 202 proceed as for the process shown in Figure 5. 15 If the player is no longer playing the gaming machine, the previously recorded player ID and the jackpot amount are stored (step 91). The jackpot server 207, 215 may monitor coin-in messages from that gaming machine, other gaming machines and optionally also other devices that it is in communication with for the stored player ID and perform step 76 if the 20 player ID is detected, sending a token to the gaming machine to ensure that the player has not left and attempting again to award the jackpot. If the jackpot has not been awarded within a time limit, as determined in decision step 93, an expired jackpot action (step 94) is taken. Step 94 may involve looking up the player details in a database and mailing notification of the win to the player or otherwise attempting to contact the player, distributing the win to players of 25 gaming machines that were eligible to win the unclaimed jackpot as described in more detail herein below, or some other action. In an alternative embodiment, the coin-in messages may be associated with a player ID without the player ID accompanying each message. For example, a gaming machine may 30 communicate the player identifier when it is provided and communicate when the player leaves the gaming machine. In this embodiment the jackpot server 207, 215 has all the information required to associate the coin-in messages with the player ID. In another aspect of the present invention, awarding a jackpot may involve distributing the 35 jackpot amongst eligible gaming machines. The award process may take place over a period of time, the only limit being that the balance of the jackpot generally decreases over time during an award event. For example, a jackpot of $100,000 may be separated into ten $10,000 971718M 1 (l HMntters PRR778 AL S NICK 71/07/1S - 13 jackpots, each jackpot being awarded in intervals of 15 minutes, so that the jackpot awarding process takes two and half hours. In this aspect of the invention, steps 75 to 82 shown in Figure 5 may be repeated multiple 5 times by the jackpot server 207, 215 for a single jackpot, the jackpot being effectively sub divided into a number of smaller sub-jackpots, each being awarded individually to a randomly selected gaming terminal 202. Again, the selection may be made from all gaming machines that contributed to the jackpot, or a sub-set of gaming machines that are determined to be eligible, for example due to being played recently. In one embodiment, the process may 1o further involve checking that the same identified player is playing the gaming terminal as when that gaming terminal was selected, using a process described in relation to steps 53-58 and 77 to 94 of Figures 6A and 6B. Table 1 shows an exemplary header of a packet that may be sent by the jackpot server 207 to 15 the machine communication interface of a gaming machine, which may be the network card 112 described previously herein. The header contains three fields, a "cmd" field, a "id" field and a "anetAddr" field. The "cmd" field identifies the message to the network as a command, specifically a jackpot token, the "id" field identifies the jackpot server 215 that sent the packet and the "anetAddr" field contains the network address of the destination gaming machine. The 20 "id" and "anetAddr" fields are used by the network to route the packet to the destination gaming machine. Table 1 - header of a token <head> Format Value Description Tag cmd Number 40 Send Jackpot Token. id Number Identifier of originating jackpot server. anetAddr Number Identifier of the destination gaming machine on the gaming floor. 25 Table 2 shows an exemplary body of a token packet, which also includes three fields. The "cmd" field identifies the packet as a jackpot token to the destination gaming machine, the "tokenld" field provides the gaming machine with the identifier of the token, the identifier having been generated by the jackpot server 215 prior to sending the token, and the 30 "accept|D" field specifies to the gaming machine which algorithm to use to process the token. For example, one "accept|D" value may specify that the process of Figure 5 is to be implemented and another may specify that the process of Figure 6 is to be implemented. There may be several variations of algorithms on or available to each gaming machine, with the jackpot server 215 specifying which one to use in the token. 35 971718M 1 (l HMntters PRR778 AL S NICK 71/07/1S - 14 Table 2 - body of a token <body> Format Value Description Tag cmd Number 1 Send Jackpot Token to EGM. tokenld Number Token Identifier. accepted Number Identifier of the algorithm to use to I I_ I process the token. 5 Table 3 shows an exemplary header of a response message from a gaming machine to a token. The response message may be sent as part of step 54 or step 55 of the processes shown in Figures 5 and 6. The header includes the same fields as the header of the token, the only difference being that 10 the destination address is now the network address of the jackpot controller and the source address is the network address of the gaming machine. Table 3 - header of a response message <head> Format Value Description Tag cmd Number 40 Send Jackpot Token. id Number Identifier of the destination jackpot server. anetAddr Number Identifier of source gaming machine. 15 Table 4 shows an exemplary body of a response message, which includes four fields. The "cmd" and "tokenld" fields identify to the jackpot server that the message is a response message to a token and the specific token that message relates to respectively. The "acceptStatus" field indicates to the jackpot server whether the gaming machine has accepted 20 the token, or rejected it, and the "rejectReason" field provides the reason for rejection, if any. The "rejectReason" field will contain: - A "0" if the "acceptStatus" filed is a "1"; - A "1" if the gaming machine is already locked up awaiting further action following a 25 previous acceptance of a token with the same identifier (which may occur, for example, if a previous response message was not received by the jackpot server for some reason and therefore the jackpot server retransmitted the token); - A "2" if the gaming machine is not in play as determined by the gaming machine and the "accept|D" of the token specified that the gaming machine should use its own 30 algorithm to determine whether it is in play; - A "3" if the gaming machine is not in play and the "accept|D" of the token specified that the gaming machine should report the duration that the machine has remained 971718M 1 ((-HMntters PRR778 AL S NICK 71/07/1S - 15 unplayed, which allows the jackpot controller to take varying action depending on the reported duration; - A "4" if an identified player is not currently playing the gaming machine, which may be useful where a jackpot is only available to players who have identified themselves. 5 Table 4- body of a response message <body> Format Value Description Tag cmd Number 1 Send Jackpot Token to EGM tokenld Number Token ID acceptStatus Number Acceptance result. o =No acceptance of token, rejection 1 = Accept Token rejectReason Number Rejection Reason. o = no reject reason 1 = already in a jackpot hit for this jackpot ID 2 = EGM not in play 3 = EGM not in play for N seconds 4 = No player identifier available Exemplary XML code for sending a token is: 10 <msg> <head> <cmd>40</cmd> <id>2</id> 15 <anetAddr>12</anetAddr> </head> <body> <cmd>l</cmd> <tokenl d>1234456789</tokenl d> 20 <acceptld>2</acceptld> </body> </msg> 25 Exemplary XML code for sending a response message is: <msg> <head> <cmd:>40</cmd> 30 <id>2</id> <anetAddr> 1 2</anetAddr> </head> <body> <cmd>1</cmd> 35 <tokenld>1234456789</tokenld> <acceptStatus> 1 ></acceptStatus> <rejectReason>O</rejectReason> </body> </msg> 971718M 1 ((-HMntters) PRR778 AL S NICK 71/07/1S - 16 If a token is sent by the jackpot server 215, then the message will be contained within a message suitable for transmission over the network 212, for example using TCP/IP if the network 212 includes the Internet. 5 While the foregoing description has been provided by way of example of the preferred embodiments of the present invention as presently contemplated, which utilise gaming apparatus and machines, those skilled in the relevant arts will appreciate that the present invention also may have application to internet gaming and/or have application to gaming over 10 a telecommunications network, where handsets are used to display game outcomes and receive player inputs. Where in the foregoing description reference has been made to integers having known equivalents, then those equivalents are hereby incorporated herein as if individually set forth. 15 Those skilled in the relevant arts will appreciate that modifications and additions to the embodiments of the present invention may be made without departing from the scope of the present invention. 20 It will be understood that the invention disclosed and defined in this specification extends to all alternative combinations of two or more of the individual features mentioned or evident from the text or drawings. All of these different combinations constitute various alternative aspects of the invention. 25 It will also be understood that the term "comprises" (or its grammatical variants) as used in this specification is equivalent to the term "includes" and should not be taken as excluding the presence of other elements or features. 971718M 1 ((-HMntters PRR778 AL S NICK 71/07/1S

Claims (12)

1. A bonus controller for controlling the award of a bonus at one of a plurality of gaming terminals in communication with the bonus controller via a data network, the bonus controller 5 comprising a communication interface and a memory storing a definition of a trigger event, the bonus controller being arranged to: receive at the communication interface data sent by a respective ones of the gaming terminals, the data comprising data defining a player identifier of the respective gaming terminal and data related to play of a game on the respective gaming terminal; 10 determine an occurrence of a trigger event attributable to a selected one of the gaming terminals based on the data related to play of the game on the respective gaming terminal; upon determining that the occurrence of the trigger event is attributable to the selected gaming terminal: send a token via the communication interface a to the selected gaming 15 terminal with a token and awaiting a response from the selected gaming terminal; check that the selected gaming terminal is being played by the same player identified by the player identifier; and subsequent to receiving the response from the gaming terminal: a) upon determining that the same identified player is 20 playing the gaming terminal, cause the immediate award of a bonus at the gaming terminal; or b) upon determining that the identified player is not playing the gaming terminal, store data defining the bonus and the player identifier to enable the subsequent award of the bonus to the identified player. 25

2. The controller of claim 1, wherein when the controller stores data defining a bonus and the player identifier received from the gaming machine, it subsequently monitors for receipt at the communication interface of data defining that player identifier, identifies from that data the gaming machine that generated the data, and in response communicates information relating to the bonus to the identified gaming machine. 30

3. The controller of claim 2, wherein the information relating to the bonus comprises data defining the bonus so as to allow the identified gaming machine to award the bonus.

4. The controller of claim 3, wherein the bonus is a progressive jackpot and following 35 communication of information relating to the bonus to the identified gaming machine, the controller awaits acknowledgement from the gaming machine that the bonus has been awarded and then one of resets and reduces the value of the progressive jackpot. 971718M 1 (l HMntters PRR778 AL S NICK 71/07/1S - 18 5. The controller of any one of claims 1 to 4, wherein when the controller stores details of a bonus and the player identifier received from the first gaming machine, it subsequently outputs information of use in sending a notification to the player identified by the player identifier that he or she has won a bonus.

5

6. The controller of claim 5, wherein the information of use in sending a notification to the player is only output if a certain period of time has elapsed since the details of a bonus and the player identifier received from the gaming machine were stored and the controller has not, prior to expiration of the certain period, caused the award of the bonus. 10

7. A method of controlling the award of a bonus at one of a plurality of gaming terminals in communication with a bonus controller via a data network, the bonus controller comprising a communication interface and a memory storing a definition of a trigger event, the bonus controller being arranged to: 15 receiving at the communication interface data sent by a respective ones of the gaming terminals, the data comprising data defining a player identifier of the respective gaming terminal and data related to play of a game on the respective gaming terminal; determining an occurrence of a trigger event attributable to a selected one of the gaming terminals based on the data related to play of the game on the respective gaming 20 terminal; upon determining that the occurrence of the trigger event is attributable to the selected gaming terminal: sending a token via the communication interface a to the selected gaming terminal with a token and awaiting a response from the selected gaming 25 terminal; checking that the selected gaming terminal is being played by the same player identified by the player identifier; and subsequent to receiving the response from the gaming terminal: a) upon determining that the same identified player is 30 playing the gaming terminal, causing the immediate award of a bonus at the gaming terminal; or b) upon determining that the identified player is not playing the gaming terminal, storing data defining the bonus and the player identifier to enable the subsequent award of the bonus to the identified player. 35

8. The method of claim 7, comprising storing data defining a bonus and the player identifier received from the gaming machine, subsequently monitoring for receipt at the communication interface of data defining that player identifier, identifying from that data the 971718M 1 (l HMntters PRR778 AL S NICK 71/07/1S - 19 gaming machine that generated the data, and in response communicating information relating to the bonus to the identified gaming machine.

9. The method of claim 8, wherein the information relating to the bonus comprises data 5 defining the bonus so as to allow the identified gaming machine to award the bonus.

10. The method of claim 9, wherein the bonus is a progressive jackpot and following communication of information relating to the bonus to the identified gaming machine, awaiting acknowledgement from the gaming machine that the bonus has been awarded, and then one 10 of resetting and reducing the value of the progressive jackpot.

11. The method of any one of claims 7 to 10, comprising outputting information to the player identified by the player identifier that he or she has won a bonus after storing details of the bonus and the player identifier received from the first gaming machine comprising 15 outputting information to the player identified by the player identifier that he or she has won a bonus.

12. The method of claim 11, comprising outputting the information to the player identified by the player identifier only if a certain period of time has elapsed since the details of the 20 bonus and the player identifier are received from the gaming machine were stored, and the controller has not, prior to expiration of the certain period, caused the award of the bonus. 971718M 1 ((-HMntters PRR778 AL S NICK 71/07/1S