KR20010052732A - Channelization and encoding for text information services transmitted via radiocommunication systems - Google Patents

Abstract

The present invention discloses a technique for channelizing and encoding various broadcast information services, for example, using a broadcast control channel that provides information to a mobile station user. The mobile station may be a receive-only device similar to a simple pager, or it may be a receive / transmit device, such as a mobile phone. For example, it provides efficient encoding and channelization techniques to limit the capacity of broadcast channels consumed by security ticketing services. The method includes separating the short message broadcast control channel into three logical subchannel: security name channel, start value channel and delta channel. These channels provide various types of security information to the mobile station. The present invention modifies the bandwidth allocation of these individual channels to provide a very large amount of security information while maintaining a high cycle time.

Description

CHANNELIZATION AND ENCODING FOR TEXT INFORMATION SERVICES TRANSMITTED VIA RADIOCOMMUNICATION SYSTEMS < RTI ID = 0.0 > [0001] < / RTI >

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates generally to providing information services in a wireless communication system, and more particularly, to encoding and transmitting data for broadcast transmission over an air interface to efficiently provide a broadcast information service in connection with existing wireless communication services and systems. Channelization.

Commercial wireless communications have grown rapidly over the past 15 years. In particular, phasers and cellular phones are becoming relatively common in many urban environments. These two different types of communication devices and support systems are developed from a cellular phone for providing two-way voice communication services to a pager and one or more terminal users for providing various basic purposes, for example, traditionally limited unidirectional information come.

As technology advances, the typical function splitting line between two different types of wireless communication devices is not clear. The pager acquires the function typically provided by the cellular phone and vice versa. For example, a bi-directional pager has been developed that allows a pager user to send a message to the paging system and then forward the message to the other party. Similarly, a cellular phone acquires the ability to send and receive short messages (e.g., about 160 alphanumeric characters) text messages that can be output on a display of a cellular phone. The development of such wireless communication devices leads to the development and marketing of a host of new information services.

For example, we have developed a paging system that provides a broadcast of an information service, for example, a ticker information service, to a large number of subscribers with a display-equipped pager. These pagers periodically receive information related to financial instruments such as securities, other options, futures, etc. through the air interface and display the current values of these instruments so that users can track their portfolio performance.

Applicants have noted that users of cellular phones are interested in providing similar services that provide information service support in a cellular network. However, conventionally, a cellular system, unlike a paging system, has only a relatively small bandwidth for point-to-multipoint transmission from a broadcast, i. E. System to a cellular phone operating in the system, Limitations of bandwidth due to the confinement of multiple control mechanisms, for example, the spectrum allocated by the FCC; (2) most limited bandwidth for point-to-point connections (eg, voice connections) between cellular phones and systems It was designed in relation to the legend of the view that Due to the latter features of these cellular systems, system designers have been very concerned about the amount of information transmitted over the available broadcast channels and how often this information is repeated. Thus, providing a broadcast information service to a cellular wireless communication system can not be easily accomplished in the most direct way of simply broadcasting any information that any subscriber wants to display on their cellular phone.

For example, consider a TDMA cellular radiotelephone system in which each radio frequency is divided into a series of time slots, each of which includes a burst of information from a data source, e. G., Digitally encoded voice conversion. The bursts associated with multiple sources may be time multiplexed to support one or more channels at each radio frequency. The time slots are grouped into consecutive TDMA frames having a predetermined period. The number of timeslots of each TDMA frame is related to the number of users that can simultaneously share a wireless channel. If each slot of a TDMA frame is assigned to several users, the duration of the TDMA frame is the minimum time between consecutive timeslots assigned to the same user.

A continuous time slot assigned to the same user, rather than a continuous time slot, typically on the wireless carrier, constitutes the user's digital traffic channel (DTC). As described above, this is typically a point-to-point resource, and in fact, most TDMA systems have the majority of the available radio channels for use as DTCs, ensuring a large amount of traffic capacity. However, as will be described in greater detail below, the digital control channels (DCCHs) are also provided for communicating control signals and overhead information, including a mechanism for connecting to a wireless communication system, to which the DTC is assigned.

Similar types of resource allocation can be seen in other types of cellular systems. For example, in a code division multiple access (CDMA) system, channelization is performed with spreading data associated with a particular connection using a unique spreading code. This code provides a mechanism for extracting the extended data to the receiver by correlating the received composite signal with the code assigned to that traffic channel, as opposed to or in comparison with the frequency and time differentiators. A CDMA system may assign a known code thereto, such as a TDMA system, to provide a broadcast control channel or other overhead signaling channel. However, CDMA systems, like TDMA systems, tend to have more resources (e.g., code and power) for dedicated traffic channels than broadcast information channels.

Accordingly, it is desirable to provide a technology and system that can provide broadcast information services within the limits of existing cellular radio communication systems. In particular, it is desirable to design broadcast information technology and systems to accommodate terminal user needs for a relatively large amount of data that needs to be updated relatively frequently while minimizing the use of unused little broadcast channel resources.

SUMMARY OF THE INVENTION [

An embodiment of the present invention provides a technique for supporting broadcast information service through a wireless communication system by efficiently utilizing broadcast resources. A device of the terminal user, for example a mobile station, may be a receive only device similar to a simple pager, or a receive / transmit device such as a mobile phone. The present invention provides efficient encoding and channelization of transmitted information to minimize the amount of broadcast resources consumed by the broadcast information service.

According to an embodiment of the present invention, the broadcast information service may be a security ticketing service provided in an IS-136 compatible system having a short message service (SMS) capacity. A part of the broadcast control channel held in the IS-136 for SMS may further be divided into a plurality of logical sub-channels to carry various parts of data used to implement the security ticketing service. More particularly, these exemplary subchannels may include a security name channel, a start value channel, and a delta channel.

These channels convey various types of security information to mobile stations. By modifying the bandwidth allocation of these individual logical subchannels, the present invention can provide information related to multiple securities while maintaining a fast refresh rate (cycle time).

Another embodiment of the present invention provides a technique for channelizing and coding information related to a sports score to allow efficient transmission through broadcast resources of a wireless communication system. The present invention can be generalized to any set of information to be transmitted.

The above objects and features of the present invention will become more apparent from the following description of preferred embodiments with reference to the accompanying drawings.

Figure 1 is a general view of a digital control channel (DCCH) with time slots grouped into superframes.

2 is a diagram showing an example of a wireless telephone system in which the present invention can be implemented.

Figure 3 is a diagram illustrating a hyperframe structure that may be used to implement the present invention.

4 is a diagram illustrating a logical channel of a DCCH that may be used to implement the present invention.

Figures 5-7 illustrate another example logical channel subdivision used to broadcast information associated with a security ticketing service in accordance with the present invention.

8 and 9 are diagrams illustrating general channelization and coding techniques according to the present invention.

The following description has been made with reference to a cellular radiotelephone system, but the invention is not so limited. Further, although the following description has been described in the context of an IS-136 compliant TDMA cellular communication system, it will be appreciated by those skilled in the art that the present invention may be implemented in accordance with other standards, e.g. GSM or PDC, It will be appreciated that the invention may be implemented in digital communication applications, including those using CDMA, for example, IS-95.

In particular, embodiments of the present invention describe techniques and systems for providing a broadcast information service to minimize the use of relatively infrequent broadcast resources used in existing cellular wireless communications systems. Thus, these systems are described using IS-136, particularly broadcast resources available for the Broadcast SMS channel (S-BCCH). In general, detailed descriptions related to the IS-136 system and especially the broadcast SMS channel will be described later, while others are omitted in order to avoid obscuring the present invention. However, those of ordinary skill in the art will appreciate that U.S. Patent No. 5,603,081 to Wrays et al. And U.S. Patent Application Serial No. 08 / 482,754. The disclosures of both this US patent and US application are hereby incorporated by reference.

1 shows a general example of a forward (or downlink) DCCH consisting of consecutive time slots 1, 2, ..., N, ... included in consecutive time slots 1, 2, . These DCCH slots are formed on a radio channel as specified by IS-136, and may consist of every nth slot of a series of consecutive slots, for example as shown in FIG. Each DCCH slot has a duration that may or may not be 6.67 msec, which is the length of the DTC slot according to the IS-136 standard.

As shown in FIG. 1, the DCCH slots are structured in a superframe (SF), and each superframe includes a plurality of logic channels for carrying various kinds of information. One or more DCCH slots may be assigned to each logic channel of the superframe. The exemplary downlink superframe of FIG. 1 includes a broadcast control channel (BCCH) comprising three logical channels: six consecutive slots for overhead messages; A paging channel (PCH) comprising one slot for a paging message; And an access response channel (ARCH) including one slot for channel assignment and other messages. The remaining timeslots in the example superframe may be dedicated to other logic channels such as the additional paging channel PCH. Since the number of mobile stations is usually greater than the number of slots in the superframe, each paging slot is used to page several mobile stations sharing some unique characteristic, e.g., the last digit of MIN.

2 shows a block diagram of a cellular mobile radiotelephone system example including an exemplary base station 110 and a mobile station 120. [ The base station includes a control and processing unit 130 connected to the MSC 140 and then connected to a PSTN (not shown). This general form of cellular radiotelephone system is described in U.S. Patent No. 5,175,867 to Wejke et al., Entitled " Proximity Aid Handoff in a Cellular Communication System " and in U.S. Patent Application No. 07 / 967,027 entitled " Are also known, both of which are incorporated herein by reference.

Base station 110 handles a plurality of voice channels by voice channel transceiver 150 controlled by control and processing unit 130. Each base station also includes a control channel transceiver 160 that can handle one or more control channels. The control channel transceiver 160 is controlled by the control and processing unit 130. The control channel transceiver 160 broadcasts control information to a mobile station fixed to the control channel through a control channel of a base station or a cell. Transceivers 150 and 160 may be implemented as a single device, such as voice and control channel transceiver 170, for use with DCCH and DTCs that share the same radio carrier frequency.

The mobile station 120 receives the information broadcast on the control channel at its voice and control channel transceiver 170. Next, the processing unit 175 evaluates the reception control channel information including the characteristics of the cell as the mobile station candidate to be fixed, and determines to which cell the mobile station is fixed. As described in U.S. Patent No. 5,353,332, entitled " Method and Apparatus for Communication Control of a Wireless Telephone System ", the received control channel information includes absolute information related to which cell is associated, And relative information related to other cells in the vicinity of the cell concerned.

The mobile station 120 includes an input device 185, such as a numeric keypad, that allows the user to interact with the mobile station. A display device 190, such as an LCD screen, provides visual information to the user. The mobile station also includes a memory 180.

In an embodiment of the present invention, the transmission of broadcast information from a base station to a mobile station consists of several different types of logical frames. Figure 3 shows the frame structure of the forward (base station to mobile) DCCH according to IS-36 and shows two consecutive hyperframes (HF), each of which consists of each primary superframe (SF) and each secondary superframe . Of course, it will be appreciated that a hyperframe may include more than two superframes.

Three consecutive superframes are shown in FIG. 3, each of which includes a plurality of timeslots organized into logical channels F-BCCH, E-BCCH, S-BCCH and SPACH, as described in more detail below. At this point, each superframe of the forward DCCH includes a full set of F-BCCH information (i. E., A set of Layer 3 messages) using as many slots as necessary, and each superframe starts with an F- . The remaining slots in each superframe after the F-BCCH slots or slots include one or more slots for the E-BCCH, S-BCCH and SPACH logic channels (or none at all).

Referring to FIG. 3 and more particularly FIG. 4, each superframe of the downlink (forward) DCCH preferably includes a broadcast control channel BCCH and a short message-service / paging / access channel SPACH. The BCCH is a fast BCCH (F-BCCH shown in FIG. 3); Extended BCCH (E-BCCH); And Short Message Service BCCH (S-BCCH), some of which are typically used to transport general system related information from the base station to the mobile station.

The F-BCCH logical channel may include other system parameters, such as the structure of the DCCH, other parameters necessary for accessing the system, and the E-BCCH change flag described in more detail in U.S. Patent Application Serial No. 08 / 482,754, Transport; As mentioned above, a complete set of F-BCCH information is transmitted in all superframes. The E-BCCH logical channel carries system information that is less timely than the information sent on the F-BCCH; The complete set of E-BCCH information (i. E., A set of Layer 3 messages) does not need to be allocated to start in the first E-BCCH slot of the superframe because it rotates several superframes. The S-BCCH logic channel conveys short message broadcasts such as stock information, advertisements, and information of interest to the mobile subscriber of various layers. According to an embodiment of the present invention, this logical channel may be used to support an information service, for example, a ticker service or a sports information service.

<Examples of securities ticketing service>

When deciding how to efficiently use existing broadcast resources to support new information services, for example, ticker ticketing services, it is important to first determine what type of information needs to be broadcast, the amount of information involved and how often It is important to decide whether or not to retransmit the information. For example, securities information transmitted as part of a broadcast ticketing service may include a security symbol, a security name, a base trading value associated with each symbol (i.e., the closing price of the previous day), and a default value It is preferable to include a value indicating increment or decrement. Depending on the length of the security symbol and the number of digits used to indicate the corresponding value, the jail set number needed to be sent per entry may be as high as 20. With 8 bits per character, the total number of bits is almost 160 bits. With some restrictions on the transport format, the amount of data needed can be eliminated with a small set of jokes. However, such a formatting requirement may impose undesirable restrictions, such as requiring that a security symbol not end in a digit. These limits may not be compatible with current or future security symbol transmission formats.

Applying restrictions to the transport format reduces the amount of data that needs to be transmitted; This system still requires a relatively large amount of data per symbol of the security to be transferred. In an embodiment of the present invention, the S-BCCH logical channel includes at least three logical sub-channels supporting this broadcast information service: a security name channel, a start value channel and a delta channel as shown in FIG. Those skilled in the art can be divided into three or more subchannels without departing from the spirit and scope of the present invention; It will be appreciated that other SMS activities are in fact supported by multiple logic sub-channels. For example, as described in the aforementioned U.S. Patent Application Serial No. 08 / 482,754, an S-BCCH may be divided into n (e.g., 32) sub-channels that support multiple broadcast services, service levels, . One or more of these subchannels (as shown in FIG. 6) (as shown in FIG. 7) may be logically further subdivided to include the three subchannels described herein.

The securities name subchannel may include information that allows the mobile station to map the received symbol, e.g., a start value or a received symbol, sent to the security name on the delta channel, to indicate it more easily in a mobile station have. The mapping information is read from the securities name subchannel and stored in the mobile station for future use. For example, the security name subchannel may include a symbol string, e.g., " ERICY " followed by a corresponding security name, e.g., " ERICSSON. &Quot; The mobile station may store this mapping. If the start value or delta channel contains the symbol " ERICY ", the mobile station can view the memory and mark it as " ERICSSON " with the current stock value on the display of the mobile station.

The securities name subchannel may be associated with this mapping information in an information service provider (e.g., an identifier of the type of information and / or the format of the information provided on the start value and / or delta channel, (E.g., 8 bits) change flag CF indicating whether the mobile station should read the remaining information that is broadcast on this subchannel for the purpose of updating the stored information, can do. The CF may be specific to a particular system operator mode (SOC), a specific area code, or both, and may also convey the characteristics of the change flags. The interpretation of the CF by the mobile station may be controlled by over-the-air programming, for example the OATS of IS-136, or may be transmitted on the delta channel.

The CF may be implemented as a date value to determine whether an update of the information broadcast on the securities name channel is required. By using the dates of CF, a mobile station moving between service providers does not need to iteratively update this information supplied by several providers. The mobile station only changes the stored data if CF indicates a more recent date than the data is stored.

As described above, the content of the securities name channel includes mapping of the security information (which does not change frequently) of the security symbol and the encoding information to a popular or legal name. As a result, the number of changes to the information broadcast on this channel is very small, which allows embodiments of the present invention to allocate relatively little bandwidth to the transmission of this subchannel. Furthermore, the bandwidth allocation can be modified based on, for example, the time described below.

The information broadcast on the securities name channel requires relatively uncommon updates, so there is little concern for scenarios with mobile stations moving between service providers. If one service provider sends significantly more sets of securities than another service provider, it can affect the other two channels (ie, the delta and start value channel). If a service provider is sending a symbol for which the mobile station does not store a security name, the mobile station will display the symbol to the user instead of the name. The name stored in the mobile station does not need to be deleted if it does not exist on the securities name channel broadcast by another provider; Instead, the mobile station may add a name to the stored mapping as it moves between service providers.

A more radical change in the information being broadcast is experienced when a mobile station moves from one country to the next, for example, a broadcast information service provider in France, After receiving the information to read, a list of symbols of the French securities market and a list of corresponding securities names may be broadcast. According to an embodiment of the present invention, if a plurality of country codes are detected in the overhead information broadcast from the wireless communication system, the mobile station clears the symbol-to-name mapping associated with the first country code from its memory, Will form a new symbol-to-company name code for the region code. If the mobile station generates a new symbol-to-name mapping, for example, it is recognized as receiving the old country code of the mobile station, and can be switched back to the old mapping when moving back to the previous country. This allows the mobile station to retain its country's security mapping in its memory while traveling abroad. In addition, the mobile station can learn the symbol-to-name mapping of the visited country.

The securities name channel may also provide category values. According to the present invention, this security may be subdivided into categories such as the type of company (e.g., telecommunication company), metal, money, and the like. When a change occurs in a security, it eliminates the need to reprogram the entire set of names by subdividing it into types of sublists and securities; Such subdivision is likely to require multiple CFs and type identifiers.

As described above, the mobile station may store one or more lists and associated CFs. This eliminates the need to reload the company name list when roaming between country codes or multiple service providers. Of course, those skilled in the art will appreciate that it is desirable to have a list common to a plurality of service providers in the same country, or preferably in a region covered by one common securities exchange rate, for example, Vatican and Italy.

Information carried in the securities name channel may also be transmitted in a different manner than by the S-BCCH. For example, by using a public activity service as defined in IS-136, this information can be communicated to the cellular / PCS / satellite from a web site on the Internet programmed into the mobile station via, for example, Download using data service. In these cases, updating the symbol with the name of the security may not be quick or automatic, but it reduces the use of bandwidth in the broadcast resource.

As described above, information transmitted on the security name sub-channel does not need to be updated frequently, so it is desirable that this channel can contain a relatively large amount of data. The issue when the securities name information is updated can be well understood in the context of the following example. Assume that approximately 10 octets of set (for example, 8 bit characters) are required for each security name and approximately 4 octets are required for each symbol. If overhead information is required, for example 15 octets or 120 bits, then the total number of bits required to be transmitted and read by the mobile station for the 1000 securities set is 120,000 bits. Assuming that 10% of the S-BCCH slots are allocated to the security name subchannel, it takes about 2 hours to update this information at 120,000 / (0.6 * 0.1) or cycle time. However, the user prefers that this information is updated more quickly.

One option is to increase the bandwidth used for this channel, for example, to use more than 10% S-BCCH slots to transport the security name subchannel. The other option is to not send this channel for trading days. Instead, the mobile station can use any mapping available in memory for the trading day (which means that the mobile station can be preprogrammed with the mapping between the symbol information and the security name for fast initial service utilization). The mobile station can continue to present the old (pre-stored) name until it updates the name information while reading the securities name channel after the trading day. Alternatively, instead of preprogramming the mobile station, the mobile station may simply mark the symbol name as being transmitted on the start value and / or delta channel, until the mobile station receives the security name information.

The second subchannel to be described is a start value channel. The main content of the start value subchannel is the last sale price of the day for a particular symbol. The start value channel provides the type of encoding (e.g., format) used by the service provider of this channel, the last sale date of the security, and the date the sale price becomes valid as the start value, along with the last sale price of the day do. This effective date is used to prevent the mobile station from re-reading the start-value channel during periods of inactivity (i. E., No trading period). In an embodiment of the present invention, the last sale date and the effective date may be combined; For date sensitive applications (e.g., applications that perform statistical analysis and comparison), it is desirable to transmit the actual date of the last trading day as a separate information element.

In addition to the information, the start value channel may also provide a list number, a sublist number (as needed), a security symbol (SS) entry number, and a list entry number. The list entry number may be specific to a particular list and common to all lists. It is possible to remove the transmission of the list entry number in order to reduce the amount of data to be transmitted; This value can facilitate retrieval of data in the presence of a word error when sent with the SS.

The delta channel provides a value indicating the increment or decrement from the start value of a particular symbol. The delta channel, along with the increment / decrement value, provides the type, time, list number and sublist number of the encoding used by the service provider of the information found in this channel. The list number allows the service provider to control the type of security the user is allowed to access. For example, a user may only sign a limited number of securities from the New York Stock Exchange. Similarly, with the use of a sublist number, the user can only be granted access to a particular set of lists being transmitted. For example, a user may be allowed access to a telecommunications company on NASDAQ. Each entry in the list has a list entry number assigned to it.

Many different encoding techniques or formats can be used for delta channels. The information identifying the encoding technique can also be reasonably interpreted by the mobile station because the service provider must be broadcast enough to select multiple encoding techniques. Although examples of some encoding techniques for delta channels are described herein, it will be understood by those skilled in the art that other techniques may be used and are within the scope of the present invention.

For example, symbol information, for example " ERICY ", may be transmitted on the delta channel to clearly indicate the correspondence between the security and each increment / decrement value transmitted on the delta channel. Alternatively, if it is desired, for example, to reduce the bandwidth requirement of the delta channel and / or to increase the update rate of the increment / decrement information, the symbol identification information may be completely omitted, The increment / decrement value implies the symbol identification associated therewith. If this latter option is used, overhead information that is periodically transmitted on the delta channel may include information such as a reference value (e.g., a number indicating the current position in the symbol sequence) starting at any time and reading information on the delta channel It should be provided at the start so that the mobile station is synchronized to the information.

A compromise between the two options of explicitly sending symbol values and relying only on implicit information with respect to the sequence being transmitted such that the increment / decrement value identifies the symbol is added to the increment / Quot; &lt; / RTI &gt; For example, if a total of 65,000 securities are supported by the broadcast information service, a reference number with 16 bits may be sent with each increment / decrement value. The reference number may be stored on the mobile station in advance and / or received on the securities name channel with other information as described above.

Increment / decrement symbols are sent sequentially on the delta channel starting at the beginning of the list or the sequence of the list. Assuming that the symbol reference information has not been explicitly transmitted, the content of the list can be represented, for example, by +1; 38, -11; 18, +12; 132, 1/8, and +12 1/32, respectively. The list may also include general overhead information, such as a timestamp. This exemplary format for transmitting information on a delta channel is based on the assumption that changes are represented as integer and / or fractional values. On the other hand, using a change of decimal method, it is possible to provide a representation of a decimal method or to express a change of a decimal method as a fraction having a predetermined precision loss, for example 1/8 or 1/32.

Most securities at least in the US market do not change the value by more than one digit (1-9) for the integer part of the price mark on any day. Thus, this embodiment of the invention provides 4 bits to represent the integer part of the price of each security. Furthermore, it is assumed that each fraction is quantized with increments of 1/32 so that the fractional part of the price indication can be transmitted on the delta channel using 5 bits. Next, the total number of bits per symbol transmitted on the delta channel is determined by whether each bit for the plus / minus symbol is followed by an additional integer value (e.g., when the change is greater than $ 16 for a particular security) 11, including the indicator for. When a decimal format is used, 7 bits are required in the fractional part (to represent a decimal fraction with a precision of 1/100), resulting in a total of 13 bits per symbol or security.

The previous embodiment using the delta channel concept is compared to a more honest method in which all the necessary information, including the complete securities name, the total currency value of the security, etc., is transmitted in each case. For this approach, the Applicant believes that between about 100 and 160 bits per security is needed, which drastically reduces the broadcast bandwidth achieved using the present invention. Without the channelization and encoding described herein, such a 10-fold reduction in transmitted data is likely to be a difficult service to implement due to a defect in sufficient broadcast channel bandwidth or an unacceptably slow refresh rate (in terms of the user) have.

For a better understanding of the advantages associated with the present invention, the following examples are given. A service categorizes securities into subsets, for example, currency, foreign exchange, futures, commodities, currencies, and so on. For a set of one thousand securities, the number of bits required to transmit this information over the delta channel (without symbol reference as described above) is approximately 1000 * 11 or 11,000 bits (using the first example given above) . Some overhead (e.g., time stamp information, message type, subchannel identifier, etc.) increases this number to, for example, about 15,000 bits.

The number of net bits per layer 2 frame of the S-BCCH is expected to be about 100 bits. Thus, the yield of timeslots per superframe basis is 100 / 0.6 or about 166 bits per second. Thus, by assigning only one timeslot per superframe to this service, and assuming all of this bandwidth is used for the delta channel, it is approximately 90 (for bit errors not considered) to transmit information for 1000 securities (See below for the time variant of bandwidth). If three time slots per superframe are used, the refresh cycle can be shortened to 30 seconds. Of course, other bandwidth allocations are possible within the scope of the present invention.

To increase the efficiency of the ticker ticker service, bandwidth allocation to individual ticker ticker subchannels can be modified according to the state of the securities market, for example time. When the market is open for sale, most of the bandwidth is allocated to the delta channel. This is due to the fact that, as indicated above, delta channels provide incremental / decremental values of securities that continuously change over the period during which the trade is occurring (i.e., require updating). On the other hand, most of the bandwidth is allocated to the start value channel until the market is reopened after the market is closed. The securities name channel will be closed because the channel will need to be read relatively rarely, for example, if the stock symbol is assigned to another company or the name of the company may change. Will be a relatively low-bandwidth channel that can only be transmitted at a time.

Table 1-3 summarizes the bandwidth allocation for some of the S-BCCH subchannels of the present invention during market opening and closing. In the following description, those skilled in the art will understand that the reference to the number of the S-BCCH timeslot is not necessarily to be interpreted precisely, but rather reflects the effective multiplexing rate of the logical subchannel to the S-BCCH. Before the market is opened, the broadcast bandwidth allocated to the start-value channel may be one, two, or three S-BCCH timeslots, as shown in Table 1. The delta channel has no bandwidth, and the security name channel has a relatively low bandwidth, for example, 1/2 or 1/3 of the slot. The cycle time is based, among other things, on the encoding of the above example for display of the price.

Table 2 summarizes the allocation of the start value channel for the time when the market is reopened. It can be seen that since the starting value bandwidth is reduced, the delta channel can have the most bandwidth available for this service, while the security name channel can have low or zero bandwidth.

The bandwidth allocated to any of these channels will depend, at least in part, on the amount of broadcast resources allocated to the entire information service. For example, if the total bandwidth of the security ticketing service of the present invention is limited to 2 S-BCCH slots, allocation is made as shown in Table 3 during the market opening.

In this allocation mechanism where only limited bandwidth is available, the securities name channel will be transmitted only when the market is closed. For a newly activated mobile station, a security symbol is used instead of the first day's security name, or if there is a preprogrammed name, this will be used.

According to the present invention, the security ticketing service can be provided to the user at various levels. For example, a basic service may include the widest trading securities, while a premium service may include goods, currencies, and futures. The securities ticketing service may provide one or several services without fees, It is possible to enable access to other services for paying a fee.

In order to control user access to these subscriptions being charged, the present invention provides scrambling (or encryption) of these services. As a result, the user needs to have a predetermined descrambling (or decryption) key to have access to a particular service category.

Once the user is granted access, the mobile station broadcasts on the logical channel described above and accordingly receives the service information processed by the processor of the mobile station and displays it to the user. The security information may be provided to the user on display 190, for example as follows:

As described above, the securities name channel provides the necessary mappings so that the company name is displayed in other ways.

The user can scroll through the list of security information provided on the display 190 using the function keys. Several lists may exist at each service level. The present invention also allows the user to organize entries from multiple lists into folders. For example, a user who owns one of several lists and one of the service levels may place these securities in a separate folder. This eliminates the need to scroll through the entire list for the information most interesting to that user.

In order to facilitate data retrieval, service information may be categorized into categories, as described above. The information may include, for example, the type of business (e.g., telecom, oil, banking, etc.), the market in which the symbol is traded (e.g., NYSE, NASDAQ, Gift, commodity, etc.). Multiple categories are set by the service provider and then sent to the user along with the data. It is clear that a security may be associated with more than one category (eg, telecom and NASDAQ). In order to reduce the required bandwidth, the category information may be transmitted as an information element common to all or a subset of elements of the category. Thus, the list may be organized such that, for example, the NYSE category is transmitted first. The telecom is transmitted within this context.

In an embodiment of the present invention, an alarm is set for individual securities or for an entire folder. For example, it is set to indicate that the change or total amount of one or more securities is outside of a certain range (or box), the relationship between two or more securities is out of the box, or that changes in the entire folder are out of the box. As a result, when one of the above-described events is triggered, for example, the user receives an event alert through an alarm such as an audio signal, a blinking icon, or a vibrator. If the user sets a wireless communication device to receive only a specific range of all lists that are easy to receive (e.g., to reduce the power or current consumption of the mobile station's battery) and if one or more of the securities of interest falls outside a certain range , The trigger may cause the mobile station to begin reading a larger or more complete set of suitable lists. Furthermore, if the security reaches a certain level or moves out of the box, the mobile station may send an SMS message or other type of notification to another user or device (if it is a two-way mobile station). This can be used to buy or sell securities, for example, to send an e-mail message to a broker.

As is apparent from the above description, the amount of data per security must be very small in order to have a reasonable security ticker service (i.e., high speed service providing a large amount of securities) that provides the desired data on the S-BCCH. The present invention divides data into three channels to control bandwidth allocation to these channels according to market conditions. For example, assigning multiple bandwidths to a delta channel in the above described embodiment makes the inventive security ticketing service available within the bandwidth limitations of the DCCH available to today's IS-136 compliant wireless communication systems.

Securities symbols are not defined in some countries. Instead, the full or abbreviated name of the security is used to identify the security. In this case, the start value channel may include a special identifier, e.g., a number, instead of a security symbol. This identifier is then used to link the name of the security that is broadcast on the securities name channel to the start value channel and the symbol name or identifier is used on the delta channel from the start value channel to the delta channel. The identifier effectively acts as a symbolic name. In fact, the official symbol name is a special type identifier if it exists.

The advantage of defining a symbol instead of a special identifier is that it can not display the defined symbol if the user is not able to recognize the special identifier while the mobile device does not store the corresponding security name. It is therefore desirable to reprogram the remote device with a mapping between the security name and the special identifier so that the user-recognizable information can be easily displayed for systems using special identifiers that are not security symbols.

Another way to transmit a security name channel is to send all information (name, start value, change) on one common channel and to send a logical name , And one of the advantages of the present invention (e. G., Low utilization of broadcast resources) does not occur.

If the mobile device has a local communication facility, for example an infrared or wireless link, the received data may be transmitted to a general purpose computer, for example a PC laptop. Because mobile modems are typically user friendly and do not have feature rich user interface and application programming, it is easier to analyze the data on these devices. The user's portfolio can be located on the PC. The PC may have a program for analyzing information broadcast on several subchannels as delayed by the mobile station, which alerts the user according to a more advanced trigger and / or evaluates the user &apos; s portfolio .

As discussed above, the delta channel may include a time indicator related to the incremental / decremental value to which information is to be transmitted for the security provided by the service provider. This time indicator may indicate the last trading time associated with these values (i.e., when the current change value of the delta channel is valid in the securities market) and / or a set of values (e.g., a full set of oil prices Securities) may reflect the transmission time first transmitted on the delta channel. The service provider may specify that the value transmitted on the delta channel reflects a sale that occurred at a certain predetermined time in the past, e.g., a 20 minute delay.

The time associated with the value of the security (in accordance with the techniques described above) may be presented to the user on the display of the mobile station. Due to bit errors (more specifically word errors), several frames (e.g., Layer 2 S-BCCH frames in the context of the IS-36 compliant system described above) are not retrieved. If the refresh rate of the contents of the delta channel is equal to the cycle length of the channel, the lost information does not appear again at all. Thus, the mobile station may have more current value information for some securities than for other securities. Even if the incremental / incremental data is repeated on the delta channel, there is no guarantee that the already lost data in the second case will be decodable for a particular security. Thus, some securities may be displayed using values calculated based on delta values that are several cycle lengths.

According to an embodiment of the present invention, the displayed stock price and / or time indicator may provide a special indication to the user to indicate when the user is refreshed by the received delta channel information. For example, an indicator that fades over time can be used to indicate the relative time at which the value is refreshed, for example, by adjusting the color and / or brightness of the display value. Alternatively, an icon may be provided on the display to indicate that the value has recently been updated, or vice versa. This indication may be faded out for a few seconds or a few tens of seconds, or the refresh rate for the transmission cycle length, Lt; / RTI &gt;

An indication of how recently the information was updated should be combined with the refresh rate of the service provider of the broadcast data rather than the cycle time to transmit the complete set of information. For example, if the transmission cycle length is one minute (ie, a complete set of information is transmitted on the delta channel every second) and the service updates the information every 5 minutes, the incremental / Lt; RTI ID = 0.0 &gt; 5, &lt; / RTI &gt; In this case, the time indicator of the information being displayed indicates whether the mobile station is able to correctly decode the most recent repeated cycle of the delta channel if it has already received and decoded the same information in the previous delta channel cycle, You should warn the user whether this service provider is the most recent available. By providing the trading time or using a change indicator of the broadcast channel, the mobile station can identify the difference between the updated content of the delta channel and the repeated information.

The difference between the content refresh rate and the cycle time provides an opportunity for the mobile station to adjust the way the delta channel is read. For example, using IS-136 as an example technique, the smallest segmentation data that may be allowed or rejected is a Layer 3 message. A Layer 3 message may contain 225 octets of data. Some Layer 2 frames need to carry a full length message. If one layer 2 is not recoverable, the entire message can not be presented to a higher layer. There may be a mechanism (e.g., numbering) that allows the mobile station to attempt to read the lost Layer 2 frame again if the information is repeated without the need for another Layer 2 frame to be recoverable.

Since the type of data transmitted through the broadcast information service according to the present invention is changed more frequently than, for example, other system broadcast information, it is desirable to configure the message length so that it is not necessary to transmit too many layer 2 frames Do. This increases the likelihood of reconstructing the complete message on the first try, for any frame error probability. If a message is lost, usually a few entries in the delta channel are lost. Typically, some Layer 3 messages need to carry a full cycle delta channel. By reducing the length of the message and thus increasing the number of messages, the mobile station can recover more data for one cycle for each cycle. If the content refresh time is slower than the cycle time, the mobile station can concentrate on recovering the lost message in the first cycle.

For example, a broadcast channel as part of a delta channel may indicate the number of repetitions of the content refresh cycle and the current cycle number. The system can use the previous example to broadcast that the content refresh cycle is five broadcast cycles and that this is cycle 2 of the five. This allows the mobile station to increase its battery life by allowing the mobile station to only read repeated information if it is not properly decoded in the first cycle or when a new content refresh cycle is starting.

Because the content of the delta channel is grouped into a message, the time stamp (of transmission or sale, as previously described) may be sent as part of the message rather than with all entries in the delta channel. This reduces the overhead of providing time stamp data. Similarly, any other type of information common to a particular delta channel entry included in a particular message may be sent within the message once. Attributes common to the other two channel types are also suitable for bundling in a Layer 3 message. Bundling can be used for any other layer or segmentation of the entire protocol.

For example, as described above, the broadcast channel may be subdivided into several subchannels. Some messages may be transmitted within a subchannel. Thus, the three channel types according to this embodiment of the invention can be transmitted in a single subchannel. Bundling of common overhead is best done at the highest common point to reduce the bandwidth required for this attribute. For example, information of the most important characteristics for identifying a specific service on a broadcast channel, information for decoding the cycle length, number of cycle repetition, list number, data, etc. may be repeated for a minimum of time. Can be sent once per peak common point in the cycle. If the mobile station can not read this information, it can not be synchronized to the sequence of information according to the particular type of information and should wait for the next appearance. Thus, by all broadcast services, there is a trade-off between bandwidth efficiency and time to log in to the newly arrived mobile station.

<Sports information service>

Another example of a broadcast information service suitable for sub-channelization for efficient transmission according to the present invention is sports news. For example, sports information represented by CNN headline news on the first page of a newspaper can be efficiently transmitted on a wireless channel.

Here, a channel referred to as a preset sports service (CSS) can be transmitted in both broadcast and point-to-point mode. The point-to-point mode is an address message (or message set) sent on the FACCH or SACCH channel, identified by the CSS service identifier. This service can be accessed from the server using the packet data channel. For the point-to-point mode, the mobile station may issue a request for a particular sports result or the mobile station may automatically receive the result periodically, especially during the day the league is playing. In broadcast mode, no system access is required.

Examples of information that can be displayed by CSS include:

New York Rangers - Pittsburgh 2-0

Miami - Detroit 1-4

The first column contains 34 oxets. The second column is an example of a team name that contains relatively few characters in its name. The second column requires 20 characters. The required joke set contains a space between the names and a single "line space" where no characters are displayed. This display requires 54 characters. As the average of the two results, 27 octets per result are required, resulting in 8 * 27 = 216 bits. The existing text-based SMS service of most wireless systems (e.g., IS-136) is used to send this information. As with the securities quotes service described above, the purpose of this embodiment of the present invention is to drastically reduce the number of bits required to transmit this type of information.

In the United States and Canada, the sports that are most interested are organized into only a few leagues. Major leagues include NHL (ice hockey), NBA (basketball), MLB (baseball), and NFL (football). The nature of such sports information can be used to assist in sub-channelizing sports information for wireless broadcasting, as follows.

As a first example of CSS, a league identifier (LI) is assigned to all leagues of interest and a league member identifier (LMI) is assigned to all the teams in the league. Thus, the combination of LI and LMI identifies the type of team and sport in particular. Suppose there are up to 32 teams in the league. The number of bits required for LMI is 5 bits. It is assumed that one digit is sufficient for the result (i.e., 4 bits). Space, lines, etc. are not necessary for transmission. The total number of bits required is 5 + 5 + 4 + 4 = 18 bits. This example is compared with a text-based transmission example that requires 216 bits, without considering the protocol overhead bits needed to be transmitted.

Examples of formats used in CSS are very efficient but not available. One digit for displaying results is not enough for many sports, for example, football. The number of teams can be more than 32. Thus, the format may include a continuous flag that uses a length indicator to indicate whether more digits follow or how many bits should be used to represent each numeric result. It will be appreciated by those skilled in the art that the provision of a length indicator and a continuation flag is known to provide the receiver with the information necessary to properly read the broadcast information. Flexible protocols require several more bits per result. However, the efficiency is still about 10 times larger than the transmission of the preformatted text sequence.

A protocol used in CSS according to another embodiment of the present invention includes two channels:

1. CSS Programming Channel (CSS-PC), and

2. CSS Result Channel (CSS-RC)

.

The CSS-PC channel is:

CSS-PC identifier

ㆍ League Identifier (LI)

ㆍ Number of entries

A set of League Member Identifiers (LMI)

ㆍ The name of the team

.

As with the Securities Name channel, the CSS-PC can normally be transmitted at a time when the broadcast channel is not so busy, for example at night. The content of the CSS-PC may be preloaded by the mobile station manufacturer, transmitted to the mobile station as part of an over-the-air activity or programming event (e.g., when a telephone number is assigned to the mobile station) For example, cable, infrared, short-range wireless link service, etc.). The CSS-PC links a name, e. G., The New York Ranger, with an identifier, e. G. A number, which may be stored in the mobile station. This identifier is used by the CSS-RC to represent the team. The device maps the identifier to the team name displayed to the user.

The CSS-RC channel is:

ㆍ CSS-RC identifier

LI (1)

ㆍ Entry number

Result 1, Result 2, .., Result n, ..., Result m

ㆍ LI (2)

ㆍ Entry number

Result 1, Result 2, .., Result n, ..., Result p

ㆍ ...

.

Where each " result n " includes 2 LMIs and scores. A similar overhead that may be added to each " result n " entry to make the protocol flexible in the display of length indicators, continuous flags, etc. and content is not shown above.

According to another exemplary CSS embodiment, the League Identifier (LI) is replaced with a joint set of team identifiers (TI) for all leagues. For example, an identifier (e.g., a number) may be assigned to the largest city in the United States and Canada. For 1000 cities, 10 bits are needed to represent all cities.

The TI concept through LMI has the advantage that the team does not need reprogramming when entering or exiting the league. Depending on the size of the TI and the LMI, the required bandwidth (number of transmitted bits) may be different. Because most of the required bandwidth is used as a result rather than a league identifier, and because the league is known in abbreviated terms (e.g., NBA), the league identifier can be sent directly as text, without degrading significant bandwidth efficiency. Thus, the TI concept may not require a programming channel at all if a sufficient number of cities are defined. Any sport result between cities X and Y can be displayed in a bandwidth-efficient manner. Only the type of sports can be sent in an unencoded text format, or a combination of LI and text can be used.

The LMI concept has the advantage of displaying the name of the complete team, not just the city name, as a New York Ranger instead of New York, for example. Another difficulty with the TI concept is that if there are two teams in the league that are based on the same city, for example in the New York Yankees and New York Mets.

The resulting channel in this second embodiment is:

ㆍ CSS-RC identifier,

• Local domains (for example, US / Canada)

Text describing the results of the first set (e.g., NBA)

ㆍ Number of entries

Result 1, Result 2, .., Result n, .., Result m

Text describing the result of the second set

ㆍ Number of entries

Result 1, Result 2, .., Result n, .., Result p

.

In the CSS result channel, any of the above-described formats can be used to transmit other auxiliary information using a predefined (pre-prepared) format. Keep the bandwidth requirement low by using the prepared message.

Here is an example.

For example, the auxiliary information of CSS-RC is:

Final result

Half time

The N-th quota (N = 1, 2, 3, 4)

cancel

delay

As shown in FIG.

In addition, you can send insert text to use when you can not apply a message that is prepared in advance to describe a particular game or match status. An example of the auxiliary preparation information and the insertion text is as follows:

Miami - Detroit 1-4 reach the final Detroit playoff

The word " final " is a prepared message (the word " final " is displayed, requiring only a few bits to transmit the bits mapped to a set of stored messages at the mobile station), while the italicized text is an embedded message. Certain phrases are sent more often as insert text, and as phrases become longer, they provide more ready-made solutions. For example, Detroit playoffs can be prepared in advance by identifying Detroit as an LMI or TI and assigning a "play-off advance" to a pre-prepared message set.

In the third example of the CSS, pairing of the team is performed before starting the game. The techniques described above can be used to form a pair (LMI, TI, or text). Prior to the start of the game, the pairing programming of the mobile station can allocate relatively little bandwidth to this purpose, as time is imminent. A pair of LMI or TI is assigned to the pair number (PN). For example, PN = 1 is assigned to a game between New York Yankee and Baltimore Olions, and PN = 2 is assigned to a game between the Boston Red Sox and the California Angels. The mobile station may store this information.

When the game starts, only the PN and the result are transmitted. For example, Transfers 1, 2, and 1 are interpreted by the mobile station and labeled "New York Yankees 2 Baltimore Olions 1". Alternatively, the result can be sent to the PN. Thus, only scores need to be transmitted, which reduces the required bandwidth. This embodiment needs the mobile station to have paired information before interpreting the score information. Thus, the paired information can be transmitted on a separate subchannel from the scoring channel, of which the electrons need to be read once a day. As described above, the transmission of auxiliary information is also applicable in the pairing embodiment as well.

<Other Embodiments>

The invention may also be used, for example, to provide a broadcast weather service. The weather information can be broadcast on a separate programming channel, for example, as shown in Figures 5-7, and an area (e.g., city, country) associated with weather information is identified. This programming channel can have multiple content in different areas of a country. The type of weather can be defined in advance, that is, a message prepared in advance. If a pre-prepared message is inappropriate or a message other than the available pre-arranged information is needed, the inserted text may be sent for this weather application in the same manner as described above for the sports score application.

Examples of broadcast weather information include:

60% rain probability Apple Hill Festival canceled

Thunderstorms show up in Wake County from 8:30 p.m.

In the example described above, each underlined text segment may be provided as a pre-prepared message, for example, by sending an identifier on the weather broadcast subchannel and retrieving the message for display from the memory of the remote terminal. The " at wake count " text may be a locally programmed message, i.e., only a particular subset of mobile stations may be storing this message in their memory. The italicized text may be an embedded message, that is, it is broadcast as text. Other text segments are too general and may be part of a programming message that is common to all countries. Thus, a programming channel that defines a link to a message and a short identifier may have several sub-channels to provide different types of service / bandwidth usage. Local, regional and national programming channels can be considered.

Taken individually, it is not as troublesome as transmitting the combination of the amount of text and the refresh rate of the necessary weather information, for example, as security ticket information. Thus, the broadcast weather service application can use a straight text format in which all desired information is broadcast directly over the broadcast subchannel. However, when used in connection with other broadcast information services, it may be desirable to develop a channelized format for weather information. If a channelization protocol is developed for other broadcast applications, there is little or no additional complexity for the remote device to handle weather information using the channelization method described above.

Another application of the channelization and encoding technique according to the present invention is a broadcast news service. This type of information is less suitable than previously described messages for other embodiments described herein, and therefore these types of hierarchical pre-prepared structures are less suitable. However, there are key words in the broadcast news service that are well-suited to expressions prepared in advance, such as presidential, parliament, senate, ..., approval, rejection, proposal, election, nullity, and legal action. In this case, the channelized news method may be employed in connection with one or more of, for example, a channelized security ticketing service, a channelized sports information service, a channelized weather service, and the like. Alternatively, it may be provided as a broadcast headline hyperlinking service as described in U.S. Patent Application Number entitled " Headline Hyperlink Broadcast Service and System " of Alex K. Wray, filed on the same date as the present application , The disclosure of which is incorporated herein by reference.

Yet another embodiment of the present invention is a broadcast service for air port information. Examples of information that can be broadcast for this service include:

Flight AA 80 Moving to Stockholm at 6:10 pm

As in the first example, the underlined text can be broadcast and reproduced to the terminal with a prepared message, while the italic information can be transmitted as the embedded text. A user who only uses one air line may set the filter on his remote device to display flight information relating to that air line and optionally including general information that does not belong to a particular airline. In this example, time 6.10 is an insert text, not a pre-prepared message. Those skilled in the art will appreciate that there are many different texts depending on the predefined message definition or the insertion text for a particular set of words or times.

If there is severe weather on a large airfield, such as Chicago's O'Hare, it can affect hundreds of flights. Thus, the complete list of information may include hundreds of lines of information similar to those described above. This information can be updated several times per hour. Therefore, the insertion text method is desirable for a channelization method that provides a relationship that reduces the bandwidth of broadcast information on several subchannels without worrying in terms of the required broadcast bandwidth.

The filtering of the broadcast information may be desirable since the user is interested in a limited subset of the available broadcast information. For example, the user may enter a flight number of interest, e.g., AA80, to the remote device. The user can then be alerted (e.g., as an audible tone) if there is information about the particular flight of interest. A change flag or time stamp can be used on the broadcast airfield subchannel to avoid repetitive alerts when the same information is subsequently received.

To illustrate how channelization techniques in accordance with the present invention can be used to efficiently transmit various types of information in a manner that reduces the use of broadcast resources that are rarely used in connection with wireless communication systems, Describe securities quotes and sports score information services in more detail. These techniques are generalized as follows.

It is contemplated that broadcast information processed for display, storage or organization in a mobile station may be grouped in accordance with the present invention as a set of information elements, hereinafter referred to as " association ". The information element may be explicit (e.g., bit flags or fields) or implicit (e.g., sequencing). At least two associations are hierarchically formed for any information service based on the recognition that at least one of the elements of one association has more bandwidth than at least one of the elements of the other association. The first association establishes a relationship between the relatively high bandwidth consuming elements of the association and the other elements of the association requiring lower bandwidth for transmission. The second association also includes a plurality of elements, including being an explicit or implicit part of the first context, thereby forming a link between them.

This concept is illustrated in Fig. Here, each association is represented by a rectangle. Each information element is represented by a circle in the association rectangle. Parenthesized circles represent implicit information elements. The horizontal line represents the relationship used to channelize the transmitted information efficiently and the vertical or nearly vertical line represents the link between the elements of the various associations. Those skilled in the art will understand that although there is a relationship between each information element of the association, it may depend on some relationship to provide the mapping to the remote terminal but is otherwise not dependent. The combination of the elements within an association and the links between elements of different associations provides an optimization mechanism for bandwidth utilization. Generally speaking, the number of associations for a particular information service and the number of elements in each association are arbitrary and determined by the type of information element and the frequency with which these information elements are to be updated in the mobile station.

To further clarify this concept, consider a security ticking embodiment of the above-described example, expressed below using a generalized association and element structure as shown in Figures 9A-9C. Here, the first association is a securities name association. The information element of this association is transmitted relatively infrequently, for example, the complete name of the securities, and the name of the securities market associated with this security. Additionally, since the symbol name is desired to form a relationship between the symbol name and the security name, and this relationship can be used to optimize bandwidth utilization for the security ticketing service, some of the association do.

The second association is the initiating association. A start association is an information element that can be transmitted somehow more often than the elements of the start value information element, the symbol information element and other first associations, for example, a dividend that informs the user when a particular security is supposed to pay a dividend And includes update information. In this example, the order of the information to be sent, for example, the order of the symbol information elements, creates an implicit information element (indicated in parentheses) referenced by the sequence number associated with the symbol information element.

The third association is the Delta Association. Wherein the sequence number is explicitly transmitted and provides a link between the elements of the second and third associations. The change value is also transmitted for each security. By using the two relationships formed in the first and second associations, namely, the security name to symbol and the symbol to the security number, and linking these elements between the associations, the mobile station can read the delta channel, The system displays the full security name associated with each value while the system only needs to transmit the sequence number and the change value.

Other embodiments are shown in Figures 9B and 9C. In Figure 9B, the sequence number is explicitly sent in the second association and implicitly in the third association. In FIG. 9C, it can be seen that the sequence number can be an implicit element of the second and third associations.

Other variations become apparent. For example, although the examples of Figs. 9A-9C provide respective associations linked to one association in each hierarchical direction, multiple associations may be linked to one or more other associations in each direction. Moreover, any number of relationships within an association can be provided to reduce the amount of information that is transmitted in a context with a lower number of cycles. An association may be sent several times, for example, for sale or after a sale, or may be sent at the same time. If sent at the same time, the contexts can be sent asynchronously, i. E. At multiple cycle times and / or refresh rates of these contents. It will be appreciated that the phrase " cycle time " represents the time between specific information in the same case repeated therebetween, for example, the time between broadcasts of change information elements associated with ERICY on the delta channel. The phrase " refresh rate " may include, for example, the time between updates by a service provider of the value associated with a particular information element in each case, for example how often a service provider broadcasts a change value of ERICY securities broadcast on a delta channel Quot; The cycle time and refresh rate may be different for any subchannel or association, or between several subchannels and associations. For example, if the refresh rate is greater than the cycle time, the particular value may be rebroadcasted. In this case, the change flag can be used to indicate whether the currently broadcasted information is new or rebroadcasted. Introduces a channelization technique according to the present invention to reduce the bandwidth requirement or cycle repetition period for the lowest channel of this layer.

In addition to efficient broadcast resource utilization, the channelization and encoding techniques according to the present invention provide other important advantages, particularly the ability of an application program to know the content of information received over several broadcast channels or subchannels. For example, compared to a service that broadcasts a text message to a display of a pager, the channelization and encoding techniques presented herein provide a device that receives a clear or implicit knowledge of the type of information received or not received do. Consider, for example, a broadcast information service that broadcasts ERICSSON 53 3/8 +1/2, where the message is displayed in abbreviated form on the paging device, relatively bandwidth inefficiently. Because the message is abbreviated and displayed, the phaser does not need to know anything about the received information, and therefore can not recognize whether this information can not be easily handled or specific information is received or not received.

In contrast, the channelization and encoding technique according to the present invention is used in addition to the bandwidth being valid, to provide information to the remote device regarding which information element has been received, Form relationships and structures between information elements. Moreover, the ability to more easily understand the content of information received by the remote device makes it easier to organize, present and manage the data, and also allows retrofit compatibility to be improved by adding new information elements.

The broadcast aerodrome information service provides another example of broadcasting the information in a channelized format, thereby explaining the advantage that the remote terminal is opposed to the free format text. The driver of the car heading to the airfield is difficult to screen forward information about all flights to find information about his flight.

Although not described in detail herein, those skilled in the art will appreciate that network operators and system providers would like to make techniques and procedures for monitoring and controlling access to broadcast information services as described herein. Specific techniques are described in the US patent application number of Alex K. Wraith, entitled " Broadcast Service Access Control ", filed on the same day as this application, the details of which are incorporated herein by reference, The access control technique may be combined with the channelization and encoding techniques described herein.

Although the present invention has been described in connection with a security ticketing service, those skilled in the art will appreciate that the information may be equally applicable to any other system that is broadcast to the user. For example, it should be noted that the linked (hierarchical) channels disclosed herein may be sent on any type of channel. Thus, any of the information elements transmitted on the linked channel in a particular service may be sent on the broadcast point-to-point channel or entered into the phone by local means (e.g., infrared, cable, local wireless communication) May be stored in the device. Thus, delta channels, sports score channels, aerodrome status channels, etc. can be sent as point-to-point messages rather than on broadcast channels. The channel link makes any channel available and allows the channel to be transmitted even at unrelated times. Moreover, the way in which the logic channel is linked to the existing channel structure can be easily changed and employed in various systems. Many variations and combinations of the foregoing description can be devised by those skilled in the art without departing from the spirit and scope of the invention as defined by the following claims.

Claims (38)

A method for providing broadcast information in a wireless communication system, Dividing a broadcast control channel into a plurality of logical subchannels, each logical subchannel comprising a plurality of information elements; Linking a first one of the plurality of logical subchannels to a second one of the plurality of subchannels by providing a common information element to the first and second subchannels; And Broadcasting the first and second subchannels The broadcast information providing method comprising the steps of: The method of claim 1, wherein the broadcast information is security information, Wherein the first subchannel of the plurality of logical subchannels comprises a plurality of cases of a security symbol information element and a security name information element. 3. The method of claim 2, wherein a second subchannel of the plurality of logical subchannels provides a last sale of securities on a day in a plurality of cases. 4. The method of claim 3, wherein the third subchannel of the plurality of logical subchannels provides values for a plurality of cases that indicate the amount by which the value of the security is increased or decreased. 3. The method of claim 1, further comprising: modifying bandwidth allocated to each of the plurality of logical sub-channels in response to a predetermined event. 6. The method of claim 5, wherein the predetermined event is whether the securities market is opened or closed for sale. The method of claim 1, wherein the broadcast channel is a short message service broadcast channel. The method of claim 1, wherein the broadcast information is sports information, Wherein the first subchannel of the plurality of logical subchannels transports a plurality of case &lt; RTI ID = 0.0 &gt; identifiers. &Lt; / RTI &gt; A method for providing securities information to a mobile station, Dividing the broadcast control channel into a plurality of logical subchannels; Transmitting a list for mapping a security symbol to a security name to the mobile station via the first one of the plurality of logical subchannels; Transmitting first data indicative of a last sale price of the day to the mobile station via a second subchannel of the plurality of logical subchannels; And Transmitting second data indicative of an increased or decreased amount of the security value to the mobile station via a third one of the plurality of logical subchannels The method comprising the steps of: The method of claim 9, further comprising allocating a predetermined amount of bandwidth in response to a predetermined event to the first, second and third subchannels among the plurality of logical subchannels . The method of claim 10, wherein the predetermined event is whether the securities market is opened or closed. 12. The method of claim 11, wherein the majority of the bandwidth is allocated to a third subchannel of the plurality of subchannels when the securities market is opened for trading. 12. The method of claim 11, wherein the majority of the bandwidth is allocated to a second subchannel of the plurality of subchannels when the securities market is closed. The method of claim 9, wherein the mobile station is a cellular phone. The method of claim 9, wherein the broadcast channel is a short message service broadcast channel. A system for providing broadcast information to a mobile station, At least one service provider; And A plurality of logical broadcast control subchannels for providing various types of broadcast information from the at least one service provider to the mobile station, And provides broadcast information to the mobile station. 17. The system of claim 16, wherein the first subchannel of the plurality of logical subchannels provides a broadcast information to a mobile station providing a mapping of a symbol of a security and a name of the security. 18. The system of claim 17, wherein the second subchannel of the plurality of logical subchannels provides broadcast information to a mobile providing the last securities sale of the day. 19. The system of claim 18, wherein the third subchannel of the plurality of logical subchannels provides broadcast information to a mobile station providing a value indicative of an amount by which the value of the security is increased or decreased. 17. The system of claim 16, further comprising means for allocating a predetermined amount of bandwidth in response to predetermined events for each of the plurality of logical subchannels. 21. The system of claim 20, wherein the predetermined event provides broadcast information to a mobile station whether the securities market is open or closed. 17. The system of claim 16, wherein the mobile station provides broadcast information to a mobile station that is a cellular phone. 17. The system of claim 16, wherein the broadcast channel provides broadcast information to a mobile station that is a short message service broadcast channel. A system for providing broadcast information to a plurality of mobile stations, At least one service provider; And A plurality of logical short message service broadcast channels for transmitting the security information provided from the at least one service provider to the mobile station; / RTI &gt; And wherein a variable amount of bandwidth is assigned to each of the plurality of logical channels in response to a predetermined event. 25. The system of claim 24, wherein the predetermined event provides broadcast information to a plurality of mobile stations whether the securities market is open or closed. 25. The system of claim 24, wherein each of the plurality of logical channels provides broadcast information to a plurality of mobile stations providing different types of security information. 25. The system of claim 24, wherein a first one of the plurality of logical channels provides broadcast information to a plurality of mobile stations providing a mapping of a symbol of a security and a name of the security. 26. The system of claim 24, wherein the second subchannel of the plurality of logical subchannels provides broadcast information to a plurality of mobile stations providing the last sale of securities. 26. The system of claim 24, wherein the third subchannel of the plurality of logical subchannels provides broadcast information to a plurality of mobile stations providing a value indicative of the amount by which the value of the security is increased or decreased. The method of claim 9, further comprising warning the user of the mobile station when the second data reaches a predetermined value. The method of claim 1, wherein the information is transmitted using one of TDMA, CDMA, or hybrid access method. A method for channelizing and broadcasting information in a wireless communication system, Forming at least a first association and a second association each comprising at least one information element; Mapping a first information element of the first association to a second information element of the first association; Providing the second information element to the second association explicitly or implicitly to form a link between the first and second associations; And Broadcasting the first and second associations And channeling and broadcasting the information. 33. The method of claim 32, wherein each information element has a plurality of cases associated therewith. 33. The method of claim 32, wherein the first association is a security name context, the first information element is a security name, and the second information element is a security symbol. 35. The method of claim 34, wherein the second association implicitly comprises a sequence number information element and explicitly comprises the securities symbol information element. 33. The method of claim 32, wherein the first association is a sports program association, the first information element is a team name, and the second information element is a league member identifier. 33. The method of claim 32, further comprising: broadcasting the first association at a first cycle time; And Broadcasting the second association at a second cycle time Wherein the first and second cycle times are different from each other. 33. The method of claim 32, further comprising broadcasting the first association at a first cycle time and at a first refresh rate, wherein the first cycle time is determined by channeling and broadcasting Way.