JP5462366B2 - Short user messages in system control signaling - Google Patents

Description

  The present disclosure relates to the field of short messages for wireless communication, and in particular to short message communication using a portion of a control message.

  Text messaging allows a mobile phone or other wireless user device to send a text message to another mobile phone or wireless device. It would be well known for mobile phone users that legislation prohibiting the sending of text messages while driving was passed. Scientific research is being conducted to study the mental effects of text messages on grammar and communication skills, and the physical effects of text messages on thumbs. In many wireless communication systems, text messaging is supported via short message service (SMS).

  SMS supports text and sometimes other small data files. MMS (Multimedia Message Service) is introduced to allow large data files such as large images and video images to be transmitted from one mobile phone or other portable device to another. The two systems operate with different messages that are different parts of the air interface.

  Due to the demand for faster transmission of more data and media rich files, current wireless communication systems are moving to the fourth generation (4G). LTE (Long Term Evolution) and IEEE (Institute of Electrical and Electronics Engineers) 802.16m will be one of the most used in the world.

The embodiments of the present invention are illustrated by the attached drawings, wherein the same reference numerals are used to represent the same features, but are not intended to be limiting.
1 is a schematic diagram of a wireless system suitable for implementing one form of the invention. It is a signal diagram which transmits / receives SMS between a base station and a mobile station in the connection mode according to one form of this invention. It is a signal diagram which receives SMS from a base station in a mobile station in a standby mode according to one embodiment of the present invention. It is a signal diagram which transmits SMS from a mobile station to a base station in the standby mode according to one mode of the present invention. FIG. 6 is a block diagram of a mobile station or base station for implementation of aspects of the present invention.

  In connected mode, the MS may send an RNG-REQ to the BS (base station) using all or part of the TLV message to transmit the short message. For reception, the MS receives the RNG-RSP from the BS using TLV to transmit the short message. Other messages and control messages may be used depending on the application.

  FIG. 1 shows an example of a cellular radio system 10. The plurality of MSs 12, 14 may be mobile or fixed and may take the form of a mobile phone, notebook, personal computer, media player, appliance, or various other wireless connection devices. The MS may also be referred to as a subscriber station, remote station, terminal, or other name.

  A number of base stations (BS) 16-24 are provided in the system to provide connections for multiple MSs. Depending on the application, the BS may take a variety of different forms, cover a large area or a narrow area, and transmit power. Multiple BSs are described in FIG. 1 as similar sources, but multiple BSs may also be connected and configured in different ways. In some applications, a network access point or MS peer may act or function as a BS. In the illustrated example, the first MS is registered in the BS 19, and the second MS is registered in another BS 23. This registration allows each MS to communicate with the BS to support all of the services that the MS and system support.

  Each of the BSs 16 to 24 is connected to a gateway (GW). Here, there are three gateways 25, 26 and 27. Each gateway supports multiple BSs. The plurality of gateways may or may not be connected to each other, but all of the gateways are directly or indirectly connected to the connection service network (CSN) 30. In one system there may be more than one CSN. The CSN is coupled to a telephony or data network backbone 31 that provides access to other telephony communication systems, data servers, services, and the like. In some examples, the BS may be directly connected to the CSN via the backbone 31 without going through a gateway.

  In the illustrative description, system administration and management can be distributed between BS, GW and CSN in a variety of different ways. For communication, the first MS 12 may communicate with the second MS via their connected BS and GW. If both MSs are registered with the same BS, it would be possible to support communication without routing via the GW. Similarly, if the second MS is connected to another system, CSN or ISP (Internet Service Provider), the two MSs can communicate via backbone 31.

  Although FIG. 1 shows one example of a network, the present invention can be applied to a wide variety of network configurations, and communications can be routed differently to suit different situations and applications.

  FIG. 2 shows an example of transmitting a text message or other type of short message using the L2 transmission mechanism. L2 transmission is a concept used by the MAC control plane to transmit higher layer messages. In a WiMAX system, this may be an L2 (layer 2) transmission message such as L2-XFER. L2 transmission uses a specific type and subtype (eg, type 6, subtype a) to carry the message payload. Bandwidth may be pre-negotiated by the MS against the BS in order to send the message payload on the uplink using the L2 transmission mechanism.

  The BS then provides an SMS confirmation 33. Similar to the initial message transmission, the L2 transmission message may be used. L2 transmission uses a specific type and subtype (eg, type 6, subtype b) for verification.

  Both transmission messages of FIG. 2 may be modified. Instead of transmitting a control message intended for the base station, the first transmission message 32 includes a text message or other short message intended for another user. Conventional L2-XFER has type and subtype attributes. A specific “type” such as type 6 and a specific “subtype” such as a sub-type are defined for transmitting short messages. When there is a short message to be transmitted, TLV (Type-Length-Value / Type length Value), or other fields associated with the short message may be inserted into the L2-XFER control message. To indicate that the short message is a user message and not a control message, the data in this field may be replaced by a short message to the user and markers such as type and subtype fields.

  In FIG. 2, the BS may also send an SMS to the MS using an L2-XFER message. Initially, an L2-XFER message 34 is sent to the MS. Similar to the L2-XFER from the MS, this message may include a TLV field associated with a short message to the MS user, with or without other control related TLV parameters. . The TLV for SMS can be identified using any particular predetermined type and subtype. For example, type 6, subtype a can be used as well as transmission from the MS. Alternatively, in connected mode, the BS may send an L2-XFER with confirmation with text to the MS user.

  Using the confirmation message 35, the MS answers the SMS from the BS. This may also be in the form of AAI_L2-XFER of a specific type and subtype (eg, type 6, subtype b). The confirmation may also include another SMS. In order to transmit short messages at the MS in connected mode, the system may choose to use other MAC control messages such as ranging or registration messages. These messages may have a “type” specifically defined for SMS or another user message protocol.

  In the standby mode, the BS and MS are not connected in order to allow the exchange of L2 transmission messages. In FIG. 3, the BS has a short message to send to the MS, but the MS is in standby mode. Therefore, the MS will not receive the RNG-RSP as in FIG. The BS sends page 36 to the MS. In the illustrative description, the form is AAI_PAG-ADV having an action code of 0b01. This page is used to issue a command to the MS to update the location. The multiple stations initially perform ranging 37 to request bandwidth from the BS. The MS then responds and initiates a location update by sending a conventional RNG-REQ 38. In one example, this may be AAI_RNG-REQ (RAID 1 and masking index for ranging) on the CDMA allocated A-MAP IE.

  However, the BS does not respond using conventional RNG-RSP. Instead, the MS receives an RNG-RSP 40 back from the BS containing the SMS related TLV field. As mentioned earlier, this message may or may not include a control message. In the illustrative description, this is followed by a message 41 with a CDMA allocation A-MAP IE (RAID 1 and masking index for ranging). The BS continues to send this message 42 until it receives an acknowledgment 43 from the MS. Both BS and MS may count the timer until an acknowledgment is received. The MS has a timer for CDMA allocation A-MAP IE, and the BS has a timer for acknowledgment. Alternatively, the MS may instead send a ranging and may send other control messages that include SMS text in addition to the acknowledgment.

  In one specific example shown in FIG. 3, when the BS has a downlink SMS to the MS in standby mode, after the BS sends an AAI_PAG-ADV indicating a location update, in the AAI_RNG-RSP message Includes SMS. After sending the AAI_RNG-RSP containing the SMS, the BS grants the CDMA assigned A-MAP IE in an unrequested manner in order to receive the AAI_MSG-ACK as confirmation for the downlink SMS. The MCRC of the CDMA assigned A-MAP IE is masked using a masking index for RAID and ranging. Here, the RAID is the same as the RAID masked by the CDMA allocation A-MAP IE for the AAI_RNG-REQ message sent by the MS.

  After the BS sends AAI_RNG-RSP with SMS, the BS starts a timer, SMS_conform_resource_alloc_timer, and grants CDMA assigned A-MAP IE to the MS. When the MS receives an AAI_RNG-RSP containing SMS, the MS starts a timer, SMS_conform_resource_waiting_timer, and waits for a CDMA assigned A-MAP IE to send an AAI_MSG-ACK.

  If the MS has data to call for a short message and the MS is in standby mode, the MS may perform an unsolicited location update using RNG-REQ 46, including SMS as part of it. Good. This point is illustrated in FIG. In this example, code base ranging is complete at 45 so that the station is ready for communication. The ranging request signal may take the form of AAI_RNG-REQ (RAID 1 and masking index for ranging) including SMS on the CDMA allocated A-MAP IE. At 47, if the base station has a queuing short message to send, the base station may respond with a conventional RNG-RSP, or the base station sends a short message in its RNG-RSP. May be included.

  In one particular example, the BS uses an AAI_RNG-RSP message to send an SMS to the MS on the downlink. The SMS from the standby MS may be included in the AAI_RNG-REQ message. This can be indicated, for example, by using ranging purpose indicator bit # 1 = 1 (“standby mode position update”). If the uplink resources for the RNG-REQ message are not sufficient to send an AAI_RNG-REQ including SMS, the AAI_RNG-REQ may be fragmented using an RNG-REQ fragmentation method.

  While the MS is in a waiting state through the AAI_RNG-REQ message, the BS receives the SMS from the MS. Upon receiving this, the BS may respond with an AAI_RNG-RSP message. This may be used as an SMS confirmation.

  In previous systems, SMS and MMS are encrypted at the physical layer. This can be done if the message is specifically configured to transmit SMS or MMS. In 802.16m, RNG-REQ and RNG-RSP messages are not encrypted. The control message generally transmitted in the TLV of the RNG message is not delicate. This can be compensated by using an application layer, such as an SMS layer encryption mechanism, or by applying encryption in other ways. Higher encryption may be used to encrypt the actual SMS portion transmitted by the TLV of the RNG message without encrypting the RNG message at the physical layer. In the 802.16 example above, the RNG message is part of a collection of multiple MAC (Media Access Control) control messages.

These messages are transmitted in the payload of a MAC PDU (Protocol Data Unit). All MAC control messages may begin with a message type field and include additional fields. The format of the control message is shown in Table 1 below.

  In Table 1, the first part of the MAC PDU is a type indicator. 8 bits are allocated. For RNG-REQ, the type is number 4. For RNG-RSP, the type is number 5. More types of MAC PDUs are supported using other type numbers. The next 8-bit message is zero. After this header, the MAC PDU contains TLV data. As shown below, multiple TLVs may be of various sizes or lengths and may be combined as a single message in a specifically permitted manner. TLV is intended to be a control message that is transparent to the user and ensures smooth operation of the system.

  In 802.16m, ranging with RNG-REQ and RNG-RSP is used to tune the MS transmission with the BS and receive a correction timing offset, a frequency offset and a frequency offset so that the MS transmission is received within an appropriate reception threshold. This is the stage of obtaining power adjustment. Ranging is also used to locate the mobile station as it moves around.

  The ranging message is used in the physical layer to maintain the quality of the wireless communication link. Although the basic structure is the same, different messages are used for the uplink and downlink. Ranging allows the system to adjust time, frequency synchronization, power, and assignments for subcarriers and subchannels. Ranging is performed periodically for various carriers supported between each base station and registered mobile stations.

  The ranging message is part of the basic message for the system. Independent of the broadcast channel and subscriber registration, the ranging message is directed to the specific registered MS and the specific BS to which the MS is registered. Independent of the traffic channel, the basic message handles control information and system configuration.

  A ranging request (RNG-REQ) message is transmitted by the MS at initialization, periodically determines the network delay, and requests a change in transmit power, downlink burst profile, or other system operational parameters. Initialization refers to the time when the MS first tries to access the network and tries to register with the base station. The RNG-REQ message may be sent at the initial ranging and data grant interval. The TLV field portion of the message varies depending on the situation, and there can be one or more TLV fields in a single RNG-REQ message.

  TLV field includes burst profile, MAC address, ranging error, equipment capability and identifier, base station identifier, handover request, network reentry request, emergency call procedure, paging control message, timing, delay and retry parameters, and power control and management Information including a message or the like may be encoded. All of these parameters are targeted to the system and relate to the identification or operation of the MS in the system. None of these messages pertain to information communicated to the user or application layer. In general, the system tries to prevent users from seeing these messages. Otherwise, the user will interfere with the user's interest in information sent to or received from other users.

  A ranging response (RNG-RSP) message has a similar type to the TLV parameters it may send. These may include timing adjustment information, frequency, channel, subchannel, and delay assignments, various timers, slot and frame numbers, device numbers, base station and modem addresses, and paging parameters. Similar to request messages, all TLVs for response messages are also related to control parameters and device operation.

  By using TLV for messages between users, short user messages can be transmitted at any time without changing the mode of operation of the MS. Ranging messages offer the advantage that they can be sent when no active connection is required and can be sent at virtually any time. In order to accommodate such functions, short user messages are uniquely identified and both the BS and the MS are adapted to identify the message and process the message accordingly.

  TLV is an example of an information encoding format. Forms of the invention may also be adapted to use other encoding formats such as ASN1. In many of the forms of the invention described here, the short user message is placed in an optional field. Short user messages may or may not be included in a manner that does not affect other functions. That is, by using the optional field, the presence or absence of a short user message does not affect the analysis of the message when the message is analyzed.

  An example of a hardware configuration that can be used for both the base station and the mobile station for executing the communication described above is shown in FIG. In FIG. 5, station 50 is driven by processor 52. This may be a small low power processor in the case of an MS, or a high power, high speed processor in the case of a BS.

  The processor has a memory bus coupled to memory 56, such as magnetic, optical, or solid state memory, or some combination thereof. The memory includes program instructions and user data that can be transmitted and received between stations. Account data 58 may also be connected to the bus. For MS, account data 58 may include SIM (Subscriber Identity Module) and other stored personal parameters. For BS, account data 58 may include an account authentication database or a connection to such a database.

  A series of sensors 54, such as a position sensor, battery or power sensor, camera and microphone, and transceiver signal sensor, are coupled to the processor to provide additional data to the processor.

  A user interface bus, such as a USB (Universal Serial Bus) or another type of user interface connection, includes a processor and a user interface 60 such as a keyboard, touch screen, mouse, trackball, or other interface, a display 62 and other devices. The other connector 64 that enables the connection is connected. A particular user interface may be adapted to suit a particular application. The user can enter or attach text or other short messages via the user interface and can use the interface for system maintenance and control. For MS, the user can record via the interface using a microphone and camera and be instructed to send them to a specific user or group of users using a keyboard or touch screen. You can attach it to a short message.

  The processor 52 is coupled to another communication bus for communication with other devices. The wired interface 66 allows the BS to communicate with other BSs, gateways, base station controllers, operations and maintenance centers, and the like. With respect to the BS, the wired interface can allow network connectivity and portable devices, and may allow the device to be coupled to a personal computer for updates and maintenance. The communication bus also provides a wired or wireless connection to a personal area network (PAN) 68 such as Bluetooth, a local area network (LAN) 70 such as Wi-Fi, a wide area network 72 such as 802.16m, or an urban network. More or fewer network adapters may be provided depending on the application. Some network functions may be integrated or separated. Various communication protocols and configurations may be used.

  Wide area network (WAN) adapter 72 includes logic 74 for generating, assembling, encoding, encrypting and queuing packets transmitted over the WAN. The logic is coupled to a transceiver 76 that modulates, encodes, and amplifies packets from the logic for signal transmission over the antenna 78 over the WAN. The antenna may have one or more parts depending on performance, cost and design considerations. The same transmit chain may also function as a receive chain, or a separate receive chain (not shown) may be used. The receive chain may perform the reverse functions of receive demodulation, amplification, analysis and decoding, etc., in order to obtain data sent back to the processor over the communication bus.

  When receiving a packet containing a control message, the message is sent to the processor and is then used to adjust operating parameters, call a routine for registration, initiate a call, and the like. When receiving a packet containing a user message, the message is sent to the processor and then provided to the user on the display. In any case, the message may be stored in memory.

  The configuration of FIG. 5 may also be applied to portable or desktop computers with wireless adapters. The WAN adapter 72 may be provided as a separate part on a USB, PCI (peripheral component interconnect) bus, or other suitable bus, or may be provided as an internal system part.

  From the example described here, a communication station 50 with fewer or more elements may be desirable for a particular implementation. Thus, the configuration of the system will vary from embodiment to embodiment depending on many factors such as cost constraints, performance requirements, technical improvements, and / or other circumstances.

  Although the forms of the invention have been described in the context of 802.11m and its communication protocols and specific messages within the standard, the invention is not so limited. The form of the present invention applies to other communication protocols and other types of control messages in 802.16m and other protocols to transmit short user messages with little impact on overall system operation. May be. This description is related to SMS, but may be applied to a variety of different short user messages. SMS is also frequently sent from one mobile phone to another, but users send text using phone-connected devices such as WiFi, Internet, portable and desktop computers, phones, and media players. can do. A remote data terminal, as described herein, or a remote terminal may represent such a device.

  Although the steps described herein may be performed under the control of a programmed processor such as processor 52, in other forms these steps may be folded program gate array (FPGA), TTL logic, or application specific integration. It may be implemented in whole or in part by any pluggable or hard coded logic, such as a circuit (ASIC). Also, the method of the present invention may be performed by any combination of programmed general purpose computer components or custom hardware components. Accordingly, this description is not intended to limit the invention to the specific form in which the described steps are performed by a particular combination of hardware components.

  The present invention is a computer program product that can include a machine-readable medium having instructions stored therein that can be used to program a computer (or other machine) to perform steps in accordance with the present invention. May be provided as Machine-readable media include, but are not limited to, floppy disks, optical disks, CD-ROMs, and magneto-optical disks, ROM, RAM, EPROM, EEPROM, magnetic or optical cards, flash memory, or electronic instructions. Any other type of media suitable for storage may be included.

  In the description, for the purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention may be practiced without some of these specific details. In other instances, well-known structures and devices are shown in block diagram form. This particular detail can be supplemented by one of ordinary skill in the art in a form suitable for a particular implementation.

  While this description has described in detail several exemplary forms of the invention, it should be understood that the invention is not limited to the precise forms described. Accordingly, the specification and drawings are not intended to be limiting, but are intended to be illustrative. Various applications, improvements and modifications may be made without departing from the scope of the invention as defined in the appended claims.

Claims (20)

From the first radio second radio transmits a first location update control message having including data field short message directed from the first radio of the user to the user of the remote data terminal how to prepare for the stage. The method of claim 1, wherein the short message is a text message , a short message service message, or a multimedia message . The method according to claim 1 or 2 , wherein the data field is allocated for use for the first location update control message. The method according to any one of claims 1 to 3, wherein the first location update control message is a media access control message. The method of claim 4 , wherein the media access control message is used for connected mode and standby mode media access control operations. Receiving a page from the second radio;
It said step of transmitting a first location update control message, the method according to any one of claims 1 to 5 is intended to meet the reception of the page. The method according to any one of claims 1 to 6, further comprising encrypting the short message in an application layer before sending. The method according to any one of claims 1 to 7, wherein the first location update control message is a ranging message for determining a location of the first radio. The first radio is a mobile station;
The second radio is a base station;
9. The method of claim 8, wherein transmitting the first location update control message comprises transmitting an RNG-REQ message as the first location update control message. 10. The method according to any one of claims 1 to 9, wherein the data field includes a TLV type and subtype for identifying containing a user message. In response to the first location update control message, receiving a second location update control message having a data field including a response to the short message from the second radio.
The method according to claim 1, further comprising: The first radio is a mobile station;
The second radio is a base station;
Sending the first location update control message comprises sending an RNG-REQ message as the first location update control message;
The method of claim 11, wherein receiving the second location update control message comprises receiving an RNG-RSP as the second location update control message. The method according to claim 11 or 12, wherein the second location update control message is an acknowledgment of the first location update control message. The method according to claim 11, wherein the response is a second short message from the remote data terminal. The program for making a computer perform the method as described in any one of Claims 1-14. A processor for generating a first location update control message having a data field including a short message directed from a user of the first radio to a user of the remote data terminal ;
An apparatus comprising: a transceiver that transmits the first location update control message from the first radio to a second radio. The apparatus of claim 16 , wherein the processor further encrypts the short message at an application layer before transmitting. The apparatus according to claim 16 or 17 , wherein the data field is allocated for use for the first location update control message. The apparatus according to any one of claims 16 to 18, wherein the first location update control message is a ranging message for determining a location of the first radio. The apparatus according to any one of claims 16 to 19, wherein the data field includes a TLV type and subtype for identifying containing a user message.

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