MXPA98004220A - Transmission of package data using dynamic assignment of ca - Google Patents

Abstract

The present invention relates to a method for transmitting packed data in a cellular communication system using a dynamic channel allocation system. In this aspect of the invention, a data control channel is used in addition to the data traffic channel. The final mobile system uses the data control channel to send a request for allocation of a channel for data transmission - such as a particular frequency / time interval in a TDMA system. The network responds with the identification of a particular channel that can be used during a particular period of time to transmit data. In this aspect of the invention there is no dedicated channel that is used for data transmission. In addition, the network determines a channel that will be free for the specified period of time and assigns this for the transmission of data.

Description

TRANSMISSION OF PACKAGE DATA USING DYNAMIC CHANNEL ALLOCATION DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to the transmission of packet data over vacant channels in cellular networks.

BACKGROUND OF THE INVENTION The transmission of data over cellular networks has been achieved with high efficiency by transmitting the data in packaged form over vacant voice channels. A variant of this technique is the Digital Packet Data protocol Cellular CDPD (Cellular Digital Packet Data) which has been implemented in analog cellular networks such as the Advanced Mobile Phone System (Advanced Mobile Phone System) (AMPS). See, for example, the United States Patent No. 5,404,392. In this implementation, a pair of channels is assigned to the CDPD protocol - one channel for forward transmissions and the other for reverse transmissions. On the broadcast channel, the station is continuously transmitting information that the mobile stations verify to detect, synchronize with and record on, the CDPD channel. When it is in online power, the mobile unit sweeps the channels, REP: 27485 When switched on, the mobile unit scans the channels, locates the broadcast channel, and registers it with the system. If the mobile unit wishes to transmit data, it uses the reverse channel which is identified during the power up process. Since there is an inverse channel that is shared by a multiplicity of mobile users, access to the channel is obtained through the use of well-defined containment resolution mechanisms that avoid or resolve collisions. Once a particular Mobile-End System (M-ES), such as a cellular data transceiver, has access to the channel, it can use the channel to transmit data until it has completed its transmission or has used the channel for a maximum configurable time period of the system. The more advanced cellular networks will operate using digital instead of analogue transmission and suggestions have been made to transmit packaged data over vacant channels in those systems as well. By analogy with the application of the CDPD to analog systems, the packaged data can be sent over an exemplary TDMA system by dedicating specific frequency / time slot channels to the transmission of the packaged data. In such a system, forward and reverse transmission could take place in those dedicated channels in a manner similar to that described above for the CDPD in the AMPS. Similarly, in the reverse transmission, contention resolution mechanisms could be used to send or resolve collisions. Those suggestions, however, carry with them the inherent inefficiencies of the CDPD on the AMPS. For example, an integral number of channel pairs can be dedicated to data transmission, and containment resolution mechanisms should be used on the reverse channels that are used for data transmission to avoid or resolve collisions.

Brief Description of the Invention In one aspect of this invention, packaged data is transmitted in a cellular communication system using a dynamic channel allocation scheme. In this aspect of the invention, a data control channel was used in addition to the data traffic channel. The final mobile system uses the data control channel to send a channel assignment request for data transmission - such as a particular frequency / time interval in a TDMA system. The network responds with the identification of a particular channel that can be used during a particular period of time to transmit data. In this aspect of the invention there is no dedicated channel that is used for data transmission. Rather, the network determines a channel that will be free during the specified time period and assigns it to a specific mobile system for the transmission of data. This aspect of the invention - which we call "dynamic channel allocation" - allows a much more efficient use of the available communication channels. In addition to dynamic channel allocation, another aspect of the invention allows assigning more than one channel for data transmission, if more than one is available. This aspect of the invention - which we call "dynamic availability of multiple channels" - allows a more flexible use of communication channels for data transmission, when available. An implementation of this aspect of the invention contemplates the simultaneous use of at least two channels available for the transmission of data to increase the efficiency of the network. Of those at least two channels can be used by different final mobile systems, or they can be used at the same time by a final mobile system to transmit data more quickly and make even more efficient use of the multiple available channels. Other aspects of the invention include the Automatic Requested Request (ARQ) algorithm of the packaged data traffic channel, with which the efficiency of the packet data control channel is significantly increased, and the use of a priority field to allow the selective processing of the data request. Additionally, the data control function can be performed on the available voice control channel or it can be performed on the dedicated data control channel. Although the invention has been introduced, and can be discussed in the sections of this specification, in terms of a TDMA modality, those skilled in the art will recognize that the principles of the invention can be advantageously used with other air interconnect protocols as well, and that such complements were contemplated within the broad scope of the invention.

Brief Description of the Drawing FIGURE 1 is a schematic representation of the reverse channel access with dynamic channel allocation; FIGURE 2 is a schematic representation of the access of the broadcast channel with dynamic channel assignment; FIGURE 3 is a diagram in the M-ES state of one embodiment of the invention; FIGURE 4 is a schematic representation of the time interval format of the reverse digital traffic channel; FIGURE 5 is a schematic representation of the time slot format of the digital traffic broadcast channel; FIGURE 6 shows the operation as a function of traffic attempted with different numbers of data traffic channels; FIGURE 7 shows the total functioning through an Aloha divided into tiendo intervals and a persistent CSMA / CD.

Detailed Description of the Drawing 1. Acronyms The following acronyms will be used in the specification. BCCH Emission Control Channel (see EIA / TIA IS-136 which is incorporated here as a reference) CDL Coded Digital Control Channel Locator (see IS-136) CDPD Data from Cellular Digital Packet (see CDPD System Specification, Release 1.1 which is incorporated herein by reference) DS Decoding State, which indicates whether the decoding was successful or failed E-BCCH Extended Emission Control Channel (see IS-F-BCCH Rapid Control Channel of Issuance (see IS-136) FPCCH Packet Control Emission Channel in the DCCH MDBS Database Station (which may be an element of a base station as defined by the CDPD) MDLP Link Protocol of Mobile Data (see System Specification, Release 1. 1, Part 403) MNLP Mobile Network Location Protocol (see CDPD Part 501) MNRP Mobile Network Registration Protocol (see CDPD Part 507) PDCCH Packed Data Control Channel, which consists of the FPDCCC and the RACH RPDCCH Random Access Channel (see IS-136) RRM RRMCH Radio Resource Management RRMCH Radio Resource Management Channel F-BCCH SACCH Slow Associated Control Channel (see IS-136) S-BCCH Short Message Control Channel Services Brief (see IS-136) SCF Control Feedback Information Shared SMP Security Management Protocol (see CDPD Part 406) TDMA Time Division Multiple Access. 2. General View One aspect of the invention contemplates the transmission of packaged data in a cellular communication system using a dynamic channel allocation scheme. (The term "channel" as used in this specification refers to the set of parameters that identify a transmission path, for example in the TDMA, a channel is defined by a frequency, time intervals and transmission period). The method involves two types of channels: packet data control channel and packet data traffic channel. The packet data control channel consists of a packet data control transmission channel and a packet data control channel. Similarly, the packet data traffic channel consists of a packet data traffic broadcast channel and a packet data traffic reverse channel. Although the invention can be practiced in any number of protocols such as AMPS, CDMA, FDMA, etc., the description is often given in terms of a specific TDMA mode. In such a description of a TDMA embodiment of the invention, the common terms "digital control channel" and "digital traffic channel" are given.In the generic description of the invention, however, the terms "control channel" will be used. packet data "and" packet data traffic channel. "In reverse data transmission a final mobile system first sends a request message on the packet data control channel to, for example, a Mobile Digital Base Station ( Mobile Digital Base Station) (MDBS). (To be recognized, however, that the use of the MDBS for this function is not necessary for the practice of the invention. Instead, this function can be performed, for example, anywhere in the network). The final mobile system can gain access to the reverse packet data control channel by contending with other final mobile systems using, for example, the access mechanism of the Aloha channel divided into time slots. If the access is successful, the final mobile system can send your request for data transmission. In response, the MDBS can send a reply message to the final mobile system of the packet data control broadcasting channel. If the transmission request is approved, the response message may contain the packet data traffic channel information for the transmission of data from the final mobile system, for example, the allocated packet data traffic channel and the time in the assigned channel to transmit the packet data. If the request for transmission is denied, the response message may contain the reason for the denial. After the final mobile system receives the response message, it switches to the assigned packet data traffic channel at the assigned time intervals, and during the assigned time interval, data transmission begins. When the MDBS receives a block of data from the final mobile system, it can send the Decode Status (DS) in the associated packet data traffic broadcast channel. The final mobile system can verify the decoded state information on the associated packet data traffic broadcast channel to determine whether each block was successfully transmitted or not. The final mobile system can retransmit those data blocks with a DS indicator indicating that the decoding failed during the allocated time intervals. When the allocated time intervals are exhausted, the final mobile system must cease transmission regardless of the number of data blocks successfully transmitted. If the final mobile system has one or more blocks of data to send, you can request permission for a new transmission through the reverse packet data control channel. After transmitting the data blocks, the final mobile system returns to the verification status of the packet data control broadcasting channel.

In the forward data transmission the MDBS sends a request message to one or more final mobile systems on the packet data control broadcast channel to inform the final mobile system to listen to a packet data traffic broadcast channel particular at certain time intervals. Each such final mobile system switches to the packet data traffic channel in the allocated time slots, and receives the data blocks transmitted in those time slots. In each of the blocks of the packet data traffic broadcasting channel, an Immediate Recognition (IA) indicator may exist. That indicator is generally only used for full speed data channels and digital data transmission. If the indicator is sent, the final mobile system will send the MAC Recognition message to the next block of packet data traffic channel. The final mobile system may or may not recognize all blocks of the packet data traffic broadcast channel in the packet data traffic channel. If not, the final mobile system can send the MAC Recognition message in the reverse channel of packet data control. Since MDBS dynamically allocates packet data traffic channels to final mobile systems to transmit data packets, those channels are free of containment. In this way, the effective data rate in each packet data traffic channel can potentially reach 100% of the effective throughput capacity. For example, a TDMA cellular sector contains approximately 15 30 kHz channels or 45 digital TDMA channels. Assuming that 30 digital channels are used for voice services, and the ratio of packet data control to packet data traffic channel is 1: 4, then 12 reverse packet data traffic channels are available. Since each packet data traffic inverse channel offers a data rate of approximately 9 Kbps, the total effective data rate of the reverse packet data traffic channel is 108 Kbps. Similarly, each transmission channel of packet data traffic offers a data rate of approximately 9 Kbps and the total effective data rate of the packet traffic data channel is 108 Kbps. FIGURES 1 and 2 show the access of the reverse and broadcast channel with assignment channel dynamics. As noted in FIGURES 1 and 2, the final mobile system can use the reverse packet data control channel to transmit Data Channel Request messages (MAC_DC_REQ), while the MDBS can use the control emission channel of packet data to transmit data change response messages (MAC_DC_RESP) and Data Emission Channel Request messages (MAC_DC_REQ). The final mobile system and the MDBS can use the packet data traffic channel to transmit data packets. The reverse packet data control channel may reside in the digital control channel of the standard TDMA or in a separate reverse channel. When the reverse packet data control channel resides in the reverse digital control channel, the reverse packet data control channel may employ the CSMA channel access protocol described in the IS-136 RACH, which is incorporated here as a reference When the reverse packet data control channel resides in a separate reverse channel, the reverse packet data control channel may employ, for example, the Aloha channel access protocol divided into Time Intervals. The above description of the particular embodiment of the invention is described in greater detail in the state diagram of FIGURE 3. In that diagram, 31 shows that the entity of the MAC layer within a final mobile system is in the Null state if the final mobile system is off. When it's on, the final mobile system enters the Scan and Search state of the Control Channel described in 32. The MAC layer entity within the final mobile system is in the Scan and Control Channel Search state when it is in the process of select a candidate service provider (see Section 6.2.2 of IS-136.1, which is incorporated herein by reference). If the candidate packet data control channel meets the criteria described in the Control Channel Selection procedure, the final mobile system enters the packet data control channel packet state 33. Otherwise, the mobile system final looks for another candidate packet data control channel. If a shutdown condition occurs while in this state, the final mobile state attempts to return to the newly used control channel during its current generation cycle and sends an Off Log if required through the control channel. After entering the state of Camping of the Packet Data Control Channel, 33, from the Scanning and Searching Status of the Control Channel 32, or for the first time on the current packet data control channel as a result of the reselection of the control channel, a le system final makes an initial reading of a whole cycle of F-BCCH and E-BCCH. A le end system in this state does not attempt to access until it has completed the initial reading of a complete cycle of F-BCCH (see Section 6.2.3 of IS-136.1, which is incorporated herein by reference). After completing its initial reading of F-BCCH, the final le system leaves its state in response to a request for packet data control broadcasting channel, a packet data control reverse channel request or a RRMCH notification . The entity of the MAC layer within a final le system is in the Answer Wait state, 34, after which it sends a reverse channel request message of packet data control to the MDBS. After entering this state, the final le system sets the response timer of the reverse packet data control channel. The final le system responds to the following conditions as indicated: The packet data control emission channel responds to the message - if the reply message is received from the packet data control transmission channel with the accepted access, the final le system proceeds to the state of Data Transmission Procedure, 37. If the reply message of the packet data control transmission channel with rejected access is received, the final le system returns to the state of Control Channel Tunneling. Packet data. End of the delay interval RMPDU_REQ_TMR: - if the final le system has sent the request message of the reverse channel of data control of packets MAC_MAX_ATTEMPTS several times, it returns to the state of Packet Data Control Channel. Otherwise, RMPDU_REQ_TMR is reset, the message counter increments, and retransmits the reverse channel request message of packet data control. The entity of the MAC layer within the final le system is in the status of Data Reception Procedure, 35, after which it receives a request message of the packet data control broadcasting channel of the MDBS. After entering this state, the final le system opens a data packet traffic channel according to the information of the data packet control issuance channel request message and listens to the data traffic broadcasting channel of the data packet. packages in the assigned time intervals. The MAC layer entity within the final le system is in the status of RRM Update Procedure, 36, after which it receives a RRM notification message from the MDBS. After entering this state, the final le system updates its parameters and radio resources.

Automatic Review Request Algorithm of the Inverse Packet Data Traffic Channel (ARQ) In the access of the reverse packet data traffic channel, the final le system transmits a sequence of blocks in the pre-assigned channel and the channel type. After transmitting each data block, the final le system checks the Decoded State indicator in, for example, the packet data traffic broadcast channel to determine if the data blocks are transmitted. If the transmission of the data block fails, the final le system can retransmit the same block until the transmission of the data block is successful, or the assigned channel duration is exhausted, or the same data block has been transmitted 5 times, including the first time. When the MDBS receives a first attempt, it decodes the data block. If the data block is successfully decoded, the MDBS will place "Successful Decoding" on the DS indicators. If the data block can not be decoded successfully, the MDBS will place "Failed Decoding" on the DS indicators. When the MDBS receives the second attempt, it decodes the data block. If the data block is successfully decoded, the MDBS will place "Successful Decoding" on the DS indicators. If the data block can not be decoded successfully, the MDBS will place "Failed Decoding" on the DS indicators. When the MDBS receives a 3rd attempt, it decodes the data block. If the data block is successfully decoded, the MDBS will place "Successful Decoding" on the DS indicators. Otherwise, the MDBS will combine the 3 blocks of data received using a "majority vote of all bits" algorithm and decode the combined block. If the combined data block is successfully decoded, the MDBS will place "Successful Decoding" on the DS indicators. If the combined data block can not be decoded successfully, the MDBS will place "Failed Decoding" on the DS indicators. When the MDBS receives the 4th attempt, it decodes the data block. If the data block is successfully decoded, the MDBS will place "Successful Decoding" on the DS indicators. Otherwise, the MDBS will combine the last 3 blocks of data received using a "majority vote of all bits" algorithm and decode the combined block. If the combined data block is successfully decoded, the MDBS will place "Successful Decoding" on the DS indicators. If the combined data block can not be decoded successfully, the MDBS will place "Failed Decoding" on the DS indicators. When the MDBS receives the 5th attempt, it decodes the data block. If the data block is successfully decoded, the MDBS will place "Successful Decoding" on the DS indicators. Otherwise, the MDBS will combine the last 5 blocks of data received using a "majority vote of all bits" algorithm and decode the combined block. If the combined data block is successfully decoded, the MDBS will place "Successful Decoding" on the DS indicators. If the combined data block can not be decoded successfully, the MDBS will place "Failed Decoding" on the DS indicators. At the access of the packet data transmission channel, the retransmission algorithm is similar to that of the packet data traffic reverse channel access, except that the reverse packet data traffic channel does not contain DS indicators. Instead, the final mobile system transmits the MAC recognition block to recognize the received state.

Analysis of Operation of a Specific Modality The following performance analysis for this invention in a TDMA environment was divided into two parts: physical and MAC layer operation analysis. In the physical layer, the total operation is the maximum speed of transmission of uncoded data in the emission and inverse channels. In the MAC layer, the total performance is the normalized performance capability using the MAC layer protocol. Operation of the Physical Layer The practice of this invention in a TDMA environment requires that the data control channel and the data traffic channel transmit data packets both forward and backward. The block structure of the data control channel can be the same as in the IS-136. The block structure of the data traffic channel can be modified. Based on a recent analysis by Secuta (Alan Secuta, "RLP Performance Report", Contribution No.

TR45.3.2.5 / 93.08.23.07, August 5, 1993), it seems that the active convolutional code with a speed of 5/6 (obtained from the convolutional code with a speed of 1/2) offers a substantial total improvement over the convolutional code with a speed of 1/2. At a BLER of 0%, the convolutional code with a speed of 5/6 offers 10 Kbps in the digital full-speed channel. In the Secuta analysis, 12% of the site coverage of the cell has 17 dB C / l or less, and 81% of the site coverage of the cell has 22 dB C / l or more. Effective yield levels at 17 and 22 dB C / l are approximately 7.8 and 9.2 Kpbs, respectively. At both signal levels C / l, the convolutional code with a speed of 5/6 offers better total performance than the convolutional code with a speed of 1/2. In addition, the convolutional code with a speed of 5/6 offers approximately 5.3 Kbps even at 14 dB C / l. The following table compares the total and BLER operation of different coding schemes.

Table 1 - Uncoded Data Transfer Rate of the Inverse Digital Traffic Channel As noted in the above table, the final mobile system transmits over the reverse packet data control channel and the reverse packet data traffic channel. The final mobile systems use the packet data control channel to transmit control and short data packets. The final mobile systems use the reverse packet data traffic channel to transmit data packets. Because the packet data traffic reverse channel access is allocated dynamically by the MDBS, no collision occurs in the reverse packet data traffic channel. The final mobile system must send blocks of data in the assigned TDMA intervals. If the allocated ranges are not sufficient for all data blocks that must be transmitted, the final mobile system may request another reverse channel access of packet data traffic to transmit the rest of the data blocks. When a final mobile system requests intervals for data transmissions, the MDBS assigns a maximum of 31 TDMA slots for access to the packet data traffic channel at full speed, or approximately 95 TDMA slots for accessing the data traffic channel of triple-speed packages. FIGURE 4 shows the time interval format for the reverse packet data traffic channel. Each digital channel consists of 2 time slots in each 6-slot TDMA block. Each TDMA interval consists of 324 bits or 6.67 msec, and contains a 260-bit coded data field. The semi-duplex final mobile systems, each final mobile system can occupy a 2-slot data traffic channel (at full speed) to transmit data. For half-duplex final mobile systems, each final mobile system can occupy the 6 TDMA slots (ie 3 reverse channels of packet data traffic) to transmit data. In this way, the maximum data rate for semi-duplex end mobile systems is 30 Kbps. The MDBS transmits control and recognition packets over the packet data control broadcast channel and transmits packets of data over the packet data traffic channel . FIGURE 5 shows the time slot format of the packet data traffic broadcasting channel. Each TDMA interval consists of 324 bits, in which 260 bits are encoded data. The unencoded data rate of the packet data traffic broadcasting channel is the same as that of the reverse packet data traffic channel. Some of the fields in the forward and backward time slots can be converted to a data field, such as SACCH, CDVCC, RSVD, and CDL depending on the impact of such conversion on the standard TDMA operation. For both half duplex and full duplex mobile systems, they can receive data in all 6 TDMA slots (ie, 3 packet data traffic broadcast channels). Thus, the forward data transfer rate is 30 Kbps. If the SACCH, CDVCC, RSVD, and CDL fields are converted to the data field, the maximum forward data rate is approximately 34.5 Kbps.

MAC layer Both the MDBS and the final mobile system use the packet data control channel to transmit control and acknowledgment packets and use the packet data traffic channel to transmit data packets. Since the broadcast channel is an access from one point to multiple points, the MDBS can fully utilize the packet data control broadcast channel and the packet data traffic channels. The inverse packet data control channel is a point-to-multipoint access, the final mobile systems contend for the reverse packet data control channel with others using, for example, the Aloha random access scheme divided into intervals of time or the RACH access scheme (CSMA not persistent). When the reverse packet data control channel receives the digital control channel, the RACH access scheme is used. When the reverse packet data control channel occupies a separate channel, the Aloha protocol divided into time intervals can be used to optimize the overall operation. FIGURE 7 describes the total functioning of the Aloha divided into time intervals and the non-persistent CSMA / CD. If the access to the reverse packet data control channel is successful, the MDBS will send a response packet to the final mobile system and inform the final mobile system to a data traffic channel to which it is assigned. Next, the final mobile system will transmit data packets on the reverse channel of allocated packet data traffic without any collision of the packets. The normalized performance equation of the Alona divided into time intervals, Src, is given as: Src = Ge ~ G where G is the traffic attempted on the reverse channel of packet data control. If N is the number of data traffic channels, and Lr is the average length of the data packet over the reverse data traffic channel, the normalized performance equation for each reverse packet data traffic channel, Scd / is Srd = MIN. { GLre "G / N, 1.0.} FIGURE 6 shows the total operation of the reverse traffic data channel with different N where Lr is 8 length intervals.The packet data control emission channel contains packets of Emission Request (F-Req) and Emission Response (F-Resp) The MDBS transmits the F-Req to inform one or multiple end mobile systems that have been sent one or more blocks to the final mobile systems through a certain packet data traffic transmission channel, and transmits F-Resp to answer the final mobile system transmission request that the final mobile system must transmit over the reverse channel of allocated packet data traffic. bandwidth of the packet data control transmission channel used by other services, such as F-BCCH, E-BCCH, and S-BCCH and Lf is the average length of the data packet over the traffic emission channel of packet data, then the The normalized performance equation for each packet data traffic emission channel, Sfd, is given by: Sfd = IN. { (l-Src-S0) Lf / N, 1.0} Primitive Services There are three primitive services that may be necessary to practice this invention in the TDMA environment. These primitive services are required by the MDBS and the final mobile system to have access to the packet data control channel and the packet data traffic channel. These primitive services are MAC_DC_REQ, MAC_DC_RESP, MAC_DT_DATA. The primitive MAC_DC_REQ is used by the MDBS or the final mobile system to request a data transmission on the packet data control channel. This primitive can contain options for sending short data blocks, RR (defined in the MDLP specification, CDPD release 1.1, which is incorporated here as a reference), EKE and IKE (defined in the SMP specification, CDPD release 1.1), ESH and ISC (defined in the MNRP specification, CDPD release 1.1). The primitive MAC_DC_REQ contains the following mandatory fields: color code (area and group colors), data packet size (in TDMA intervals), type of requested data channel (half-speed, full-speed, dual-speed) , triple speed, etc.). The primitive MAC_DC_RESP is used by the MDBS to respond to the final mobile system of origin if the request for data transmission is accepted. If accepted, the MDBS will assign a packet data traffic channel for a specified duration, in the TDMA intervals. The type of data channel assigned may be equal to or less than the type of data channel requested. The primitive may contain option data to use short data blocks. The MAC_DC_RESP primitive contains the following mandatory fields: color code, assigned channel type, transmission start time, assigned data channel (RF channel number specification and digital channels). The primitive MAC_DT_DATA is used by the MDBS and the final mobile system to transmit a burst of data to a preassigned RF channel, channel type and time intervals. Preceding this primitive, the primitive MAC_DC_REQ must be sent to request the transmission of data. The following table summarizes the primitives of the MAC layer.

Table 2 - Primitives of the MAC layer Primitive Path Fields Size Description (bits) MAC_DC_REQ both code of 8 color codes color area and group color size of 8 packet size data packet requested data in TDMA intervals. If it is equal to 0, data channel assignment will be requested. type of the 3 type of data channel channel requested, data that is, half speed, full speed, double speed, etc. speed of 1 transfer speed data transfer requested, that is, slow or fast priority 1 data priority, that is, high or low option < N-21 contains a short data block or other information Table 2 - Primitives of the MAC Layer (continued) Primitive Path Fields Size Description (bits) MAC_DC_RESP To code of 8 color codes of forward color area and group color size of 8 packet size packet of data assigned data time of 8 start time of start data transmission assigned, that is, without intervals after this response block duration of 8 transmission of the assigned data transmission duration data type of 3 type of assigned channel data channel, must be less than or equal to the type of data channel requested speed of 1 transfer speed data transfer assigned data , must be less than or equal to the requested data transfer option < N-28 contains a short data block or other information MAC-DT-DATA Both Code of 8 color codes color area or group color data N-8 data field It has been noted that in the primitive MAC_DC_REQ there is a field that allows you to set a priority code for the data that goes to be transmitted. This code can be used to identify the transmission of data by special treatment, for example, to assign a traffic channel to that data transmission before the others.

Management of Radio Resources The MDBS sends RRM information to the final mobile systems through the RRMCH. The RRMCH was created to offer CDPD RRM services, and may reside in the Reserve Channel of the data control channel. The RRM protocol consists of the following functions. Autonomous registration; switching channel, intracell transfer, intercell transfer; measurement of channel qualities, such as BER and RSSI; location management of the mobile station; update of the information of the adjacent channel; congestion control and automatic shutdown control. The RRM protocol, provided in Part 405 of the CDPD 1.1 specification, can be used for the RRP protocol of the CDPD / TDMA with minor modifications. This RRM protocol can provide the same coverage as the TDMA to operate hands-free simultaneously between the voice and data services.

Mechanisms of Access to the Inverse Channel The following table summarizes the characteristics of the different access mechanisms to the channel.

Restore the Characteristics of the Different Channel Access Mechanisms Protocol Capacity of Comments Normalized Performance (%) Alona divided 36% only packets in fixed-time intervals DSMA no 17, 28, 35, 40, allows packets of persistent 58%, for packets several sizes divided into 1, 2, 3, 4, 10 time interval intervals DSMA / CD does not 23, 37, 47, 54, 75% allow packets of persistent packets of 1, several sizes divided into 2, 3, 4, 10 time interval intervals DSMA / DC not ~ 10-20% smaller than allowed persistent packets with the DSMA / CD not several sizes, delay a persistent access interval shorter than time divided in the DSMA / CD not intervals of persistent divided in time intervals of time DSMA / CD not less than that of persistently allows packets of DSMA / CD not several sizes, the interval of persistent data operation time with divided into unbalanced favors reservation of intervals to heavy users time Summary of the Characteristics of the Different Access Mechanisms of Canal (continuation) Advantageous Features of the Invention The following advantages are among those that derive from the practice of the invention described, for example, in a TDMA environment: 1. The physical layer of the block synchronization remain the same as in the IS- 136 In this way, the IS-136 compatible mobile phone can support both voice and data services without equipment changes. 2. Since the physical layer of the IS-136 is used and most of the CDPD protocol layers are used (DLP, SNDCP, MNRP, SMP, etc.), the design effort required to offer data services on the TDMA in accordance with this invention it is minimal. However, the operation analysis of the IS-136 over PCS channels is required. 3. The convolutional code (perforated) can be used with a speed of 1/2 and with a speed of 5/6 for FEC. The effective data transfer rate over the full-speed data transmission and reverse channels is 10 Kbps. The current TDMA mobile telephone (equipment IS-136) can be reprogrammed to support data services in accordance with this invention. 4. In the CDPD / AMPS, the half-duplex CDPD modem suffers significant operational penalties because it can only transmit one block at a time and may lose the broadcast channel traffic while it is being transmitted. In this invention, the half-duplex CDPD modem occupies a full-speed digital channel when transmitting in the reverse data channel. The maximum data transfer rate of the reverse channel is approximately 10 Kbps, and the maximum data transfer rate of the broadcast channel is approximately 30 Kbps. Also, the modem does not lose the traffic of the broadcast channel unless it loses the FDC allocation package. The half-duplex CDPD modem can increase the data transfer rate of the reverse channel to approximately 30 Kbps. 5. The aggregate throughput capabilities of the reverse broadcast channels in this invention is 200% greater than that of the reverse and send channels in the CDPD / AMPS. 6. In accordance with this invention, a final mobile system can simultaneously verify both voice and data (long and short messages) without degrading voice or data services. 7. An MD-IS can support MDBS for the transmission of data in AMPS, and in accordance with this invention, in other protocols such as, for example, DMA. In TDMA mode no changes are required for the SNDCP layer and above. In the MDLP layer, only the parameter values may be required to change. 8. In the CDPD / AMPS, the maximum blocks of the MAC layer transmitted are 16 and the minimum free time is 30 micro-ranges. These parameters are tuned to provide quick access to all mobile users. However, these parameters reduce the total operation for each final mobile system. When this invention is used in a TDMA environment, for example, the maximum block size can be much larger than 16 and the minimum time is not required. These new parameter values allow each final mobile system to maximize its data transmission rate from the reverse channel. 9. In the exemplary embodiment of this invention in a TDMA environment, the MDBS has complete control of the channel arrangement. This can assign all voice channels not used for data services. If none of these channels are required for voice services, the MDBS can reassign some of those channels not used for voice services and block them for data services. In the variation by channel jumps, the CDPD / AMPS voice channels pre-empt the data channels causing variation by jumps, in this embodiment of the invention the data channels that are assigned are reserved during the entire allocation period. 10. The aggregate performance capability of this invention when practiced in a TDMA environment is significantly greater than that of the CDPD / AMPS. For example, if 5 RF channels of a 15-channel RF sector are not used by the TDMA voice services, the aggregate throughput capacity is approximately 216 Kbps (reverse + broadcast channels) which is approximately 10 times the performance capacity of the CDPD / AMPS.

It is noted that in relation to this date, the best method known to the applicant to carry out the aforementioned invention, is that which is clear from the present description of the invention. Having described the invention as above, property is claimed as contained in the following:

Claims (20)

1. A method for sending packaged data over a communication network, characterized in that it comprises: a) transmitting, on a packet data control channel, a request to send packaged data; b) determining at least one available packet data traffic channel and time interval during which the packaged data can be sent; c) transmitting the request, on the packetized data control channel, identifying at least one available packet data traffic channel and the time interval during which the data can be sent; and d) transmitting the packaged data on at least one packet data traffic channel available during the time interval.

2. The method according to claim 1, characterized in that the communication network is a cellular network, and the cellular network determines at least one available packet data traffic channel and the time interval during which the packaged data can be sent. .

3. The method according to claim 2, characterized in that an MDBS determines at least one available packet data traffic channel and the time interval during which the packet data can be sent.

4. The method according to claim 2, characterized in that more than one data packet traffic channel and time slot are identified for the transmission of the packaged data.

5. The method according to claim 2, characterized in that a final mobile system transmits the packaged data over at least one available packet data traffic channel during the time interval.

6. The method according to claim 5, characterized in that a mobile, digital base station transmits the packaged data on more than one data packet traffic channel and time interval, and each final mobile system transmits on a data traffic channel. data packets and time interval. 39

7. The method according to claim 5, characterized in that at least two final mobile systems transmit the packaged data on more than one data packet traffic channel and time interval, each final mobile system transmits on a packet traffic channel. data and time interval.

8. The method according to claim 5, characterized in that a final mobile system transmits the packed data on more than one traffic channel of data packets and time intervals.

9. The method according to claim 2, characterized in that the packet data control channel is different from the voice control channel.

10. The method according to claim 2, characterized in that the channels are TDMA channels.

11. The method according to claim 2, characterized in that the channels are CDMA channels.

12. The method according to claim 2, characterized in that the channels are AMPS channels. 40

13. The method according to claim 2, characterized in that, if the data transmission fails, the data is retransmitted on the same traffic channel of assigned packets without reassignment of a data traffic channel.

14. The method according to claim 13, characterized in that the data blocks involved in the failed transmissions, and representing the same data, are combined during the decoding.

15. The method according to claim 14, characterized in that the combined data blocks are decoded using a majority vote algorithm of all the bits.

16. The method according to claim 15, characterized in that the data is decoded by combining at least three failed transmissions.

17. The method according to claim 16, characterized in that in each failed transmission after the second failed transmission, the last three transmissions are combined in the decoding process, until at least five transmissions fail.

18. The method according to claim 2, characterized in that at least one available data traffic channel is determined, at least in part, based on the contents of a priority field transmitted with the request.

19. A method for transmitting data over channels not used in a TDMA cellular communications network, characterized in that it comprises: a) transmitting, by means of a final mobile system, on a reverse packet data control channel, a request to send packaged data; b) determining at a base station at least one reverse TDMA traffic channel available and a time interval during which the packaged data can be sent; c) transmitting, via the base station to the final mobile system, on a packet data control broadcasting channel, the identification of at least one reverse TDMA data traffic channel available and time intervals during which the data they can be sent; and d) transmitting, by means of the final mobile system, the packed data on at least one reverse TDMA data traffic channel available during the time interval.

20. A method for transmitting data over channels not used in a TDMA cellular communication network, characterized in that it comprises: a) transmitting, by means of a base station, on a packet data control transmission channel, a request to send packaged data; b) determining at the base station at least one available TDMA data traffic broadcast channel and time interval during which the packaged data can be sent; c) transmitting, by means of the base station over the packet data control broadcasting channel, the identification of at least one available TDMA data traffic broadcasting channel and time intervals during which the data can be sent; and d) transmitting, by means of the base station, the packed data on at least one available TDMA data traffic broadcast channel during the same time interval.