Disclosure of Invention
Therefore, it is necessary to provide a data transmission method, an apparatus, a computer device, and a storage medium for solving the technical problem that when the current frequency domain or time domain resource is allocated, the wireless resource cannot be dynamically and flexibly allocated to the corresponding service, so that the utilization rate of the wireless resource is low.
In a first aspect, an embodiment of the present application provides a data sending method, where the method includes:
the remote machine sends an access request message to the near-end machine on an access channel; the access request message is used for requesting to establish connection with a near-end machine and requesting to allocate an uplink data transmission channel;
the remote terminal receives a response message sent by the near-end terminal; wherein, the response message carries the resource identification of the uplink data transmission channel;
the remote terminal sends uplink data to the near-end machine on an uplink data transmission channel corresponding to the resource identifier according to a preset uplink physical frame format; wherein, the preset uplink physical frame format indicates that all service data of each remote terminal are transmitted according to the priority of the service QoS.
In one embodiment, the transmission channel comprises a traffic transmission channel; the uplink data sent by the remote machine includes the uplink service data interacted between the remote machine and the near-end machine.
In one embodiment, the transmission channel comprises a training data transmission channel; the uplink data sent by the remote terminal includes a training sequence; the training sequence is used for the near-end machine to perform equalization training.
In one embodiment, the preset uplink physical frame format includes a common physical frame format and a training dedicated frame format; the common physical frame format is used for stipulating the resource positions of an access channel and a service transmission channel; the training dedicated frame format is used to specify the resource locations of the access channel and the training data transport channel.
In one embodiment, the common physical frame format includes: a random access channel, at least one uplink time slot resource of each remote terminal; the uplink time slot resource comprises a pilot frequency domain, a service transmission channel and a first user guard interval.
In one embodiment, the traffic transmission channel includes pilot symbols of a preset length configured at preset equal intervals.
In one embodiment, the random access channel is used for transmitting a random access sequence; the random access sequences of all the remote machines corresponding to the near-end machine are the same.
In one embodiment, the random access channel includes a second user guard interval; the second user guard interval is mapped to a distance between the near-end unit and the far-end unit.
In one embodiment, before the remote device sends the access request message to the near-end device on the access channel, the method includes:
the remote terminal searches for the broadcast signal sent by the near-end terminal; wherein, the broadcast signal comprises the resource identification of the access channel;
if the remote machine searches the broadcast signal, the remote machine sends an access request message to the near-end machine in the access channel; wherein, the access request message comprises the access sequence of the access channel and the remote terminal identification.
In a second aspect, an embodiment of the present application provides a data sending method, including:
the near-end machine receives an access request message sent by the far-end machine;
the near-end machine establishes connection with the far-end machine according to the access request message and distributes an uplink data transmission channel for the far-end machine; the remote terminal sends uplink data to the near-end machine according to a preset uplink physical frame format; wherein, the preset up physical frame format indicates that all service data of each remote terminal are transmitted according to the priority of the service quality QoS.
In one embodiment, before the near-end unit receives the access request message sent by the far-end unit, the method includes:
the near-end machine sends a broadcast signal carrying a resource identifier of an access channel; the broadcast signal is used for the remote terminal to send an access request message in an access channel; the access request message comprises an access sequence of an access channel and a remote terminal identifier;
the establishing, by the near-end device, a connection with the far-end device according to the access request message includes:
the near-end machine verifies whether the far-end machine is legal or not according to the access sequence of the access channel and the far-end machine identification;
if the terminal is legal, the near-end machine establishes connection with the far-end machine.
In one embodiment, the sending, by the near-end unit, a broadcast signal carrying a resource identifier of an access channel includes:
the near-end machine periodically sends a broadcast signal carrying the resource identifier of the access channel; or,
the near-end machine continuously sends the broadcast signal carrying the resource identifier of the access channel, and stops sending the broadcast signal after all the far-end machines corresponding to the near-end machine are accessed.
In one embodiment, the preset uplink physical frame format includes a common physical frame format and a training dedicated frame format; wherein, the common physical frame format is used for stipulating the resource positions of the access channel and the service transmission channel; wherein the training dedicated frame format is used to specify resource locations for the access channel and the training data transport channel.
In one embodiment, the common physical frame format includes a random access channel, at least one uplink timeslot resource of each remote unit; the uplink time slot resource comprises a pilot frequency domain, a service transmission channel and a first user guard interval.
In one embodiment, the traffic transmission channel includes pilot symbols of a preset length configured at preset equal intervals.
In one embodiment, the random access channel is used for transmitting a random access sequence; the random access sequences of all the remote machines corresponding to the near-end machine are the same.
In one embodiment, the random access channel includes a second user guard interval; and the second user protection interval has a mapping relation with the distance between the near-end machine and the far-end machine.
In a third aspect, an embodiment of the present application provides a data transmission apparatus, including:
the first access module is used for the remote terminal to send an access request message to the near-end terminal on an access channel; the access request message is used for requesting to establish connection with the near-end machine and requesting to allocate an uplink data transmission channel;
the response module is used for receiving a response message sent by the near-end machine by the far-end machine; wherein, the response message carries the resource identification of the uplink data transmission channel;
the sending module is used for sending uplink data to the near-end machine on an uplink data transmission channel corresponding to the resource identifier by the far-end machine according to a preset uplink physical frame format; wherein, the preset uplink physical frame format indicates that all service data of each remote terminal are transmitted according to the priority of the service QoS.
In a fourth aspect, an embodiment of the present application provides a data transmission apparatus, including:
the second access module is used for receiving the access request message sent by the remote terminal by the near-end machine;
the management module is used for establishing connection between the near-end machine and the far-end machine according to the access request message and distributing an uplink data transmission channel for the far-end machine; the remote terminal sends uplink data to the near-end machine according to a preset uplink physical frame format; wherein, the preset up physical frame format indicates that all service data of each remote terminal are transmitted according to the priority of the service quality QoS.
In a fifth aspect, the present application provides a computer device, including a memory and a processor, where the memory stores a computer program, and the processor implements the steps of any one of the methods provided in the embodiments of the first aspect and the second aspect when executing the computer program.
In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of any one of the methods provided in the embodiments of the first and second aspects.
According to the data transmission method, the data transmission device, the computer equipment and the storage medium, after the remote machine receives the uplink data transmission channel allocated by the near-end machine, the remote machine transmits the uplink data on the uplink data transmission channel according to the preset uplink physical frame format, and the uplink data are transmitted according to the priority of the QoS (quality of service) of each remote machine during transmission, so that the allocation mode is more comprehensive according to QoS indexes of different service grades of different users, wireless resources are dynamically and flexibly allocated to corresponding services, and the utilization rate of the wireless resources is greatly improved.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The data transmission method provided by the application can be applied to a point-to-multipoint communication system shown in fig. 1, the system comprises a near-end machine and a far-end machine, data interaction can be carried out between the near-end machine and the far-end machine through establishing a communication line, the far-end machine and the near-end machine carry out data interaction through the data transmission method provided by the application, and each far-end machine can be allocated with a plurality of terminal users. In the point-to-multipoint communication system, one near-end machine corresponds to a plurality of far-end machines, and the number of the far-end machines are preset.
The embodiment of the application provides a data transmission method, a data transmission device, computer equipment and a storage medium, and aims to solve the technical problem that when the current frequency domain or time domain resource is allocated, wireless resources cannot be dynamically and flexibly allocated to corresponding services, so that the utilization rate of the wireless resources is low. The following describes in detail the technical solutions of the present application and how the technical solutions of the present application solve the above technical problems by embodiments and with reference to the drawings. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. It should be noted that, in the data transmission method provided by the present application, the execution main body in fig. 2 to fig. 3 is a far-end machine, and the execution main body in fig. 6 to fig. 7 is a near-end machine, where the execution main body in fig. 2 to fig. 7 may also be a data transmission device, where the device may be implemented as part or all of data transmission by software, hardware, or a combination of software and hardware.
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments.
The following describes an embodiment in which the actuator is a side of the near-end device.
In an embodiment, fig. 2 provides a data transmission method, where the embodiment relates to a specific process of transmitting uplink data according to a preset uplink physical frame format after a remote terminal establishes a connection with a near-end, and as shown in fig. 2, the method includes:
s101, the remote terminal sends an access request message to the near-end terminal on an access channel; the access request message is used for requesting to establish connection with the near-end machine and requesting to allocate an uplink data transmission channel.
In this embodiment, the access channel indicates that the connection between the remote terminal and the near-end device is a channel for sending a message, and the access channel may be defined in advance, and this embodiment does not limit what specific access channel is. The access request message sent by the remote machine is used for requesting to establish connection with the near-end machine and requesting the remote machine to allocate an uplink data transmission channel. It is to be understood that the access channel and the upstream data transmission channel mentioned in this step are not one channel, and the upstream data transmission channel represents a channel for transmitting data between the near-end unit and the far-end unit.
S102, the remote terminal receives a response message sent by the near-end terminal; wherein, the response message carries the resource identification of the uplink data transmission channel.
Based on the access request message sent by the remote terminal to the near-end device in the step S101, the remote terminal receives a response message sent by the near-end device, where the response message carries a resource identifier of an uplink data transmission channel, and is used to indicate a resource location of the uplink data transmission channel allocated by the remote terminal. The resource identifier may be formed by numbers, letters, or a combination of the numbers and the letters, which is not limited in this embodiment.
S103, the remote terminal sends uplink data to the near-end terminal on an uplink data transmission channel corresponding to the resource identifier according to a preset uplink physical frame format; wherein, the preset uplink physical frame format indicates that all service data of each remote terminal are transmitted according to the priority of the service QoS.
Based on the response message received in the step S102, the remote terminal sends uplink data to the near-end device on the uplink data transmission channel corresponding to the resource identifier according to the preset uplink physical frame format, where the preset uplink physical frame format indicates the priority of all the QoS of the remote terminals for transmission, which is equivalent to that when the remote terminal sends uplink data on the uplink data transmission channel, the remote terminal needs to sequentially transmit according to the priority of the QoS of each remote terminal, so as to ensure that different levels of services need to be allocated to different users.
According to the data transmission method provided by the embodiment, after receiving the uplink data transmission channel allocated by the near-end machine, the far-end machine transmits uplink data on the uplink data transmission channel according to the preset uplink physical frame format, and transmits the uplink data according to the priority of the QoS (quality of service) of each far-end machine service during transmission, so that the allocation mode is more comprehensive, wireless resources are dynamically and flexibly allocated to corresponding services according to QoS indexes of different service grades of different users, and the utilization rate of the wireless resources is greatly improved.
In the above embodiment, a time when the remote terminal sends the access request message to the near-end device on the access channel is limited, that is, before the remote terminal sends the access request message, it needs to be determined that the access request message satisfies the sending condition before the remote terminal can send the access request message, based on the above embodiment, as shown in fig. 3, in an embodiment, the present application further provides a data sending method, where the method includes:
s201, the remote terminal searches for a broadcast signal sent by the near-end terminal; wherein the broadcast signal includes a resource identification of the access channel.
In this embodiment, the remote terminal needs to constantly search whether the near-end device transmits a broadcast signal carrying an access channel resource identifier, where if the near-end device transmits the broadcast signal, it indicates that the near-end device opens an access channel, and other remote terminals may transmit an access request message through the access channel. In one example, the manner of sending the broadcast signal by the remote terminal includes two manners, one of which is that the near-end machine continuously sends the broadcast signal, and when detecting that all the remote terminals corresponding to the near-end machine have established connection, the near-end machine stops sending the broadcast signal, i.e. the access channel is not opened any more, and the other remote terminals are not allowed to access. In another mode, the near-end unit periodically transmits the broadcast signal, each time the broadcast signal is transmitted, that is, when the access channel is opened, the access channel may be opened for a certain time and then stopped, and if there is a far-end unit that has not been accessed, the near-end unit is accessed after the next time the near-end unit transmits the broadcast signal.
S202, if the far-end machine searches the broadcast signal, the far-end machine sends an access request message to the near-end machine in an access channel; wherein, the access request message comprises the access sequence of the access channel and the remote terminal identification.
Based on the broadcast signal sent by the remote terminal in the step S201, after the remote terminal searches for the broadcast signal sent by the near-end terminal, the remote terminal sends an access request message on an access channel corresponding to the resource identifier carried in the broadcast signal, where the access request message includes an access sequence of the access channel and the remote terminal identifier; wherein, the access sequence can use a preset special pseudo-random sequence; the access sequence of the access channel is the same for all remote units to which a near-end unit corresponds. And the access sequence and the remote machine identification are used for verifying whether the identity of the remote machine is legal by the near-end machine. It will be understood that the legitimate remote units to which a near-end unit can connect are all pre-configured, so that the remote units only respond to access request messages sent by legitimate remote units.
In the data transmission method provided by this embodiment, since the remote terminal sends the access request message to the near-end terminal after searching that the near-end terminal sends the broadcast signal carrying the access channel resource identifier, it is ensured that the access request message sent by the remote terminal is definitely the correct access time, and resource waste of the remote terminal is avoided.
In the above embodiment, the remote terminal requests the near-end to allocate an uplink data transmission channel to the near-end, where the uplink data transmission channel includes two cases, one is a traffic transmission channel, and the other is a training data transmission channel, and based on the above embodiment, in one embodiment, the transmission channel includes a traffic transmission channel; the uplink data sent by the remote machine includes the uplink service data interacted between the remote machine and the near-end machine. In another embodiment, the transmission channel comprises a training data transmission channel; the uplink data sent by the remote terminal includes a training sequence; the training sequence is used for the near-end machine to perform equalization training.
In two cases of the uplink data transmission channel, the corresponding preset uplink physical frame formats are different because the uplink data sent by the remote terminal are different. That is, the preset uplink physical frame format includes two cases, in an embodiment, the preset uplink physical frame format includes a general physical frame format and a training dedicated frame format; the common physical frame format is used for stipulating the resource positions of an access channel and a service transmission channel; the training dedicated frame format is used to specify the resource locations of the access channel and the training data transport channel.
Based on the situation that the two data transmission channels correspond to two preset uplink physical frame formats, in practical application, after the remote terminal accesses the near-end machine, if the near-end machine is allocated with a service transmission channel, the data transmitted by the remote terminal on the service transmission channel is the uplink service data interacted between the remote terminal and the near-end machine, and the uplink service data is transmitted by adopting the common physical frame format.
As shown in fig. 4, optionally, the common physical frame format includes: a random access channel, at least one uplink time slot resource of each remote terminal; the uplink time slot resource comprises a pilot frequency domain, a service transmission channel and a first user guard interval. Optionally, the random access channel is used for transmitting a random access sequence; the random access sequences of all the remote machines corresponding to the near-end machine are the same. Optionally, the random access channel includes a second user guard interval; the second user guard interval is mapped to a distance between the near-end unit and the far-end unit. Optionally, the traffic transmission channel includes pilot symbols with preset lengths configured at preset equal intervals.
The random access channel (PRACH) is a channel used for all remote terminals to initiate a random access request message, and the random access channel is used for transmitting a random access sequence, where the random access sequence uses a special pseudo-random sequence, and the sequence used by all remote terminals corresponding to one near-end terminal is the same, for example, the random access sequence may use a ZC sequence of 139 length. For the resource location of the random access channel, second user guard intervals (i.e. GAPs 2) with different lengths are reserved according to the distance between the remote end machine and the near end machine, for example, GAPs 2 configured with different distances are: GAP2 is 132us, corresponding to a distance of 20 km; GAP2 is 66us, and the corresponding distance is 10 km; GAP2 was 33us, corresponding to a distance of 5 km. Preferably, the GAP2 takes 66us when the distance between the remote and the near-end is 5-10 km.
After all the corresponding remote terminals are accessed, the near-end terminal may delete the PRACH channel and the GAP1 from the common uplink physical frame when the far-end terminal transmits uplink service data according to the common physical frame format to save resources, and reserve all the time slot resources to a Traffic Channel (TCH) channel for uplink service data transmission to improve the resource utilization rate.
The uplink time slot resource comprises a pilot frequency domain, a service transmission channel and a first user guard interval. All priority queues of a remote terminal can be accommodated in a traffic Transmission Channel (TCH) for transmission, and when the remote terminal is scheduled, all QoS queues are transmitted to the TCH according to priority groups. The preamble field (preamble) is used for time synchronization and symbol synchronization, for example, the preamble can take 32 baud and is two identical CHU16 sequences. The first user guard interval (GAP1) represents the timeslot resource interval of remote terminal users, and a certain GAP1 is reserved in a common physical format frame, so that inter-symbol overlapping interference and multipath influence caused by timing errors between remote terminal users with different distances can be avoided, and preferably, the GAP1 in the scheme is 500ns, namely 26 bauds.
Each set of user data in a traffic Transport Channel (TCH) includes a pilot symbol (pilot) with a certain length, except for a preamble segment, a known symbol with the preset length is inserted into the rest segments TCH in a common physical frame structure at equal intervals as the pilot, and the pilot is configured as a cell parameter, for example, the insertion interval is 8/16/32/64baud interval.
Illustratively, the scheme provides a scenario, in a 56M bandwidth mode, a symbol rate of 50.8MBuad is designed according to 1ms per frame, and then a total of 50800 baud is inserted, and then a pilot of 1 baud is inserted every 64 baud: GAP2 is 66 us-3352 baud (slightly greater than 66 us); GAP1 is designed to be 500 ns-26 baud (slightly greater than 500 ns); meanwhile, 1 remote terminal is set to correspond to 8 remote terminals for communication, so that the total overhead is 139+3352+ (32+26) × 8 ═ 3955 baud, the number of the remaining baud is 50800-. Therefore, the air interface data communication transmission of the point-to-multipoint microwave communication system can be flexibly supported, the QoS strategy and the attribute of a supporting user are matched, the overhead of air interface control information interaction is reduced under the condition that normal communication of a point-to-multipoint air interface is ensured, the utilization efficiency of air interface resources is improved, various coverage distances are synchronously supported, and various application scene requirements of networking are met.
Similarly, based on the situation that the two data transmission channels correspond to two preset uplink physical frame formats, in practical application, after the remote terminal accesses the near-end machine, if the near-end machine is allocated with a training data transmission channel, the uplink data transmitted by the remote terminal on the training data is a training sequence, where the training sequence is used for performing equalization training by the near-end machine, and the training dedicated frame format is used for transmitting the uplink service data.
As for the training dedicated frame format, an embodiment of the present application provides a preset format, as shown in fig. 5, the training dedicated frame format is a near-end machine equalization training dedicated frame, and when the training data is sent according to the training dedicated frame format, the training dedicated frame format is sent on a training data transmission channel (PUEQCH), where the training dedicated frame format may be sent only once or periodically, and may specifically be determined according to an actual situation, where a Preamble domain (Preamble) in the training dedicated frame format may be the same as a Preamble used in a common physical frame format. In practical application, the special frame format for training is adopted to transmit training data, which can help the near-end machine to adjust parameters in real time so as to ensure the accuracy of the data transmission process.
The following describes an embodiment in which the actuator is a side of the near-end device. It should be noted that, since the embodiment on the side of the near-end device corresponds to the embodiment on the side of the far-end device, the embodiment on the side of the near-end device for which the contents are partially repeated will not be described again, and specifically, refer to the embodiment on the side of the far-end device.
As shown in fig. 6, an embodiment of the present application provides a data transmission method, including:
s301, the near-end machine receives the access request message sent by the far-end machine.
In this embodiment, the near-end device receives an access request message sent by the far-end device, where the access request message is a message that is sent by the far-end device on an access channel and is used to request to establish a connection with the near-end device and to request allocation of an uplink data transmission channel.
S302, the near-end machine establishes connection with the far-end machine according to the access request message and distributes an uplink data transmission channel for the far-end machine; the remote terminal sends uplink data to the near-end machine according to a preset uplink physical frame format; wherein, the preset up physical frame format indicates that all service data of each remote terminal are transmitted according to the priority of the service quality QoS.
Based on the access request message in step S301, the near-end device establishes a connection with the remote-end device according to the access request message, and allocates an uplink data transmission channel to the remote-end device. The method for allocating the uplink data transmission channel to the remote terminal by the near-end machine is to send a response message carrying the resource identifier of the uplink data transmission channel to the remote terminal, so that the remote terminal knows the resource position of the uplink data transmission channel allocated to the remote terminal. The uplink transmission channel is used for the remote terminal to send uplink data to the near-end machine on the uplink data transmission channel according to a preset uplink physical frame format; wherein, the preset up physical frame format indicates that all service data of each remote terminal are transmitted according to the priority of the service quality QoS.
In the data transmission method provided by this embodiment, after receiving an access request message sent by a remote terminal, a near-end machine establishes a connection with the remote terminal and allocates an uplink data transmission channel to the remote terminal, because the uplink data transmission channel is used for the remote terminal to transmit uplink data according to a preset uplink physical frame format, and the remote terminal transmits the uplink data according to the priority of the service QoS of each remote terminal when transmitting the uplink data, according to QoS indexes of different service classes of different users, an allocation manner is more comprehensive, and radio resources are dynamically and flexibly allocated to corresponding services, thereby greatly improving the utilization rate of the radio resources.
For the process of establishing a connection between the near-end device and the remote-end device, an embodiment of the present application provides a data transmission method, where before the near-end device receives an access request message sent by the remote-end device, the method includes: the near-end machine sends a broadcast signal carrying a resource identifier of an access channel; the broadcast signal is used for the remote terminal to send an access request message in an access channel; the access request message comprises an access sequence of an access channel and a remote terminal identifier; as shown in fig. 7, the step S302 includes:
s401, the near-end machine verifies whether the far-end machine is legal or not according to the access sequence of the access channel and the far-end machine identification.
The remote terminal sends an access request message carrying an access sequence and a remote terminal identifier, and the near-end terminal verifies whether the remote terminal is legal or not according to the access sequence and the remote terminal identifier, wherein the mode of verifying whether the remote terminal is legal or not can be to check whether the access sequence is correct or not and whether the remote terminal identifier is a prestored legal remote terminal identifier or not, and if the access sequence and the remote terminal identifier are both consistent, the remote terminal can be determined to be legal.
S402, if the connection is legal, the near-end machine and the far-end machine are connected.
Based on the verification in the step S401 that the remote terminal that sent the access request message is legitimate, the near-end device establishes a connection with the remote terminal, and allocates an uplink data transmission channel to the remote terminal.
According to the data transmission method provided by the embodiment, the connection with the remote terminal is established only after the near-end machine verifies that the remote terminal is legal, so that the network security is greatly ensured.
In addition, the sending, by the near-end device, the broadcast signal carrying the resource identifier of the access channel may be sent in two ways, and in an embodiment, the sending, by the near-end device, the broadcast signal carrying the resource identifier of the access channel includes a first way: the near-end machine periodically sends a broadcast signal carrying the resource identifier of the access channel; alternatively, the second mode: the near-end machine continuously sends the broadcast signal carrying the resource identifier of the access channel, and stops sending the broadcast signal after all the far-end machines corresponding to the near-end machine are accessed.
Wherein, for the first mode: the PRACH channel and the GAP2 occur periodically, that is, the near-end unit periodically transmits a broadcast signal carrying the access channel resource identifier, where the period may be determined according to an actual situation, and this embodiment does not limit this. When the PRACH channel is not configured (when no broadcast signal is transmitted), the PRACH channel and the GAP2 do not exist, and all time slot resources are allocated to the TCH channels of the respective remote terminals. For example, the period of occurrence of the PRACH channel may be consistent with that of downlink data sent by the near-end device, and when the downlink data is sent, a broadcast signal carrying an access channel resource identifier is sent, that is, the PRACH channel and the GAP1 occur. For example, the period is 128 ms.
For the second mode: under the condition that the near-end machine detects that all the corresponding remote machines are not accessed, the near-end machine continuously sends broadcast signals carrying resource identifiers of access channels, namely a random access channel (PRACH) channel is opened all the time, time slots are reserved for the remote machines to access the near-end machine, if the near-end machine detects that all the corresponding remote machines are accessed successfully, the near-end machine stops sending the broadcast signals, namely the PRACH channel and a second user protection interval (GAP2) are not opened any more, and all time slot resources are reserved for a Traffic Channel (TCH) channel to send uplink data.
In the embodiment, no matter the first mode or the second mode, the open mode for accessing the channel can realize that all time slot resources are reserved for each service transmission channel when the remote terminal is not required to access the near-end machine, so that the resource utilization rate is greatly improved.
It should be noted that, the embodiment related to the preset uplink physical frame format on the side of the near-end device is the same as that on the side of the far-end device, and specific reference may be made to the description on the preset uplink physical frame format on the side of the far-end device, which is not described herein again.
It should be understood that although the various steps in the flow charts of fig. 2-7 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 2-7 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternating with other steps or at least some of the sub-steps or stages of other steps.
In one embodiment, as shown in fig. 8, there is provided a data transmission apparatus including: a first access module 10, a response module 11 and a sending module 12, wherein,
a first access module 10, configured to send an access request message to a near-end device on an access channel; the access request message is used for requesting to establish connection with the near-end machine and requesting to allocate an uplink data transmission channel;
a response module 11, configured to receive, by the remote terminal, a response message sent by the near-end terminal; wherein, the response message carries the resource identification of the uplink data transmission channel;
a sending module 12, configured to send, by the remote terminal, uplink data to the near-end machine on an uplink data transmission channel corresponding to the resource identifier according to a preset uplink physical frame format; wherein, the preset up physical frame format indicates that all service data of each remote terminal are transmitted according to the priority of the service quality QoS.
The implementation principle and technical effect of the data sending apparatus provided by the above embodiment are similar to those of the above method embodiment, and are not described herein again.
In one embodiment, as shown in fig. 9, there is provided a data transmission apparatus, further comprising:
a searching module 13, configured to search for a broadcast signal sent by a near-end device by a far-end device; wherein, the broadcast signal comprises the resource identification of the access channel;
a first access module 10, configured to, if the remote terminal searches for the broadcast signal, send an access request message to the near-end terminal in an access channel; wherein, the access request message comprises the access sequence of the access channel and the remote terminal identification.
The implementation principle and technical effect of the data sending apparatus provided by the above embodiment are similar to those of the above method embodiment, and are not described herein again.
In one embodiment, the transport channel comprises a traffic transport channel; the uplink data sent by the remote machine includes the uplink service data interacted between the remote machine and the near-end machine.
In one embodiment, the transmission channel comprises a training data transmission channel; the uplink data sent by the remote terminal includes a training sequence; the training sequence is used for the near-end machine to perform equalization training.
In one embodiment, the preset uplink physical frame format includes a common physical frame format and a training dedicated frame format; the common physical frame format is used for stipulating the resource positions of an access channel and a service transmission channel; the training dedicated frame format is used to specify the resource locations of the access channel and the training data transport channel.
In one embodiment, the general physical frame format includes: a random access channel, at least one uplink time slot resource of each remote terminal; the uplink time slot resource comprises a pilot frequency domain, a service transmission channel and a first user guard interval.
In one embodiment, the traffic transmission channel includes pilot symbols of a predetermined length arranged at predetermined equal intervals.
In one embodiment, the random access channel is used for transmitting a random access sequence; the random access sequences of all the remote machines corresponding to the near-end machine are the same.
In one embodiment, the random access channel includes a second user guard interval; the second user guard interval is mapped to a distance between the near-end unit and the far-end unit.
The implementation principle and technical effect of the data sending apparatus provided by the above embodiment are similar to those of the above method embodiment, and are not described herein again.
In one embodiment, as shown in fig. 10, there is provided a data transmission apparatus, further comprising: a second access module 14 and a management module 15, wherein,
a second access module 14, configured to receive, by the near-end device, an access request message sent by the far-end device;
the management module 15 is used for establishing connection between the near-end machine and the far-end machine according to the access request message and allocating an uplink data transmission channel for the far-end machine; the remote terminal sends uplink data to the near-end machine according to a preset uplink physical frame format; wherein, the preset up physical frame format indicates that all service data of each remote terminal are transmitted according to the priority of the service quality QoS.
The implementation principle and technical effect of the data sending apparatus provided by the above embodiment are similar to those of the above method embodiment, and are not described herein again.
In one embodiment, there is provided a data transmission apparatus including:
the broadcast module is used for the near-end machine to send a broadcast signal carrying the resource identifier of the access channel; the broadcast signal is used for the remote terminal to send an access request message in an access channel; the access request message comprises an access sequence of an access channel and a remote terminal identifier; then, as shown in fig. 11, the management module 15 includes: an authentication unit 151 and a connection unit 152, wherein
A verification unit 151, configured to verify, by the near-end device, whether the far-end device is legal according to the access sequence of the access channel and the far-end device identifier;
the connection unit 152 is used for establishing connection between the near-end unit and the far-end unit if the connection is legal.
The implementation principle and technical effect of the data sending apparatus provided by the above embodiment are similar to those of the above method embodiment, and are not described herein again.
In an embodiment, the broadcast module is specifically configured to periodically send, by the near-end device, a broadcast signal carrying a resource identifier of an access channel; or, the near-end machine continuously sends the broadcast signal carrying the resource identifier of the access channel, and stops sending the broadcast signal after all the remote machines corresponding to the near-end machine are accessed.
The implementation principle and technical effect of the data sending apparatus provided by the above embodiment are similar to those of the above method embodiment, and are not described herein again.
In one embodiment, the preset uplink physical frame format includes a common physical frame format and a training dedicated frame format; wherein, the common physical frame format is used for stipulating the resource positions of the access channel and the service transmission channel; wherein the training dedicated frame format is used to specify resource locations for the access channel and the training data transport channel.
In one embodiment, the common physical frame format includes a random access channel, at least one uplink timeslot resource of each remote unit; the uplink time slot resource comprises a pilot frequency domain, a service transmission channel and a first user guard interval.
In one embodiment, the traffic transmission channel includes pilot symbols of a predetermined length arranged at predetermined equal intervals.
In one embodiment, the random access channel is used for transmitting a random access sequence; the random access sequences of all the remote machines corresponding to the near-end machine are the same.
In one embodiment, the random access channel includes a second user guard interval; and the second user protection interval has a mapping relation with the distance between the near-end machine and the far-end machine.
The implementation principle and technical effect of the data sending apparatus provided by the above embodiment are similar to those of the above method embodiment, and are not described herein again.
For specific limitations of the data transmission apparatus, reference may be made to the above limitations of the data transmission method, which are not described herein again. The modules in the data transmission device can be wholly or partially implemented by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as shown in fig. 12. The computer device includes a processor, a memory, a network interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a data transmission method. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.
Those skilled in the art will appreciate that the architecture shown in fig. 12 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided, comprising a memory and a processor, the memory having a computer program stored therein, the processor implementing the following steps when executing the computer program:
the remote machine sends an access request message to the near-end machine on an access channel; the access request message is used for requesting to establish connection with a near-end machine and requesting to allocate an uplink data transmission channel;
the remote terminal receives a response message sent by the near-end terminal; wherein, the response message carries the resource identification of the uplink data transmission channel;
the remote terminal sends uplink data to the near-end machine on an uplink data transmission channel corresponding to the resource identifier according to a preset uplink physical frame format; wherein, the preset up physical frame format indicates that all service data of each remote terminal are transmitted according to the priority of the service quality QoS.
Alternatively, the processor implements the following steps when executing the computer program:
the near-end machine receives an access request message sent by the far-end machine;
the near-end machine establishes connection with the far-end machine according to the access request message and distributes an uplink data transmission channel for the far-end machine; the remote terminal sends uplink data to the near-end machine according to a preset uplink physical frame format; wherein, the preset up physical frame format indicates that all service data of each remote terminal are transmitted according to the priority of the service quality QoS.
The implementation principle and technical effect of the computer device provided by the above embodiment are similar to those of the above method embodiment, and are not described herein again.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
the remote machine sends an access request message to the near-end machine on an access channel; the access request message is used for requesting to establish connection with a near-end machine and requesting to allocate an uplink data transmission channel;
the remote terminal receives a response message sent by the near-end terminal; wherein, the response message carries the resource identification of the uplink data transmission channel;
the remote terminal sends uplink data to the near-end machine on an uplink data transmission channel corresponding to the resource identifier according to a preset uplink physical frame format; wherein, the preset up physical frame format indicates that all service data of each remote terminal are transmitted according to the priority of the service quality QoS.
Alternatively, the computer program when executed by the processor implements the steps of:
the near-end machine receives an access request message sent by the far-end machine;
the near-end machine establishes connection with the far-end machine according to the access request message and distributes an uplink data transmission channel for the far-end machine; the remote terminal sends uplink data to the near-end machine according to a preset uplink physical frame format; wherein, the preset up physical frame format indicates that all service data of each remote terminal are transmitted according to the priority of the service quality QoS.
The implementation principle and technical effect of the computer-readable storage medium provided by the above embodiments are similar to those of the above method embodiments, and are not described herein again.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.