CN109428686B - Data transmission method, system, terminal, base station and computer readable storage medium - Google Patents
Data transmission method, system, terminal, base station and computer readable storage medium Download PDFInfo
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- CN109428686B CN109428686B CN201710478280.0A CN201710478280A CN109428686B CN 109428686 B CN109428686 B CN 109428686B CN 201710478280 A CN201710478280 A CN 201710478280A CN 109428686 B CN109428686 B CN 109428686B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
Abstract
The invention discloses a data transmission method, a system, a terminal, a base station and a computer readable storage medium, which relate to the technical field of wireless communication, wherein the method comprises the following steps: responding to a connection reconfiguration message which is sent by a base station and carries an enabling configuration cell, and configuring parameters for transmitting data in a first transmission mode by a terminal, wherein the first transmission mode is a Transmission Time Interval (TTI) binding mode or a non-TTI binding mode; the terminal sends a connection reconfiguration completion message to the base station after the configuration is completed; a terminal sends a first uplink resource request message to a base station; and responding to a first uplink authorization message returned by the base station, and transmitting data to the base station by the terminal in the first transmission mode, wherein the first uplink authorization message carries a mark representing the first transmission mode. The invention can improve the speed of changing the data transmission mode.
Description
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a data transmission method, system, terminal, base station, and computer-readable storage medium.
Background
In the 3rd Generation Partnership Project (3 GPP) Long Term Evolution (LTE) application, when a cell edge or a channel is severely damaged, a terminal of a Voice over LTE (VoLTE) user has a limited Transmission power, and thus cannot satisfy a Block Error Rate (BLER) requirement for data Transmission within one Transmission Time Interval (TTI).
In view of the above problems, 3GPP proposes a concept of TTI Bundling (Transmission Time Interval Bundling, TTI-B), which may also be referred to as subframe Bundling. The transmission of data in TTI bundling means that one data Block (TB) is repeatedly transmitted over a plurality of consecutive TTI resources, and a receiving end merges data over the plurality of TTI resources. Compared with a non-TTI bundling mode, the transmission quality can be improved by transmitting data in the TTI bundling mode, the decoding success rate of the data is improved, the uplink coverage range is improved, and the experience of a VoLTE user is improved.
The 3GPP has proposed the concept of TTI-B, but has not given a method how to activate and deactivate the TTI bundling function. When the activation and deactivation of the TTI bundling function is implemented, the device manufacturer generally adopts intra-cell handover and random access processes, thereby implementing synchronization between the terminal and the base station.
For example, the terminal currently transmits data to the base station in a non-TTI-bundled manner, and the base station currently configures parameters for transmitting data in a non-TTI-bundled manner. If the TTI bundling function needs to be activated, the terminal needs to leave the base station first, and then the terminal and the base station respectively configure parameters for transmitting data in a TTI bundling mode. After configuring the parameters for transmitting data in the TTI bundling mode, the terminal accesses the base station randomly, so that the terminal can transmit data to the base station in the TTI bundling mode.
However, the inventors of the present invention found that: the above-described method has at least the following problems:
1. the terminal needs to leave the base station first and then randomly accesses the base station, and the terminal performs intra-cell switching, so that the method has complex flow, large time delay and low switching speed between different data transmission modes;
2. if the base station has accessed a plurality of terminals at this time, the terminals may fail to access during random access, thereby affecting normal transmission of data, causing a dropped connection of a VoLTE user, and seriously affecting user experience of the VoLTE user.
Disclosure of Invention
One object of the present invention is: the speed of changing the data transmission mode is improved.
According to an aspect of the present invention, there is provided a data transmission method, including: responding to a connection reconfiguration message which is sent by a base station and carries an enabling configuration cell, and configuring parameters for transmitting data in a first transmission mode by a terminal, wherein the first transmission mode is a Transmission Time Interval (TTI) binding mode or a non-TTI binding mode; the terminal sends a connection reconfiguration completion message to the base station after the configuration is completed; a terminal sends a first uplink resource request message to a base station; and responding to a first uplink authorization message returned by the base station, and transmitting data to the base station by the terminal in the first transmission mode, wherein the first uplink authorization message carries a mark representing the first transmission mode.
In one embodiment, before sending the connection reconfiguration complete message to the base station, the terminal further includes: the terminal sends a second uplink resource request message to the base station; responding to a second uplink authorization message returned by the base station, and transmitting data to the base station by the terminal in a second transmission mode, wherein the second uplink authorization message carries a mark representing the second transmission mode; wherein one of the first transmission mode and the second transmission mode is a TTI bundling mode, and the other one is a non-TTI bundling mode.
In one embodiment, the terminal transmitting data to the base station in the first transmission mode comprises: under the condition that a first hybrid automatic repeat request (HARQ) process has old data, the terminal buffers the old data in a buffer, wherein the data in the first HARQ process is transmitted to a base station in the second transmission mode; and the terminal pushes the old data in the buffer into a second HARQ process, and transmits the old data to the base station in the first transmission mode.
In one embodiment, the method further comprises: and after the terminal buffers the old data in the buffer, the old data in the first HARQ process is cleared.
In one embodiment, the transmitting, by the terminal, data to the base station in the first transmission mode further includes: and the terminal pushes new data different from the old data into the second HARQ process and transmits the new data to the base station in the first transmission mode.
According to another aspect of the present application, there is provided a data transmission method including: a base station sends a connection reconfiguration message carrying an enabling configuration cell to a terminal so that the terminal configures parameters for transmitting data in a first transmission mode, wherein the first transmission mode is a Transmission Time Interval (TTI) binding mode or a non-TTI binding mode; the base station receives a connection reconfiguration completion message sent by the terminal after the configuration is completed; and responding to a first uplink resource request message sent by the terminal, the base station returns a first uplink authorization message to the terminal so that the terminal transmits data to the base station in the first transmission mode, wherein the first uplink authorization message carries a mark representing the first transmission mode.
In one embodiment, before the base station receives the connection reconfiguration complete message sent by the terminal, the method further includes: responding to a second uplink resource request message sent by the terminal, the base station returns a second uplink authorization message to the terminal so that the terminal transmits data to the base station in a second transmission mode, wherein the second uplink authorization message carries a mark representing the second transmission mode; wherein one of the first transmission mode and the second transmission mode is a TTI bundling mode, and the other one is a non-TTI bundling mode.
According to still another aspect of the present application, there is provided a terminal including: a parameter configuration unit, configured to configure a parameter for transmitting data in a first transmission mode in response to a connection reconfiguration message carrying an enable configuration cell sent by a base station, where the first transmission mode is a Transmission Time Interval (TTI) bundling mode or a non-TTI bundling mode; a message sending unit, configured to send a connection reconfiguration complete message to the base station after configuration is completed; a resource request unit, configured to send a first uplink resource request message to a base station; and the data transmission unit is used for responding to a first uplink authorization message returned by the base station and transmitting data to the base station in the first transmission mode, wherein the first uplink authorization message carries a mark representing the first transmission mode.
In one embodiment, the resource requesting unit is further configured to send a second uplink resource request message to the base station before sending the connection reconfiguration complete message to the base station; the data transmission unit is also used for responding to a second uplink authorization message returned by the base station and transmitting data to the base station in a second transmission mode, wherein the second uplink authorization message carries a mark representing the second transmission mode; wherein one of the first transmission mode and the second transmission mode is a TTI bundling mode, and the other one is a non-TTI bundling mode.
In one embodiment, the data transmission unit is configured to buffer old data in a buffer if the first hybrid automatic repeat request HARQ process has the old data, where the data in the first HARQ process is transmitted to the base station in the second transmission mode; and pushing the old data in the buffer into a second HARQ process, and transmitting the old data to a base station in the first transmission mode.
In one embodiment, the terminal further includes: a data clearing unit, configured to clear the old data in the first HARQ process after the old data is buffered in a buffer.
In one embodiment, the data transmission unit is further configured to push new data different from the old data into the second HARQ process, and transmit the new data to the base station in the first transmission mode.
According to still another aspect of the present application, there is provided a base station including: a reconfiguration initiating unit, configured to send a connection reconfiguration message carrying an enable configuration cell to a terminal, so that the terminal configures parameters for transmitting data in a first transmission mode, where the first transmission mode is a Transmission Time Interval (TTI) bundling mode or a non-TTI bundling mode; a message receiving unit, configured to receive a connection reconfiguration complete message sent by the terminal after configuration is completed; and the uplink authorization unit is used for responding to a first uplink resource request message sent by the terminal and returning a first uplink authorization message to the terminal so that the terminal can transmit data to the base station in the first transmission mode, wherein the first uplink authorization message carries a mark representing the first transmission mode.
In an embodiment, the uplink grant unit is further configured to, before receiving a connection reconfiguration complete message sent by the terminal, return a second uplink grant message to the terminal in response to a second uplink resource request message sent by the terminal, so that the terminal transmits data to the base station in a second transmission mode, where the second uplink grant message carries a flag indicating the second transmission mode; wherein one of the first transmission mode and the second transmission mode is a TTI bundling mode, and the other one is a non-TTI bundling mode.
According to another aspect of the present application, there is provided a data transmission system, comprising: the terminal according to any of the above embodiments; and a base station as in any of the above embodiments.
According to still another aspect of the present application, there is provided a data transmission system including: a memory; and a processor coupled to the memory, the processor configured to perform the method of any of the above embodiments based on instructions stored in the memory.
According to a further aspect of the present application, there is provided a computer-readable storage medium having stored thereon computer program instructions, which when executed by a processor, implement the method according to any of the embodiments described above.
In this embodiment, the connection reconfiguration message only needs to carry the enable configuration cell and does not need to carry the handover command cell, so that after receiving the connection reconfiguration message, the terminal only needs to configure the relevant parameters of the first transmission mode to be handed over according to the enable configuration cell, and the terminal can determine that data can be transmitted to the base station in the first transmission mode according to the flag indicating the first transmission mode carried in the first uplink grant message returned by the base station. Compared with the prior art, the method and the device can quickly realize the change of the data transmission mode without complex intra-cell switching and random access processes, improve the speed of changing the data transmission mode, and avoid the problem of data transmission interruption caused by random access failure.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow diagram of a data transmission method according to one embodiment of the invention;
FIG. 2 is a flow chart illustrating a data transmission method according to another embodiment of the present invention;
FIG. 3 is a flow chart illustrating a data transmission method according to another embodiment of the present invention;
fig. 4 is a schematic structural diagram of a terminal according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a base station according to an embodiment of the present invention;
FIG. 6 is a schematic block diagram of a data transmission system according to one embodiment of the present invention;
fig. 7 is a schematic configuration diagram of a data transmission system according to another embodiment of the present invention;
fig. 8 is a schematic structural diagram of a data transmission system according to still another embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 is a flow chart of a data transmission method according to an embodiment of the invention.
In step 102, in response to a connection reconfiguration message carrying an enable configuration cell sent by the base station, the terminal configures parameters for transmitting data in the first transmission mode. The first transmission mode may be a TTI bundling mode or may be a non-TTI bundling mode.
In one embodiment, the connection reconfiguration message may be an RRC (Radio Resource Control) connection reconfiguration message. The type of the enable configuration cell determines the type of the first transmission mode. For example, if the field ttiBundling included in the configuration-enabled cell is TRUE, it indicates that the terminal needs to configure the parameter for transmitting data in the TTI bundling manner; if the field ttiBundling included in the configuration-enabled cell is FALSE, it indicates that the terminal needs to configure the parameter for transmitting data in the non-TTI-bundled manner.
In practical application, the base station may determine the type of the enabling configuration cell according to the transmission power headroom reported by the terminal or the uplink channel quality. For example, when the transmission power margin is not limited to limited or the uplink channel quality is generally poor, the base station sends a connection reconfiguration message to the terminal, where an enable configuration information element carried in the connection reconfiguration message may include a TTI bundling field indicating that the terminal needs to switch to the TTI bundling mode to transmit data. For another example, when the transmission power headroom is from limited to unlimited or the uplink channel quality is poor to general, the base station also sends a connection reconfiguration message to the terminal, where the connection reconfiguration message carries an enable configuration information element that may include a field of ttiBundling, which indicates that the terminal needs to switch to the non-TTI bundling manner to transmit data.
Illustratively, the terminal configures parameters for transmitting data in TTI bundling/non-TTI bundling, for example, may configure a process, a transmission mechanism, and the like for transmitting data.
In step 104, the terminal sends a connection reconfiguration complete message to the base station after the configuration is completed. For example, the terminal does not activate the TTI bundling scheme immediately after the parameter configuration for data transmission in the TTI bundling scheme is completed, but transmits an RRC Connection Reconfiguration Complete message (RRC Connection Reconfiguration Complete) to the base station to notify the base station that the parameter configuration of the TTI bundling scheme has been completed.
In an embodiment, the base station may be provided with a determiner, and after receiving the connection reconfiguration complete message, the determiner in the base station may set the TTI bundling state from an inactive state to an active state, indicating that the base station also enters a mode for transmitting data in the TTI bundling manner.
In step 106, the terminal sends a first uplink resource Request message (Scheduling Request) to the base station.
In step 108, in response to the first Uplink Grant message (Grant Uplink) returned by the base station, the terminal transmits data to the base station in the first transmission mode, where the Uplink Grant message carries a flag indicating the first transmission mode.
In an embodiment, the terminal may be provided with a determiner, where the determiner in the terminal sets a TTI bundling state according to a flag in a first uplink grant message returned by the base station, and further determines a data transmission mode entered by the terminal according to the TTI bundling state.
For example, the flags may be: the TTI-B _ Flag is ON, which indicates that the base station has configured parameters for transmitting data in a TTI bundling manner, and the terminal may set the TTI bundling state in the decision device in the terminal to ACTIVE (TTI-B _ Status _ UE) after receiving the Flag, so that the terminal may transmit data to the base station in the TTI bundling manner; for another example, the flags may be: the TTI-B _ Flag is OFF, which indicates that the base station has configured parameters for transmitting data in a non-TTI bundling manner, and after receiving the Flag, the terminal may set the TTI bundling state in the decision device in the terminal to INACTIVE (TTI-B _ Status _ UE is INACTIVE), so that the terminal may transmit data to the base station in a non-TTI bundling manner.
In this embodiment, the connection reconfiguration message only needs to carry the enable configuration cell and does not need to carry the handover command cell, so that after receiving the connection reconfiguration message, the terminal only needs to configure the relevant parameters of the first transmission mode to be handed over according to the enable configuration cell, and the terminal can determine that data can be transmitted to the base station in the first transmission mode according to the flag indicating the first transmission mode carried in the first uplink grant message returned by the base station. Compared with the prior art, the method and the device can quickly realize the change of the data transmission mode without complex intra-cell switching and random access processes, improve the speed of changing the data transmission mode, and avoid the problem of data transmission interruption caused by random access failure.
By using the method of the embodiment of the invention, the terminal can quickly enter the TTI bundling mode under the condition that the cell edge or the channel is seriously damaged, thereby quickly improving the voice quality of a terminal user; and the terminal can rapidly enter a non-TTI bundling mode under the condition of leaving the cell edge or recovering the channel, thereby avoiding excessive bundling transmission of data.
Fig. 2 is a flowchart illustrating a data transmission method according to another embodiment of the present invention.
In step 202, in response to a connection reconfiguration message carrying an enable configuration cell sent by the base station, the terminal configures parameters for transmitting data in the first transmission mode.
In step 204, the terminal sends a second uplink resource request message to the base station.
In step 206, in response to the second uplink grant message returned by the base station, the terminal transmits data to the base station in the second transmission mode. Here, the second uplink grant message carries a flag indicating the second transmission mode. One of the first transmission mode and the second transmission mode is a TTI bundling mode, and the other one is a non-TTI bundling mode. For example, the first transmission mode is a TTI bundling mode, and the second transmission mode is a non-TTI bundling mode; or, the first transmission mode is a non-TTI bundling mode, and the second transmission mode is a TTI bundling mode.
In step 208, the terminal transmits a connection reconfiguration complete message to the base station after the configuration is completed.
In step 210, the terminal sends a first uplink resource request message to the base station.
In step 212, in response to the first uplink grant message returned by the base station, the terminal transmits data to the base station in the first transmission mode, where the first uplink grant message carries a flag indicating the first transmission mode.
The above steps 202, 208 and 212 can be referred to the description of the steps 102 and 108 shown in fig. 1.
In this embodiment, the terminal transmits the data to the base station in the second transmission mode before transmitting the connection reconfiguration complete message to the base station, and transmits the data to the base station in the first transmission mode after transmitting the connection reconfiguration complete message to the base station, so that smooth transition from the second transmission mode to the first transmission mode is achieved, and continuity of data transmission is ensured.
In one implementation, the terminal transmits data to the base station in the second transmission mode through a first HARQ (hybrid automatic repeat request process), and transmits data to the base station in the first transmission mode through a second HARQ process. If the data transmitted by the terminal to the base station in the second/first transmission mode is already acknowledged by the base station, for example, the base station returns an ACK message to the terminal, the terminal will clear the data acknowledged by the base station in the first/second HARQ process; if the data transmitted by the terminal to the base station in the second/first transmission mode is not acknowledged by the base station, for example, the base station returns a NACK message to the terminal, and the NACK message may include a sequence number of a data packet that is not received correctly, the terminal may retain the data that is not acknowledged by the base station in the first/second HARQ process.
In the embodiment shown in fig. 2, during the process of transmitting data to the base station in the second transmission manner, some data may not be received by the base station, some data may not be ready to be transmitted to the base station, and these data are all retained in the first HARQ process, and these data retained in the first HARQ process are collectively referred to as old data herein.
In one implementation, before the terminal transmits data to the base station in the first transmission mode, the terminal may determine whether the first HARQ process has the old data, and in the case that the first HARQ process has the old data, the terminal may buffer the old data in a buffer. After that, the terminal may push the old data in the buffer into the second HARQ process, so as to transmit the old data to the base station in the first transmission mode, so as to avoid the loss of the old data. Preferably, after the terminal buffers the old data in the buffer, the old data in the first HARQ process may be cleared, so as to avoid that the old data in the first HARQ process is repeatedly sent when the terminal switches back to the second transmission mode. In addition, it should be understood that, in the case where there is no old data in the first HARQ process, the above-described operation in which the terminal buffers the old data in the buffer need not be performed.
In another implementation, the terminal may push new data different from the old data into the second HARQ process, and transmit the new data to the base station in the first transmission manner.
Fig. 3 is a flowchart illustrating a data transmission method according to another embodiment of the invention.
In step 302, the base station sends a connection reconfiguration message carrying an enable configuration cell to the terminal, so that the terminal configures parameters for transmitting data in the first transmission mode. Here, the first transmission scheme may be a TTI bundling scheme or a non-TTI bundling scheme. The type of the enable configuration cell determines the type of the first transmission mode. For example, if the field ttiBundling included in the configuration-enabled cell is TRUE, it indicates that the first transmission mode is the TTI bundling mode; if the field ttiBundling included in the configuration-enabled cell is FALSE, it indicates that the first transmission mode is the non-TTI bundling mode.
In step 304, the base station receives a connection reconfiguration complete message sent by the terminal after the configuration is completed. In one embodiment, the base station may be provided with a decision device, and after receiving the connection reconfiguration complete message, the decision device in the base station may set the TTI bundling state from an inactive state to an active state, indicating that the base station enters a mode of transmitting data in the TTI bundling manner; or, the state of TTI bundling is set from the active state to the inactive state, which indicates that the base station enters a mode of transmitting data in a non-TTI bundling manner.
In step 306, in response to the first uplink resource request message sent by the terminal, the base station returns a first uplink grant message to the terminal, so that the terminal transmits data to the base station in the first transmission mode. Here, the first uplink grant message carries a flag indicating the first transmission mode.
The base station may set a flag in the first uplink grant message according to a state of TTI bundling in the determiner. If the TTI bundling state is an active state, the flag carried by the first uplink authorization message indicates that the base station has configured the parameter for transmitting data in the TTI bundling manner, and the terminal transmits the data to the base station in the TTI bundling manner after confirming that the base station has configured the parameter for transmitting data in the TTI bundling manner. If the TTI bundling state is the inactive state, the flag carried by the first uplink authorization message indicates that the base station has configured the parameter for transmitting data in the non-TTI bundling manner, and the terminal transmits the data to the base station in the non-TTI bundling manner after confirming that the base station has configured the parameter for transmitting data in the non-TTI bundling manner.
In this embodiment, the connection reconfiguration message only needs to carry the enabling configuration cell and does not need to carry the switching command cell, so that the terminal only needs to configure the relevant parameters of the first transmission mode to be switched according to the enabling configuration cell after receiving the connection reconfiguration message. The first uplink authorization message returned by the base station to the terminal carries a mark representing the first transmission mode, so that the terminal can determine that the data can be transmitted to the base station in the first transmission mode according to the mark. Compared with the prior art, the method and the device can quickly realize the change of the data transmission mode without complex intra-cell switching and random access processes, improve the speed of changing the data transmission mode, and avoid the problem of data transmission interruption caused by random access failure.
In an embodiment, before the step 304, the embodiment shown in fig. 3 may further include: and responding to a second uplink resource request message sent by the terminal, and returning a second uplink authorization message to the terminal by the base station so that the terminal transmits data to the base station in a second transmission mode. Here, the second uplink grant message carries a flag indicating the second transmission mode. One of the first transmission mode and the second transmission mode is a TTI bundling mode, and the other one is a non-TTI bundling mode.
In this embodiment, a second uplink grant message returned to the terminal before the base station receives a connection reconfiguration complete message sent by the terminal carries a flag indicating a second transmission mode, so that the terminal transmits data to the base station in the second transmission mode; after the base station receives the connection reconfiguration completion message sent by the terminal, the first uplink authorization message returned to the terminal carries a mark representing the first transmission mode, so that the terminal transmits data to the base station in the first transmission mode. The embodiment realizes smooth transition from the second transmission mode to the first transmission mode, and ensures the continuity of data transmission.
In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts in the embodiments are referred to each other. For the terminal and base station embodiments, since they basically correspond to the method embodiments, the description is relatively simple, and for the relevant points, refer to the partial description of the method embodiments.
Fig. 4 is a schematic structural diagram of a terminal according to an embodiment of the present invention. The terminal includes a parameter configuration unit 401, a message transmission unit 402, a resource request unit 403, and a data transmission unit 404. The parameter configuration unit 401 is configured to configure a parameter for transmitting data in a first transmission mode in response to a connection reconfiguration message carrying an enable configuration cell sent by a base station, where the first transmission mode is a TTI bundling mode or a non-TTI bundling mode. The message sending unit 402 is configured to send a connection reconfiguration complete message to the base station after the configuration is completed. The resource requesting unit 403 is configured to send a first uplink resource request message to the base station. The data transmission unit 404 is configured to transmit data to the base station in a first transmission manner in response to a first uplink grant message returned by the base station, where the first uplink grant message carries a flag indicating the first transmission manner.
In one embodiment, the resource requesting unit 403 is further configured to send a second uplink resource request message to the base station before sending the connection reconfiguration complete message to the base station. Correspondingly, the data transmission unit 404 is further configured to transmit data to the base station in a second transmission mode in response to a second uplink grant message returned by the base station, where the second uplink grant message carries a flag indicating the second transmission mode. In this embodiment, one of the first transmission scheme and the second transmission scheme is a TTI bundling scheme, and the other is a non-TTI bundling scheme.
In one embodiment, the data transmission unit 404 is configured to buffer old data in a buffer if the first HARQ process has the old data, where the data in the first HARQ process is transmitted to the base station in the second transmission mode; and pushing the old data in the buffer into a second HARQ process, and transmitting the old data to the base station in a first transmission mode. In another embodiment, the terminal may further include a data clearing unit configured to clear the old data in the first HARQ process after the old data is buffered in the buffer. In another embodiment, the data transmission unit 404 is further configured to push new data different from the old data into the second HARQ process, and transmit the new data to the base station in the first transmission manner.
Fig. 5 is a schematic structural diagram of a base station according to an embodiment of the present invention. The base station comprises a reconfiguration initiating unit 501, a message receiving unit 502 and an uplink authorization unit 503. The reconfiguration initiating unit 501 is configured to send a connection reconfiguration message carrying an enable configuration cell to the terminal, so that the terminal configures parameters for transmitting data in a first transmission mode, where the first transmission mode is a TTI bundling mode or a non-TTI bundling mode. The message receiving unit 502 is configured to receive a connection reconfiguration complete message sent by the terminal after configuration is completed. The uplink grant unit 503 is configured to return a first uplink grant message to the terminal in response to the first uplink resource request message sent by the terminal, so that the terminal transmits data to the base station in the first transmission mode, where the first uplink grant message carries a flag indicating the first transmission mode.
In an embodiment, the uplink grant unit 503 is further configured to, before receiving the connection reconfiguration complete message sent by the terminal, return a second uplink grant message to the terminal in response to a second uplink resource request message sent by the terminal, so that the terminal transmits data to the base station in a second transmission mode, where the second uplink grant message carries a flag indicating the second transmission mode. In this embodiment, one of the first transmission scheme and the second transmission scheme is a TTI bundling scheme, and the other is a non-TTI bundling scheme.
Fig. 6 is a schematic structural diagram of a data transmission system according to an embodiment of the present invention. The system includes the terminal 601 provided in any of the above embodiments and the base station 602 provided in any of the above embodiments.
Fig. 7 is a schematic structural diagram of a data transmission system according to another embodiment of the present invention. The system includes a memory 701 and a processor 702. The memory 701 may be a magnetic disk, flash memory, or any other non-volatile storage medium. The memory is used to store instructions in the embodiments corresponding to fig. 1, 2, 3 or 4. Coupled to memory 701 is a processor 702, which may be implemented as one or more integrated circuits, such as a microprocessor or microcontroller. The processor 702 is configured to execute the instructions stored in the memory 701, so that the speed of changing the data transmission mode can be effectively increased, and the problem of data transmission interruption caused by random access failure is also avoided.
Fig. 8 is a schematic structural diagram of a data transmission system according to still another embodiment of the present invention. The system 800 includes a memory 801 and a processor 802. The processor 802 is coupled to the memory 801 by a BUS (BUS) 803. The system 800 may also be connected to an external storage device 805 through a storage interface 804 to call external data, and may also be connected to a network or an external computer system (not shown) through a network interface 806.
In this embodiment, the data instruction is stored in the memory, and the processor processes the instruction, so that the speed of changing the data transmission mode can be effectively increased, and the problem of data transmission interruption caused by random access failure is also avoided.
The present invention also provides a computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the method in the embodiments corresponding to fig. 1, 2, 3 or 4. As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
In addition to the advantages mentioned in the above embodiments, the embodiments of the present invention also have the following advantages:
1. the present invention is suitable for not only Frequency Division Duplex (FDD) systems but also Time Division Duplex (TDD) systems.
2. The method flow provided by the invention does not relate to the modification of the retransmission mechanism, is simple to realize, is compatible with the existing setting of the existing network and is also compatible with the traditional method.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Thus far, the present invention has been described in detail. Some details well known in the art have not been described in order to avoid obscuring the concepts of the present invention. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
The method and apparatus of the present invention may be implemented in a number of ways. For example, the methods and apparatus of the present invention may be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above-described order for the steps of the method is for illustrative purposes only, and the steps of the method of the present invention are not limited to the order specifically described above unless specifically indicated otherwise. Furthermore, in some embodiments, the present invention may also be embodied as a program recorded in a recording medium, the program including machine-readable instructions for implementing a method according to the present invention. Thus, the present invention also covers a recording medium storing a program for executing the method according to the present invention.
Although some specific embodiments of the present invention have been described in detail by way of illustration, it should be understood by those skilled in the art that the above illustration is only for the purpose of illustration and is not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (17)
1. A method of data transmission, comprising:
responding to a connection reconfiguration message which is sent by a base station and carries an enabling configuration cell, and configuring parameters for transmitting data in a first transmission mode by a terminal;
the terminal sends a connection reconfiguration completion message to the base station after the configuration is completed;
a terminal sends a first uplink resource request message to a base station; and
responding to a first uplink authorization message returned by the base station, and transmitting data to the base station in the first transmission mode by the terminal, wherein the first uplink authorization message carries a mark representing the first transmission mode;
and the terminal transmits data to the base station in a second transmission mode before transmitting the connection reconfiguration completion message to the base station, wherein one of the first transmission mode and the second transmission mode is a Transmission Time Interval (TTI) bundling mode, and the other one is a non-TTI bundling mode.
2. The method of claim 1, wherein before sending the connection reconfiguration complete message to the base station, the terminal further comprises:
the terminal sends a second uplink resource request message to the base station; and
and responding to a second uplink authorization message returned by the base station, and transmitting data to the base station by the terminal in the second transmission mode, wherein the second uplink authorization message carries a mark representing the second transmission mode.
3. The method of claim 2, wherein the terminal transmitting data to the base station in the first transmission mode comprises:
under the condition that a first hybrid automatic repeat request (HARQ) process has old data, the terminal buffers the old data in a buffer, wherein the data in the first HARQ process is transmitted to a base station in the second transmission mode; and
and the terminal pushes the old data in the buffer into a second HARQ process and transmits the old data to the base station in the first transmission mode.
4. The method of claim 3, further comprising:
and after the terminal buffers the old data in the buffer, the old data in the first HARQ process is cleared.
5. The method of claim 3, wherein the terminal transmitting data to the base station in the first transmission mode further comprises:
and the terminal pushes new data different from the old data into the second HARQ process and transmits the new data to the base station in the first transmission mode.
6. A method of data transmission, comprising:
a base station sends a connection reconfiguration message carrying an enabling configuration cell to a terminal so that the terminal configures parameters for transmitting data in a first transmission mode, wherein the terminal transmits the data to the base station in a second transmission mode before sending a connection reconfiguration completion message to the base station, one of the first transmission mode and the second transmission mode is a Transmission Time Interval (TTI) bundling mode, and the other one is a non-TTI bundling mode;
the base station receives a connection reconfiguration completion message sent by the terminal after the configuration is completed; and
and responding to a first uplink resource request message sent by the terminal, the base station returns a first uplink authorization message to the terminal so that the terminal transmits data to the base station in the first transmission mode, wherein the first uplink authorization message carries a mark representing the first transmission mode.
7. The method of claim 6, wherein before the base station receives the connection reconfiguration complete message sent by the terminal, the method further comprises:
and responding to a second uplink resource request message sent by the terminal, and returning a second uplink authorization message to the terminal by the base station so that the terminal transmits data to the base station in the second transmission mode, wherein the second uplink authorization message carries a mark representing the second transmission mode.
8. A terminal, comprising:
a parameter configuration unit, configured to configure a parameter for transmitting data in a first transmission mode in response to a connection reconfiguration message carrying an enable configuration cell sent by a base station;
a message sending unit, configured to send a connection reconfiguration complete message to the base station after configuration is completed;
a resource request unit, configured to send a first uplink resource request message to a base station; and
a data transmission unit, configured to respond to a first uplink grant message returned by a base station, and transmit data to the base station in the first transmission mode, where the first uplink grant message carries a flag indicating the first transmission mode;
and the terminal transmits data to the base station in a second transmission mode before transmitting the connection reconfiguration completion message to the base station, wherein one of the first transmission mode and the second transmission mode is a Transmission Time Interval (TTI) bundling mode, and the other one is a non-TTI bundling mode.
9. The terminal of claim 8,
the resource request unit is further configured to send a second uplink resource request message to the base station before sending the connection reconfiguration complete message to the base station; and
the data transmission unit is further configured to transmit data to the base station in the second transmission mode in response to a second uplink grant message returned by the base station, where the second uplink grant message carries a flag indicating the second transmission mode.
10. The terminal of claim 9,
the data transmission unit is used for buffering old data in a buffer under the condition that the first hybrid automatic repeat request HARQ process has the old data, wherein the data in the first HARQ process is transmitted to a base station in the second transmission mode; and pushing the old data in the buffer into a second HARQ process, and transmitting the old data to a base station in the first transmission mode.
11. The terminal of claim 10, further comprising:
a data clearing unit, configured to clear the old data in the first HARQ process after the old data is buffered in a buffer.
12. The terminal of claim 10,
the data transmission unit is further configured to push new data different from the old data into the second HARQ process, and transmit the new data to the base station in the first transmission manner.
13. A base station, comprising:
a reconfiguration initiating unit, configured to send a connection reconfiguration message carrying an enable configuration cell to a terminal, so that the terminal configures parameters for transmitting data in a first transmission mode, where the terminal transmits the data to a base station in a second transmission mode before sending a connection reconfiguration complete message to the base station, and one of the first transmission mode and the second transmission mode is a Transmission Time Interval (TTI) bundling mode and the other is a non-TTI bundling mode;
a message receiving unit, configured to receive a connection reconfiguration complete message sent by the terminal after configuration is completed;
and the uplink authorization unit is used for responding to a first uplink resource request message sent by the terminal and returning a first uplink authorization message to the terminal so that the terminal can transmit data to the base station in the first transmission mode, wherein the first uplink authorization message carries a mark representing the first transmission mode.
14. The base station of claim 13,
the uplink authorization unit is further configured to, before receiving a connection reconfiguration complete message sent by the terminal, respond to a second uplink resource request message sent by the terminal, and return a second uplink authorization message to the terminal, so that the terminal transmits data to the base station in the second transmission mode, where the second uplink authorization message carries a flag indicating the second transmission mode.
15. A data transmission system, comprising: a terminal according to any one of claims 8-12; and a base station according to claim 13 or 14.
16. A data transmission system, comprising:
a memory; and
a processor coupled to the memory, the processor configured to perform the method of any of claims 1-7 based on instructions stored in the memory.
17. A computer-readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the method of any one of claims 1-7.
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