CN109429324B - Method, system and base station for realizing TTI-B activation and deactivation - Google Patents
Method, system and base station for realizing TTI-B activation and deactivation Download PDFInfo
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- CN109429324B CN109429324B CN201710520769.XA CN201710520769A CN109429324B CN 109429324 B CN109429324 B CN 109429324B CN 201710520769 A CN201710520769 A CN 201710520769A CN 109429324 B CN109429324 B CN 109429324B
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Abstract
The invention discloses a method, a system and a base station for realizing TTI-B activation and deactivation, and relates to the field of LTE. The method comprises the following steps: a base station sends a Radio Resource Control (RRC) connection reconfiguration message to a terminal, wherein the RRC connection reconfiguration message carries a Transmission Time Interval (TTI) -B state conversion cell so that the terminal can configure state parameters according to the TTI-B state conversion cell; responding to the uplink data sent by the terminal, and receiving the uplink data by the base station in a double-decoding mode; and when the base station successfully decodes the uplink data in a mode corresponding to the state parameter, the base station receives the uplink data subsequently sent by the terminal in a single decoding mode corresponding to the state parameter. The invention can realize the synchronization of the uplink transmission mode between the base station and the terminal. In addition, the voice quality of the VoLTE user can be rapidly improved, and the defects that the traditional method is complex to realize, low in conversion speed, and prone to switching failure and the like are overcome.
Description
Technical Field
The present invention relates to the field of LTE (Long Term Evolution, 3GPP Long Term Evolution), and in particular, to a method, a system, and a base station for activating and deactivating TTI-B (Transmission Time Interval Bundling).
Background
A Voice over Long Term Evolution (3 GPP) user is seriously damaged at a cell edge or a channel, and under a coverage limitation condition, a terminal cannot meet a Block Error rate (BLER Rat) requirement for data transmission within one TTI due to limitation of transmission power of the terminal. Therefore, the TTI-B concept is proposed in VoLTE, a plurality of uplink continuous TTIs are bound and distributed to the same terminal, the success rate of data decoding can be improved, the uplink coverage range of VoLTE is improved, and therefore the user experience of VoLTE is improved.
When activating and deactivating the TTI-B function based on an RRC (Radio Resource Control) connection reconfiguration message, there is a problem of terminal/base station synchronization, and manufacturers propose a conventional method for activating and deactivating TTI-B based on intra-cell handover for the synchronization problem. The core idea is to introduce intra-cell handover and random access procedures to avoid uncertainty during activation and deactivation of TTI-B and ensure synchronization between the terminal and the base station.
However, the TTI-B method based on intra-cell handover activation and deactivation has the following problems: firstly, the activation and deactivation time delay is increased, the intra-cell switching method has switching and random access processes, resources are consumed, the activation and deactivation processes are complex, the activation and deactivation process time delay is large, the intra-cell switching is generally 50 ms-60 ms, the activation speed is slow, and the VoLTE experience of edge users is influenced. Second, signaling overhead is increased, a random access procedure is increased based on an intra-cell handover method, and signaling overhead of MSG1, MSG2, MSG3 and MSG4 is increased in the random access procedure, thereby causing excessive consumption of signaling resources of a base station. Third, the dropped call rate of the VoLTE is increased, and due to the fact that the situation of switching failure or random access failure occurs in the switching and random access processes, the dropped call problem of the VoLTE telephone can be caused under the situation, so that the dropped call rate of the VoLTE is increased, and the user experience of the VoLTE is seriously influenced. Fourthly, interference is caused by random access failure, the terminal can continuously raise the transmitting power due to the random access failure, and the interference to other terminals can be caused by the increase of the transmitting power.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method, a system and a base station for realizing TTI-B activation and deactivation, wherein the base station can realize the synchronization of an uplink transmission mode between the base station and a terminal.
According to an aspect of the present invention, a method for implementing TTI-B activation and deactivation is provided, including: a base station sends a Radio Resource Control (RRC) connection reconfiguration message to a terminal, wherein the RRC connection reconfiguration message carries a Transmission Time Interval (TTI) -B state conversion cell so that the terminal can configure state parameters according to the TTI-B state conversion cell; responding to the uplink data sent by the terminal, and receiving the uplink data by the base station in a double-decoding mode; and when the base station successfully decodes the uplink data in a mode corresponding to the state parameter, the base station receives the uplink data subsequently sent by the terminal in a single decoding mode corresponding to the state parameter.
Further, the TTI-B state transition information element includes a TTI-B enabled information element or a TTI-B disabled information element.
Further, the receiving, by the base station, the uplink data in the dual decoding manner includes: the base station receives uplink data in a normal transmission mode and a TTI-B transmission mode.
Further, when the TTI-B status transition cell is a TTI-B enabled cell, if the base station successfully decodes the uplink data in the TTI-B manner, the base station subsequently receives the uplink data sent by the terminal in the TTI-B decoding manner; or when the TTI-B state conversion cell is a TTI-B non-enabled cell, if the base station successfully decodes the uplink data in a normal mode, the base station subsequently receives the uplink data sent by the terminal in a normal decoding mode.
Further, the terminal clears the first HARQ process according to the TTI-B state transition information element and prepares a second HARQ process.
According to another aspect of the present invention, there is also provided a base station, including: a connection reconfiguration message sending unit, configured to send a radio resource control RRC connection reconfiguration message to the terminal, where the RRC connection reconfiguration message carries a TTI-B state transition cell, so that the terminal configures a state parameter according to the TTI-B state transition cell; a first uplink data receiving unit, configured to receive uplink data in a dual decoding manner in response to the uplink data sent by the terminal; and a second uplink data receiving unit, configured to receive, when the uplink data is successfully decoded in a manner corresponding to the status parameter, uplink data subsequently transmitted by the terminal in a single decoding manner corresponding to the status parameter.
Further, the TTI-B state transition information element includes a TTI-B enabled information element or a TTI-B disabled information element.
Further, the first uplink data receiving unit is used for receiving uplink data in a normal transmission mode and a TTI-B transmission mode.
Further, the second uplink data receiving unit is configured to, when the TTI-B status transition cell is a TTI-B enabling cell, receive, in a subsequent TTI-B decoding manner, uplink data transmitted by the terminal if the base station successfully decodes the uplink data in the TTI-B manner; or the second uplink data receiving unit is used for receiving the uplink data sent by the terminal in a normal decoding mode subsequently if the base station successfully decodes the uplink data in the normal mode when the TTI-B state conversion cell is the TTI-B non-enabling cell.
According to another aspect of the present invention, a system for implementing TTI-B activation and deactivation is also provided, which includes a terminal and the base station.
According to another aspect of the present invention, a system for implementing TTI-B activation and deactivation is also provided, including: a memory; and a processor coupled to the memory, the processor configured to perform the method as described above based on instructions stored in the memory.
According to another aspect of the present invention, a computer-readable storage medium is also proposed, on which computer program instructions are stored, which instructions, when executed by a processor, implement the steps of the above-described method.
Compared with the prior art, the base station receives the uplink data sent by the terminal in a double-decoding mode after sending the RRC connection reconfiguration message to the terminal, and receives the uplink data subsequently sent by the terminal in a single-decoding mode corresponding to the state parameter when the uplink data is successfully decoded in a mode corresponding to the state parameter, so that the synchronization of the uplink transmission mode between the base station and the terminal can be realized. In addition, the TTI-B or non-TTI-B function can be enabled to take effect quickly under the condition that the cell edge or the channel is seriously damaged, the voice quality of the VoLTE user is rapidly improved, and the defects that the traditional method is complex to realize, low in conversion speed, prone to switching failure and the like are overcome.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
The invention will be more clearly understood from the following detailed description, taken with reference to the accompanying drawings, in which:
fig. 1 is a flowchart illustrating an embodiment of a method for implementing TTI-B activation and deactivation according to the present invention.
Fig. 2 is a flowchart illustrating an embodiment of a method for implementing TTI-B activation according to the present invention.
FIG. 3 is a flowchart illustrating an embodiment of a method for implementing TTI-B deactivation according to the present invention.
Fig. 4 is a schematic structural diagram of a base station according to an embodiment of the present invention.
FIG. 5 is a structural diagram of an embodiment of a system for implementing TTI-B deactivation.
Fig. 6 is a schematic structural diagram of another embodiment of the system for implementing TTI-B deactivation according to the present invention.
Fig. 7 is a schematic structural diagram of a system for implementing TTI-B deactivation according to still another embodiment of the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: 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.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
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.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.
Fig. 1 is a flowchart illustrating an embodiment of a TTI-B activation and deactivation method according to the present invention.
In step 110, the base station sends an RRC connection reconfiguration message to the terminal, where the RRC connection reconfiguration message carries only TTI-B state transition information elements, such as TTI-B enabled information elements or TTI-B disabled information elements, but does not carry mobility control info (cell switching) information elements. The RRC connection reconfiguration message includes a field ttiBundling, which indicates that the terminal needs to switch to the TTI-B mode to transmit data; ttiBundling, which indicates that the terminal needs to switch to a non-TTI-B (Normal) mode to transmit data. The base station can determine whether to activate or deactivate the TTI-B function for the VoLTE user according to the transmission power margin reported by the terminal or the uplink channel quality.
In step 120, in response to the uplink data transmitted by the terminal, the base station receives the uplink data in a dual decoding manner. During the Normal and TTI-B transition, because the base station can not know the exact moment when the terminal state parameter (TTI-B or Normal) configuration is completed, a decoding mode is added in the base station, that is, between the base station sending RRC connection reconfiguration message to the terminal and receiving RRC reconfiguration complete message from the terminal, the base station adopts double decoding mode (TTI-B and Normal mode simultaneously decoding) to receive the data sent by the terminal, always one decoding mode receives correctly, and the correct data reception during the Normal and TTI-B transition is ensured.
After receiving the RRC connection reconfiguration message, the terminal sets the state parameters, does not prepare for intra-cell handover, and clears the first HARQ (Hybrid Automatic Repeat Request) process according to the TTI-B state transition cell to prepare a second HARQ process. For example, if the TTI-B state transition information element is a TTI-B enabled information element, the non-TTI-B HARQ process is cleared and a TTI-B HARQ process is prepared. If the TTI-B state transition information element is a TTI-B non-enabled information element, the terminal clears the TTI-B HARQ process and prepares a non-TTI-B HARQ process.
In step 130, when the base station successfully decodes the uplink data in a manner corresponding to the status parameter, the base station receives the uplink data subsequently transmitted by the terminal in a single decoding manner corresponding to the status parameter. For example, when the TTI-B status transition cell is a TTI-B enabling cell, if the base station successfully decodes the uplink data in the TTI-B manner, it indicates that the terminal has performed uplink transmission in the TTI-B manner, and at this time, both the base station and the terminal have entered the TTI-B status, and the base station subsequently receives the uplink data sent by the terminal in the TTI-B decoding manner. When the TTI-B state conversion cell is a TTI-B non-enabled cell, if the base station successfully decodes the uplink data in a normal mode, it indicates that the terminal has performed uplink transmission in the normal mode, and at this time, the base station and the terminal have both entered the normal state, and the base station subsequently receives the uplink data sent by the terminal in the normal decoding mode.
In this embodiment, after sending the RRC connection reconfiguration message to the terminal, the base station receives uplink data sent by the terminal in a dual decoding manner, and when the uplink data is successfully decoded in a manner corresponding to the state parameter, receives uplink data subsequently sent by the terminal in a single decoding manner corresponding to the state parameter, so as to achieve synchronization of an uplink transmission manner between the base station and the terminal. In addition, the TTI-B or non-TTI-B function can be enabled to take effect quickly under the condition that the cell edge or the channel is seriously damaged, the voice quality of the VoLTE user is rapidly improved, and the defects that the traditional method is complex to realize, low in conversion speed, prone to switching failure and the like are overcome.
Fig. 2 is a flowchart illustrating an embodiment of a method for implementing TTI-B activation according to the present invention. The base station side may add a decision device for determining when to receive the data transmitted by the terminal in the dual decoding manner and when to receive the data transmitted by the terminal in the TTI-B single decoding manner.
In the non-TTI-B state, steps 210 to 240 are performed.
In step 210, the terminal sends an SR (Scheduling Request) Request to the base station.
In step 220, the base station returns an Uplink scheduling Grant (UL Grant) response to the terminal.
In step 230, the terminal transmits uplink data to the base station in a normal (non-TTI-B) manner.
In step 240, the base station returns an ACK (acknowledgement) or NACK (non-acknowledgement) response to the terminal.
And when the transmission power margin reported by the VoLTE user is not limited to be limited or when the uplink channel quality of the VoLTE user is generally poor, executing the steps 250-290.
In step 250, the base station sends an RRC connection reconfiguration message to the terminal, where the RRC connection reconfiguration message carries a TTI-B enable cell, i.e., ttiBundling TRUR, but does not carry a MobilityControlInfo cell. At this time, the determiner determines to receive uplink data transmitted by the terminal in a dual decoding scheme.
In step 260, the terminal transmits an SR request to the base station.
In step 270, the base station returns an uplink scheduling Grant UL Grant response to the terminal.
In step 280, the base station receives uplink data transmitted from the terminal in a dual decoding scheme. Before the terminal configures and activates TTI-B, the terminal sends uplink data in a normal mode, and because the base station receives data in a double decoding mode, the data is decoded in the normal mode and is totally decoded in the TTI-B mode.
In step 290, the base station returns an ACK or NACK response to the terminal.
In the TTI-B state, that is, after the terminal configures and activates TTI-B, the terminal has a data packet to transmit, and the data packet is transmitted in the TTI-B mode, because the base station receives data in dual decoding, the data packet is totally decoded in the normal mode, and is decoded in the TTI-B mode, once the data packet is decoded in the TTI-B mode, the determiner determines to receive the data transmitted by the terminal in the TTI-B single decoding manner, that is, the base station stops the dual decoding reception mode, and immediately enters the TTI-B single decoding reception mode, which indicates that the base station has successfully entered the TTI-B mode, and the specific implementation steps are shown in 2100 and 2140.
In step 2100, the terminal transmits an RRC configuration complete message to the base station in TTI-B.
In step 2110, the terminal transmits an SR request to the base station.
In step 2120, the base station returns a UL Grant response to the terminal.
In step 2130, the terminal transmits uplink data to the base station in the TTI-B manner.
In step 2140, the base station returns an acknowledgement or non-acknowledgement response to the terminal.
In the embodiment, before the terminal configures and activates the TTI-B function, the terminal sends uplink data in a normal mode, and as the base station receives data in a double decoding mode, the data is decoded in the normal mode and is totally decoded in the TTI-B mode; after the terminal configures and activates the TTI-B function, the terminal has data packets to be sent and can send in a TTI-B mode, because the base station adopts double decoding for receiving, the data packets are totally decoded in a normal mode and are decoded in the TTI-B mode, once the data packets are decoded in the TTI-B mode, the base station stops the double decoding receiving mode and immediately enters a TTI-B single decoding receiving mode, therefore, intra-cell switching and random access processes are not needed, the TTI-B function can be quickly activated, and the synchronization of an uplink transmission mode between the base station and the terminal can be realized. The method overcomes the problems of complex signaling, long TTI-B activation time and the like of the conventional method for switching in the cell, saves system resources, reduces TTI-B switching delay, increases the TTI-B switching success rate, reduces the defects of VoLTE call drop caused by random access failure, interference caused by continuous lifting of transmitting power of the terminal and the like, and finally improves the VoLTE user experience.
FIG. 3 is a flowchart illustrating an embodiment of a method for implementing TTI-B deactivation according to the present invention. The base station side may add a decision device for determining when to receive the data transmitted by the terminal in the dual decoding mode and when to receive the data transmitted by the terminal in the normal single decoding mode.
In the TTI-B state, steps 310 to 340 are performed.
In step 310, the terminal transmits an SR request to the base station.
In step 320, the base station returns an UL Grant response to the terminal.
In step 330, the terminal transmits uplink data to the base station in a TTI-B manner.
In step 340, the base station returns an acknowledgement or non-acknowledgement response to the terminal.
And when the transmission power margin reported by the VoLTE user is not limited or the uplink channel quality of the VoLTE user is poor to be general, executing the steps 350-390.
In step 350, the base station sends an RRC connection reconfiguration message to the terminal, where the RRC connection reconfiguration message carries the TTI-B non-enabled cell, that is, TTI-B is FALSE, but does not carry a MobilityControlInfo cell. At this time, the determiner determines to receive data transmitted from the terminal in a double decoding manner.
In step 360, the terminal transmits an SR request to the base station.
In step 370, the base station returns an UL Grant response to the terminal.
In step 380, the base station receives uplink data transmitted by the terminal in a dual decoding manner. Before the terminal configures and deactivates the TTI-B function, the terminal sends uplink data in a TTI-B mode, and the base station receives the data in a double decoding mode, but the data is decoded in the TTI-B mode, and the data is decoded in a normal mode.
In step 390, the base station returns an ACK or NACK response to the terminal.
In the non-TTI-B state, that is, after the terminal configures and deactivates the TTI-B function, the terminal has a data packet to send, and the data packet is sent in the normal mode, because the base station receives data in dual decoding, the data packet is totally decoded in the TTI-B mode, and is decoded in the normal mode, once the data packet is decoded in the normal mode, the determiner determines to receive the data sent by the terminal in the normal single decoding manner, that is, the base station stops the dual decoding receiving mode, and immediately enters the normal single decoding receiving mode, which indicates that the base station has successfully entered the normal mode, and the specific execution step is shown as 3100-.
In step 3100, the terminal transmits an RRC configuration complete message to the base station in a normal manner.
In step 3110, the terminal transmits an SR request to the base station.
In step 3120, the base station returns an UL Grant response to the terminal.
In step 3130, the terminal transmits uplink data to the base station in a normal manner.
In step 3140, the base station returns an acknowledgement or non-acknowledgement response to the terminal.
In this embodiment, before the terminal configures and deactivates the TTI-B function, the terminal transmits uplink data in the TTI-B mode, and since the base station receives data in the dual decoding manner, the data is undone in the TTI-B mode, and is always error-resolved in the normal mode; after the terminal configures and deactivates the TTI-B function, the terminal has a data packet to send and can send in a normal mode, because the base station adopts double decoding reception, the total error is decoded in the TTI-B mode, the pair is decoded in the normal mode, once the pair is decoded in the normal mode, the base station stops the double decoding reception mode and immediately enters the normal single decoding reception mode, thus, the intra-cell switching is not needed, and the base station and the terminal synchronously enter a TTI-B deactivation state. The method overcomes the problems of complex signaling, long TTI-B deactivation time and the like of the conventional method for switching in the cell, saves system resources, reduces TTI-B switching delay, increases the TTI-B switching success rate, reduces the defects of VoLTE call drop caused by random access failure, interference caused by continuous lifting of transmitting power of the terminal and the like, and finally improves the VoLTE user experience.
In another embodiment of the invention, when the transmission power margin reported by the VoLTE user is not limited to be limited or when the quality of the uplink channel of the VoLTE user is generally poor, the terminal reads the RRC connection reconfiguration message sent by the base station, and if the RRC connection reconfiguration message includes TTI-B enable and has a trigger switching flag, that is, includes a MobilityControlInfo cell, the terminal is compatible with the conventional TTI-B activation method; if the RRC connection reconfiguration message includes TTI-B enabled and does not trigger a handover flag, i.e. does not have a MobilityControlInfo information element, the method described in fig. 2 is performed. When the transmitting power margin reported by a VoLTE user is not limited or when the quality of an uplink channel of the VoLTE user is poor to be general, a terminal reads an RRC connection reconfiguration message sent by a base station, and if the RRC connection reconfiguration message comprises a TTI-B incapability and a trigger switching mark, namely a MobilityControlInfo cell, the RRC connection reconfiguration message is compatible with a traditional TTI-B deactivation method; if the RRC connection reconfiguration message includes TTI-B not enabled and no handover trigger flag, i.e. no MobilityControlInfo information element, the method described in fig. 3 is performed.
The invention does not relate to retransmission mechanism modification, is simple to realize, is compatible with the existing setting of the existing network and is also compatible with the traditional method, in addition, intra-cell switching and random access processes are not needed, the complex process is simplified, the resource consumption is reduced, TTI-B activation and deactivation are quickly effective, the conversion power is high, the voice quality of edge users is improved as soon as possible, and the VoLTE user experience of the edge users is improved.
Fig. 4 is a schematic structural diagram of a base station according to an embodiment of the present invention. The base station includes a connection reconfiguration message transmission unit 410, a first uplink data reception unit 420, and a second uplink data reception unit 430, wherein the first uplink data reception unit 420 and the second uplink data reception unit 430 may be integrated in a determiner of the base station.
The connection reconfiguration message sending unit 410 is configured to send an RRC connection reconfiguration message to the terminal, where the RRC connection reconfiguration message carries only a TTI-B state transition information element, such as a TTI-B enabled information element or a TTI-B disabled information element, but does not carry a MobilityControlInfo information element. The RRC connection reconfiguration message includes a field ttiBundling, which indicates that the terminal needs to switch to the TTI-B mode to transmit data; and ttiBundling, which indicates that the terminal needs to switch to a non-TTI-B mode to transmit data. The base station can determine whether to activate or deactivate the TTI-B function for the VoLTE user according to the transmission power margin reported by the terminal or the uplink channel quality.
The first uplink data receiving unit 420 is configured to respond to the uplink data sent by the terminal, and the base station receives the uplink data in a double decoding manner. During the Normal and TTI-B transition, because the base station can not know the exact moment when the terminal state parameter (TTI-B or Normal) configuration is completed, a decoding mode is added in the base station, that is, between the base station sending RRC connection reconfiguration message to the terminal and receiving RRC reconfiguration complete message from the terminal, the base station adopts double decoding mode (TTI-B and Normal mode simultaneously decoding) to receive the data sent by the terminal, always one decoding mode receives correctly, and the correct data reception during the Normal and TTI-B transition is ensured.
After receiving the RRC connection reconfiguration message, the terminal sets state parameters, does not make preparation for intra-cell handover, clears the first HARQ process according to the TTI-B state transition information element and prepares a second HARQ process. For example, if the TTI-B state transition information element is a TTI-B enabled information element, the non-TTI-B HARQ process is cleared and a TTI-B HARQ process is prepared. If the TTI-B state transition information element is a TTI-B non-enabled information element, the terminal clears the TTI-B HARQ process and prepares a non-TTI-B HARQ process.
The second uplink data receiving unit 430 is configured to, when the base station successfully decodes the uplink data in a manner corresponding to the status parameter, receive, by the base station, uplink data subsequently transmitted by the terminal in a single decoding manner corresponding to the status parameter. For example, when the TTI-B status transition cell is a TTI-B enabling cell, if the base station successfully decodes the uplink data in the TTI-B manner, it indicates that the terminal has performed uplink transmission in the TTI-B manner, and at this time, both the base station and the terminal have entered the TTI-B status, and the base station subsequently receives the uplink data sent by the terminal in the TTI-B decoding manner. When the TTI-B state conversion cell is a TTI-B non-enabled cell, if the base station successfully decodes the uplink data in a normal mode, it indicates that the terminal has performed uplink transmission in the normal mode, and at this time, the base station and the terminal have both entered the normal state, and the base station subsequently receives the uplink data sent by the terminal in the normal decoding mode.
In this embodiment, after sending the RRC connection reconfiguration message to the terminal, the base station receives uplink data sent by the terminal in a dual decoding manner, and when successfully decoding the uplink data in a manner corresponding to the state parameter, receives uplink data subsequently sent by the terminal in a single decoding manner corresponding to the state parameter. The method can realize the synchronization of the uplink transmission mode between the base station and the terminal, in addition, the TTI-B or non-TTI-B function can be enabled to take effect quickly under the condition that the cell edge or the channel is seriously damaged, the voice quality of the VoLTE user is rapidly improved, and the defects that the traditional method is complex to realize, the conversion speed is low, the switching failure can occur and the like are overcome.
FIG. 5 is a structural diagram of an embodiment of a system for implementing TTI-B deactivation. The system comprises a base station 510 and a terminal 520, wherein the base station 510 and the terminal 520 have been described in detail in the above embodiments. The base station 510 only carries TTI _ B activation or FALSE _ c _ t _ B deactivation in the RRC connection reconfiguration message, where TRUE indicates TTI _ B activation and FALSE indicates TTI _ B deactivation, and does not carry mobility control info information. In addition, a decision device may be added in the base station, after the base station sends an RRC reconfiguration message to the terminal, the decision device determines to start a dual decoding mode (TTI-B and Normal mode decode simultaneously) to receive data sent by the terminal, because the base station cannot know the exact moment when TTI-B (or Normal) of the terminal is valid, during the transition between Normal and TTI-B, the base station receives data sent by the terminal in the dual decoding mode, so as to ensure that data is correctly received during the transition between Normal and TTI-B, and until TTI-B (or Normal) decoding succeeds in dual decoding reception, TTI-B (or Normal) single decoding reception is changed, so that the base station formally enters a TTI-B (or Normal) reception state.
The invention does not need intra-cell switching and random access processes, simplifies the complex process and reduces the resource consumption; in addition, the scheme can enable the TTI-B activation and deactivation to be effective quickly, the power is high, the voice quality of the edge user is improved as soon as possible, and the VoLTE user experience of the edge user is improved; the efficiency and the resource utilization rate of the VoLTE system can be improved; in addition, the scheme has no influence on the terminal, only needs software upgrade at the base station side, is simple to realize and has good backward compatibility and deployment feasibility.
Fig. 6 is a schematic structural diagram of another embodiment of the system for implementing TTI-B deactivation according to the present invention. The system includes a memory 610 and a processor 620. Wherein:
the memory 610 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. 1-3.
In one embodiment, as also shown in FIG. 7, the system 700 includes a memory 710 and a processor 720. Processor 720 is coupled to memory 710 by BUS 730. The system 700 may be further coupled to an external storage device 750 via a storage interface 740 for facilitating external data transfer, and may be further coupled to a network or another computer system (not shown) via a network interface 760, which will not be described in detail herein.
In the embodiment, the data instruction is stored in the memory, and the instruction is processed by the processor, so that the TTI-B can take effect quickly when the cell edge or the channel is seriously damaged, the voice quality of the VoLTE user is improved quickly, and the defects that the traditional method is complex to realize, the switching speed is low, the switching failure can occur and the like are overcome.
In another embodiment, a computer-readable storage medium has stored thereon computer program instructions which, when executed by a processor, implement the steps of the method in the corresponding embodiment of fig. 1-3. 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.
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 (10)
1. A method for activating and deactivating Transmission Time Interval (TTI) -B (transmission time interval) binding is characterized by comprising the following steps:
a base station sends a Radio Resource Control (RRC) connection reconfiguration message to a terminal, wherein the RRC connection reconfiguration message carries a Transmission Time Interval (TTI) -B state conversion cell so that the terminal can configure state parameters according to the TTI-B state conversion cell;
between the base station sending RRC connection reconfiguration information to the terminal and receiving RRC reconfiguration complete information from the terminal, the base station decodes uplink data in a non-TTI-B mode and a TTI-B mode at the same time;
and when the base station successfully decodes the uplink data in a mode corresponding to the state parameter, the base station receives the uplink data subsequently sent by the terminal in a single decoding mode corresponding to the state parameter.
2. The method of claim 1,
the TTI-B state transition information element comprises a TTI-B enabled information element or a TTI-B disabled information element.
3. The method of claim 2,
when the TTI-B state transition cell is a TTI-B enabling cell, if the base station successfully decodes the uplink data in a TTI-B mode, the base station subsequently receives the uplink data sent by the terminal in a TTI-B decoding mode;
or
And when the TTI-B state conversion cell is a TTI-B non-enabled cell, if the base station successfully decodes the uplink data in a non-TTI-B mode, the base station subsequently receives the uplink data sent by the terminal in a non-TTI-B decoding mode.
4. The method according to any one of claims 1 to 3,
and the terminal clears the first hybrid automatic repeat request HARQ process according to the TTI-B state transition cell and prepares a second HARQ process.
5. A base station, comprising:
a connection reconfiguration message sending unit, configured to send a radio resource control RRC connection reconfiguration message to a terminal, where the RRC connection reconfiguration message carries a TTI-B state transition cell, so that the terminal configures a state parameter according to the TTI-B state transition cell;
a first uplink data receiving unit, configured to decode uplink data in a non-TTI-B manner and a TTI-B manner simultaneously between the base station sending an RRC connection reconfiguration message to the terminal and receiving an RRC reconfiguration complete message from the terminal;
and a second uplink data receiving unit, configured to receive uplink data subsequently sent by the terminal in a single decoding manner corresponding to the status parameter when the uplink data is successfully decoded in a manner corresponding to the status parameter.
6. The base station of claim 5,
the TTI-B state transition information element comprises a TTI-B enabled information element or a TTI-B disabled information element.
7. The base station of claim 5,
the second uplink data receiving unit is configured to, when the TTI-B status transition cell is a TTI-B enabling cell, receive, in a subsequent TTI-B decoding manner, uplink data sent by the terminal if the base station successfully decodes the uplink data in a TTI-B manner;
or
And the second uplink data receiving unit is configured to, when the TTI-B state transition cell is a TTI-B non-enabled cell, receive uplink data sent by the terminal in a non-TTI-B decoding manner subsequently if the base station successfully decodes the uplink data in a non-TTI-B manner.
8. A system for implementing TTI-B activation and deactivation, comprising a terminal and a base station according to any of claims 5 to 7.
9. A system for implementing TTI-B activation and deactivation, comprising:
a memory; and
a processor coupled to the memory, the processor configured to perform the method of any of claims 1-4 based on instructions stored in the memory.
10. A computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the method of any one of claims 1 to 4.
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