CN113068268A - Terminal scheduling method, base station and terminal - Google Patents
Terminal scheduling method, base station and terminal Download PDFInfo
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- CN113068268A CN113068268A CN202010002207.8A CN202010002207A CN113068268A CN 113068268 A CN113068268 A CN 113068268A CN 202010002207 A CN202010002207 A CN 202010002207A CN 113068268 A CN113068268 A CN 113068268A
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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
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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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
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
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Abstract
The embodiment of the invention provides a terminal scheduling method, a base station and a terminal, wherein the method comprises the following steps: after a Radio Resource Control (RRC) establishment message is sent to a terminal, uplink scheduling is carried out on the terminal through a Downlink Control Information (DCI) 0-0 format, and downlink scheduling is carried out on the terminal through a DCI1-0 format; after an RRC reconfiguration message is sent to the terminal, the DCI format for carrying out uplink scheduling on the terminal is switched from DCI0-0 to DCI 0-1; and when receiving an uplink data packet or a scheduling request SR sent by the terminal, switching the DCI format for downlink scheduling of the terminal from DCI1-0 to DCI 1-1. The embodiment of the invention realizes the timely switching of the DCI format.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a terminal scheduling method, a base station, and a terminal.
Background
In a New Radio (NR) system of 5G, in order to support data transmission of an uplink transmission channel and a downlink transmission channel, a set of control signaling related to the New Radio (NR) system needs to be designed. Wherein, the uplink and DownLink Control signaling includes DownLink scheduling assignment and uplink scheduling authorization, i.e. DownLink Control Information (DCI) of uplink and DownLink; the downlink DCI is used to inform the terminal how to normally receive, demodulate, and decode downlink transmission data on which air interface resources, and the uplink DCI is used to inform the terminal of uplink allocated resources and a transmission format that should be used for uplink data transmission. In addition, in NR, two formats are defined for uplink and downlink DCI, namely downlink scheduling assignment DCI1-0 and DCI1-1, and uplink scheduling assignment DCI0-0 and DCI 0-1. Wherein, DCI1-1 and DCI0-1 support all NR characteristics, the carried bit information is more than DCI1-0 and DCI0-0, and the information size carried by DCI1-1 and DCI0-1 is not fixed, some information bit fields may not appear according to the NR characteristics of the system configuration, while the information size carried by DCI1-0 and DCI0-0 is fixed, and only limited NR characteristics can be supported. Therefore, before the terminal capability and the reconfiguration parameter are obtained to take effect, namely the terminal initial access process, the DCI1-0 and the DCI0-0 are adopted for scheduling authorization, and after the terminal access is successful and the reconfiguration parameter takes effect, the DCI1-1 and the DCI0-1 are adopted for scheduling authorization, so that numerous characteristics of NR, such as BWP switching/codebook-based non-codebook beamforming and the like, are realized. At this time, the DCI format switching problem is involved, that is, when DCI format-0 is adopted, when DCI format-1 is modified, and how DCI formats of the base station and the terminal are synchronously validated, if DCI format switching between the base station and the terminal is not synchronously validated, formats on both sides of the base station and the terminal are inconsistent, unexpected scheduling occurs, and then a terminal with a demodulation error cannot complete access.
At present, when Radio Resource Control (RRC) parameters are reconfigured during DCI format switching, a base station issues an RRC reconfiguration signaling and then schedules a terminal by using DCI0-0 and DCI1-0, because the format sizes of the DCI0-0 and the DCI1-0 are fixed, the terminal can recognize the Control signaling, and the scheduling is ensured not to be interrupted. When the base station receives the reconfiguration finishing signaling sent by the terminal, the base station considers that the terminal has received the reconfiguration signaling and takes effect, the terminal can identify the changed DCI0-1 and DCI1-1, and the base station schedules the terminal by adopting the switched DCI0-1 and DCI 1-1.
However, in the above scheduling method, because the time consumed by the base station from sending the reconfiguration signaling to receiving the reconfiguration completion signaling is too long, the base station does not control the signaling format switching in time, and only a small data volume can be scheduled by using the DCI0-0 and the DCI1-0 in this period, which may affect the user data throughput; in addition, the terminal can only use one of the DCI0-0/1-0 or the DCI0-1/1-1 to perform the DCI search in one set of search spaces, if the terminal is required to support both the DCI0-0/1-0 and the DCI0-1/1-1, at least two sets of search spaces are configured for the terminal, the two search spaces respectively support the search of the DCI0-0/1-0 and the DCI0-1/1-1, and the terminal performs the blind DCI detection operation on the two search spaces, so that the power consumption of the terminal is increased.
Disclosure of Invention
The embodiment of the invention provides a terminal scheduling method, a base station and a terminal, which aim to solve the problem that only a small data volume can be scheduled during switching due to untimely DCI format switching.
The embodiment of the invention provides a terminal scheduling method, which is applied to a base station and comprises the following steps:
after a Radio Resource Control (RRC) establishment message is sent to a terminal, uplink scheduling is carried out on the terminal through a Downlink Control Information (DCI) 0-0 format, and downlink scheduling is carried out on the terminal through a DCI1-0 format;
after an RRC reconfiguration message is sent to the terminal, the DCI format for carrying out uplink scheduling on the terminal is switched from DCI0-0 to DCI 0-1;
and when receiving an uplink data packet or a scheduling request SR sent by the terminal, switching the DCI format for downlink scheduling of the terminal from DCI1-0 to DCI 1-1.
The embodiment of the invention provides a terminal scheduling method, which is applied to a terminal and comprises the following steps:
after receiving a Radio Resource Control (RRC) establishment message sent by a base station, performing uplink scheduling according to a Downlink Control Information (DCI) 0-0 format, and performing downlink scheduling according to a DCI1-0 format;
after receiving the RRC reconfiguration message sent by the base station, switching the DCI format for uplink scheduling from DCI0-0 to DCI 0-1;
and sending an uplink data packet or a scheduling request SR to the base station so that the base station switches the DCI format for downlink scheduling of the terminal from DCI1-0 to DCI 1-1.
The embodiment of the invention provides a terminal scheduling device, which is applied to a base station and comprises the following components:
the scheduling module is used for carrying out uplink scheduling on the terminal through a downlink control information DCI0-0 format and carrying out downlink scheduling on the terminal through a DCI1-0 format after a Radio Resource Control (RRC) establishment message is sent to the terminal;
the first switching module is used for switching the DCI format for performing uplink scheduling on the terminal from DCI0-0 to DCI0-1 after the RRC reconfiguration message is sent to the terminal;
and the second switching module is used for switching the DCI format for performing downlink scheduling on the terminal from DCI1-0 to DCI1-1 when receiving an uplink data packet or a scheduling request SR sent by the terminal.
The embodiment of the invention provides a terminal scheduling device, which is applied to a terminal and comprises the following components:
the scheduling module is used for performing uplink scheduling according to a downlink control information DCI0-0 format and performing downlink scheduling according to a DCI1-0 format after receiving a Radio Resource Control (RRC) establishment message sent by a base station;
the first switching module is used for switching the DCI format for uplink scheduling from DCI0-0 to DCI0-1 after receiving the RRC reconfiguration message sent by the base station;
and the second switching module is used for sending an uplink data packet or a scheduling request SR to the base station so that the base station switches the DCI format for performing downlink scheduling on the terminal from DCI1-0 to DCI 1-1.
The embodiment of the invention provides a base station, which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the processor realizes the steps of the terminal scheduling method when executing the computer program.
The embodiment of the invention provides a terminal, which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the processor realizes the steps of the terminal scheduling method when executing the computer program.
An embodiment of the present invention provides a non-transitory computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the terminal scheduling method.
In the terminal scheduling method, the base station and the terminal provided by the embodiment of the invention, after the RRC reconfiguration message is sent to the terminal, the DCI format for carrying out uplink scheduling on the terminal is switched from the DCI0-0 to the DCI0-1, and then the DCI format for carrying out downlink scheduling on the terminal is switched from the DCI1-0 to the DCI1-1 when the uplink data packet or SR sent by the terminal is received, so that the two switching processes of the DCI format are realized, the triggering event during the two switching processes is determined, compared with the prior art, the base station does not need to wait for receiving the RRC reconfiguration message and then revises the switched DCI format, the timeliness of DCI format switching is improved, the switched DCI format can be used for scheduling larger data volume as soon as possible, and the problem that the time consumed by the base station from the sending of the RRC reconfiguration message to the receiving of the RRC reconfiguration completion signaling is overlong in the prior art is avoided, in the period, only a small data volume can be scheduled when the DCI0-0 and the DCI1-0 are adopted, and the data throughput of the user is influenced.
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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a flowchart illustrating steps of a terminal scheduling method applied to a base station according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating steps of a terminal scheduling method applied to a terminal according to an embodiment of the present invention;
fig. 3 is a schematic overall flow chart of a terminal scheduling method in the embodiment of the present invention;
fig. 4 is a block diagram of a terminal scheduling apparatus applied to a base station in an embodiment of the present invention;
fig. 5 is a block diagram of a terminal scheduling apparatus applied to a terminal in an embodiment of the present invention;
FIG. 6 is a diagram illustrating a base station according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a terminal in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.
As shown in fig. 1, a flowchart of a terminal scheduling method applied to a base station in the embodiment of the present invention is shown, where the method includes the following steps:
step 101: after the RRC establishment message is sent to the terminal, the terminal is subjected to uplink scheduling through the DCI0-0 format, and is subjected to downlink scheduling through the DCI1-0 format.
In this step, specifically, after sending the RRC establishment message to the terminal, the base station performs uplink scheduling on the terminal through the DCI0-0 format, and performs downlink scheduling on the terminal through the DCI1-0 format.
Step 102: and after the RRC reconfiguration message is sent to the terminal, switching the DCI format for carrying out uplink scheduling on the terminal from the DCI0-0 to the DCI 0-1.
In this step, specifically, after the base station sends the RRC reconfiguration message to the terminal, the DCI format for performing uplink scheduling on the terminal is switched from DCI0-0 to DCI0-1, that is, the base station does not need to wait until receiving the RRC reconfiguration complete signaling and then revises the switched DCI0-1 format, so that a larger data volume can be scheduled by using the switched DCI0-1 format as soon as possible.
Of course, it should be noted here that the terminal is also scheduled downlink in DCI1-0 format at this time.
Step 103: and when receiving an uplink data packet or SR sent by the terminal, switching the DCI format for downlink scheduling of the terminal from the DCI1-0 to the DCI 1-1.
In this step, specifically, when receiving the uplink data packet or SR transmitted by the terminal, the base station switches the DCI format for performing downlink scheduling on the terminal from DCI1-0 to DCI1-1, thereby implementing downlink switching of the DCI format, and enabling the base station to schedule the terminal by using the switched DCI1-1 format.
Thus, in the embodiment, after the RRC reconfiguration message is sent to the terminal, the DCI format for performing uplink scheduling on the terminal is switched from DCI0-0 to DCI0-1, and then when an uplink data packet or SR sent by the terminal is received, the DCI format for performing downlink scheduling on the terminal is switched from DCI1-0 to DCI1-1, so that two switching processes on the DCI format are realized, and a trigger event during the two switching processes is defined, compared with the existing scheme, the DCI format is regenerated without waiting for receiving the RRC reconfiguration message by the base station, so that the timeliness of DCI format switching is improved, a new DCI format can be used as soon as possible to schedule a larger data volume, and the problem that in the prior art, when the base station takes too long time from sending the RRC reconfiguration message to receiving the RRC reconfiguration complete signaling, only a small data volume can be scheduled by using DCI0-0 and DCI1-0 all the time is avoided, the problem of affecting the user data throughput.
Of course, it should be noted herein that when the base station sends the RRC setup message to the terminal, the base station may send the RRC setup message to the terminal when detecting that the terminal has random access, where DCI formats of the terminal-specific search space carried in the RRC setup message are DCI0-0 and DCI 1-0.
Specifically, when the RRC setup message carries the DCI format, a search space may be added to a search space addition modification list (search space to add modlist) under a physical downlink control channel configuration command (PDCCH-Config for short) cell in the RRC setup message, where the DCI format of the terminal-specific search space in the search space is configured as DCI0-0 and DCI 1-0.
That is, when the terminal randomly accesses, the base station needs to issue an RRC setup message for the terminal. Specifically, when the terminal randomly accesses, the base station does not know the capability of the terminal, so several parameters related to the capability of the terminal (for example, channel Sounding Reference Signal (SRS) configuration, uplink transmission configuration parameter (txconfig), and the like) cannot be configured for the terminal; at this time, based on the fact that the sizes of the DCI0-1 and the DCI1-1 format are related to the parameters, if the parameters cannot be confirmed, the terminal cannot recognize the DCI0-1 and the DCI1-1 format, and therefore the base station can only configure the DCI formats of the dedicated search space for the terminal as DCI0-0 and DCI1-0, that is, the base station performs scheduling for the terminal by using the DCI0-0 and the DCI 1-0.
Of course, at this time, a set of search spaces (SearchSpace) may be added to SearchSpace toaddmodlist under the PDCCH-Config cell in the RRC establishment signaling, wherein the DCI format (ue-Specific DCI-Formats) attribute of the terminal-Specific search spaces in the SearchSpace may be configured as DCI0-0 and DCI 1-0.
In addition, it should be noted that, when the base station sends the RRC reconfiguration message to the terminal, the base station may send the RRC reconfiguration message to the terminal based on the terminal capability, where DCI formats of the terminal-specific search space carried in the RRC reconfiguration message are DCI0-1 and DCI 1-1.
Specifically, when the RRC reconfiguration message carries the DCI format, a search space may be added in the searchSpacesToAddModList in the PDCCH-Config cell in the RRC reconfiguration message, where the DCI formats of the terminal-specific search spaces in the search space are configured as DCI0-1 and DCI 1-1.
Of course, before sending the RRC reconfiguration message to the terminal based on the terminal capability, the base station also needs to send a terminal capability query message to the terminal; and receiving the terminal capability fed back by the terminal based on the terminal capability query message.
That is, after the base station issues the terminal capability query message and the terminal replies the capability message, the base station may issue the RRC reconfiguration message to the terminal according to the terminal capability to update the parameters that are not determined during RRC establishment. In addition, in the embodiment, a set of terminal-specific search spaces with formats of DCI0-1 and DCI1-1 is configured in the RRC reconfiguration message, which reduces the time for the terminal to perform DCI blind detection compared with the prior art, thereby reducing the power consumption of the terminal.
It should be noted that the terminal capability indicates the data processing capability supported by the terminal, such as download rate, upload rate, maximum space division multiplexing, modulation and coding capability, and so on.
Thus, in the embodiment, by switching the DCI format twice, and after sending an RRC reconfiguration message to the terminal, switching the DCI format for the first time, switching the DCI format for performing uplink scheduling on the terminal from DCI0-0 to DCI0-1, and switching the DCI format for the second time when receiving an uplink data packet or SR request sent by the terminal, and switching the DCI format for performing downlink scheduling on the terminal from DCI1-0 to DCI1-1, it is achieved that the base station does not need to wait until receiving an RRC reconfiguration complete message and then regenerate the new DCI format, thereby improving the timeliness of DCI format switching, enabling to schedule a larger data volume as soon as possible by using a new DCI format, avoiding that in the prior art, the base station takes too long time from sending the RRC reconfiguration message to receiving the RRC reconfiguration complete signaling, and only scheduling a smaller data volume by using DCI0-0 and DCI1-0 all the time, the problem of affecting the user data throughput.
In addition, as shown in fig. 2, a terminal scheduling method applied to a terminal in the embodiment of the present invention includes the following steps:
step 201: after receiving the RRC establishment message sent by the base station, carrying out uplink scheduling according to the DCI0-0 format, and carrying out downlink scheduling according to the DCI1-0 format.
In this step, specifically, when the terminal receives an RRC establishment message sent by the base station, uplink scheduling is performed according to the DCI0-0 format, and downlink scheduling is performed according to the DCI1-0 format.
Step 202: and after receiving the RRC reconfiguration message sent by the base station, switching the DCI format for uplink scheduling from the DCI0-0 to the DCI 0-1.
In this step, specifically, after receiving the RRC reconfiguration message sent by the base station, the terminal switches the DCI format for performing uplink scheduling from DCI0-0 to DCI 0-1.
At this time, the DCI format for uplink scheduling is firstly switched from DCI0-0 to DCI0-1, so that the terminal can perform uplink scheduling by adopting the DCI0-1 format in the first time after the DCI format subjected to effective switching, namely the DCI0-1, is effective.
Step 203: and sending an uplink data packet or SR to the base station so that the base station switches the DCI format for downlink scheduling of the terminal from the DCI1-0 to the DCI 1-1.
In this step, specifically, after receiving the RRC reconfiguration message and switching the DCI format to DCI0-1, the terminal may further send an uplink data packet or SR to the base station, so that the base station switches the DCI format for downlink scheduling for the terminal from DCI1-0 to DCI1-1, thereby implementing downlink switching of the DCI format.
When there is uplink data scheduling, the uplink data packet may be sent to the base station when the uplink data packet or the SR is sent to the base station; and when no uplink data is scheduled, transmitting the SR to the base station.
That is, the terminal will take effect of the DCI format after switching after receiving the RRC reconfiguration message, and at this time, different actions will be executed according to whether there is an uplink data packet (i.e., uplink buffer occupancy BO). When uplink data packets are scheduled, the base station can continuously adopt DCI0-1 to schedule data for the terminal, and after the terminal takes effect of DCI0-1, the switched DCI0-1 can be successfully identified, so that the uplink data packets can be transmitted to the base station at the first time, the base station can perform second switching on DCI formats when receiving the uplink data packets transmitted by the terminal, namely, the downlink adopts the switched DCI1-1 format to schedule the terminal, and the uplink uses the switched DCI0-1 to schedule the terminal. When there is no uplink data packet, the base station does not schedule the terminal, but the terminal applies for uplink scheduling to the base station in order to send an RRC reconfiguration complete message, that is, sends an SR to the base station; at this time, the base station receives the SR sent by the terminal and switches the DCI format for the second time, that is, the downlink uses the switched DCI1-1 format to schedule the terminal, and the uplink uses the switched DCI0-1 format to schedule the terminal.
In addition, further, before the terminal performs uplink scheduling according to the DCI0-0 format and performs downlink scheduling according to the DCI1-0 format, the terminal also needs to receive an RRC establishment message sent by the base station, where DCI formats of the terminal-specific search space carried in the RRC establishment message are DCI0-0 and DCI 1-0.
Specifically, when the RRC establishment message carries the DCI format, a search space is added to a search space addition modification list (searchSpacesToAddModList) in a PDCCH-Config cell in the RRC establishment message, where the DCI format of a terminal-specific search space in the search space is configured as DCI0-0 and DCI 1-0.
It should be noted that, for the content of the RRC setup message, reference may be made to the above-mentioned embodiment on the base station side, and details are not described herein again.
In addition, further, before the terminal switches the DCI format for performing uplink scheduling from DCI0-0 to DCI0-1, the terminal also receives an RRC reconfiguration message sent by the base station, where the DCI formats of the terminal-specific search space carried in the RRC reconfiguration message are DCI0-1 and DCI 1-1.
Specifically, when the RRC reconfiguration message carries the DCI format, a search space may be added to the searchSpacesToAddModList in the PDCCH-Config cell in the RRC reconfiguration message, where the DCI formats of the terminal-specific search spaces in the search space are configured as DCI0-1 and DCI 1-1.
In addition, specifically, before the terminal receives the RRC reconfiguration message sent by the base station, the terminal needs to receive a terminal reception capability query message sent by the base station, and feed back the terminal capability to the base station according to the terminal capability query message, so that the base station can send the RRC reconfiguration message based on the terminal capability.
Of course, it should be further noted that, for the content of the RRC reconfiguration message, reference may be made to the above-mentioned embodiment on the base station side, and details are not described herein again.
In this embodiment, after receiving an RRC setup message, the terminal performs uplink and downlink scheduling through DCI0-0 format and DCI0-1 format, and then switches the DCI format for uplink scheduling from DCI0-0 to DCI0-1 after receiving an RRC reconfiguration message, and sends an uplink data packet or SR to the base station, so that the base station switches the DCI format for downlink scheduling for the terminal from DCI1-0 to DCI1-1, thereby implementing two switching processes for the DCI format and defining a trigger event during the two switching processes, compared with the existing scheme, implementing that the base station does not need to wait for receiving an RRC reconfiguration message and then re-enables a new DCI format, thereby improving timeliness of DCI format switching, enabling a new DCI format to be used as soon as possible to schedule a larger data volume, and avoiding time consumption from RRC reconfiguration message transmission by the base station to RRC reconfiguration complete signaling reception in the prior art, in the period, only a small data volume can be scheduled when the DCI0-0 and the DCI1-0 are adopted, and the data throughput of the user is influenced.
Thus, in the present embodiment, the DCI formats of the fixed dedicated search space in the configuration parameters for the terminal through the RRC establishment message are DCI0-0 and DCI1-0, and the SRS resource parameter and the uplink transmission configuration txconfig parameter are not configured, the DCI formats for the dedicated search space configured in the parameters for the terminal through the RRC reconfiguration message are DCI0-1 and DCI1-1, the SRS resource parameter and the uplink transmission configuration txconfig parameter are configured, and the DCI formats for the dedicated search space of the MAC layer at the base station side are configured as DCI0-1 and DCI 1-1; the DCI format is switched through the embodiment, so that the terminal with the downlink DCI1-1 format takes effect first, the base station takes effect later, the base station with the uplink DCI0-1 format takes effect first, and the terminal takes effect later, thereby solving the problem that the terminal access failure cannot complete the NR service index because the base station and the terminal side DCI formats are inconsistent and the expected scheduling result is not met when the terminal access process is performed with the configuration of the DCI formats and the parameters of the terminal and the base station are configured simultaneously by the high layer during the DCI format switching.
The overall flow of the present embodiment will be described with reference to fig. 3.
Referring to fig. 3, in step 300, when the terminal randomly accesses, the base station issues an RRC setup message for the terminal. At this time, since the base station does not know the capability of the terminal, several parameters related to the capability of the terminal cannot be configured for the terminal, such as SSR configuration parameters, uplink transmission configuration parameters txconfig, and the like. The sizes of the DCI0-1 and the DCI1-1 formats are related to the parameters, if the parameters cannot be confirmed, the terminal cannot identify the DCI0-1 and the DCI1-1 formats, so that the base station can only configure the dedicated search space formats as the DCI0-0 and the DCI1-0 for the terminal, and the base station can perform scheduling by using the DCI0-0 and the DCI1-0 for the terminal.
Specifically, only one set of SearchSpace may be added to SearchSpace toaddmodlist in the PDCCH-Config cell in the RRC establishment message. Wherein the ue-Specific dci-Formats attribute in SearchSpace is configured as Formats 0-0-And-1-0.
In step 310, after the base station issues the terminal capability query message and the terminal replies to its terminal capability, the base station issues an RRC reconfiguration message to update the parameters that are not determined during RRC establishment according to the terminal capability.
In addition, compared with the existing method, in the reconfiguration message, the invention only configures one set of search spaces, and the formats of the special search spaces are DCI0-1 and DCI 1-1.
Specifically, only one set of SearchSpace is added to the searchSpaceToAddModList under the PDCCH-Config cell in the RRC reconfiguration message. Wherein the ue-Specific dci-Formats attribute in SearchSpace is configured as Formats 0-1-And-1-1.
In step 320, the base station switches the DCI format for the first time after issuing the RRC reconfiguration signaling, that is, the uplink uses the switched DCI0-1 to schedule the terminal, and the downlink uses the non-switched DCI1-0 to schedule the terminal.
That is, before the base station issues the RRC reconfiguration message to the second DCI format switch, the base station may schedule data for the terminal according to the policy after the first DCI format switch.
In addition, the purpose of switching the uplink DCI format in advance is to enable the terminal to perform uplink scheduling by using the switched DCI format for the first time after the DCI format after switching is validated, because only one set of search spaces are configured, and the dedicated search space formats of the search spaces are DCI0-1 and DCI 1-1. Therefore, the uplink must be switched to DCI0-1 in advance, otherwise the terminal cannot use DCI0-0 before switching to perform data scheduling after the DCI format after switching is validated.
In step 330, the terminal receives the RRC reconfiguration message and then validates the DCI format after switching, and at this time, performs different actions according to whether there is an uplink data packet, i.e. uplink BO:
when uplink BO exists, the base station can continuously adopt DCI0-1 to schedule data for the terminal, and the terminal can successfully identify the switched DCI0-1 after taking effect of the switched DCI format, so that the uplink data packet can be sent to the base station at the first time; when there is no BO in the uplink, the base station does not schedule data for the terminal, but the terminal applies for uplink scheduling to the base station in order to transmit a reconfiguration complete message, and at this time, SR signaling is transmitted.
In step 340, when there is an uplink BO, the base station receives the uplink data packet sent by the terminal, and then switches the DCI format for the second time: and the downlink adopts the switched DCI1-1 format to schedule the terminal, and the uplink adopts the switched DCI0-1 format to schedule the terminal.
In step 350, when there is no uplink BO, the base station receives the SR signaling sent by the terminal, and then performs a second switching on the DCI format: and the downlink adopts the switched DCI1-1 format to schedule the terminal, and the uplink adopts the switched DCI0-1 format to schedule the terminal.
The present embodiment is explained below by way of specific examples.
In a first embodiment, if a terminal does not have uplink data scheduling (uplink BO), then:
when the terminal randomly accesses, the base station needs to establish an RRC message issued by the terminal. The base station configures the terminal with the dedicated search space formats of DCI0-0 and DCI1-0 at this time. Specifically, only one set of SearchSpace is added to the searchSpaceToAddModList under the PDCCH-Config cell in the RRC establishment signaling. Wherein the ue-Specific dci-Formats attribute in SearchSpace is configured as Formats 0-0-And-1-0.
Then, after the base station issues a terminal capability query message and the terminal replies the capability information, the base station issues an RRC reconfiguration message for the terminal according to the terminal capability to update the parameters which are not determined during RRC establishment. The base station only configures a set of search spaces for the terminal, and the formats of the dedicated search spaces are DCI0-1 and DCI 1-1. Specifically, only one set of SearchSpace is added in the SearchSpaceToAddModList table under the PDCCH-Config cell in the RRC reconfiguration message. Wherein the ue-Specific dci-Formats attribute in SearchSpace is configured as Formats 0-1-And-1-1.
And then, after the RRC reconfiguration message is issued, the base station switches the DCI format for the first time, the uplink uses the switched DCI0-1 format to schedule the terminal, and the downlink uses the DCI1-0 format before switching to schedule the terminal. Before the base station issues the RRC reconfiguration message to the second DCI format switching, the base station can schedule data for the terminal according to the strategy after the first DCI format switching.
Then, after receiving the RRC reconfiguration message, the terminal will take effect of the DCI format after switching, and when there is no BO in the uplink, the base station will not schedule data for the terminal, but the terminal will apply for uplink scheduling to the base station in order to send a reconfiguration complete signaling, and at this time, will send an SR signaling.
Then, the base station receives the SR sent by the terminal, and then performs a second switching on the DCI format: and the downlink adopts the switched DCI1-1 format to schedule the UE, and the uplink adopts the switched DCI0-1 format to schedule the terminal.
In the second embodiment, if the terminal has uplink data scheduling (uplink BO), then:
when the terminal randomly accesses, the base station needs to establish an RRC message issued by the terminal. The base station configures the terminal with the dedicated search space formats of DCI0-0 and DCI1-0 at this time. Specifically, only one set of SearchSpace is added to the searchSpaceToAddModList under the PDCCH-Config cell in the RRC establishment signaling. Wherein the ue-Specific dci-Formats attribute in SearchSpace is configured as Formats 0-0-And-1-0.
Then, after the base station issues a terminal capability query message and the terminal replies the capability information, the base station issues an RRC reconfiguration message for the terminal according to the terminal capability to update the parameters which are not determined during RRC establishment. The base station only configures a set of search spaces for the terminal, and the formats of the dedicated search spaces are DCI0-1 and DCI 1-1. Specifically, only one set of SearchSpace is added in the SearchSpaceToAddModList table under the PDCCH-Config cell in the RRC reconfiguration message. Wherein the ue-Specific dci-Formats attribute in SearchSpace is configured as Formats 0-1-And-1-1.
And then, after the RRC reconfiguration message is issued, the base station switches the DCI format for the first time, the uplink uses the switched DCI0-1 format to schedule the terminal, and the downlink uses the DCI1-0 format before switching to schedule the terminal. Before the base station issues the RRC reconfiguration message to the second DCI format switching, the base station can schedule data for the terminal according to the strategy after the first DCI format switching.
Then, after the terminal receives the RRC reconfiguration message, the DCI format after the switching is validated, the base station may continuously use DCI0-1 to schedule data for the terminal, and after the DCI format after the switching is validated, the terminal may successfully recognize the DCI0-1 after the switching, thereby ensuring that the uplink data packet is transmitted to the base station at the first time.
Then, the base station receives the uplink data packet sent by the terminal, and then performs the second switching on the DCI format: and the downlink adopts the switched DCI1-1 format to schedule the terminal, and the uplink adopts the switched DCI0-1 format to schedule the terminal.
In addition, as shown in fig. 4, a block diagram of a terminal scheduling apparatus applied to a base station in the embodiment of the present invention is shown, and the apparatus includes:
a scheduling module 401, configured to perform uplink scheduling on a terminal according to a format of downlink control information DCI0-0 and perform downlink scheduling on the terminal according to a format of DCI1-0 after sending a radio resource control RRC setup message to the terminal;
a first switching module 402, configured to switch a DCI format for performing uplink scheduling on the terminal from DCI0-0 to DCI0-1 after sending an RRC reconfiguration message to the terminal;
a second switching module 403, configured to switch a DCI format for performing downlink scheduling on the terminal from DCI1-0 to DCI1-1 when receiving an uplink data packet or a scheduling request SR sent by the terminal.
Optionally, the method further comprises: a first sending module, configured to send an RRC establishment message to the terminal when detecting that the terminal is randomly accessed, where DCI formats of a terminal-specific search space carried in the RRC establishment message are DCI0-0 and DCI 1-0.
Optionally, a search space is added to a search space addition modification list searchspacetodoadmodlist under a PDCCH-Config cell of a physical downlink control channel configuration command in the RRC setup message, wherein DCI formats of terminal-specific search spaces in the search space are configured as DCI0-0 and DCI 1-0.
Optionally, the method further comprises: and a second sending module, configured to send the RRC reconfiguration message to the terminal based on a terminal capability, where DCI formats of the terminal-specific search space carried in the RRC reconfiguration message are DCI0-1 and DCI 1-1.
Optionally, a search space is added to a search space under a PDCCH-Config cell in the RRC reconfiguration message, wherein DCI formats of terminal-specific search spaces in the search space are configured as DCI0-1 and DCI 1-1.
It should be noted that, the apparatus provided in this embodiment can implement all the method steps of the base station side method embodiment and achieve the same technical effect, and the method steps and the beneficial effects that are the same as those of the method embodiment in this embodiment are not specifically described herein.
In addition, as shown in fig. 5, a block diagram of a terminal scheduling apparatus applied to a terminal in the embodiment of the present invention is shown, and the apparatus includes:
a scheduling module 501, configured to perform uplink scheduling according to a downlink control information DCI0-0 format and perform downlink scheduling according to a DCI1-0 format after receiving a radio resource control RRC establishment message sent by a base station;
a first switching module 502, configured to switch a DCI format for performing uplink scheduling from DCI0-0 to DCI0-1 after receiving the RRC reconfiguration message sent by the base station;
a second switching module 503, configured to send an uplink data packet or a scheduling request SR to the base station, so that the base station switches the DCI format for performing downlink scheduling on the terminal from DCI1-0 to DCI 1-1.
Optionally, the method further comprises: a first receiving module, configured to receive an RRC setup message sent by the base station, where DCI formats of a terminal-specific search space carried in the RRC setup message are DCI0-0 and DCI 1-0.
Optionally, a search space is added to a search space addition modification list searchspacetodoadmodlist under a PDCCH-Config cell of a physical downlink control channel configuration command in the RRC setup message, wherein DCI formats of terminal-specific search spaces in the search space are configured as DCI0-0 and DCI 1-0.
Optionally, the method further comprises: a second receiving module, configured to receive an RRC reconfiguration message sent by the base station, where DCI formats of terminal-specific search spaces carried in the RRC reconfiguration message are DCI0-1 and DCI 1-1.
Optionally, a search space is added to a search space under a PDCCH-Config cell in the RRC reconfiguration message, wherein DCI formats of terminal-specific search spaces in the search space are configured as DCI0-1 and DCI 1-1.
It should be noted that the apparatus provided in this embodiment is capable of implementing all the method steps of the terminal-side method embodiment and achieving the same technical effect, and the method steps and the advantageous effects that are the same as those of the method embodiment in this embodiment are not specifically described herein.
In addition, as shown in fig. 6, an entity structure diagram of a base station provided in the embodiment of the present invention is shown, where the base station may include: a processor (processor)610, a communication Interface (Communications Interface)620, a memory (memory)630 and a communication bus 640, wherein the processor 610, the communication Interface 620 and the memory 630 communicate with each other via the communication bus 640. The processor 610 may invoke a computer program stored on the memory 630 and executable on the processor 610 to perform the following steps:
after a Radio Resource Control (RRC) establishment message is sent to a terminal, uplink scheduling is carried out on the terminal through a Downlink Control Information (DCI) 0-0 format, and downlink scheduling is carried out on the terminal through a DCI1-0 format; after an RRC reconfiguration message is sent to the terminal, the DCI format for carrying out uplink scheduling on the terminal is switched from DCI0-0 to DCI 0-1; and when receiving an uplink data packet or a scheduling request SR sent by the terminal, switching the DCI format for downlink scheduling of the terminal from DCI1-0 to DCI 1-1.
It should be noted that, the base station provided in this embodiment can implement all the method steps of the base station side method embodiment and can achieve the same technical effect, and the method steps and the beneficial effects that are the same as those of the method embodiment in this embodiment are not specifically described herein.
In addition, the logic instructions in the memory 630 may be implemented in software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In addition, as shown in fig. 7, an entity structure diagram of a terminal provided in the embodiment of the present invention is shown, where the terminal may include: a processor (processor)710, a communication Interface (Communications Interface)720, a memory (memory)730, and a communication bus 740, wherein the processor 710, the communication Interface 720, and the memory 730 communicate with each other via the communication bus 740. The processor 710 may invoke a computer program stored on the memory 730 and executable on the processor 710 to perform the following steps:
after receiving a Radio Resource Control (RRC) establishment message sent by a base station, performing uplink scheduling according to a Downlink Control Information (DCI) 0-0 format, and performing downlink scheduling according to a DCI1-0 format; after receiving the RRC reconfiguration message sent by the base station, switching the DCI format for uplink scheduling from DCI0-0 to DCI 0-1; and sending an uplink data packet or a scheduling request SR to the base station so that the base station switches the DCI format for downlink scheduling of the terminal from DCI1-0 to DCI 1-1.
It should be noted that, the terminal provided in this embodiment is capable of implementing all the method steps of the terminal-side method embodiment and achieving the same technical effect, and the method steps and the advantageous effects that are the same as those of the method embodiment in this embodiment are not specifically described here.
In addition, the logic instructions in the memory 730 can be implemented in the form of software functional units and stored in a computer readable storage medium when the software functional units are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Embodiments of the present invention also provide a non-transitory computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the methods provided by the above embodiments.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (18)
1. A terminal scheduling method is applied to a base station, and is characterized by comprising the following steps:
after a Radio Resource Control (RRC) establishment message is sent to a terminal, uplink scheduling is carried out on the terminal through a Downlink Control Information (DCI) 0-0 format, and downlink scheduling is carried out on the terminal through a DCI1-0 format;
after an RRC reconfiguration message is sent to the terminal, the DCI format for carrying out uplink scheduling on the terminal is switched from DCI0-0 to DCI 0-1;
and when receiving an uplink data packet or a scheduling request SR sent by the terminal, switching the DCI format for downlink scheduling of the terminal from DCI1-0 to DCI 1-1.
2. The terminal scheduling method of claim 1, further comprising:
and when the random access of the terminal is detected, sending an RRC establishment message to the terminal, wherein the DCI formats of the terminal-specific search space carried in the RRC establishment message are DCI0-0 and DCI 1-0.
3. The terminal scheduling method of claim 2, wherein a search space is added to a search space addition modification list searchspacetodoaddlmodlist under a PDCCH-Config cell configuration command in the RRC setup message, wherein DCI formats of terminal-specific search spaces in the search space are DCI0-0 and DCI 1-0.
4. The terminal scheduling method of claim 1, further comprising:
and sending the RRC reconfiguration message to the terminal based on the terminal capability, wherein the DCI formats of the terminal-specific search space carried in the RRC reconfiguration message are DCI0-1 and DCI 1-1.
5. The terminal scheduling method of claim 4, wherein a search space is added to searchSpacesToAddModList under a PDCCH-Config information element in the RRC reconfiguration message, and DCI formats of terminal-specific search spaces in the search space are DCI0-1 and DCI 1-1.
6. The terminal scheduling method according to claim 4, wherein before sending the RRC reconfiguration message to the terminal based on the terminal capability, the method further comprises:
sending a terminal capability query message to the terminal;
and receiving the terminal capability fed back by the terminal based on the terminal capability query message.
7. A terminal scheduling method is applied to a terminal, and is characterized by comprising the following steps:
after receiving a Radio Resource Control (RRC) establishment message sent by a base station, performing uplink scheduling according to a Downlink Control Information (DCI) 0-0 format, and performing downlink scheduling according to a DCI1-0 format;
after receiving the RRC reconfiguration message sent by the base station, switching the DCI format for uplink scheduling from DCI0-0 to DCI 0-1;
and sending an uplink data packet or a scheduling request SR to the base station so that the base station switches the DCI format for downlink scheduling of the terminal from DCI1-0 to DCI 1-1.
8. The terminal scheduling method of claim 7, further comprising:
and receiving an RRC establishment message sent by the base station, wherein the DCI formats of the terminal-specific search space carried in the RRC establishment message are DCI0-0 and DCI 1-0.
9. The terminal scheduling method of claim 8, wherein a search space is added to a search space addition modification list searchspacetodoaddlmodlist under a PDCCH-Config cell configuration command in the RRC setup message, wherein DCI formats of terminal-specific search spaces in the search space are DCI0-0 and DCI 1-0.
10. The terminal scheduling method of claim 7, further comprising:
and receiving an RRC reconfiguration message sent by the base station, wherein the DCI formats of the terminal-specific search space carried in the RRC reconfiguration message are DCI0-1 and DCI 1-1.
11. The terminal scheduling method of claim 10, wherein a search space is added to searchSpacesToAddModList under PDCCH-Config information element in the RRC reconfiguration message, wherein DCI formats of terminal-specific search spaces in the search space are DCI0-1 and DCI 1-1.
12. The terminal scheduling method according to claim 10, wherein before receiving the RRC reconfiguration message sent by the base station, the method further comprises:
receiving a terminal capability query message sent by the base station;
and feeding back the terminal capability to the base station according to the terminal capability query message.
13. The terminal scheduling method according to claim 7, wherein the sending the uplink data packet or the scheduling request SR to the base station comprises:
when uplink data are scheduled, the uplink data packets are sent to the base station;
and when no uplink data is scheduled, transmitting the SR to the base station.
14. A terminal scheduling apparatus applied to a base station, comprising:
the scheduling module is used for carrying out uplink scheduling on the terminal through a downlink control information DCI0-0 format and carrying out downlink scheduling on the terminal through a DCI1-0 format after a Radio Resource Control (RRC) establishment message is sent to the terminal;
the first switching module is used for switching the DCI format for performing uplink scheduling on the terminal from DCI0-0 to DCI0-1 after the RRC reconfiguration message is sent to the terminal;
and the second switching module is used for switching the DCI format for performing downlink scheduling on the terminal from DCI1-0 to DCI1-1 when receiving an uplink data packet or a scheduling request SR sent by the terminal.
15. A terminal scheduling device applied to a terminal is characterized by comprising:
the scheduling module is used for performing uplink scheduling according to a downlink control information DCI0-0 format and performing downlink scheduling according to a DCI1-0 format after receiving a Radio Resource Control (RRC) establishment message sent by a base station;
the first switching module is used for switching the DCI format for uplink scheduling from DCI0-0 to DCI0-1 after receiving the RRC reconfiguration message sent by the base station;
and the second switching module is used for sending an uplink data packet or a scheduling request SR to the base station so that the base station switches the DCI format for performing downlink scheduling on the terminal from DCI1-0 to DCI 1-1.
16. A base station comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the terminal scheduling method according to any of claims 1 to 6 when executing the computer program.
17. A terminal comprising a memory, a processor and a computer program stored on the memory and being executable on the processor, characterized in that the processor implements the steps of the terminal scheduling method according to any of claims 7 to 13 when executing the computer program.
18. A non-transitory computer readable storage medium, having stored thereon a computer program, characterized in that the computer program, when being executed by a processor, is adapted to carry out the steps of the terminal scheduling method according to any one of claims 1 to 6 or the steps of the terminal scheduling method according to any one of claims 7 to 13.
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