CN112040557B - Uplink data transmission method and device in random access process - Google Patents
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/002—Transmission of channel access control information
- H04W74/004—Transmission of channel access control information in the uplink, i.e. towards network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/002—Transmission of channel access control information
- H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
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Abstract
The application discloses an uplink data transmission method in a random access process, which comprises the following steps: acquiring configuration information to obtain N PUSCH transmission resources and formats thereof; obtaining an actual transmission block number M according to the number R of the effective PUSCH transmission resources, the number K of the required transmission blocks and the number S of the currently supported maximum transmission blocks, and determining an actual PUSCH transmission resource format from the configured PUSCH transmission resource formats, wherein M is min (R, S, K); and N is an integer greater than or equal to 1, N is equal to the repeated transmission aggregation parameter contained in the configuration information, R is less than or equal to N, and the number of the PUSCH transmission resources is the actual effective PUSCH transmission resource number. The application also includes a device applying the method. The method and the device solve the problems of low transmission efficiency, high collision probability and no support of PUSCH retransmission in the random access process, and are particularly suitable for the 4-step RACH technology of a mobile communication system.
Description
Technical Field
The present application relates to the field of mobile communications technologies, and in particular, to a method and an apparatus for uplink data transmission in a random access process.
Background
In mobile communication systems, such as 4G LTE and 5G systems, Random Access technologies including 4-step RACH (Random Access Channel) technology are used, and 5 times of information interaction between a terminal and a base station is required to complete a Random Access procedure. In the existing 4-step RACH, on one hand, the data amount that can be transmitted by uplink shared channel (PUSCH) resources transmitted for Msg3 in the current standard is limited by a default PUSCH resource list (e.g., PUSCH transmission resource list defaultA in 38.213) or a common PUSCH resource list configured at a higher layer, which may cause the supportable transmission data amount of the allocated PUSCH to be lower than the terminal requirement, and cause the terminal to be unable to transmit data to be transmitted with Msg3, thereby reducing transmission efficiency; on the other hand, the current standard does not support PUSCH retransmission scheduled based on uplink Grant (UL Grant) in Random Access Response (RAR), and the main problem of the retransmission mechanism based on DCI is to introduce new scheduling signaling overhead and scheduling delay, thereby reducing transmission efficiency.
Disclosure of Invention
The application provides an uplink data transmission method and equipment in a Random Access process, solves the problems that the existing method is low in transmission efficiency and high in collision probability, and does not support PUSCH retransmission in the Random Access process, and is particularly suitable for a 4-step RACH (Random Access Channel) technology of a mobile communication system.
In a first aspect, the present application provides an uplink data transmission method in a random access process, which is used for a four-step RACH, and includes the following steps:
acquiring configuration information to obtain N PUSCH transmission resources and formats thereof; obtaining an actual transmission block number M according to the number R of the effective PUSCH transmission resources, the number K of the required transmission blocks and the number S of the currently supported maximum transmission blocks, and determining an actual PUSCH transmission resource format from the configured PUSCH transmission resource formats, wherein M is min (R, S, K); and N is an integer greater than or equal to 1, N is equal to the repeated transmission aggregation parameter contained in the configuration information, R is less than or equal to N, and the number of the PUSCH transmission resources is the actual effective PUSCH transmission resource number.
Further, the configured PUSCH transmission resource format is at least one of: a first format: the N PUSCH transmission resources are N times of repeated transmission of one transmission block; the second format is: the N PUSCH transmission resources are P times of repeated transmission of M0 transmission blocks, and the transmission order is P times of repeated transmission of the mth PUSCH transmission resource followed by P times of repeated transmission of the M +1 th PUSCH transmission resource; the third format is: the N PUSCH transmission resources are P times of repeated transmission of M0 transmission blocks, and the transmission sequence is P0 xM 0+1, P0 xM 0+2, … …, P0 xM 0+ M0, and M0 PUSCH transmission resources correspond to the transmission of the 1 st, 2 nd, … … th and M0 transmission blocks respectively; wherein, M0 is the number of transport blocks, M0>1, P is the configured retransmission times, P is the configured value or P-ceil (N/M0), M is the transport block sequence number, M-1 to M0-1, P0 is the retransmission sequence number, and P0-0 to P-1.
Preferably, the current maximum number of supported transport blocks S is determined by a current RSRP measurement value and a preset correspondence between the maximum number of supported transport blocks and the RSRP measurement value.
Preferably, the N PUSCH transmission resources are PUSCH transmission resources of consecutive N slots and PUSCH transmission of each slot occupies the same symbol position, or N consecutive PUSCH transmissions with no symbol interval for adjacent PUSCH transmissions.
Preferably, the N PUSCH transmission resources transmit Z transmission blocks at most, where Z is the maximum number of transmission blocks supported by the system configuration.
Further, if M is 1, the actual PUSCH transmission resource format is the first format; if M >1, when the configured valid PUSCH transmission resource formats are the second and third formats, and the configured second and third formats both satisfy the transmission conditions of M transport blocks, the actual PUSCH transmission resource format is the second format or the third format.
Further, when the maximum number Z of transport blocks supported by the system configuration is greater than 1, the preset corresponding relationship between the maximum number of transport blocks supported and the RSRP measurement value is as follows: presetting Z-1 RSRP thresholds as a first threshold, a second threshold, … … and a Z-1 threshold; when Z is greater than 2, if the RSRP measurement value is less than or equal to the first threshold value, the number of the supported maximum transmission blocks is 1; if the a-th threshold value < the RSRP measurement value is not more than the a + 1-th threshold value, the number of the supported maximum transmission blocks is a + 1; if the RSRP measurement value is greater than the a +1 th threshold, the number of the supported maximum transport blocks is Z; wherein a is a threshold serial number, and a is more than or equal to 1 and less than or equal to Z-2; when Z is 2, if the RSRP measurement value is not greater than a first threshold, the number of supported maximum transport blocks is 1, and if the RSRP measurement value > the first threshold, the number of supported maximum transport blocks is Z.
Preferably, in the Z-1 RSRP thresholds, different retransmission times of a transport block correspond to different values of the RSRP threshold.
The method according to any one of the embodiments of the first aspect of the present application, applied to a terminal device, includes the following steps: receiving the configuration information; determining an actual PUSCH transmission resource format from the configured PUSCH transmission resource formats; transmitting data on the effective PUSCH transmission resources.
The method according to any one of the embodiments of the first aspect of the present application, for a network device, includes the following steps: receiving the configuration information of a high-level configuration; data is received on the active PUSCH transmission resources.
The method according to any one of the embodiments of the first aspect of the present application, for a network device, includes the following steps: sending the configuration information to terminal equipment; data is received on the active PUSCH transmission resources.
In a second aspect, the present application further provides an uplink data transmission terminal device in a random access process, where with the method in any of the first aspects of the present application, the device includes: the terminal receiving module is used for receiving the configuration information to obtain N PUSCH transmission resources and formats thereof; the terminal determining module is used for obtaining the actual number M of the transmission blocks according to the number R of the effective PUSCH transmission resources, the number K of the required transmission blocks and the number S of the currently supported maximum transmission blocks, and determining the actual PUSCH transmission resource format from the configured PUSCH transmission resource formats:
M＝min(R，S，K)
wherein, N is an integer greater than or equal to 1 based on the number of PUSCH transmission resources scheduled by RAR, N is equal to the repeat transmission aggregation parameter included in the configuration information, R is less than or equal to N, and is the actual effective number of PUSCH transmission resources; and the terminal sending module is used for sending the uplink data on the effective PUSCH transmission resource.
In a third aspect, the present application further provides an uplink data transmission network device in a random access process, where with the method in any of the first aspects of the present application, the device includes: a network determination module for determining the configuration information; a network receiving module for receiving data on the effective PUSCH transmission resource; and the network sending module is used for sending the configuration information.
The present application also provides an uplink data transmission device in a random access process, including: memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method according to any one of the embodiments of the first aspect of the application.
The present application also proposes a computer-readable medium on which a computer program is stored, which computer program, when being executed by a processor, carries out the steps of the method according to any one of the embodiments of the first aspect of the present application.
The present application further provides a mobile communication system, which includes the network device according to any embodiment of the present application and the terminal device according to any embodiment of the present application.
The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects:
the invention provides an uplink data transmission method in random access response, wherein a terminal acquires a transmission format of PUSCH transmission resources scheduled based on Random Access Response (RAR), the number of transmission blocks which can be transmitted is related to measurement RSRP, and one or more RSRP thresholds are set corresponding to the number of transmission blocks which can be transmitted by the terminal.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1(a) is a flow chart of an embodiment of the method of the present application;
FIG. 1(b) is a schematic diagram of a second format of an embodiment of the method of the present application;
FIG. 1(c) is a schematic diagram of a third format of an embodiment of the method of the present application;
FIG. 1(d) is a schematic diagram of format selection according to the embodiment of the present invention
FIG. 1(e) is a schematic diagram of another format selection of an embodiment of the method of the present application;
FIG. 2 is a flowchart of an embodiment of a method of the present application for a terminal device;
FIG. 3 is a flow chart of an embodiment of a method of the present application for a network device;
FIG. 4 is a flow chart of another embodiment of the method of the present application for use with a network device;
FIG. 5 is a schematic diagram of an embodiment of a terminal device;
FIG. 6 is a schematic diagram of an embodiment of a network device;
fig. 7 is a schematic structural diagram of a network device according to another embodiment of the present invention;
fig. 8 is a block diagram of a terminal device of another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In a mobile communication system, such as a 4G LTE and a 5G system, a Random Access technology including a 4-step RACH (Random Access Channel) technology is adopted, and a terminal and a base station need to perform 5 information interactions to complete a Random Access process, which are respectively: 1) the terminal sends a message Msg1 to the base station, wherein the Msg1 is a leader sequence and is used for the base station to carry out Timing Advance (TA) estimation; 2) the base station sends a message Msg2 to the terminal, wherein the Msg2 is a random access response of the Msg1 and comprises a leader sequence identifier, a TA (Timing Advance) indication, uplink authorization information of the Msg3 sent by the terminal to the base station, and a temporary cell radio network temporary identifier (TC-RNTI); 3) the terminal sends a message Msg3 to the base station, when the terminal reads a leader sequence identifier corresponding to Msg1 in Msg2, the terminal sends Msg3 by using an uplink authorization in Msg2, and the content of Msg3 is related to an event triggering a random access process; 4) and the base station sends a message Msg4 to the terminal, wherein the Msg4 is a response for solving the contention conflict, and when the Msg4 detected by the terminal contains the relevant contention conflict resolution identification information in the corresponding Msg3, the random access is considered to be successful. 5) The terminal that successfully detects Msg4 sends an ACK acknowledgement to the base station.
In mobile communication, there are a large number of requirements for state reporting, internet of things service and other massive uplink small data transmission, and uplink data transmission is only supported to occur in a Radio Resource Control (RRC) connection state at present, and RRC state switching needs to occur first in other RRC states to enable data transmission, thereby reducing transmission efficiency. Therefore, in B5G, the uplink data transmission mechanism of the terminal in the inactive state is designed to enhance the system performance. The Msg3 uplink data transmission based on 4-step RACH is a corresponding solution.
For Msg3 transmission of 4-step RACH, after introducing uplink small data transmission, higher requirements on the transmission efficiency and reliability of Msg3 are put forward. On the one hand, the system is required to support the Msg3 transmission requirements of different traffic volumes. The amount of data that can be transmitted by Physical Uplink Shared Channel (PUSCH) resources for Msg3 in the current standard is limited by a default PUSCH resource list in the standard (e.g., PUSCH transmission resource list defaultA in 38.213) or a common PUSCH resource list configured by a higher layer (e.g., PUSCH transmission resource list in common configuration information PUSCH-ConfigCommon in 38.331), and after small data packet transmission of multiple services is introduced, since the UE does not know its specific data amount transmission requirement before sending Msg3 (it may be determined how much the required data amount exceeds by sending a preamble sequence, but only a rough range), it is likely that the supportable transmission data amount of the allocated PUSCH is lower than the requirement of the terminal, so that the terminal cannot transmit data to be transmitted with Msg3, and transmission efficiency is reduced. On the other hand, the system is required to improve the transmission reliability of Msg3 as much as possible. When the transmission data amount of the Msg3 increases, the corresponding packet loss rate decreases. However, the current standard does not support PUSCH retransmission scheduled based on uplink Grant (UL Grant) in Random Access Response (RAR), so Msg3 scheduled based on UL Grant in RAR only supports one transmission, and when the base station does not successfully receive Msg3, Msg3 retransmission can be scheduled through DCI (Downlink control information). The main problem of the DCI-based retransmission mechanism is to introduce new scheduling signaling overhead and scheduling delay, which reduces transmission efficiency.
In order to improve the transmission reliability of Msg3, the prior art proposes a duplicate transmission technique supporting Msg3 and uplink transmission in RRC connected state, that is, a common Msg3 duplicate transmission aggregation parameter (e.g., Msg 3-aggregate factor) is configured at a higher layer, and when the terminal sends Msg3 with the parameter configured on a partial Bandwidth (BWP), Msg3 transmits multiple consecutive duplicates based on scheduling in the RAR.
The invention further enhances the design on the basis that the terminal acquires a plurality of PUSCH transmission resources for Msg3 so as to adapt to different transmission requirements of the terminal.
The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.
Fig. 1(a) is a flowchart of an embodiment of the method, fig. 1(b) is a schematic diagram of a second format of the embodiment of the method, fig. 1(c) is a schematic diagram of a third format of the embodiment of the method, fig. 1(d) is a schematic diagram of a format selection of the embodiment of the method, and fig. 1(e) is a schematic diagram of another format selection of the embodiment of the method, where the embodiment provides an uplink data transmission method in a random access process, and a terminal device that can be used for a four-step RACH includes the following steps 101 to 102:
step 101, obtaining configuration information to obtain transmission formats of N PUSCH transmission resources.
In step 101, the PUSCH transmission resource is a PUSCH transmission resource scheduled based on RAR (random access response), and the terminal acquires a transmission format (PUSCH transmission resource format) of the PUSCH transmission resource scheduled based on RAR for the terminal to determine a PUSCH transmission scheme scheduled based on RAR.
In step 101, N is the number of PUSCH transmission resources scheduled based on RAR, and the terminal acquires the configuration information, where the configuration information is, for example, common PRACH configuration information, where the configuration information includes a common Msg3 duplicate transmission aggregation parameter, that is, the duplicate transmission aggregation parameter (e.g., Msg3-aggregation factor), N is equal to the duplicate transmission aggregation parameter included in the configuration information, where N is an integer greater than or equal to 1, and indicates that the PUSCH transmission resources acquired based on RAR scheduling are N PUSCH transmission resources if the terminal transmits PUSCH scheduled based on RAR on a carrier or BWP corresponding to the configuration information.
Further, the N PUSCH transmission resources may be PUSCH transmissions of consecutive N slots, wherein each slot PUSCH transmission occupies the same symbol position; or N consecutive PUSCH transmissions, an unsigned interval of adjacent PUSCH transmissions.
In step 101, when the terminal acquires N (N is an integer greater than or equal to 1) PUSCH transmission resources based on RAR scheduling, the transmission format of the PUSCH transmission resources based on RAR scheduling determines the usage manner of the N PUSCH transmission resources according to the transmission format, such as multiple repeated transmission of one transmission block, or transmission of multiple different transmission blocks, or multiple repeated transmission of multiple different transmission blocks.
Further, the configured PUSCH transmission resource format may be at least one of the following first format to third format, the configured PUSCH transmission resource format is included in the configuration information, and the configured PUSCH transmission resource format may also be agreed by a protocol.
A first format: the N PUSCH transmission resources are N repeated transmissions of one Transport Block (TB).
The second format is: the N PUSCH transmission resources are P repetitions of the M0 transport blocks, and the transmission order is P repetitions of the mth PUSCH transmission resource followed by P repetitions of the M +1 PUSCH transmission resource.
Wherein, M0 is the number of configured transport blocks, M0>1, P is the number of configured retransmissions, P is the configuration value or P ═ ceil (N/M0), M is the transport block sequence number, and M ═ 1 to M0-1.
As shown in fig. 1(b), PUSCH _1 to PUSCH _ P, PUSCH _ P +1 to PUSCH _2P, … … are N PUSCH transmission resources,
PUSCH _ 1-PUSCH _ P are used for P times of repeated transmission of TB _ 1;
PUSCH _ P + 1-PUSCH _2P are used for P times of repeated transmission of TB _ 2;
……
PUSCH _ N-P + 1-PUSCH _ N are used for P times of repeated transmission of TB _ M0.
As shown in figure 1(c),
the third format is: the N PUSCH transmission resources are P times of repeated transmission of M0 transmission blocks, and the transmission sequence is P0 xM 0+1, P0 xM 0+2, … …, P0 xM 0+ M0, and M0 PUSCH transmission resources correspond to the transmission of the 1 st, 2 nd, … … th and M0 transmission blocks respectively;
wherein, M0 is the number of transport blocks, M0>1, P is the configured retransmission number, P is the configured value or P-ceil (N/M0), P0 is the retransmission number, and P0 is 0-P-1.
As shown in fig. 1(c), PUSCH _1 to PUSCH _ M0, PUSCH _ M0+1 to PUSCH _2M0, … … are N PUSCH transmission resources,
PUSCH _ 1-PUSCH _ M0 are used for transmission of TB _ 1-TB _ M0 and M0 TBs in total;
PUSCH _ M0+ 1-PUSCH _2M0 is used for transmission of TB _ 1-TB _ M0 and M0 TBs in total;
……
PUSCH (P-1) xM 0+ 1-PUSCH (P-1) xM 0+ M0 are used for transmission of TB _ 1-TB _ M0, for a total of M0 TBs.
In step 101, preferably, the N PUSCH transmission resources transmit Z transport blocks at most, where Z is a maximum number of transport blocks supported by the system configuration and is a parameter configured for a higher layer.
In step 102, the specific method for the terminal to select the actual PUSCH transmission resource format is as follows:
step 102A, the terminal determines R (R is less than or equal to N) PUSCH resources capable of initiating actual effective transmission according to the obtained N PUSCH resources and the relevant configuration.
And step 102B, the terminal obtains the required transport block number K according to the transmission requirement, obtains the current maximum supported transport block number S according to RSRP (Reference signal received power) measurement, obtains the actual transport block number M according to M ═ min (R, S, K), and selects one of the first format to the third format according to M and the effective PUSCH transmission resource.
And step 102B, the terminal determines the current maximum number S (S is less than or equal to Z) of the transmission blocks supported by the terminal according to the corresponding relationship between the RSRP value range and the maximum number of the transmission blocks supported by the terminal, the number of the transmission blocks required to be transmitted by the terminal according to the transmission requirement is K, the actual number M of the transmission blocks which can be actually transmitted is the minimum value of R, S, K, that is, M is min (R, S, K), and after the terminal determines M, the terminal selects the transmission format supporting M transmission blocks from the first format, the second format and the third format for transmission.
In step 102B, the current maximum number of supported transport blocks S is determined by the current RSRP measurement value and a preset correspondence between the maximum number of supported transport blocks and the RSRP measurement value.
Further, the preset corresponding relationship between the maximum number of supported transport blocks and the RSRP measurement value is shown in table 1 below, where the number of transport blocks that the terminal can transmit is related to the measurement RSRP, for example, a plurality of RSRP thresholds are set corresponding to the number of transport blocks that the terminal can transmit.
Table 1 supports the corresponding relationship between the maximum number of transport blocks and the RSRP measurement value
Table 1 above can be summarized as: the system configuration supports that the maximum transmission block number Z is larger than 1, and Z-1 RSRP thresholds are preset as a first threshold, a second threshold, … … and a Z-1 threshold.
When Z is greater than 2, if the RSRP measurement value is less than or equal to the first threshold value, the number of the supported maximum transmission blocks is 1; if the a-th threshold value < the RSRP measurement value is not more than the a + 1-th threshold value, the number of the supported maximum transmission blocks is a + 1; if the RSRP measurement value is greater than the a +1 th threshold, the number of the supported maximum transport blocks is Z; wherein a is the serial number of the threshold value, and a is more than or equal to 1 and less than or equal to Z-2.
When Z is 2, if the RSRP measurement value is not greater than a first threshold, the number of supported maximum transport blocks is 1, and if the RSRP measurement value > the first threshold, the number of supported maximum transport blocks is Z.
Therefore, by mapping the current RSRP measurement value to table 1, the current maximum number of transport blocks S can be known.
For example, suppose that the terminal acquires N-4 PUSCH resources, where the number R of PUSCH resources that can initiate actual effective transmission is 4, and the maximum transmission number Z of the configured N PUSCH resources is 2, when the number K of transport blocks that the terminal needs to transmit is 1, M is 1, and the terminal selects transport format 1 to perform R times of repeated transmission of one transport block. When the number K of transmission blocks that the terminal needs to transmit is 2, if the measured RSRP is less than or equal to the first threshold, that is, the maximum number S of currently supportable transmissions is 1, and M is 1, the terminal selects transport format 1 to perform R times of repeated transmissions of one transmission block; if the measured RSRP is greater than the first threshold, i.e. the maximum number of currently supportable transmissions, S ═ Z ═ 2, and M ═ min (R, S, K) ═ 2, the terminal selects transport format 2 or 3 for 2 times of repeated transmissions of 2 transport blocks, i.e. the transport format corresponding to the 4 PUSCH transport resources is { TB _1, TB _2}, or { TB _1, TB _2, TB _1, TB _2 }.
Note that when Z is 1, the maximum number of transport blocks S currently supported is 1 regardless of whether S is calculated by the current RSRP measurement value.
Further, in the Z-1 RSRP thresholds, different retransmission times of a transport block correspond to different values of the RSRP threshold. If it is assumed that Z transport blocks can be transmitted in the N allocated PUSCH resources at most, different values of { first threshold, second threshold, …, and (Z-1) th threshold } in table 1 are configured for different retransmission times of the transport blocks, as shown in table 2 below.
Table 2 retransmission times and RSRP threshold configuration table
In table 2 above, J is the retransmission number of one transport block, J ═ 1, and the configured Z-1 RSRP thresholds are: { first J1 threshold, second J1 threshold, …, and (Z-1) th J1 threshold }, J ═ 2, Z-1 RSRP thresholds configured are: { first J2 threshold, second J2 threshold, …, and (Z-1) J2 threshold } … ….
In step 102, if M is 1, the actual PUSCH transmission resource format is the first format; if M >1, when the configured valid PUSCH transmission resource formats are the second and third formats, and the configured second and third formats both satisfy the transmission conditions of M transport blocks, the actual PUSCH transmission resource format is the second format or the third format.
For example, assume that a terminal acquires N-4 PUSCH resources, where the number R of PUSCH resources that can initiate actual effective transmission is 4, the maximum transmission number Z of N configured PUSCH resources is 2, and the number K of transmission blocks that the terminal needs to transmit is 1. With the above condition M being 1, the terminal selects the first format for R repeated transmissions of one transport block.
For another example, as shown in fig. 1(d), the terminal acquires N ═ 4 PUSCH resources, where the number R of PUSCH resources that can initiate actual effective transmission is 4, and the number K of transmission blocks that the terminal needs to transmit is 2:
if the current RSRP measurement value is less than or equal to a first J4 threshold corresponding to the retransmission time number J-R-4, that is, the current maximum number S of supported transmissions is 1, the terminal selects the first format to perform R times of repeated transmissions of one transport block according to the above condition M-1;
if the current RSRP measurement value is greater than the first J4 threshold corresponding to the retransmission time J ═ R ═ 4, that is, the current maximum supported transmission number S ═ Z ═ 2, and M ═ min (R, S, K) ═ 2, the terminal selects the second format or the third format to perform 2-time repeated transmission of 2 transport blocks, that is, the transport formats corresponding to the 4 PUSCH transport resources are { TB _1, TB _2} or { TB _1, TB _2, TB _1, TB _2 }.
For another example, as shown in fig. 1(e), it is assumed that the terminal acquires N ═ 4 PUSCH resources, where the number R of PUSCH resources that can initiate actual effective transmission is 2, and the maximum transmission number Z of the configured N PUSCH resources is 2, when the number K of transport blocks that the terminal needs to transmit is 2:
if the current RSRP measurement value is less than or equal to a first J2 threshold corresponding to the retransmission times J-R-2, that is, the current maximum number of supported transmissions S-1, and M-1, the terminal selects the first format to perform R-2 times of repeated transmission of one transport block;
if the measured RSRP is greater than the first J2 threshold corresponding to the retransmission time J ═ R ═ 2, that is, the maximum number of currently supportable transmissions S ═ Z ═ 2, and M ═ min (R, S, K) ═ 2, the terminal selects the third format to perform 1 transmission of 2 transport blocks, which is { TB _1, TB _2 }.
In the invention, the base station carries out blind detection according to the PUSCH transmission format which can be supported.
The invention provides an uplink data transmission method in random access response, which flexibly supports different PUSCH transmission quantity requirements and improves the transmission reliability of a PUSCH in a mode of configuring a transmission format for uplink data transmission.
Fig. 2 is a flowchart of an embodiment of the method of the present application for a terminal device.
The method in any embodiment of the first aspect of the present application is applied to a terminal device, and includes the following steps 201-202:
In step 201, the terminal receives the configuration information, where the configuration information may be configured by a higher layer according to a protocol agreement or sent by a network device.
Step 202, determining an actual PUSCH transmission resource format from the configured PUSCH transmission resource formats, and sending data on the effective PUSCH transmission resource.
It should be noted that, in the method of the present application, for the four-step RACH, high reliability transmission is achieved by determining a PUSCH transmission resource format, and other four-step RACH access procedures (such as 5 communications, etc.) are the same as those in the prior art.
Fig. 3 is a flowchart of an embodiment of a method of the present application for a network device.
The method of any one embodiment of the first aspect of the present application, for a network device, includes the following steps 301-302.
In step 301, the configuration information is configured by a higher layer, the configuration information received by the network device and the terminal device may both be configured by the higher layer according to a protocol agreement, or the configuration information of the network device may be configured by the higher layer, and the configuration information of the terminal device is sent by the network device.
In step 302, the terminal adopts a 5-time communication method of a four-step random access process, accesses the network device, and the 5-time communication method is the prior art and is not described herein.
Fig. 4 is a flowchart of another embodiment of the method of the present application for a network device.
The method of any one embodiment of the first aspect of the present application, for a network device, includes the following steps 401-402.
In step 401, the network device sends configuration information to the terminal device.
Step 402 is the same as step 302.
Fig. 5 is a schematic diagram of an embodiment of a terminal device.
The present application further provides a terminal device, which uses the method of any one of the embodiments of the present application, and is configured to: msg3 transmission for 4-step RACH.
In order to implement the foregoing technical solution, the terminal device 500 provided in the present application includes: a terminal receiving module 501, a terminal determining module 502 and a terminal sending module 503.
And the terminal receiving module is used for receiving the configuration information to obtain N PUSCH transmission resources and formats thereof.
The terminal determining module is configured to obtain an actual number M of transmission blocks according to the number R of effective PUSCH transmission resources, the number K of required transmission blocks, and the number S of currently supported maximum transmission blocks, and determine an actual PUSCH transmission resource format from the configured PUSCH transmission resource formats:
M＝min(R，S，K)
and N is an integer greater than or equal to 1, N is equal to the repeated transmission aggregation parameter contained in the configuration information, R is less than or equal to N, and the number of the PUSCH transmission resources is the actual effective PUSCH transmission resource number.
And the terminal sending module is used for sending data on the effective PUSCH transmission resource.
The specific method for implementing the functions of the terminal configuration module, the terminal determination module, and the terminal sending module is as described in the method embodiments of the present application, and is not described herein again.
The terminal equipment can be mobile terminal equipment.
Fig. 6 is a schematic diagram of an embodiment of a network device.
An embodiment of the present application further provides a network device, where, using the method according to any one of the embodiments of the present application, the network device is configured to: 4-step RACH base station.
In order to implement the foregoing technical solution, a network device 600 provided in the present application includes: a network receiving module 601, a network determining module 602, and a network sending module 603.
If the configuration information is configured by a higher layer, the network receiving module is configured to obtain the configuration information configured by the higher layer and is further configured to receive data on an effective PUSCH transmission resource; and if the configuration information is set by the network equipment and then is sent to the terminal equipment, the network sending equipment is used for sending the configuration information.
The network receiving module is configured to receive data on an effective PUSCH transmission resource.
The specific method for implementing the functions of the network sending module, the network receiving module, and the network determining module is described in the embodiments of the methods of the present application, and is not described herein again.
Fig. 7 is a schematic structural diagram of a network device according to another embodiment of the present invention. As shown, network device 700 includes a processor 702, a wireless interface 703, and a memory 701. Wherein the wireless interface may be a plurality of components, i.e. including a transmitter and a receiver, providing means for communicating with various other apparatus over a transmission medium. The wireless interface implements a communication function with the terminal device, and processes wireless signals through the receiving and transmitting devices, and data carried by the signals are communicated with the memory or the processor through the internal bus structure. The memory 701 contains a computer program that executes any of the embodiments of the present application, running or otherwise altered on the processor 702. When the memory, processor, wireless interface circuit are connected through a bus system. The bus system includes a data bus, a power bus, a control bus, and a status signal bus, which are not described herein.
Fig. 8 is a block diagram of a terminal device of another embodiment of the present invention. The terminal device 800 comprises at least one processor 801, a memory 802, a user interface 804 and at least one network interface 803. The various components in the terminal device 800 are coupled together by a bus system. A bus system is used to enable connection communication between these components. The bus system includes a data bus, a power bus, a control bus, and a status signal bus.
The user interface 804 may include a display, a keyboard, or a pointing device, such as a mouse, a trackball, a touch pad, or a touch screen, among others.
The memory 802 stores executable modules or data structures. The memory may have stored therein an operating system and an application program. The operating system includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, and is used for implementing various basic services and processing hardware-based tasks. The application programs include various application programs such as a media player, a browser, and the like for implementing various application services.
In an embodiment of the present invention, the memory 802 contains a computer program for executing any of the embodiments of the present application, and the computer program runs or changes on the processor 801.
The memory 802 contains a computer readable storage medium, and the processor 801 reads the information in the memory 802, and combines the hardware to complete the steps of the above method. In particular, the computer readable storage medium has stored thereon a computer program which, when being executed by the processor 801, carries out the steps of the method embodiments as described in any of the above embodiments.
The processor 801 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the method of the present application may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 801. The processor 801 may be a general purpose processor, digital signal processor, application specific integrated circuit, off-the-shelf programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
It should be noted that the terms "first" and "second" in the present application are used to distinguish a plurality of objects having the same name, and have no other special meaning unless otherwise specified.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (16)
1. An uplink data transmission method in a random access process is used for a four-step RACH, and is characterized by comprising the following steps:
acquiring configuration information to obtain N PUSCH transmission resources and formats thereof;
obtaining an actual transmission block number M according to the number R of the effective PUSCH transmission resources, the number K of the required transmission blocks and the number S of the currently supported maximum transmission blocks, and determining an actual PUSCH transmission resource format from the configured PUSCH transmission resource formats, wherein M is min (R, S, K);
the number S of the current maximum transmission blocks is determined by the corresponding relation between the current RSRP measurement value and the preset number of the maximum transmission blocks supported and the RSRP measurement value;
the PUSCH transmission resource format comprises at least one of: multiple repeated transmissions of one transport block, multiple repeated transmissions of multiple different transport blocks;
and N is an integer greater than or equal to 1, N is equal to the repeated transmission aggregation parameter contained in the configuration information, R is less than or equal to N, and the number of the PUSCH transmission resources is the actual effective PUSCH transmission resource number.
2. The uplink data transmission method in the random access procedure according to claim 1, wherein the configured PUSCH transmission resource format is at least one of:
a first format: the N PUSCH transmission resources are N times of repeated transmission of one transmission block;
the second format is: the N PUSCH transmission resources are P times of repeated transmission of M0 transmission blocks, and the transmission order is P times of repeated transmission of the mth PUSCH transmission resource followed by P times of repeated transmission of the M +1 th PUSCH transmission resource;
the third format is: the N PUSCH transmission resources are P times of repeated transmission of M0 transmission blocks, and the transmission sequence is P0 xM 0+1, P0 xM 0+2, … …, P0 xM 0+ M0, and M0 PUSCH transmission resources correspond to the transmission of the 1 st, 2 nd, … … th and M0 transmission blocks respectively;
wherein, M0 is the number of transport blocks, M0>1, P is the configured retransmission times, P is the configured value or P-ceil (N/M0), M is the transport block sequence number, M-1 to M0-1, P0 is the retransmission sequence number, and P0-0 to P-1.
3. The uplink data transmission method in the random access procedure according to claim 1, wherein the current maximum number of supported transport blocks S is determined by a current RSRP measurement value and a preset correspondence between the maximum number of supported transport blocks and the RSRP measurement value.
4. The method for uplink data transmission in a random access procedure according to claim 1, wherein the N PUSCH transmission resources are PUSCH transmission resources of consecutive N slots and PUSCH transmission of each slot occupies the same symbol position, or N consecutive PUSCH transmission with no symbol interval between adjacent PUSCH transmissions.
5. The uplink data transmission method in the random access procedure according to claim 1, wherein the N PUSCH transmission resources transmit Z transmission blocks at most, and Z is a maximum number of transmission blocks supported by a system configuration.
6. The uplink data transmission method in a random access procedure according to claim 2,
if M is 1, the actual PUSCH transmission resource format is the first format;
if M >1, when the configured valid PUSCH transmission resource formats are the second and third formats, and the configured second and third formats both satisfy the transmission conditions of M transport blocks, the actual PUSCH transmission resource format is the second format or the third format.
7. The uplink data transmission method in the random access process of claim 3, wherein when the system configuration supports the maximum number of transport blocks Z greater than 1, the preset corresponding relationship between the maximum number of transport blocks supported and the RSRP measurement value is:
presetting Z-1 RSRP thresholds which are respectively a first threshold, a second threshold, … … and a Z-1 threshold;
when Z >2, the compound is a compound represented by formula (I),
if the RSRP measurement value is not greater than the first threshold value, the number of the supported maximum transmission blocks is 1;
if the a-th threshold value < the RSRP measurement value is not more than the a + 1-th threshold value, the number of the supported maximum transmission blocks is a + 1;
if the RSRP measurement value is greater than the a +1 th threshold, the number of the supported maximum transport blocks is Z;
wherein a is a threshold serial number, and a is more than or equal to 1 and less than or equal to Z-2;
when the Z is equal to 2, the crystal grain size,
if the RSRP measurement value is not greater than a first threshold, the number of supported maximum transport blocks is 1, and if the RSRP measurement value > the first threshold, the number of supported maximum transport blocks is Z.
8. The uplink data transmission method in the random access process of claim 7, wherein in the Z-1 RSRP thresholds, different retransmission times of a transport block correspond to different RSRP threshold values.
9. The method according to any one of claims 1 to 8, applied to a terminal device, comprising the steps of:
receiving the configuration information;
and determining an actual PUSCH transmission resource format from the configured PUSCH transmission resource formats, and sending data on the effective PUSCH transmission resource.
10. The method according to any of claims 1 to 8, for a network device, comprising the steps of:
receiving the configuration information of a high-level configuration;
data is received on the active PUSCH transmission resources.
11. The method according to any of claims 1 to 8, for a network device, comprising the steps of:
sending the configuration information to terminal equipment;
data is received on the active PUSCH transmission resources.
12. An uplink data transmission terminal device in a random access process, configured to implement the method according to any one of claims 1 to 8, comprising:
the terminal receiving module is used for receiving the configuration information to obtain N PUSCH transmission resources and formats thereof;
the terminal determining module is used for obtaining the actual number M of the transmission blocks according to the number R of the effective PUSCH transmission resources, the number K of the required transmission blocks and the number S of the currently supported maximum transmission blocks, and determining the actual PUSCH transmission resource format from the configured PUSCH transmission resource formats:
M＝min(R，S，K)
wherein, N is an integer greater than or equal to 1 based on the number of PUSCH transmission resources scheduled by RAR, N is equal to the repeat transmission aggregation parameter included in the configuration information, R is less than or equal to N, and is the actual effective number of PUSCH transmission resources;
and the terminal sending module is used for sending data on the effective PUSCH transmission resources.
13. An uplink data transmission network device in a random access process, configured to implement the method according to any one of claims 1 to 8, comprising:
a network determination module for determining the configuration information;
a network receiving module for receiving data on the effective PUSCH transmission resource;
and the network sending module is used for sending the configuration information.
14. An uplink data transmission device in a random access process, comprising: memory, processor and computer program stored on the memory and executable on the processor, which computer program when executed by the processor implements the steps of the method according to any one of claims 1 to 11.
15. A computer-readable medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 11.
16. A mobile communication system comprising the apparatus of claim 12 and/or the apparatus of claim 13.
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