CN109617656B - Terminal, base station and HARQ (hybrid automatic repeat request) process identification ID configuration method - Google Patents
Terminal, base station and HARQ (hybrid automatic repeat request) process identification ID configuration method Download PDFInfo
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- 238000004590 computer program Methods 0.000 claims description 10
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
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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
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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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Abstract
The invention relates to the technical field of wireless communication, and provides a terminal, a base station and a method for configuring a hybrid automatic repeat request (HARQ) process Identifier (ID), wherein the method comprises the following steps: transmitting a random access preamble; receiving a random access response RAR carried in a physical downlink shared channel PDSCH scheduled by a base station through a physical downlink control channel PDCCH; and determining an HARQ process processID according to the PDCCH or the PDSCH. In the invention, the HARQ process ID is determined by the PDCCH or the PDSCH, thereby avoiding confusion in the retransmission process of uplink data.
Description
Technical Field
The present invention relates to the field of wireless communications technologies, and in particular, to a method for configuring a terminal, a base station, and a hybrid automatic repeat request HARQ process ID.
Background
With the rapid development of the information industry, particularly the growing demand from the mobile internet and internet of things (IoT, internet of things), the future mobile communication technology is challenged unprecedented. As per the international telecommunications union ITU report ITU-R M [ imt. Beyond 2020.Traffic ], it is expected that in 2020, mobile traffic (relative to the 4G age in 2010) will grow approximately 1000 times, the number of user terminal device connections will also exceed 170 billions, and the number of connected devices will be even more dramatic as the vast number of IoT devices gradually penetrate into the mobile communication network. To address this unprecedented challenge, the communications industry and academia have developed a wide range of fifth generation mobile communication technology research (5G), oriented in the 2020 s. The framework and overall goals of future 5G have been discussed in ITU report ITU-R M [ imt.vision ], where the requirements expectations, application scenarios and important performance metrics of 5G are specified. Aiming at the new demand in 5G, the ITU report ITU-R M [ IMT. FUTURE TECHNOLOGY TRENDS ] provides information related to the technical trend aiming at 5G, and aims to solve the remarkable problems of remarkable improvement of system throughput, consistency of user experience, expansibility to support IoT, time delay, energy efficiency, cost, network flexibility, support of emerging services, flexible spectrum utilization and the like.
The performance of random access directly affects the user experience. In conventional wireless communication systems, such as LTE and LTE-Advanced, a random access procedure is applied to various scenarios, such as initial link establishment, cell handover, uplink re-establishment, RRC connection reestablishment, etc., and is divided into Contention-based random access (content-based Random Access) and non-Contention-based random access (content-free Random Access) according to whether a user terminal monopolizes a random access preamble sequence resource. In the random access based on competition, each user terminal selects a random access preamble sequence from the same random access preamble sequence resource in the process of attempting to establish uplink, and a plurality of user terminals may select the same random access preamble sequence to be sent to a base station, so that a conflict resolution mechanism is an important research direction in random access, and is a key index for influencing random access performance, and how to reduce the conflict probability and how to quickly resolve the conflict.
The contention-based random access procedure in LTE-a is divided into four steps as shown in fig. 1. In the first step, the user terminal randomly selects a random access preamble sequence from a random access preamble sequence resource pool and sends the random access preamble sequence to the base station. The base station carries out correlation detection on the received signals so as to identify a random access preamble sequence sent by the user terminal; in the second step, the base station sends a random access response (Random Access Response, RAR) to the user terminal, comprising a random access preamble sequence identifier, a timing advance instruction determined according to the time delay estimation between the user terminal and the base station, a Cell radio network temporary identifier (Cell-Radio Network Temporary Identifier, C-RNTI), and a time-frequency resource allocated for the next uplink transmission of the user terminal; in the third step, the user terminal sends a third message (Msg 3) to the base station according to the information in the RAR, wherein the Msg3 contains information such as a user terminal identifier and an RRC (Radio Resource Control ) link request, and the user terminal identifier is unique to the user terminal and is used for resolving the conflict; in the fourth step, the base station transmits a conflict resolution identifier to the user terminal, including the user terminal identifier of the user winning in the conflict resolution. After detecting the self-contained identification, the user terminal upgrades the temporary C-RNTI into the C-RNTI, and sends an ACK (Acknowledgement character) signal to the base station, completes the random access process, and waits for the scheduling of the base station. Otherwise, the user terminal starts a new random access procedure after a delay.
For non-contention based random access procedures, a random access preamble sequence may be allocated to a user terminal since the base station knows the user terminal identity. Therefore, when the user terminal transmits the random access preamble sequence, the user terminal does not need to randomly select the random access preamble sequence, and the allocated random access preamble sequence can be used. After detecting the allocated random access preamble sequence, the base station sends corresponding random access response including timing advance and uplink resource allocation information. After receiving the random access response, the user terminal considers that the uplink synchronization is completed, and waits for further scheduling of the base station. Thus, the non-contention based random access procedure only comprises two steps: step one, a random access preamble sequence is sent; and step two, sending a random access response.
The random access procedure in LTE is applicable to the following scenarios:
Initial access under rrc_idle;
2. Reestablishing the RRC connection;
3. cell switching;
The RRC connection state downlink data arrives and requests a random access procedure (when the uplink is asynchronous);
the RRC connection state downlink and uplink data arrives and requests a random access process (when the uplink is in an asynchronous state or the resource of a PUCCH (Physical Uplink Control CHannel, physical uplink control channel) is not allocated to the scheduling request);
6. And (5) positioning.
In LTE, there is no field of HARQ (Hybrid Automatic Repeat Request ) process ID in RAR, so that the HARQ process ID of PUSCH (Physical Uplink SHARED CHANNEL ) scheduled by RAR defaults to 0, for contention-based random access process, since there is no Uplink data transmission before the random access process, the HARQ process ID of PUSCH scheduled by RAR defaults to 0, but for non-contention-based random access process, there may be Uplink data transmission before the random access process, and the HARQ process ID of possible Uplink data is also 0, which may cause confusion of HARQ process ID, and the subsequent PUSCH transmission uses HARQ process ID of 0, resulting in confusion of whether there is retransmission of PUSCH data before RAR or retransmission of RAR-scheduled data, causing confusion of retransmission of Uplink data.
Disclosure of Invention
The invention provides a terminal, a base station and a method for configuring an HARQ process identifier ID so as to avoid confusion in the retransmission process of uplink data.
The invention provides a method for configuring a hybrid automatic repeat request (HARQ) process Identifier (ID), which comprises the following steps:
Transmitting a random access preamble;
Receiving a random access response RAR carried in a physical downlink shared channel PDSCH scheduled by a base station through a physical downlink control channel PDCCH;
and determining an HARQ process processID according to the PDCCH or the PDSCH.
Preferably, the determining the HARQ process processID according to the PDSCH includes:
Reading an MAC header message carried in the PDSCH scheduled by the PDCCH, and determining RAR format information according to the MAC header message;
And determining the HARQ process ID according to the determined RAR format information.
Preferably, the reading the MAC header message carried in the PDSCH scheduled by the PDCCH, and determining the RAR format information according to the MAC header message specifically includes:
reading each MAC sub-header message in the MAC sub-header message in sequence until the Random Access Preamble Identifier (RAPID) carried in a certain MAC sub-header message is matched with the sent random access preamble, and stopping reading;
And acquiring RAR format information in each read MAC sub-header message.
Preferably, the reading the MAC header message carried in the PDSCH scheduled by the PDCCH, and determining the RAR format information according to the MAC header message specifically includes:
reading a value of a Random Access Preamble Identifier (RAPID) carried in the MAC header message;
and determining the RAR format information in the MAC header message according to the value of the RAPID.
Preferably, the determining the HARQ process ID according to the PDSCH includes:
and extracting the HARQ process ID from the RAR format information of the RAR carried in the PDSCH scheduled by the PDCCH.
Preferably, determining the HARQ process processID according to the PDCCH includes:
acquiring indication information carried by a PDCCH scrambled by a random access radio network temporary identifier RA-RNTI;
and determining the HARQ process ID according to the indication information.
Preferably, the content included in the indication information carried by the PDCCH scrambled by the random access radio network temporary identifier RA-RNTI is at least one of the following:
an indication value of RAR format information;
the number of RARs containing HARQ process ID;
if the indicated value of the RAR format information is a first preset value, the RAR contains an HARQ process ID; if the indicated value of the RAR format information is a second preset value, the RAR does not contain the HARQ process ID.
Preferably, determining the HARQ process processID according to the PDCCH includes:
acquiring that the PDCCH scrambled by the cell radio network temporary identifier C-RNTI carries an HARQ process ID; or alternatively, the first and second heat exchangers may be,
The PDSCH which acquires the PDCCH scheduling scrambled by the cell radio network temporary identifier C-RNTI carries the HARQ process ID.
The invention also provides a method for configuring the HARQ process identifier ID, which comprises the following steps:
Receiving a random access preamble sent by a terminal;
And scheduling a random access response RAR carried in a physical downlink shared channel PDSCH through a physical downlink control channel PDCCH, so that the terminal determines an HARQ process ID according to the PDCCH or the PDSCH.
Preferably, the method further comprises:
configuring an HARQ process ID in the PDSCH; or (b)
And configuring an HARQ process ID in the PDCCH.
Preferably, the method for configuring the HARQ process ID in the PDSCH includes any one of the following:
Configuring a value of a Random Access Preamble Identifier (RAPID) in an MAC header message carried in a Physical Downlink Shared Channel (PDSCH) scheduled by the PDCCH, so that the terminal determines RAR format information according to the value of the RAPID;
configuring RAR format information in an MAC header message carried in the PDSCH scheduled by the PDCCH, so that the terminal determines an HARQ process ID according to the RAR format information;
And configuring an HARQ process ID in each RAR format information of RAR carried in the PDSCH scheduled by the PDCCH.
Preferably, the method for configuring the HARQ process ID in the PDCCH includes any one of the following:
Carrying indication information in a PDCCH scrambled by a random access radio network temporary identifier RA-RNTI, and determining the HARQ process ID according to the indication information;
Carrying an HARQ process ID in a PDCCH scrambled by a cell radio network temporary identifier C-RNTI;
The HARQ process ID is carried in PDSCH scheduled by PDCCH scrambled by the cell radio network temporary identifier C-RNTI.
The invention also provides a terminal, comprising:
a transmitting unit configured to transmit a random access preamble;
A receiving unit, configured to receive a random access response RAR carried in a physical downlink shared channel PDSCH scheduled by the base station through a physical downlink control channel PDCCH;
And the processing unit is used for determining a hybrid automatic repeat request (HARQ) process Identification (ID) according to the PDCCH or the PDSCH.
The invention also provides a base station, comprising:
a receiving unit, configured to receive a random access preamble sent by a terminal;
And the sending unit is used for scheduling the random access response RAR carried in the physical downlink shared channel PDSCH through the physical downlink control channel PDCCH so that the terminal determines the hybrid automatic repeat request HARQ process identification ID according to the PDCCH or the PDSCH.
The invention also provides a terminal device comprising a memory and a first processor, wherein the memory is used for storing a computer program, and the computer program realizes the steps of the HARQ process ID configuration method when being executed by the first processor.
A base station device comprising a memory and a second processor, said memory being arranged to store a computer program which, when executed by the second processor, implements the steps of the HARQ process ID configuration method described above.
In the invention, the HARQ process identification ID is determined by PDCCH or PDSCH, thus avoiding confusion in the retransmission process of uplink data.
Drawings
Fig. 1 is a schematic diagram of a conventional contention-based random access procedure in the prior art;
Fig. 2 is a flow chart of a method for configuring HARQ process ID of a terminal side according to the present invention;
fig. 3 is a flow chart of a method for configuring HARQ process ID at a base station side according to the present invention;
Fig. 4 is a first exemplary diagram of a MAC header in a random access response incorporating an RAR format indication;
fig. 5 is a second exemplary diagram of a MAC header in a random access response incorporating an RAR format indication;
Fig. 6 is a third exemplary diagram of a MAC header in a random access response incorporating an RAR format indication;
Fig. 7 is a schematic structural view of a terminal provided by the present invention;
Fig. 8 is a schematic structural diagram of a base station according to the present invention.
Detailed Description
The invention provides a terminal, a base station and a method for configuring a hybrid automatic repeat request (HARQ) process Identifier (ID), and the detailed description of the specific embodiments of the invention is given below with reference to the accompanying drawings.
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. The term "and/or" as used herein includes all or any element and all combination of one or more of the associated listed items.
It will be understood by those skilled in the art that all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs unless defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
In the random access procedure, the HARQ process ID of the PUSCH scheduled by the current RAR without the HARQ process ID, for example, the HARQ process ID of the PDCCH (Physical Downlink Control Channel ) is defaulted to 0, and for the contention-based random access procedure, there is no uplink data transmission before the random access procedure, so that the HARQ process ID of the PUSCH scheduled by the PDCCH is defaulted to 0, but for the non-contention-based random access procedure, there may be uplink data transmission before the random access procedure, and the HARQ process ID of the uplink data may be 0, which may cause confusion of the HARQ process ID, and the subsequent PUSCH transmission uses the HARQ process ID of 0, which is not known as whether the PUSCH data retransmission before the RAR or the RAR schedule data retransmission causes confusion of the uplink data retransmission.
Based on this, the present invention provides a HARQ process ID configuration method, as shown in fig. 2, applied to a terminal side, including the following steps:
step 201, a random access preamble is transmitted.
In step 202, a random access response RAR carried in a PDSCH (Physical Downlink SHARED CHANNEL ) scheduled by a base station through a PDCCH is received.
In step 203, an HARQ process processID is determined according to the PDCCH or PDSCH.
The process of determining the HARQ process processID according to the PDSCH may include the following several ways:
(1) Reading an MAC header message carried in the PDSCH scheduled by the PDCCH, and determining RAR format information according to the MAC header message; and determining the HARQ process ID according to the determined RAR format information.
Further, the reading the MAC header message carried in the PDSCH scheduled by the PDCCH, and determining RAR format information according to the MAC header message specifically includes two processes:
1) Reading each MAC sub-header message in the MAC sub-header message in turn until the RAPID (Random AccessPreamble Identification, random access preamble identifier) carried in a certain MAC sub-header message is matched with the sent random access preamble, and stopping reading;
And acquiring RAR format information in each read MAC sub-header message.
2) Reading a value of a Random Access Preamble Identifier (RAPID) carried in the MAC header message;
and determining the RAR format information in the MAC header message according to the value of the RAPID.
(2) And extracting the HARQ process ID from the RAR format information of the RAR carried in the PDSCH scheduled by the PDCCH.
(3) Acquiring indication information carried by a PDCCH scrambled by an RA-RNTI (Random Access-Radio Network Temporary Identifier, random Access radio network temporary identifier); and determining the HARQ process ID according to the indication information.
The content contained in the indication information carried by the PDCCH scrambled by the RA-RNTI is at least one of the following:
an indication value of RAR format information;
the number of RARs containing HARQ process ID;
if the indicated value of the RAR format information is a first preset value, the RAR contains an HARQ process ID; if the indicated value of the RAR format information is a second preset value, the RAR does not contain the HARQ process ID.
(4) The obtained PDCCH scrambled by the C-RNTI carries the HARQ process ID.
(5) The PDSCH which acquires the PDCCH scheduling scrambled by the C-RNTI carries the HARQ process ID.
The above-mentioned RAR format information involved in the process of determining the HARQ process ID according to the PDSCH includes:
the RAR that does not contain the HARQ process ID is M bits;
The RAR containing the HARQ process ID is an (m+n) bit;
wherein M, N are natural numbers not less than 1.
The invention also provides a method for configuring the HARQ process ID, which is applied to the base station side as shown in figure 3 and comprises the following steps:
Step 301, receiving a random access preamble sent by a terminal.
In step 302, the random access response RAR carried in the PDSCH is scheduled through the PDCCH.
Through the above transmission process, the terminal determines the HARQ process ID according to the PDCCH or PDSCH.
The configuration modes for the HARQ process ID comprise the following two modes:
(1) Configuring an HARQ process ID in the PDSCH;
(2) And configuring an HARQ process ID in the PDCCH.
As for (1), it specifically includes any one of the following:
1) Configuring a value of a Random Access Preamble Identifier (RAPID) in an MAC header message carried in a Physical Downlink Shared Channel (PDSCH) scheduled by the PDCCH, so that the terminal determines RAR format information according to the value of the RAPID;
2) Configuring RAR format information in an MAC header message carried in the PDSCH scheduled by the PDCCH, so that the terminal determines an HARQ process ID according to the RAR format information;
3) And configuring an HARQ process ID in each RAR format information of RAR carried in the PDSCH scheduled by the PDCCH.
As for (2), it specifically includes any one of the following:
1) Carrying indication information in the PDCCH scrambled by the RA-RNTI, and determining the HARQ process ID according to the indication information;
2) Carrying an HARQ process ID in the PDCCH scrambled by the C-RNTI;
3) The HARQ process ID is carried in PDSCH scheduled by the C-RNTI scrambled PDCCH.
Based on the HARQ process ID configuration method applied to the terminal and the base station side, an embodiment is described below.
The novel data transmission mode provided by the invention enables the base station to indicate the HARQ process ID of the PUSCH data transmission in the non-contention-based random access process. The HARQ process ID is sent to the user terminal by means of C-RNTI or RA-RNTI by using PDCCH to directly schedule resources for non-contention based random process and simultaneously indicate the HARQ process ID or change the MAC header structure of PDSCH.
The method specifically comprises the following five steps:
determining which RARs contain HARQ process IDs by an indication in the MAC header;
HARQ process ID is contained in all RARs;
distinguishing whether the HARQ process ID is contained or not by randomly accessing the resource grouping;
Indicating whether the HARQ process ID is contained in the PDCCH;
The HARQ process ID is only included when the UL grant is scheduled by the C-RNTI-scrambled PDCCH.
Example 1
In this embodiment, the RAR format may be determined by the following five methods.
The method comprises the following steps:
which RARs contain the HARQ process ID is determined by an indication in the MAC header.
Since the PUSCH scheduled with RAR needs to indicate the HARQ process ID in the RAR in the non-contention based random access procedure, and the PUSCH scheduled with RAR does not need to indicate the HARQ process ID in the RAR in the contention based random access procedure, while the RAR in one PDSCH is the non-contention based random access procedure, and is the contention based random access procedure, it is indicated which RARs contain the HARQ process ID, and which RARs do not contain the HARQ process ID; where the RAR that does not contain the HARQ process ID is 20 bits and the RAR that contains the HARQ process ID is (20+n) bits, where N is determined by the protocol or by a higher layer signaling configuration, e.g., N equals 4.
In the random access procedure, the RAR format of the ue after the random access preamble transmission is determined as follows:
If the ue searches for the corresponding downlink control channel information through the RA-RNTI, the downlink control channel information indicates the location of the downlink shared channel where the specific random access response message is located, and because the time unit where the downlink control channel is located may be different from the time unit where the corresponding downlink shared channel is located, the system may have the following two configurations:
In this embodiment, notification is performed by adding an indication of the RAR format to the MAC header (MAC HEADER) of the random access response. As shown in fig. 4, the MAC header includes a plurality of MAC subheads (subheader), which are shown as follows:
E is 1bit, e.g., e=0, indicating that the MAC sub-header is followed by a random access response or padding information (padding); e=1, indicating that the MAC sub-header includes at least one MAC sub-header carrying a Random Access Preamble Identification (RAPID) or in RAR format;
t is 1bit, and the criterion for distinguishing is that T in the first MAC sub-header indicates a back-off indication (i.e., t=0) or a RAR format (i.e., t=1), and T in the other MAC sub-header indicates a RAR format (i.e., t=0) or a random access preamble identification (i.e., t=1);
r is a reserved bit of one bit;
BI is a 4-bit backoff indication;
the RAR format, which indicates the number of RARs with the foremost number of bits of 20+n, is indicated as 000011 in fig. 5, and the number of RARs with the HARQ process ID is 3, that is, the number of RARs with the number of bits of 20+n is 3.
RAPID is a 6-bit random access preamble identification.
In this embodiment, there are three format settings of the MAC subheader:
format one, structure E/T/R/R/BI;
Format two, the structure is E/T/RAR format;
Format three, structure E/T/RAPID.
Wherein format one may appear in the MAC header;
I.e., the first MAC subheader is in format one, as shown in fig. 5.
The flow of the message of the MAC header read by the user terminal is as follows:
Step 1: reading the first two bits of the first MAC subheader as 10, i.e., e=1, t=0, indicating that there is at least one MAC subheader in RAPID or RAR format later and the back-off indication is included in the MAC subheader; reading a 4-bit rollback indication;
Step 2: reading the first two bits of the second MAC subheader to be 10, i.e., e=1, t=0, indicating that there is at least one RAPID later and that the MAC subheader contains a RAR format; reading a 6-bit RAR format;
Step 3: sequentially reading each subsequent MAC sub-header, and when the user terminal searches the random access preamble identifier matched with the random access preamble transmitted by the user terminal; the RAR is read in the format of the RAR.
Format one may not appear in the MAC header; i.e., the first MAC subheader is format two, as shown in fig. 6.
The flow of the message of the MAC header read by the user terminal is as follows:
Step 1: reading the first two bits of the first MAC subheader to be 11, i.e., e=1, t=1, indicating that there is at least one RAPID later and that the present MAC subheader contains a RAR format; reading a 6-bit RAR format;
Step 2: sequentially reading each subsequent MAC sub-header, and when the user terminal searches the random access preamble identifier matched with the random access preamble transmitted by the user terminal; the RAR is read in the format of the RAR. Wherein if the UE's RAR is indicated to belong to 20+n bits, the UE interprets the RAR according to 20+n bits, and if the UE's RAR is indicated to belong to 20 bits, the UE interprets the RAR according to 20 bits.
As in the present embodiment, the format of the RAR in the MAC sub-header is 6 bits, and may indicate at most 64 RAR formats, or may not be M bits, and the specific number of bits is preset by the protocol, or is configured by higher layer signaling.
For RAR containing HARQ process ID, the HARQ process ID of PUSCH scheduled by him is the HARQ process ID value in RAR, and for RAR not containing HARQ process ID, the HARQ process ID value of PUSCH scheduled by him is 0.
The second method is as follows:
all RARs contain HARQ process IDs.
The HARQ process ID may be directly extracted from each of the RAR format information in the RAR.
For non-contention based random access procedures, the HARQ process ID in the RAR indicates the HARQ process ID, whereas in contention based random access procedures, the HARQ process ID in the RAR is used as a reserved field, the RAR is a (20+n) bit, where N is determined by the protocol or by a higher layer signaling configuration, e.g. N equals 4.
And a third method:
Grouping RAIDs in the MAC header, wherein one group of RARs corresponding to the RAIDs are suitable for non-contention based random access and comprise HARQ process IDs, the other group of RARs corresponding to the RAIDs are suitable for contention based random access and do not comprise HARQ process IDs, for example, when configuring random access resources, the random access resources are divided into two groups, one group is used for non-contention based random access, the other group is used for contention based random access, the base station can inform the UE through signaling, and when the UE receives the RARs, the UE can determine which format the corresponding RARs are according to the RAIDs, for example, { RAID 1, RAID 2} is suitable for non-contention based random access, { RAID 3, RAID 4} is suitable for contention based random access.
The method four:
Determining an RAR format through the PDCCH indication scrambled by the RA-RNTI; one way is to indicate in the 1-bit RAR format information in this PDCCH whether all RARs in the PDSCH scheduled by the PDCCH contain HARQ process IDs or do not contain HARQ process IDs, when the RAR format information indicates a value of "0", all RARs in the PDSCH scheduled by the PDCCH contain HARQ process IDs, and when the RAR format information indicates a value of "1", all RARs in the PDSCH scheduled by the PDCCH do not contain HARQ process IDs.
Or the number of RARs including HARQ process IDs in PDSCH scheduled by the PDCCH is indicated in the L-bit RAR format information in the PDCCH, as shown in fig. 5, for example, L is equal to 6, the value indicated by the RAR format is 000011, and the number of RARs with HARQ process IDs is 3, that is, the number of RARs with bit number of 20+n is 3.
And a fifth method:
directly scheduling uplink data by a PDCCH scrambled by the C-RNTI, wherein the PDCCH contains an HARQ process ID;
Or the PDSCH scheduled by the PDCCH scrambled by the C-RNTI directly schedules uplink data, and the HARQ process ID is contained in the PDSCH.
Based on the method provided by the present invention, the present invention also provides a terminal, as shown in fig. 7, including:
A transmitting unit 71 for transmitting a random access preamble;
A receiving unit 72, configured to receive a random access response RAR carried in a downlink shared channel PDSCH scheduled by the base station through a physical downlink control channel PDCCH;
a processing unit 73, configured to determine an HARQ process ID according to the PDCCH or PDSCH.
Based on the method provided by the present invention, the present invention also provides a base station, as shown in fig. 8, including:
a receiving unit 81, configured to receive a random access preamble sent by a terminal;
And a sending unit 82, configured to schedule, through a physical downlink control channel PDCCH, a random access response RAR carried in a physical downlink shared channel PDSCH, so that the terminal determines an HARQ process ID according to the PDCCH or PDSCH.
The invention also provides a terminal device comprising a memory and a first processor, wherein the memory is used for storing a computer program, and the computer program realizes the steps of the HARQ process ID configuration method when being executed by the first processor.
A base station device comprising a memory and a second processor, said memory being arranged to store a computer program which, when executed by the second processor, implements the steps of the HARQ process ID configuration method described above.
In the invention, the HARQ process identification ID is determined by PDCCH or PDSCH, thus avoiding confusion in the retransmission process of uplink data.
It will be understood by those within the art that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by computer program instructions. Those skilled in the art will appreciate that the computer program instructions can be implemented in a processor of a general purpose computer, special purpose computer, or other programmable data processing method, such that the blocks of the block diagrams and/or flowchart illustration are implemented by the processor of the computer or other programmable data processing method.
The modules of the device can be integrated into a whole or can be separately deployed. The modules can be combined into one module or further split into a plurality of sub-modules.
Those skilled in the art will appreciate that the drawing is merely a schematic representation of one preferred embodiment and that the modules or processes in the drawing are not necessarily required to practice the invention.
Those skilled in the art will appreciate that modules in an apparatus of an embodiment may be distributed in an apparatus of an embodiment as described in the embodiments, and that corresponding changes may be made in one or more apparatuses different from the present embodiment. The modules of the above embodiments may be combined into one module, or may be further split into a plurality of sub-modules.
The above-described inventive sequence numbers are merely for the purpose of description and do not represent the advantages or disadvantages of the embodiments.
The above disclosure is only a few specific embodiments of the present invention, but the present invention is not limited thereto, and any changes that can be thought by those skilled in the art should fall within the protection scope of the present invention.
Claims (12)
1. A method performed by a terminal in a wireless communication system, comprising:
Transmitting a random access preamble;
Receiving a random access response RAR carried in a physical downlink shared channel PDSCH scheduled by a base station through a physical downlink control channel PDCCH;
determining an HARQ process ID;
The determining the HARQ process ID includes any one of the following:
Acquiring indication information carried by PDCCH scrambled by a random access radio network temporary identifier RA-RNTI, and determining the HARQ process ID according to the indication information;
Reading an MAC header message carried in the PDSCH scheduled by the PDCCH, determining RAR format information according to the MAC header message, and determining the HARQ process ID according to the determined RAR format information; and
Extracting an HARQ process ID from RAR format information of RAR carried in PDSCH scheduled by the PDCCH;
wherein the RAR format information includes the number of bits of RAR;
Wherein, if the number of bits of the RAR is the first bit, the RAR does not include the HARQ process ID;
If the bit number of the RAR is the second bit, the RAR comprises an HARQ process ID;
wherein the second bit is greater than the first bit.
2. The method of claim 1, wherein the reading the MAC header message carried in the PDSCH scheduled by the PDCCH and determining RAR format information according to the MAC header message comprises:
reading each MAC sub-header message in the MAC sub-header message in sequence until the Random Access Preamble Identifier (RAPID) carried in a certain MAC sub-header message is matched with the sent random access preamble, and stopping reading;
And acquiring RAR format information in each read MAC sub-header message.
3. The method of claim 1, wherein the reading the MAC header message carried in the PDSCH scheduled by the PDCCH and determining RAR format information according to the MAC header message comprise:
reading a value of a Random Access Preamble Identifier (RAPID) carried in the MAC header message;
and determining the RAR format information in the MAC header message according to the value of the RAPID.
4. The method of claim 1, wherein the obtaining the indication information carried by the PDCCH scrambled with the random access radio network temporary identity RA-RNTI comprises at least one of:
an indication value of RAR format information;
the number of RARs containing HARQ process ID;
if the indicated value of the RAR format information is a first preset value, the RAR contains an HARQ process ID; if the indicated value of the RAR format information is a second preset value, the RAR does not contain the HARQ process ID.
5. A method performed by a base station in a wireless communication system, comprising:
Receiving a random access preamble sent by a terminal;
scheduling a random access response RAR carried in a physical downlink shared channel PDSCH through a physical downlink control channel PDCCH so that the terminal determines a HARQ process ID;
Configuring an HARQ process ID in the PDSCH or configuring an HARQ process ID in the PDCCH;
The method for configuring the HARQ process ID in the PDSCH includes any one of the following: configuring a value of a Random Access Preamble Identifier (RAPID) in an MAC header message carried in a Physical Downlink Shared Channel (PDSCH) scheduled by the PDCCH, so that the terminal determines RAR format information according to the value of the RAPID; configuring RAR format information in an MAC header message carried in the PDSCH scheduled by the PDCCH, so that the terminal determines an HARQ process ID according to the RAR format information; and configuring an HARQ process ID in each RAR format information of RAR carried in PDSCH of PDCCH scheduling;
the method for configuring the HARQ process ID in the PDCCH comprises the following steps: carrying indication information in a PDCCH scrambled by a random access radio network temporary identifier RA-RNTI so that the terminal determines the HARQ process ID according to the indication information;
wherein the RAR format information includes the number of bits of RAR;
Wherein, if the number of bits of the RAR is the first bit, the RAR does not include the HARQ process ID; if the bit number of the RAR is the second bit, the RAR comprises an HARQ process ID;
wherein the second bit is greater than the first bit.
6. A terminal, comprising:
a transmitting unit configured to transmit a random access preamble;
a receiving unit, configured to receive a random access response RAR carried in a physical downlink shared channel PDSCH scheduled by a base station through a physical downlink control channel PDCCH;
A processing unit, configured to determine a hybrid automatic repeat request HARQ process identity ID;
The processing unit is configured to determine the HARQ process processID by any one of the following methods:
Acquiring indication information carried by PDCCH scrambled by a random access radio network temporary identifier RA-RNTI, and determining the HARQ process ID according to the indication information;
Reading an MAC header message carried in the PDSCH scheduled by the PDCCH, determining RAR format information according to the MAC header message, and determining the HARQ process ID according to the determined RAR format information; and
Extracting an HARQ process ID from RAR format information of RAR carried in PDSCH scheduled by the PDCCH;
wherein the RAR format information includes the number of bits of RAR;
Wherein, if the number of bits of the RAR is the first bit, the RAR does not include the HARQ process ID; if the bit number of the RAR is the second bit, the RAR comprises an HARQ process ID;
wherein the second bit is greater than the first bit.
7. The terminal of claim 6, wherein the processing unit is configured to determine RAR format information by:
reading each MAC sub-header message in the MAC sub-header message in sequence until the Random Access Preamble Identifier (RAPID) carried in a certain MAC sub-header message is matched with the sent random access preamble, and stopping reading;
And acquiring RAR format information in each read MAC sub-header message.
8. The terminal of claim 6, wherein the processing unit is configured to determine RAR format information by:
reading a value of a Random Access Preamble Identifier (RAPID) carried in the MAC header message;
and determining the RAR format information in the MAC header message according to the value of the RAPID.
9. The terminal of claim 6, wherein the indication information includes at least one of:
an indication value of RAR format information;
the number of RARs containing HARQ process ID;
if the indicated value of the RAR format information is a first preset value, the RAR contains an HARQ process ID; if the indicated value of the RAR format information is a second preset value, the RAR does not contain the HARQ process ID.
10. A base station, comprising:
a receiving unit, configured to receive a random access preamble sent by a terminal;
A sending unit, configured to schedule, through a physical downlink control channel PDCCH, a random access response RAR carried in a physical downlink shared channel PDSCH, so that the terminal determines a hybrid automatic repeat request HARQ process identifier ID;
A processor for: configuring an HARQ process ID in the PDSCH or configuring an HARQ process ID in the PDCCH;
wherein the processor is configured to: configuring the HARQ process ID in the PDSCH is achieved by any one of:
configuring a value of a Random Access Preamble Identifier (RAPID) in an MAC header message carried in a Physical Downlink Shared Channel (PDSCH) scheduled by the PDCCH, so that the terminal determines RAR format information according to the value of the RAPID; configuring RAR format information in an MAC header message carried in the PDSCH scheduled by the PDCCH, so that the terminal determines an HARQ process ID according to the RAR format information; and configuring an HARQ process ID in each RAR format information of RAR carried in PDSCH of PDCCH scheduling;
wherein the processor is configured to: configuring a HARQ process ID in the PDCCH is achieved by:
Carrying indication information in a PDCCH scrambled by a random access radio network temporary identifier RA-RNTI, and determining the HARQ process ID according to the indication information;
wherein the RAR format information includes the number of bits of RAR;
Wherein, if the number of bits of the RAR is the first bit, the RAR does not include the HARQ process ID; if the bit number of the RAR is the second bit, the RAR comprises an HARQ process ID;
wherein the second bit is greater than the first bit.
11. A terminal device comprising a memory and a first processor, the memory being for storing a computer program which, when executed by the first processor, implements the steps of the method of any of claims 1-4.
12. A base station device comprising a memory and a second processor, the memory for storing a computer program which, when executed by the second processor, implements the steps of the method of any of claims 5.
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| CN201710914183.1A CN109617656B (en) | 2017-09-30 | 2017-09-30 | Terminal, base station and HARQ (hybrid automatic repeat request) process identification ID configuration method |
| PCT/KR2018/005236 WO2018203735A1 (en) | 2017-05-05 | 2018-05-04 | Apparatus and method for configuring channel resource in wireless communication system |
| US16/611,072 US11129205B2 (en) | 2017-05-05 | 2018-05-04 | Apparatus and method for configuring channel resource in wireless communication system |
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