CN113507748A - Random access response sending, receiving and transmitting method - Google Patents
Random access response sending, receiving and transmitting method Download PDFInfo
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- CN113507748A CN113507748A CN202110778036.2A CN202110778036A CN113507748A CN 113507748 A CN113507748 A CN 113507748A CN 202110778036 A CN202110778036 A CN 202110778036A CN 113507748 A CN113507748 A CN 113507748A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random 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, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention provides a method for sending, receiving and transmitting a random access response, wherein the method for sending the random access response comprises the following steps: acquiring a plurality of preamble sequences received on the same PRACH time frequency resource of a base station; the leader sequence is sent by the user equipment according to the physical random access channel requesting access; respectively connecting the RAPID value corresponding to each leader sequence with corresponding random access response information to generate a plurality of primary response information segments; according to the RAPID value, a plurality of primary response information segments are arranged in an ascending order, and the plurality of primary response information segments which are arranged in the ascending order are connected to generate a random access response; and respectively sending the random access response to a plurality of user equipment covered by the base station for response judgment. According to the invention, the random access response is generated by connecting the primary response information sections with the same length after the ascending sequence, and is sent to the user equipment for response matching, so that the time for the user equipment to judge whether the response is successful can be shortened, and the speed of the random access response is improved.
Description
Technical Field
The invention relates to the technical field of data transmission, in particular to a method for sending, receiving and transmitting random access response.
Background
In the broadband wireless Access technology, a User Equipment (UE) attempts to Access a base station by selecting a PRACH (Physical Random Access Channel) time-frequency resource and a RAPID (Random Access Preamble Identity). And the base station packs the RAPID corresponding to the received preamble sequence (preamble) and the corresponding random access response information to generate a random access response. And the UE determines whether the base station responds to the random access request sent by the UE by checking whether the random access response contains the RAPID corresponding to the preamble sent by the UE, and after the response is successful, the UE transmits uplink data to the base station through a PUSCH (physical uplink shared channel) according to the uplink scheduling information in the random access response.
However, when the base station receives the random access requests sent by a plurality of UEs at the same time, the base station directly packages the RAPID corresponding to the received preamble sequence (preamble) and the corresponding random access response information to generate random access responses and sends the random access responses to each UE, and when the UE receives the random access response message and then performs RAPID matching, the UE can only match each RAPID in the random access response message in sequence, so that the processing time of the UE is long, and especially when the user capacity supported by the base station is huge, the speed at which the UE determines whether the response is successful is slower.
Disclosure of Invention
The invention aims to provide a method for sending, receiving and transmitting a random access response, which can improve the speed of the random access response.
In order to achieve the purpose, the invention provides the following scheme:
a method for transmitting a random access response, comprising:
acquiring a plurality of preamble sequences received on the same PRACH time frequency resource of a base station; the leader sequence is sent by the user equipment according to the physical random access channel requesting access; the number of the preamble sequences received by the base station is less than or equal to the number of the user equipment sending the preamble sequences to the base station;
connecting the RAPID value corresponding to each leader sequence with corresponding random access response information respectively to generate a plurality of primary response information segments; the lengths of the primary response information segments are the same;
according to the RAPID value, a plurality of the primary response information segments are arranged in an ascending order, and the plurality of the primary response information segments which are arranged in the ascending order are connected to generate a random access response;
and respectively sending the random access response to a plurality of user equipment covered by the base station for response judgment.
Optionally, after the connecting the RAPID value corresponding to each preamble sequence with the corresponding random access response information respectively to generate a plurality of primary response information segments, the method further includes:
when a plurality of user equipment simultaneously send the same leader sequence to the base station, the base station marks the primary response information segment corresponding to the leader sequence to obtain the primary response information segment with the mark.
Optionally, after the sending the random access responses to the plurality of user equipments covered by the base station respectively for response judgment, the method further includes:
the base station receives uplink data containing a competition resolving identifier through a PUSCH (physical uplink shared channel), and sends downlink data containing the competition resolving identifier to user equipment; the base station receives only one of the uplink data containing the competition resolving identification corresponding to the same PUSCH; the uplink data containing the contention resolution identification is sent to the base station when the user equipment determines that an RAPID value corresponding to a preamble sequence sent by the user equipment exists in the random access response and a primary response information segment corresponding to the preamble sequence sent by the user equipment is a primary response information segment with a mark; the contention resolution identities are all different for different user equipments.
A method of receiving a random access response, comprising:
the user equipment acquires a random access response after sending a preamble sequence to the base station according to the physical random access channel which requests access; the random access response is generated by connecting RAPID values corresponding to a plurality of leader sequences on the same PRACH time frequency resource with corresponding random access response information by a base station to generate a plurality of primary response information segments, arranging the plurality of primary response information segments in an ascending order according to the RAPID values, and then connecting the plurality of primary response information segments after the ascending order; the lengths of the primary response information segments are the same; the number of the preamble sequences received by the base station is less than or equal to the number of the user equipment sending the preamble sequences to the base station;
and determining whether the random access response has an RAPID value corresponding to a leader sequence sent by the user equipment by utilizing a binary search method so as to determine whether the response of the user equipment and the base station is successful.
Optionally, the determining whether the random access response includes a RAPID value corresponding to a preamble sequence sent by the user equipment itself to determine whether the response between the user equipment and the base station is successful specifically includes:
if the random access response has the RAPID value corresponding to the leader sequence sent by the user equipment, judging whether a primary response information segment corresponding to the leader sequence sent by the user equipment is a primary response information segment with a mark or not, and obtaining a first judgment result;
if the first judgment result is yes, sending uplink data containing a competition resolving identifier to the base station through a PUSCH (physical uplink shared channel) according to uplink scheduling information in a random access response;
and if the first judgment result is negative, the user equipment and the base station respond successfully.
Optionally, after the sending the uplink data including the contention resolution identity to the base station through the PUSCH channel according to the uplink scheduling information in the random access response, the method further includes:
acquiring downlink data containing a competition resolving identifier; the downlink data containing the competition resolving identification is generated by the base station according to the received uplink data containing the competition resolving identification;
and determining whether the response between the user equipment and the base station is successful according to whether the competition resolving identifier sent by the user equipment exists in the downlink data containing the competition resolving identifier.
A method for transmitting a random access response, comprising:
a plurality of user equipment respectively sends a leader sequence to a base station according to a physical random access channel which requests to be accessed;
acquiring a plurality of preamble sequences received on the same PRACH time frequency resource of the base station; the number of the preamble sequences received by the base station is less than or equal to the number of the user equipment sending the preamble sequences to the base station;
the base station connects RAPID values corresponding to a plurality of preamble sequences received on the same PRACH time frequency resource with corresponding random access response information respectively to generate a plurality of primary response information segments; the lengths of the primary response information segments are the same;
the base station carries out ascending sequence arrangement on the primary response information segments according to the RAPID value, and connects the primary response information segments after ascending sequence arrangement to generate random access response;
and determining whether a leader sequence sent by the user equipment exists in the random access response by using a binary search method respectively for a plurality of user equipments covered by the base station so as to determine whether the response of the user equipment and the base station is successful.
Optionally, the base station connects RAPID values corresponding to multiple preamble sequences received on the same PRACH time-frequency resource with corresponding random access response information, to generate multiple primary response information segments, and then the method further includes:
when a plurality of user equipment simultaneously send the same leader sequence to the base station, the base station marks the primary response information segment corresponding to the leader sequence to obtain the primary response information segment with the mark.
Optionally, the determining whether the random access response includes a preamble sequence sent by the user equipment itself to determine whether the response between the user equipment and the base station is successful specifically includes;
if the random access response has the RAPID value corresponding to the leader sequence sent by the user equipment, judging whether a primary response information segment corresponding to the leader sequence sent by the user equipment is a primary response information segment with a mark or not, and obtaining a second judgment result;
if the second judgment result is yes, the user equipment sends uplink data containing the competition resolving identification to the base station through a PUSCH (physical uplink shared channel) according to uplink scheduling information in the random access response; the competition resolving identifications of different user equipment are different;
and if the second judgment result is negative, the user equipment and the base station respond successfully.
Optionally, after the ue sends the uplink data including the contention resolution identifier to the base station through the PUSCH channel according to the uplink scheduling information in the random access response, the method further includes:
the base station receives uplink data containing a competition resolving identifier through a PUSCH (physical uplink shared channel), and sends the downlink data containing the competition resolving identifier to user equipment;
and the user equipment determines whether the response between the user equipment and the base station is successful or not according to whether the competition resolving identifier sent by the user equipment exists in the downlink data containing the competition resolving identifier or not.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention provides a method for sending, receiving and transmitting a random access response, wherein the method for sending the random access response comprises the following steps: acquiring a plurality of preamble sequences received on the same PRACH time frequency resource of a base station; the leader sequence is sent by the user equipment according to the physical random access channel requesting access; respectively connecting the RAPID value corresponding to each leader sequence with corresponding random access response information to generate a plurality of primary response information segments; according to the RAPID value, a plurality of primary response information segments are arranged in an ascending order, and the plurality of primary response information segments which are arranged in the ascending order are connected to generate a random access response; and respectively sending the random access response to a plurality of user equipment covered by the base station for response judgment. According to the invention, the random access response is generated by connecting the primary response information sections with the same length after the ascending sequence, and is sent to the user equipment for response matching, so that the time for the user equipment to judge whether the response is successful can be shortened, and the speed of the random access response is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
Fig. 1 is a flowchart of a method for sending a random access response according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for receiving a random access response according to an embodiment of the present invention;
fig. 3 is a flowchart of a method for transmitting a random access response according to an embodiment of the present invention;
fig. 4 is a flowchart of a method for receiving and sending a random access response according to an embodiment of the present invention;
FIG. 5 is a diagram illustrating a segment of one-time response information according to an embodiment of the present invention;
fig. 6 is a diagram illustrating a random access response according to an embodiment of the present invention;
fig. 7 is a flowchart of a method for receiving and sending a random access response according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a method for sending, receiving and transmitting a random access response, which can improve the speed of the random access response.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Fig. 1 is a flowchart of a method for sending a random access response according to an embodiment of the present invention, and as shown in fig. 1, the present invention provides a method for sending a random access response, including:
step 101: acquiring a plurality of preamble sequences received on the same PRACH time frequency resource of a base station; the leader sequence is sent by the user equipment according to the physical random access channel requesting access; the number of the leader sequences received by the base station is less than or equal to the number of the user equipment which sends the leader sequences to the base station;
step 102: respectively connecting the RAPID value corresponding to each leader sequence with corresponding random access response information to generate a plurality of primary response information segments; the lengths of the plurality of primary response information segments are the same;
step 103: according to the RAPID value, a plurality of primary response information segments are arranged in an ascending order, and the plurality of primary response information segments which are arranged in the ascending order are connected to generate a random access response;
step 104: and respectively sending the random access response to a plurality of user equipment covered by the base station for response judgment.
After step 102, further comprising:
when a plurality of user equipment simultaneously send the same leader sequence to the base station, the base station marks the primary response information segment corresponding to the leader sequence to obtain the primary response information segment with the mark.
After step 104, further comprising:
the base station receives uplink data containing a competition resolving identifier through a PUSCH (physical uplink shared channel), and sends downlink data containing the competition resolving identifier to user equipment; the base station receives only one of a plurality of uplink data containing the competition resolving identification corresponding to the same PUSCH; the uplink data containing the competition resolving identification is sent to the base station when the user equipment determines that an RAPID value corresponding to a leader sequence sent by the user equipment exists in a random access response and a primary response information segment corresponding to the leader sequence sent by the user equipment is a primary response information segment with a mark; the contention resolution identities are all different for different user equipments.
Fig. 2 is a flowchart of a method for receiving a random access response according to an embodiment of the present invention, and as shown in fig. 2, the present invention further provides a method for receiving a random access response, including:
step 201: the user equipment acquires a random access response after sending a preamble sequence to the base station according to the physical random access channel which requests access; the random access response is generated by connecting RAPID values corresponding to a plurality of leader sequences on the same PRACH time-frequency resource with corresponding random access response information by a base station to generate a plurality of primary response information segments, arranging the plurality of primary response information segments in an ascending order according to the RAPID values, and then connecting the plurality of primary response information segments after the ascending order; the lengths of the plurality of primary response information segments are the same; the number of the leader sequences received by the base station is less than or equal to the number of the user equipment which sends the leader sequences to the base station;
step 202: and determining whether the random access response has an RAPID value corresponding to a leader sequence sent by the user equipment by utilizing a binary search method so as to determine whether the response of the user equipment and the base station is successful.
if the random access response has the RAPID value corresponding to the leader sequence sent by the user equipment, judging whether a primary response information segment corresponding to the leader sequence sent by the user equipment is a primary response information segment with a mark or not to obtain a first judgment result;
if the first judgment result is yes, sending the uplink data containing the competition resolving identification to the base station through a PUSCH (physical uplink shared channel) according to uplink scheduling information in the random access response;
and if the first judgment result is negative, the user equipment and the base station respond successfully.
After the uplink data containing the contention resolution identification is sent to the base station through the PUSCH channel according to the uplink scheduling information in the random access response, the method further includes:
acquiring downlink data containing a competition resolving identifier; the downlink data containing the competition resolving identification is generated by the base station according to the received uplink data containing the competition resolving identification;
and determining whether the response between the user equipment and the base station is successful according to whether the competition resolving identifier sent by the user equipment exists in the downlink data containing the competition resolving identifier.
Fig. 3 is a flowchart of a method for transmitting a random access response according to an embodiment of the present invention, and as shown in fig. 3, the present invention further provides a method for transmitting a random access response, including:
step 301: a plurality of user equipment respectively sends a leader sequence to a base station according to a physical random access channel which requests to be accessed;
step 302: acquiring a plurality of preamble sequences received on the same PRACH time frequency resource of a base station; the number of the leader sequences received by the base station is less than or equal to the number of the user equipment which sends the leader sequences to the base station;
step 303: the base station connects RAPID values corresponding to a plurality of preamble sequences received on the same PRACH time frequency resource with corresponding random access response information respectively to generate a plurality of primary response information segments; the lengths of the plurality of primary response information segments are the same;
step 304: the base station carries out ascending sequence arrangement on the plurality of primary response information segments according to the RAPID value, and connects the plurality of primary response information segments after ascending sequence arrangement to generate random access response;
step 305: and the plurality of user equipment covered by the base station respectively utilize a binary search method to determine whether the random access response has a leader sequence sent by the user equipment so as to determine whether the response of the user equipment and the base station is successful.
After step 303, further comprising:
when a plurality of user equipment simultaneously send the same leader sequence to the base station, the base station marks the primary response information segment corresponding to the leader sequence to obtain the primary response information segment with the mark.
if the random access response has the RAPID value corresponding to the leader sequence sent by the user equipment, judging whether the primary response information segment corresponding to the leader sequence sent by the user equipment is the primary response information segment with the mark or not, and obtaining a second judgment result;
if the second judgment result is yes, the user equipment sends the uplink data containing the competition resolving identification to the base station through a PUSCH (physical uplink shared channel) according to uplink scheduling information in the random access response; the competition resolving identifications of different user equipment are different;
and if the second judgment result is negative, the user equipment and the base station respond successfully.
After the user equipment sends the uplink data containing the contention resolution identification to the base station through a PUSCH channel according to the uplink scheduling information in the random access response, the method further includes:
the base station receives uplink data containing the competition resolving identification through a PUSCH (physical uplink shared channel), and sends the downlink data containing the competition resolving identification to the user equipment;
and the user equipment determines whether the response between the user equipment and the base station is successful according to whether the competition resolving identifier sent by the user equipment exists in the downlink data containing the competition resolving identifier.
Fig. 4 is a flowchart of a method for receiving and sending a random access response according to an embodiment of the present invention, and as shown in fig. 4, the method for transmitting a random access response according to the present invention specifically includes the following steps:
1) n UEs (UEs) within cell C0，UE1，…，UEi…，UEn) And initiating random access requests on the same PRACH time-frequency resource R, and randomly selecting one random access preamble by each UE to send the random access requests. Since the selected preamble may repeat, assume that a total of N (N ≦ N) different preambles are issuedambles, respectively P0，P1，…，Pn-1。
2) The base station of the cell C detects the random access request on the time frequency resource R in the step 1), and the base station is supposed to receive M (M is less than or equal to N) random access requests because all preambles can not be normally received by the base station. The M random Access requests are responded in a media Access Control Protocol Data Unit (MAC PDU), each response of the random Access request corresponds to a primary response information segment (MAC sub PDU), the primary response information segment carries a random Access identifier (RAPID) corresponding to a preamble and other information used for random Access, and the number of occupied bytes is K. One-time response information segment structure as shown in FIG. 5, the random access response MAC PDU is a combination of M MAC sub PDUs, where P0、P1，…，Pi，...PM-1Are both denoted RAPID.
3) The base station generates a random access response (i.e., a mac pdu) and transmits it to the UE. The base station sorts the M MAC sub-PDUs from small to large according to RAPID, and the sorting result is P0'，P1'，…，Pi'，...，P'M-1(ii) a The M MAC sub-pdus are concatenated to form a complete MAC pdu, which occupies K × M consecutive bytes in the middle of the memory, as shown in fig. 6.
4) UE in cell CiAnd (i is more than or equal to 0 and less than or equal to n), receiving the MAC PDU, analyzing the MAC PDU, and checking whether the MAC sub PDU matched with the random access preamble sent by the MAC sub PDU is carried. Suppose the index of random access preamble sent by UEi is XiSince the MAC sub-PDUs are arranged in the MAC PDUs sequentially from small to large according to RAPID, the UEiIn finding RAPID as XiWhen the MAC sub PDU is searched, the MAC sub PDU does not need to be searched from beginning to end, the MAC sub PDU can be searched by a searching method (such as a binary searching method) aiming at an ordered table commonly used in the technical field of computing, if the searching is successful, the base station is considered to respond to the random access request of the base station, and X isiContinuing the subsequent random access process by using other information carried in the MAC sub PDU; if the search fails, the base station is considered not to respond to the random access request of the base stationAnd the random access fails.
For example, cell C is configured with 64 random access preables, the index values of which are from 0 to 63. Specifically, the implementation steps of the invention are as follows:
(1) in cell C, 6 UEs initiate a random access request on PRACH resource R, and the transmitted preamble is shown in table 1.
TABLE 1 preambl sent by UE
| UE numbering | preambl |
| 0# | 2 |
| 1# | 7 |
| 2# | 9 |
| 3# | 15 |
| 4# | 20 |
| 5# | 25 |
(2) The base station detects 5 different preambls on the PRACH resource R, which are: 2. 7, 9, 15, 20, the RAPID value (25) sent by UE 5# is not detected by the base station.
(3) The base station responds to the detected 5 preambles in the same MAC PDU, the response of each preamble is one MAC sub PDU, each MAC sub PDU comprises the RAPID and MAC RAR (media Access Control protocol compressed packet) information of the response, and the occupied byte length is 8 bytes. The 5 MAC sub-PDUs are arranged in a continuous storage space from small to sequential according to RAPID to form a complete random access response MAC PDU, as shown in fig. 7.
(4) The base station transmits the random access response MAC PDU through a DL-SCH (downlink shared channel).
(5) The UE (0# -5#) receives the random access response MAC PDU and checks whether there is a MAC sub-PDU matching the preambl it issues. Since the MAC PDU includes 5 MAC sub-PDUs and they are ordered according to RAPID, each UE compares RAPID in the MAC sub-PDU with preamble sent by itself according to binary search method, and the comparison process is shown in table 2.
TABLE 2 search results by binary search
(6) Each UE carries out subsequent processing according to the respective matching result, and if the matching is successful, the corresponding MAC RAR is utilized to continue the subsequent flow; if the matching fails, the UE considers that the random access fails, the random access request may be initiated again subsequently, and the random access process may also be terminated.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. A method for sending a random access response, the method comprising:
acquiring a plurality of preamble sequences received on the same PRACH time frequency resource of a base station; the leader sequence is sent by the user equipment according to the physical random access channel requesting access; the number of the preamble sequences received by the base station is less than or equal to the number of the user equipment sending the preamble sequences to the base station;
connecting the RAPID value corresponding to each leader sequence with corresponding random access response information respectively to generate a plurality of primary response information segments; the lengths of the primary response information segments are the same;
according to the RAPID value, a plurality of the primary response information segments are arranged in an ascending order, and the plurality of the primary response information segments which are arranged in the ascending order are connected to generate a random access response;
and respectively sending the random access response to a plurality of user equipment covered by the base station for response judgment.
2. The method for sending random access response according to claim 1, wherein after the generating a plurality of primary response information segments by connecting the RAPID value corresponding to each preamble sequence with the corresponding random access response information, the method further comprises:
when a plurality of user equipment simultaneously send the same leader sequence to the base station, the base station marks the primary response information segment corresponding to the leader sequence to obtain the primary response information segment with the mark.
3. The method of claim 2, wherein after the determining the responses by sending the random access responses to the plurality of ues covered by the base station, the method further comprises:
the base station receives uplink data containing a competition resolving identifier through a PUSCH (physical uplink shared channel), and sends downlink data containing the competition resolving identifier to user equipment; the base station receives only one of the uplink data containing the competition resolving identification corresponding to the same PUSCH; the uplink data containing the contention resolution identification is sent to the base station when the user equipment determines that an RAPID value corresponding to a preamble sequence sent by the user equipment exists in the random access response and a primary response information segment corresponding to the preamble sequence sent by the user equipment is a primary response information segment with a mark; the contention resolution identities are all different for different user equipments.
4. A method for receiving a random access response, the method comprising:
the user equipment acquires a random access response after sending a preamble sequence to the base station according to the physical random access channel which requests access; the random access response is generated by connecting RAPID values corresponding to a plurality of leader sequences on the same PRACH time frequency resource with corresponding random access response information by a base station to generate a plurality of primary response information segments, arranging the plurality of primary response information segments in an ascending order according to the RAPID values, and then connecting the plurality of primary response information segments after the ascending order; the lengths of the primary response information segments are the same; the number of the preamble sequences received by the base station is less than or equal to the number of the user equipment sending the preamble sequences to the base station;
and determining whether the random access response has an RAPID value corresponding to a leader sequence sent by the user equipment by utilizing a binary search method so as to determine whether the response of the user equipment and the base station is successful.
5. The method for receiving a random access response according to claim 4, wherein the determining whether the random access response has a RAPID value corresponding to a preamble sequence sent by the user equipment itself to determine whether the response between the user equipment and the base station is successful specifically includes:
if the random access response has the RAPID value corresponding to the leader sequence sent by the user equipment, judging whether a primary response information segment corresponding to the leader sequence sent by the user equipment is a primary response information segment with a mark or not, and obtaining a first judgment result;
if the first judgment result is yes, sending uplink data containing a competition resolving identifier to the base station through a PUSCH (physical uplink shared channel) according to uplink scheduling information in a random access response;
and if the first judgment result is negative, the user equipment and the base station respond successfully.
6. The method for receiving a random access response according to claim 5, wherein after the uplink data including the contention resolution indicator is transmitted to the base station through the PUSCH channel according to the uplink scheduling information in the random access response, the method further includes:
acquiring downlink data containing a competition resolving identifier; the downlink data containing the competition resolving identification is generated by the base station according to the received uplink data containing the competition resolving identification;
and determining whether the response between the user equipment and the base station is successful according to whether the competition resolving identifier sent by the user equipment exists in the downlink data containing the competition resolving identifier.
7. A method for transmitting a random access response, the method comprising:
a plurality of user equipment respectively sends a leader sequence to a base station according to a physical random access channel which requests to be accessed;
acquiring a plurality of preamble sequences received on the same PRACH time frequency resource of the base station; the number of the preamble sequences received by the base station is less than or equal to the number of the user equipment sending the preamble sequences to the base station;
the base station connects RAPID values corresponding to a plurality of preamble sequences received on the same PRACH time frequency resource with corresponding random access response information respectively to generate a plurality of primary response information segments; the lengths of the primary response information segments are the same;
the base station carries out ascending sequence arrangement on the primary response information segments according to the RAPID value, and connects the primary response information segments after ascending sequence arrangement to generate random access response;
and determining whether a leader sequence sent by the user equipment exists in the random access response by using a binary search method respectively for a plurality of user equipments covered by the base station so as to determine whether the response of the user equipment and the base station is successful.
8. The method for transmitting random access response according to claim 7, wherein the base station connects RAPID values corresponding to a plurality of preamble sequences received on the same PRACH time-frequency resource with corresponding random access response information, respectively, to generate a plurality of primary response information segments, and then further comprises:
when a plurality of user equipment simultaneously send the same leader sequence to the base station, the base station marks the primary response information segment corresponding to the leader sequence to obtain the primary response information segment with the mark.
9. The method for transmitting the random access response according to claim 8, wherein the determining whether the random access response includes a preamble sequence sent by the ue itself to determine whether the response between the ue and the base station is successful includes;
if the random access response has the RAPID value corresponding to the leader sequence sent by the user equipment, judging whether a primary response information segment corresponding to the leader sequence sent by the user equipment is a primary response information segment with a mark or not, and obtaining a second judgment result;
if the second judgment result is yes, the user equipment sends uplink data containing the competition resolving identification to the base station through a PUSCH (physical uplink shared channel) according to uplink scheduling information in the random access response; the competition resolving identifications of different user equipment are different;
and if the second judgment result is negative, the user equipment and the base station respond successfully.
10. The method for transmitting random access response according to claim 9, wherein after the ue transmits uplink data including the contention resolution indicator to the base station through the PUSCH channel according to the uplink scheduling information in the random access response, the method further includes:
the base station receives uplink data containing a competition resolving identifier through a PUSCH (physical uplink shared channel), and sends the downlink data containing the competition resolving identifier to user equipment;
and the user equipment determines whether the response between the user equipment and the base station is successful or not according to whether the competition resolving identifier sent by the user equipment exists in the downlink data containing the competition resolving identifier or not.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120002606A1 (en) * | 2009-03-22 | 2012-01-05 | Dragan Vujcic | Random access response processing |
| CN104254135A (en) * | 2013-06-27 | 2014-12-31 | 夏普株式会社 | Physical random access channel sending and receiving methods, base station and user equipment |
| CN106793147A (en) * | 2017-03-02 | 2017-05-31 | 西安电子科技大学 | Pilot tone accidental access method based on timing-advance information |
| CN109392017A (en) * | 2017-08-11 | 2019-02-26 | 电信科学技术研究院 | A kind of method, apparatus of random access response, base station and terminal |
| CN110447299A (en) * | 2017-03-29 | 2019-11-12 | 夏普株式会社 | Random access procedure for radio system |
-
2021
- 2021-07-09 CN CN202110778036.2A patent/CN113507748B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120002606A1 (en) * | 2009-03-22 | 2012-01-05 | Dragan Vujcic | Random access response processing |
| CN104254135A (en) * | 2013-06-27 | 2014-12-31 | 夏普株式会社 | Physical random access channel sending and receiving methods, base station and user equipment |
| CN106793147A (en) * | 2017-03-02 | 2017-05-31 | 西安电子科技大学 | Pilot tone accidental access method based on timing-advance information |
| CN110447299A (en) * | 2017-03-29 | 2019-11-12 | 夏普株式会社 | Random access procedure for radio system |
| CN109392017A (en) * | 2017-08-11 | 2019-02-26 | 电信科学技术研究院 | A kind of method, apparatus of random access response, base station and terminal |
Non-Patent Citations (2)
| Title |
|---|
| ABC666862: ""C语言二分法查找"", 《CSDN》 * |
| SAMSUNG，R2-1706609: ""Small issues from email discussion [98#35] (running 38.321)"", 《3GPP TSG-RAN WG2 NR AD HOC》 * |
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