CN107888238B - Method and device for UE (user equipment) and base station for random access - Google Patents
Method and device for UE (user equipment) and base station for random access Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0408—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
- H04L1/0039—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver other detection of signalling, e.g. detection of TFCI explicit signalling
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- H04W74/00—Wireless channel access
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/002—Transmission of channel access control information
- H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
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Abstract
The invention discloses a method and a device for random access in UE (user equipment), a base station. The UE firstly sends a first wireless signal on a first air interface resource; the first signaling is then monitored for a first time window. The first air interface resource is one air interface resource in a first uplink resource pool, and the first uplink resource pool comprises a positive integer of the air interface resources. One of the air interface resources comprises a time frequency resource and a characteristic sequence. The first uplink resource pool is one of G uplink resource pools, and G is a positive integer. The first signaling is physical layer signaling, an identification of the first signaling being associated with at least the latter of { an identification of the first empty resource, an index of the first uplink resource pool among the G uplink resource pools }. At least two RUs occupied by the uplink resource pools in the G uplink resource pools are overlapped. The RU occupies the duration of one wideband symbol in the time domain and one subcarrier in the frequency domain.
Description
Technical Field
The present invention relates to a Random Access (RA) scheme in a wireless communication system, and more particularly, to an RA scheme in a wireless communication system using a Multiple Input Multiple Output (MIMO) technique.
Background
Large scale (Massive) MIMO has become a research hotspot for next generation mobile communications. In large-scale MIMO, multiple antennas form a narrow beam pointing to a specific direction by beamforming to improve communication quality. The beam formed by multi-antenna beamforming is generally narrow, and both communication parties need to obtain partial channel information of the other party to enable the formed beam to point to the correct direction. Before a UE (User Equipment) performs RA, a base station cannot obtain channel information of the UE, and therefore how to make the RA process benefit from large-scale MIMO is a problem to be studied.
A Contention-Based RA procedure (Contention-Based RA procedure) in a conventional 3GPP (3rd Generation Partner Project) LTE (long term Evolution) system includes four steps: UE sends a random preamble sequence (preamble) to a base station; a base station sends an RAR (Random Access Response) to UE; the UE sends Layer 2/Layer 3(Layer 2/Layer 3) information to the base station; the base station transmits contention resolution (contention resolution) information to the UE.
Disclosure of Invention
The inventor finds out through research that before performing the RA procedure, the UE can obtain partial channel information by using some downlink common signals (e.g., synchronization signals, broadcast signals, reference signals, etc.), and in the first step of the RA, the channel information is notified to the base station by transmitting a random preamble sequence, so in the second step and the fourth step of the RA, the base station can transmit RAR and contention resolution information to the UE by using multi-antenna beamforming based on the channel information of the UE, thereby improving the efficiency and quality of the RA.
Since different UEs may need different beamforming vectors, the signaling identifier of the dci (downlink Control information) signaling corresponding to the RAR in the conventional system cannot reflect the used beamforming vectors, and thus the UE may need to receive RARs corresponding to multiple beamforming vectors, although in practice, the UE only needs to receive RARs corresponding to its own associated beamforming vectors. This results in increased UE processing complexity.
The present application discloses a solution to the above-mentioned problem. It should be noted that, without conflict, the embodiments and features in the embodiments in the UE of the present application may be applied to the base station, and vice versa. Further, the embodiments and features of the embodiments of the present application may be arbitrarily combined with each other without conflict.
The application discloses a method for UE of random access, which comprises the following steps:
-step a. transmitting a first wireless signal on a first air interface resource;
-step b. monitoring the first signalling in a first time window.
The first air interface resource is one air interface resource in a first uplink resource pool, and the first uplink resource pool comprises a positive integer of the air interface resources. One of the air interface resources comprises a time frequency resource and a characteristic sequence. The first uplink resource pool is one of G uplink resource pools, where G is a positive integer, and the uplink resource pool includes a positive integer of the air interface resources. The first signaling is physical layer signaling, an identification of the first signaling being associated with at least the latter of { an identification of the first empty resource, an index of the first uplink resource pool among the G uplink resource pools }. At least two RUs (Resource units) occupied by the uplink Resource pools in the G uplink Resource pools are overlapped. The RU occupies the duration of one wideband symbol in the time domain and one subcarrier in the frequency domain.
As an embodiment, the UE selects the first air interface resource from the first uplink resource pool by itself.
As one embodiment, the signature sequence comprises a pseudorandom sequence.
As an example, the signature sequence comprises a Zadoff-Chu sequence.
As an example, the signature sequence includes CP (Cyclic Prefix).
As an embodiment, the Physical layer CHannel corresponding to the air interface resource includes a PRACH (Physical random access CHannel).
As an embodiment, { identification of the first empty resource, index of the first uplink resource pool in the G uplink resource pools } at least the latter is used for generating identification of the first signaling. As a sub-embodiment, the identifier of the first air interface resource includes at least one of { a time domain resource occupied by the first air interface resource, a frequency domain resource occupied by the first air interface resource, and the signature sequence occupied by the first air interface resource }.
The above method has an advantage that by establishing a relationship between the identifier of the first signaling and at least the latter of { the identifier of the first air interface resource, the index of the first uplink resource pool in the G uplink resource pools }, the UE can determine whether the first signaling is for itself through the identifier of the first signaling, thereby reducing the complexity of subsequent processing.
As an embodiment, the identifier of the first signaling is used to determine at least one of { RS sequence of DMRS of the first signaling, CRC of the first signaling, scrambling sequence of CRC of the first signaling, time-frequency resources occupied by the first signaling }.
In one embodiment, the first wireless signal is generated by modulating the signature sequence corresponding to the first air interface resource.
As an embodiment, the identifier of the first signaling and the identifier of the first air interface resource are respectively non-negative integers.
As an embodiment, the first signaling is DCI (Downlink Control Information).
As an embodiment, the physical layer channel corresponding to the first signaling includes a downlink physical layer control channel (i.e., a downlink channel that can only be used for carrying physical layer control information). As a sub-embodiment, the first signaling is transmitted on a PDCCH (Physical Downlink Control Channel).
As an embodiment, the first time window comprises a plurality of sub-time windows in which the UE monitors the first signaling. As a sub-embodiment, the monitoring refers to receiving based on blind detection, that is, receiving signals in each of the sub-time windows and performing decoding operation, and if the decoding is determined to be correct according to the check bits, determining that the receiving is successful, otherwise, determining that the receiving is failed.
As an embodiment, any two different air interface resources are orthogonal to each other. As a sub-embodiment, the time frequency resources corresponding to any two different air interface resources are mutually orthogonal, or any two different air interface resources correspond to the same time frequency resource and the mutually orthogonal characteristic sequence.
As an embodiment, the uplink resource pool includes a plurality of time units in a time domain. As a sub-embodiment, the time unit is the duration of one wideband symbol. As a sub-embodiment, the plurality of time units are discontinuous in the time domain. As a sub-embodiment, the plurality of time units are consecutive in the time domain.
As an embodiment, the uplink resource pool includes a plurality of frequency units in a frequency domain, and as a sub-embodiment, the frequency unit is a bandwidth occupied by one subcarrier. As a sub-embodiment, the plurality of frequency units are discontinuous in the frequency domain. As a sub-embodiment, the plurality of frequency units are contiguous in the frequency domain.
As an embodiment, a plurality of different air interface resources may be mapped to one time frequency resource through a plurality of different characteristic sequences.
As an embodiment, any two of the G uplink resource pools occupy the same RU and the signature sequences that are orthogonal to each other. The RU occupies one subcarrier in the frequency domain and one wideband symbol duration in the time domain. As a sub-embodiment, the duration of the one wideband symbol is the inverse of the subcarrier corresponding to the corresponding RU. As a sub-embodiment, the wideband symbol is one of { OFDM symbol, SC-FDMA symbol, SCMA symbol }.
As an embodiment of the present application, according to an aspect of the present application, the step B further includes the steps of:
-step b1. receiving a second wireless signal.
The first signaling comprises scheduling information of the second wireless signal, wherein the scheduling information comprises at least one of { occupied time domain resource, occupied frequency domain resource, occupied code domain resource, MCS, NDI, RV, HARQ process number }.
As one embodiment, the second wireless signal includes an RAR (Random Access Response).
The above method has an advantage that by establishing a link between the identity of the first signaling and at least the latter of { the identity of the first air interface resource, the first uplink resource pool indexes in the G uplink resource pools }, so that the UE can identify the second radio signal for itself through the identity of the first signaling, the complexity of reception of the second radio signal is reduced.
As an embodiment, the physical layer channel corresponding to the second wireless signal includes a downlink physical layer data channel (i.e. a downlink channel capable of carrying physical layer data). As a sub-embodiment, the second wireless signal is transmitted on a PDSCH (Physical Downlink Shared Channel).
As an embodiment, the transmission Channel corresponding to the second wireless signal is a DL-SCH (downlink shared Channel).
As an embodiment of the present application, according to an aspect of the present application, the step a further includes the steps of:
-step A0. receiving downstream information;
step A1. receiving a downlink RS (Reference Signal).
Wherein the downlink information is used to determine at least one of { G antenna port groups, the G uplink resource pools, a correspondence between G antenna port groups and the G uplink resource pools }. The uplink resource pool comprises a positive integer of the air interface resources. The downlink RS comprises G RS ports, the G RS ports are respectively sent by the G antenna port groups, and the G antenna port groups correspond to the G uplink resource pools one by one. The first uplink resource pool is one of the G uplink resource pools, and the antenna port group corresponding to the first uplink resource pool is a first antenna port group.
As an embodiment, the downlink information is cell-common.
As an embodiment, the downlink information is indicated by higher layer signaling.
As an embodiment, the downlink information is indicated by physical layer signaling.
As an embodiment, the downlink RS is used by the UE to determine the first antenna port group from the G antenna port groups.
As an embodiment, the receiving quality of the RS port corresponding to the first antenna port group is higher than the receiving quality of the RS port corresponding to a given antenna port group, where the given antenna port group is any one of the antenna port groups in the G antenna port groups that is not equal to the first antenna port group.
As a sub-embodiment of the above-mentioned embodiments, the receiving Quality includes one or two of { RSRP (Reference Signal Received Power) }.
As an embodiment, the G RS ports are transmitted at different time intervals, respectively.
As an embodiment, the antenna port group includes 1 antenna port.
As an embodiment, the number of antenna ports in the antenna port group is greater than 1.
As an embodiment, any two different ones of the G antenna port groups cannot be assumed to be the same.
As a sub-embodiment of the foregoing embodiment, the antenna port is formed by superimposing a plurality of antennas through antenna Virtualization (Virtualization), and mapping coefficients of the plurality of antennas to the antenna port form a beamforming vector. The beamforming vectors corresponding to a first antenna port and a second antenna port, which belong to any two different antenna port groups of the G antenna port groups, cannot be assumed to be the same.
As a sub-embodiment of the foregoing embodiment, the UE cannot perform joint channel estimation by using reference signals transmitted by any two antenna port groups of the G antenna port groups.
The method has the advantage that the UE can feed back the information of the first antenna port group through the first air interface resource by establishing a one-to-one correspondence relationship between the G antenna port groups and the G uplink resource pools.
As an embodiment of the present application, according to an aspect of the present application, it is characterized in that the first signaling and the second wireless signal are transmitted by the first antenna port group, respectively.
The method has the advantages that the first antenna port group has the highest receiving quality in the G antenna port groups, and the method improves the sending efficiency and the transmission reliability of the first signaling and the second wireless signals.
The application discloses a method in a base station for random access, which comprises the following steps:
-a. receiving a first wireless signal on a first air interface resource;
-step b. transmitting the first signaling in a first time window.
The first air interface resource is one air interface resource in a first uplink resource pool, and the first uplink resource pool comprises a positive integer of the air interface resources. One of the air interface resources comprises a time frequency resource and a characteristic sequence. The first uplink resource pool is one of G uplink resource pools, where G is a positive integer, and the uplink resource pool includes a positive integer of the air interface resources. The first signaling is physical layer signaling, an identification of the first signaling being associated with at least the latter of { an identification of the first empty resource, an index of the first uplink resource pool among the G uplink resource pools }. At least two RUs (Resource units) occupied by the uplink Resource pools in the G uplink Resource pools are overlapped. The RU occupies the duration of one wideband symbol in the time domain and one subcarrier in the frequency domain.
As one embodiment, the signature sequence comprises a pseudorandom sequence.
As an example, the signature sequence comprises a Zadoff-Chu sequence.
As an example, the signature sequence includes CP (Cyclic Prefix).
As an embodiment, the Physical layer CHannel corresponding to the air interface resource includes a PRACH (Physical random access CHannel).
As an embodiment, { identification of the first empty resource, index of the first uplink resource pool in the G uplink resource pools } at least the latter is used for generating identification of the first signaling. As a sub-embodiment, the identifier of the first air interface resource includes at least one of { a time domain resource occupied by the first air interface resource, a frequency domain resource occupied by the first air interface resource, and the signature sequence occupied by the first air interface resource }.
The above method has an advantage that by establishing a relationship between the identifier of the first signaling and at least the latter of { the identifier of the first air interface resource, the index of the first uplink resource pool in the G uplink resource pools }, the UE can determine whether the first signaling is for itself through the identifier of the first signaling, thereby reducing the complexity of subsequent processing.
As an embodiment, the identifier of the first signaling is used to determine at least one of { RS sequence of DMRS of the first signaling, CRC of the first signaling, scrambling sequence of CRC of the first signaling, time-frequency resources occupied by the first signaling }.
In one embodiment, the first wireless signal is generated by modulating the signature sequence corresponding to the first air interface resource.
As an embodiment, the identifier of the first signaling and the identifier of the first air interface resource are respectively non-negative integers.
As an embodiment, the first signaling is DCI (Downlink Control Information).
As an embodiment, the physical layer channel corresponding to the first signaling includes a downlink physical layer control channel (i.e., a downlink channel that can only be used for carrying physical layer control information). As a sub-embodiment, the first signaling is transmitted on a PDCCH (Physical Downlink Control Channel).
As an embodiment, the first time window includes a plurality of sub-time windows, and the base station transmits the first signaling in one of the sub-time windows in the plurality of sub-time windows.
As an embodiment, any two different air interface resources are orthogonal to each other. As a sub-embodiment, the time frequency resources corresponding to any two different air interface resources are mutually orthogonal, or any two different air interface resources correspond to the same time frequency resource and the mutually orthogonal characteristic sequence.
As an embodiment, the uplink resource pool includes a plurality of time units in a time domain. As a sub-embodiment, the time unit is the duration of one wideband symbol. As a sub-embodiment, the plurality of time units are discontinuous in the time domain. As a sub-embodiment, the plurality of time units are consecutive in the time domain.
As an embodiment, the uplink resource pool includes a plurality of frequency units in a frequency domain, and as a sub-embodiment, the frequency unit is a bandwidth occupied by one subcarrier. As a sub-embodiment, the plurality of frequency units are discontinuous in the frequency domain. As a sub-embodiment, the plurality of frequency units are contiguous in the frequency domain.
As an embodiment, a plurality of different air interface resources may be mapped to one time frequency resource through a plurality of different characteristic sequences.
As an embodiment, any two of the G uplink resource pools occupy the same RU and the signature sequences that are orthogonal to each other. The RU occupies one subcarrier in the frequency domain and one wideband symbol duration in the time domain. As a sub-embodiment, the duration of the one wideband symbol is the inverse of the subcarrier corresponding to the corresponding RU. As a sub-embodiment, the wideband symbol is one of { OFDM symbol, SC-FDMA symbol, SCMA symbol }.
As an embodiment of the present application, according to an aspect of the present application, the step B further includes the steps of:
-step b1. transmitting a second radio signal.
The first signaling comprises scheduling information of the second wireless signal, wherein the scheduling information comprises at least one of { occupied time domain resource, occupied frequency domain resource, occupied code domain resource, MCS, NDI, RV, HARQ process number }.
As one embodiment, the second wireless signal includes an RAR (Random Access Response).
The above method has an advantage that by establishing a link between the identity of the first signaling and at least the latter of { the identity of the first air interface resource, the first uplink resource pool indexes in the G uplink resource pools }, so that the UE can identify the second radio signal for itself through the identity of the first signaling, the complexity of reception of the second radio signal is reduced.
As an embodiment, the physical layer channel corresponding to the second wireless signal includes a downlink physical layer data channel (i.e. a downlink channel capable of carrying physical layer data). As a sub-embodiment, the second wireless signal is transmitted on a PDSCH (Physical Downlink Shared Channel).
As an embodiment, the transmission Channel corresponding to the second wireless signal is a DL-SCH (downlink shared Channel).
As an embodiment of the present application, according to an aspect of the present application, the step a further includes the steps of:
step A0. sending downstream information;
step A1. sending a downlink RS (Reference Signal).
Wherein the downlink information is used to determine at least one of { G antenna port groups, the G uplink resource pools, a correspondence between G antenna port groups and the G uplink resource pools }. The uplink resource pool comprises a positive integer of the air interface resources. The downlink RS comprises G RS ports, the G RS ports are respectively sent by the G antenna port groups, and the G antenna port groups correspond to the G uplink resource pools one by one. The first uplink resource pool is one of the G uplink resource pools, and the antenna port group corresponding to the first uplink resource pool is a first antenna port group.
As an embodiment, the downlink information is cell-common.
As an embodiment, the downlink information is indicated by higher layer signaling.
As an embodiment, the downlink information is indicated by physical layer signaling.
As an embodiment, the downlink RS is used by the UE to determine the first antenna port group from the G antenna port groups.
As an embodiment, the receiving quality of the RS port corresponding to the first antenna port group is higher than the receiving quality of the RS port corresponding to a given antenna port group, where the given antenna port group is any one of the antenna port groups in the G antenna port groups that is not equal to the first antenna port group.
As a sub-embodiment of the above-mentioned embodiments, the receiving Quality includes one or two of { RSRP (Reference Signal Received Power) }.
As an embodiment, the G RS ports are transmitted at different time intervals, respectively.
As an embodiment, the antenna port group includes 1 antenna port.
As an embodiment, the number of antenna ports in the antenna port group is greater than 1.
As an embodiment, any two different ones of the G antenna port groups cannot be assumed to be the same.
As a sub-embodiment of the foregoing embodiment, the antenna port is formed by superimposing a plurality of antennas through antenna Virtualization (Virtualization), and mapping coefficients of the plurality of antennas to the antenna port form a beamforming vector. The beamforming vectors corresponding to a first antenna port and a second antenna port, which belong to any two different antenna port groups of the G antenna port groups, cannot be assumed to be the same.
As a sub-embodiment of the foregoing embodiment, the UE cannot perform joint channel estimation by using reference signals transmitted by any two antenna port groups of the G antenna port groups.
The method has the advantage that the base station can obtain the information of the first antenna port group through the first air interface resource by establishing the one-to-one correspondence relationship between the G antenna port groups and the G uplink resource pools.
As an embodiment of the present application, according to an aspect of the present application, it is characterized in that the first signaling and the second wireless signal are transmitted by the first antenna port group, respectively.
The method has the advantages that the first antenna port group has the highest receiving quality in the G antenna port groups, and the method improves the sending efficiency and the transmission reliability of the first signaling and the second wireless signals.
The application discloses a user equipment for random access, which comprises the following modules:
a first processing module: for transmitting a first wireless signal on a first air interface resource;
a first receiving module: for monitoring the first signaling during the first time window.
The first air interface resource is one air interface resource in a first uplink resource pool, and the first uplink resource pool comprises a positive integer of the air interface resources. One of the air interface resources comprises a time frequency resource and a characteristic sequence. The first uplink resource pool is one of G uplink resource pools, where G is a positive integer, and the uplink resource pool includes a positive integer of the air interface resources. The first signaling is physical layer signaling, an identification of the first signaling being associated with at least the latter of { an identification of the first empty resource, an index of the first uplink resource pool among the G uplink resource pools }. At least two RUs (Resource units) occupied by the uplink Resource pools in the G uplink Resource pools are overlapped. The RU occupies the duration of one wideband symbol in the time domain and one subcarrier in the frequency domain.
As an embodiment, the first processing module is configured to select the first air interface resource from the first uplink resource pool by itself.
As an embodiment, the Physical layer CHannel corresponding to the air interface resource includes a PRACH (Physical random access CHannel).
As an embodiment, { identification of the first empty resource, index of the first uplink resource pool in the G uplink resource pools } at least the latter is used for generating identification of the first signaling. As a sub-embodiment, the identifier of the first air interface resource includes at least one of { a time domain resource occupied by the first air interface resource, a frequency domain resource occupied by the first air interface resource, and the signature sequence occupied by the first air interface resource }.
As an embodiment, the first signaling is DCI (Downlink Control Information).
As an embodiment, the first time window comprises a plurality of sub-time windows, and the first receiving module is configured to monitor the first signaling in the plurality of sub-time windows. As a sub-embodiment, the monitoring refers to receiving based on blind detection, that is, receiving signals in each of the sub-time windows and performing decoding operation, and if the decoding is determined to be correct according to the check bits, determining that the receiving is successful, otherwise, determining that the receiving is failed.
As an embodiment of the present application, the user equipment is characterized in that the first receiving module is further configured to receive a second wireless signal. The first signaling comprises scheduling information of the second wireless signal, wherein the scheduling information comprises at least one of { occupied time domain resource, occupied frequency domain resource, occupied code domain resource, MCS, NDI, RV, HARQ process number }.
As one embodiment, the second wireless signal includes an RAR (Random Access Response).
As an embodiment of the present application, the user equipment is characterized in that the first processing module is further configured to receive downlink information and a downlink RS (Reference Signal). Wherein the downlink information is used to determine at least one of { G antenna port groups, the G uplink resource pools, a correspondence between G antenna port groups and the G uplink resource pools }. The uplink resource pool comprises a positive integer of the air interface resources. The downlink RS comprises G RS ports, the G RS ports are respectively sent by the G antenna port groups, and the G antenna port groups correspond to the G uplink resource pools one by one. The first uplink resource pool is one of the G uplink resource pools, and the antenna port group corresponding to the first uplink resource pool is a first antenna port group.
As an embodiment, the downlink RS is used to determine the first antenna port group from the G antenna port groups.
As an embodiment, the receiving quality of the RS port corresponding to the first antenna port group is higher than the receiving quality of the RS port corresponding to a given antenna port group, where the given antenna port group is any one of the antenna port groups in the G antenna port groups that is not equal to the first antenna port group.
As an embodiment, the G RS ports are transmitted at different time intervals, respectively.
As an embodiment, any two different ones of the G antenna port groups cannot be assumed to be the same.
As an embodiment of the present application, in the user equipment, the first signaling and the second wireless signal are respectively transmitted by the first antenna port group.
The application discloses a base station device for random access, which comprises the following modules:
a second processing module: the first wireless signal is received on a first air interface resource;
a first sending module: for transmitting first signaling in a first time window.
The first air interface resource is one air interface resource in a first uplink resource pool, and the first uplink resource pool comprises a positive integer of the air interface resources. One of the air interface resources comprises a time frequency resource and a characteristic sequence. The first uplink resource pool is one of G uplink resource pools, where G is a positive integer, and the uplink resource pool includes a positive integer of the air interface resources. The first signaling is physical layer signaling, an identification of the first signaling being associated with at least the latter of { an identification of the first empty resource, an index of the first uplink resource pool among the G uplink resource pools }. At least two RUs (Resource units) occupied by the uplink Resource pools in the G uplink Resource pools are overlapped. The RU occupies the duration of one wideband symbol in the time domain and one subcarrier in the frequency domain.
As one embodiment, the signature sequence comprises a pseudorandom sequence.
As an embodiment, the Physical layer CHannel corresponding to the air interface resource includes a PRACH (Physical random access CHannel).
As an embodiment, the first signaling is DCI (Downlink Control Information).
As an embodiment, the first time window includes a plurality of sub-time windows, and the first sending module is configured to send the first signaling in one of the sub-time windows in the plurality of sub-time windows.
As an embodiment of the application, the base station device is characterized in that the first sending module is further configured to send a second wireless signal. The first signaling comprises scheduling information of the second wireless signal, wherein the scheduling information comprises at least one of { occupied time domain resource, occupied frequency domain resource, occupied code domain resource, MCS, NDI, RV, HARQ process number }.
As one embodiment, the second wireless signal includes an RAR (Random Access Response).
As an embodiment of the present application, the base station apparatus is further configured to send downlink information and a downlink RS (Reference Signal). Wherein the downlink information is used to determine at least one of { G antenna port groups, the G uplink resource pools, a correspondence between G antenna port groups and the G uplink resource pools }. The uplink resource pool comprises a positive integer of the air interface resources. The downlink RS comprises G RS ports, the G RS ports are respectively sent by the G antenna port groups, and the G antenna port groups correspond to the G uplink resource pools one by one. The first uplink resource pool is one of the G uplink resource pools, and the antenna port group corresponding to the first uplink resource pool is a first antenna port group.
As an embodiment, the downlink RS is used to determine the first antenna port group from the G antenna port groups.
As an embodiment, the G RS ports are transmitted at different time intervals, respectively.
As an embodiment, any two different ones of the G antenna port groups cannot be assumed to be the same.
As an embodiment of the present application, in the base station apparatus, the first signaling and the second wireless signal are respectively transmitted by the first antenna port group.
Compared with the traditional scheme, the method has the following advantages:
by establishing a one-to-one correspondence relationship between the G antenna port groups and the G uplink resource pools, the base station can obtain information of the antenna port group with the highest reception quality for each UE through the first empty resource, so that the RAR and the corresponding DCI can be transmitted by using multi-antenna beamforming, and the efficiency and reliability of the RA procedure are improved.
The base station sends RARs for different UEs at different time intervals by using different beamforming vectors, and simultaneously distinguishes the different beamforming vectors by using the DCI identifier, so that the UE only needs to receive RARs corresponding to its own related beamforming vectors, but does not need to receive RARs corresponding to its own unrelated beamforming vectors, thereby reducing the processing complexity of the UE.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 shows a flow diagram of wireless transmission according to an embodiment of the application;
FIG. 2 shows a schematic diagram of a first time window according to an embodiment of the present application;
fig. 3 shows a schematic diagram of resource mapping of G uplink resource pools in the time-frequency domain according to an embodiment of the present application;
fig. 4 is a diagram illustrating resource mapping of a downlink RS according to an embodiment of the present application;
fig. 5 shows a relationship between G antenna port groups and G uplink resource pools, and a schematic diagram of resource mapping of first signaling in a first time window according to an embodiment of the present application;
fig. 6 shows a mapping of a first empty resource in a first uplink resource pool, and a schematic diagram of a relationship between an identity of a first signaling and { an index of the first empty resource in G uplink resource pools }, according to an embodiment of the present application;
fig. 7 shows a block diagram of a processing device for use in a UE according to an embodiment of the present application;
fig. 8 shows a block diagram of a processing device for use in a base station according to an embodiment of the present application;
example 1
For N1, downlink information is sent in step S101; transmitting a downlink RS in step S102; receiving a first wireless signal on a first air interface resource in step S11; transmitting first signaling in a first time window in step S12; the second wireless signal is transmitted in step S13.
For U2, downlink information is received in step S201; receiving a downlink RS in step S202; transmitting a first wireless signal on the first air interface resource in step S21; monitoring the first signaling in a first time window in step S22; the second wireless signal is received in step S23.
In embodiment 1, the first air interface resource is one air interface resource in a first uplink resource pool, where the first uplink resource pool includes a positive integer of the air interface resources. One of the air interface resources comprises a time frequency resource and a characteristic sequence. The first uplink resource pool is one of G uplink resource pools, where G is a positive integer, and the uplink resource pool includes a positive integer of the air interface resources. The first signaling is physical layer signaling, an identification of the first signaling being associated with at least the latter of { an identification of the first empty resource, an index of the first uplink resource pool among the G uplink resource pools }. At least two RUs (resource units) occupied by the uplink resource pools in the G uplink resource pools are overlapped. The RU occupies the duration of one wideband symbol in the time domain and one subcarrier in the frequency domain. The first signaling comprises scheduling information of the second wireless signal, wherein the scheduling information comprises at least one of { occupied time domain resource, occupied frequency domain resource, occupied code domain resource, MCS, NDI, RV and HARQ process number }. The downlink information is used to determine at least one of { G antenna port groups, the G uplink resource pools, a correspondence between G antenna port groups and the G uplink resource pools }. The downlink RS comprises G RS ports, the G RS ports are respectively sent by the G antenna port groups, the G antenna port groups correspond to the G uplink resource pools one by one, and the antenna port group corresponding to the first uplink resource pool is a first antenna port group.
As sub-embodiment 1 of embodiment 1, the UE selects the first air interface resource from the first uplink resource pool by itself.
As sub-embodiment 2 of embodiment 1, the Physical layer CHannel corresponding to the air interface resource includes a PRACH (Physical Random Access CHannel).
As sub-embodiment 3 of embodiment 1, the first signaling is DCI (Downlink control information).
As sub-embodiment 4 of embodiment 1, the second wireless signal includes an RAR (Random access response).
As sub-embodiment 5 of embodiment 1, the downlink RS is used by the UE to determine the first antenna port group from the G antenna port groups.
As sub-embodiment 6 of embodiment 1, a reception quality of the RS port corresponding to the first antenna port group is higher than a reception quality of the RS port corresponding to a given antenna port group, where the given antenna port group is any one of the antenna port groups in the G antenna port groups that is not equal to the first antenna port group.
As sub-embodiment 7 of embodiment 1, any two different ones of the G antenna port groups cannot be assumed to be the same.
As sub-embodiment 8 of embodiment 1, the first signaling and the second wireless signal are transmitted by the first antenna port group, respectively.
Example 2
Example 2 illustrates a schematic diagram of a first time window in the present application, as shown in fig. 2.
In embodiment 2, the first time window occupies T consecutive time units in the time domain, T being a positive integer. The first time window comprises G1 sub-time windows. The boxes filled with diagonal lines in fig. 2 represent any one of the G1 sub-time windows.
As sub-embodiment 1 of embodiment 2, the time unit is a duration of one wideband symbol, and as sub-embodiment 1 of embodiment 2, the wideband symbol is one of { OFDM symbol, SC-FDMA symbol, SCMA symbol }.
As a sub-embodiment 2 of embodiment 2, the sub-time windows occupy a plurality of time units in the time domain.
As a sub-embodiment of sub-embodiment 2 of embodiment 2, the plurality of time units occupied by one of the sub-time windows are discontinuous.
As sub-embodiment 3 of embodiment 2, time domain resources occupied by any two different sub-time windows do not overlap with each other.
As a sub-embodiment 4 of the embodiment 2, the number of time units occupied by at least two of the G1 sub-time windows is different.
As sub-embodiment 5 of embodiment 2, the UE monitors the first signaling in said G1 sub-time windows.
As sub-embodiment 6 of embodiment 2, the base station sends the first signaling in one of the G1 sub-time windows.
Example 3
In embodiment 3, one of the uplink resource pools includes a positive integer number of air interface resources. One of the air interface resources comprises a time frequency resource and a characteristic sequence. In fig. 3, a grid with a number label represents one time-frequency resource, and the time-frequency resources with different labels are distributed continuously or discontinuously in the time-frequency domain, as shown in fig. 3.
As sub-embodiment 1 of embodiment 3, one of the time-frequency resources includes Q RUs (Resource units), where Q is a positive integer, and the RUs occupy one subcarrier in a frequency domain and occupy one duration of a wideband symbol in a time domain. As one sub-embodiment of sub-embodiment 1 of embodiment 3, the duration of the one wideband symbol is the inverse of the subcarrier corresponding to the respective RU. As one sub-embodiment of sub-embodiment 1 of embodiment 3, the wideband symbol is one of { OFDM symbol, SC-FDMA symbol, SCMA symbol }.
As sub-embodiment 2 of embodiment 3, the uplink resource pool includes a plurality of the time-frequency resources.
As a sub-embodiment of sub-embodiment 2 of embodiment 3, the time-frequency resources are discontinuous in a time domain, for example, the uplink resource pool includes the time-frequency resources with a reference number {1, 2, 9, 10 }.
As a sub-embodiment of sub-embodiment 2 of embodiment 3, the plurality of time-frequency resources are contiguous in time domain. For example, the uplink resource pool includes the time-frequency resources with the index {1, 2, 3, 4 }.
As a sub-embodiment of sub-embodiment 2 of embodiment 3, the plurality of time-frequency resources are discontinuous in the frequency domain. For example, the uplink resource pool includes the time-frequency resources with the index {1, 2, 17, 18 }.
As a sub-embodiment of sub-embodiment 2 of embodiment 3, the plurality of time-frequency resources are contiguous in the frequency domain. For example, the uplink resource pool includes the time-frequency resources with a number {1, 2, 5, 6 }.
As sub-embodiment 3 of embodiment 3, at least two of the G uplink resource pools occupy RUs that overlap.
As sub-embodiment 4 of embodiment 3, any two of the G uplink resource pools occupy the same RU and the signature sequences that are orthogonal to each other.
As sub-embodiment 5 of embodiment 3, the signature sequence comprises a pseudo-random sequence.
As sub-embodiment 6 of embodiment 3, the signature sequence comprises a Zadoff-Chu sequence.
As sub-embodiment 7 of embodiment 3, the signature sequence includes CP (Cyclic Prefix).
As sub-embodiment 8 of embodiment 3, multiple different air interface resources may be mapped onto one time frequency resource through multiple different feature sequences.
As sub-embodiment 9 of embodiment 3, any two different air interface resources are orthogonal to each other. As a sub-embodiment of sub-embodiment 9 of embodiment 3, the time-frequency resources corresponding to any two different air interface resources are mutually orthogonal, or any two different air interface resources correspond to the same time-frequency resource and the mutually orthogonal feature sequences.
Example 4
In embodiment 4, the downlink RS includes G RS ports, and the G RS ports are respectively transmitted by G antenna port groups. One of the RS ports occupies I consecutive time units in the time domain and occupies W frequency units in the frequency domain, and I and W are positive integers, respectively. Different RS ports occupy different I time units in the time domain. The small filled squares in FIG. 4 represent the RS port # G, where 1. ltoreq. g.ltoreq.G.
As sub-embodiment 1 of embodiment 4, the time unit occupies the duration of one wideband symbol in the time domain. As one sub-embodiment of sub-embodiment 1 of embodiment 4, the wideband symbol is one of { OFDM symbol, SC-FDMA symbol, SCMA symbol }.
As sub-embodiment 2 of embodiment 4, the frequency unit occupies one subcarrier in the frequency domain.
As sub-embodiment 3 of embodiment 4, the W frequency units occupied by one of the RS ports are discontinuous.
As a sub-embodiment of sub-embodiment 3 of embodiment 4, the W frequency units occupied by one of the RS ports occur at equal intervals in the frequency domain.
As a sub-embodiment of sub-embodiment 3 of embodiment 4, one of the RS ports is wideband (i.e., the system bandwidth is divided into a positive integer number of frequency domain regions, and one RS port appears in all frequency domain regions within the system bandwidth, and the bandwidth corresponding to the frequency domain region is equal to the difference of the frequencies of two adjacent frequency units of one RS port.
As sub-example 4 of example 4, said I is equal to 1.
As sub-example 5 of example 4, the I is greater than 1.
As sub-example 6 of example 4, W is greater than 1.
Example 5
Embodiment 5 illustrates a relationship between G antenna port groups and G uplink resource pools and a schematic diagram of resource mapping of a first signaling in a first time window in this application, as shown in fig. 5.
In embodiment 5, the G antenna port groups and the G uplink resource pools correspond to each other one to one, and G is a positive integer. The first uplink resource pool is one of the G uplink resource pools, and the antenna port group corresponding to the first uplink resource pool is a first antenna port group. The first time window comprises G1 sub-time windows, the G1 being a positive integer less than or equal to G. The G1 sub time windows are in one-to-one correspondence with G1 uplink resource pools, the G1 uplink resource pools belong to the G uplink resource pools, and the first uplink resource pool belongs to the G1 uplink resource pools. And the sub-time window corresponding to the first uplink resource pool is a first sub-time window, and the first signaling is sent in the first sub-time window.
As sub-embodiment 1 of embodiment 5, one of the antenna port groups includes one or more antenna ports.
As sub-embodiment 2 of embodiment 5, any two different ones of the G antenna port groups cannot be assumed to be the same.
As a sub-embodiment of sub-embodiment 2 of embodiment 5, the antenna port is formed by superimposing a plurality of antennas through antenna Virtualization (Virtualization), and mapping coefficients of the plurality of antennas to the antenna port form a beamforming vector. The beamforming vectors corresponding to a first antenna port and a second antenna port, which belong to any two different antenna port groups of the G antenna port groups, cannot be assumed to be the same.
As a sub-embodiment of sub-embodiment 2 of embodiment 5, the reference signals transmitted by any two of the antenna port groups in the G antenna port groups cannot be used to perform joint channel estimation.
As sub-embodiment 3 of embodiment 5, G RS ports are transmitted by the G antenna port groups at different time intervals, respectively.
As a sub-embodiment of sub-embodiment 3 of embodiment 5, the G RS ports are used to determine the first antenna port group from the G antenna port groups. The receiving quality of the RS port corresponding to the first antenna port group is higher than the receiving quality of the RS port corresponding to a given antenna port group, where the given antenna port group is any one of the antenna port groups in the G antenna port groups that is not equal to the first antenna port group. As a sub-embodiment, the reception Quality includes one or two of { RSRP (Reference Signal Received Power), RSRQ (Reference Signal Received Quality) }.
As sub-embodiment 4 of embodiment 5, the first signaling is sent by the first antenna port group in the first sub-time window.
Example 6
Embodiment 6 illustrates a mapping of a first air interface resource in a first uplink resource pool, and a schematic diagram of a relationship between an identifier of a first signaling and { the identifier of the first air interface resource, an index of the first uplink resource pool in G uplink resource pools } in this application, as shown in fig. 6.
In embodiment 6, the first uplink resource pool includes a positive integer number of air interface resources. One of the air interface resources comprises a time frequency resource and a characteristic sequence. One block in fig. 6 represents one such time-frequency resource. The first uplink resource pool includes a plurality of the time-frequency resources, and the plurality of the time-frequency resources are respectively continuous or discontinuous in a time-frequency domain, as shown in fig. 6. The first air interface resource is one of the air interface resources in the first uplink resource pool. The time frequency resource corresponding to the first air interface resource is represented by a box of a heavy solid line frame in fig. 6. The first uplink resource pool is one of G uplink resource pools, and G is a positive integer. An identification of the first signaling is associated with at least the latter of { an identification of the first air interface resource, an index of the first uplink resource pool in the G uplink resource pools }.
As sub-embodiment 1 of embodiment 6, at least the latter of { identification of the first air interface resource, indices of the first uplink resource pool in the G uplink resource pools } is used to generate the identification of the first signaling.
For a sub-embodiment of sub-embodiment 1 of embodiment 6, the identifier of the first air interface resource includes at least one of { a time domain resource occupied by the first air interface resource, a frequency domain resource occupied by the first air interface resource, and the signature sequence occupied by the first air interface resource }.
As a sub-embodiment of sub-embodiment 1 of embodiment 6, the identifier of the first signaling is a function of { id _1, id _2}, where id _1 is an index of the time-frequency resource corresponding to the first air interface resource in the plurality of time-frequency resources included in the first uplink resource pool, and id _2 is an index of the first uplink resource pool in the G uplink resource pools. As a sub-embodiment, the identifier of the first signaling is equal to a plus b times id _1, plus c times id _2, that is, the identifier of the first signaling is a + b × id _1+ c × id _2, where a, b, and c are fixed positive integers respectively.
As sub-embodiment 2 of embodiment 6, the identification of the first signaling is a non-negative integer.
As sub-embodiment 3 of embodiment 6, multiple air interface resources are mapped onto one time frequency resource through multiple feature sequences.
As sub-embodiment 4 of embodiment 6, the signature sequence comprises a pseudo-random sequence.
As sub-embodiment 5 of embodiment 6, the signature sequence comprises a Zadoff-Chu sequence.
As sub-embodiment 6 of embodiment 6, the signature sequence includes CP (Cyclic Prefix).
As sub-embodiment 7 of embodiment 6, any two different air interface resources are orthogonal to each other. As a sub-embodiment of sub-embodiment 7 of embodiment 6, the time-frequency resources corresponding to any two different air interface resources are mutually orthogonal, or any two different air interface resources correspond to the same time-frequency resource and the mutually orthogonal feature sequences.
Example 7
Embodiment 7 illustrates a block diagram of a processing apparatus used in a UE, as shown in fig. 7.
In fig. 7, the UE apparatus 200 is mainly composed of a first processing module 201 and a first receiving module 202.
The first processing module 201 is configured to send a first wireless signal on a first air interface resource; the first receiving module 202 is configured to monitor a first signaling in a first time window.
In embodiment 7, the first air interface resource is one air interface resource in a first uplink resource pool, where the first uplink resource pool includes a positive integer of the air interface resources. One of the air interface resources comprises a time frequency resource and a characteristic sequence. The first uplink resource pool is one of G uplink resource pools, where G is a positive integer, and the uplink resource pool includes a positive integer of the air interface resources. The first signaling is physical layer signaling, an identification of the first signaling being associated with at least the latter of { an identification of the first empty resource, an index of the first uplink resource pool among the G uplink resource pools }. At least two RUs (resource units) occupied by the uplink resource pools in the G uplink resource pools are overlapped. The RU occupies the duration of one wideband symbol in the time domain and one subcarrier in the frequency domain.
As sub-embodiment 1 of embodiment 7, the first receiving module 202 is further configured to receive a second wireless signal. The first signaling comprises scheduling information of the second wireless signal, wherein the scheduling information comprises at least one of { occupied time domain resource, occupied frequency domain resource, occupied code domain resource, MCS, NDI, RV, HARQ process number }.
As sub-embodiment 2 of embodiment 7, the first processing module 201 is further configured to receive downlink information and a downlink RS (Reference Signal). Wherein the downlink information is used to determine at least one of { G antenna port groups, the G uplink resource pools, a correspondence between G antenna port groups and the G uplink resource pools }. The uplink resource pool comprises a positive integer of the air interface resources. The downlink RS comprises G RS ports, the G RS ports are respectively sent by the G antenna port groups, and the G antenna port groups correspond to the G uplink resource pools one by one. The first uplink resource pool is one of the G uplink resource pools, and the antenna port group corresponding to the first uplink resource pool is a first antenna port group.
As sub-embodiment 3 of embodiment 7, the first signaling and the second wireless signal are transmitted by the first antenna port group, respectively.
Example 8
Embodiment 8 illustrates a block diagram of a processing apparatus used in a base station, as shown in fig. 8.
In fig. 8, the base station apparatus 300 is mainly composed of a second processing module 301 and a first transmitting module 302.
The second processing module 301 is configured to receive a first wireless signal on a first air interface resource; the first sending module 302 is configured to send first signaling in a first time window.
In embodiment 8, the first air interface resource is one air interface resource in a first uplink resource pool, where the first uplink resource pool includes a positive integer of the air interface resources. One of the air interface resources comprises a time frequency resource and a characteristic sequence. The first uplink resource pool is one of G uplink resource pools, where G is a positive integer, and the uplink resource pool includes a positive integer of the air interface resources. The first signaling is physical layer signaling, an identification of the first signaling being associated with at least the latter of { an identification of the first empty resource, an index of the first uplink resource pool among the G uplink resource pools }. At least two RUs (resource units) occupied by the uplink resource pools in the G uplink resource pools are overlapped. The RU occupies the duration of one wideband symbol in the time domain and one subcarrier in the frequency domain.
As sub-embodiment 1 of embodiment 8, the first sending module 302 is further configured to send a second wireless signal. The first signaling comprises scheduling information of the second wireless signal, wherein the scheduling information comprises at least one of { occupied time domain resource, occupied frequency domain resource, occupied code domain resource, MCS, NDI, RV, HARQ process number }.
As sub-embodiment 2 of embodiment 8, the second processing module 301 is further configured to send downlink information and a downlink RS (Reference Signal). Wherein the downlink information is used to determine at least one of { G antenna port groups, the G uplink resource pools, a correspondence between G antenna port groups and the G uplink resource pools }. The uplink resource pool comprises a positive integer of the air interface resources. The downlink RS comprises G RS ports, the G RS ports are respectively sent by the G antenna port groups, and the G antenna port groups correspond to the G uplink resource pools one by one. The first uplink resource pool is one of the G uplink resource pools, and the antenna port group corresponding to the first uplink resource pool is a first antenna port group.
As sub-embodiment 3 of embodiment 8, the first signaling and the second wireless signal are transmitted by the first antenna port group, respectively.
It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing relevant hardware through a program, and the program may be stored in a computer readable storage medium, such as a read-only memory, a hard disk or an optical disk. Alternatively, all or part of the steps of the above embodiments may be implemented by using one or more integrated circuits. Accordingly, the module units in the above embodiments may be implemented in a hardware form, or may be implemented in a form of software functional modules, and the present application is not limited to any specific form of combination of software and hardware. The UE or the terminal in the application includes but is not limited to a mobile phone, a tablet computer, a notebook, a network card, an NB-IOT terminal, an eMTC terminal and other wireless communication devices. The base station or system device in the present application includes, but is not limited to, a macro cell base station, a micro cell base station, a home base station, a relay base station, and other wireless communication devices.
The above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (12)
1. A method in a user equipment for random access, comprising the steps of:
-step a. transmitting a first wireless signal on a first air interface resource;
-step b. monitoring the first signalling in a first time window;
-step b1. receiving a second wireless signal;
the first air interface resource is one air interface resource in a first uplink resource pool, and the first uplink resource pool comprises a positive integer of the air interface resources; one of the air interface resources comprises a time frequency resource and a characteristic sequence; the first uplink resource pool is one of G uplink resource pools, where G is a positive integer, and the uplink resource pool includes a positive integer of the air interface resources; the first signaling is physical layer signaling, an identification of the first signaling being associated with at least the latter of { an identification of the first empty resource, an index of the first uplink resource pool among the G uplink resource pools }; the RUs occupied by at least two uplink resource pools in the G uplink resource pools are overlapped; the RU occupies the duration of a wideband symbol in the time domain and occupies a subcarrier in the frequency domain; the first signaling comprises scheduling information of the second wireless signal, wherein the scheduling information comprises at least one of { occupied time domain resource, occupied frequency domain resource, occupied code domain resource, MCS, NDI, RV and HARQ process number }; the physical layer channel corresponding to the first air interface resource comprises a PRACH, and the second wireless signal comprises a RAR.
2. The method of claim 1, wherein step a further comprises the steps of:
-step A0. receiving downstream information;
step A1, receiving a downlink RS;
wherein the downlink information is used to determine at least one of { G antenna port groups, the G uplink resource pools, a correspondence between G antenna port groups and the G uplink resource pools }; the uplink resource pool comprises a positive integer of the air interface resources; the downlink RS comprises G RS ports, the G RS ports are respectively sent by the G antenna port groups, and the G antenna port groups correspond to the G uplink resource pools one by one; the first uplink resource pool is one of the G uplink resource pools, and the antenna port group corresponding to the first uplink resource pool is a first antenna port group.
3. The method of claim 1 or 2, wherein the first signaling and the second wireless signal are transmitted by the first antenna port group respectively.
4. A method in a base station for random access, comprising the steps of:
-a. receiving a first wireless signal on a first air interface resource;
-step b. sending a first signalling in a first time window;
-step b1. transmitting a second wireless signal;
the first air interface resource is one air interface resource in a first uplink resource pool, and the first uplink resource pool comprises a positive integer of the air interface resources; one of the air interface resources comprises a time frequency resource and a characteristic sequence; the first uplink resource pool is one of G uplink resource pools, where G is a positive integer, and the uplink resource pool includes a positive integer of the air interface resources; the first signaling is physical layer signaling, an identification of the first signaling being associated with at least the latter of { an identification of the first empty resource, an index of the first uplink resource pool among the G uplink resource pools }; the RUs occupied by at least two uplink resource pools in the G uplink resource pools are overlapped; the RU occupies the duration of a wideband symbol in the time domain and occupies a subcarrier in the frequency domain; the first signaling comprises scheduling information of the second wireless signal, wherein the scheduling information comprises at least one of { occupied time domain resource, occupied frequency domain resource, occupied code domain resource, MCS, NDI, RV and HARQ process number }; the physical layer channel corresponding to the first air interface resource comprises a PRACH, and the second wireless signal comprises a RAR.
5. The method of claim 4, wherein step A further comprises the steps of:
step A0. sending downstream information;
step A1, sending a downlink RS;
wherein the downlink information is used to determine at least one of { G antenna port groups, the G uplink resource pools, a correspondence between G antenna port groups and the G uplink resource pools }; the uplink resource pool comprises a positive integer of the air interface resources; the downlink RS comprises G RS ports, the G RS ports are respectively sent by the G antenna port groups, and the G antenna port groups correspond to the G uplink resource pools one by one; the first uplink resource pool is one of the G uplink resource pools, and the antenna port group corresponding to the first uplink resource pool is a first antenna port group.
6. The method of claim 4 or 5, wherein the first signaling and the second wireless signal are transmitted by the first antenna port group respectively.
7. A user equipment for random access, comprising the following modules:
a first processing module: for transmitting a first wireless signal on a first air interface resource;
a first receiving module: the first wireless signal receiving unit is used for monitoring the first signaling in a first time window and receiving a second wireless signal;
the first air interface resource is one air interface resource in a first uplink resource pool, and the first uplink resource pool comprises a positive integer of the air interface resources; one of the air interface resources comprises a time frequency resource and a characteristic sequence; the first uplink resource pool is one of G uplink resource pools, where G is a positive integer, and the uplink resource pool includes a positive integer of the air interface resources; the first signaling is physical layer signaling, an identification of the first signaling being associated with at least the latter of { an identification of the first empty resource, an index of the first uplink resource pool among the G uplink resource pools }; the RUs occupied by at least two uplink resource pools in the G uplink resource pools are overlapped; the RU occupies the duration of a wideband symbol in the time domain and occupies a subcarrier in the frequency domain; the first signaling comprises scheduling information of the second wireless signal, wherein the scheduling information comprises at least one of { occupied time domain resource, occupied frequency domain resource, occupied code domain resource, MCS, NDI, RV and HARQ process number }; the physical layer channel corresponding to the first air interface resource comprises a PRACH, and the second wireless signal comprises a RAR.
8. The UE of claim 7, wherein the first processing module is further configured to receive downlink information and a downlink RS, wherein the downlink information is used to determine at least one of { G antenna port groups, the G uplink resource pools, a correspondence between G antenna port groups and the G uplink resource pools }; the uplink resource pool comprises a positive integer of the air interface resources; the downlink RS comprises G RS ports, the G RS ports are respectively sent by the G antenna port groups, and the G antenna port groups correspond to the G uplink resource pools one by one; the first uplink resource pool is one of the G uplink resource pools, and the antenna port group corresponding to the first uplink resource pool is a first antenna port group.
9. The UE of claim 7 or 8, wherein the first signaling and the second wireless signal are transmitted by the first antenna port group respectively.
10. A base station device for random access, comprising the following modules:
a second processing module: the first wireless signal is received on a first air interface resource;
a first sending module: for transmitting first signaling in a first time window and transmitting a second wireless signal;
the first air interface resource is one air interface resource in a first uplink resource pool, and the first uplink resource pool comprises a positive integer of the air interface resources; one of the air interface resources comprises a time frequency resource and a characteristic sequence; the first uplink resource pool is one of G uplink resource pools, where G is a positive integer, and the uplink resource pool includes a positive integer of the air interface resources; the first signaling is physical layer signaling, an identification of the first signaling being associated with at least the latter of { an identification of the first empty resource, an index of the first uplink resource pool among the G uplink resource pools }; the RUs occupied by at least two uplink resource pools in the G uplink resource pools are overlapped; the RU occupies the duration of a wideband symbol in the time domain and occupies a subcarrier in the frequency domain; the first signaling comprises scheduling information of the second wireless signal, wherein the scheduling information comprises at least one of { occupied time domain resource, occupied frequency domain resource, occupied code domain resource, MCS, NDI, RV and HARQ process number }; the physical layer channel corresponding to the first air interface resource comprises a PRACH, and the second wireless signal comprises a RAR.
11. The base station device of claim 10, wherein the second processing module is further configured to send downlink information and a downlink RS; wherein the downlink information is used to determine at least one of { G antenna port groups, the G uplink resource pools, a correspondence between G antenna port groups and the G uplink resource pools }; the uplink resource pool comprises a positive integer of the air interface resources; the downlink RS comprises G RS ports, the G RS ports are respectively sent by the G antenna port groups, and the G antenna port groups correspond to the G uplink resource pools one by one; the first uplink resource pool is one of the G uplink resource pools, and the antenna port group corresponding to the first uplink resource pool is a first antenna port group.
12. The base station device according to claim 10 or 11, wherein the first signaling and the second wireless signal are transmitted by the first antenna port group, respectively.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610871153.2A CN107888238B (en) | 2016-09-30 | 2016-09-30 | Method and device for UE (user equipment) and base station for random access |
| PCT/CN2017/100165 WO2018059185A1 (en) | 2016-09-30 | 2017-09-01 | Random access method and device utilized in user equipment and base station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610871153.2A CN107888238B (en) | 2016-09-30 | 2016-09-30 | Method and device for UE (user equipment) and base station for random access |
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| Publication Number | Publication Date |
|---|---|
| CN107888238A CN107888238A (en) | 2018-04-06 |
| CN107888238B true CN107888238B (en) | 2020-09-01 |
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| CN115767583A (en) * | 2018-04-09 | 2023-03-07 | 上海朗帛通信技术有限公司 | Method and device used in user equipment and base station for wireless communication |
| CN110891252B (en) * | 2018-09-10 | 2022-06-17 | 上海朗帛通信技术有限公司 | Method and apparatus in a node used for wireless communication |
| CN111147203B (en) | 2018-11-02 | 2021-08-27 | 上海朗帛通信技术有限公司 | Method and device used in user equipment and base station for wireless communication |
| CN111490861B (en) * | 2019-01-26 | 2022-05-24 | 上海朗帛通信技术有限公司 | Method and device used in user equipment and base station for wireless communication |
| WO2020191766A1 (en) * | 2019-03-28 | 2020-10-01 | Zte Corporation | Method for random access resource configuration and resource selection and performing rach |
| CN111769921B (en) * | 2019-04-02 | 2021-12-24 | 上海朗帛通信技术有限公司 | Method and apparatus in a node used for wireless communication |
| CN115226196B (en) | 2019-05-09 | 2024-06-07 | 荣耀终端有限公司 | Method and apparatus in a communication node for wireless communication |
| CN112312484B (en) * | 2019-07-26 | 2022-10-28 | 上海朗帛通信技术有限公司 | Method and apparatus in a node used for wireless communication |
| CN112350806B (en) * | 2019-08-08 | 2023-07-21 | 上海朗桦通信技术有限公司 | Method and apparatus in a node for wireless communication |
| CN112398611B (en) * | 2019-08-15 | 2022-09-27 | 上海朗帛通信技术有限公司 | Method and apparatus in a node used for wireless communication |
| CN112399581B (en) * | 2019-08-16 | 2022-09-27 | 上海朗帛通信技术有限公司 | Method and apparatus in a node used for wireless communication |
| WO2021056550A1 (en) * | 2019-09-29 | 2021-04-01 | 北京小米移动软件有限公司 | Beam failure request sending method and apparatus, and electronic device |
| CN114362904A (en) * | 2020-01-19 | 2022-04-15 | 上海朗帛通信技术有限公司 | Method and apparatus in a node used for wireless communication |
| WO2023019542A1 (en) * | 2021-08-20 | 2023-02-23 | Zte Corporation | Systems and methods for initial access |
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| CN105490719B (en) * | 2014-09-17 | 2020-11-24 | 中兴通讯股份有限公司 | Uplink synchronization method, device and system |
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| CN105637969A (en) * | 2013-10-14 | 2016-06-01 | 株式会社Kt | Method for transmitting and receiving random access preamble and device therefor |
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| WO2018059185A1 (en) | 2018-04-05 |
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