CN107872254B - 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 PDF

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Publication number
CN107872254B
CN107872254B CN201610856351.1A CN201610856351A CN107872254B CN 107872254 B CN107872254 B CN 107872254B CN 201610856351 A CN201610856351 A CN 201610856351A CN 107872254 B CN107872254 B CN 107872254B
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signaling
air interface
uplink resource
antenna port
time
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CN107872254A (en
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张晓博
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Honor Device Co Ltd
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Shanghai Langbo Communication Technology Co Ltd
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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
    • 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
    • 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
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0045—Arrangements at the receiver end
    • H04L1/0052—Realisations of complexity reduction techniques, e.g. pipelining or use of look-up tables
    • 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
    • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
    • 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
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming

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; receiving a first signaling; then monitoring the second signaling in the first time window; or refrain from monitoring for the second signaling in the first time window. Wherein the first signaling is physical layer signaling and the second signaling is physical layer signaling. The first signaling is used to determine whether the second signaling is sent in 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 number of air interface resources. One of the air interface resources comprises a time frequency resource and a characteristic sequence. The identifier of the second signaling is associated with the identifier of the first air interface resource.

Description

Method and device for UE (user equipment) and base station for random access
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; the base station sends RAR (Random Access response) to the 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, but the signaling identifier of the DCI (downlink Control information) signaling corresponding to the RAR in the existing system cannot reflect the used beamforming vector, the UE needs to monitor the DCI corresponding to multiple beamforming vectors, and may even need to receive the RAR corresponding to multiple beamforming vectors, although in practice, the UE only needs to monitor and receive the DCI and RAR corresponding to its own associated beamforming vector. This results in increased UE processing complexity.
The present invention discloses a solution to the above problems. 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 invention discloses a method for UE (user equipment) of random access, which comprises the following steps:
-step a. transmitting a first wireless signal on a first air interface resource;
-step b. receiving a first signalling;
-step c. monitoring the second signaling in a first time window; or refrain from monitoring for the second signaling in the first time window.
Wherein the first signaling is physical layer signaling and the second signaling is physical layer signaling. The first signaling is used to determine whether the second signaling is sent in 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 number of air interface resources. One of the air interface resources comprises a time frequency resource and a characteristic sequence. The identifier of the second signaling is associated with the identifier of the first air interface resource.
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, the identifier of the first air interface resource is used to generate the identifier of the second signaling. As a sub-embodiment, 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 } is used to determine the identifier of the second signaling. As a sub-embodiment, the identifier of the second signaling is used to determine at least one of a RS (Reference Signal) sequence of the DMRS (DeModulation Reference Signal) of the second signaling, a CRC (Cyclic Redundancy Check) of the second signaling, a scrambling sequence of the CRC of the second signaling, and a time-frequency resource occupied by the second 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 second signaling and the identifier of the first air interface resource are non-negative integers, respectively.
As an embodiment, the first signaling is cell-common.
As an embodiment, the first signaling is DCI (Downlink Control Information).
As an embodiment, the first signaling is sent M times in M time intervals, respectively, where M is greater than 1. As a sub-embodiment, the first signaling is sent by different antenna port groups in the M time intervals, where one antenna port group includes a positive integer number of antenna ports. As a sub-embodiment, the M is configurable.
In the above embodiment, different antenna port groups may point to different directions, so that UEs in different locations can successfully receive the first signaling.
As an embodiment, the first time window includes a plurality of sub-time windows, and the UE monitors the second signaling in the plurality of sub-time windows or abandons monitoring the second signaling in the plurality of sub-time windows.
According to the above embodiment, when the second signaling is not sent in the first time window, the UE may know, through the first signaling, that monitoring the second signaling in the multiple sub-time windows may be abandoned, thereby reducing the complexity of the UE
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 second signaling is DCI.
As an embodiment, the physical layer channel corresponding to the second 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 second signaling is transmitted on the PDCCH.
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 OFDM 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, one of the air interface resources includes one of the time frequency resources and one of the feature sequences having a length of Q, where the time frequency Resource includes Q RUs (Resource units), and Q is a positive integer. And one modulation symbol is mapped to the Q RUs after being multiplied by the characteristic sequence, namely the modulation symbol is transmitted on one air interface resource. As a sub-embodiment, the RU occupies the duration of one OFDM symbol in the time domain and one subcarrier 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.
Specifically, according to one aspect of the present invention, the method further comprises the following steps:
-step d. receiving a second radio signal on the first time-frequency resource.
Wherein the second signaling is transmitted in the first time window, the second signaling being used to determine the first time-frequency resource.
As one embodiment, the second wireless signal includes an RAR (Random Access Response).
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, the second signaling indicates at least one of { the first time-frequency resource, the MCS of the second wireless signal, the NDI of the second wireless signal, the RV of the second wireless signal, the HARQ process number of the second wireless signal }.
Specifically, according to an aspect of the present invention, the step a further includes the steps of:
step A0. receives the downstream information.
Wherein the downlink information is used to determine at least one of { G antenna port groups, G uplink resource pools, a correspondence between the G antenna port groups and the G uplink resource pools }. The first uplink resource pool is one of the G uplink resource pools. The uplink resource pool comprises a positive integer of the air interface resources. And G is a positive integer.
As an embodiment, the first signaling is sent M times in M time intervals, respectively, the M being independent of the G.
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, any two of the G uplink resource pools are orthogonal (i.e. do not overlap) in the time domain.
As an embodiment, any two of the G uplink resource pools are orthogonal (i.e. do not overlap) in the frequency domain.
As an embodiment, any two of the G uplink Resource pools do not share an RU (Resource Unit). 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, any two of the G uplink resource pools include the same signature sequence(s).
As an embodiment, any two of the G uplink resource pools occupy the same RU(s) and the signature sequences that are orthogonal to each other.
Specifically, according to an aspect of the present invention, the step a further includes the steps of:
step A1. receiving a downlink RS (Reference Signal).
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 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.
In particular, according to one aspect of the invention, it is characterized in that said first signaling is transmitted on a first carrier and at least one of { said second signaling, said first radio signal } is transmitted on a second carrier. The first carrier and the second carrier are orthogonal in the frequency domain.
As one embodiment, a center frequency of the first carrier is lower than a center frequency of the second carrier. As a sub-embodiment, the center frequency of the first carrier wave is between 0.1GHz and 3.5 GHz. As a sub-embodiment, the center frequency of the second carrier is greater than or equal to 6 GHz.
As an embodiment, the bandwidth of the second carrier is wider than the bandwidth of the first carrier.
As an embodiment, the downlink RS is transmitted on the second carrier.
As an embodiment, the downlink information is transmitted on the first carrier, and the downlink information is further used to indicate the second carrier.
As an embodiment, the downlink information is transmitted on the second carrier, and the downlink information is further used to indicate the first carrier.
As one embodiment, the first signature sequence is transmitted on the second carrier.
Specifically, according to an aspect of the present invention, the second signaling and the first wireless signal are respectively transmitted by the first antenna port group.
Specifically, according to one aspect of the present invention, the first signaling indicates G1 uplink resource pools. If the first uplink resource pool belongs to the G1 uplink resource pools, the UE monitors the second signaling in the first time window; otherwise, the UE abandons monitoring the second signaling in the first time window. Wherein G1 is a positive integer.
As an embodiment, the G1 uplink resource pools belong to the G uplink resource pools, and the G1 is less than or equal to the G.
As an embodiment, the first signaling is sent M times in M time intervals, respectively, where M is independent of the G1. As a sub-embodiment, the first signaling is sent by different antenna port groups in the M time intervals, where one antenna port group includes a positive integer number of antenna ports.
In the above embodiment, different antenna port groups may use different beamforming vectors to point to different directions, so that UEs in different positions can successfully receive the first signaling.
As an embodiment, the first time window comprises G1 sub-time windows, the UE monitors the second signaling in the G1 sub-time windows, or refrains from monitoring the second signaling in the G1 sub-time windows.
As a sub-embodiment of the foregoing embodiment, the G1 sub-time windows correspond to the G1 uplink resource pools one to one. The first signaling is used to determine a correspondence between the G1 sub time windows and the G1 uplink resource pools.
In the foregoing sub-embodiment, the UE only needs to monitor the second signaling in the sub-time window corresponding to the first uplink resource pool, so that the complexity of the UE is further reduced.
The invention discloses a method used in a base station of random access, which comprises the following steps:
-a. receiving a first wireless signal on a first air interface resource;
-step b. sending a first signalling;
-step c. sending a second signaling in a first time window; or abandoning to send the second signaling in the first time window.
Wherein the first signaling is physical layer signaling and the second signaling is physical layer signaling. The first signaling is used to determine whether the second signaling is sent in 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 number of air interface resources. One of the air interface resources comprises a time frequency resource and a characteristic sequence. The identifier of the second signaling is associated with the identifier of the first air interface resource.
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, the identifier of the first air interface resource is used to generate the identifier of the second signaling. As a sub-embodiment, 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 } is used to determine the identifier of the second signaling. As a sub-embodiment, the identifier of the second signaling is used to determine at least one of { RS sequence of DMRS of the second signaling, CRC of the second signaling, scrambling sequence of CRC of the second signaling, time-frequency resources occupied by the second 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 second signaling and the identifier of the first air interface resource are non-negative integers, respectively.
As an embodiment, the first signaling is cell-common.
As an embodiment, the first signaling is DCI (Downlink Control Information).
As an embodiment, the first signaling is sent M times in M time intervals, respectively, where M is greater than 1. As a sub-embodiment, the first signaling is sent by different antenna port groups in the M time intervals, where one antenna port group includes a positive integer number of antenna ports. As a sub-embodiment, the M is configurable.
In the above embodiment, different antenna port groups may point to different directions, so that UEs in different locations can successfully receive the first signaling.
As an embodiment, the first time window includes a plurality of sub-time windows, and the base station transmits the second signaling in one of the sub-time windows, or abandons to transmit the second signaling in the sub-time windows.
According to the above embodiment, in the case that the second signaling is not sent in the first time window, the base station may notify the UE through the first signaling to abandon monitoring of the second signaling in the plurality of sub-time windows, which reduces the complexity of the UE.
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 second signaling is DCI.
As an embodiment, the physical layer channel corresponding to the second 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 second signaling is transmitted on the PDCCH.
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 OFDM 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, one of the air interface resources includes one of the time frequency resources and one of the feature sequences having a length of Q, where the time frequency Resource includes Q RUs (Resource units), and Q is a positive integer. And one modulation symbol is mapped to the Q RUs after being multiplied by the characteristic sequence, namely the modulation symbol is transmitted on one air interface resource. As a sub-embodiment, the RU occupies the duration of one OFDM symbol in the time domain and one subcarrier 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.
Specifically, according to one aspect of the present invention, the method further comprises the following steps:
-step d. transmitting the second radio signal on the first time-frequency resource.
Wherein the second signaling is transmitted in the first time window, the second signaling being used to determine the first time-frequency resource.
As one embodiment, the second wireless signal includes an RAR (Random Access Response).
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, the second signaling indicates at least one of { the first time-frequency resource, the MCS of the second wireless signal, the NDI of the second wireless signal, the RV of the second wireless signal, the HARQ process number of the second wireless signal }.
Specifically, according to an aspect of the present invention, the step a further includes the steps of:
step A0. sends downstream information.
Wherein the downlink information is used to determine at least one of { G antenna port groups, G uplink resource pools, a correspondence between the G antenna port groups and the G uplink resource pools }. The first uplink resource pool is one of the G uplink resource pools. The uplink resource pool comprises a positive integer of the air interface resources. And G is a positive integer.
As an embodiment, the first signaling is sent M times in M time intervals, respectively, the M being independent of the G.
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, any two of the G uplink resource pools are orthogonal (i.e. do not overlap) in the time domain.
As an embodiment, any two of the G uplink resource pools are orthogonal (i.e. do not overlap) in the frequency domain.
As an embodiment, any two of the G uplink Resource pools do not share an RU (Resource Unit). 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, any two of the G uplink resource pools include the same signature sequence(s).
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.
Specifically, according to an aspect of the present invention, the step a further includes the steps of:
step A1. sending a downlink RS (Reference Signal).
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 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 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.
In particular, according to one aspect of the invention, it is characterized in that said first signaling is transmitted on a first carrier and at least one of { said second signaling, said first radio signal } is transmitted on a second carrier. The first carrier and the second carrier are orthogonal in the frequency domain.
As one embodiment, a center frequency of the first carrier is lower than a center frequency of the second carrier. As a sub-embodiment, the center frequency of the first carrier wave is between 0.1GHz and 3.5 GHz. As a sub-embodiment, the center frequency of the second carrier is greater than or equal to 6 GHz.
As an embodiment, the bandwidth of the second carrier is wider than the bandwidth of the first carrier.
As an embodiment, the downlink RS is transmitted on the second carrier.
As an embodiment, the downlink information is transmitted on the first carrier, and the downlink information is further used to indicate the second carrier.
As an embodiment, the downlink information is transmitted on the second carrier, and the downlink information is further used to indicate the first carrier.
As one embodiment, the first signature sequence is transmitted on the second carrier.
Specifically, according to an aspect of the present invention, the second signaling and the first wireless signal are respectively transmitted by the first antenna port group.
Specifically, according to one aspect of the present invention, the first signaling indicates G1 uplink resource pools. If the first uplink resource pool belongs to the G1 uplink resource pools, the base station sends the second signaling in the first time window; otherwise, the base station abandons the sending of the second signaling in the first time window. Wherein G1 is a positive integer.
For an embodiment, the G1 uplink resource pools belong to the G uplink resource pools, wherein the G1 is less than or equal to the G.
As an embodiment, the first signaling is sent M times in M time intervals, respectively, where M is independent of the G1. As a sub-embodiment, the first signaling is sent by different antenna port groups in the M time intervals, where one antenna port group includes a positive integer number of antenna ports.
In the above embodiment, different antenna port groups may use different beamforming vectors to point to different directions, so that UEs in different positions can successfully receive the first signaling.
As an embodiment, the first time window includes G1 sub time windows, and the base station transmits the second signaling in one of the G1 sub time windows, or abandons transmitting the second signaling in the G1 sub time windows.
As a sub-embodiment of the foregoing embodiment, the G1 sub-time windows correspond to the G1 uplink resource pools one to one. The first signaling is used to determine a correspondence between the G1 sub time windows and the G1 uplink resource pools.
The invention discloses 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 receiving a first signaling;
a second receiving module: for monitoring the second signaling in the first time window; or refrain from monitoring for the second signaling in the first time window.
Wherein the first signaling is physical layer signaling and the second signaling is physical layer signaling. The first signaling is used to determine whether the second signaling is sent in 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 number of air interface resources. One of the air interface resources comprises a time frequency resource and a characteristic sequence. The identifier of the second signaling is associated with the identifier of the first air interface resource.
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, the identifier of the first air interface resource is used to generate the identifier of the second signaling. As a sub-embodiment, 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 } is used to determine the identifier of the second signaling. As a sub-embodiment, the identifier of the second signaling is used to determine at least one of { RS sequence of DMRS of the second signaling, CRC of the second signaling, scrambling sequence of CRC of the second signaling, time-frequency resources occupied by the second signaling }.
As an embodiment, the first signaling is cell-common.
As an embodiment, the first signaling is DCI (Downlink Control Information).
As an embodiment, the first signaling is sent M times in M time intervals, respectively, where M is greater than 1. As a sub-embodiment, the first signaling is sent by different antenna port groups in the M time intervals, where one antenna port group includes a positive integer number of antenna ports. As a sub-embodiment, the M is configurable.
As an embodiment, the first time window includes a plurality of sub-time windows, and the second receiving module monitors the second signaling in the plurality of sub-time windows or abandons monitoring the second signaling in the plurality of sub-time windows.
As an embodiment, the second signaling is DCI.
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.
Specifically, the user equipment is characterized in that the first processing module is further configured to receive downlink information.
Wherein the downlink information is used to determine at least one of { G antenna port groups, G uplink resource pools, a correspondence between the G antenna port groups and the G uplink resource pools }. The first uplink resource pool is one of the G uplink resource pools. The uplink resource pool comprises a positive integer of the air interface resources. And G is a positive integer.
As an embodiment, the first signaling is sent M times in M time intervals, respectively, the M being independent of the G.
As an embodiment, the downlink information is cell-common.
Specifically, the ue is characterized in that the first processing module is further configured to receive a downlink RS (reference signal).
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 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 an embodiment, any two different ones of the G antenna port groups cannot be assumed to be the same.
Specifically, the ue may be configured to transmit the first signaling on a first carrier, and transmit at least one of the second signaling and the first radio signal on a second carrier. The first carrier and the second carrier are orthogonal in the frequency domain.
As one embodiment, a center frequency of the first carrier is lower than a center frequency of the second carrier. As a sub-embodiment, the center frequency of the first carrier wave is between 0.1GHz and 3.5 GHz. As a sub-embodiment, the center frequency of the second carrier is greater than or equal to 6 GHz.
Specifically, the ue is characterized in that the second signaling and the first wireless signal are respectively sent by the first antenna port group.
Specifically, the ue is characterized in that the first signaling indicates G1 uplink resource pools. If the first uplink resource pool belongs to the G1 uplink resource pools, the second receiving module monitors the second signaling in the first time window; otherwise, the second receiving module abandons monitoring the second signaling in the first time window. Wherein G1 is a positive integer.
As an embodiment, the G1 uplink resource pools belong to the G uplink resource pools, and the G1 is less than or equal to the G.
As an embodiment, the first signaling is sent M times in M time intervals, respectively, where M is independent of the G1.
Specifically, the user equipment is characterized by further comprising the following modules:
a third receiving module: for receiving a second wireless signal on the first time-frequency resource.
Wherein the second signaling is transmitted in the first time window, the second signaling being used to determine the first time-frequency resource.
As one embodiment, the second wireless signal includes an RAR (Random Access Response).
As an embodiment, the second signaling indicates at least one of { the first time-frequency resource, the MCS of the second wireless signal, the NDI of the second wireless signal, the RV of the second wireless signal, the HARQ process number of the second wireless signal }.
The invention discloses base station equipment 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 a first signaling;
a second sending module: for transmitting second signaling in the first time window; or abandoning to send the second signaling in the first time window.
Wherein the first signaling is physical layer signaling and the second signaling is physical layer signaling. The first signaling is used to determine whether the second signaling is sent in 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 number of air interface resources. One of the air interface resources comprises a time frequency resource and a characteristic sequence. The identifier of the second signaling is associated with the identifier of the first air interface resource.
As an embodiment, the first signaling is cell-common.
As an embodiment, the second signaling is DCI.
Specifically, the base station device is characterized in that the second processing module is further configured to send downlink information.
Wherein the downlink information is used to determine at least one of { G antenna port groups, G uplink resource pools, a correspondence between the G antenna port groups and the G uplink resource pools }. The first uplink resource pool is one of the G uplink resource pools. The uplink resource pool comprises a positive integer of the air interface resources. And G is a positive integer.
As an embodiment, the first signaling is sent M times in M time intervals, respectively, the M being independent of the G.
As an embodiment, the downlink information is cell-common.
Specifically, the base station device is characterized in that the second processing module is further configured to send a downlink RS (Reference Signal).
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 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 an embodiment, any two different ones of the G antenna port groups cannot be assumed to be the same.
Specifically, the base station apparatus may be configured such that the first signaling is transmitted on a first carrier, and at least one of the { the second signaling, the first radio signal } is transmitted on a second carrier. The first carrier and the second carrier are orthogonal in the frequency domain.
As one embodiment, a center frequency of the first carrier is lower than a center frequency of the second carrier. As a sub-embodiment, the center frequency of the first carrier wave is between 0.1GHz and 3.5 GHz. As a sub-embodiment, the center frequency of the second carrier is greater than or equal to 6 GHz.
Specifically, the base station device may be configured to send the second signaling and the first wireless signal by the first antenna port group, respectively.
Specifically, the base station device is characterized in that the first signaling indicates G1 uplink resource pools. If the first uplink resource pool belongs to the G1 uplink resource pools, the second sending module sends the second signaling in the first time window; otherwise, the second sending module abandons sending the second signaling in the first time window. Wherein G1 is a positive integer.
For an embodiment, the G1 uplink resource pools belong to the G uplink resource pools, wherein the G1 is less than or equal to the G.
As an embodiment, the first signaling is sent M times in M time intervals, respectively, where M is independent of the G1.
Specifically, the base station device is characterized by further including the following modules:
a third sending module: for transmitting the second wireless signal on the first time-frequency resource.
Wherein the second signaling is transmitted in the first time window, the second signaling being used to determine the first time-frequency resource.
As one embodiment, the second wireless signal includes an RAR (Random Access Response).
As an embodiment, the second signaling indicates at least one of { the first time-frequency resource, the MCS of the second wireless signal, the NDI of the second wireless signal, the RV of the second wireless signal, the HARQ process number of the second wireless signal }.
Compared with the traditional scheme, the invention has the following advantages:
support the base station to send RAR and corresponding DCI using multi-antenna beamforming, which improves the efficiency and reliability of the RA procedure.
Whether the UE needs to monitor the DCI corresponding to the RAR in the first time window is indicated by using the first signaling, which reduces the complexity of the UE.
The base station uses different beamforming vectors to send DCI for different UEs in different sub-time windows, and uses the first signaling to instruct a UE to monitor DCI only in the sub-time window corresponding to its related beamforming vector, thereby further reducing the complexity of the UE.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
fig. 1 shows a flow diagram of wireless transmission according to an embodiment of the invention;
FIG. 2 shows a schematic diagram of a first time window according to an embodiment of the invention;
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 invention;
fig. 4 is a diagram illustrating a resource mapping of a downlink RS according to an embodiment of the present invention;
fig. 5 shows a block diagram of a processing device used in a UE according to an embodiment of the invention;
fig. 6 shows a block diagram of a processing device for use in a base station according to an embodiment of the invention;
example 1
Embodiment 1 illustrates a flow chart of wireless transmission, as shown in fig. 1. In fig. 1, base station N1 is the serving cell maintenance base station for UE U2. In fig. 1, the steps in block F1, block F2, and block F3, respectively, are optional.
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 a first signaling in step S12; transmitting a second signaling in a first time window in step S103; in step S104, a second wireless signal is transmitted on the first time/frequency resource.
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; receiving a first signaling in step S22; monitoring the second signaling in a first time window in step S203; in step S204, a second wireless signal is received on the first time-frequency resource.
In embodiment 1, the first signaling is physical layer signaling and the second signaling is physical layer signaling. The first signaling is used to determine whether the second signaling is sent in 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 number of air interface resources. One of the air interface resources comprises a time frequency resource and a characteristic sequence. The identification of the second signaling is associated with the identification of the first air interface resource, and the second signaling is used for determining the first time-frequency resource. The downlink information is used to determine at least one of { G antenna port groups, G uplink resource pools, a correspondence between the G antenna port groups and the G uplink resource pools }. The first uplink resource pool is one of the G uplink resource pools. The uplink resource pool comprises a positive integer of the air interface resources, and G is a positive integer. 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. 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 identifier of the first air interface resource is used to generate the identifier of the second signaling. As a sub-embodiment of sub-embodiment 3 of embodiment 1, 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 } is used to determine the identifier of the second signaling. As a sub-embodiment of sub-embodiment 3 of embodiment 1, the identifier of the second signaling is used to determine at least one of { an RS sequence of the DMRS of the second signaling, a CRC of the second signaling, a scrambling sequence of the CRC of the second signaling, and a time-frequency resource occupied by the second signaling }.
As sub-embodiment 4 of embodiment 1, the first signaling is cell common.
As sub-embodiment 5 of embodiment 1, the first signaling is sent M times in M time intervals, respectively, where M is greater than 1, and M is independent of G. As a sub-embodiment of sub-embodiment 5 of embodiment 1, the first signaling is sent by different antenna port groups in the M time intervals, and one antenna port group includes a positive integer number of antenna ports. As a sub-embodiment of sub-embodiment 5 of embodiment 1, the M is configurable.
As sub-embodiment 6 of embodiment 1, the second signaling is DCI.
As sub-embodiment 7 of embodiment 1, any two different air interface resources are orthogonal to each other.
As sub-embodiment 8 of embodiment 1, the second wireless signal includes an RAR (Random access response).
As sub-embodiment 9 of embodiment 1, the downlink information is cell-common.
As sub-embodiment 10 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 11 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 a sub-embodiment of sub-embodiment 11 of embodiment 1, the reception quality includes one or two of { RSRP (referred Signal Received Power), RSRQ (referred Signal Received quality) }.
As sub-embodiment 12 of embodiment 1, any two different ones of the G antenna port groups cannot be assumed to be the same.
As a sub-embodiment of sub-embodiment 12 of embodiment 1, 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 12 of embodiment 1, the UE cannot perform joint channel estimation using reference signals transmitted by any two of the antenna port groups of the G antenna port groups.
As sub-embodiment 13 of embodiment 1, at least one of the first signaling transmitted on a first carrier and the { the second signaling, the first radio signal } transmitted on a second carrier. The first carrier and the second carrier are orthogonal in the frequency domain.
As a sub-embodiment of sub-embodiment 13 of embodiment 1, the center frequency of the first carrier is lower than the center frequency of the second carrier. As a sub-embodiment, the center frequency of the first carrier wave is between 0.1GHz and 3.5 GHz. As a sub-embodiment, the center frequency of the second carrier is greater than or equal to 6 GHz.
As sub-embodiment 14 of embodiment 1, the second signaling and the first wireless signal are transmitted by the first antenna port group, respectively.
As sub-embodiment 15 of embodiment 1, the first signaling indicates G1 uplink resource pools. If the first uplink resource pool belongs to the G1 uplink resource pools, the UE monitors the second signaling in the first time window; otherwise, the UE abandons monitoring the second signaling in the first time window. Wherein G1 is a positive integer.
As a sub-embodiment of sub-embodiment 15 of embodiment 1, the G1 uplink resource pools belong to the G uplink resource pools, and the G1 is less than or equal to the G.
As a sub-embodiment of sub-embodiment 15 of embodiment 1, the first time window includes G1 sub-time windows, and the G1 sub-time windows and the G1 uplink resource pools are in one-to-one correspondence. The first signaling is used to determine a correspondence between the G1 sub time windows and the G1 uplink resource pools.
As a sub-embodiment of sub-embodiment 15 of embodiment 1, the first signaling is sent M times in M time intervals, respectively, the M being independent of the G1.
Example 2
Example 2 illustrates a schematic diagram of a first time window in the present invention, 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 G1 being a positive integer. 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 sub-embodiment 2 of embodiment 2, the sub-time windows occupy T1 time units in the time domain, and T1 is a positive integer less than or equal to T.
As a sub-embodiment of sub-embodiment 2 of embodiment 2, the T1 time units 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 embodiment 2, the G1 sub time windows correspond to G1 uplink resource pools one to one, and the first signaling is used to determine the correspondence between the G1 sub time windows and the G1 uplink resource pools.
Example 3
Embodiment 3 illustrates a schematic diagram of resource mapping of G uplink resource pools in the time-frequency domain in the present invention, as shown in fig. 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 a sub-embodiment 3 of the embodiment 3, any two of the G uplink resource pools are orthogonal (i.e. do not overlap) in the time domain.
As a sub-embodiment 4 of embodiment 3, any two of the G uplink resource pools are orthogonal (i.e., do not overlap) in the frequency domain.
As sub-embodiment 5 of embodiment 3, any two of the G uplink resource pools do not share an RU. The RU occupies one subcarrier in the frequency domain and one wideband symbol duration in the time domain.
As sub-embodiment 6 of embodiment 3, any two of the G uplink resource pools include the same signature sequence(s).
As sub-embodiment 7 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 8 of embodiment 3, the signature sequence comprises a pseudo-random sequence.
As sub-embodiment 9 of embodiment 3, the signature sequence comprises a Zadoff-Chu sequence.
As sub-embodiment 10 of embodiment 3, the signature sequence includes CP (Cyclic Prefix).
As a sub-embodiment 11 of embodiment 3, multiple different air interface resources may be mapped to one time frequency resource through multiple different characteristic sequences.
As a sub-embodiment 12 of embodiment 3, any two different air interface resources are orthogonal to each other. As a sub-embodiment of the sub-embodiment 12 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
Embodiment 4 illustrates a schematic diagram of resource mapping of a downlink RS in the present invention, as shown in fig. 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 block diagram of a processing apparatus used in a UE, as shown in fig. 5.
In fig. 5, the UE apparatus 200 mainly includes a first processing module 201, a first receiving module 202, a second receiving module 203, and a third receiving module 204.
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 receive a first signaling; the second receiving module 203 is configured to monitor the second signaling in the first time window; the third receiving module 204 is configured to receive a second wireless signal on the first time-frequency resource.
In embodiment 5, the first signaling is physical layer signaling and the second signaling is physical layer signaling. The first signaling is used to determine whether the second signaling is sent in 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 number of air interface resources. One of the air interface resources comprises a time frequency resource and a characteristic sequence. The identifier of the second signaling is associated with the identifier of the first air interface resource. The second signaling is used to determine the first time-frequency resource.
As sub-embodiment 1 of embodiment 5, the first processing module 201 is further configured to receive downlink information. Wherein the downlink information is used to determine at least one of { G antenna port groups, G uplink resource pools, a correspondence between the G antenna port groups and the G uplink resource pools }. The first uplink resource pool is one of the G uplink resource pools. The uplink resource pool comprises a positive integer of the air interface resources. And G is a positive integer.
As a sub-embodiment 2 of the embodiment 5, the first processing module 201 is further configured to receive a downlink RS (reference signal). 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 5, at least one of the first signaling transmitted on a first carrier and the { the second signaling, the first radio signal } transmitted on a second carrier. The first carrier and the second carrier are orthogonal in the frequency domain.
As sub-embodiment 4 of embodiment 5, the second signaling and the first wireless signal are transmitted by the first antenna port group, respectively.
As sub-embodiment 5 of embodiment 5, the first signaling indicates G1 uplink resource pools. If the first uplink resource pool belongs to the G1 uplink resource pools, the second receiving module 203 monitors the second signaling in the first time window; otherwise, the second receiving module 203 abandons monitoring the second signaling in the first time window. Wherein G1 is a positive integer.
Example 6
Embodiment 6 illustrates a block diagram of a processing apparatus used in a base station, as shown in fig. 6.
In fig. 6, the base station apparatus 300 mainly includes a second processing module 301, a first transmitting module 302, a second transmitting module 303, and a third transmitting module 304.
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 a first signaling; the second sending module 303 is configured to send a second signaling in the first time window; the third transmitting module 304 is configured to transmit the second wireless signal on the first time-frequency resource.
In embodiment 6, the first signaling is physical layer signaling and the second signaling is physical layer signaling. The first signaling is used to determine whether the second signaling is sent in 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 number of air interface resources. One of the air interface resources comprises a time frequency resource and a characteristic sequence. The identifier of the second signaling is associated with the identifier of the first air interface resource. The second signaling is used to determine the first time-frequency resource.
As sub-embodiment 1 of embodiment 6, the second processing module 301 is further configured to send downlink information. Wherein the downlink information is used to determine at least one of { G antenna port groups, G uplink resource pools, a correspondence between the G antenna port groups and the G uplink resource pools }. The first uplink resource pool is one of the G uplink resource pools. The uplink resource pool comprises a positive integer of the air interface resources. And G is a positive integer.
As a sub-embodiment 2 of the embodiment 6, the second processing module 301 is further configured to send a downlink RS (reference signal). 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 6, at least one of the first signaling transmitted on a first carrier and the { the second signaling, the first radio signal } transmitted on a second carrier. The first carrier and the second carrier are orthogonal in the frequency domain.
As sub-embodiment 4 of embodiment 6, the second signaling and the first wireless signal are transmitted by the first antenna port group, respectively.
As sub-embodiment 5 of embodiment 6, the first signaling indicates G1 uplink resource pools. If the first uplink resource pool belongs to the G1 uplink resource pools, the second sending module 303 sends the second signaling in the first time window; otherwise, the second sending module 303 abandons sending the second signaling in the first time window. Wherein G1 is a positive integer.
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 invention includes but is not limited to wireless communication equipment such as a mobile phone, a tablet computer, a notebook, a network card, an NB-IOT terminal, an eMTC terminal and the like. The base station or system device in the present invention 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 invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (18)

1. A method in a UE for random access, comprising the steps of:
-step a. transmitting a first wireless signal on a first air interface resource;
-step b. receiving a first signalling;
-step c. monitoring the second signaling in a first time window; or refrain from monitoring for the second signaling in the first time window;
wherein the first signaling is physical layer signaling and the second signaling is physical layer signaling; the first signaling is used to determine whether the second signaling is sent in 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 air interface resources; one of the air interface resources comprises a time frequency resource and a characteristic sequence; the identifier of the second signaling is associated with the identifier of the first air interface resource.
2. The method of claim 1, further comprising the steps of:
-step d. receiving a second radio signal on the first time-frequency resource;
wherein the second signaling is transmitted in the first time window, the second signaling being used to determine the first time-frequency resource.
3. The method of claim 1, wherein step a further comprises the steps of:
-step A0. receiving downstream information;
wherein the downlink information is used to determine at least one of { G antenna port groups, G uplink resource pools, a correspondence between the G antenna port groups and the G uplink resource pools }; the first uplink resource pool is one of the G uplink resource pools; the uplink resource pool comprises a positive integer of the air interface resources; and G is a positive integer.
4. The method of claim 3, wherein step A further comprises the steps of:
-a step a1. receiving a downlink RS (Reference Signal);
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.
5. The method according to any of claims 1 to 4, wherein the first signaling is transmitted on a first carrier, and at least one of { the second signaling, the first radio signal } is transmitted on a second carrier; the first carrier and the second carrier are orthogonal in the frequency domain.
6. The method of claim 4, wherein the second signaling and the first wireless signal are transmitted by the first antenna port set, respectively.
7. The method according to any of claims 1 to 4, wherein the first signaling indicates G1 uplink resource pools; if the first uplink resource pool belongs to the G1 uplink resource pools, the UE monitors the second signaling in the first time window; otherwise, the UE abandons monitoring the second signaling in the first time window; wherein G1 is a positive integer.
8. 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;
-step c. sending a second signaling in a first time window; or abandoning to send the second signaling in the first time window;
wherein the first signaling is physical layer signaling and the second signaling is physical layer signaling; the first signaling is used to determine whether the second signaling is sent in 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 air interface resources; one of the air interface resources comprises a time frequency resource and a characteristic sequence; the identifier of the second signaling is associated with the identifier of the first air interface resource.
9. The method of claim 8, further comprising the steps of:
-step d. transmitting a second radio signal on the first time-frequency resource;
wherein the second signaling is transmitted in the first time window, the second signaling being used to determine the first time-frequency resource.
10. The method of claim 8, wherein step a further comprises the steps of:
step A0. sending downstream information;
wherein the downlink information is used to determine at least one of { G antenna port groups, G uplink resource pools, a correspondence between the G antenna port groups and the G uplink resource pools }; the first uplink resource pool is one of the G uplink resource pools; the uplink resource pool comprises a positive integer of the air interface resources; and G is a positive integer.
11. The method of claim 10, wherein step a further comprises the steps of:
-step a1. sending a downlink RS (Reference Signal);
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 method according to any of claims 8 to 11, wherein the first signaling is transmitted on a first carrier, and at least one of { the second signaling, the first radio signal } is transmitted on a second carrier; the first carrier and the second carrier are orthogonal in the frequency domain.
13. The method of claim 11, wherein the second signaling and the first wireless signal are transmitted by the first antenna port set, respectively.
14. The method according to any of claims 8 to 11, wherein the first signaling indicates G1 uplink resource pools; if the first uplink resource pool belongs to the G1 uplink resource pools, the base station sends the second signaling in the first time window; otherwise, the base station abandons and sends the second signaling in the first time window; wherein G1 is a positive integer.
15. 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: for receiving a first signaling;
a second receiving module: for monitoring the second signaling in the first time window; or refrain from monitoring for the second signaling in the first time window;
wherein the first signaling is physical layer signaling and the second signaling is physical layer signaling; the first signaling is used to determine whether the second signaling is sent in 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 air interface resources; one of the air interface resources comprises a time frequency resource and a characteristic sequence; the identifier of the second signaling is associated with the identifier of the first air interface resource.
16. The UE of claim 15, further comprising:
a third receiving module: for receiving a second wireless signal on a first time-frequency resource;
wherein the second signaling is transmitted in the first time window, the second signaling being used to determine the first time-frequency resource.
17. 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 a first signaling;
a second sending module: for transmitting second signaling in the first time window; or abandoning to send the second signaling in the first time window;
wherein the first signaling is physical layer signaling and the second signaling is physical layer signaling; the first signaling is used to determine whether the second signaling is sent in 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 air interface resources; one of the air interface resources comprises a time frequency resource and a characteristic sequence; the identifier of the second signaling is associated with the identifier of the first air interface resource.
18. The base station device of claim 17, further comprising the following modules:
a third sending module: for transmitting a second wireless signal on the first time-frequency resource;
wherein the second signaling is transmitted in the first time window, the second signaling being used to determine the first time-frequency resource.
CN201610856351.1A 2016-09-27 2016-09-27 Method and device for UE (user equipment) and base station for random access Active CN107872254B (en)

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CN111050411B (en) * 2018-10-12 2022-03-18 展讯通信（上海）有限公司 Random access method and device, storage medium and terminal
CN113273098B (en) * 2019-01-17 2023-02-03 华为技术有限公司 Signal transmission method, related equipment and system
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