Random access configurations
View Patent ↗A system and method for random access configurations are disclosed herein. In one embodiment, a method performed by a communication device includes: defining, based on a parameter for communication with a communication node, at least one of: a plurality of random access channel (RACH) groups, and a relationship between individual RACH groups of the plurality of RACH groups and measurement results; obtaining the measurement results from a plurality of signals; determining a matching RACH group from the plurality of RACH groups based on the measurement results; and sending a message using at least one resource of the matching RACH group.
1. A method performed by a communication device, the method comprising:
determining, based on at least one parameter for communication with a communication node:
a plurality of random access channel (RACH) groups, and
a relationship between an individual RACH group of the plurality of RACH groups and a plurality of signals, wherein each individual RACH group of the plurality of RACH groups comprises at least one RACH occasion and a number of contention-based RACH preambles per synchronization signal (SS) block, and the at least one parameter indicates the number of contention-based RACH preambles in each individual RACH group and a number of RACH groups per RACH occasion, wherein each RACH occasion corresponds to a time instance in which a contention-based RACH preamble may be transmitted and wherein the plurality of RACH groups are determined based on a RACH group period;
obtaining measurement results from the plurality of signals, wherein the plurality of signals comprises at least one SS block;
determining a matching RACH group from the plurality of RACH groups based on the measurement results; and
sending a message using at least one resource of the matching RACH group to the communication node.
2. The method of claim 1 , wherein the at least one parameter further indicates a quantity of the measurement results.
3. The method of claim 1 , wherein the at least one parameter further indicates a set of all RACH resources that may be utilized for sending the message.
4. The method of claim 1 , further comprising determining the matching RACH group from the plurality of RACH groups based on the measurement results in accordance with a criterion.
5. The method of claim 4 , wherein the criterion is one of: a greatest reference signal received power (RSRP), a greatest reference signal received quality (RSRQ), and a greatest signal to noise and interference power ratio (SINR).
6. The method of claim 1 , wherein the plurality of signals further comprises at least one of SS bursts, SS burst sets, reference signals, or a broadcast channel carrying system information.
7. A method performed by a communication node, the method comprising:
determining at least one parameter for communication with a communication device, wherein the at least one parameter indicates:
a plurality of random access channel (RACH) groups, and
a relationship between an individual RACH group of the plurality of RACH groups and a plurality of signals, wherein each individual RACH group of the plurality of RACH groups comprises at least one RACH occasion and a number of contention-based RACH preambles per synchronization signal (SS) block, and the at least one parameter indicates the number of contention-based RACH preambles in each individual RACH group and a number of RACH groups per RACH occasion, wherein each RACH occasion corresponds to a time instance in which a contention-based RACH preamble may be transmitted and wherein the plurality of RACH groups are determined based on a RACH group period;
transmitting the plurality of signals to the communication device, wherein the plurality of signals comprises at least one SS block;
receiving a message on at least one resource of a matching RACH group of the plurality of RACH groups from the communication device.
8. The method of claim 7 , wherein the at least one parameter further indicates a quantity of the measurement results.
9. The method of claim 7 , wherein the at least one parameter further indicates a set of all RACH resources that may be utilized for receiving the message.
10. A communication device, comprising:
at least one processor configured to:
determine, based on at least one parameter for communication with a communication node:
a plurality of random access channel (RACH) groups, and
a relationship between an individual RACH group of the plurality of RACH groups and a plurality of signals, wherein each individual RACH group of the plurality of RACH groups comprises at least one RACH occasion and a number of contention-based RACH preambles per synchronization signal (SS) block, and the at least one parameter indicates the number of contention-based RACH preambles in each individual RACH group and a number of RACH groups per RACH occasion, wherein each RACH occasion corresponds to a time instance in which a contention-based RACH preamble may be transmitted and wherein the plurality of RACH groups are determined based on a RACH group period;
obtain measurement results from the plurality of signals, wherein the plurality of signals comprises at least one SS block;
determine a matching RACH group from the plurality of RACH groups based on the measurement results; and
a transmitter configured to send a message using at least one resource of the matching RACH group to the communication node.
11. The communication device of claim 10 , wherein the at least one parameter further indicates a quantity of the measurement results.
12. The communication device of claim 10 , wherein the at least one parameter further indicates a set of all RACH resources that may be utilized for sending the message.
13. The communication device of claim 10 , wherein the at least one processor is further configured to determine the matching RACH group from the plurality of RACH groups based on the measurement results in accordance with a criteria.
14. The communication device of claim 13 , wherein the criteria is one of: a greatest reference signal received power (RSRP), a greatest reference signal received quality (RSRQ), and a greatest signal to noise and interference power ratio (SINR).
15. The communication device of claim 10 , wherein the plurality of signals further comprises at least one of SS bursts, SS burst sets, reference signals, or a broadcast channel carrying system information.
16. A communication node, comprising:
at least one processor configured to:
determine at least one parameter for communication with a communication device, wherein the at least one parameter indicates:
a plurality of random access channel (RACH) groups, and
a relationship between an individual RACH group of the plurality of RACH groups and a plurality of signals, wherein each individual RACH group of the plurality of RACH groups comprises at least one RACH occasion and a number of contention-based RACH preambles per synchronization signal (SS) block, and the at least one parameter indicates the number of contention-based RACH preambles in each individual RACH group and a number of RACH groups per RACH occasion, wherein each RACH occasion corresponds to a time instance in which a contention-based RACH preamble may be transmitted and wherein the plurality of RACH groups are determined based on a RACH group period;
a transmitter configured to transmit the plurality of signals to the communication device, wherein the plurality of signals comprises at least one SS block; and
a receiver configured to receive a message on at least one resource of a matching RACH group of the plurality of RACH groups from the communication device.
17. The communication device of claim 16 , wherein the at least one parameter further indicates a quantity of the measurement results.
18. The communication device of claim 16 , wherein the at least one parameter further indicates a set of all RACH resources that may be utilized for receiving the message.