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US 11,057,935 B2Granted
Random access process in new radio
AssigneeComcast Cable Communications, LLC
InventorsHyoungsuk Jeon, Esmael Hejazi Dinan
Life of this patent
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Abstract
Systems, apparatuses, and methods are described for wireless communications. Random access procedures may include various types of procedures, such as four-step or two-step random access procedures.
Claims38
A method comprising:
- transmitting, by a wireless device and to a base station, a preamble associated with one or more transport blocks;
- receiving, by the wireless device, a media access control (MAC) packet data unit comprising:
- one or more MAC subheaders, wherein a first MAC subheader of the one or more MAC subheaders comprises a random access preamble identifier (RAPID) of the preamble;
- and
- one or more random access responses (RARs), wherein each RAR of the one or more RARs is associated with a MAC subheader of the one or more MAC subheaders;
- determining, based on a field in the first MAC subheader:
- a size of a first RAR, of the one or more RARs, associated with a random access procedure;
- and
- a type of the first RAR of the one or more RARs,
- wherein a type of the random access procedure is one of a plurality of types of random access procedures comprising at least a two-step random access procedure and a four-step random access procedure;
- and
- determining, based on the MAC packet data unit, that the random access procedure has completed.
9 more elements
A method comprising:
- transmitting, by a wireless device and to a base station, a first transmission comprising:
- a first random access preamble (RAP) comprising a first random access preamble identifier (RAPID);
- and
- one or more transport blocks;
- receiving a media access control (MAC) packet data unit comprising:
- one or more MAC subheaders, wherein a first MAC subheader of the one or more MAC subheaders comprises the first RAPID;
- and
- one or more random access responses (RARs), wherein each RAR of the one or more RARs is associated with a MAC subheader of the one or more MAC subheaders;
- determining, based on the first MAC subheader:
- a size of a first RAR, of the one or more RARs, associated with a random access procedure;
- and
- a type of the first RAR of the one or more RARs,
- wherein a type of the random access procedure is one of a plurality of types of random access procedures comprising at least a two-step random access procedure and a four-step random access procedure;
- determining, based on the type of the first RAR and based on the first RAPID, whether the first transmission was successful in delivering the one or more transport blocks to the base station;
- and
- transmitting, to the base station and based on the type of the first RAR, one or more messages.
13 more elements
A method comprising:
- receiving, by a base station and from a wireless device, a random access preamble (RAP);
- determining a type of a random access procedure, from among a plurality of types of random access procedures comprising at least a two-step random access procedure and a four-step random access procedure, for communicating with the wireless device;
- determining, based on the type of the random access procedure, a size of a first random access response (RAR) of one or more RARs;
- and
- transmitting, based on the RAP, a media access control (MAC) packet data unit comprising:
- one or more MAC subheaders, wherein a first field in a first MAC subheader of the one or more MAC subheaders comprises an indication of a type of the first RAR, wherein the first RAR is based on a random access preamble identifier (RAPID) in the RAP;
- and
- the one or more RARs, wherein each RAR of the one or more RARs is associated with a MAC subheader of the one or more MAC subheaders.
5 more elements
A wireless device comprising:
- one or more processors;
- and
- memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
- transmit, to a base station, a preamble associated with one or more transport blocks;
- receive a media access control (MAC) packet data unit comprising:
- one or more MAC subheaders, wherein a first MAC subheader of the one or more MAC subheaders comprises a random access preamble identifier (RAPID) of the preamble;
- and
- one or more random access responses (RARs), wherein each RAR of the one or more RARs is associated with a MAC subheader of the one or more MAC subheaders;
- determine, based on a field in the first MAC subheader:
- a size of a first RAR, of the one or more RARs, associated with a random access procedure;
- and
- a type of the first RAR of the one or more RARs,
- wherein a type of the random access procedure is one of a plurality of types of random access procedures comprising at least a two-step random access procedure and a four-step random access procedure;
- and
- determine, based on the MAC packet data unit, that the random access procedure has completed.
12 more elements
A wireless device comprising:
- one or more processors;
- and
- memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
- transmit, to a base station, a first transmission comprising:
- a first random access preamble (RAP) comprising a first random access preamble identifier (RAPID);
- and
- one or more transport blocks;
- receive a media access control (MAC) packet data unit comprising:
- one or more MAC subheaders, wherein a first MAC subheader of the one or more MAC subheaders comprises the first RAPID;
- and
- one or more random access responses (RARs), wherein each RAR of the one or more RARs is associated with a MAC subheader of the one or more MAC subheaders;
- determine, based on the first MAC subheader;
- a size of a first RAR, of the one or more RARs, associated with a random access procedure;
- and
- a type of the first RAR of the one or more RARs,
- wherein a type of the random access procedure is one of a plurality of types of random access procedures comprising at least a two-step random access procedure and a four-step random access procedure;
- determine, based on the type of the first RAR and based on the first RAPID, whether the first transmission was successful in delivering the one or more transport blocks to the base station;
- and
- transmit, to the base station and based on the type of the first RAR, one or more messages.
16 more elements
A base station comprising:
- one or more processors;
- and
- memory storing instructions that, when executed by the one or more processors, cause the base station to:
- receive, from a wireless device, a random access preamble (RAP);
- determine a type of a random access procedure, from among a plurality of types of random access procedures comprising at least a two-step random access procedure and a four-step random access procedure, for communicating with the wireless device;
- determine, based on the type of the random access procedure, a size of a first random access response (RAR) of one or more RARs;
- and
- transmit, based on the RAP, a media access control (MAC) packet data unit comprising:
- one or more MAC subheaders, wherein a first field in a first MAC subheader of the one or more MAC subheaders comprises an indication of a type of the first RAR, wherein the first RAR is based on a random access preamble identifier (RAPID) in the RAP;
- and
- the one or more RARs, wherein each RAR of the one or more RARs is associated with a MAC subheader of the one or more MAC subheaders.
8 more elements
Dependencies are inferred from the claim text.