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US 11,109,423 B2Granted
Method and device for scheduling request in NB IoT systems
AssigneeSamsung Electronics Co., Ltd.
InventorsDi Su, Feifei Sun
Life of this patent
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Abstract
A method and device for reporting scheduling request are provided. The method includes the operations of acquiring a dedicated physical resource of a random access channel (RACH) configured to report a scheduling request, when the scheduling request is triggered, transmitting the RACH on the dedicated physical resource. The dedicated physical resource includes a plurality of periodic physical resources. Through this dedicated physical resource, the user equipment (UE) can report scheduling request in a contention-free random access way, and the capacity of a preamble sequence is improved and inter-cell interference is reduced.
Claims16
A method for reporting a scheduling request, the method comprising:
- acquiring a dedicated physical resource of a random access channel (RACH) used for reporting a scheduling request;
- and
- in response to the scheduling request being triggered, transmitting the scheduling request on the RACH using the dedicated physical resource,
- wherein the dedicated physical resource includes a plurality of periodic physical resources,
- wherein the dedicated physical resource includes a sequence resource,
- wherein the sequence resource includes a preamble sequence,
- wherein elements of the preamble sequence are transmitted according to one of preconfigured rules,
- wherein the sequence resource includes a scrambling sequence,
- wherein the scrambling sequence is obtained based on one of rules:
- that a length of the scrambling sequence is the same as a number of symbols in one symbol group of the RACH, and that the scrambling sequence is used by all symbol groups within the RACH of a user equipment (UE),
- that the length of the scrambling sequence is the same as a length of the symbols of one RACH, or
- that the length of the scrambling sequence is the same as a number of the symbol groups of the one RACH, that scrambling sequences are superimposed on different symbol groups of the one RACH for the UE, and that all symbols of each symbol group are multiplied by the scrambling sequence, and
- wherein the preconfigured rules comprise:
- in response to a same element of the preamble sequence being transmitted by each symbol within each repetition of the RACH and the elements of the preamble sequence being transmitted in sequence by every repetition of the RACH, the sequence resource includes multiple preamble sequences and a submultiple of a number of total repetitions is Mrep, where Mrep is the submultiple of the number of the total RACH repetitions,
- at least one element of the preamble sequence is transmitted repeatedly by all symbols within the one symbol group of the RACH and each element of the preamble sequence is transmitted in sequence according to a sequence of symbol groups in response to a length of the preamble sequence being the same as a number of the symbol groups of the RACH, or
- different elements of the preamble sequence are exhaustively transmitted in sequence by each oft-repeated symbol of the RACH in response to the length of the preamble sequence being the same as the number of the symbol groups of the RACH.
13 more elements
A device for reporting a scheduling request, the device comprising:
- at least one processor configured to acquire a dedicated physical resource of a random access channel (RACH) used for reporting a scheduling request;
- and
- a transceiver configured to transmit the scheduling request on the RACH using the dedicated physical resource in response to the scheduling request being triggered,
- wherein the dedicated physical resource includes a plurality of periodical physical resources,
- wherein the dedicated physical resource includes a sequence resource,
- wherein the sequence resource includes a preamble sequence,
- wherein elements of the preamble sequence are transmitted according to one of preconfigured rules,
- wherein the sequence resource includes a scrambling sequence,
- wherein the scrambling sequence is obtained based on one of rules:
- that a length of the scrambling sequence is the same as a number of symbols in one symbol group of the RACH, and that the scrambling sequence is used by all symbol groups within the RACH of a user equipment (UE),
- that the length of the scrambling sequence is the same as a length of the symbols of one RACH, or
- that the length of the scrambling sequence is the same as a number of the symbol groups of the one RACH, that scrambling sequences are superimposed on different symbol groups of the one RACH for the UE, and that all symbols of each symbol group are multiplied by the scrambling sequence, and
- wherein the preconfigured rules comprise:
- in response to a same element of the preamble sequence being transmitted by each symbol within each repetition of the RACH and the elements of the preamble sequence being transmitted in sequence by every repetition of the RACH, the sequence resource includes multiple preamble sequences and a submultiple of a number of total repetitions is Mrep, where Mrep is the submultiple of the number of the total RACH repetitions,
- at least one element of the preamble sequence is transmitted repeatedly by all symbols within the one symbol group of the RACH and each element of the preamble sequence is transmitted in sequence according to a sequence of symbol groups in response to a length of the preamble sequence being the same as a number of the symbol groups of the RACH, or
- different elements of the preamble sequence are exhaustively transmitted in sequence by each oft-repeated symbol of the RACH in response to the length of the preamble sequence being the same as the number of the symbol groups of the RACH.
13 more elements
Dependencies are inferred from the claim text.