Control resources reuse for data transmission in wireless communication
Aspects of the present disclosure provide various methods and apparatuses configured to reuse, reallocate, reserve, or reassign available control resources in a control region for carrying downlink (DL) payload or user data. The inventive concept and idea may also be applied to reuse control resources for uplink (UL) and/or sidelink user data transmission in both frequency division duplex (FDD) and time division duplex (TDD) configurations in other embodiments.
1. A method of wireless communication, comprising:
communicating with a user equipment (UE) utilizing a slot comprising a control portion and a data portion;
determining that one or more communication resources allocated to the control portion are unused for transmitting control data;
reallocating and utilizing the one or more communication resources for transmitting user data in a physical downlink shared channel (PDSCH) in the data portion;
indicating to the UE symbol position and frequency of the one or more communication resources reallocated in the data portion; and
rate-matching the PDSCH outside at least one of a control resource set, a search space, or a physical downlink control channel (PDCCH) of another user equipment.
2. The method of claim 1 , wherein the indicating comprises:
indicating, in each slot, to the UE to utilize the one or more communication resources in the data portion.
3. The method of claim 1 , further comprising:
configuring the UE to utilize the one or more communication resources in the data portion of a first slot based on a first rate-matching rule; and
configuring the UE to utilize the one or more communication resources in the data portion of a second slot based on a second rate-matching rule that is different from the first rate-matching rule.
4. An apparatus comprising:
a communication interface configured to communicate with a user equipment (UE);
a memory; and
a processor operatively coupled with the communication interface and memory,
wherein the processor and memory are configured to:
communicate with the UE utilizing a slot comprising a control portion and a data portion;
determine that one or more communication resources allocated to the control portion are unused for transmitting control data;
reallocate and utilize the one or more communication resources for transmitting user data in a physical downlink shared channel (PDSCH) in the data portion;
indicate to the UE symbol position and frequency of the one or more communication resources reallocated in the data portion; and
rate-match the PDSCH outside at least one of a control resource set, a search space, or a physical downlink control channel (PDCCH) of another user equipment.
5. The apparatus of claim 4 , wherein the processor and memory are further configured to:
indicate, in each slot, to the UE to utilize the one or more communication resources in the data portion.
6. The apparatus of claim 4 , wherein the processor and memory are further configured to:
configure the UE to utilize the one or more communication resources in the data portion of a first slot based on a first rate-matching rule; and
configure the UE to utilize the one or more communication resources in the data portion of a second slot based on a second rate-matching rule that is different from the first rate-matching rule.
7. A method of wireless communication at a user equipment (UE), comprising:
receiving, from a scheduling entity, an indication that one or more communication resources of a control portion of a slot are reallocated to a data portion of the slot, wherein the indication indicates symbol position and frequency of the one or more communication resources reallocated in the data portion; and
receiving, from the scheduling entity, user data in the data portion including the one or more reallocated communication resources in a physical downlink shared channel (PDSCH), based on a predetermined rate-matching rule of the PDSCH to exclude communication resources in at least one of a control resource set (CORESET), a search space, or a physical downlink control channel (PDCCH) of another user equipment.
8. The method of claim 7 , wherein the receiving the indication comprises:
receiving, in each slot, the indication to utilize the one or more communication resources in the data portion.
9. The method of claim 7 , further comprising:
utilizing the one or more communication resources in the data portion of a first slot based on a first rate-matching rule; and
utilizing the one or more communication resources in the data portion of a second slot based on a second rate-matching rule that is different from the first rate-matching rule.
10. An apparatus comprising:
a communication interface configured to communicate with a scheduling entity;
a memory; and
a processor operatively coupled with the communication interface and memory,
wherein the processor and memory are configured to:
receive, from the scheduling entity, an indication that one or more communication resources of a control portion of a slot are reallocated to a data portion of the slot, wherein the indication indicates symbol position and frequency of the one or more communication resources reallocated in the data portion; and
receive, from the scheduling entity, user data in the data portion including the one or more reallocated communication resources in a physical downlink shared channel (PDSCH), based on a predetermined rate-matching rule of the PDSCH to exclude communication resources in at least one of a control resource set (CORESET), a search space, or a physical downlink control channel (PDCCH) of another user equipment.
11. The apparatus of claim 10 , wherein the processor and memory are further configured to:
receive, in each slot, the indication to utilize the one or more communication resources in the data portion.
12. The apparatus of claim 10 , wherein the processor and memory are further configured to:
utilize the one or more communication resources in the data portion of a first slot based on a first rate-matching rule; and
utilize the one or more communication resources in the data portion of a second slot based on a second rate-matching rule that is different from the first rate-matching rule.