Method and system for managing an intersymbol interference in an ultra-high frequency cellular network

A method of a UE for managing an inter-symbol interference (ISI) in a high frequency cellular network, the method comprising:

• connecting with a base station (BS) using at least one of a first custom cyclic prefix (CP) length or a first sub-carrier spacing (SCS) when receiving an indication of at least one of the first custom CP length or the first SCS calculated by the BS;
• determining that a channel estimation parameter associated with the UE is less than a pre-determined threshold value when using at least one of the first custom CP length or the first SCS, wherein the channel estimation parameter corresponds to a delay spread of a channel for a high frequency communication;
• determining at least one of a second custom CP length or a second SCS in response to determining that the channel estimation parameter is less than the pre-determined threshold value;
• and
• transmitting, to the BS, at least one of the second custom CP length or the second SCS for managing the ISI through one of a physical uplink control channel (PUCCH) format or a physical uplink shared channel (PUSCH) format.

A base station (BS) for managing an inter-symbol interference (ISI) in a cellular network, the BS comprising:

• memory storing instructions;
• a transceiver;
• and
• at least one processor operably coupled to the memory and the transceiver, wherein the instructions, when executed by the at least one processor, cause the BS to:
• receive at least one user equipment (UE)-capability information element comprising a list of cycle prefix (CP) lengths and a list of sub-carriers spaces (SCSs);
• determine a plurality of parameters associated with a UE based on the list of CP lengths and the list of SCSs;
• determine at least one of a first custom CP length or a first SCS based on the plurality of parameters from the list of CP lengths and the list of SCS;
• and
• transmit, to the UE, an indication that at least one of the first custom CP length or the first SCS is selected for managing the ISI.

A user equipment (UE) for managing an inter-symbol interference (ISI) in a cellular network, the UE comprising:

• memory storing instructions,
• a transceiver;
• and
• at least one processor operably coupled to the memory and the transceiver, wherein the instructions when executed by the at least one processor, cause the UE to:
• connect with a base station (BS) using at least one of a first custom cyclic prefix (CP) length or a first sub-carrier spacing (SCS) when receiving an indication of at least one of the first custom CP length or the first SCS calculated by the BS;
• determine that a channel estimation parameter associated with the UE is less than a pre-determined threshold value when using at least one of the first custom CP length or the first SCS, wherein the channel estimation parameter corresponds to a delay spread of a channel for a high frequency communication;
• determine at least one of a second custom CP length or a second SCS in response to determining that the channel estimation parameter is less than the pre-determined threshold value;
• and
• transmit, to the BS, at least one of the second custom CP length or the second SCS for managing the ISI through one of a physical uplink control channel (PUCCH) format and a physical uplink shared channel (PUSCH) format.