Search space design for control channel in wireless communication

A method of wireless communication operable at a subordinate entity, comprising:

• receiving a sub-band configuration comprising a plurality of sub-bands of a downlink bandwidth,
• determining a search space comprising one or more control channel elements (CCEs), wherein each of the CCEs is mapped to one or more resource element groups (REGs) that are located in a same one of the plurality of sub-bands;
• and
• receiving one or more downlink control messages from a scheduling entity utilizing the one or more CCEs.

A scheduling entity configured for wireless communication comprising:

• a communication interface configured to communicate with a plurality of subordinate entities;
• a memory stored with executable code;
• and
• a processor operatively coupled to the communication interface and memory,
• wherein the processor is configured by the executable code to:
• divide a downlink bandwidth into a plurality of sub-bands;
• allocate a search space to each of the plurality of subordinate entities, wherein the search space comprises one or more control channel elements (CCEs) each mapped to one or more resource element groups (REGs) that are located in a same one of the plurality of sub-bands;
• and
• transmit one or more downlink control messages, utilizing the communication interface, to the plurality of subordinate entities utilizing the one or more CCEs.

A subordinate entity configured for wireless communication comprising:

• a communication interface configured to communicate with a scheduling entity;
• a memory stored with executable code;
• and
• a processor operatively coupled to the communication interface and memory,
• wherein the processor is configured by the executable code to:
• receive a sub-band configuration comprising a plurality of sub-bands of a downlink bandwidth,
• determine a search space comprising one or more control channel elements (CCEs), wherein each of the CCEs is mapped to one or more resource element groups (REGs) that are located in a same one of the plurality of sub-bands;
• and
• receive one or more downlink control messages from the scheduling entity utilizing the one or more CCEs.