Device communication using a reduced channel bandwidth
Systems and/or methods for supporting communications at a reduced bandwidth with a full bandwidth network such as a long-term evolution (LTE) network may be disclosed. For example, inband assignments such as downlink assignments and/or uplink grants may be provided and/or received and transmissions may be monitored and/or decoded based on the inband assignment. Additionally, information (e.g. a definition or configuration) associated with an ePDCCH may be provided and/or received and ePDCCH resources may be monitored and/or decoded based on such information. An indication for support of a reduced bandwidth by the full bandwidth network may also be provided and/or received and control channels in the reduced or narrow bandwidth may be monitored and/or decoded based on the indication. A PRACH preamble and/or a multi-type subframe definition may also be provided and/or used for support of such a reduced bandwidth.
1. A reduced-bandwidth wireless transmit/receive unit (WTRU) comprising:
a processor configured to at least:
receive configuration information indicating a set of physical random access channel (PRACH) resources associated with a reduced-bandwidth operation and a set of PRACH parameters associated with the reduced-bandwidth operation;
select a preamble from the set of PRACH resources;
send a preamble transmission using the selected preamble in accordance with at least one PRACH parameter of the set of PRACH parameters;
receive downlink (DL) control information associated with a random access response, wherein the DL control information associated with the random access response is received on a control channel resource, wherein the control channel resource is determined based on the selected preamble from the set of PRACH resources used for the preamble transmission; and
receive the random access response in accordance with the received DL control information.
2. The reduced-bandwidth WTRU of claim 1 , wherein the configuration information comprising the set of PRACH resources and the set of PRACH parameters is received via radio resource control (RRC) signaling or broadcast signaling.
3. The reduced-bandwidth WTRU of claim 1 , wherein the configuration information indicates subframes and frequencies associated with reduced-bandwidth operation.
4. The reduced-bandwidth WTRU of claim 1 , wherein the control channel resource comprises a set of resource blocks (RBs).
5. The reduced-bandwidth WTRU of claim 4 , wherein the set of RBs is indicated by one of the set of PRACH parameters.
6. The reduced-bandwidth WTRU of claim 1 , wherein the control channel resource comprises a machine-type communication (MTC) physical downlink control channel (M-PDCCH) resource.
7. The reduced-bandwidth WTRU of claim 1 , wherein the random access response comprises an uplink (UL) grant.
8. A method implemented by a reduced-bandwidth wireless transmit/receive unit (WTRU), the method comprising:
receiving configuration information indicating a set of physical random access channel (PRACH) resources associated with a reduced-bandwidth operation and a set of PRACH parameters associated with the reduced-bandwidth operation;
selecting a preamble from the set of PRACH resources;
sending a preamble transmission using the selected preamble in accordance with at least one PRACH parameter of the set of PRACH parameters;
receiving downlink (DL) control information associated with a random access response, wherein the DL control information associated with the random access response is received on a control channel resource, wherein the control channel resource is determined based on the selected preamble from the set of PRACH resources used for the preamble transmission; and
receiving the random access response in accordance with the received DL control information.
9. The method of claim 8 , wherein the configuration information comprising the set of PRACH resources and the set of PRACH parameters is received via radio resource control (RRC) signaling or broadcast signaling.
10. The method of claim 8 , wherein the configuration information indicates subframes and frequencies associated with reduced-bandwidth operation.
11. The method of claim 8 , wherein the control channel resource comprises a set of resource blocks (RBs).
12. The method of claim 11 , wherein the set of RBs is indicated by one of the set of PRACH parameters.
13. The method of claim 8 , wherein the control channel resource comprises a machine-type communication (MTC) physical downlink control channel (M-PDCCH) resource.
14. The method of claim 8 , wherein the random access response comprises an uplink (UL) grant.