Systems and methods for modulation and coding scheme selection and configuration

• US 9,467,269 B2
• Filed: 09/25/2014
• Issued: 10/11/2016
• Est. Priority Date: 01/06/2014
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Intel IP Corporation (Intel Corporation)
• Inventors: Davydov, Alexei, Kwon, Hwan-Joon, Han, Seunghee, Morozov, Gregory V.
• Primary Examiner(s): Wu, Jianye
• Application Number:
  US14/496,970
• Publication Number:
  US 20150195818A1
• Time in Patent Office: 747 Days
• US Class Current: 1/1
• CPC Class Codes: H04L 1/0016 involving special memory structures, e.g. look-up tables
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/003 Adaptive formatting arrangements particular to signalling, e.g. variable amount of bits
• CPC Class Codes: H04L 1/009 arrangements specific to transmitters
• CPC Class Codes: H04L 27/3494 using non - square modulating pulses, e.g. using raised cosine pulses; Partial response QAM, i.e. with partial response pulse shaping QAM over partial response channels H04L25/497
• CPC Class Codes: H04L 5/0046 Determination of how many bits are transmitted on different sub-channels
• CPC Class Codes: H04L 5/0057 Physical resource allocation for CQI
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

Methods, systems, and devices for modulation and coding scheme selection and configuration. A mobile communication device includes a table component, a table selection component, and a communication component. The table component is configured to maintain two or more tables each having entries for a plurality of available modulation schemes. The two or more tables include a default table and a secondary table. The default table and the secondary table have a matching number of entries, and the secondary table includes an entry corresponding to a 256-QAM scheme. The table selection component is configured to select a selected table from one of the default table and the secondary table. The communication component is configured to receive and process a communication from a base station based on a modulation and coding scheme of the selected table.

Claims

1. A mobile communication device configured to:

store, in a data storage of the mobile communication device, data corresponding to a first table having entries for a plurality of modulation schemes for communication between the mobile communication device and a base station;

store, in the data storage, data corresponding to a second table having entries for a modulation scheme including at least one entry of a modulation order that is higher than a modulation order of each of the plurality of modulation schemes of the first table, wherein the second table comprises a same number of entries as the first table, and wherein the second table is configured for selective use in place of the first table;

select a selected table from one of the first table and the second table based, at least in part, on a parameter of a layer higher than a physical layer, a radio network temporary identifier (RNTI) used for scrambling a cyclic redundancy check (CRC), and an implicit feature of a downlink control information (DCI) message; and

receive and process a communication from the base station based on an entry in the selected table.

2. The mobile communication device of claim 1, wherein the first table and the second table are predefined by a communication standard.

3. The mobile communication device of claim 1, wherein the mobile communication device is further configured to determine a rank indicator based on a current channel quality, and wherein selecting the selected table comprises selecting based, at least in part, on the rank indicator.

4. The mobile communication device of claim 3, wherein selecting the selected table comprises selecting based, at least in part, on the rank indicator meeting or exceeding a rank indicator threshold configured via one or more of a radio resource configuration (RRC) layer message and a medium access control (MAC) layer message.

5. The mobile communication device of claim 1, wherein selecting the selected table comprises selecting based, at least in part, on control information received in a physical layer communication.

6. The mobile communication device of claim 5, wherein the control information indicates a number of scheduled layers and wherein selecting the selected table comprises selecting based, at least in part, on the number of scheduled layers.

7. The mobile communication device of claim 6, wherein selecting the selected table comprises selecting based, at least in part, on the number of scheduled layers meeting or exceeding a layer threshold configured via one or more of a radio resource control (RRC) layer message and a medium access control (MAC) layer message.

8. The mobile communication device of claim 1, wherein selecting the selected table comprises selecting the second table only if the RNTI used for scrambling the CRC is a cell RNTI (C-RNTI).

9. The mobile communication device of claim 1, wherein the mobile communication device comprises a soft buffer comprising a maximum soft buffer size, wherein the mobile communication device is further configured to use a default soft buffer size until an indication from a base station indicates a capability corresponding to the maximum soft buffer size, wherein the default soft buffer size is less than the maximum soft buffer size.