Reference signal generation and determining reference signal resource allocation

• US 10,051,509 B2
• Filed: 12/09/2011
• Issued: 08/14/2018
• Est. Priority Date: 04/29/2011
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Intel Corporation
• Inventors: Zhu, Yuan, Davydov, Alexei, Chen, Xiaogang, Niu, Huaning, Fwu, Jong-Kae
• Primary Examiner(s): Roudani, Oussama
• Application Number:
  US13/519,312
• Publication Number:
  US 20150139079A1
• Time in Patent Office: 2,440 Days
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/0417 Feedback systems
• CPC Class Codes: H04B 7/0452 Multi-user MIMO systems
• CPC Class Codes: H04B 7/0465 taking power constraints at power amplifier or emission constraints, e.g. constant modulus, into account
• CPC Class Codes: H04B 7/0478 Special codebook structures directed to feedback optimisation
• CPC Class Codes: H04B 7/0482 Adaptive codebooks
• CPC Class Codes: H04B 7/0486 taking channel rank into account
• CPC Class Codes: H04B 7/0632 Channel quality parameters, e.g. channel quality indicator [CQI]
• CPC Class Codes: H04B 7/0639 Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
• CPC Class Codes: H04J 11/0046 using joint detection algorithms
• CPC Class Codes: H04L 1/0032 Without explicit signalling
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 27/2613 Structure of the reference signals
• CPC Class Codes: H04L 27/26132 using repetition
• CPC Class Codes: H04L 47/125 by balancing the load, e.g. traffic engineering
• CPC Class Codes: H04L 5/0025 Spatial division following the spatial signature of the channel
• CPC Class Codes: H04L 5/0026 Division using four or more dimensions
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0048 : Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0051 : of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04L 5/0053 : Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0055 : Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 5/0057 : Physical resource allocation for CQI
• CPC Class Codes: H04L 5/0092 : Indication of how the channel is divided
• CPC Class Codes: H04L 5/0094 : Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04L 63/10 : for controlling access to devices or network resources
• CPC Class Codes: H04L 65/611 : for multicast or broadcast systems for broadcast or conference H04L12/18; arrangements for broadcast or distribution combined with broadcast H04H20/00; arrangements for broadcast applications with a direct linkage to broadcast information or to broadcast space-time H04H60/00; selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS], H04W4/06
• CPC Class Codes: H04N 21/2365 : Multiplexing of several video streams
• CPC Class Codes: H04N 21/64322 : IP
• CPC Class Codes: H04W 12/06 : Authentication
• CPC Class Codes: H04W 12/08 : Access security
• CPC Class Codes: H04W 28/0231 : based on communication conditions dynamic wireless traffic scheduling definition based on channel quality criteria H04W72/54
• CPC Class Codes: H04W 28/0268 : using specific QoS parameters for wireless networks, e.g. QoS class identifier [QCI] or guaranteed bit rate [GBR] negotiating SLA or negotiating QoS H04W28/24
• CPC Class Codes: H04W 36/14 : Reselecting a network or an air interface
• CPC Class Codes: H04W 4/70 : Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 48/06 : based on traffic conditions
• CPC Class Codes: H04W 52/0203 : in the radio access network or backbone network of wireless communication networks
• CPC Class Codes: H04W 52/0219 : where the power saving management affects multiple terminals
• CPC Class Codes: H04W 68/005 : Transmission of information for alerting of incoming communication
• CPC Class Codes: H04W 72/20 : Control channels or signalling for resource management
• CPC Class Codes: H04W 72/21 : in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 : in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/566 : of the information or information source or recipient
• CPC Class Codes: H04W 8/04 : Registration at HLR or HSS [Home Subscriber Server]
• CPC Class Codes: H04W 84/12 : WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 88/02 : Terminal devices
• CPC Class Codes: H04W 88/06 : adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
• CPC Class Codes: H04W 88/10 : adapted for operation in multiple networks, e.g. multi-mode access points
• CPC Class Codes: Y02D 30/70 : in wireless communication networks

Abstract

Various embodiments include devices, methods, computer-readable media and system configurations for reference signal generation and resource allocation. In various embodiments, a wireless communication device may include a control module, which may be operated by a processor and configured to transmit to a user equipment (“UE”) device, over a wireless communication interface, a parameter specific to the UE device; wherein the parameter is usable by the eNB to generate a user equipment-specific reference signal (“UE-RS”) to be sent to the UE device. The parameter may be usable by the UE device to identify the UE-RS to facilitate demodulation of multiple-input, multiple-output communications. In various embodiments, a control module may be configured to store, in memory, priority rules, and to determine a UE-RS resource allocated to another UE device based on a UE-RS resource allocated to the UE device and the priority rules.

Claims

1. An evolved Node B (“

eNB”

) comprising;

a processor;

memory coupled to the processor; and

a control module to be operated by the processor and configured to transmit to a user equipment (“

UE”

) device, through downlink control information (“

DCI”

), an indication of a reference signal (“

RS”

) parameter value and a scrambling identity value that are to be used in conjunction with a physical cell layer identity, by the eNB, to determine an initialization value, Cinit, to generate a user equipment-specific reference signal (“

UE-RS”

) to be sent to the UE device, and the RS parameter value and the scrambling identity value are usable by the UE device to identify the UE-RS to facilitate demodulation by the UE device of multiple-input, multiple-output communications,

wherein the RS parameter value is a sub-cell identifier that is different from the physical cell layer identity and the scrambling identity value is determined by a single bit in the DCI.

2. The eNB of claim 1, wherein the DCI is in an extended format of DCI 2C or is a format DCI 2D, and includes more than 3 bits to indicate the parameter.

3. The eNB of claim 2, wherein the DCI is capable of indicating UE-RS ports 11 or 13 while also indicating a scrambling code identity (“

SCID”

) of 0 or 1.

4. The eNB of claim 1, wherein the RS parameter value is included as a multi-bit channel state information-reference signal (“

CSI-RS”

).

5. The eNB of claim 1, wherein the initialization value, c_init, that is used by the eNB to generate the UE-RS is initialized using the following equation:

c_init=(└

n_s/2┘

+1)×

(2N_ID^cell+1)×

2¹⁶+CSI-RS_ID×

2⁸+n_SCID

wherein CSI-RS_ID is the RS parameter value, n_s is a slot number in a radio frame, N_ID^cell is a physical cell layer identity, and n_SCID is the scrambling identity value.

6. The eNB of claim 1, further comprising a wireless communication interface.

12. The eNB of claim 1, wherein the memory comprises dynamic random access memory (“

DRAM”

) that stores instructions to implement the control module.

7. A computer-implemented method, comprising:

generating, by an evolved Node B (“

eNB”

), a user equipment-specific reference signal (“

UE-RS”

) based on an initialization value, Cinit, determined using a reference signal (“

RS”

) parameter value, a physical cell layer identity, and a scrambling code identity, wherein the UE-RS is usable by a UE device to facilitate demodulation by the UE device of multiple-input, multiple-output communications;

transmitting, by the eNB, an indication of the RS parameter value and the scrambling code identity to the UE device, over a wireless communication interface, using downlink control information (“

DCI”

),

wherein the RS parameter value is a sub-cell identifier that is different from the physical cell layer identity and the scrambling code identity is determined by a single bit in the DCI; and

transmitting the UE-RS.

8. The method of claim 7, wherein the DCI is an extension of DCI format 2C or is a DCI format 2D and includes more than 3 bits.

9. The method of claim 8, wherein the DCI is capable of indicating UE-RS ports 11 or 13 while also indicating a scrambling code identity (“

SCID”

) of 0 or 1.

10. The method of claim 7, wherein transmitting the RS parameter value to the UE device comprises transmitting the RS parameter value as a multi-bit channel state information-reference signal (“

CSI-RS”

).

11. The method of claim 7, further comprising initializing a pseudo-random sequence generator using the following equation:

(└

n_s/2┘

+1)×

(2N_ID^cell+1)×

2¹⁶+CSI-RS_ID×

2⁸+n_SCID

wherein ns is a slot number in a radio frame, N^cell_ID is a physical cell layer identity and n_SCID is the scrambling code identity, and CSI-RS_ID is the RS parameter value.