US 9,806,862 B2Granted

Grouping of CS and comb values for DM-RS and SRS on shared time-frequency resources

AssigneeNokia Technologies Oy

InventorsMauri Nissila, Kari Hooli, Kari Pajukoski, Esa Tiirola

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Abstract

A method for grouping of CS (and comb values) for DM-RS and SRS on shared time-frequency resources is described. The method includes dividing a RS space into at least a first region and a second region. The method also includes allocating, from the first region, a DM-RS sequence CS and/or a DM-RS comb for a DM-RS; and allocating, from the second region, a SRS sequence CS and/or a SRS comb for a SRS. The DM-RS and the SRS are on the same resources on an uplink shared channel (such as a PUSCH for example). The RS space comprises at least one of a CS set and a IFDM comb set. The CS set and/or the IFDM comb set of the first region is based at least in part on a number of physical resource blocks allocated to the uplink shared channel. Apparatus and computer readable media are also described.

Claims18

Dependent claims

An apparatus, comprising at least one processor;

and at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus to perform at least the following:
to divide a reference signal space into at least a first region and a second region;
to allocate, from the first region, at least one of a demodulation reference signal sequence cyclic shift and a demodulation reference signal comb for a demodulation reference signal;
to allocate, from the second region, at least one of a sounding reference signal sequence cyclic shift and a sounding reference signal comb for a sounding reference signal,
to set a minimum bandwidth of the uplink shared channel and to configure a size of a reference signal space in response to a predefined parameter indicative of an uplink bandwidth usage;
and
where the demodulation reference signal and the sounding reference signal are on the same resources on an uplink shared channel,
where the reference signal space comprises at least one of a cyclic shift set and an interleaved frequency division multiple comb set, and
where the at least one of the cyclic shift set and the interleaved frequency division multiple comb set of the first region is based at least in part on a number of physical resource blocks allocated to the uplink shared channel, and wherein at least one of the demodulation reference signal sequence cyclic shift resolution and the demodulation reference signal comb are dependent on the number of physical response blocks allocated to the uplink shared channel.

6 more elements

A method comprising:

receiving, by a user equipment, an indication of at least one of a demodulation reference signal sequence cyclic shift and a demodulation reference signal comb for a demodulation reference signal;
receiving, by a user equipment, an indication of at least one of a sounding reference signal sequence cyclic shift and a sounding reference signal comb for a sounding reference signal;
receiving, by a user equipment, a set minimum bandwidth of an uplink shared channel and a configuration of a size of a reference signal space set in response to a predefined parameter indicative of an uplink bandwidth usage;
where the at least one of the demodulation reference signal sequence cyclic shift and the demodulation reference signal comb are from a first region of a reference signal space,
where the at least one of a sounding reference signal sequence cyclic shift and the sounding reference signal comb are from a second region of the reference signal space,
where the demodulation reference signal and the sounding reference signal are on the same resources on the uplink shared channel,
where the reference signal space comprises at least one of a cyclic shift set and an interleaved frequency division multiple comb set, and
where the at least one of the cyclic shift set and the interleaved frequency division multiple comb set of first region is based at least in part on a number of physical resource blocks allocated to the uplink shared channel, and wherein at least one of the demodulation reference signal sequence cyclic shift resolution and the demodulation reference signal comb are dependent on the number of physical response blocks allocated to the uplink shared channel;
transmitting, by a user equipment, the demodulation reference signal using the at least one of the demodulation reference signal sequence cyclic shift and the demodulation reference signal comb;
and
transmitting, by a user equipment, the sounding reference signal using the at least one of the sounding reference signal sequence cyclic shift and the sounding reference signal comb.

8 more elements

An apparatus comprising at least one processor;

and at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus to perform at least the following:
to receive an indication of at least one of a demodulation reference signal sequence cyclic shift and a demodulation reference signal comb for a demodulation reference signal;
to receive an indication of at least one of a sounding reference signal sequence cyclic shift and a sounding reference signal comb for a sounding reference signal;
to receive a set minimum bandwidth of an uplink shared channel a configuration of a size of a reference signal space set in response to a predefined parameter indicative of an uplink bandwidth usage;
where the at least one of the demodulation reference signal sequence cyclic shift and the demodulation reference signal comb are from a first region of a reference signal space, where the at least one of a sounding reference signal sequence cyclic shift and the sounding reference signal comb are from a second region of the reference signal space,
where the demodulation reference signal and the sounding reference signal are on the same resources on the uplink shared channel,
where the reference signal space comprises at least one of a cyclic shift set and an interleaved frequency division multiple comb set, and
where the at least one of the cyclic shift set and the interleaved frequency division multiple comb set of first region is based at least in part on a number of physical resource blocks allocated to the uplink shared channel, and wherein at least one of the demodulation reference signal sequence cyclic shift resolution and the demodulation reference signal comb are dependent on the number of physical response blocks allocated to the uplink shared channel;
to transmit the demodulation reference signal using the at least one of the demodulation reference signal sequence cyclic shift and the demodulation reference signal comb;
and
to transmit the sounding reference signal using the at least one of the sounding reference signal sequence cyclic shift and the sounding reference signal comb.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/439,973Filed 21 Dec 2012
Published: US 2015/0312009 A129 Oct 2015
Granted: 31 Oct 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

H04L 5/005
Allocation of pilot signals, i.e. of signals known to the receiver: of common pilots, i.e. pilots destined for multiple users or terminals
H04B 7/024
Site diversity; Macro-diversity: co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input…
H04L 1/0048
Decoding adapted to other signal detection operation: in conjunction with detection of multiuser or interfering signals, e.g. iteration between…
H04L 5/003
Arrangements affording multiple use of the transmission path: arrangements for allocating sub-channels of the transmission path