1. User equipment (UE) comprising:
a transceiver configured to transmit signals to and receive signals from an enhanced Node B (eNB) in a network; and
processing circuitry configured to:
receive downlink control information (DCI) from the eNB, the DCI configured to provide a resource allocation comprising a reduced physical resource block (PRBmin) of less than one PRB for at least one of downlink (DL) and uplink (UL) communications in a PRB of a subframe, wherein the PRB comprises 12 wide subcarriers or 24 narrow subcarriers in frequency, and wherein the PRBmin comprises either fewer than 12 wide subcarriers or fewer than 24 narrow subcarriers; and
configure the transceiver to communicate with the eNB using the resource allocation.
2. The UE of claim 1, wherein:
the resource allocation for the UE within the PRB comprises a localized allocation throughout a slot of the subframe such that each subcarrier in the PRBmin is adjacent to another subcarrier in the PRBmin.
3. The UE of claim 2, wherein:
the resource allocation for the UE within the PRB comprises a localized allocation throughout both slots of the subframe such that each subcarrier in the PRBmin is adjacent to another subcarrier in the PRBmin throughout the subframe.
4. The UE of claim 1, wherein:
the resource allocation for the UE within the PRB comprises a distributed allocation throughout a slot of the subframe such that each subcarrier in the PRBmin is adjacent to a subcarrier in another PRBmin, in the PRB, allocated to a different UE.
5. The UE of claim 4, wherein:
the resource allocation for the UE within the PRB comprises a distributed allocation throughout both slots of the subframe such that each subcarrier in the PRBmin is adjacent to the subcarrier in the other PRBmin throughout the subframe.
6. The UE of claim 1, wherein:
the resource allocation for the UE within the PRBmin throughout a slot of the subframe comprises at least one of a localized allocation throughout a slot of the subframe such that each subcarrier in the PRBmin is adjacent to another subcarrier in the PRBmin and a distributed allocation throughout a slot of the subframe such that each subcarrier in the PRBmin is adjacent to a subcarrier in another PRBmin, in the PRB, allocated to a different UE, and
the resource allocations for the UE within the PRB throughout each slot of the subframe are independent of each other.
7. The UE of claim 1, wherein:
whether the resource allocation comprises a localized or distributed resource allocation is predefined or configured via a system information block or Radio Resource Control signaling.
8. The UE of claim 1, wherein:
whether the resource allocation comprises a localized or distributed resource allocation is indicated in the DCI format for a downlink assignment or an uplink grant.
9. The UE of claim 1, wherein:
the DCI format comprises a subcarrier block index and total number of subcarrier blocks configured to specify the resources within the PRB allocated to the UE.
10. The UE of claim 1, wherein:
the DCI format comprises a subcarrier bitmap configured to specify the resources within the PRB allocated to the UE, and one of:
each individual bit of the subcarrier bitmap corresponds to:
a unique one of the subcarriers, or
a unique block of subcarriers, each block of subcarriers comprising different subcarriers, or
a subcarrier block index whose values correspond to different blocks of subcarriers, each block of subcarriers comprising different subcarriers.
11. The UE of claim 1, wherein the processing circuitry is further configured to:
configure the transceiver to receive from the eNB a list of cell RNTIs (C-RNTIs) in an order for a plurality of UEs that comprises the UE,
configure the transceiver to receive a first resource allocation with a granularity of 1 PRB dependent on a common RNTI, the common RNTI one of predefined or provided by higher layers for scrambling of a physical downlink control channel, and
derive from the first resource allocation a dedicated subcarrier block based on the order of the received C-RNTI to obtain the resource allocation less than 1 PRB.
12. The UE of claim 1, wherein the processing circuitry is further configured to:
configure the transceiver to receive from the eNB frequency hopping information in a scheduling grant, the frequency hopping information comprising a subcarrier block index and total number of subcarrier blocks.
13. The UE of claim 1, wherein the processing circuitry is further configured to at least one of:
receive a DM-RS sequence generated by puncturing subcarriers not assigned to the UE, and
receive a DM-RS sequence generated using a base sequence of length less than 12.
14. The UE of claim 1, wherein:
the PRB comprises 6-7 Orthogonal Frequency Division Multiplexing (OFDM) symbols in time,
the wider and narrower subcarriers are 15 kHz and 7.5 kHz, respectively,
the UE is a Machine Type Communications (MTC) UE restricted to communicate with the eNB over a limited set of subcarriers of a bandwidth spectrum over which the eNB is able to communicate, and
the MTC UE is configured to transmit messages of a reduced size over the limited set of subcarriers in uplink transmissions.
15. The UE of claim 1, further comprising an antenna configured to transmit and receive communications between the transceiver and the eNB.
16. An apparatus of an eNode B (eNB), the apparatus comprising:
processing circuitry configured to:
configure a transceiver to transmit a downlink control information (DCI) configured to provide a resource allocation in a PRB of a subframe to a plurality of Machine Type Communications user equipments (MTC UEs), the resource allocation for each of the MTC UEs comprising a reduced physical resource block (PRBmin) of less than one PRB for at least one of downlink and uplink communications in the PRB, wherein the PRB comprises 12 wider subcarriers or 24 narrower subcarriers in frequency, the PRBmin comprises fewer than 12 wider subcarriers or fewer than 24 narrower subcarriers, and
wherein the eNB is configured to communicate with the MTC UEs using messages of a reduced size over subcarriers of the PRBmin.
17. The apparatus of claim 16, wherein at least one of:
the resource allocation for each UE within the PRB is one of:
a localized allocation throughout a slot of the subframe such that each subcarrier in the PRBmin is adjacent to another subcarrier in the PRBmin, and
a distributed allocation throughout a slot of the subframe such that each subcarrier in the PRBmin is adjacent to a subcarrier in another PRBmin, in the PRB, allocated to a different UE of the plurality of UEs, and
whether the resource allocation comprises a localized or distributed resource allocation is one of:
predefined or configured via a system information block or Radio Resource Control signaling, or
indicated in the DCI format.
18. The apparatus of claim 16, wherein:
the DCI format comprises a subcarrier bitmap configured to specify the resources within the PRB allocated to the UE, and one of:
each individual bit of the subcarrier bitmap corresponds to:
a unique one of the subcarriers, or
a unique block of subcarriers, each block of subcarriers comprising different subcarriers, or
a subcarrier block index whose values correspond to different blocks of subcarriers, each block of subcarriers comprising different subcarriers.
19. The apparatus of claim 16, wherein the processing circuitry is further configured to:
configure the transceiver to transmit to the UEs a list of cell RNTIs (C-RNTIs) in an order for the UEs, and
configure the transceiver to transmit a first resource allocation with a granularity of 1 PRB dependent on a common RNTI to the UEs, the common RNTI one of predefined or provided by higher layers for scrambling of a physical downlink control channel,
wherein a dedicated subcarrier block is derivable by the UEs from the first resource allocation based on the order of the received C-RNTI to obtain the resource allocation less than 1 PRB.
20. The apparatus of claim 16, wherein the processing circuitry is further configured to:
configure the transceiver to transmit to the UEs frequency hopping information in a scheduling grant, and
one of:
the frequency hopping information comprises a subcarrier block index and total number of subcarrier blocks, and
wherein whether a relative position of the resource allocation for each UE within the PRB between slots of the subframe remains the same or differs between the slots is one of:
predefined or configured via a system information block or Radio Resource Control signaling, or
indicated in the DCI format.
21. The apparatus of claim 16, further comprising the transceiver, the transceiver configured to transmit signals through a network and receive signals from the UE.
22. A non-transitory computer-readable storage medium that stores instructions for execution by one or more processors of a user equipment (UE) to configure the UE to communicate with an enhanced NodeB (eNB), the one or more processors to configure the UE to:
receive downlink control information (DCI) from the eNB, the DCI configured to provide a localized or distributed resource allocation comprising a reduced physical resource block (PRBmin) of less than 1 PRB for at least one of downlink (DL) and uplink (UL) communications in a PRB of a subframe,
wherein the PRB comprises 6-7 Orthogonal Frequency Division Multiplexing (OFDM) symbols in time and 12 15 kHz subcarriers or 24 7.5 kHz subcarriers in frequency,
wherein the PRBmin comprises fewer than 12 15 kHz subcarriers or fewer than 24 7.5 kHz subcarriers, and
wherein whether the resource allocation comprises a localized or distributed resource allocation is indicated in the DCI format.
23. The non-transitory computer-readable storage medium of claim 22, wherein:
the DCI format comprises a subcarrier block index and total number of subcarrier blocks configured to specify the resources within the PRB allocated to the UE, or
the DCI format comprises a bitmap for all subcarriers in which one of:
each individual bit of the bitmap corresponds to a unique block of subcarriers, each block of subcarriers comprising different subcarriers, the bitmap configured to specify the resources within the PRB allocated to the UE, or
a subcarrier block index whose values correspond to different blocks of subcarriers, each block of subcarriers comprising different subcarriers, the bitmap configured to specify the resources within the PRB allocated to the UE.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A sealed compressor comprising:
an electric component including a stator and a rotor;
a compression component actuated by the electric component; and
a sealed container accommodating the electric component and the compression component and storing lubricating oil for lubricating the compression component;
wherein the compression component includes a shaft including a main shaft section to which the rotor is fastened and an eccentric shaft section, a cylinder block accommodating a piston reciprocatable according to rotation of the shaft, a main bearing unit mounted on the cylinder block to support the main shaft section, and a thrust ball bearing disposed between a flange surface formed in the shaft and a thrust surface formed in the main bearing unit;
the main shaft section is provided with a first oil feeding passage to transport the lubricating oil from a lower portion of the main shaft section to an upper portion of the main shaft section;
the thrust ball bearing includes a plurality of balls held in a cage, an upper race disposed such that one of its main surfaces is in contact with upper portions of the balls; and
a lower race disposed such that one of its main surfaces is in contact with lower portions of the balls;
the main surface of the upper race and the main surface of the lower race face each other;
at least one of the main surface of the upper race and the main surface of the lower race, the main surfaces facing each other, is provided with a raceway groove which is formed by an annular groove, and in which the balls are placed; and
the thrust ball bearing is provided with a second oil feeding passage communicated with the first oil feeding passage and configured to feed the lubricating oil to the raceway groove and a discharge passage through which the lubricating oil fed to the raceway groove is discharged to outside of the thrust ball bearing.
2. The sealed compressor according to claim 1,
wherein the thrust surface is defined by an inner bottom surface of a recess formed in a main surface which is an upper surface of the main bearing unit; and
the main surface of the main bearing unit is disposed below a lower surface of the cage.
3. The sealed compressor according to claim 1,
wherein the thrust surface is provided with a discharge hole to discharge the lubricating oil.
4. The sealed compressor according to claim 1, further comprising:
a snubber provided at a lower portion of an electric and compression component including the electric component and the compression component;
a shell snubber provided at an inner bottom surface of the sealed container to face the snubber; and
a coil spring through which the snubber and the shell snubber are inserted, the coil spring being configured to elastically support the electric and compression component;
wherein a distance between a lower end portion of the shaft and an inner bottom surface of the sealed container is greater than a distance between a lower end of the snubber and an upper end of the shell snubber.
5. The sealed compressor according to claim 1,
wherein the cage has an inner diameter greater than an inner diameter of the upper race and an inner diameter of the lower race.
6. The sealed compressor according to claim 1, further comprising:
an inverter unit;
wherein the sealed compressor is actuated by the inverter unit by rotational speeds of two or more kinds, including a rotational speed lower than a power supply frequency.
7. A refrigeration unit comprising the sealed compressor according to claim 1.