Downlink multiplexing

• US 10,334,620 B2
• Filed: 08/24/2017
• Issued: 06/25/2019
• Est. Priority Date: 08/14/2007
• Status: Active Grant

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Ahluwalia, Jagdeep Singh, Awad, Yassin Aden
• Primary Examiner(s): Mesfin, Yemane
• Assistant Examiner(s): Baron, Henry
• Application Number:
  US15/685,501
• Publication Number:
  US 20170353968A1
• Time in Patent Office: 670 Days
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1822 involving configuration of automatic repeat request [ARQ] with parallel processes
• CPC Class Codes: H04L 1/1864 ARQ related signaling H04L1/1607 takes precedence
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/1893 Physical mapping arrangements physical resource mapping in general H04L5/00
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/12 Wireless traffic scheduling
• CPC Class Codes: H04W 72/1273 of downlink data flows
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

A mobile station which communicates with a base station includes a transceiver configured to receive a downlink control channel and a controller configured to determine whether C-RNTI is included in the downlink control channel. The controller is further configured to determine that resource allocation in the downlink control channel overrides persistent downlink resource allocation for a Transmission Time Interval (TTI) if the C-RNTI is included in the downlink control channel. The transceiver is further configured to receive a Hybrid Automatic Repeat Request (HARQ) transmission by using persistent downlink resources.

Claims

1. A method in a user equipment (UE) which communicates in a downlink with a base station of an Evolved Universal Mobile Telecommunications System Terrestrial Radio Access Network (E-UTRAN), the method comprising:

receiving, via a downlink control channel, from the E UTRAN, a persistent allocation of persistent downlink resources for hybrid automatic repeat request (HARQ) transmissions to the UE, that can be used both for a given transmission time interval (TTI) and for future TTIs at a periodic interval;

determining whether at least one parameter in the downlink control channel is set to a specific bit pattern;

performing a validation for the persistent allocation on the downlink control channel, wherein the validation is achieved if the at least one parameter is set to the specific bit pattern;

receiving, via the downlink control channel, from the E-UTRAN, a dynamic allocation of downlink resources; and

determining whether a cell radio network temporary identifier (C-RNTI) is present on the downlink control channel for a TTI for which the UE has persistent downlink resources and, when the C-RNTI is present, determining that a resource allocation indicated on the downlink control channel for that TTI overrides the persistent allocation for that TTI so that the UE does not decode persistent downlink resources.

2. A method according to the claim 1, wherein the at least one parameter is a HARQ (Hybrid Automatic Repeat Request) process number.

3. A method according to the claim 1, wherein the at least one parameter is a modulation and coding scheme.

4. A user equipment (UE) which communicates in a downlink with a base station of an Evolved Universal Mobile Telecommunications System Terrestrial Radio Access Network (E-UTRAN), the UE comprising:

a transceiver configured to receive, from the E-UTRAN, a persistent allocation of persistent downlink resources for hybrid automatic repeat request (HARQ) transmissions to the UE, that can be used both for a given transmission time interval (TTI) and for future TTIs at a periodic interval; and

a processor configured to;

determine whether at least one parameter in a downlink control channel is set to a specific bit pattern, and

perform a validation for the persistent allocation on the downlink control channel, wherein the validation is achieved if the at least one parameter is set to the specific bit pattern;

wherein the transceiver is further configured to receive, via the downlink control channel, from the E-UTRAN, a dynamic allocation of downlink resources; and

wherein the processor is further configured to determine whether a cell radio network temporary identifier (C-RNTI) is present on the downlink control channel for a TTI for which the UE has persistent downlink resources and, when the C-RNTI is present, determining that a resource allocation indicated on the downlink control channel for that TTI overrides the persistent allocation for that TTI so that the UE does not decode persistent downlink resources.

5. A method in a base station of an Evolved Universal Mobile Telecommunications System Terrestrial Radio Access Network (E-UTRAN) which communicates in a downlink with a user equipment (UE), the method comprising:

determining whether at least one parameter in a downlink control channel is to be set to a specific bit pattern;

transmitting, via the downlink control channel to the UE, a persistent allocation of persistent downlink resources for hybrid automatic repeat request (HARQ) transmissions to the UE, that can be used both for a given transmission time interval (TTI) and for future TTIs at a periodic interval; and

transmitting a dynamic allocation of downlink resources via a cell radio network temporary identifier (C-RNTI) on the downlink control channel;

wherein the at least one parameter is used by the UE to perform a validation for the persistent allocation on the downlink control channel, wherein the validation is achieved if the at least one parameter is set to the specific bit pattern; and

wherein, when the C-RNTI is present on the downlink control channel for a TTI for which the UE has persistent downlink resources, the C-RNTI is used by the UE to determine that a resource allocation indicated on the downlink control channel for that TTI overrides the persistent allocation for that TTI so that the UE does not decode persistent downlink resources.

6. A method according to the claim 5, wherein the at least one parameter is a HARQ (Hybrid Automatic Repeat Request) process number.

7. A method according to the claim 6, wherein the at least one parameter is a modulation and coding scheme.

8. A base station of an Evolved Universal Mobile Telecommunications System Terrestrial Radio Access Network (E-UTRAN) which communicates in a downlink with a user equipment (UE), the base station comprising:

a processor configured to determine whether at least one parameter in a downlink control channel is to be set to a specific bit pattern; and

a transceiver circuit configured to;

transmit, via the downlink control channel to the UE, a persistent allocation of persistent downlink resources for hybrid automatic repeat request (HARQ) transmissions to the UE, that can be used both for a given transmission time interval (TTI) and for future TTIs at a periodic interval; and

transmit a dynamic allocation of downlink resources via a cell radio network temporary identifier (C-RNTI) on the downlink control channel,

wherein the at least one parameter is used by the UE to perform a validation for the persistent allocation on the downlink control channel, wherein the validation is achieved if the at least one parameter is set to the specific bit pattern; and

wherein, when the C-RNTI is present on the downlink control channel for a TTI for which the UE has persistent downlink resources, the C-RNTI is used by the UE to determine that a resource allocation indicated on the downlink control channel for that TTI overrides the persistent allocation for that TTI so that the UE does not decode persistent downlink resources.