JP-7855786-B2 - Multiple time alignment timers

Inventors

• マタ ドゥゲル
• ケース サリヤ ヤヤシンゲ ラドゥ

Assignees

• ノキア テクノロジーズ オサケユイチア

Dates

Publication Date

20260508

Application Date

20230713

Priority Date

20220722

Claims (5)

1. At least one processor, When executed by the aforementioned at least one processor, the device will have The determination of whether or not to flush the Hybrid Automatic Retransmission Request (HARQ) buffer based on the expiration of at least one of at least two time alignment timers, Of the at least two time alignment timers, the first time alignment timer is associated with the first timing advance group, and the second time alignment timer is associated with the second timing advance group. The HARQ buffer corresponds to the first timing advance group and the second timing advance group, and the first timing advance group and the second timing advance group are secondary timing advance groups, to be determined. A memory device that stores at least one instruction that causes the execution of a certain function, The command causes the device to flush the HARQ buffer in response to not receiving a timing advance command corresponding to the second timing advance group after the first time alignment timer has expired and before the second time alignment timer has expired. Device.
2. The first timing advance group corresponds to at least one of the first transmission/reception point, the first cell identity, or the first control resource set pool index. The second timing advance group corresponds to at least one of the second transmission/reception point, the second cell identity, or the second control resource set pool index. The apparatus according to claim 1.
3. The apparatus according to claim 1 or 2, wherein the apparatus includes user equipment or is provided within user equipment.
4. The determination of whether or not to flush the Hybrid Automatic Retransmission Request (HARQ) buffer based on the expiration of at least one of at least two time alignment timers, Of the at least two time alignment timers, the first time alignment timer is associated with the first timing advance group, and the second time alignment timer is associated with the second timing advance group. The HARQ buffer corresponds to the first timing advance group and the second timing advance group, and the first timing advance group and the second timing advance group are secondary timing advance groups, and this is determined. After the first time alignment timer expires and before the second time alignment timer expires, in response to not receiving a timing advance command corresponding to the second timing advance group, the HARQ buffer is flushed. A method that includes this.
5. When performed by the device, the device determines whether or not to flush the Hybrid Automatic Retransmission Request (HARQ) buffer based on the expiration of at least one of the at least two time alignment timers, Of the at least two time alignment timers, the first time alignment timer is associated with the first timing advance group, and the second time alignment timer is associated with the second timing advance group. The HARQ buffer corresponds to the first timing advance group and the second timing advance group, and the first timing advance group and the second timing advance group are secondary timing advance groups, and this is determined. After the first time alignment timer expires and before the second time alignment timer expires, in response to not receiving a timing advance command corresponding to the second timing advance group, the HARQ buffer is flushed. A non-temporary computer-readable storage medium containing program instructions that cause at least the execution of a program.

Description

The following exemplary embodiments relate to wireless communication. In wireless communication systems, user equipment can apply timing advance to adjust the timing of uplink frames to match downlink frames in the time domain. However, there is a challenge in how to apply timing advance when, for example, user equipment transmits to at least two transmission/reception points simultaneously. The scope of protection required for various exemplary embodiments is defined by the independent claims. Where any exemplary embodiments and features described herein are not covered by the independent claims, they are to be interpreted as useful examples for understanding various embodiments. According to one embodiment, a device is provided comprising at least one processor and at least one memory that, when executed by the at least one processor, stores instructions causing the device to determine whether or not to flush one or more Hybrid Automatic Retransmission Request (HARQ) buffers based on the expiration of at least one of two time alignment timers. In another embodiment, a device is provided comprising means for determining whether or not to flush one or more Hybrid Automatic Retransmission Request (HARQ) buffers based on the expiration of at least one of at least two time alignment timers. In another embodiment, a method is provided that includes determining whether to flush one or more Hybrid Automatic Retransmission Request (HARQ) buffers based on the expiration of at least one of at least two time alignment timers. In another embodiment, a computer program is provided, when executed by the device, that causes the device to at least determine whether or not to flush one or more Hybrid Automatic Retransmission Request (HARQ) buffers based on the expiration of at least one of two time alignment timers. In another embodiment, the device is provided with a computer-readable medium containing program instructions that, when executed by the device, cause the device to determine whether or not to flush one or more Hybrid Automatic Retransmission Request (HARQ) buffers based on the expiration of at least one of two time alignment timers. In another embodiment, the device is provided with a non-temporary computer-readable medium containing program instructions that, when executed by the device, cause the device to determine whether or not to flush one or more Hybrid Automatic Retransmission Request (HARQ) buffers based on the expiration of at least one of two time alignment timers. In the following sections, various exemplary embodiments will be described in more detail with reference to the attached drawings. Figure 1 shows an example of a cellular communication network. Figure 2 illustrates the concept of timing advance. Figure 3 shows simultaneous (or parallel) multi-panel uplink transmission. Figure 4 shows a flowchart according to an exemplary embodiment. Figure 5 shows an example of an exemplary embodiment. Figure 6 shows a flowchart according to an exemplary embodiment. Figure 7 shows a flowchart according to an exemplary embodiment. Figure 8 shows a flowchart according to an exemplary embodiment. Figure 9 shows a flowchart according to an exemplary embodiment. Figure 10 shows a flowchart according to an exemplary embodiment. Figure 11 shows a flowchart according to an exemplary embodiment. Figure 12 shows an example of an exemplary embodiment. Figure 13 shows a flowchart according to an exemplary embodiment. Figure 14 shows an exemplary embodiment of the apparatus. The following embodiments are illustrative. While this specification may refer to “a certain,” “one,” or “several” embodiments in several places, this does not necessarily mean that each reference is made to the same embodiment, or that certain features apply only to a single embodiment. Other embodiments may also be provided by combining single features from different embodiments. In the following, without limiting the exemplary embodiments to such architectures, various exemplary embodiments will be described using wireless access architectures based on Long-Term Evolution Advanced (LTE Advanced, LTE-A), New Radio (NR, 5G), Beyond 5G, or 6th Generation (6G) as examples of access architectures to which the exemplary embodiments may be applied. It will be apparent to those skilled in the art that the exemplary embodiments may also be applicable to other types of communication networks with appropriate means by appropriately adjusting parameters and procedures. Other suitable system options include Universal Mobile Communications Systems (UMTS), Radio Access Networks (UTRAN or E-UTRAN), Long-Term Evolution (LTE, substantially the same as E-UTRA), Wireless Local Area Networks (WLAN or Wi-Fi®), Global Interoperability Microwave Access (WiMAX), Bluetooth®, Personal Communication Services (PCS), ZigBee®, Wideband Code Division Multiple Access (WCDMA®), systems using ultra-wideband (UWB) technology, sensor networks, mobile ad-hoc networks (MANETs), Inte