摘要:
A method in a user equipment for deciding whether or not to send an uplink transmission (ie. Channel State Information, CSI, and/or Sounding Reference Signal, SRS) to a radio access network node (Node B) is provided. The user equipment and radio access network node (Node B) are comprised in a communications network. The user equipment is configured with Discontinuous Reception, DRX, to be in active time or not be in active time. The user equipment decides (201) whether or not to send the uplink transmission at a transmission time t, based on whether the user equipment was in active time or not at a predefined earlier time instance relative to the transmission time t.
摘要:
Systems and methods avoid the need to coordinate preambles between UEs performing random access on their PCells and SCells. According to an embodiment, a method for random access in a radio communication system includes: transmitting, by a network node, a random access response including a Radio Network Temporary Identifier (RNTI) which has a first value if the random access is associated with a first cell and a second value if the random access is associated with a second cell, the first value being different than the second value and the first cell being different from the second cell.
摘要:
A radio network node (RNN) (202) and a method therein, for handling of changing primary cell from a first cell (204) to a second cell (206) during re-selection of primary cell of a user equipment (UE) (208). The RNN is configured to serve the first cell, the UE is located within the first cell and is served by the RNN, and RNN and the UE are comprised in a communications system (200). The RNN transmits an RRCConnectionReconfiguration signal to the UE, which signal comprises an indication that the UE does not need to perform a random access procedure for the second cell when changing primary cell from the first cell to the second cell.
摘要:
In an LTE network (10) employing carrier aggregation, a cross-scheduled UE (16) may initiate a random access procedure on a secondary component carrier (SCC) by transmitting a random preamble on the UL SCC PRACH. Contrary to normal cross-scheduling procedure—in which the UE (16) reads PDCCH on PCC and PDSCH on SCC using a provisioned pdsch-Start parameter—the UE (16) reads PCFICH directly on the DL SCC to obtain the CFI. The UE (16) uses the DL SCC CFI to access the PDSCH to read a message from the network (10) specifying a timing advance value for the UE (16) to use on UL SCC. For other DL SCC traffic, the UE (16) reads the DL PCC PDCCH and uses the pdsch-Start parameter to locate PDSCH on SCC.
摘要:
A method in a user equipment for deciding whether or not to send an uplink transmission (ie. Channel State Information, CSI, and/or Sounding Reference Signal, SRS) to a radio access network node (Node B) is provided. The user equipment and radio access network node (Node B) are comprised in a communications network. The user equipment is configured with Discontinuous Reception, DRX, to be in active time or not be in active time. The user equipment decides (201) whether or not to send the uplink transmission at a transmission time t, based on whether the user equipment was in active time or not at a predefined earlier time instance relative to the transmission time t.
摘要:
A radio network node (RNN) (202) and a method therein, for handling of changing primary cell from a first cell (204) to a second cell (206) during re-selection of primary cell of a user equipment (UE) (208). The RNN is configured to serve the first cell, the UE is located within the first cell and is served by the RNN, and RNN and the UE are comprised in a communications system (200). The RNN transmits an RRCConnectionReconfiguration signal to the UE, which signal comprises an indication that the UE does not need to perform a random access procedure for the second cell when changing primary cell from the first cell to the second cell.
摘要:
Methods and systems present solutions to, for example, the problem of unnecessary preparedness for suspended retransmissions in the user equipment (UE) which contributes to power drain in the device battery. One method for monitoring a Physical Downlink Control Channel (PDCCH) for adaptive retransmission grants in a radio communication system includes: monitoring, by a user equipment (UE), the PDCCH for adaptive retransmission grants; receiving, by the UE, a hybrid automatic repeat request (HARQ) acknowledge (ACK) message, and ceasing, by the UE, to monitor the PDCCH for adaptive retransmission grants after receipt of the HARQ ACK message.
摘要:
Some of the example embodiments presented herein are directed towards a user equipment (501), and corresponding method therein, for uplink timing alignment. The user equipment (501) may initiate a timing advance value to zero during a creation of a timing advance group, a modification of a timing advance group, or if a TAC MAC CE command has not been performed. The user equipment (501) may further update the timing advance value based on a received TAC MAC CE command.Some of the example embodiments presented herein are directed towards a base station, and corresponding method therein, for uplink timing alignment. The base station (401) may be configured to estimate a proximity of the user equipment (501) to an uplink receive or an uplink cell size of the user equipment. The base station may determine a TAC MAC CE based on the estimation and send the TAC MAC CE to the user equipment (501) for uplink timing alignment.
摘要翻译:本文提出的一些示例性实施例针对用于上行链路定时对准的用户设备(501)及其中的相应方法。 用户设备(501)可以在创建定时提前组,定时提前组的修改或者还没有执行TAC MAC CE命令时启动定时提前值为零。 用户设备(501)还可以基于所接收的TAC MAC CE命令更新定时提前值。 这里呈现的一些示例实施例针对基站,以及其中的相应方法,用于上行链路定时对准。 基站(401)可以被配置为估计用户设备(501)与用户设备的上行链路接收或上行链路小区大小的接近度。 基站可以基于估计来确定TAC MAC CE,并将TAC MAC CE发送给用户设备(501)以进行上行链路定时对准。
摘要:
Systems and methods avoid the need to coordinate preambles between UEs performing random access on their PCells and SCells. According to an embodiment, a method for random access in a radio communication system includes: transmitting, by a network node, a random access response including a Radio Network Temporary Identifier (RNTI) which has a first value if the random access is associated with a first cell and a second value if the random access is associated with a second cell, the first value being different than the second value and the first cell being different from the second cell.