# US 12,114,213 B2 · Device, system and method for handover with simultaneous UE transmission beams > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,114,213 B2 - Document ID: US12114213B2 - Status: Granted - Kind: B2 - Application number: 17/593,804 - Filed: 2020-05-08 - Published: 2022-06-09 - Granted: 2024-10-08 - Earliest claimed: 2019-05-10 - Assignees: Apple Inc. - Applicants: Apple Inc. - Inventors: Jie Cui; Zhibin Yu; Yang Tang; Qiming Li; Qing Xu - Web page: https://patentgrep.com/patent/US12114213B2 ## CPC - H04B 7/024: Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems - H04W 36/0072: {of resource information of target access point} - H04B 7/0404: the mobile station comprising multiple antennas, e.g. to provide uplink diversity - H04B 7/0617: {for beam forming} - H04B 7/10: Polarisation diversity; Directional diversity - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04W 36/06: Reselecting a communication resource in the serving access point - H04W 36/08: Reselecting an access point - H04W 36/085: {involving beams of access points} - H04W 36/13: {Cell handover without a predetermined boundary, e.g. virtual cells} - H04W 52/367: {Power values between minimum and maximum limits, e.g. dynamic range} - H04W 52/42: in systems with time, space, frequency or polarisation diversity - H04W 36/00695: {using split of the control plane or user plane} - H04B: TRANSMISSION - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A user equipment (UE) in a wireless network including a first next generation NodeB (gNB) and a second gNB for communicating with the UE performs operations. The operations include determining to transmit a first transmission (Tx) stream and a second Tx stream simultaneously to the first gNB and the second gNB for handing over communication with the UE from a first cell to a second cell, wherein the first gNB is a serving gNB in the first cell and the second gNB is a handover target gNB in the second cell and simultaneously transmitting within a same antenna panel of the UE the first transmission stream to the first gNB using a first polarization and the second transmission stream to the second gNB using a second polarization different from the first polarization. ## Claims ### Claim 1 A method, comprising: at a user equipment (UE) in a wireless network including a first next generation NodeB (gNB) and a second gNB for communicating with the UE: determining to transmit a first transmission (Tx) stream and a second Tx stream simultaneously to the first gNB and the second gNB for handing over communication with the UE from a first cell to a second cell, wherein the first gNB is a serving gNB in the first cell and the second gNB is a handover target gNB in the second cell; and simultaneously transmitting within a same antenna panel of the UE the first transmission stream to the first gNB using a first polarization and the second transmission stream to the second gNB using a second polarization different from the first polarization. ### Claim 2 (depends on 1) The method of claim 1, wherein each of the first and second Tx polarizations are configured with independent Tx beam patterns and associated with different Rx beam patterns from one of the first or second gNBs. ### Claim 3 (depends on 1) The method of claim 1, further comprising: calculating a transmission power for each of the first and second Tx streams separately, wherein, for each calculated transmission power, the UE applies a 3 dB down-scaling of a maximal transmission power limit. ### Claim 4 (depends on 1) The method of claim 1, further comprising: determining a phase offset setting between the first and second Tx polarizations based on UL interference measurements. ### Claim 5 (depends on 1) The method of claim 1, wherein one of the first or second gNB restrict an uplink (UL) channel scheduling by triggering a UL transmission with only a single port. ### Claim 6 (depends on 5) The method of claim 5, wherein the one of the first or second gNB allocates a DCI format 0_1 to trigger a PUSCH transmission by the UE. ### Claim 7 (depends on 1) The method of claim 1, further comprising: skipping a transmission of one of the first or second Tx streams based on a predefined rule, wherein the predefined rule is based on a channel type of one of the first or second Tx streams. ### Claim 8 (depends on 1) The method of claim 1, wherein the handing over the communication with the UE from the first cell to the second cell is one of an intra-frequency handover or an inter-frequency handover. ### Claim 9 (depends on 1) The method of claim 1, wherein the first cell and the second cell are dis-located. ### Claim 10 A user equipment (UE), comprising: a plurality of antenna panels, each antenna panel comprising a plurality of antenna elements; a processor configured to determine to transmit a first transmission (Tx) stream and a second Tx stream simultaneously to a first next generation NodeB (gNB) and a second gNB for handing over communication with the UE from a first cell to a second cell, wherein the first gNB is a serving gNB in the first cell and the second gNB is a handover target gNB in the second cell; and a transceiver configured to simultaneously transmit via a same antenna panel of the UE the first transmission stream to the first gNB using a first TX polarization and the second transmission stream to the second gNB using a second TX polarization different from the first Tx polarization. ### Claim 11 (depends on 10) The UE of claim 10, wherein the UE supports only a single active antenna panel. ### Claim 12 (depends on 10) The UE of claim 10, wherein the transceiver comprises a plurality of Tx polarization circuities and the first and second transmission streams are transmitted by different Tx polarization circuities. ### Claim 13 (depends on 10) The UE of claim 10, wherein each of the first and second Tx polarizations are configured with independent Tx beam patterns and associated with different Rx beam patterns from one of the first or second gNBs. ### Claim 14 (depends on 10) The UE of claim 10, wherein the processor is further configured to calculate a transmission power for each of the first and second Tx streams separately, wherein, for each calculated transmission power, the UE applies a 3 dB down-scaling of a maximal transmission power limit. ### Claim 15 A method, comprising: at a first next generation NodeB (gNB) in a first cell for communicating with a user equipment (UE) in a wireless network including the UE and a second gNB in a second cell for communicating with the UE: allocating a Downlink Control Information (DCI) format 0_1 for triggering a Physical Uplink Shared Channel (PUSCH) transmission by the UE; triggering the PUSCH transmission by the UE; receiving a transmission (Tx) stream from the UE, wherein the Tx stream is a first transmission (Tx) stream using a first polarization or a second Tx stream using a second polarization simultaneously sent to the first gNB and the second gNB within a same antenna panel of the UE; and restricting an uplink (UL) channel scheduling by triggering the PUSCH transmission with a single port. ### Claim 16 (depends on 15) The method of claim 15, wherein an SRI within the DCI is selected to be associated with a single port Sounding Reference Signal (SRS) resource. ### Claim 17 (depends on 16) The method of claim 16, wherein the first gNB or the second gNB contains two ports. ### Claim 18 (depends on 15) The method of claim 15, wherein the first Tx stream and the second Tx stream are in frequency range FR2. ### Claim 19 (depends on 15) The method of claim 15, wherein the first cell and the second cell are dislocated.