Method and apparatus for signaling procedure

Abstract

Apparatus and methods for a signaling process are disclosed. An example method may include transmitting a first portion of a signaling message in a first subband; and transmitting a second portion of the signaling message in a second subband, the second portion including an indication that the first portion was transmitted in the first subband. Related apparatus and computer-readable media are also disclosed.

Description

Technical Field

[0001] Various example embodiments are directed to methods and apparatus for signaling procedures. Background Art

[0002] Interference detection such as listen before talk (LBT or sometimes called listen before talk) can be used in radio communications, whereby, for example, in unlicensed spectrum, a radio transmitter can sense its radio environment before it starts transmitting, and frequency diversity techniques can be applied to address the performance degradation associated with interference detection failures. Summary of the Invention

[0003] In a first aspect, a method is disclosed. The method may include transmitting a first portion of a signaling message in a first subband; and transmitting a second portion of the signaling message in a second subband, the second portion including an indication of the first portion transmitted in the first subband.

[0004] In some example embodiments, in a case where interference detection on the second sub-band is passed, the second sub-band is different from the first sub-band.

[0005] In some example embodiments, the method may further comprise monitoring a response to the signaling message from an access network on a plurality of subbands including at least the first subband and the second subband.

[0006] In some example embodiments, the first portion comprises a preamble for a random access procedure, and the second portion further comprises a data portion of the random access procedure.

[0007] In some example embodiments, the indication comprises a mapping between preambles in the first portion of the first subband and demodulation reference signal ports used to transmit the second portion.

[0008] In some example embodiments, in the event that interference detection fails on a subband or subbands other than the first subband, the second portion is transmitted in the first subband instead.

[0009] In a second aspect, a method is disclosed. The method may include: receiving a first part of a signaling message in a first subband; receiving a second part of the signaling message in a second subband, the second part including an indication of the first part received in the first subband; and determining, based on the indication, that the first part in the first subband and the second part in the second subband are from the same user equipment.

[0010] In some example embodiments, the method may further comprise preparing a response to the user equipment signaling message on a plurality of subbands including the first subband and the second subband, if the second subband is different from the first subband.

[0011] In some example embodiments, the method may further comprise, in a case where interference detection on at least one sub-band is passed, transmitting the response in the at least one sub-band among the plurality of sub-bands.

[0012] In some example embodiments, the first portion comprises a preamble for a random access procedure, and the second portion further comprises a data portion of the random access procedure.

[0013] In some example embodiments, the indication comprises a mapping between preambles in the first portion of the first subband and demodulation reference signal ports used to transmit the second portion.

[0014] In some example embodiments, based on the mapping, the first portion and the second portion are determined to be from the same user equipment.

[0015] In some example embodiments, the method may further comprise preparing a response to the user equipment signaling message on the first subband in a case where the second subband is the same as the first subband, or in a case where detection of the indication in the second portion of the second subband fails.

[0016] In a third aspect, an apparatus is disclosed. The apparatus may include at least one processor and at least one memory including computer program code, wherein the at least one memory and the computer program code may be configured, with the at least one processor, to cause the apparatus to: transmit a portion of a signaling message in a first subband; and transmit a second portion of the signaling message in a second subband, the second portion including an indication of the first portion transmitted in the first subband.

[0017] In some example embodiments, in a case where interference detection of the second sub-band passes, the second sub-band is different from the first sub-band.

[0018] In some example embodiments, the at least one memory and the computer program code may be further configured, with the at least one processor, to cause the apparatus to perform: monitoring, on a plurality of subbands including at least the first subband and the second subband, a response to the signaling message from an access network.

[0019] In some example embodiments, the first portion comprises a preamble for a random access procedure, and the second portion further comprises a data portion of the random access procedure.

[0020] In some example embodiments, the indication comprises a mapping between preambles in the first portion of the first subband and demodulation reference signal ports used to transmit the second portion.

[0021] In some example embodiments, in the event that interference detection fails on a subband or subbands other than the first subband, the second portion is transmitted in the first subband instead.

[0022] In a fourth aspect, an apparatus is disclosed. The apparatus may include at least one processor and at least one memory, the at least one memory including computer program code, wherein the at least one memory and the computer program code may be configured, together with the at least one processor, to cause the apparatus to: receive a first part of a signaling message in a first subband; receive a second part of a signaling message in a second subband, the second part including an indication of the first part received in the first subband; and determine, based on the indication, that the first part in the first subband and the second part in the second subband are from the same user equipment.

[0023] In some example embodiments, the at least one memory and the computer program code may be further configured, with the at least one processor, to cause the apparatus to perform: preparing a response to the user equipment signaling message on a plurality of subbands including the first subband and the second subband, if the second subband is different from the first subband.

[0024] In some example embodiments, the at least one memory and the computer program code may be further configured, with the at least one processor, to cause the apparatus to perform: transmitting the response in the at least one subband among the plurality of subbands if the interference detection on the at least one subband passes.

[0025] In some example embodiments, the first portion comprises a preamble for a random access procedure, and the second portion further comprises a data portion for the random access procedure.

[0026] In some example embodiments, the indication comprises a mapping between preambles in the first portion of the first subband and demodulation reference signal ports used to transmit the second portion.

[0027] In some example embodiments, based on the mapping, the first portion and the second portion are determined to be from the same user equipment.

[0028] In some example embodiments, the at least one memory and the computer program code may be further configured, with the at least one processor, to cause the apparatus to perform: preparing a response to the user equipment signaling message on the first subband if the second subband is the same as the first subband or if detection of the indication in the second portion of the second subband fails.

[0029] In a fifth aspect, a computer-readable medium is disclosed comprising instructions stored thereon for causing an apparatus to execute: transmitting a first portion of a signaling message in a first subband and transmitting a second portion of the signaling message in a second subband, the second portion comprising an indication of the first portion transmitted in the first subband.

[0030] In some example embodiments, in a case where interference detection of the second sub-band passes, the second sub-band is different from the first sub-band.

[0031] In some example embodiments, the instructions may further cause the apparatus to perform: monitoring a response to the signaling message from an access network on a plurality of subbands including at least first and second subbands.

[0032] In some example embodiments, the first portion comprises a preamble for a random access procedure, and the second portion further comprises a data portion of the random access procedure.

[0033] In some example embodiments, the indication comprises a mapping between preambles in the first portion of the first subband and demodulation reference signal ports used to transmit the second portion.

[0034] In some example embodiments, in the event that interference detection fails in a subband or subbands other than the first subband, the second portion is transmitted in the first subband instead.

[0035] In a sixth aspect, a computer-readable medium comprising instructions stored thereon is disclosed, configured to cause an apparatus to perform: receiving a first portion of a signaling message in a first subband; receiving a second portion of a signaling message in a second subband, the second portion comprising an indication of the first portion received in the first subband; and determining, based on the indication, that the first portion in the first subband and the second portion in the second subband are from the same user equipment.

[0036] In some example embodiments, the instructions may further cause the apparatus to perform: if the second subband is different from the first subband, preparing a response to the user equipment signaling message on a plurality of subbands including the first subband and the second subband.

[0037] In some example embodiments, the instructions may further cause the apparatus to perform: if the interference detection of the at least one sub-band passes, transmitting the response in the at least one sub-band among the plurality of sub-bands.

[0038] In some example embodiments, the first portion includes a preamble for a random access procedure, and the second portion further includes a data portion for a random access procedure.

[0039] In some example embodiments, the indication comprises a mapping between preambles in the first portion of the first subband and demodulation reference signal ports used to transmit the second portion.

[0040] In some example embodiments, based on the mapping, the first portion and the second portion are determined to be from the same user equipment.

[0041] In some example embodiments, the instructions may further cause the apparatus to perform, in a case where the second subband is the same as the first subband, or in a case where detection of the indication in the second portion in the second subband fails, preparing a response to the user equipment signaling message in the first subband.

[0042] In a seventh aspect, an apparatus is disclosed. The apparatus may include means for transmitting a first portion of a signaling message in a first subband, and means for transmitting a second portion of the signaling message in a second subband, the second portion including an indication of the first portion transmitted in the first subband.

[0043] In some example embodiments, in a case where interference detection on the second sub-band is passed, the second sub-band is different from the first sub-band.

[0044] In some example embodiments, the apparatus may further comprise means for monitoring a response to the signaling message from an access network on a plurality of subbands including at least the first subband and the second subband.

[0045] In some example embodiments, the first portion comprises a preamble for a random access procedure, and the second portion further comprises a data portion of the random access procedure.

[0046] In some example embodiments, the indication comprises a mapping between preambles in the first portion of the first subband and demodulation reference signal ports used to transmit the second portion.

[0047] In some example embodiments, in the event that interference detection fails in a subband or subbands other than the first subband, the second portion is transmitted in the first subband instead.

[0048] In an eighth aspect, a device is disclosed. The device may include: means for receiving a first part of a signaling message in a first subband; means for receiving a second part of the signaling message in a second subband, the second part including an indication of the first part received in the first subband; and means for determining, based on the indication, that the first part in the first subband and the second part in the second subband are from the same user equipment.

[0049] In some example embodiments, the apparatus may further comprise means for preparing a response to the user equipment signalling message in a plurality of subbands including the first subband and the second subband, if the second subband of the second portion is different from the first subband of the first portion.

[0050] In some example embodiments, the apparatus may further comprise means for transmitting the response in at least one sub-band among the plurality of sub-bands if interference detection of the at least one sub-band is passed.

[0051] In some example embodiments, the first portion comprises a preamble for a random access procedure, and the second portion further comprises a data portion of the random access procedure.

[0052] In some example embodiments, the indication comprises a mapping between preambles in the first portion of the first subband and demodulation reference signal ports used to transmit the second portion.

[0053] In some example embodiments, based on the mapping, the first portion and the second portion are determined to be from the same user equipment.

[0054] In some example embodiments, the apparatus may further comprise means for preparing a response to the user equipment signalling message on the first subband in a case where the second subband is the same as the first subband, or in a case where detection of the indication in the second part of the second subband fails.

[0055] In a ninth aspect, an apparatus is disclosed. The apparatus may include: circuitry configured to transmit a first portion of a signaling message in a first subband; and circuitry configured to transmit a second portion of the signaling message in a second subband, the second portion including an indication of the first portion transmitted in the first subband.

[0056] In some example embodiments, in a case where interference detection of the second sub-band passes, the second sub-band is different from the first sub-band.

[0057] In some example embodiments, the apparatus may further comprise circuitry configured to monitor a response to the signaling message from an access network on a plurality of subbands including at least the first subband and the second subband.

[0058] In some example embodiments, the first portion comprises a preamble for a random access procedure, and the second portion further comprises a data portion of the random access procedure.

[0059] In some example embodiments, the indication comprises a mapping between preambles in the first portion of the first subband and demodulation reference signal ports used to transmit the second portion.

[0060] In some example embodiments, in the event that interference detection fails in a subband or subbands other than the first subband, the second portion is transmitted in the first subband instead.

[0061] In a tenth aspect, an apparatus is disclosed. The apparatus may include: circuitry configured to receive a first portion of a signaling message in a first subband; circuitry configured to receive a second portion of a signaling message in a second subband, the second portion including an indication of the first portion received in the first subband; and circuitry configured to determine, based on the indication, that the first portion in the first subband and the second portion in the second subband are from the same user equipment.

[0062] In some example embodiments, the apparatus may further comprise: circuitry configured to, if the second subband of the second portion is different from the first subband of the first portion, prepare a response to the user equipment signaling message on a plurality of subbands including the first subband and the second subband.

[0063] In some example embodiments, the apparatus may further comprise: a circuit configured to, if interference detection of the at least one sub-band is passed, transmit the response in the at least one sub-band among the plurality of sub-bands.

[0064] In some example embodiments, the first portion comprises a preamble for a random access procedure, and the second portion further comprises a data portion of the random access procedure.

[0065] In some example embodiments, the indication comprises a mapping between preambles in the first portion of the first subband and demodulation reference signal ports used to transmit the second portion.

[0066] In some example embodiments, based on the mapping, the first portion and the second portion are determined to be from the same user equipment.

[0067] In some example embodiments, the apparatus may further comprise: circuitry configured to, in a case where the second subband is the same as the first subband, or in a case where detection of the indication in the second portion of the second subband fails, prepare a response to the user equipment signaling message on the first subband. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] Some example embodiments will now be described by way of non-limiting examples with reference to the accompanying drawings.

[0069] Figure 1 An example 2-step random access procedure is illustrated.

[0070] Figure 2 An example of utilizing a plurality of sub-bands according to example embodiments is illustrated.

[0071] Figure 3 Another example of utilizing a plurality of sub-bands according to example embodiments is illustrated.

[0072] Figure 4 An example of a plurality of sub-bands according to example embodiments is illustrated.

[0073] Figure 5 An example scenario utilizing multiple sub-bands according to an example embodiment is illustrated.

[0074] Figure 6 An example of utilizing a plurality of sub-bands according to example embodiments is illustrated.

[0075] Figure 7 An example mapping according to an example embodiment is illustrated.

[0076] Figure 8 Another example mapping according to an example embodiment is illustrated.

[0077] Figure 9 Illustrated are example states of a UE according to example embodiments.

[0078] Figure 10Another example scenario utilizing multiple sub-bands according to an example embodiment is illustrated.

[0079] Figure 11 An example method according to an example embodiment is illustrated.

[0080] Figure 12 Another example method according to an example embodiment is illustrated.

[0081] Figure 13 An example apparatus according to an example embodiment is illustrated.

[0082] Figure 14 Another example apparatus according to an example embodiment is illustrated.

[0083] Figure 15 An example method according to an example embodiment is illustrated.

[0084] Figure 16 Another example method according to an example embodiment is illustrated.

[0085] Figure 17 An example apparatus according to an example embodiment is illustrated.

[0086] Figure 18 Another example apparatus according to an example embodiment is illustrated. DETAILED DESCRIPTION

[0087] Examples of subbands herein may include, but are not limited to, component carriers (CCs) and bandwidth parts (BWPs), or each BWP or CC may have multiple subbands for wideband operation.

[0088] Signaling procedures, such as random access (RA) procedures and other procedures performed in sequence protocols, may suffer performance degradation due to interference detection failures. For example, when interference detection fails, or when a mobile station or user equipment (UE) acting as a radio transmitter detects an interference source in a channel or subband, the UE's transmission is postponed to a later time when the channel or subband is available again. Therefore, for example, frequency diversity techniques can be applied, such as by allowing the radio transmitter to perform interference detection on multiple subbands simultaneously and then transmit on one of the subbands for which the interference detection succeeds.

[0089] As an example of the above signaling process, Figure 1 An example 2-step RA procedure 100 between a UE 110 and an access network (AN) 120, for example in a new radio (5G) communication system, is illustrated.

[0090] In the example 2-step RA procedure 100, UE 110 transmits a first signaling message 130 to AN 120, e.g., to a base station in AN 120. The first signaling message 130 may include a preamble on a physical random access channel (PRACH) in a first portion 140 and a data portion on a physical shared channel (PUSCH) in a second portion 150. In response to the first signaling message 130, AN 120 (e.g., a base station in AN 120) may transmit a second signaling message 160 to UE 110 in response.

[0091] When frequency diversity techniques are applied to the example 2-step RA process 100, e.g., Figure 2 As shown, considering two subbands 210 and 220, UE 110 may perform interference detection on both subbands 210 and 220 before transmitting first portion 140. If the interference detection passes on subband 210 but temporarily fails on subband 220, UE 110 may select subband 210 to transmit both first portion 140 and second portion 150. However, if, for example, the interference detection fails on subband 210 before transmitting second portion 150, the transmission of second portion 150 will be delayed.

[0092] Different UEs may have different multi-subband capabilities. For example, some UEs receive and transmit on one subband at a time, while more advanced UE capabilities may operate on multiple subbands simultaneously. Figure 2 In the illustrated example, subsequent signaling messages between UE 110 and AN 120 are also used in subband 210. For example, if the interference detection failure on subband 220 is temporary, AN 120 will also transmit a second signaling message 160 in subband 210, and UE 110 will monitor for the second signaling message 160 on subband 210, even though UE 110 actually supports simultaneous operation on both subbands 210 and 220. However, if, for example, the interference detection fails on subband 210 before the second signaling message 160 is transmitted (e.g., if the channel continues to be busy beyond the second signaling message 160 window), the transmission of the second signaling message 160 will be delayed or even fail.

[0093] In order to take more advantage of frequency diversity technology, in an exemplary embodiment, on the UE 110 side, for example, Figure 3 As shown, another interference detection on sub-band 220 may be performed, for example, before transmitting the second portion 150 .

[0094] If detected by another interference on subband 220 , UE 110 may select subband 220 to transmit second portion 150 and may then monitor subbands 210 and 220 for second signaling message 160 .

[0095] On the other hand, AN 120 may determine that UE 110 is capable of supporting simultaneous operation on multiple subbands, for example, based on the different subbands of first portion 140 and second portion 150, or by some other flag indicating such capability of UE 110 that may be included in first portion 140 or second portion 150. Therefore, AN 120 may prepare second signaling message 160 on subbands 210 and 220, and then select any one or more subbands of subbands 210 and 220 to transmit second signaling message 160, for example, on Figure 3 In the example of , the second signaling message 160 is transmitted in the subband 210 .

[0096] It should be understood that the multiple sub-bands herein are not limited to Figure 3 For example, Figure 4 As shown, the plurality of subbands 400 may include one or more other subbands (such as subband 410), and subbands 210 and 220 may be two boundary subbands of the plurality of subbands. Then, AN 120 may determine the plurality of subbands based on the two boundary subbands and may prepare the second signaling message 160 on the plurality of subbands 400. Then, AN 120 may select any one or more subbands in the plurality of subbands 400 to transmit the second signaling message 160, for example, Figure 4 In the example, the second signaling message 160 is transmitted in the subband 410. In another example, the subbands 210 and 220 may be any two boundary subbands of the plurality of subbands 400. Accordingly, the UE 110 may monitor the second signaling message 160 on the plurality of subbands, the plurality of subbands including at least the subbands 210 and 220.

[0097] In the above-described example embodiment, first portion 140 and second portion 150 are transmitted in different subbands 210 and 220, and an indication of the correspondence between first portion 140 and second portion 150, such as an indication of subband 210 of first portion 140 or an indication of first portion 140 transmitted in subband 210, may be included in second portion 150. Based on such an indication, AN 120 may determine which subband UE 110 uses to transmit the corresponding first portion 140, and may then link the two portions together.

[0098] For example, Figure 5 and Figure 6An example scenario 500 is illustrated in which UE 510 and UE 520 communicate with AN 530 in a process similar to the example 2-step RA process 100 described above. UE 510 transmits a first portion 540 (e.g., including a preamble) of a signaling message 560 in subband 610 and a second portion 550 (e.g., including a data portion) of the signaling message 560 in subband 620 to AN 530. UE 520 transmits a first portion 570 (e.g., including a preamble) of a signaling message 590 in subband 620 and a second portion 580 (e.g., including a data portion) of the signaling message 590 in subband 610 to AN 530.

[0099] like Figure 6 As shown, the second portion 550 of the UE 510 may include an indication 630 of a correspondence between the first portion 540 and the second portion 550 in the subband 610. For example, the indication 630 may indicate the subband 610 corresponding to the first portion 140. Similarly, the second portion 580 of the UE 520 may include an indication 640 of a correspondence between the first portion 570 and the second portion 580 in the subband 620. For example, the indication 640 may indicate the subband 620 corresponding to the first portion 570.

[0100] Then, when AN 530 receives second portion 580 in subband 610, AN 530 may detect indication 640 in second portion 580 and may determine, based on indication 640, that the first portion corresponding to second portion 580 is first portion 570 in subband 620, rather than first portion 540 in subband 610. Therefore, for UE 520, AN 530 may link second portion 580 in subband 610 with first portion 570 in subband 620, rather than first portion 540 in subband 610. AN 530 may then extract, for example, timing alignment information from first portion 570 in subband 620, and further decode second portion 580 in subband 610 based on the extracted timing alignment information.

[0101] Similarly, when AN 530 receives second portion 550 in subband 620, AN 530 may detect indication 630 in second portion 550 and may determine, based on indication 630, that the first portion corresponding to second portion 550 is first portion 540 in subband 610 rather than first portion 570 in subband 620. Therefore, for UE 510, AN 530 may link second portion 550 in subband 620 with first portion 540 in subband 610 rather than first portion 570 in subband 620. AN 530 may then extract, for example, timing alignment information from first portion 540 in subband 610 and further decode second portion 550 in subband 620 based on the extracted timing alignment information.

[0102] The indication in the second part (e.g., indications 630 and 640) can be any suitable flag or signal for indicating the correspondence between the first part and the second part of the signaling message, such as indicating the first subband corresponding to the first part. In addition, such indication can take any suitable form and can include any suitable content.

[0103] For example, a predetermined number of preambles may be applied to a cell, and the preamble used by the UE may be specified by the AN or randomly selected from a predetermined group. In addition, the UE may transmit its own reference signal to the AN, and the AN may know the reference signal port of the UE. In addition, the reference signal used by the UE may also be dedicated to the preamble used by the UE. Therefore, the correspondence between the preamble in the first part and the demodulation reference signal (DMRS) in the second part may be used as an indication in the second part. For example, the indication in the second part may indicate the port used to transmit the second part, such as the demodulation reference signal (DMRS) port.

[0104] A portion of an example mapping 700 between possible example preambles and possible example DMRS ports in the first section is illustrated in FIG. Figure 7 , where DMRS ports are divided into two groups: "cross-band" and "non-cross-band." "Cross-band" means that the preamble in the first part is located in a different subband than the subband in the second part, while "non-cross-band" means that the preamble in the first part is located in the same subband as the subband in the second part. Example mapping 700 can be used, for example, in the case of two subbands.

[0105] For example, reference Figure 5 and Figure 6In the example, assuming that for UE 510, the first part 540 in subband 610 includes preamble #3 in the example mapping 700, and for UE 520, the first part 570 in subband 620 includes preamble #4 in the example mapping 700, then UE 510 can transmit part 550 in subband 620 according to the example mapping 700, for example, via DMRS port #1, and UE 520 can transmit part 580 in subband 610 according to the example mapping 700, for example, via DMRS port #1.

[0106] Then, when receiving the second portion 580 in subband 610, AN 530 can determine, for example, based on the DMRS in the second portion 580, that the second portion 580 in subband 610 was transmitted by the UE via DMRS port #1. DMRS port #1 is a "cross-band" port, based on which AN 530 can determine that the corresponding first portion is in a subband different from subband 610, and in the case of two subbands 610 and 620, AN 530 can determine that the first portion corresponding to the second portion 580 in subband 610 is in subband 620. Since the reference signal used by the UE can be specific to the preamble used by the UE, the first portion 570 in subband 620 including preamble #4 can then be determined by AN 530. AN 530 may then link the first portion 570 in subband 620 with the second portion 580 in subband 610 and may further extract information of preamble #4 from the first portion 570 in subband 620 for decoding the data portion in the second portion 580 in subband 610 .

[0107] Similarly, when receiving the second portion 550 in subband 620, AN 530 can determine, for example, based on the DMRS in the second portion 550, that the second portion 550 in subband 620 was transmitted by the UE via DMRS port #1. DMRS port #1 is a "cross-band" port, based on which AN 530 can determine that the corresponding first portion is in a subband different from subband 620, and in the case of two subbands 610 and 620, AN 530 can determine that the first portion corresponding to the second portion 580 in subband 620 is in subband 610. As described above, the reference signal used by the UE can be specific to the preamble used by the UE, and the first portion 540 in subband 610, including preamble #3, can then be determined by AN 530. AN 530 may link the first portion 540 in subband 610 with the second portion 550 in subband 620 and may further extract information of preamble #3 from the first portion 540 in subband 610 for decoding the data portion in the second portion 550 in subband 620 .

[0108] As another example, if (e.g., due to not supporting operation on multiple subbands or due to failure of interference detection on other subbands, etc.) the UE transmits a first part of a signaling message (which includes, for example, preamble #10) and a second part of the signaling message in the same subband (e.g., subband 610 described above), then the UE may transmit its second part via, for example, DMRS port #7 according to the above-described example mapping 700.

[0109] Then, when receiving the second portion in subband 610, AN 530 can determine, for example, based on the DMRS in the second portion, that the second portion in subband 610 was transmitted by the UE via DMRS port #7. DMRS port #7 is a "non-cross-band" port, and based on this, AN 530 can determine that the corresponding first portion is also in subband 610. As described above, the reference signal used by the UE can be specific to the preamble used by the UE, and the corresponding first portion including preamble #10 in subband 610 can be determined by AN 530. AN 530 can then extract the information of preamble #10 from the concatenated first portion in subband 610 for decoding the data portion in the second portion in subband 610.

[0110] Example mapping 700 can be applied to the case of two subbands. For more than two subbands, DMRS ports can be divided into more than two groups. For example, for 3 subbands, Figure 8 A portion of an example mapping 800 between preambles, DMRS ports, and subbands is illustrated. For example, if the UE transmits its second part via DMRS port #4 in subband #1, the AN can determine that the corresponding first part is in subband #3 (i.e., "cross-band") and can include preambles #1, #2, #3, or #4. If the UE transmits its second part via DMRS port #6 in subband #2, the AN can determine that the corresponding first part is in subband #2 (i.e., "non-cross-band") and can include preambles #5, #6, #7, or #8.

[0111] As described above, a UE supporting operation on multiple subbands may operate in either "cross-band mode" or "non-cross-band mode" depending on the number of currently available subbands.

[0112] like Figure 9 As shown, in cross-band mode 910, the UE may transmit two parts of a signaling message to the AN in different subbands and may then monitor for a response from the AN on multiple subbands, including the subband used to transmit the two parts. Accordingly, on the AN side, the AN may determine that the UE supports operation on multiple subbands based on the two different subbands of the two received parts, and may then prepare a response on the multiple subbands and transmit the response on any one or more of the multiple subbands.

[0113] like Figure 9 As shown, in the cross-band mode 910 , when interference detection on one subband passes but interference detection on other subbands fails, the UE may transition to the non-cross-band mode 920 .

[0114] For example, in conjunction with the above-mentioned example mapping 700, for example, the UE may switch the DMRS port used to transmit the second part, for example, from DMRS port #1, #2, #3 or #4 to DMRS port #5, #6, #7 or #8. For example, the DMRS port used may also depend on the preamble used. For example, in the non-cross-band mode 920, the UE may transmit the two parts of the signaling message to the AN in the same subband via the switched DMRS port of the "non-cross-band" type, and may then monitor the response from the AN on the subband used to transmit the two parts. In another example, the UE may also monitor the response from the AN on multiple subbands.

[0115] Accordingly, on the AN side, the AN can determine that the UE does not support operation on multiple subbands based on the fact that the two parts are in the same subband, for example, according to the indication in the second part or the DMRS port indicated by the indication in the second part, and then prepare and transmit a response on the subbands of the first part and the second part.

[0116] like Figure 9 As shown, in the non-cross-band mode 920, when at least 2 subbands become available based on another interference detection, the UE can transition back to the cross-band mode 910 to monitor the response from the AN on multiple subbands, including two different subbands for transmitting the two parts.

[0117] In another example embodiment, the indication in the second part may also indicate that the UE actually supports operation on multiple subbands, even though the first part and the second part are transmitted in the same subband. For example, the DMRS ports can be divided into 3 groups, including the aforementioned "cross-band", the aforementioned "no cross-band", and an additional type of "temporarily no cross-band" for the case where the UE actually supports operation on multiple subbands even though the first part and the second part are transmitted in the same subband. In another example, additional information indicating that the UE actually supports operation may be included in the data portion of the second part. In another example, such additional information may also be included in the first part. For example, such additional information may include the range of multiple subbands supported by the UE.

[0118] For example, when a UE that actually supports operation on multiple subbands experiences interference detection failure on other subbands for a period of time, the UE may configure such an indication in the second part or the aforementioned additional information indicating that the UE actually supports operation in the first part or the second part, and may transmit the first part and the second part in a subband that passed the interference detection. For example, if the aforementioned additional information indicating that the UE actually supports operation is also configured, the second part may be transmitted via a "non-crossing band" DMRS port via the second part; or the second part may be transmitted via a "temporarily non-crossing band."

[0119] Accordingly, on the AN side, the AN can determine that the subband of the first part is the same as the subband of the second part, and thus can correctly link the two parts. In addition, the AN can determine that the UE supports operations on multiple subbands based on the above-mentioned additional information indicating that the UE actually supports operations or based on the "temporarily no cross-band" port indicated by the indication, and can further prepare a response on multiple subbands, for example, determined based on the additional information. Regarding the response from the AN to the UE, refer again to Figure 1 , the second signaling message 160 as a response from the AN 120 to the UE 110 may depend on the processing result of the first signaling message 130 on that side.

[0120] For example, if the AN 120 can successfully decode the data portion of the second portion 150 (e.g., a PUSCH transmission), a second signaling message 160 in response may include information about, for example, a random access response (RAR) and connection resolution, wherein the second signaling message 160 may be a combination of Msg2 and Msg4 in a 4-step RA procedure. Such a second signaling message 160 may be prepared by the AN 120, for example, by scrambling downlink control information (DCI) using an RA radio network temporary identity (RA-RNTI) corresponding to the RA resource of the preamble in the first portion 140.

[0121] For example, if AN 120 fails to decode the data portion of the second part 150 but can detect an indication (e.g., indication 630 or 640 in the above example), then based on the detected indication, AN 120 can still determine whether UE 110 supports receiving responses on multiple subbands, and if the first part 140 and the second part 150 in the first signaling message are in different subbands, or otherwise on the subband of the first part 140, then the RAR can be further prepared by scrambling the downlink control information (DCI) using the RA radio network temporary identity (RA-RNTI) corresponding to the RA resource of the preamble code in the first part 140.

[0122] For example, if AN 120 fails to detect an indication (e.g., indication 630 or 640 in the above example), for example, such an indication is not included in the second part 150, or the second part 150 is not included in the signaling message 130, then AN 120 can prepare the RAR on the subband of the first part 140, for example, by using downlink control information (DCI) scrambled with the RA radio network temporary identity (RA-RNTI) corresponding to the RA resource of the preamble code in the first part 140.

[0123] Then, as Figure 10 In the illustrated example process 1000, in response to receiving the second signaling message 160, the UE 110 may prepare a second portion 150 on the subband or on multiple subbands in which the second signaling message 160 was received, and then retransmit the prepared second portion 150 in one or more selected subbands to the AN 120. Then, in response to receiving the separate second portion 150, the AN 120 may prepare and transmit another response 1010, such as connection resolution information, to the UE 110.

[0124] Several examples have been described in the context of the RA process. It should be understood that the present application is not limited to the above examples. The solutions herein can also be applied to any other process, for example, based on a sequential protocol. In addition, interference detection before transmission can be optional. That is, transmitting different parts of the signaling message in different subbands can be independent of the interference detection result. In addition, in another example embodiment, the subbands considered may not be limited to the above-mentioned 2 subbands or 3 subbands, but can be any number of subbands. In addition, in another example embodiment, the signaling message for transmission may include 3, 4 or more parts, and different parts or sets of different parts may be transmitted in different subbands. In addition, the corresponding indication between the corresponding parts of the signaling message for transmission or information about the subbands of the corresponding parts of the signaling message for transmission may be included in any one or more suitable parts of the signaling message for transmission and may be in any suitable form.

[0125] Figure 11 An example method 1100 according to an example embodiment is shown. For example, the example method 1100 may be applied to a UE such as Figure 1 UE 110, etc.

[0126] like Figure 11 As shown, the example method 1100 may include performing a first sub-band (e.g., Figure 3 210 in the subband 210) in the transmission signaling message (eg, Figure 1 The first part of the first signaling message 130 in Figure 1140 in the first part 1110), and in the second sub-band (eg, Figure 3 The second part of the signaling message (eg, Figure 1 Step 1120 of the second portion 150 of the embodiment, wherein the second portion may include an indication of a corresponding relationship between the first portion and the second portion (e.g., Figure 6 630 or 640 in the indication), for example, the indication may indicate a first portion transmitted in a first subband.

[0127] As described above, by transmitting each part of the signaling message for transmission in different subbands, further advantages of frequency diversity technology can be utilized, for example, the robustness of anti-interference detection can be improved. Furthermore, by including an indication of the correspondence between the first part and the second part in the second part, the AN can determine the correct first part transmitted by the UE and can then decode the data portion in the second part based on the information in the first part.

[0128] In an example embodiment, the second subband may be different from the first subband, for example, when interference detection on the second subband passes. In another example embodiment, interference detection may be optional, and the first subband and the second subband may be any different subbands selected by the UE according to any suitable rules or negotiation between the UE and the AN.

[0129] In another example embodiment, Figure 12 As shown, the example method 1100 may further include step 1210 of monitoring a response to the signaling message from the AN on a plurality of subbands including at least a first subband and a second subband.

[0130] As described above, in an example embodiment, example method 1100 may be applied to an RA procedure. For example, the first portion may include a preamble for the RA procedure, and the second portion may further include a data portion of the RA procedure. In addition, the indication may include a mapping between the preamble in the first portion in the first subband and the DMRS port used to transmit the second portion (e.g., a mapping entry in example mapping 700 or 800, or example mapping 700 or 800).

[0131] Furthermore, as described above, a UE supporting operation on multiple subbands may operate in a cross-band mode or a non-cross-band mode. Accordingly, in an example embodiment, in the event that interference detection fails on other subbands or subbands other than the first subband, the second portion may be transmitted in the first subband instead.

[0132] Figure 13 An example apparatus 1300 is shown, which may be at least a portion of a UE 110, for example, according to an example embodiment.

[0133] like Figure 13 As shown, the example apparatus 1300 may include at least one processor 1310 and at least one memory 1320 that may include computer process code 1330. The at least one memory 1320 and the computer process code 1330 may be configured to, together with the at least one processor 1310, cause the apparatus 1300 to perform at least the example method 1100 described above.

[0134] In various example embodiments, the at least one processor 1310 in the example apparatus 1300 may include, but is not limited to, at least one hardware processor including at least one microprocessor such as a central processing unit (CPU), a portion of at least one hardware processor, and any other suitable dedicated processor such as those developed based on, for example, a field programmable gate array (FPGA) and an application specific integrated circuit (ASIC). In addition, the at least one processor 1310 may also include Figure 13 At least one other circuit or element not shown.

[0135] In various example embodiments, at least one memory 1320 in the example apparatus 1300 may include various forms of at least one storage medium, such as volatile memory and / or non-volatile memory. Volatile memory may include, but is not limited to, for example, random access memory (RAM), cache, etc. Non-volatile memory may include, but is not limited to, for example, read-only memory (ROM), hard disk, flash memory, etc. Furthermore, at least memory 1320 may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or apparatuses, or any combination thereof.

[0136] Furthermore, in various example embodiments, the exemplary apparatus 1300 may further include at least one other circuit, element, and interface, such as at least one I / O interface, at least one antenna element, and the like.

[0137] In various example embodiments, the circuits, components, elements, and interfaces in the exemplary apparatus 1300 including at least one processor 1310 and at least one memory 1320 may be coupled together in any suitable manner (e.g., electrically, magnetically, optically, electromagnetically, etc.) via any suitable connections (including, but not limited to, buses, switch fabrics (crossbars), wiring, and / or wireless links).

[0138] The device structure on the UE 110 side is not limited to the above-described example device 1300 . Figure 14 Another example device 1400 is illustrated, which may be, for example, at least a portion of UE 110 , according to an example embodiment.

[0139] like Figure 14As shown, the example device 1400 may include means 1410 for performing step 1110 of the example method 1100 and means 1420 for performing step 1120 of the example method 1100 .

[0140] In one or more other example embodiments, the example apparatus 1400 may further include one or more other means for performing other additional or alternative steps in the example method 1100. For example, Figure 14 As shown, the example device 1400 may further include means 1430 for performing step 1210 of the example method 1100. In addition, for example, at least one I / O interface, at least one antenna element, etc. may also be included in the example device 1400.

[0141] In another example embodiment, a device that can be applied on a UE may include one or more circuits. For example, such a device may include a circuit configured to perform step 1110 of the example method 1100, a circuit configured to perform step 1120 of the example method 1100, and a circuit configured to perform step 1210 of the example method 1100. In one or more other example embodiments, such a device may further include one or more other circuits configured to perform other additional or alternative steps in the example method 1100. In addition, for example, at least one I / O interface, at least one antenna element, etc. may also be included in such a device.

[0142] Throughout this application, the term "circuitry" may refer to one or more or all of the following: (a) a hardware-only implementation of the circuit (such as an implementation in analog and / or digital circuitry only); (b) a combination of hardware circuitry and software, for example, as applicable; (i) a combination of analog and / or digital hardware circuitry and software / firmware; and

[0143] (ii) a hardware processor and any portion of software (including a digital signal processor), software, and memory that work together to enable a device such as a mobile phone or server to perform various functions); and (c) a hardware circuit and / or processor, such as a microprocessor or portion of a microprocessor, that requires software (e.g., firmware) to operate, but that software may not be present when not required to operate. This definition of circuitry applies to all uses of the term in this application, including in any claims. As a further example, as used in this application, the term "circuitry" also covers an implementation of merely a hardware circuit or processor (or multiple processors) or a portion of a hardware circuit or processor and its (or their) accompanying software and / or firmware. For example, and where applicable to a claim element, the term circuitry also covers a baseband integrated circuit or processor integrated circuit for a mobile device, or a similar integrated circuit in a server, cellular network device, or other computing or networking device.

[0144] Several exemplary embodiments on the UE 110 side have been described above by way of non-limiting examples. More details on the AN 120 side will now be described by way of non-limiting examples.

[0145] Figure 15 An example method 1500 is illustrated, such as may be performed on the AN 120 side, according to an example embodiment.

[0146] like Figure 15 As shown, corresponding to step 1110 of example method 1100, example method 1500 may include performing a first sub-band (eg, Figure 3 210 in the subband 210) to receive a signaling message (eg, Figure 1 The first part of the first signaling message 130 in Figure 1 Corresponding to step 1120 of example method 1100, example method 1500 may include, in a second sub-band (e.g., Figure 3 220 in the subband 220) in the receiving portion of the signaling message (eg, Figure 1 Step 1520 of the first part 150), wherein the second part may include an indication of a corresponding relationship between the first part and the second part (e.g., Figure 6 Indication 640 or 650 in the example, for example, the indication may indicate a first portion received in a first subband. In addition, the example method 1500 may also include step 1530 of determining, based on the indication, that the first portion in the first subband and the second portion in the second subband are from the same UE.

[0147] As described above, based on the indication included in the second part, the AN can know whether the UE supports operation on multiple subbands (for example, monitoring responses on multiple subbands), and can determine the multiple subbands based on the first subband of the first part and the second subband of the second part. In addition, based on the indication included in the second part, the AN can know which subband is the first subband of the first part corresponding to the second part of the second subband. Therefore, the AN can link the correct first part in the first subband with the second part in the second subband, and can then extract, for example, correct timing alignment information from the first part, which in turn can help the AN decode, for example, the data portion in the second part.

[0148] In various example embodiments, the step of determining 1530 may be explicit or implicit.

[0149] In an example embodiment, Figure 16As shown, corresponding to step 1210 of example 1100, example 1500 may further include step 1610, when the second subband of the second part is different from the first subband of the first part, preparing a response to the user equipment signaling message on multiple subbands including the first subband and the second subband.

[0150] Furthermore, in an example embodiment, corresponding to step 1210 of example 1100, example 1500 may further include the step of transmitting a response in at least one subband of the plurality of subbands when interference detection on at least one subband is passed.

[0151] In an example embodiment, for example, when the second subband is the same as the first subband, or in case of a detection failure of the indication in the second portion in the second subband, a response to the signaling message of the UE may be prepared on the first subband.

[0152] As described above, in an example embodiment, example method 1100 may be applied to an RA procedure. For example, the first portion may include a preamble for the RA procedure, and the second portion may further include a data portion of the RA procedure. In addition, the indication may include a mapping between the preamble in the first portion of the first subband and the DMRS port used to transmit the second portion (e.g., a mapping entry in example mapping 700 or 800, or example mapping 700 or 800). Thus, based on the mapping, it can be determined that the first portion and the second portion are from the same user equipment.

[0153] Figure 17 An example apparatus 1700 is illustrated, which may be, for example, at least a portion of the AN 120 , such as at least a portion of a base station of the AN 120 , according to an example embodiment.

[0154] like Figure 17 As shown, the example apparatus 1700 may include at least one processor 1710 and at least one memory 1720 that may include computer process code 1730. The at least one memory 1720 and the computer process code 1730 may be configured to, together with the at least one processor 1710, cause the apparatus 1700 to perform at least the example method 1500 described above.

[0155] In various example embodiments, the at least one processor 1710 in the example apparatus 1700 may include, but is not limited to, at least one hardware processor including at least one microprocessor such as a CPU, a portion of at least one hardware processor, and any other suitable dedicated processor such as those developed based on, for example, FPGAs and ASICs. In addition, the at least one processor 1710 may also include Figure 17 At least one other circuit or element not shown.

[0156] In various example embodiments, at least one memory 1720 in example apparatus 1700 may include various forms of at least one storage medium, such as volatile memory and / or non-volatile memory. Volatile memory may include, but is not limited to, RAM, cache, etc. Non-volatile memory may include, but is not limited to, ROM, hard disk, flash memory, etc. Furthermore, at least memory 1720 may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or apparatuses, or any combination thereof.

[0157] Furthermore, in various example embodiments, the exemplary apparatus 1700 may further include at least one other circuit, element, and interface, such as at least one I / O interface, at least one antenna element, and the like.

[0158] In various example embodiments, the circuits, components, elements, and interfaces in the exemplary apparatus 1700 including at least one processor 1710 and at least one memory 1720 may be coupled together in any suitable manner (e.g., electrically, magnetically, optically, electromagnetically, etc.) via any suitable connection (including, but not limited to, buses, switch fabrics, wiring, and / or wireless links).

[0159] The device structure on the AN 120 side is not limited to the above-described example device 1700 . Figure 18 Another example device 1800 is illustrated, which may be, for example, at least a portion of the AN 120 , such as at least a portion of a base station of the AN 120 , according to an example embodiment.

[0160] like Figure 18 As shown, example device 1800 may include means 1810 for performing step 1510 of example method 1500 , means 1820 for performing step 1520 of example method 1500 , and means 1830 for performing step 1530 of example method 1500 .

[0161] In one or more other example embodiments, the example device 1800 may further include one or more other means for performing other additional or alternative steps in the example method 1400. For example, the example device 1800 may further include one or more other means for performing step 1610. In addition, for example, at least one I / O interface, at least one antenna element, etc. may also be included in the example device 1800.

[0162] In another example embodiment, an apparatus, for example, applicable to an AN, may include one or more circuits. For example, such an apparatus may include a circuit configured to perform step 1510 of example method 1500, a circuit configured to perform step 1520 of example method 1500, and a circuit configured to perform step 1530 of example method 1500. In one or more other example embodiments, such an apparatus may further include one or more other circuits configured to perform other additional or alternative steps in example method 1500. Furthermore, for example, at least one I / O interface, at least one antenna element, etc. may also be included in such an apparatus.

[0163] Another example embodiment may relate to computer program codes or instructions, which may cause an apparatus to perform at least the corresponding method described above.

[0164] Another example embodiment may relate to a computer-readable medium having such computer program code or instructions stored thereon. In some example embodiments, such a computer-readable medium may include at least one storage medium in various forms such as volatile memory and / or non-volatile memory. Volatile memory may include, but is not limited to, RAM, cache, etc. Non-volatile memory may include, but is not limited to, ROM, hard disk, flash memory, etc.

[0165] Several example embodiments have been described above in the context of an RA procedure between a UE and an AN. However, it should be understood that the present application is not limited to the example RA procedure. Furthermore, the signaling procedure implemented by the solutions of the present application is not limited to the signaling procedure between a UE and an AN. In various embodiments, the above-described example methods 1100 and 1500 can be applied to any transmitter and any receiver, respectively, in any other signaling procedure via a sequence protocol. For example, the above-described example apparatus 1300 or 1400, etc., which can be configured to implement example method 1100, can also be at least a portion of the AN (e.g., at least a portion of a base station of the AN) when the AN acts as a transmitter. For example, the above-described example apparatus 1700 or 1800, etc., which can be configured to implement example method 1500, can also be at least a portion of a UE (such as a mobile phone, tablet, vehicle, etc.) when the UE acts as a receiver. For example, for any two mobile devices (e.g., two vehicles) wishing to communicate with each other in a vehicle-to-everything (V2X) scenario, one can implement example method 1100, while the other can implement example method 1500.

[0166] Unless the context clearly requires otherwise, throughout the specification and claims, the words "comprise", "comprising", etc. should be interpreted in an inclusive sense, rather than in an exclusive or exhaustive sense; that is, in the sense of "including but not limited to". As generally used herein, the term "coupled" refers to two or more elements that can be directly connected or connected through one or more intermediate elements. Similarly, as generally used herein, the term "connected" refers to two or more elements that can be directly connected or connected through one or more intermediate elements. In addition, when used in this application, the words "herein", "above", "below" and words of similar meaning should refer to this application as a whole, rather than to any particular part of this application. Where the context permits, words used in the singular or plural in the description may also include the plural or singular, respectively. The word "or" refers to a list of two or more items, and the word covers all of the following interpretations of the word: all items in the list, any item in the list, and any combination of items in the list.

[0167] Furthermore, conditional language used herein, such as "may," "could," "might," "can," "for example," "example," "such as," and the like, unless otherwise specifically stated or understood otherwise in the context of use, is generally intended to convey that some embodiments include and other embodiments do not include certain features, elements, and / or states. Thus, such conditional language is generally not intended to indicate that features, elements, and / or states are in any way required for one or more embodiments, or that one or more embodiments necessarily include logic for determining that such features, elements, and / or states are included or will be performed in any particular example embodiment, with or without author input or prompting.

[0168] Although some example embodiments have been described, these embodiments have been given by way of example and are not intended to limit the scope of the present disclosure. In fact, the devices, methods, and systems described herein can be embodied in a variety of other forms. In addition, without departing from the spirit of the present disclosure, various omissions, replacements, and changes can be made to the form of the methods and systems described herein. For example, although the boxes are presented in a given arrangement, alternative embodiments can perform similar functions with different components and / or circuit topologies, and some boxes can be deleted, moved, added, subdivided, combined, and / or modified. Each of these boxes can be implemented in a variety of different ways. The order of these boxes can also be changed. Any appropriate combination of the elements and actions of the various embodiments described above can be combined to provide other embodiments. The attached claims and their equivalents are intended to cover these forms or modifications that will fall within the scope and spirit of the application.

Claims

1. A communication method, comprising: performing a first interference detection on a first sub-band and a second sub-band, wherein the first sub-band is different from the second sub-band; selecting the first subband for sending a first portion of a signaling message based on the first interference detection, and transmitting the first portion of the signaling message in the first subband in response to the selection; performing a second interference detection on the second subband; transmitting a second part of the signaling message in the second subband based on a condition that the second interference detection on the second subband passes, the second part including an indication of the first part transmitted in the first subband, The first part includes a preamble part for a random access procedure, and the second part further includes a data part of the random access procedure, wherein the indication comprises a mapping between a preamble portion in the first portion of the first subband and a demodulation reference signal port used to transmit the second portion; and A response to the signaling message from an access network is monitored over a plurality of subbands including at least the first subband and the second subband.

2. The method according to claim 1, wherein In case interference detection fails in a subband or subbands other than the first subband, the second part is transmitted in the first subband instead.

3. A communication device comprising: at least one processor; as well as at least one memory comprising computer program code, the at least one memory and the computer program code being configured, with the at least one processor, to cause the apparatus to perform: performing a first interference detection on a first sub-band and a second sub-band, wherein the first sub-band is different from the second sub-band; selecting the first subband for sending a first portion of a signaling message based on the first interference detection, and transmitting the first portion of the signaling message in the first subband in response to the selection; performing a second interference detection on the second subband; transmitting a second part of the signaling message in the second subband based on a condition that the second interference detection on the second subband passes, the second part including an indication of the first part transmitted in the first subband, The first part includes a preamble part for a random access procedure, and the second part further includes a data part of the random access procedure, wherein the indication comprises a mapping between a preamble portion in the first portion of the first subband and a demodulation reference signal port used to transmit the second portion; and A response to the signaling message from an access network is monitored over a plurality of subbands including at least the first subband and the second subband.

4. The device according to claim 3, wherein In case interference detection fails in a subband or subbands other than the first subband, the second part is transmitted in the first subband instead.

5. A computer-readable medium comprising: The instructions stored thereon are used to cause the device to execute the method according to any one of claims 1 to 2.

6. A communication device comprising: means for performing a first interference detection on a first sub-band and a second sub-band, wherein the first sub-band is different from the second sub-band; means for selecting the first subband for sending a first portion of a signaling message based on the first interference detection, and transmitting the first portion of the signaling message in the first subband in response to the selection; means for performing a second interference detection on the second subband; means for transmitting a second portion of the signaling message in the second subband based on a pass of the second interference detection on the second subband, the second portion comprising an indication of the first portion transmitted in the first subband, The first part includes a preamble part for a random access procedure, and the second part further includes a data part of the random access procedure, wherein the indication comprises a mapping between a preamble portion in the first portion of the first subband and a demodulation reference signal port used to transmit the second portion; and means for monitoring a response to the signaling message from an access network on a plurality of subbands including at least the first subband and the second subband.

7. The apparatus of claim 6, wherein: In case interference detection fails in a subband or subbands other than the first subband, the second part is transmitted in the first subband instead.

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