Buffer status information transmission method and apparatus for secondary cell group

Abstract

Embodiments of the present application provide a method and device for transmitting buffer data state information of a secondary cell group. The method comprises: determining that a secondary cell group (SCG) is in a deactivated state; and sending target information to a network device through a master cell group (MCG), wherein the target information is used to indicate buffer data state information of the SCG, and the target information comprises at least one of the following: a target buffer status report (BSR) and target radio resource control (RRC) signaling. The method and device for transmitting buffer data state information of a secondary cell group provided by the embodiments of the present application can realize the function of indicating buffer data state information of the SCG side by a terminal.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of communication technology, in particular to a buffer data state information transmission method and device of a secondary cell group. BACKGROUND

[0002] NRR17 will introduce a SCG (Secondary Cell Group, secondary cell group) deactivated state, wherein the SCG deactivated state is equivalent to the SCG dormant state or SCG suspend state or PSCell (Primary SCG Cell, primary cell in the secondary cell group) suspend state or dormant state or deactivated state, etc.

[0003] At present, when the SCG is in the deactivated state, for the scenario of uplink data of the terminal arriving at the RLC (Radio Link Control, wireless link control) bearer of the SCG side, the terminal needs to trigger the activation of the SCG. Then how to realize the terminal triggering the activation of the SCG. SUMMARY

[0004] Embodiments of the present application provide a buffer data state information transmission method and device of a secondary cell group, to solve the above technical problems existing in the prior art.

[0005] In a first aspect, the embodiments of the present application provide a buffer data state information transmission method of a secondary cell group, comprising:

[0006] determining that a secondary cell group SCG is in a deactivated state;

[0007] sending target information to a network device through a master cell group MCG; the target information is used to indicate buffer data state information of the SCG;

[0008] The target information includes at least one of the following:

[0009] a target buffer status report BSR;

[0010] target radio resource control RRC signaling.

[0011] In one embodiment, when the target information includes the target BSR, the logical channel ID LCID corresponding to the target BSR includes:

[0012] a predetermined Codepoint and / or Index parameter value corresponding to a target LCID value, the target LCID value corresponding to the format of the BSR of the SCG;

[0013] The format of the BSR of the SCG includes one or more of a short format, a long format, a short truncated format, and a long truncated format.

[0014] In one embodiment, in a case where the target information includes the target BSR, an LCID corresponding to the target BSR includes:

[0015] A predetermined Codepoint and / or Index parameter value corresponds to a target LCID value, which corresponds to a BSR of a predetermined format of the SCG;

[0016] The BSR of the predetermined format of the SCG corresponds to a BSR medium access control (MAC) control element (CE) including at least one of:

[0017] An SCG index;

[0018] A logical channel group (LCG) bitmap;

[0019] An LCG ID;

[0020] An LCID;

[0021] An LCID bitmap;

[0022] An LCID index bitmap;

[0023] An LCID index;

[0024] An LCID bitmap length indication;

[0025] An LCID index length indication;

[0026] Buffer data information;

[0027] Indication information of whether there is a non-reported BSR.

[0028] In one embodiment, in a case where the target information includes the target BSR, a reserved bit of a MAC subheader corresponding to the target BSR includes any one of:

[0029] In a case where the MAC subheader includes one reserved bit, the reserved bit indicates whether the target BSR is a BSR of the SCG;

[0030] In a case where the MAC subheader includes two reserved bits, any one of the two reserved bits indicates whether the target BSR is a BSR of the SCG;

[0031] In a case where the MAC subheader includes two reserved bits, one of the two reserved bits indicates whether the target BSR is a BSR of the SCG, and the other indicates whether the target BSR is a BSR of the MCG.

[0032] In a case where the MAC subheader includes two reserved bits, the two reserved bits indicate an SCG index, which indicates which SCG the target BSR is a BSR of.

[0033] The format of the target BSR is any one of a short format, a long format, a short truncated format, a long truncated format, and a predetermined format.

[0034] In a case where one of the two reserved bits indicates whether the target BSR is a BSR of the SCG, and the other indicates whether the target BSR is a BSR of the MCG, the MAC subheader corresponding to the target BSR includes any one of the following:

[0035] One target LCID, which indicates the format of the BSR of the SCG and / or the format of the BSR of the MCG.

[0036] Two target LCIDs, which respectively indicate the format of the BSR of the SCG and the format of the BSR of the MCG.

[0037] In a case where the target information includes the target RRC signaling, the target RRC signaling includes DRB identification information of the SCG having data to be transmitted, and the DRB identification information is indicated by a bitmap.

[0038] The bitmap includes any one of the following:

[0039] IDs of all MCGs and IDs of all SCGs;

[0040] DRB IDs of the SCG having radio link control (RLC) bearers;

[0041] DRB IDs of the SCG having RLC bearers, and the RLC bearers do not belong to split bearers.

[0042] DRB IDs of the SCG having RLC bearers, and in a case where the RLC bearers are split bearers, the RLC bearers only include split bearers in the SCG.

[0043] In an embodiment, in the case that the target information comprises the target RRC signaling, the target RRC signaling comprises a DRB ID of the SCG having data to be transmitted, and the DRB ID is any one of the following:

[0044] a DRB ID of an RLC bearer in the SCG;

[0045] a DRB ID of an RLC bearer in the SCG, and the RLC bearer does not belong to a split bearer;

[0046] a DRB ID of an RLC bearer in the SCG, and in the case that the RLC bearer is a split bearer, the RLC bearer only comprises a split bearer in the SCG of a master path.

[0047] In an embodiment, in the case that the target information comprises the target RRC signaling, the target RRC signaling comprises logical channel identification information of the SCG having data to be transmitted, and the logical channel identification information is represented in a bitmap manner or in a LCID list manner.

[0048] The logical channel identification information satisfies any one of the following:

[0049] The logical channel identification information comprises a bearer, and in the case that the bearer is a split bearer, the bearer only comprises a split bearer in the SCG of a master path.

[0050] The logical channel identification information comprises a bearer, and the bearer does not belong to a split bearer.

[0051] The logical channel identification information comprises a bearer, and the bearer does not belong to a split bearer in the MCG of a master path.

[0052] In an embodiment, in the case that the target information comprises the target RRC signaling, the target RRC signaling comprises logical channel group identification information of the SCG having data to be transmitted, and the logical channel group identification information is represented in a bitmap manner or in a LCG ID list manner.

[0053] In an embodiment, in the case that the target information comprises the target RRC signaling, the target RRC signaling comprises indication information of the SCG having data to be transmitted.

[0054] In an embodiment, in the case that the target information comprises the target RRC signaling, the target RRC signaling comprises size information of data to be transmitted of the SCG;

[0055] wherein the size of data to be transmitted of the SCG is in any one of per-DRB, per-LC, per-LCG, or per-SCG.

[0056] In a second aspect, the embodiments of the present application provide a method for transmitting buffer status information of a secondary cell group, comprising:

[0057] In a case where a secondary cell group (SCG) is in a deactivated state, receiving target information transmitted by a terminal through a master cell group (MCG); the target information is used to indicate buffer status information of the SCG;

[0058] The target information comprises at least one of the following:

[0059] Target buffer status report (BSR);

[0060] Target radio resource control (RRC) signaling.

[0061] In an embodiment, in a case where the target information comprises the target BSR, a logical channel ID (LCID) corresponding to the target BSR comprises:

[0062] A target LCID value corresponding to a predetermined Codepoint and / or Index parameter value, the target LCID value corresponding to a format of a BSR of the SCG;

[0063] One target LCID value corresponds to one format of a BSR of the SCG; the format of the BSR of the SCG comprises any one of a short format, a long format, a short truncated format and a long truncated format.

[0064] In an embodiment, in a case where the target information comprises the target BSR, an LCID corresponding to the target BSR comprises:

[0065] A target LCID value corresponding to a predetermined Codepoint and / or Index parameter value, the target LCID value corresponding to a format of a BSR of the SCG;

[0066] The BSR medium access control (MAC) control element (CE) corresponding to the predetermined format of the BSR of the SCG comprises at least one of the following:

[0067] SCG index;

[0068] Logical channel group (LCG) bitmap;

[0069] LCG ID;

[0070] LCID;

[0071] LCID bitmap;

[0072] LCID index bitmap;

[0073] LCID index;

[0074] LCID bitmap length indication information;

[0075] LCID index length indication information;

[0076] Buffer data information;

[0077] Indication information of whether there is a non-reported BSR.

[0078] In one embodiment, in a case where the target information includes the target BSR, the reserved bit of the MAC subheader corresponding to the target BSR includes any one of the following:

[0079] In a case where the MAC subheader includes one reserved bit, the reserved bit indicates whether the target BSR is a BSR of the SCG;

[0080] In a case where the MAC subheader includes two reserved bits, any one of the two reserved bits indicates whether the target BSR is a BSR of the SCG;

[0081] In a case where the MAC subheader includes two reserved bits, one of the two reserved bits indicates whether the target BSR is a BSR of the SCG, and the other indicates whether the target BSR is a BSR of the MCG;

[0082] In a case where the MAC subheader includes two reserved bits, the two reserved bits indicate an SCG index; the SCG index is used to indicate which SCG the target BSR is a BSR of;

[0083] Wherein the format of the target BSR is any one of a short format, a long format, a short truncated format, a long truncated format, and a predetermined format.

[0084] In one embodiment, in a case where one of the two reserved bits indicates whether the target BSR is a BSR of the SCG, and the other indicates whether the target BSR is a BSR of the MCG, the MAC subheader corresponding to the target BSR includes any one of the following:

[0085] One target LCID is used to indicate the format of the BSR of the SCG and / or the format of the BSR of the MCG;

[0086] Two target LCIDs are respectively used to indicate the format of the BSR of the SCG and the format of the BSR of the MCG.

[0087] In an embodiment, in the case that the target information comprises the target RRC signaling, the target RRC signaling comprises DRB identification information of SCG data radio bearer (DRB) having data to be transmitted, and the DRB identification information is represented in the form of bitmap.

[0088] The bitmap comprises any of the following:

[0089] ID of all MCGs and ID of all SCGs;

[0090] DRB ID of SCG having radio link control (RLC) bearer;

[0091] DRB ID of SCG having RLC bearer, and the RLC bearer does not belong to split bearer;

[0092] DRB ID of SCG having RLC bearer, and in the case that the RLC bearer is split bearer, the RLC bearer only comprises split bearer of master path in SCG.

[0093] In an embodiment, in the case that the target information comprises the target RRC signaling, the target RRC signaling comprises DRB ID of SCG having data to be transmitted, and the DRB ID is any of the following:

[0094] DRB ID of SCG having RLC bearer;

[0095] DRB ID of SCG having RLC bearer, and the RLC bearer does not belong to split bearer;

[0096] DRB ID of SCG having RLC bearer, and in the case that the RLC bearer is split bearer, the RLC bearer only comprises split bearer of master path in SCG.

[0097] In an embodiment, in the case that the target information comprises the target RRC signaling, the target RRC signaling comprises logical channel identification information of SCG having data to be transmitted, and the logical channel identification information is represented in the form of bitmap or represented in the form of LCID list.

[0098] The logical channel identification information satisfies any of the following:

[0099] The logical channel identification information comprises bearer, and in the case that the bearer is split bearer, the bearer only comprises split bearer of master path in SCG;

[0100] The logical channel identification information comprises bearer, and the bearer does not belong to split bearer;

[0101] The logical channel identification information includes a bearer, and the bearer does not belong to a separated bearer of the master path in the MCG.

[0102] In one embodiment, in a case where the target information includes the target RRC signaling, the target RRC signaling includes logical channel group identification information of the SCG having data to be transmitted, the logical channel group identification information is represented in a bitmap manner or in a manner of a list of LCG IDs.

[0103] In one embodiment, in a case where the target information includes the target RRC signaling, the target RRC signaling includes indication information of the SCG having data to be transmitted.

[0104] In one embodiment, in a case where the target information includes the target RRC signaling, the target RRC signaling includes size information of data to be transmitted of the SCG.

[0105] The size of the data to be transmitted of the SCG is in any one of units of per DRB, per LC, per LCG, and per SCG.

[0106] In one embodiment, the method for transmitting the buffer data state information of the secondary cell group provided by the embodiments of the present application further includes:

[0107] According to the target information, at least one of the following is performed:

[0108] Reconfiguring target bearers for the MCG and / or the SCG;

[0109] Activating the SCG;

[0110] The target bearers are used to transmit data corresponding to the buffer data state information of the SCG.

[0111] In a third aspect, the embodiments of the present application provide a terminal, including a memory, a transceiver, and a processor, wherein:

[0112] The memory is configured to store a computer program; the transceiver is configured to transceive data under control of the processor; and the processor is configured to read the computer program in the memory and implement steps of the method for transmitting the buffer data state information of the secondary cell group according to the first aspect.

[0113] In a fourth aspect, the embodiments of the present application provide a network device, including a memory, a transceiver, and a processor, wherein:

[0114] a memory for storing a computer program; a transceiver for transceiving data under control of the processor; and the processor for reading the computer program in the memory and implementing the steps of the method for transmitting buffer data status information of a secondary cell group as described in the second aspect.

[0115] In a fifth aspect, the embodiments of the present application further provide a processor-readable storage medium, which stores a computer program for causing a processor to perform the steps of the method for transmitting buffer data status information of a secondary cell group as described in the first aspect or the second aspect.

[0116] The method and device for transmitting buffer data status information of a secondary cell group provided by the embodiments of the present application achieve the function of the terminal indicating the buffer data status information of the SCG side by enabling the network device to receive the target information containing the buffer data status information of the SCG sent by the terminal through the MCG side when the SCG is in the deactivated state, so that the network device can decide and perform corresponding operations to make the uplink data of the SCG side be successfully reported according to the buffer data status information of the SCG side reported by the terminal when the SCG is in the deactivated state, thereby significantly improving the stability and efficiency of communication compared with the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0117] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0118] Figure 1 A schematic diagram of the MAC CE of the long BSR and the long truncated BSR;

[0119] Figure 2 One of the schematic diagrams of the header field of the MAC subheader;

[0120] Figure 3 The second schematic diagram of the header field of the MAC subheader;

[0121] Figure 4 One of the flow schematic diagrams of the method for transmitting buffer data status information of a secondary cell group provided by the embodiments of the present application;

[0122] Figure 5 The second flow schematic diagram of the method for transmitting buffer data status information of a secondary cell group provided by the embodiments of the present application;

[0123] Figure 6 The structural schematic diagram of the network device according to the embodiments of the present application;

[0124] Figure 7 Structure diagram of a terminal according to an embodiment of the present application;

[0125] Figure 8 Structure diagram of a buffer data state information transmission device for a secondary cell group according to an embodiment of the present application;

[0126] Figure 9 Structure diagram of a buffer data state information transmission device for a secondary cell group according to an embodiment of the present application. DETAILED DESCRIPTION

[0127] In the embodiments of the present application, the term "and / or" describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can mean that there are three cases of A alone, A and B together, and B alone. The character " / " generally represents an "or" relationship between the associated objects before and after it.

[0128] In the embodiments of the present application, the term "a plurality of" means two or more, and other quantifiers are similar.

[0129] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0130] In order to fully understand the technical solutions of the present application, the following contents will be introduced:

[0131] In a multi-connection scenario, there is one MCG and one to multiple SCGs. The cell group on the MN (Master Node) side is the MCG, which is composed of one PCell (Primary Cell) and zero to multiple SCells (Secondary Cells). The cell group on the SN (Secondary Node) side is the SCG, which is also composed of one PSCell and zero to multiple SCGs. The current protocol version only supports a dual-connection scenario. In a connected state, the terminal is configured with dual connectivity, and the MN and the SN can simultaneously interact with the terminal for data.

[0132] In consideration of energy saving and fast activation of SCG for data transmission, the terminal can set the SCG side to the deactivated SCG state in the case of small data transmission volume, and the terminal does not monitor the PDCCH (Physical Downlink Control Channel) of the SCG side and does not perform PUSCH (Physical Uplink Shared Channel) transmission in the deactivated SCG state.

[0133] (I) Activation / deactivation of SCG

[0134] The MN / SN can request to activate the SCG, and the network-triggered SCG activation command is sent by the MN to the terminal. The MN / SN can request to deactivate the SCG, and the network-triggered SCG deactivation command is sent by the MN to the terminal. In the SCG activation / deactivation process, RRC (Radio Resource Control) signaling is used for the interaction between the terminal / MN and the MN / SN.

[0135] (II) BSR

[0136] The BSR process is used to provide the uplink data volume in the MAC entity for the serving gNB (5G base station).

[0137] Each logical channel can be allocated to an LCG (Logical Channel Group), and the maximum number of LCGs is 8. According to the data volume calculation process, the MAC entity determines the uplink data volume of a logical channel.

[0138] The BSR reporting format is divided into long BSR (Long BSR), short BSR (Short BSR), short truncated BSR (Short Truncated BSR), and long truncated BSR (Long Truncated BSR). Different reporting formats are selected according to the number of LCGs with transmittable data and the number of padding bits. Different BSR formats are distinguished by different LCID (Logical Channel ID) in the MAC subPDU (sub-protocol data unit) header.

[0139] The BSR reporting is in the granularity of LCG, and the size of the data to be transmitted of the LCG is reported to the network side. Taking the MAC CE (Control Element) of long BSR and long truncated BSR as an example: as shown in the following table: Figure 1As shown, each LCGi indicates whether the ith LCG has data to be transmitted Buffer Size is reported, LCGi is 1, indicating that the Buffer Size field of this LCG is reported, LCGi is 0, indicating that the Buffer Size field of this LCG is not reported, i is 0-7, i.e. there are 8 LCGs in total.

[0140] (III) MAC PDU (Protocol Data Unit)

[0141] A MAC PDU includes one or more MAC subPDUs, each of which consists of one of the following:

[0142] a MAC subheader, including padding;

[0143] a MAC subheader and a MAC SDU (Service Data Unit);

[0144] a MAC subheader and a MAC CE;

[0145] a MAC subheader and padding.

[0146] The size of the MAC SDU is not the same, and each MAC subheader corresponds to a MAC SDU, a MAC CE or padding.

[0147] In addition to fixed-size MAC CEs, padding and MAC SDUs containing uplink CCCH (Common Control Channel), a MAC subheader consists of a header field R / F / LCID / (eLCID) / L, such as Figure 2 As shown, one of the formats is 8-bit L.

[0148] The MAC subheader for fixed-size MAC CEs, padding and MAC SDUs containing uplink CCCH consists of two header fields R / LCID / (eLCID), such as Figure 3 As shown, one of the formats is 8-bit L.

[0149] Explanation of each field:

[0150] LCID: for DL-SCH (Downlink Synchronization Channel) and UL-SCH (Uplink Synchronization Channel) respectively, corresponding to the MAC SDU logical channel instance or the corresponding MAC CE type or padding;

[0151] eLCID: extended LCID;

[0152] L: Length of the corresponding MAC SDU or variable size MAC CE (in bytes)

[0153] F: Size of the length field

[0154] R: Reserved bit, set to 0.

[0155] The values of LCID of the UL-SCH are shown in the following table:

[0156] Table 1 Values of LCID of the UL-SCH

[0157]

[0158] Embodiments of the present application provide a secondary cell group buffer data state information transmission method and device to solve the technical problem that the terminal cannot indicate the buffer data state information of the SCG in the prior art.

[0159] The method and the device are based on the same application concept. Since the principles of the method and the device for solving problems are similar, the implementation of the device and the method can be mutually referred to, and the repeated parts will not be described again.

[0160] Figure 4 One of the flowcharts of the secondary cell group buffer data state information transmission method provided by the embodiments of the present application is shown. Referring to Figure 4 The secondary cell group buffer data state information transmission method provided by the embodiments of the present application can include the following steps.

[0161] Step 410: receiving target information sent by the terminal through the MCG in the case that the SCG is in the deactivated state; the target information is used to indicate the buffer data state information of the SCG.

[0162] The target information includes at least one of the following:

[0163] Target BSR;

[0164] Target signaling.

[0165] The buffer data state information of the SCG is used to represent that there is data reaching the SCG side and the content related to the data.

[0166] It should be noted that the execution subject of the secondary cell group buffer data state information transmission method provided by the embodiments of the present application can be a network device, such as a base station.

[0167] When the SCG is in the deactivated state, in the scenario that the uplink data of the terminal reaches the RLC bearer of the SCG, the terminal will send target information to the network device through the MCG.

[0168] After the network device receives the target information sent by the terminal through the MCG, the network device parses the buffer data state information of the SCG included in the target information to determine that the SCG has uplink data to be reported at this time, and thus performs corresponding operations to make the uplink data of the SCG reported to the network device.

[0169] The target information can include a target BSR and a target RRC signaling. The target BSR can refer to a BSR sent by the terminal to the network device through the MCG, and the target RRC can refer to an RRC sent by the terminal to the network device through the MCG.

[0170] The buffer data state information transmission method of the secondary cell group provided by the embodiments of the present application enables the network device to receive the target information including the buffer data state information of the SCG sent by the terminal through the MCG when the SCG is in the deactivated state, realizes the function of the terminal indicating the buffer data state information of the SCG, and thus enables the network device to decide and perform corresponding operations to make the uplink data of the SCG successfully reported according to the buffer data state information of the SCG reported by the terminal when the SCG is in the deactivated state, which significantly improves the stability and efficiency of communication compared with the prior art.

[0171] In one embodiment, when the target information includes a target BSR, the LCID in the MAC subPDU header where the BSR MAC CE corresponding to the target BSR is located can include:

[0172] The predetermined Codepoint and / or Index parameter value corresponds to a target LCID value, and the target LCID value corresponds to the format of the BSR of the SCG.

[0173] The format of the BSR of the SCG includes one or more of a short format, a long format, a short truncated format, and a long truncated format.

[0174] It should be noted that the predetermined Codepoint and / or Index parameter value can be a reserved Codepoint and / or Index parameter value in the LCID, a reserved Codepoint and / or Index parameter value in the eLCID, or a preset Codepoint and / or Index parameter value other than the above two.

[0175] For example, the predetermined Codepoint and / or Index parameter value can be a reserved Codepoint and / or Index parameter value of 35 to 44 in the LCID, or a reserved Codepoint parameter value of 0 to 249 and / or a reserved Index parameter value of 64 to 313 in the eLCID, or a reserved Codepoint parameter value of 0 to (216 -1) Codepoint parameter value and / or 320 to (2 16 +319) Index parameter value.

[0176] It should be noted that the Codepoint parameter and the Index parameter value can be the same or different, for example, the Codepoint parameter and the Index parameter in the LCID are the same, and the Codepoint parameter and the Index parameter in the eLCID are different.

[0177] For example:

[0178] 1a, any four of the reserved 35 to 44 Codepoint and / or Index parameters correspond to four target LCID values respectively, and the four target LCID values correspond to the short format BSR, the long format BSR, the short truncated format BSR and the long truncated format BSR of the SCG respectively.

[0179] For example, index 35 can be used to represent the first target LCID value, which corresponds to the short truncated format BSR of the SCG, index 36 represents the second target LCID value, which corresponds to the long truncated format BSR of the SCG, index 37 represents the third target LCID value, which corresponds to the short format BSR of the SCG, and index 38 represents the fourth target LCID value, which corresponds to the long format BSR of the SCG.

[0180] When the value of the LCID corresponds to index 35, the network device can determine that the target BSR is the short truncated format BSR of the SCG after receiving the target BSR. Then, the network device reads the information in the target BSR to know which LCG has data to be transmitted, so as to determine which SCG bearer has data to be transmitted.

[0181] 1b, any four of the reserved 0 to 249 Codepoint and / or 64 to 313 Index parameters correspond to four target LCID values respectively, and the four target LCID values correspond to the short format BSR, the long format BSR, the short truncated format BSR and the long truncated format BSR of the SCG respectively.

[0182] For example, index 65 can be used to represent a first target LCID value corresponding to a short truncated format BSR for SCG, index 66 can be used to represent a second target LCID value corresponding to a long truncated format BSR for SCG, index 67 can be used to represent a third target LCID value corresponding to a short format BSR for SCG, and index 68 can be used to represent a fourth target LCID value corresponding to a long format BSR for SCG.

[0183] When the value of the LCID corresponds to index 65, the network device, upon receiving the target BSR, can determine that the target BSR is a short truncated format BSR for SCG. Then, the network device can read the information in the target BSR to learn which LCGs have data to be transmitted, and thus determine which SCG bearers have data to be transmitted.

[0184] 1c. The four preset Codepoint and / or Index parameter values correspond to four target LCID values, respectively, the four target LCID values corresponding to a short format BSR for SCG, a long format BSR for SCG, a short truncated format BSR for SCG, and a long truncated format BSR for SCG, respectively.

[0185] For example, a first preset Codepoint and / or Index parameter value can be used to represent a first target LCID value corresponding to a short truncated format BSR for SCG, a second preset Codepoint and / or Index parameter value can be used to represent a second target LCID value corresponding to a long truncated format BSR for SCG, a third preset Codepoint and / or Index parameter value can be used to represent a third target LCID value corresponding to a short format BSR for SCG, and a fourth preset Codepoint and / or Index parameter value can be used to represent a fourth target LCID value corresponding to a long format BSR for SCG.

[0186] When the value of the LCID corresponds to the first preset Codepoint and / or Index parameter value, the network device, upon receiving the target BSR, can determine that the target BSR is a short truncated format BSR for SCG. Then, the network device can read the information in the target BSR to learn which LCGs have data to be transmitted, and thus determine which SCG bearers have data to be transmitted.

[0187] 2a, any two of the reserved Codepoint and / or Index parameters 35 to 44 respectively correspond to two target LCID values, and the two target LCID values can correspond to any two formats of the BSR of the SCG. For example, the two target LCID values can respectively correspond to the short format of the BSR of the SCG and the long format of the BSR of the SCG. Specifically, index 35 can be used to represent a first target LCID value, and the first target LCID value corresponds to the short format of the BSR of the SCG, index 36 represents a second target LCID value, and the second target LCID value corresponds to the long format of the BSR of the SCG.

[0188] When the value of the LCID corresponds to index 35, the network device can determine that the target BSR is the short format of the BSR of the SCG after receiving the target BSR. Then, the network device reads the information in the target BSR to know which LCG has data to be transmitted, so as to determine which SCG bearer has data to be transmitted.

[0189] 2b, any two of the reserved Codepoint and / or Index parameters 0 to 249 respectively correspond to two target LCID values, and the two target LCID values can correspond to any two formats of the BSR of the SCG. For example, the two target LCID values respectively correspond to the short format of the BSR of the SCG and the long format of the BSR of the SCG. Specifically, index 65 can be used to represent a first target LCID value, and the first target LCID value corresponds to the short format of the BSR of the SCG, index 66 represents a second target LCID value, and the second target LCID value corresponds to the long format of the BSR of the SCG.

[0190] When the value of the LCID corresponds to index 65, the network device can determine that the target BSR is the short format of the BSR of the SCG after receiving the target BSR. Then, the network device reads the information in the target BSR to know which LCG has data to be transmitted, so as to determine which SCG bearer has data to be transmitted.

[0191] 2c, two Codepoint and / or Index parameter values are respectively correspond to two target LCID values, and the two target LCID values can correspond to any two formats of the BSR of the SCG. For example, the two target LCID values respectively correspond to the short format of the BSR of the SCG and the long format of the BSR of the SCG.

[0192] For example, a first pre-set Codepoint and / or Index parameter value can be used to represent a first target LCID value corresponding to a short format BSR of SCG, and a second pre-set Codepoint and / or Index parameter value can be used to represent a second target LCID value corresponding to a long format BSR of SCG.

[0193] When the value of LCID corresponds to the first pre-set Codepoint and / or Index parameter value, the network device can determine, after receiving the target BSR, that the target BSR is a short format BSR of SCG. Then, the network device can read the information in the target BSR to learn which LCGs have data to be transmitted, and thus determine which SCG bearers have data to be transmitted.

[0194] 3a. Any one of the reserved Codepoints and / or Index parameters from 35 to 44 can correspond to one target LCID value, and the target LCID value can be any one of the four formats of BSR of SCG. For example, if a short format BSR of SCG is defined as 0, a long format BSR of SCG is defined as 1, a short truncated format BSR of SCG is defined as 2, and a long truncated format BSR of SCG is defined as 3, then any one of the target LCID values marked as 3 corresponds to a long truncated format BSR of SCG, any one of the target LCID values marked as 0 corresponds to a short format BSR of SCG, and so on.

[0195] For example, index 37 can be used to represent a target LCID value, and the target LCID value is assumed to be 3. When the value of LCID corresponds to index 37, the network device can determine, after receiving the target BSR, that the target BSR is a long truncated format BSR of SCG. Then, the network device can read the information in the target BSR to learn which LCGs have data to be transmitted, and thus determine which SCG bearers have data to be transmitted.

[0196] 3b. Any one of the reserved Codepoint parameters from 0 to 249 and / or Index parameters from 64 to 313 can correspond to one target LCID value, and the target LCID value can be any one of the four formats of BSR of SCG. For example, if a short format BSR of SCG is defined as 0, a long format BSR of SCG is defined as 1, a short truncated format BSR of SCG is defined as 2, and a long truncated format BSR of SCG is defined as 3, then any one of the target LCID values marked as 3 corresponds to a long truncated format BSR of SCG, any one of the target LCID values marked as 0 corresponds to a short format BSR of SCG, and so on.

[0197] For example, index 37 or index 67 can be used to represent the target LCID value, assuming the target LCID value is 3, which corresponds to the long truncated format of the BSR of the SCG.

[0198] When the value of the LCID corresponds to index 37 or index 67, the network device can determine that the target BSR is the BSR of the long truncated format of the SCG after receiving the target BSR. Then, the network device can read the information in the target BSR to know which LCGs have data to be transmitted, so as to determine which SCG bearers have data to be transmitted.

[0199] 3c, one target LCID value corresponds to one preset Codepoint and / or Index parameter value, and the target LCID value can be any one of the four formats of the BSR of the SCG. For example: the BSR of the short format of the SCG is defined as 0, the BSR of the long format is defined as 1, the BSR of the short truncated format is defined as 2, and the BSR of the long truncated format is defined as 3. Any one corresponding to one target LCID value is marked as 3, which means that the target LCID value corresponds to the BSR of the long truncated format of the SCG; any one corresponding to one target LCID value is marked as 0, which means that the target LCID value corresponds to the BSR of the short format of the SCG; and so on.

[0200] When the value of the LCID corresponds to the preset Codepoint and / or Index parameter value, the network device can determine the format of the target BSR according to the preset Codepoint and / or Index parameter value after receiving the target BSR. Then, the network device can read the information in the target BSR to know which LCGs have data to be transmitted, so as to determine which SCG bearers have data to be transmitted.

[0201] In one embodiment, in the case that the target information includes the target BSR, the LCID corresponding to the target BSR can include:

[0202] The predetermined Codepoint and / or Index parameter value corresponds to the target LCID value, and the target LCID value corresponds to the BSR of the predetermined format of the SCG; the BSR MAC CE corresponding to the BSR of the predetermined format can include at least one of the following:

[0203] 1. SCG index (index), indicating which SCG the target BSR is;

[0204] 2. LCG bitmap (bitmap), indicating the LCG bitmap of the SCG that has data to be transmitted, wherein 1 bit represents one LCG;

[0205] 3. LCG ID, indicating the LCG ID of the SCG having data to be transmitted;

[0206] 4. LCID, indicating the LCID of the SCG having data to be transmitted;

[0207] 5. LCID bitmap, indicating the LCID bitmap of the SCG having data to be transmitted, wherein 1 bit represents one LC;

[0208] 6. LCID index bitmap; wherein the LCID index is used to identify the corresponding LCID, for example, the SCG only has LCID / drbID 5 / 6 / 7 / 8 / 9 / 31 associated with DRB (Data Radio Bearer) or associated with uplink transmission RLC bearer, then according to the preset order such as LCID size order sorting coding, index = 0 corresponds to LCID 5, index = 1 corresponds to LCID 6, index = 2 corresponds to LCID 7, index = 3 corresponds to LCID 8, index = 4 corresponds to LCID 9, index = 5 corresponds to LCID 31, that is, the first 6 bits of 8 bits of the bitmap respectively represent LCID 5 / 6 / 7 / 8 / 9 / 31, the last 2 bits can be empty or 0, and the following corresponds to the buffer size of each LCID having data to be transmitted in order.

[0209] 7. LCID index; wherein the LCID index is used to identify the corresponding LCID, for example, the SCG only has LCID / drbID 5 / 6 / 7 / 8 / 9 / 31 associated with DRB or associated with uplink transmission RLC bearer, then according to the preset order such as LCID size order sorting coding, index = 0 corresponds to LCID 5, index = 1 corresponds to LCID 6, index = 2 corresponds to LCID 7, index = 3 corresponds to LCID 8, index = 4 corresponds to LCID 9, index = 5 corresponds to LCID 31, and the index 0, 1, 2, 3, 4, 5 are recorded.

[0210] 8. LCID bitmap length indication information; wherein the indication information indicates the length of the LCID bitmap, such as indicating that the length of the LCID bitmap can be 8 bits, 16 bits, 32 bits, etc. The LCs associated with DRB or associated with uplink transmission RLC bearer are included in order, and the excess bits are set to 0.

[0211] 9. LCID index length indication information; this information indicates the length of the LCID index, such as 3 bits, 4 bits, 5 bits, etc. It sequentially includes the logical channels associated with the DRB or the RLC bearer associated with the uplink transmission, with any extra bits set to 0.

[0212] 10. Buffered data information, indicating the amount of buffered data; the amount of buffered data can be in units of LCG or in units of LC.

[0213] 11. Indication information for unreported BSRs, used to indicate whether there are currently any unreported BSRs by SCGs.

[0214] For example,

[0215] The target LCID value can be represented by index 66, which corresponds to the BSR in the predefined format of SCG.

[0216] When the LCID value corresponds to index 66, the network device, upon receiving the target BSR, can determine that the target BSR is a BSR in a predetermined format for an SCG. Next, the network device reads the information from the target BSR, obtaining information such as the SCG index, LCG, LC, and buffered data, thereby determining which SCGs carry data to be transmitted.

[0217] In one embodiment, when the target information includes a target BSR, the reserved bits of the MAC subheader corresponding to the target BSR include any of the following:

[0218] 1. When the MAC subheader includes a reserved bit, the reserved bit indicates whether the target BSR is the BSR of the SCG;

[0219] For example, when the reserved bit R in the MAC subheader of the MAC sub-PDU containing BSR MAC CE is 1, it indicates that the target BSR is an SCG BSR; when the reserved bit R is 0, it indicates that the target BSR is not an SCG BSR. Or,

[0220] When the reserved bit R is 0, it can indicate that the target BSR is an SCG BSR; when the reserved bit R is 1, it can indicate that the target BSR is not an SCG BSR.

[0221] After receiving the target BSR, the network device can determine whether the target BSR is the BSR of an SCG by checking the reserved bits in the MAC subheader corresponding to the target BSR. Then, the network device reads the information in the target BSR to determine which LCGs have data to be transmitted, thereby identifying which SCGs carry data to be transmitted.

[0222] 2. In the case that the MAC subheader includes two reserved bits, either of the two reserved bits indicates whether the target BSR is the BSR of the SCG;

[0223] For example, when the first reserved bit R in the MAC subheader of the MAC sub-PDU where the BSR MAC CE is located indicates the BSR of the SCG, the target BSR can be the BSR of the SCG; when the first reserved bit R is 0, the target BSR can not be the BSR of the SCG. Or,

[0224] When the first reserved bit R is 0, the target BSR can be the BSR of the SCG; when the first reserved bit R is 1, the target BSR can not be the BSR of the SCG.

[0225] After the network device receives the target BSR, it can determine whether the target BSR is the BSR of the SCG according to the value of the first reserved bit in the MAC subheader corresponding to the target BSR. Then the network device will read the information in the target BSR to know which LCG has data to be transmitted, so as to determine which SCG bearer has data to be transmitted.

[0226] 3. In the case that the MAC subheader includes two reserved bits, one of the two reserved bits indicates whether the target BSR is the BSR of the SCG, and the other indicates whether the target BSR is the BSR of the MCG;

[0227] In this case, the MAC subheader corresponding to the target BSR can include any of the following:

[0228] One target LCID is used to indicate the format of the BSR of the SCG and / or the format of the BSR of the MCG;

[0229] Two target LCIDs are used to indicate the format of the BSR of the SCG and the format of the BSR of the MCG, respectively.

[0230] For example, when the first reserved bit R in the MAC subheader of the MAC sub-PDU where the BSR MAC CE is located indicates the BSR of the SCG, and the second reserved bit R also indicates the BSR of the MCG, the target BSR can include both the BSR of the SCG and the BSR of the MCG; if the MAC subheader includes only one target LCID indicating a long BSR at this time, it indicates that both the BSR of the SCG and the BSR of the MCG are long BSRs.

[0231] When the first reserved bit R in the MAC subheader of the MAC subPDU where the BSR MAC CE is located indicates the BSR of the SCG, and the second reserved bit R also indicates the BSR of the MCG, it can be indicated that the target BSR includes both the BSR of the SCG and the BSR of the MCG; if at this time the MAC subheader includes two target LCIDs respectively indicating that the BSR of the SCG is a long BSR and the BSR of the MCG is a short BSR, at this time the BSR of the SCG is a long BSR and the BSR of the MCG is a short BSR.

[0232] After the network device receives the target BSR, the network device can determine whether the target BSR is the BSR of the SCG and / or the BSR of the MCG according to the values of the first reserved bit and the second reserved bit of the MAC subheader corresponding to the target BSR. Then the network device reads the information in the target BSR to know which LCGs have data to be transmitted, so as to determine which SCGs carry data to be transmitted.

[0233] 4. In the case where the MAC subheader includes two reserved bits, the two reserved bits indicate the SCG index; the SCG index is used to indicate which SCG the target BSR is for;

[0234] For example, when the values of the two reserved bits R in the MAC subheader of the MAC subPDU where the BSR MAC CE is located are 01, it can be indicated that the target BSR is the BSR of the SCG with index = 01.

[0235] After the network device receives the target BSR, the network device can determine which SCG the target BSR is for according to the values of the two reserved bits of the MAC subheader corresponding to the target BSR. Then the network device reads the information in the target BSR to know which LCGs have data to be transmitted, so as to determine which SCGs carry data to be transmitted.

[0236] The format of the target BSR is any one of a short format, a long format, a short truncated format, a long truncated format, and a predetermined format.

[0237] The method for transmitting the buffer status information of the secondary cell group provided by the embodiments of the present application can realize the function of indicating the buffer status information of the SCG side of the terminal by corresponding setting of the related information (LCID, eLCID, and reserved bit, etc.) of the BSR, and can realize low-cost and efficient modification of the existing network.

[0238] In one embodiment, in the case where the target information includes target RRC signaling, the target RRC signaling includes DRB identification information of the SCG with data to be transmitted, and the DRB identification information is indicated by a bitmap; wherein the bitmap includes any one of the following:

[0239] 1. IDs of all MCGs and IDs of all SCGs;

[0240] After the network device receives the target RRC signaling, it can determine which DRBs have data to be transmitted by reading the bitmap of all DRBs therein.

[0241] 2. DRB IDs with RLC bearers in SCG;

[0242] After the network device receives the target RRC signaling, it can determine which DRBs have data to be transmitted by reading the bitmap of the DRB IDs with RLC bearers in SCG.

[0243] 3. DRB IDs with RLC bearers in SCG, and the RLC bearers do not belong to split bearers;

[0244] After the network device receives the target RRC signaling, it can determine which DRBs have data to be transmitted by reading the bitmap of the DRB IDs with RLC bearers in SCG but not belonging to split bearers.

[0245] 4. DRB IDs with RLC bearers in SCG, and in the case of RLC bearers being split bearers, the RLC bearers only include split bearers with the master path in SCG.

[0246] After the network device receives the target RRC signaling, it can determine which DRBs have data to be transmitted by reading the bitmap of the DRB IDs with RLC bearers in SCG and in the case of RLC bearers being split bearers, the RLC bearers only include split bearers with the master path in SCG.

[0247] In one embodiment, in the case that the target information includes target RRC signaling, the target RRC signaling includes DRB IDs with data to be transmitted in SCG, and the DRB IDs are any of the following:

[0248] 1. DRB IDs with RLC bearers in SCG, which can be in the form of a DRB ID list, etc.

[0249] After the network device receives the target RRC signaling, it can determine which DRBs have data to be transmitted by reading the DRB ID list information indicating RLC bearers in SCG.

[0250] 2. DRB IDs with RLC bearers in SCG, and the RLC bearers do not belong to split bearers, which can be in the form of a DRB ID list, etc.

[0251] The network device receives the target RRC signaling, reads the DRB ID indicating the RLC bearer in the SCG in the target RRC signaling, and reads the DRB ID list information indicating that the RLC bearer includes only the split bearer of the master path in the SCG in the case of the RLC bearer being a split bearer, and determines which DRBs have data to be transmitted.

[0252] 3. The DRB ID of the RLC bearer in the SCG, and in the case of the RLC bearer being a split bearer, the RLC bearer includes only the split bearer of the master path in the SCG, can be in the form of a DRB ID list, etc.

[0253] The network device receives the target RRC signaling, reads the DRB ID indicating the RLC bearer in the SCG in the target RRC signaling, and reads the DRB ID list information indicating that the RLC bearer includes only the split bearer of the master path in the SCG in the case of the RLC bearer being a split bearer, and determines which DRBs have data to be transmitted.

[0254] In one embodiment, in the case that the target information includes target RRC signaling, the target RRC signaling includes logical channel identification information of the SCG having data to be transmitted, the logical channel identification information is represented in the form of a bitmap, or represented in the form of an LCID list;

[0255] The logical channel identification information satisfies any of the following:

[0256] 1. The logical channel identification information includes a bearer, and in the case of the bearer being a split bearer, the bearer includes only the split bearer of the master path in the SCG;

[0257] The network device receives the target RRC signaling, reads the bitmap information or LCID list indicating that the logical channel identification information includes a bearer, and in the case of the bearer being a split bearer, the bearer includes only the split bearer of the master path in the SCG, and determines which LCs have data to be transmitted, thereby determining which DRBs have data to be transmitted.

[0258] 2. The logical channel identification information includes a bearer, and the bearer does not belong to a split bearer;

[0259] The network device receives the target RRC signaling, reads the bitmap information or LCID list indicating that the logical channel identification information includes a bearer, and the bearer does not belong to a split bearer, and determines which LCs have data to be transmitted, thereby determining which DRBs have data to be transmitted.

[0260] 3. The logical channel identification information includes a bearer, and the bearer does not belong to a split bearer of the master path in the MCG.

[0261] The network device receives the target RRC signaling, reads the logical channel identifier information including the bearer in the target RRC signaling, and the bearer does not belong to the bitmap information or LCID list of the separated bearer of the main path in the MCG, can determine which LC has data to be transmitted, and then determine which DRB has data to be transmitted.

[0262] In one embodiment, in the case that the target information includes the target RRC signaling, the target RRC signaling includes logical channel group identifier information of the SCG having data to be transmitted, and the logical channel group identifier information is represented by a bitmap or an LCG ID list.

[0263] The network device receives the target RRC signaling, reads the bitmap information or LCG ID list indicating that the SCG has data to be transmitted in the target RRC signaling, can determine which LCG has data to be transmitted, and then determine which DRB has data to be transmitted.

[0264] In one embodiment, in the case that the target information includes the target RRC signaling, the target RRC signaling includes indication information of the SCG having data to be transmitted.

[0265] The network device receives the target RRC signaling, reads the indication information of the SCG having data to be transmitted in the target RRC signaling, and can determine that the SCG has data to be transmitted.

[0266] In one embodiment, in the case that the target information includes the target RRC signaling, the target RRC signaling includes size information of the data to be transmitted of the SCG.

[0267] The size of the data to be transmitted of the SCG is in any one of per-DRB, per-LC, per-LCG, or per-SCG.

[0268] Optionally, the target RRC signaling can include any one of DRB information, LC information, LCG information, and indication information of the SCG having data to be transmitted, while including the size information of the data to be transmitted of the SCG.

[0269] The network device receives the target RRC signaling, reads the size information of the data to be transmitted of the SCG in the target RRC signaling, or reads the size information of the data to be transmitted of the SCG and any one of the DRB information, LC information, LCG information, and indication information of the SCG having data to be transmitted in the target RRC signaling, and can determine the specific size information of the data to be transmitted of the SCG.

[0270] The method for transmitting buffer data state information of a secondary cell group provided in the embodiments of the present application can realize the function of indicating the buffer data state information of the SCG side by the terminal by performing corresponding setting on the related information (DRB identifier information, logical channel identifier information, logical channel group identifier information, indication information that the SCG has data to be transmitted, and size information of the data to be transmitted of the SCG, etc.) of the RRC signaling, and can realize low-cost and high-efficiency modification of the existing network.

[0271] In one embodiment, the method for transmitting buffer data state information of a secondary cell group provided in the embodiments of the present application can further include:

[0272] According to the target information, at least one of the following is performed:

[0273] Reconfiguring a target bearer for the MCG and / or the SCG;

[0274] Activating the SCG;

[0275] The target bearer is used to transmit data corresponding to the buffer data state information of the SCG.

[0276] It can be understood that after the network device reads the target information, it can be determined that the current SCG has data to be transmitted.

[0277] Therefore, the network device can reconfigure the target bearer for the MCG, so as to transmit data corresponding to the buffer data state information of the SCG to the network device through the target bearer. Alternatively,

[0278] The network device can reconfigure the target bearer for the SCG, so as to transmit data corresponding to the buffer data state information of the SCG to the network device through the target bearer. Alternatively,

[0279] The network device can reconfigure the target bearer for the MCG and the SCG at the same time, so as to transmit data corresponding to the buffer data state information of the SCG to the network device through the target bearer. Alternatively,

[0280] The network device can activate the SCG, so as to make the SCG switch from the deactivated state to the activated state, and thus transmit data corresponding to the buffer data state information of the SCG to the network device.

[0281] In the method for transmitting buffer data state information of a secondary cell group provided in the embodiments of the present application, after the network device determines that the SCG has data to be transmitted according to the target information, it can reconfigure a target bearer for the MCG and / or the SCG, or activate the SCG, so as to transmit data corresponding to the buffer data state information of the SCG to the network device, which can ensure the smooth communication and improve the communication efficiency.

[0282] Figure 5Figure 02 is a flowchart of a method for transmitting buffer data state information of a secondary cell group according to an embodiment of the present application. Referring to Figure 02, the method comprises the following steps. Figure 5 The method for transmitting buffer data state information of a secondary cell group according to an embodiment of the present application can comprise the following steps.

[0283] Step 510: determining whether the SCG is in a deactivated state.

[0284] Step 520: sending target information to the network device through the MCG; the target information is used to indicate the buffer data state information of the SCG.

[0285] The target information can comprise at least one of the following:

[0286] a target BSR;

[0287] target signaling.

[0288] It should be noted that the execution subject of the method for transmitting buffer data state information of a secondary cell group according to an embodiment of the present application can be a terminal, such as a mobile phone, a computer, etc.

[0289] In a scenario where uplink data of the terminal arrives at an RLC bearer of the SCG, the terminal determines whether the SCG is in a deactivated state. If so, the terminal sends target information to the network device through the MCG.

[0290] After receiving the target information sent by the terminal through the MCG, the network device parses the target information to obtain the buffer data state information of the SCG included in the target information, so as to determine that the SCG has uplink data to be reported at this time, and thus performs corresponding operations to make the uplink data of the SCG reported to the network device.

[0291] The target information can comprise a target BSR and target RRC signaling. The target BSR can refer to a BSR sent by the terminal to the network device through the MCG, and the target RRC can refer to an RRC sent by the terminal to the network device through the MCG.

[0292] The method for transmitting buffer data state information of a secondary cell group according to an embodiment of the present application enables the network device to receive target information containing buffer data state information of the SCG sent by the terminal through the MCG when the SCG is in a deactivated state, thereby realizing the function of the terminal indicating the buffer data state information of the SCG, and enabling the network device to make decisions and perform corresponding operations to make the uplink data of the SCG reported smoothly according to the buffer data state information of the SCG reported by the terminal when the SCG is in a deactivated state, thereby significantly improving the stability and efficiency of communication compared with the prior art.

[0293] In one embodiment, in case that the target information comprises a target BSR, the LCID in the MAC subPDU header where the BSR MAC CE corresponding to the target BSR locates can comprise:

[0294] The predetermined Codepoint and / or Index parameter value corresponds to a target LCID value, and the target LCID value corresponds to a format of the BSR of the SCG.

[0295] The format of the BSR of the SCG comprises one or more of a short format, a long format, a short truncated format and a long truncated format.

[0296] It should be noted that the predetermined Codepoint and / or Index parameter value can be a reserved Codepoint and / or Index parameter value in the LCID, or a reserved Codepoint and / or Index parameter value in the eLCID, or a preset Codepoint and / or Index parameter value other than the above two.

[0297] For example, the predetermined Codepoint and / or Index parameter value can be a reserved Codepoint and / or Index parameter value of 35 to 44 in the LCID, or a reserved Codepoint parameter value of 0 to 249 and / or a reserved Index parameter value of 64 to 313 in the eLCID, or a reserved Codepoint parameter value of 0 to (2 16 -1) in the eLCID and / or a reserved Index parameter value of 320 to (2 16 +319).

[0298] It should be noted that the Codepoint parameter and the Index parameter value can be the same or different, for example, the Codepoint parameter and the Index parameter in the LCID are the same, and the Codepoint parameter and the Index parameter in the eLCID are different.

[0299] For example:

[0300] 1a, any four of the reserved Codepoint and / or Index parameter of 35 to 44 correspond to four target LCID values respectively, and the four target LCID values correspond to the short format of the BSR of the SCG, the long format of the BSR of the SCG, the short truncated format of the BSR of the SCG and the long truncated format of the BSR of the SCG respectively.

[0301] For example, index 35 can be used to represent a first target LCID value corresponding to a short truncated format BSR for SCG, index 36 can be used to represent a second target LCID value corresponding to a long truncated format BSR for SCG, index 37 can be used to represent a third target LCID value corresponding to a short format BSR for SCG, and index 38 can be used to represent a fourth target LCID value corresponding to a long format BSR for SCG.

[0302] When the value of the LCID corresponds to index 35, the network device can determine, after receiving the target BSR, that the target BSR is a short truncated format BSR for SCG. Then, the network device can read information in the target BSR to learn which LCGs have data to be transmitted, and thus determine which SCG bearers have data to be transmitted.

[0303] 1b. Any four of the reserved 0 to 249 Codepoint parameters and / or 64 to 313 Index parameters correspond to four target LCID values, respectively, corresponding to a short format BSR, a long format BSR, a short truncated format BSR, and a long truncated format BSR for SCG, respectively.

[0304] For example, index 65 can be used to represent a first target LCID value corresponding to a short truncated format BSR for SCG, index 66 can be used to represent a second target LCID value corresponding to a long truncated format BSR for SCG, index 67 can be used to represent a third target LCID value corresponding to a short format BSR for SCG, and index 68 can be used to represent a fourth target LCID value corresponding to a long format BSR for SCG.

[0305] When the value of the LCID corresponds to index 65, the network device can determine, after receiving the target BSR, that the target BSR is a short truncated format BSR for SCG. Then, the network device can read information in the target BSR to learn which LCGs have data to be transmitted, and thus determine which SCG bearers have data to be transmitted.

[0306] 1c. The four preset Codepoint and / or Index parameter values correspond to four target LCID values, respectively, corresponding to a short format BSR, a long format BSR, a short truncated format BSR, and a long truncated format BSR for SCG, respectively.

[0307] For example, the first preset Codepoint and / or Index parameter value can be used to represent the first target LCID value corresponding to the short truncated format of the BSR of the SCG, the second preset Codepoint and / or Index parameter value can be used to represent the second target LCID value corresponding to the long truncated format of the BSR of the SCG, the third preset Codepoint and / or Index parameter value can be used to represent the third target LCID value corresponding to the short format of the BSR of the SCG, and the fourth preset Codepoint and / or Index parameter value can be used to represent the fourth target LCID value corresponding to the long format of the BSR of the SCG.

[0308] When the value of the LCID corresponds to the first preset Codepoint and / or Index parameter value, the network device can determine, after receiving the target BSR, that the target BSR is the short truncated format of the BSR of the SCG. Then, the network device can read the information in the target BSR to know which LCGs have data to be transmitted, so as to determine which SCGs carry data to be transmitted.

[0309] 2a, any two of the reserved Codepoints and / or Index parameters from 35 to 44 correspond to two target LCID values respectively, and the two target LCID values can correspond to any two formats of the BSR of the SCG. For example, the two target LCID values correspond to the short format of the BSR of the SCG and the long format of the BSR of the SCG respectively.

[0310] Specifically, the index 35 can be used to represent the first target LCID value corresponding to the short format of the BSR of the SCG, and the index 36 can be used to represent the second target LCID value corresponding to the long format of the BSR of the SCG.

[0311] When the value of the LCID corresponds to the index 35, the network device can determine, after receiving the target BSR, that the target BSR is the short format of the BSR of the SCG. Then, the network device can read the information in the target BSR to know which LCGs have data to be transmitted, so as to determine which SCGs carry data to be transmitted.

[0312] 2b, any two of the reserved Codepoint parameters from 0 to 249 and / or the Index parameters from 64 to 313 correspond to two target LCID values respectively, and the two target LCID values can correspond to any two formats of the BSR of the SCG. For example, the two target LCID values correspond to the short format of the BSR of the SCG and the long format of the BSR of the SCG respectively.

[0313] Specifically, the index 65 can be used to represent a first target LCID value corresponding to a short format of BSR of SCG, and the index 66 can be used to represent a second target LCID value corresponding to a long format of BSR of SCG.

[0314] When the value of LCID corresponds to the index 65, the network device can determine that the target BSR is a short format of BSR of SCG after receiving the target BSR. Then, the network device can read the information in the target BSR to know which LCGs have data to be transmitted, so as to determine which SCG bear data to be transmitted.

[0315] 2c, two preset Codepoint and / or Index parameter values correspond to two target LCID values, and the two target LCID values can correspond to any two formats of BSR of SCG. For example, the two target LCID values correspond to a short format of BSR of SCG and a long format of BSR of SCG respectively.

[0316] For example, a first preset Codepoint and / or Index parameter value can be used to represent a first target LCID value corresponding to a short format of BSR of SCG, and a second preset Codepoint and / or Index parameter value can be used to represent a second target LCID value corresponding to a long format of BSR of SCG.

[0317] When the value of LCID corresponds to the first preset Codepoint and / or Index parameter value, the network device can determine that the target BSR is a short format of BSR of SCG after receiving the target BSR. Then, the network device can read the information in the target BSR to know which LCGs have data to be transmitted, so as to determine which SCG bear data to be transmitted.

[0318] 3a, any one of the reserved Codepoint and / or Index parameter values from 35 to 44 corresponds to a target LCID value, and the target LCID value can be any one of four formats of BSR of SCG. For example, the short format of BSR of SCG is defined as 0, the long format of BSR of SCG is defined as 1, the short truncated format of BSR of SCG is defined as 2, and the long truncated format of BSR of SCG is defined as 3. Any one of the target LCID values is marked as 3, indicating that the target LCID value corresponds to the long truncated format of BSR of SCG; any one of the target LCID values is marked as 0, indicating that the target LCID value corresponds to the short format of BSR of SCG; and so on.

[0319] For example, the index 37 can be used to represent a target LCID value, and the target LCID value is assumed to be 3.

[0320] When the value of the LCID corresponds to the index 37, the network device can determine that the target BSR is a long truncated format BSR of the SCG after receiving the target BSR. Then, the network device reads the information in the target BSR to know which LCGs have data to be transmitted, thereby determining which SCG bearers have data to be transmitted.

[0321] 3b, any one of the reserved 0 to 249 Codepoint parameters and / or 64 to 313 Index parameters corresponds to one target LCID value, and the one target LCID value can be any one of the four formats of the BSR of the SCG. For example, the BSR of the short format of the SCG is defined as 0, the BSR of the long format is defined as 1, the BSR of the short truncated format is defined as 2, and the BSR of the long truncated format is defined as 3. Any one of the target LCID values is marked as 3, indicating that the target LCID value corresponds to the BSR of the long truncated format of the SCG; any one of the target LCID values is marked as 0, indicating that the target LCID value corresponds to the BSR of the short format of the SCG; and so on.

[0322] For example, the index 37 or the index 67 can be used to represent the target LCID value. Assuming that the target LCID value is 3, the target LCID value corresponds to the BSR of the long truncated format of the SCG.

[0323] When the value of the LCID corresponds to the index 37 or the index 67, the network device can determine that the target BSR is a long truncated format BSR of the SCG after receiving the target BSR. Then, the network device reads the information in the target BSR to know which LCGs have data to be transmitted, thereby determining which SCG bearers have data to be transmitted.

[0324] 3c, one Codepoint and / or Index parameter value corresponds to one target LCID value, and the one target LCID value can be any one of the four formats of the BSR of the SCG. For example, the BSR of the short format of the SCG is defined as 0, the BSR of the long format is defined as 1, the BSR of the short truncated format is defined as 2, and the BSR of the long truncated format is defined as 3. Any one of the target LCID values is marked as 3, indicating that the target LCID value corresponds to the BSR of the long truncated format of the SCG; any one of the target LCID values is marked as 0, indicating that the target LCID value corresponds to the BSR of the short format of the SCG; and so on.

[0325] When the value of the LCID corresponds to the preset Codepoint and / or Index parameter value, the network device can determine the format of the target BSR according to the preset Codepoint and / or Index parameter value after receiving the target BSR. Then, the network device can read the information in the target BSR to know which LCGs have data to be transmitted, so as to determine which SCG bearers have data to be transmitted.

[0326] In one embodiment, when the target information includes a target BSR, the LCID corresponding to the target BSR can include:

[0327] The predetermined Codepoint and / or Index parameter value corresponds to the target LCID value, the target LCID value corresponds to the predetermined format of the BSR of the SCG, and the BSR MAC CE corresponding to the predetermined format of the BSR can include at least one of the following:

[0328] 1. SCG index, indicating which SCG the target BSR is for;

[0329] 2. LCG bitmap, indicating the LCG bitmap of the SCG having data to be transmitted, wherein 1 bit represents one LCG;

[0330] 3. LCG ID, indicating the LCG ID of the SCG having data to be transmitted;

[0331] 4. LCID, indicating the LCID of the SCG having data to be transmitted;

[0332] 5. LCID bitmap, indicating the LCID bitmap of the SCG having data to be transmitted, wherein 1 bit represents one LC;

[0333] 6. LCID index bitmap; wherein the LCID index is used to identify the corresponding LCID, for example, the SCG only has LCID / drbID 5 / 6 / 7 / 8 / 9 / 31 associated with a DRB (Data Radio Bearer) or an uplink transmission RLC bearer, then the index is sorted and coded according to a preset order, for example, the order of LCID size, index=0 corresponds to LCID 5, index=1 corresponds to LCID 6, index=2 corresponds to LCID 7, index=3 corresponds to LCID 8, index=4 corresponds to LCID 9, and index=5 corresponds to LCID 31, that is, the first 6 bits of the 8-bit bitmap respectively represent LCID 5 / 6 / 7 / 8 / 9 / 31, and the last 2 bits can be empty or 0, and the following corresponds to the buffer size of each LCID having data to be transmitted in order.

[0334] 7. LCID index; wherein the LCID index is used to identify the corresponding LCID, for example, if the SCG has only LCIDs / drbIDs 5 / 6 / 7 / 8 / 9 / 31 associated with DRBs or associated with uplink transmission RLC bearers, then the LCIDs are sorted and encoded in a preset order, for example, the order of LCID size, then index=0 corresponds to LCID 5, index=1 corresponds to LCID 6, index=2 corresponds to LCID 7, index=3 corresponds to LCID 8, index=4 corresponds to LCID 9, and index=5 corresponds to LCID 31, and the indexes 0, 1, 2, 3, 4, and 5 are recorded.

[0335] 8. LCID bitmap length indication information; wherein the indication information indicates the length of the LCID bitmap, for example, indicating that the length of the LCID bitmap can be 8 bits, 16 bits, 32 bits, etc. The LCs associated with DRBs or associated with uplink transmission RLC bearers are included in sequence, and the number of redundant bits is set to 0.

[0336] 9. LCID index length indication information; wherein the indication information indicates the length of the LCID index, for example, indicating that the length of the LCID index can be 3 bits, 4 bits, 5 bits, etc. The logical channels associated with DRBs or associated with uplink transmission RLC bearers are included in sequence, and the number of redundant bits is set to 0.

[0337] 10. Buffer data information, indicating the amount of buffer data; wherein the amount of buffer data can be in units of per LCG or in units of per LC.

[0338] 11. Indication information of whether there is an unreported BSR, used to indicate whether there is an SCG unreported BSR at present.

[0339] For example, index 66 can be used to represent a target LCID value, and the target LCID value corresponds to a predetermined format of BSR of the SCG.

[0340] When the value of the LCID corresponds to index 66, after the network device receives the target BSR, it can be determined that the target BSR is a BSR of a predetermined format of the SCG. Then, the network device reads the information in the target BSR to obtain the SCG index, LCG, LC, buffer data, etc., so as to determine which SCG bearers have data to be transmitted.

[0341] In one embodiment, in the case that the target information includes a target BSR, the reserved bits of the MAC subheader corresponding to the target BSR include any one of the following:

[0342] 1、In the case that the MAC subheader includes one reserved bit, the reserved bit indicates whether the target BSR is the BSR of SCG or not;

[0343] For example, when the reserved bit R of the MAC subheader of the MAC sub PDU where the BSR MAC CE is located is 1, it can indicate that the target BSR is the BSR of SCG; when the reserved bit R is 0, it can indicate that the target BSR is not the BSR of SCG. Or,

[0344] When the reserved bit R is 0, it can indicate that the target BSR is the BSR of SCG; when the reserved bit R is 1, it can indicate that the target BSR is not the BSR of SCG.

[0345] After receiving the target BSR, the network device can determine whether the target BSR is the BSR of SCG or not according to the value of the reserved bit of the MAC subheader corresponding to the target BSR. Then the network device will read the information in the target BSR to know which LCG has data to be transmitted, so as to determine which SCG carries data to be transmitted.

[0346] 2、In the case that the MAC subheader includes two reserved bits, any one of the two reserved bits indicates whether the target BSR is the BSR of SCG or not;

[0347] For example, when the first reserved bit R indicating the BSR of SCG in the MAC subheader of the MAC sub PDU where the BSR MAC CE is located is 1, it can indicate that the target BSR is the BSR of SCG; when the first reserved bit R is 0, it can indicate that the target BSR is not the BSR of SCG. Or,

[0348] When the first reserved bit R is 0, it can indicate that the target BSR is the BSR of SCG; when the first reserved bit R is 1, it can indicate that the target BSR is not the BSR of SCG.

[0349] After receiving the target BSR, the network device can determine whether the target BSR is the BSR of SCG or not according to the value of the first reserved bit of the MAC subheader corresponding to the target BSR. Then the network device will read the information in the target BSR to know which LCG has data to be transmitted, so as to determine which SCG carries data to be transmitted.

[0350] 3、In the case that the MAC subheader includes two reserved bits, one of the two reserved bits indicates whether the target BSR is the BSR of SCG or not, and the other indicates whether the target BSR is the BSR of MCG or not;

[0351] In this case, the MAC subheader corresponding to the target BSR can include any one of the following:

[0352] one target LCID, used to indicate the format of the BSR of the SCG and / or the format of the BSR of the MCG;

[0353] two target LCIDs, respectively used to indicate the format of the BSR of the SCG and the format of the BSR of the MCG.

[0354] For example, when the first reserved bit R in the MAC subheader of the MAC subPDU where the BSR MAC CE is located is 1, indicating the BSR of the SCG, and the second reserved bit R is also 1, indicating the BSR of the MCG, it can be indicated that the target BSR includes both the BSR of the SCG and the BSR of the MCG; if at this time the MAC subheader only includes one target LCID indicating a long BSR, it indicates that both the BSR of the SCG and the BSR of the MCG are long BSRs.

[0355] For example, when the first reserved bit R in the MAC subheader of the MAC subPDU where the BSR MAC CE is located is 1, indicating the BSR of the SCG, and the second reserved bit R is also 1, indicating the BSR of the MCG, it can be indicated that the target BSR includes both the BSR of the SCG and the BSR of the MCG; if at this time the MAC subheader includes two target LCIDs respectively indicating that the BSR of the SCG is a long BSR and the BSR of the MCG is a short BSR, at this time the BSR of the SCG is a long BSR and the BSR of the MCG is a short BSR.

[0356] After receiving the target BSR, the network device can determine whether the target BSR is the BSR of the SCG and / or the BSR of the MCG through the values of the first reserved bit and the second reserved bit of the MAC subheader corresponding to the target BSR. Then the network device will read the information in the target BSR to know which LCGs have data to be transmitted, so as to determine which SCG bearers have data to be transmitted.

[0357] 4. In the case where the MAC subheader includes two reserved bits, the two reserved bits indicate the SCG index; the SCG index is used to indicate which BSR of the target BSR is the BSR of which SCG;

[0358] For example, when the values of the two reserved bits R in the MAC subheader of the MAC subPDU where the BSR MAC CE is located are 01, it can be indicated that the target BSR is the BSR of the SCG with index = 01.

[0359] After receiving the target BSR, the network device can determine which BSR of the target BSR is the BSR of which SCG through the values of the two reserved bits of the MAC subheader corresponding to the target BSR. Then the network device will read the information in the target BSR to know which LCGs have data to be transmitted, so as to determine which SCG bearers have data to be transmitted.

[0360] The format of the target BSR is any one of a short format, a long format, a short truncated format, a long truncated format, and a predetermined format.

[0361] The method for transmitting buffer data state information of a secondary cell group provided by the embodiments of the present application can realize the function of indicating the buffer data state information of the SCG side by the terminal by corresponding setting of the related information (LCID, eLCID, and reserved bits, etc.) of the BSR, and can realize low-cost and efficient modification of the existing network.

[0362] In one embodiment, in the case that the target information includes target RRC signaling, the target RRC signaling includes DRB identification information of the SCG having data to be transmitted, and the DRB identification information is indicated by a bitmap; wherein the bitmap includes any one of the following:

[0363] 1. ID of all MCGs and ID of all SCGs;

[0364] After the network device receives the target RRC signaling, the network device can determine which DRB has data to be transmitted by reading the bitmap of all DRBs in the target RRC signaling.

[0365] 2. DRB ID of the SCG having RLC bearer;

[0366] After the network device receives the target RRC signaling, the network device can determine which DRB has data to be transmitted by reading the bitmap of the DRB ID of the SCG having RLC bearer in the target RRC signaling.

[0367] 3. DRB ID of the SCG having RLC bearer, and the RLC bearer does not belong to a split bearer;

[0368] After the network device receives the target RRC signaling, the network device can determine which DRB has data to be transmitted by reading the bitmap of the DRB ID of the SCG having RLC bearer but not belonging to a split bearer in the target RRC signaling.

[0369] 4. DRB ID of the SCG having RLC bearer, and in the case that the RLC bearer is a split bearer, the RLC bearer only includes a split bearer of the master path in the SCG.

[0370] After the network device receives the target RRC signaling, the network device can determine which DRB has data to be transmitted by reading the bitmap of the DRB ID of the SCG having RLC bearer and in the case that the RLC bearer is a split bearer, the RLC bearer only includes a split bearer of the master path in the SCG.

[0371] In one embodiment, in the case that the target information comprises target RRC signaling, the target RRC signaling comprises a DRB ID of the SCG having data to be transmitted, and the DRB ID is any of the following:

[0372] 1. a DRB ID of an RLC bearer in the SCG, which can be in the form of a DRB ID list, etc.

[0373] After the network device receives the target RRC signaling, it can determine which DRB has data to be transmitted by reading the DRB ID list information indicating the RLC bearer in the SCG.

[0374] 2. a DRB ID of an RLC bearer in the SCG, and the RLC bearer does not belong to a split bearer, which can be in the form of a DRB ID list, etc.

[0375] After the network device receives the target RRC signaling, it can determine which DRB has data to be transmitted by reading the DRB ID list information indicating the RLC bearer in the SCG and the RLC bearer does not belong to a split bearer.

[0376] 3. a DRB ID of an RLC bearer in the SCG, and in the case that the RLC bearer is a split bearer, the RLC bearer only includes a split bearer of the master path in the SCG, which can be in the form of a DRB ID list, etc.

[0377] After the network device receives the target RRC signaling, it can determine which DRB has data to be transmitted by reading the DRB ID list information indicating the RLC bearer in the SCG and in the case that the RLC bearer is a split bearer, the RLC bearer only includes a split bearer of the master path in the SCG.

[0378] In one embodiment, in the case that the target information comprises target RRC signaling, the target RRC signaling comprises logical channel identification information of the SCG having data to be transmitted, which is represented by a bitmap or an LCID list.

[0379] The logical channel identification information satisfies any of the following:

[0380] 1. the logical channel identification information comprises a bearer, and in the case that the bearer is a split bearer, the bearer only includes a split bearer of the master path in the SCG.

[0381] The network device receives the target RRC signaling, reads the bitmap information or LCID list indicating the logical channel identification information including the bearer in the target RRC signaling, and determines which LCs have data to be transmitted, and thus determines which DRBs have data to be transmitted, in the case that the bearer is not a separated bearer.

[0382] 2. The logical channel identification information includes the bearer, and the bearer is not a separated bearer.

[0383] The network device receives the target RRC signaling, reads the bitmap information or LCID list indicating the logical channel identification information including the bearer in the target RRC signaling, and determines which LCs have data to be transmitted, and thus determines which DRBs have data to be transmitted, in the case that the bearer is not a separated bearer.

[0384] 3. The logical channel identification information includes the bearer, and the bearer is not a separated bearer of the master path in the MCG.

[0385] The network device receives the target RRC signaling, reads the bitmap information or LCID list indicating the logical channel identification information including the bearer in the target RRC signaling, and determines which LCs have data to be transmitted, and thus determines which DRBs have data to be transmitted, in the case that the bearer is not a separated bearer of the master path in the MCG.

[0386] In one embodiment, in the case that the target information includes the target RRC signaling, the target RRC signaling includes logical channel group identification information indicating that the SCG has data to be transmitted, and the logical channel group identification information is indicated by a bitmap or by an LCG ID list.

[0387] The network device receives the target RRC signaling, reads the bitmap information or LCID list indicating the logical channel group identification information indicating that the SCG has data to be transmitted in the target RRC signaling, and determines which LCGs have data to be transmitted, and thus determines which DRBs have data to be transmitted.

[0388] In one embodiment, in the case that the target information includes the target RRC signaling, the target RRC signaling includes indication information indicating that the SCG has data to be transmitted.

[0389] The network device receives the target RRC signaling, reads the indication information indicating that the SCG has data to be transmitted in the target RRC signaling, and determines that the SCG has data to be transmitted.

[0390] In one embodiment, in the case that the target information includes the target RRC signaling, the target RRC signaling includes size information of the data to be transmitted by the SCG.

[0391] The size of the data to be transmitted of the SCG is in any one of units of per DRB, per LC, per LCG, and per SCG.

[0392] Optionally, the target RRC signaling can include any one of DRB information, LC information, LCG information, and indication information that the SCG has data to be transmitted, while including the size information of the data to be transmitted of the SCG.

[0393] After the network device receives the target RRC signaling, the specific size information of the data to be transmitted of the SCG can be determined by reading the size information of the data to be transmitted of the SCG in the target RRC signaling, or reading any one of the size information of the data to be transmitted of the SCG and the DRB information, the LC information, the LCG information, and the indication information that the SCG has data to be transmitted.

[0394] The method for transmitting the buffer data state information of the secondary cell group provided by the embodiments of the present application can realize the function of the terminal indicating the buffer data state information of the SCG side by corresponding setting of the related information (DRB identification information, logical channel identification information, logical channel group identification information, indication information that the SCG has data to be transmitted, and size information of the data to be transmitted of the SCG) of the RRC signaling, and can realize low-cost and high-efficiency modification of the existing network.

[0395] The technical solutions provided by the embodiments of the present application can be applied to various systems, especially 5G systems. For example, the applicable systems can be global system of mobile communication (GSM) systems, code division multiple access (CDMA) systems, wideband code division multiple access (WCDMA) general packet radio service (GPRS) systems, long term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, long term evolution advanced (LTE-A) systems, universal mobile system (UMTS), worldwide interoperability for microwave access (WiMAX) systems, 5G new radio (NR) systems, and the like. Among these various systems, there are terminal devices and network devices. The system can also include a core network part, such as an evolved packet system (EPS), a 5G system (5GS), and the like.

[0396] The terminal device to which the embodiments of the present application relate can refer to a device that provides voice and / or data connectivity to a user, a handheld device having a wireless connection function, or other processing devices connected to a wireless modem, etc. In different systems, the name of the terminal device can also be different, for example, in the 5G system, the terminal device can be called user equipment (User Equipment, UE). The wireless terminal device can communicate with one or more core networks (Core Network, CN) through a radio access network (Radio Access Network, RAN). The wireless terminal device can be a mobile terminal device, such as a mobile phone (also known as a "cellular" phone) and a computer with a mobile terminal device, for example, it can be a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device that exchanges language and / or data with a radio access network. For example, personal communication service (Personal Communication Service, PCS) phones, cordless phones, session initiation protocol (Session Initiated Protocol, SIP) phones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital assistants (Personal Digital Assistant, PDA) and the like. The wireless terminal device can also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile, a remote station, an access point, a remote terminal, an access terminal, a user terminal, a user agent, a user device, which is not limited in the embodiments of the present application.

[0397] The network device related to the embodiments of the present application can be a base station, which can include multiple cells serving terminals. According to different application scenarios, the base station can also be referred to as an access point, or can be a device in an access network that communicates with wireless terminal devices through one or more sectors over an air interface, or other names. The network device can be used to exchange received air frames and Internet Protocol (IP) packets as a router between wireless terminal devices and the rest of the access network, which can include an Internet Protocol (IP) communication network. The network device can also coordinate the management of the properties of the air interface. For example, the network device related to the embodiments of the present application can be a network device (Base Transceiver Station, BTS) in the Global System for Mobile Communications (GSM) or Code Division Multiple Access (CDMA), or a network device (NodeB) in Wide-band Code Division Multiple Access (WCDMA), or an evolved network device (evolutional Node B, eNB or e-NodeB) in a long term evolution (LTE) system, or a 5G base station (gNB) in a next generation system, or a Home evolved Node B (HeNB), a relay node, a femto, a pico, etc., which are not limited in the embodiments of the present application. In some network structures, the network device can include a centralized unit (CU) node and a distributed unit (DU) node, and the centralized unit and the distributed unit can also be geographically separated.

[0398] Network devices and terminal devices can each use one or more antennas for multiple-input multiple-output (MIMO) transmission. MIMO transmission can be single-user MIMO (SU-MIMO) or multiple-user MIMO (MU-MIMO). Depending on the configuration and number of antenna combinations, MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO, or massive-MIMO, and can also be diversity transmission, precoding transmission, or beamforming transmission, etc.

[0399] Figure 6 This is a schematic diagram of a network device according to an embodiment of this application. (Refer to...) Figure 6 This application provides a network device, which may include: a memory 610, a transceiver 620, and a processor 630.

[0400] The memory 610 is used to store computer programs; the transceiver 620 is used to send and receive data under the control of the processor 630; the processor 630 is used to read the computer program in the memory 610 and perform the following operations:

[0401] When the secondary cell group (SCG) is in a deactivated state, the receiving terminal sends target information through the primary cell group (MCG); the target information is used to indicate the buffer data status information of the SCG.

[0402] The target information includes at least one of the following:

[0403] Target Buffer Status Report (BSR);

[0404] Target Radio Resource Control (RRC) signaling.

[0405] Among them, Figure 6 In this context, the bus architecture can include any number of interconnected buses and bridges, specifically linking various circuits together, represented by one or more processors (processor 630) and memory (memory 610). The bus architecture can also link various other circuits, such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides an interface. The transceiver 620 can be multiple elements, including transmitters and receivers, providing a unit for communicating with various other devices over transmission media, including wireless channels, wired channels, optical fibers, etc. The processor 630 is responsible for managing the bus architecture and general processing, and the memory 610 can store data used by the processor 630 during operation.

[0406] The processor 630 can be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or a complex programmable logic device (CPLD), and can also be implemented by a multi-core architecture.

[0407] The processor 630 is configured to execute any of the methods provided by the embodiments of the present application by invoking computer programs stored in the memory 610. The processor 630 and the memory 610 can also be physically arranged separately.

[0408] In one embodiment, when the target information includes the target BSR, a logical channel ID LCID corresponding to the target BSR includes:

[0409] The predetermined Codepoint and / or Index parameter value corresponds to a target LCID value, and the target LCID value corresponds to a format of a BSR of the SCG.

[0410] One target LCID value corresponds to one format of a BSR of the SCG. The format of the BSR of the SCG includes any one of a short format, a long format, a short truncated format and a long truncated format.

[0411] In one embodiment, when the target information includes the target BSR, a LCID corresponding to the target BSR includes:

[0412] The predetermined Codepoint and / or Index parameter value corresponds to a target LCID value, and the target LCID value corresponds to a BSR of a predetermined format of the SCG.

[0413] The BSR medium access control (MAC) control element (CE) corresponding to the BSR of the predetermined format of the SCG includes at least one of:

[0414] An SCG index;

[0415] A logical channel group (LCG) bitmap;

[0416] An LCG ID;

[0417] An LCID;

[0418] An LCID bitmap;

[0419] An LCID index bitmap;

[0420] LCID index;

[0421] LCID bitmap length indication information;

[0422] LCID index length indication information;

[0423] Buffer data information;

[0424] Indication information of whether there is a non-reported BSR.

[0425] In one embodiment, in the case that the target information includes the target BSR, the reserved bit of the MAC subheader corresponding to the target BSR includes any one of the following:

[0426] In the case that the MAC subheader includes one reserved bit, the reserved bit indicates whether the target BSR is a BSR of the SCG;

[0427] In the case that the MAC subheader includes two reserved bits, any one of the two reserved bits indicates whether the target BSR is a BSR of the SCG;

[0428] In the case that the MAC subheader includes two reserved bits, one of the two reserved bits indicates whether the target BSR is a BSR of the SCG, and the other indicates whether the target BSR is a BSR of the MCG;

[0429] In the case that the MAC subheader includes two reserved bits, the two reserved bits indicate an SCG index; the SCG index is used to indicate which SCG the target BSR is a BSR of;

[0430] Wherein, the format of the target BSR is any one of a short format, a long format, a short truncated format, a long truncated format and a predetermined format.

[0431] In one embodiment, in the case that one of the two reserved bits indicates whether the target BSR is a BSR of the SCG, and the other indicates whether the target BSR is a BSR of the MCG, the MAC subheader corresponding to the target BSR includes any one of the following:

[0432] One target LCID is used to indicate the format of the BSR of the SCG and / or the format of the BSR of the MCG;

[0433] Two target LCIDs are respectively used to indicate the format of the BSR of the SCG and the format of the BSR of the MCG.

[0434] In an embodiment, in the case that the target information comprises the target RRC signaling, the target RRC signaling comprises DRB identification information of SCG data radio bearer (DRB) having data to be transmitted, and the DRB identification information is represented in the form of bitmap.

[0435] The bitmap comprises any of the following:

[0436] IDs of all MCGs and IDs of all SCG;

[0437] DRB IDs of SCG having radio link control (RLC) bearers;

[0438] DRB IDs of SCG having RLC bearers, and the RLC bearers do not belong to split bearers;

[0439] DRB IDs of SCG having RLC bearers, and in the case that the RLC bearers are split bearers, the RLC bearers only comprise split bearers of master paths in SCG.

[0440] In an embodiment, in the case that the target information comprises the target RRC signaling, the target RRC signaling comprises DRB IDs of SCG having data to be transmitted, and the DRB IDs are any of the following:

[0441] DRB IDs of SCG having RLC bearers;

[0442] DRB IDs of SCG having RLC bearers, and the RLC bearers do not belong to split bearers;

[0443] DRB IDs of SCG having RLC bearers, and in the case that the RLC bearers are split bearers, the RLC bearers only comprise split bearers of master paths in SCG.

[0444] In an embodiment, in the case that the target information comprises the target RRC signaling, the target RRC signaling comprises logical channel identification information of SCG having data to be transmitted, and the logical channel identification information is represented in the form of bitmap or in the form of LCID list.

[0445] The logical channel identification information satisfies any of the following:

[0446] The logical channel identification information comprises bearers, and in the case that the bearers are split bearers, the bearers only comprise split bearers of master paths in SCG;

[0447] The logical channel identification information comprises bearers, and the bearers do not belong to split bearers;

[0448] The logical channel identification information includes a bearer, and the bearer does not belong to a separated bearer of the master path in the MCG.

[0449] In one embodiment, in a case where the target information includes the target RRC signaling, the target RRC signaling includes logical channel group identification information of the SCG having data to be transmitted, the logical channel group identification information is represented in a bitmap manner or in a manner of a list of LCG IDs.

[0450] In one embodiment, in a case where the target information includes the target RRC signaling, the target RRC signaling includes indication information of the SCG having data to be transmitted.

[0451] In one embodiment, in a case where the target information includes the target RRC signaling, the target RRC signaling includes size information of data to be transmitted of the SCG.

[0452] The size of the data to be transmitted of the SCG is in any one of units of per-DRB, per-LC, per-LCG, and per-SCG.

[0453] In one embodiment, the processor 630 is further configured to:

[0454] According to the target information, at least one of the following is performed:

[0455] Reconfiguring target bearers for the MCG and / or the SCG;

[0456] Activating the SCG;

[0457] The target bearers are used to transmit data corresponding to the buffer data state information of the SCG.

[0458] Figure 7 A structural schematic diagram of a terminal according to an embodiment of the present application. Referring to Figure 7 The present embodiment provides a terminal, which can include a memory 710, a transceiver 720, and a processor 730.

[0459] The memory 710 is configured to store a computer program; the transceiver 720 is configured to transceive data under the control of the processor 730; and the processor 730 is configured to read the computer program in the memory 710 and perform the following operations:

[0460] Determining that a secondary cell group (SCG) is in a deactivated state;

[0461] Sending target information to a network device through a master cell group (MCG); the target information is used to indicate buffer data state information of the SCG;

[0462] The target information includes at least one of the following:

[0463] A target buffer status report (BSR);

[0464] A target radio resource control (RRC) signaling.

[0465] In the target information includes the target BSR, the logical channel ID (LCID) corresponding to the target BSR includes: Figure 7 In the target information includes the target BSR, the logical channel ID (LCID) corresponding to the target BSR includes:

[0466] The processor 730 is responsible for managing the bus architecture and general processing, and the memory 710 can store data used by the processor 730 in performing operations.

[0467] Optionally, the processor 730 can be a CPU (central processor), an ASIC (application specific integrated circuit), an FPGA (field programmable gate array) or a CPLD (complex programmable logic device), and the processor 730 can also adopt a multi-core architecture.

[0468] The processor 730 is responsible for managing the bus architecture and general processing, and the memory 710 can store data used by the processor 730 in performing operations.

[0469] In one embodiment, in the case that the target information includes the target BSR, the logical channel ID (LCID) corresponding to the target BSR includes:

[0470] The predetermined Codepoint and / or Index parameter value corresponds to a target LCID value, and the target LCID value corresponds to a format of a BSR of the SCG.

[0471] The format of the BSR of the SCG includes one or more of a short format, a long format, a short truncated format, and a long truncated format.

[0472] In one embodiment, in a case where the target information includes the target BSR, an LCID corresponding to the target BSR includes:

[0473] A predetermined Codepoint and / or Index parameter value corresponds to a target LCID value, which corresponds to a BSR of a predetermined format of the SCG;

[0474] The BSR of the predetermined format of the SCG corresponds to a BSR medium access control (MAC) control element (CE) including at least one of:

[0475] An SCG index;

[0476] A logical channel group (LCG) bitmap;

[0477] An LCG ID;

[0478] An LCID;

[0479] An LCID bitmap;

[0480] An LCID index bitmap;

[0481] An LCID index;

[0482] An LCID bitmap length indication information;

[0483] An LCID index length indication information;

[0484] Buffer data information;

[0485] Indication information of whether there is a non-reported BSR.

[0486] In one embodiment, in a case where the target information includes the target BSR, a reserved bit of a MAC subheader corresponding to the target BSR includes any one of:

[0487] In a case where the MAC subheader includes one reserved bit, the reserved bit indicates whether the target BSR is a BSR of the SCG;

[0488] In a case where the MAC subheader includes two reserved bits, any one of the two reserved bits indicates whether the target BSR is a BSR of the SCG;

[0489] In a case where the MAC subheader includes two reserved bits, one of the two reserved bits indicates whether the target BSR is a BSR of the SCG, and the other indicates whether the target BSR is a BSR of the MCG.

[0490] In a case where the MAC subheader includes two reserved bits, the two reserved bits indicate an SCG index, which indicates which SCG the target BSR is a BSR of.

[0491] The format of the target BSR is any one of a short format, a long format, a short truncated format, a long truncated format, and a predetermined format.

[0492] In a case where one of the two reserved bits indicates whether the target BSR is a BSR of the SCG, and the other indicates whether the target BSR is a BSR of the MCG, the MAC subheader corresponding to the target BSR includes any one of the following:

[0493] One target LCID, which indicates the format of the BSR of the SCG and / or the format of the BSR of the MCG.

[0494] Two target LCIDs, which respectively indicate the format of the BSR of the SCG and the format of the BSR of the MCG.

[0495] In a case where the target information includes the target RRC signaling, the target RRC signaling includes DRB identification information of the SCG having data to be transmitted, and the DRB identification information is indicated by a bitmap.

[0496] The bitmap includes any one of the following:

[0497] IDs of all MCGs and IDs of all SCGs;

[0498] DRB IDs of the SCG having radio link control (RLC) bearers;

[0499] DRB IDs of the SCG having RLC bearers, and the RLC bearers do not belong to split bearers.

[0500] DRB IDs of the SCG having RLC bearers, and in a case where the RLC bearers are split bearers, the RLC bearers only include split bearers in the SCG.

[0501] In an embodiment, in the case that the target information comprises the target RRC signaling, the target RRC signaling comprises a DRB ID of the SCG having data to be transmitted, and the DRB ID is any one of the following:

[0502] a DRB ID of an RLC bearer in the SCG;

[0503] a DRB ID of an RLC bearer in the SCG, and the RLC bearer does not belong to a split bearer;

[0504] a DRB ID of an RLC bearer in the SCG, and in the case that the RLC bearer is a split bearer, the RLC bearer only comprises a split bearer in the SCG of a master path.

[0505] In an embodiment, in the case that the target information comprises the target RRC signaling, the target RRC signaling comprises logical channel identification information of the SCG having data to be transmitted, and the logical channel identification information is represented in a bitmap manner or in a LCID list manner.

[0506] The logical channel identification information satisfies any one of the following:

[0507] The logical channel identification information comprises a bearer, and in the case that the bearer is a split bearer, the bearer only comprises a split bearer in the SCG of a master path.

[0508] The logical channel identification information comprises a bearer, and the bearer does not belong to a split bearer.

[0509] The logical channel identification information comprises a bearer, and the bearer does not belong to a split bearer in the MCG of a master path.

[0510] In an embodiment, in the case that the target information comprises the target RRC signaling, the target RRC signaling comprises logical channel group identification information of the SCG having data to be transmitted, and the logical channel group identification information is represented in a bitmap manner or in a LCG ID list manner.

[0511] In an embodiment, in the case that the target information comprises the target RRC signaling, the target RRC signaling comprises indication information of the SCG having data to be transmitted.

[0512] In an embodiment, in the case that the target information comprises the target RRC signaling, the target RRC signaling comprises size information of data to be transmitted of the SCG;

[0513] wherein the size of the data to be transmitted of the SCG is in any one of per-DRB, per-LC, per-LCG, or per-SCG.

[0514] Figure 8 Figure 1 is a schematic diagram of one of the structures of the buffer data state information transmission device of the secondary cell group provided by the embodiments of the present application. Referring to Figure 8 The buffer data state information transmission device of the secondary cell group provided by the embodiments of the present application can include:

[0515] The receiving module 810 is configured to receive target information sent by the terminal through the master cell group MCG in the case that the secondary cell group SCG is in a deactivated state; the target information is used to indicate buffer data state information of the SCG.

[0516] The target information includes at least one of the following:

[0517] Target buffer status report BSR;

[0518] Target radio resource control RRC signaling.

[0519] In one embodiment, in the case that the target information includes the target BSR, the logical channel ID LCID corresponding to the target BSR includes:

[0520] A target LCID value corresponding to a predetermined Codepoint and / or Index parameter value, the target LCID value corresponding to a format of the BSR of the SCG;

[0521] The format of the BSR of the SCG includes one or more of a short format, a long format, a short truncated format, and a long truncated format.

[0522] In one embodiment, in the case that the target information includes the target BSR, the LCID corresponding to the target BSR includes:

[0523] A target LCID value corresponding to a predetermined Codepoint and / or Index parameter value, the target LCID value corresponding to a BSR of a predetermined format of the SCG;

[0524] The BSR medium access control MAC control element CE corresponding to the BSR of the predetermined format of the SCG includes at least one of the following:

[0525] SCG index;

[0526] Logical channel group LCG bitmap;

[0527] LCG ID;

[0528] LCID;

[0529] LCID bitmap;

[0530] LCID index bitmap;

[0531] LCID index;

[0532] LCID bitmap length indication information;

[0533] LCID index length indication information;

[0534] Buffer data information;

[0535] Indication information of whether there is a non-reported BSR.

[0536] In one embodiment, in a case where the target information includes the target BSR, the reserved bit of the MAC subheader corresponding to the target BSR includes any one of the following:

[0537] In a case where the MAC subheader includes one reserved bit, the reserved bit indicates whether the target BSR is a BSR of the SCG;

[0538] In a case where the MAC subheader includes two reserved bits, any one of the two reserved bits indicates whether the target BSR is a BSR of the SCG;

[0539] In a case where the MAC subheader includes two reserved bits, one of the two reserved bits indicates whether the target BSR is a BSR of the SCG, and the other indicates whether the target BSR is a BSR of the MCG;

[0540] In a case where the MAC subheader includes two reserved bits, the two reserved bits indicate an SCG index; the SCG index is used to indicate which SCG the target BSR is a BSR of;

[0541] Wherein, the format of the target BSR is any one of a short format, a long format, a short truncated format, a long truncated format and a predetermined format.

[0542] In one embodiment, in a case where one of the two reserved bits indicates whether the target BSR is a BSR of the SCG, and the other indicates whether the target BSR is a BSR of the MCG, the MAC subheader corresponding to the target BSR includes any one of the following:

[0543] One target LCID is used to indicate the format of the BSR of the SCG and / or the format of the BSR of the MCG;

[0544] Two target LCIDs are respectively used to indicate the format of the BSR of the SCG and the format of the BSR of the MCG.

[0545] In an embodiment, in the case that the target information comprises the target RRC signaling, the target RRC signaling comprises DRB identification information of SCG data radio bearer (DRB) having data to be transmitted, and the DRB identification information is represented in the form of bitmap.

[0546] The bitmap comprises any of the following:

[0547] IDs of all MCGs and IDs of all SCGs;

[0548] DRB IDs of SCG having radio link control (RLC) bearers;

[0549] DRB IDs of SCG having RLC bearers, and the RLC bearers do not belong to split bearers;

[0550] DRB IDs of SCG having RLC bearers, and in the case that the RLC bearers are split bearers, the RLC bearers only comprise split bearers of master paths in SCG.

[0551] In an embodiment, in the case that the target information comprises the target RRC signaling, the target RRC signaling comprises DRB IDs of SCG having data to be transmitted, and the DRB IDs are any of the following:

[0552] DRB IDs of SCG having RLC bearers;

[0553] DRB IDs of SCG having RLC bearers, and the RLC bearers do not belong to split bearers;

[0554] DRB IDs of SCG having RLC bearers, and in the case that the RLC bearers are split bearers, the RLC bearers only comprise split bearers of master paths in SCG.

[0555] In an embodiment, in the case that the target information comprises the target RRC signaling, the target RRC signaling comprises logical channel identification information of SCG having data to be transmitted, and the logical channel identification information is represented in the form of bitmap or in the form of LCID list.

[0556] The logical channel identification information satisfies any of the following:

[0557] The logical channel identification information comprises bearers, and in the case that the bearers are split bearers, the bearers only comprise split bearers of master paths in SCG;

[0558] The logical channel identification information comprises bearers, and the bearers do not belong to split bearers;

[0559] The logical channel identification information includes a bearer, and the bearer does not belong to a separated bearer of the master path in the MCG.

[0560] In an embodiment, in a case where the target information includes the target RRC signaling, the target RRC signaling includes logical channel group identification information of the SCG having data to be transmitted, the logical channel group identification information is represented in a bitmap manner or in a manner of a list of LCG IDs.

[0561] In an embodiment, in a case where the target information includes the target RRC signaling, the target RRC signaling includes indication information of the SCG having data to be transmitted.

[0562] In an embodiment, in a case where the target information includes the target RRC signaling, the target RRC signaling includes size information of data to be transmitted of the SCG.

[0563] The size of the data to be transmitted of the SCG is in any one of units of per DRB, per LC, per LCG, and per SCG.

[0564] In an embodiment, the secondary cell group buffer data state information transmission apparatus provided by the embodiment of the present application can further include:

[0565] A processing module (not shown in the figure) is configured to:

[0566] According to the target information, at least one of the following is performed:

[0567] Reconfiguring target bearers for the MCG and / or the SCG;

[0568] Activating the SCG;

[0569] The target bearers are used to transmit data corresponding to the buffer data state information of the SCG.

[0570] Figure 9 FIG. 2 is a structural schematic diagram of a secondary cell group buffer data state information transmission apparatus provided by an embodiment of the present application. Referring to FIG. 2, Figure 9 The secondary cell group buffer data state information transmission apparatus provided by the embodiment of the present application can include:

[0571] A determining module 910 is configured to determine that a secondary cell group SCG is in a deactivated state.

[0572] A sending module 920 is configured to send target information to a network device through a master cell group MCG; the target information is used to indicate buffer data state information of the SCG.

[0573] wherein the target information comprises at least one of:

[0574] a target buffer status report (BSR);

[0575] a target radio resource control (RRC) signaling.

[0576] In one embodiment, in a case where the target information comprises the target BSR, a logical channel ID (LCID) corresponding to the target BSR comprises:

[0577] a predetermined Codepoint and / or Index parameter value corresponds to a target LCID value, the target LCID value corresponding to a format of a BSR of the SCG;

[0578] the format of the BSR of the SCG comprises one or more of a short format, a long format, a short truncated format, and a long truncated format.

[0579] In one embodiment, in a case where the target information comprises the target BSR, a LCID corresponding to the target BSR comprises:

[0580] a predetermined Codepoint and / or Index parameter value corresponds to a target LCID value, the target LCID value corresponding to a BSR of the SCG in a predetermined format;

[0581] wherein the BSR of the SCG in the predetermined format corresponds to a BSR medium access control (MAC) control element (CE) comprising at least one of:

[0582] an SCG index;

[0583] a logical channel group (LCG) bitmap;

[0584] an LCG ID;

[0585] an LCID;

[0586] an LCID bitmap;

[0587] an LCID index bitmap;

[0588] an LCID index;

[0589] an LCID bitmap length indication information;

[0590] an LCID index length indication information;

[0591] buffer data information;

[0592] an indication information of whether there is a non-reported BSR.

[0593] In one embodiment, in the case that the target information comprises the target BSR, the reserved bit of the MAC subheader corresponding to the target BSR comprises any one of the following:

[0594] In the case that the MAC subheader comprises one reserved bit, the reserved bit indicates whether the target BSR is a BSR of the SCG;

[0595] In the case that the MAC subheader comprises two reserved bits, any one of the two reserved bits indicates whether the target BSR is a BSR of the SCG;

[0596] In the case that the MAC subheader comprises two reserved bits, one of the two reserved bits indicates whether the target BSR is a BSR of the SCG, and the other indicates whether the target BSR is a BSR of the MCG;

[0597] In the case that the MAC subheader comprises two reserved bits, the two reserved bits indicate an SCG index; the SCG index is used to indicate which SCG the target BSR is a BSR of;

[0598] The format of the target BSR is any one of a short format, a long format, a short truncated format, a long truncated format, and a predetermined format.

[0599] In one embodiment, in the case that one of the two reserved bits indicates whether the target BSR is a BSR of the SCG, and the other indicates whether the target BSR is a BSR of the MCG, the MAC subheader corresponding to the target BSR comprises any one of the following:

[0600] One target LCID is used to indicate the format of the BSR of the SCG and / or the format of the BSR of the MCG;

[0601] Two target LCIDs are respectively used to indicate the format of the BSR of the SCG and the format of the BSR of the MCG.

[0602] In one embodiment, in the case that the target information comprises the target RRC signaling, the target RRC signaling comprises data radio bearer (DRB) identification information of the SCG having data to be transmitted, and the DRB identification information is indicated by a bitmap;

[0603] The bitmap comprises any one of the following:

[0604] IDs of all MCGs and IDs of all SCGs;

[0605] DRB ID of the SCG has an RLC bearer;

[0606] DRB ID of the SCG has an RLC bearer, and the RLC bearer does not belong to a split bearer;

[0607] DRB ID of the SCG has an RLC bearer, and in a case where the RLC bearer is a split bearer, the RLC bearer only includes a split bearer of a master path in the SCG.

[0608] In one embodiment, in a case where the target information includes the target RRC signaling, the target RRC signaling includes DRB ID of the SCG having data to be transmitted, and the DRB ID is any one of the following:

[0609] DRB ID of the SCG has an RLC bearer;

[0610] DRB ID of the SCG has an RLC bearer, and the RLC bearer does not belong to a split bearer;

[0611] DRB ID of the SCG has an RLC bearer, and in a case where the RLC bearer is a split bearer, the RLC bearer only includes a split bearer of a master path in the SCG.

[0612] In one embodiment, in a case where the target information includes the target RRC signaling, the target RRC signaling includes logical channel identification information of the SCG having data to be transmitted, and the logical channel identification information is represented in a bitmap manner or in an LCID list manner;

[0613] The logical channel identification information satisfies any one of the following:

[0614] The logical channel identification information includes a bearer, and in a case where the bearer is a split bearer, the bearer only includes a split bearer of a master path in the SCG;

[0615] The logical channel identification information includes a bearer, and the bearer does not belong to a split bearer;

[0616] The logical channel identification information includes a bearer, and the bearer does not belong to a split bearer of a master path in the MCG.

[0617] In one embodiment, in a case where the target information includes the target RRC signaling, the target RRC signaling includes logical channel group identification information of the SCG having data to be transmitted, and the logical channel group identification information is represented in a bitmap manner or in an LCG ID list manner.

[0618] In an embodiment, in a case that the target information comprises the target RRC signaling, the target RRC signaling comprises indication information of data to be transmitted by the SCG.

[0619] In an embodiment, in a case that the target information comprises the target RRC signaling, the target RRC signaling comprises size information of data to be transmitted by the SCG.

[0620] The size of the data to be transmitted by the SCG is in any one of units of per DRB, per LC, per LCG, and per SCG.

[0621] It should be noted that the above device provided by the embodiment of the present application can realize all the method steps realized by the method embodiments and achieve the same technical effects, and the same parts and beneficial effects in the embodiment as the method embodiments will not be described in detail.

[0622] It should be noted that the division of units in the embodiments of the present application is illustrative, and is only a logical function division. In actual implementation, another division mode can be used. In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0623] The integrated unit, if realized in the form of a software functional unit and sold or used as an independent product, can be stored in a processor-readable storage medium. Based on this understanding, the technical solutions of the present application, essentially or the part that contributes to the prior art, or all or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to perform all or part of the steps of the methods described in the various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various program code storage media.

[0624] On the other hand, the embodiments of the present application also provide a processor-readable storage medium, which stores a computer program. The computer program is used to make the processor execute the method provided by the above embodiments, for example, including:

[0625] In a case where a secondary cell group (SCG) is in a deactivated state, receiving target information transmitted by a master cell group (MCG) of a terminal; the target information is used to indicate buffer data state information of the SCG.

[0626] The target information includes at least one of the following:

[0627] Target buffer status report (BSR);

[0628] Target radio resource control (RRC) signaling.

[0629] Determining that a secondary cell group (SCG) is in a deactivated state;

[0630] Transmitting target information to a network device through a master cell group (MCG); the target information is used to indicate buffer data state information of the SCG;

[0631] The target information includes at least one of the following:

[0632] Target buffer status report (BSR);

[0633] Target radio resource control (RRC) signaling.

[0634] The processor-readable storage medium can be any available medium or data storage that the processor can access, including but not limited to a magnetic storage (such as a floppy disk, a hard disk, a magnetic tape, a magneto-optical disk (MO), etc.), an optical storage (such as a CD, a DVD, a BD, a HVD, etc.), and a semiconductor storage (such as a ROM, an EPROM, an EEPROM, a non-volatile memory (NAND FLASH), a solid-state disk (SSD), etc.), etc.

[0635] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) containing computer-usable program code.

[0636] The computer executable instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operations steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 one or more flow or blocks. Figure 1 one or more flow or blocks.

[0637] These processor executable instructions can also be stored in a processor readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the processor readable memory produce an article of manufacture including instructions which implement the function specified in the flowchart block or blocks. Figure 1 one or more flow or blocks. Figure 1 one or more flow or blocks.

[0638] These processor executable instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operations steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 one or more flow or blocks. Figure 1 one or more flow or blocks.

[0639] Obviously, numerous modifications and variations of the present application are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims and their equivalents, the application can be practiced otherwise than as specifically described.

Claims

1. A method for transmitting buffer data state information of a secondary cell group, the method comprising: The method comprises: determining that a secondary cell group (SCG) is in a deactivated state; sending target information to a network device through a master cell group (MCG); the target information is used to indicate buffer data state information of the SCG; wherein the target information comprises at least one of the following: a target buffer status report (BSR); target radio resource control (RRC) signaling; in the case where the target information comprises the target BSR, a reserved bit of a MAC subheader corresponding to the target BSR comprises any one of the following: in the case where the MAC subheader comprises one reserved bit, the reserved bit indicates whether the target BSR is a BSR of the SCG; in the case where the MAC subheader comprises two reserved bits, any one of the two reserved bits indicates whether the target BSR is a BSR of the SCG; in the case where the MAC subheader comprises two reserved bits, one of the two reserved bits indicates whether the target BSR is a BSR of the SCG, and the other indicates whether the target BSR is a BSR of the MCG; in the case where the MAC subheader comprises two reserved bits, the two reserved bits indicate an SCG index; the SCG index is used to indicate which SCG the target BSR is a BSR of; wherein the format of the target BSR is any one of a short format, a long format, a short truncated format, a long truncated format, and a predetermined format; in the case where the target information comprises the target RRC signaling, the target RRC signaling comprises indication information that the SCG has data to be transmitted. 2.The method of transmitting buffer status information of a secondary cell group according to claim 1, wherein, in the case where the target information comprises the target BSR, a logical channel ID (LCID) corresponding to the target BSR comprises: a target LCID value corresponding to a predetermined Codepoint and / or Index parameter value, the target LCID value corresponding to a format of a BSR of the SCG; the format of the BSR of the SCG comprises one or more of a short format, a long format, a short truncated format, and a long truncated format. 3.The method of transmitting buffer status information of a secondary cell group according to claim 1, wherein, in the case where the target information comprises the target BSR, an LCID corresponding to the target BSR comprises: a target LCID value corresponding to a predetermined Codepoint and / or Index parameter value, the target LCID value corresponding to a BSR of a predetermined format of the SCG; wherein a BSR medium access control (MAC) control element (CE) corresponding to the BSR of the predetermined format of the SCG comprises at least one of the following: an SCG index; a logical channel group (LCG) bitmap; an LCG ID; an LCID; an LCID bitmap; an LCID index bitmap; an LCID index; LCID bitmap length indication information; LCID index length indication information; buffer data information; indication information of whether there is an unreported BSR. 4.The method of transmitting buffer status information of a secondary cell group according to claim 1, wherein, In the case that one of the two reserved bits indicates whether the target BSR is a BSR of the SCG or not, and the other indicates whether the target BSR is a BSR of the MCG or not, the MAC subheader corresponding to the target BSR includes any one of the following: one target LCID, used to indicate the format of the BSR of the SCG and / or the format of the BSR of the MCG; two target LCIDs, respectively used to indicate the format of the BSR of the SCG and the format of the BSR of the MCG. 5.The method for transmitting buffer status information of a secondary cell group according to claim 1, wherein, In the case that the target information includes the target RRC signaling, the target RRC signaling includes data radio bearer (DRB) identification information of the SCG having data to be transmitted, and the DRB identification information is indicated by a bitmap. The bitmap includes any one of the following: all MCG IDs and all SCG IDs; DRB IDs having radio link control (RLC) bearers in the SCG; DRB IDs having RLC bearers in the SCG, and the RLC bearers not belonging to split bearers; DRB IDs having RLC bearers in the SCG, and in the case that the RLC bearers are split bearers, the RLC bearers only include split bearers with a primary path in the SCG. 6.The method for transmitting buffer status information of a secondary cell group according to claim 1, wherein, In the case that the target information includes the target RRC signaling, the target RRC signaling includes DRB IDs of the SCG having data to be transmitted, and the DRB IDs are any one of the following: DRB IDs having RLC bearers in the SCG; DRB IDs having RLC bearers in the SCG, and the RLC bearers not belonging to split bearers; DRB IDs having RLC bearers in the SCG, and in the case that the RLC bearers are split bearers, the RLC bearers only include split bearers with a primary path in the SCG. 7.The method of claim 1, wherein, In the case that the target information includes the target RRC signaling, the target RRC signaling includes logical channel identification information of the SCG having data to be transmitted, and the logical channel identification information is indicated by a bitmap or by a list of LCIDs. The logical channel identification information satisfies any one of the following: the logical channel identification information includes bearers, and in the case that the bearers are split bearers, the bearers only include split bearers with a primary path in the SCG; the logical channel identification information includes bearers, and the bearers not belonging to split bearers; the logical channel identification information includes bearers, and the bearers not belonging to split bearers with a primary path in the MCG. 8.The method of transmitting buffer status information of a secondary cell group according to claim 1, wherein, In the case that the target information includes the target RRC signaling, the target RRC signaling includes logical channel group identification information of the SCG having data to be transmitted, and the logical channel group identification information is indicated by a bitmap or by a list of LCG IDs. 9.The method of claim 1, wherein, In the case that the target information includes the target RRC signaling, the target RRC signaling includes size information of data to be transmitted of the SCG. The size of the data to be transmitted of the SCG is in any one of the following units: per DRB, per LC, per LCG, or per SCG.

10. A method for transmitting buffer data state information of a secondary cell group, the method comprising: Comprising: receiving, by a terminal, target information sent by a master cell group (MCG) when a secondary cell group (SCG) is in a deactivated state; the target information is used to indicate buffer data status information of the SCG; wherein the target information comprises at least one of: a target buffer status report (BSR); target radio resource control (RRC) signaling; when the target information comprises the target BSR, a reserved bit of a MAC subheader corresponding to the target BSR comprises any one of: when the MAC subheader comprises one reserved bit, the reserved bit indicates whether the target BSR is a BSR of the SCG; when the MAC subheader comprises two reserved bits, any one of the two reserved bits indicates whether the target BSR is a BSR of the SCG; when the MAC subheader comprises two reserved bits, one of the two reserved bits indicates whether the target BSR is a BSR of the SCG, and the other indicates whether the target BSR is a BSR of the MCG; when the MAC subheader comprises two reserved bits, the two reserved bits indicate an SCG index; the SCG index is used to indicate which SCG the target BSR is for; wherein the format of the target BSR is any one of a short format, a long format, a short truncated format, a long truncated format, and a predetermined format; when the target information comprises the target RRC signaling, the target RRC signaling comprises indication information that the SCG has data to be transmitted. 11.The method of transmitting buffer status information of a secondary cell group according to claim 10, wherein, Further comprising: performing at least one of the following according to the target information: reconfiguring a target bearer for the MCG and / or the SCG; activating the SCG; wherein the target bearer is used to transmit data corresponding to the buffer data status information of the SCG.

12. A terminal comprising a memory, a transceiver, and a processor: a memory for storing a computer program; a transceiver for transceiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations: determining that a secondary cell group (SCG) is in a deactivated state; sending, by a terminal, target information to a network device through a master cell group (MCG); the target information is used to indicate buffer data status information of the SCG; wherein, the target information comprises at least one of: a target buffer status report (BSR); target radio resource control (RRC) signaling; when the target information comprises the target BSR, a reserved bit of a MAC subheader corresponding to the target BSR comprises any one of: when the MAC subheader comprises one reserved bit, the reserved bit indicates whether the target BSR is a BSR of the SCG; when the MAC subheader comprises two reserved bits, any one of the two reserved bits indicates whether the target BSR is a BSR of the SCG; In a case where the MAC subheader includes two reserved bits, one of the two reserved bits indicates whether the target BSR is a BSR of the SCG, and the other indicates whether the target BSR is a BSR of the MCG. In a case where the MAC subheader includes two reserved bits, the two reserved bits indicate an SCG index; the SCG index is used to indicate which SCG the target BSR is a BSR of. The format of the target BSR is any one of a short format, a long format, a short truncated format, a long truncated format, and a predetermined format. In a case where the target information includes the target RRC signaling, the target RRC signaling includes indication information that the SCG has data to be transmitted.

13. A network device, comprising a memory, a transceiver, and a processor: The memory is configured to store a computer program; the transceiver is configured to transceive data under control of the processor; and the processor is configured to read the computer program in the memory and perform the following operations: In a case where a secondary cell group (SCG) is in a deactivated state, receiving target information transmitted by a master cell group (MCG) from a terminal; the target information is used to indicate buffer data state information of the SCG; wherein The target information includes at least one of the following: a target buffer status report (BSR); target radio resource control (RRC) signaling; In a case where the target information includes the target BSR, a reserved bit of a MAC subheader corresponding to the target BSR includes any one of the following: In a case where the MAC subheader includes one reserved bit, the reserved bit indicates whether the target BSR is a BSR of the SCG; In a case where the MAC subheader includes two reserved bits, any one of the two reserved bits indicates whether the target BSR is a BSR of the SCG; In a case where the MAC subheader includes two reserved bits, one of the two reserved bits indicates whether the target BSR is a BSR of the SCG, and the other indicates whether the target BSR is a BSR of the MCG; In a case where the MAC subheader includes two reserved bits, the two reserved bits indicate an SCG index; the SCG index is used to indicate which SCG the target BSR is a BSR of. The format of the target BSR is any one of a short format, a long format, a short truncated format, a long truncated format, and a predetermined format. In a case where the target information includes the target RRC signaling, the target RRC signaling includes indication information that the SCG has data to be transmitted.

14. An apparatus for transmitting buffer data state information of a secondary cell group, the apparatus comprising: comprise: a determining module configured to determine that a secondary cell group (SCG) is in a deactivated state; a sending module configured to send target information to a network device through a master cell group (MCG); the target information is used to indicate buffer data state information of the SCG; The target information includes at least one of the following: a target buffer status report (BSR); target radio resource control (RRC) signaling; In a case that the target information comprises the target BSR, reserved bits of a MAC subheader corresponding to the target BSR comprise any one of the following: In a case that the MAC subheader comprises one reserved bit, the reserved bit indicates whether the target BSR is a BSR of the SCG; In a case that the MAC subheader comprises two reserved bits, any one of the two reserved bits indicates whether the target BSR is a BSR of the SCG; In a case that the MAC subheader comprises two reserved bits, one of the two reserved bits indicates whether the target BSR is a BSR of the SCG, and the other indicates whether the target BSR is a BSR of the MCG; In a case that the MAC subheader comprises two reserved bits, the two reserved bits indicate an SCGindex; the SCGindex is used to indicate which SCG the target BSR is a BSR of; wherein the format of the target BSR is any one of a short format, a long format, a short truncated format, a long truncated format, and a predetermined format; In a case that the target information comprises the target RRC signaling, the target RRC signaling comprises indication information that the SCG has data to be transmitted.

15. An apparatus for transmitting buffer data state information of a secondary cell group, the apparatus comprising: comprise: a receiving module, configured to receive, in a case that a secondary cell group (SCG) is in a deactivated state, target information sent by a master cell group (MCG) through a terminal; the target information is used to indicate buffer data state information of the SCG; wherein the target information comprises at least one of the following: a target buffer status report (BSR); target radio resource control (RRC) signaling; In a case that the target information comprises the target BSR, reserved bits of a MAC subheader corresponding to the target BSR comprise any one of the following: In a case that the MAC subheader comprises one reserved bit, the reserved bit indicates whether the target BSR is a BSR of the SCG; In a case that the MAC subheader comprises two reserved bits, any one of the two reserved bits indicates whether the target BSR is a BSR of the SCG; In a case that the MAC subheader comprises two reserved bits, one of the two reserved bits indicates whether the target BSR is a BSR of the SCG, and the other indicates whether the target BSR is a BSR of the MCG; In a case that the MAC subheader comprises two reserved bits, the two reserved bits indicate an SCGindex; the SCGindex is used to indicate which SCG the target BSR is a BSR of; wherein the format of the target BSR is any one of a short format, a long format, a short truncated format, a long truncated format, and a predetermined format; In a case that the target information comprises the target RRC signaling, the target RRC signaling comprises indication information that the SCG has data to be transmitted.

16. A processor-readable storage medium, characterized in that, The processor readable storage medium stores a computer program, and the computer program is used to make the processor execute steps of the method in any one of claims 1 to 9, or execute steps of the method in claim 10 or 11.

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