TW200922345A - A method and a device for improved TD-HSDPA radio resource handling - Google Patents

Abstract

A method for a TD-HSDPA system (100) with a NodeB (120) which controls traffic to and from user terminals, UEs (140), and with an RNC (110), for controlling radio resources in the system. Some radio Resource Units of a cell (130) are assigned by a NodeB (120), and the NodeB sets up (710) a connection between a UE and the system by establishing an RRC to the RNC. A first channel on a first frequency is established between the NodeB and the UE. An RAB, is established between the NodeB and the UE, and the NodeB recommends (725) the RNC a second frequency for the RAB. The NodeB performs a check (730) of the first frequency of the first channel and the second frequency recommended for the RAB, and if the two frequencies do not coincide, this information is sent (735) to the RNC.

Description

200922345 IX. Description of the Invention: [Technical Field] The present invention discloses an apparatus and method for improving radio resource disposal in a wireless cellular access system of one of the types of time division high speed downlink packet access (TD-HSDPA). - [Prior Art] In modern wireless cellular access systems, high-speed downlink packet access technology, often abbreviated as HSDPA, is used. When HSDPA is applied to the system (the system uses a time-sharing synchronous code division multiple access system, the abbreviation TD-HSDPA is used in the discussion. Time-division synchronous code division multiple access (TD-SCDMA) system One of the standards in the third generation mobile communication system (3G). Similar to systems using WCDMA (Wide Code Multiple Access), HSDPA, the TD-HSDPA technology uses connection adaptation techniques such as AMC (Adaptive Modulation and Coding) And HARQ (Hybrid Automatic Repeat Request) to improve the capability of the TD-SCDMA RAN (Radio Access Network) access packet service. TD In 3GPP (3G Partner Program) R5, TD-HSDPA is standardized. -SCDMA technology, there is a specific multi-frequency technology, called N-carrier technology, the purpose of this technology is to improve the system's ability and optimize the power usage between the common time slot and the traffic time slot in the TD-SCDMA system. 'Cover balance. In an N-carrier TD-HSDPA system, the 'RU assignment to a UE is managed by the Node B of the cellular cell'. At this time, the UE also belongs to it. As a RU assignment in a cellular cell One instance 'said to be configured to 132 570.doc 200922345 HSDPA Radio Access Bearer (RAb) of a frequency or frequencies, the RAB is a radio link between the B and the B of the B-cell in the Hive. If we punch For example, a UE entering a cellular cell needs to establish and maintain a so-called RRC (Radio Resource Control) connection between the Node B and its RNC before a RAB is established. Due to this need, a certain channel a so-called auxiliary dedicated channel (A-DCH), which is used for

The HSDPA RAB transmission signal on a certain frequency precedes the HSDpA RAB (which is established, which will be explained later, which results in a limitation on the flexibility of RU assignment of Node B in the N-carrier TD-HSDPA system. Back to the question, the problem may be caused by the current establishment process in the N-carrier TD HSDPA system, taking a cellular cell in a system as an example, where the establishment and connection of the radio link (RL) and RRC The A-DCH is established during the process, and this process occurs prior to the establishment of the RAB.

During the RAB establishment process, the Node B of the cellular cell will give its RNC a recommendation for the (expected) HS-DSCH (High Speed Dedicated Shared Channel) radio k resource unit (RU). For HSDPA RAB. This recommendation will be based, for example, on the RU loading situation or ru priority establishment and the like. In an information element (IE) in which the radio link is reconfigured, the recommendation will be fed back from the Node B to the RNC. If the node b expects the frequency for the hs_DSCH RAB to coincide with the frequency for the A-DCH, the hs·DSCH RAB will be successfully established. However, if the frequency that node b wants to use for the HS-DSCH RAB does not match the frequency of the A-DCH, then a Ru configuration flush will occur. The node ugly will check the ability to determine the discussion. (4) Whether the UE can work in all frequencies at the same time, and if this is true, the HS-DSCH will be established as pushed by Node B. However, if this is not true, then the A_DCH frequency will be used as the bearer for the 1^_DSCH, which means that Node B needs to use the A_DCH frequency instead of its recommendation in the reconfiguration of the money link. This will link the A_ dirty with the HS-DSCH to a frequency, which will result in a limitation on the node's (four) milk and bottom flexibility, ie a node in an N-carrier TD-HSDPA system. B. In this case, when the frequency is used, the UE that can only operate on one frequency will limit the flexibility of the current system. SUMMARY OF THE INVENTION Therefore, as described above, there is a need for a solution by which a node b in a wireless cellular access system can implement Radio Resource Control (RRC) in a manner superior to the previous γ mode. And Radio Access Bearer (RAB) 'is especially in an N-carrier TD_HSDpA system. Compared to previous solutions, this solution should provide Node B with greater flexibility, especially for UEs operating on only one frequency at a time. The present invention provides such a solution in that it is disclosed in the present invention that a party used in one of the time-division high-speed downlink packet access (TD-HSDPA) types of wireless cellular access systems is There is at least one first Node B for controlling traffic to and from a User Terminal (UE) within a cellular cell in the system. The system to which the present invention is applicable will include a radio network controller 132570.doc 200922345 (RNC) 'which is used to control at least part of the radio resources of the system, in the system 'before' by - the cellular cell The Node B assigns to some of the Radio Resource Units (RUs) of the cellular cell. According to the method of the present invention, a node B establishes a connection between the door of the system and the door of the system by establishing a wire power resource control (10) key path to the read 'in the connection to the RNC' The node b establishes a first channel on the first frequency with the UE, and then establishes a Radio Access Bearer (RAB) between the Node B and the UE. In addition, according to the method of the present invention, the Node B recommends a second frequency to the RNC for the RAB, and the node b will perform the first frequency for the first channel and is recommended for the One of the second frequencies of the RAB is checked, and if the two frequencies are inconsistent, the information is transmitted to the RNC. By way of the present invention, the RNC is informed whether the frequency used for the first channel is inconsistent with the frequency used for the RAB, and in a preferred example, the RNC uses information about the inconsistent frequency. "Migrate" the frequency of the first channel to the recommended frequency for the RAB and also release the RU associated with the first frequency. In a preferred embodiment of the invention, the first channel is a dedicated dedicated channel (A-DCH) and the RAB is adapted to be built in a high speed dedicated shared channel (HS-DSCH channel). Also, in a particular embodiment of the invention, information about inconsistent frequencies is transmitted to the RNC as an add-on block in an existing information element (IE). Suitably, the prior art is an IE in the reconfiguration of the radio link 132570.doc -10- 200922345. However, it is also possible to transmit this information to the action - a separate information element (IE). [Embodiment] FIG. 1 shows an overview of a system 100 in which the present invention may be applied. As described earlier, the primary object of the present invention is for a wireless cellular access system of the TD_HSDPA type, which is a HSDPA (High Speed Downlink Packet Access) type of TD_SCDMA (Time Division Synchronous Code Multiple Access).

As shown in Figure 1, in such a system, referred to as 100 in Figure 1, there will be a geographical area, a cellular cell, as shown in Figure ,, where there may be many user terminals (UE). One of them is shown in Figure 14. These changes in the UE system in the cellular cell, and the number shown in the figure, are merely for facilitating an understanding of an embodiment of the present invention. Also shown in Figure 1, the system 100 will also include at least one so-called Node B, such as 12 显示, which is within a cellular cell, such as the cellular cell 13_ in the system, for controlling round-trip The terminal of the user terminal. Moreover, the present invention may be included in the system (10) to include at least a portion of the radio network controller (10) that is used to control at least the system radio resources (10). Examples of RUs in a system such as the system of Figure 1 are frequency, time slot, channel code, and the like. The purpose of Figure 2 is to illustrate some of the concepts that will be used in this document: in Figure 2, the "link" between the elements of Figure 1 is shown as B-R.NC. Next to this link is the 'RRC, RRC (Radio Resource Control) 190 and RAB (Radio Access Control), and the heart of the system. In the RNC and the UE, however, the rAB is a data channel that will extend from the UE to the CN (core network) 117 via the RNC. Figure 3 shows a chart of a possible event in a system according to the prior art. The numbers on the left arrow in the diagram represent the message, and the numbers on the right grid in the diagram represent a brief explanation of the events. These numbers correspond to the following explanatory text: 'Message I: RRC Connection Setup Requirement 2: Radio Link Setup 3. Radio Link Setup Response 4: RRC Connection Setup Complete 5: RRC Connection Setup Complete 6: Radio Link Reconfiguration Preparation 7: Radio Link Reconfiguration Ready 8: Radio Link Reconfiguration Delegate Event

II: Preparing to establish A-DCH 12 in frequency F1: A-DCH in F1

13: Node B wants to establish HS-DSCH in F1 14: Node B wants to establish HS-DSCH in F1 and F2

15 : Node B wants to establish HS-DSCH in FI, F2, F3

16: HS-DSCH in F1

17: HS-DSCH in (FI, F2)

18: HS-DSCH in (FI, F2, F3) 132570.doc 200922345 As can be seen from Figure 3, the sequence results shown in Figure 3 are A_DcH 〃, HS DSCH sharing the same frequency, in this case frequency η, hS_ DSCH is also used on other frequencies, ie? 2 and hit. In such a case, that is, when the two channels A-DCH share a frequency with the HS-DSCH, the problem to be solved by the present invention does not occur. And returning to the sequence of events shown in Figure 4, showing another possible result of a situation when trying to establish a connection. All of the messages and events in Figure 4 corresponding to the messages and events in Figure 3 have been given the same number. Thus, the only event added in Figure 4 is the event with reference numeral 13, which represents the node B wants to establish a situation at the frequency. As can be seen in Figure 4, because η is used for A_DCH, Therefore, the sequence result in Figure 4 is eight_0(:^ and 1^_1^(:11 is established in ^. Therefore, A-DCH and HS-DSCH are established in two different frequencies, which will Limiting the RU (Radio Resource Unit) assignment flexibility of the Node B. One of the purposes of the present invention is to ensure that the frequencies used for incoming _〇(:^ and 1^_1^(:11 will be identical. Therefore, when the Node B When the frequency for the HS_DSCH, that is, the channel for the RAB, is recommended to the RNC, the Node B will check the frequency used for the A_DCH before recommending to the RNC. If the node b informs the two frequencies' If the frequency of the A-DCH is not the same as the frequency recommended to the HS_DSCH, then the defect B will inform the rnc of this. Correspondingly, 'in order to see that one and the same frequency is used for Μ(3) and HS-DSCH, the RNC The information about the inconsistent frequency obtained from section (4) will be used to determine the frequency of the first channel, ie the job. Or migrate to the recommended frequency of the RAB' and also release the radio resource list 132570.doc •13· 200922345 yuan (RU), which is related to the frequency originally used for A_DCH. About for A-DCH and HS-DSCH The information of the inconsistent frequency is preferably transmitted from the Node B to the RNC as an added element in an existing information element (IE), but the information can also be naturally transmitted to the RNc as a separate information element. (IE). If an existing IE is used, then the radio key reconfiguration is preferably the used π. Figure 5 shows a possible sequence event in a system in which the present invention is used. All the messages and events shown in the figure have retained their reference numbers in those schemas. As can be seen, in "23", the Node B recommends that the RNC establish HS-DSCH in frequency F2, This is a recommendation for transmission in the reconfiguration of the message radio link. However, prior to transmitting this message, the Node B has made a frequency recommended for the HS_DSCH and is used for the A-DCH according to the present invention. frequency In this particular case, it is also apparent in Figure 5 that the comparison shows that the two frequencies are different 'that is, they are inconsistent. Therefore, the Node B informs the RNC of this, And in order to see that the two frequencies are established at one and the same frequency, the RNC may use this information. This is shown in "24" of Figure 5, where Node B is ready to establish the HS at F2. DSCH, and is also preparing to transfer A-DCH to F2. This is accomplished by the Node B as a result of an instruction to the RNC effect, which may, for example, be received in the message radio link resource reconfiguration delegate, in "18" of Figure 3-5. Thus, in Fig. 5, 25", A_DCH and DSCH are established on F2. Also, the node 8 has released all RUs attached to the previous A-DCH frequency, i.e., F1. 132570.doc • 14- 200922345 Figure 6 shows a subtle change in the event graph of Figure 6 β a-DCH is established at F1, and the Node B wishes to establish HS DSCH at F2 and F3, as shown in Figure 6 "33" display. As in the previous example, the A-DCH is built at F1. Therefore, at "33", the Node B informs the RNC of the RNC and the RNC, in "34, recommends that the Node B transfers the A-DCH to the frequency F3, and re-configures the message in the message radio link" In 18", the RNC informs the Node B at "34", and at "35", the A-DCH is created in F3 and is created.

Figure 7 shows a rough flow chart of one of the methods 7 of the present invention. Alternative or alternative steps have been shown in dashed lines in Figure 7. Thus, as shown in FIG. 7, according to the method 700, a Node B is established, as shown in step 7A, by establishing an RRC (Radio Resource Control) connection to the RNC, between a UE and the system. One connection. In connection with this, as shown in step 715, a first channel on a first frequency is established between the Node B and the UE. Then, in step 720, a radio access bearer (rab) is Established between the node b and the UE. In addition, in step 725, the Node B recommends the RNC - for RAB: second frequency ' and as shown in step 73, the Node B checks the first frequency and recommendation for the channel # The second frequency of the rab, and if the two frequency seats are: PC — za , RNc. Then, in step 735, the information is transmitted to the node B for use as shown in step 740. In an embodiment of the invention, the RNc determines the information about the non-frequency to be used. 132570.doc •15· 200922345 The frequency of the first channel migrates to the recommended frequency of the RAB and releases the RU associated with the first frequency. Step 745 shows that the first channel is preferably a secondary dedicated channel (A_DCH). As shown in step 750, in an embodiment of the invention, the RAB may be built into a high speed dedicated shared channel (hs_dsch channel). Step 755 displays information about the inconsistent frequency being transmitted to the rnc as in an existing An add element in the information element (IE) that is likely to be reconfigured for the IE radio link. However, in another embodiment, the information can be transmitted as a separate information element ("E). Figure 8 shows a rough block diagram of a base station, or a transceiver 8 of the present invention, for use as an eNodeB as described above. As can be seen in Figure 8, the eNodeB of the present invention 800 includes an antenna 810 for communicating with UEs in one or more of the cellular cells, and also includes a transmitter 830 and a receiver 820 for the communication. Further, the eNodeB 8〇〇 Also included is a control member such as microprocessor 840, which also includes a memory 85. Additionally, the transceiver 800 may include an interface "Int" 860' that faces another node, such as the RNC. 〇 basically includes a component for performing the function according to the above method, and a node b for use in a wireless cellular access system of the type of time-dependent high speed downlink packet access (td_HSDPA), which is used for transmitting and receiving The utility has the following components: • Controls the communication to and from the user terminal (UE) in a cellular cell (13〇) of the system. These components may include the controller 132570.doc • 16- 200922345 840 The memory 8S0, the transmitter 83, and the An antenna ^^ is connected to a radio network controller (RNC) (which controls at least part of the radio resources of the system. These components are suitable for the interface 860, which may be by, for example, the controller 84〇 is assisted. • Assign at least some of the radio resource units (RUs) of a cellular cell in the system 70. These components may include the controller 840, the memory 850, the transmitter 830, and the antenna 81〇 .

• Establish a connection between the UE and the system by establishing an RRC (Radio Resource Control) connection to the RNC. These components may include the controller 840, the memory 85, the transmitter 830, and the antenna 81 0. • Establishing a first channel on the first frequency between the Node B and the UE. These components may include the antenna 81G, the receiver, the transmitter 830, the controller 84, and the memory 85A. • Establish a Radio Access Bearer (RAB) between the Node B and the UE. Some methods may include the antenna 810, the receiver _, the transmitter 83, the controller, and the memory (4). • The job-second frequency is recommended for this theory, which can be done via the interface ('’Int") 860. Furthermore, the node B of the present invention includes a component, such as the controller 850, for the escrow field && t for performing the first frequency 用于 for the first channel The second frequency of the pair - checking, and if the two frequencies are not "as the interface pair and the controller 84G are used to transmit this information to the 132570.doc 200922345 brain embodiment, all or part of the invention may be Electrically or internally, 2SW) (d) to achieve 'this may be stored in the storage medium to achieve, then the month of the month, or the part of the invention as sw: see the SW may also be stored in a system to which the invention is applied Such as: - one or more nodes or nodes. For example, it might make

:C and the node of the section (4) are stored with the appropriate part of the sw and the point is executed when the system operates. The present invention is not limited to the examples and drawings of the above embodiments, but may be freely changed within the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS The invention will be described in detail with reference to the accompanying drawings in which: FIG. 1 shows an overview of a system to which the invention applies; FIG. 2 shows some concepts used herein; FIGS. 3 and 4 show prior art events Figures 5 and 6 show an event chart of the present invention; Figure 7 shows a schematic flow chart of one of the methods of the present invention; and Figure 8 shows a block diagram of one of the transceivers of the present invention. [Main component symbol description]

100 System 110 Radio Network Controller 115 Radio Network Controller 117 Core Network 120 Node B 132570.doc 200922345 130 Honeycomb Cell 140 User Terminal 160 Radio Access Bearer 190 Radio Resource Control 700 Method 710 Establish a Connection 715 Establish A first channel 720 establishes an RAB 725 Node B recommends RNC - 730th check 735 Transfer information 740 Method 745 Method 750 Method 755 Method 800 Transceiver 810 Antenna 820 Receiver 830 Transmitter 840 Microprocessor 850 Memory 860 Interface 132570. Doc -19-

Rate for RAB

Claims (1)

200922345 X. Patent Application Range: 1. A method for use in a wireless cellular access system (1〇〇) such as a One-Time Time High Speed Downlink Packet Access System (TD-HSDPA) system (700) In the system, there may be at least one first-node B (1 20) for controlling a user terminal (UE) to and from a cellular cell '(13〇) in the system (140) The system also includes a Radio Network Controller (RNC) (11A) for controlling at least a portion of the radio resources of the system, in the system, by a small cell (13) The node (120) of the 指派) assigns at least some radio resource units (RUs) of the cellular cell (130), according to the method (700), a node 建 establishes a radio resource control (RRC) to the RNC Linking, establishing (710); a connection between a UE and the system, in the connection to the rnc, between the node Β and the UE (715) one in - a first channel on a frequency, and then a (720)-radio between the node and the UE Carrying a bearer (RAB), and according to the method, the Node B recommends (725) a second frequency to the rNC for the rAb, the party d method characterized in that the node] 6 performs a pair for the first The first frequency of the channel and one of the second frequencies recommended for the RAB are checked (73〇), and if the two frequencies do not match, the information is transmitted (735) to the RNC. 2. The method of claim 1 (700, 74A), wherein the RNC decides to migrate the frequency for the first channel to the recommended frequency for the RAB using information about the frequency that is not, and releases the The RU associated with the first frequency. 132570.doc 200922345 3. According to the method of claim (7〇〇, 745), wherein the first channel is an auxiliary dedicated channel (A-DCH). 4. The method (7〇〇, 75〇) according to any one of claims i to 3, wherein the RAB system is built in a high speed dedicated shared channel (hs_dscH channel). 5_ The method according to any one of the preceding claims (7, 755), wherein the information is transmitted to the RNC as an additional shelf in an existing information element (IE). 6. The method of claim 4 (7, 755), wherein the existing smart radio link is reconfigured. 7. According to the request item! The method of any of (4), wherein the information is transmitted to the RNC as a separate information element (IE). 8. A transceiver (800) for use as a Node B (12〇) in a wireless cellular access system (1〇〇) such as a Time Division High Speed Downlink Packet Access (TD-HSDPA) system 'The transceiver (8〇〇) has the following components: Control (840, 850, 830, 810) to and from the user terminal (ue) (14〇) in a cellular cell (130) of the system Communication with a Radio Network Controller (RNC) (u) that controls at least part of the radio resources of the system; , 850, 830, 810) at least some of the radio resource units (RUs) of the cellular cell (13 给) are provided to the RNC; established by establishing a Radio Resource Control (RRC) link to the RNC (840, 850, 860, 81 〇) between a UE and the system); 132570.doc 200922345 Between the Node B and the UE (810, 820, 830, 840, 850) - a first channel on a first frequency; between the Node B and the UE (810, 820, 830, 840, 850) - wireless Access bearer (RAB); recommendation (860) - a second frequency for the rnc for the RAB, the transceiver being characterized in that it includes means for performing the first frequency and for the first channel Means for recommending the second frequency of the RAB (840, 850); and means (840, 860) for transmitting the information to the RNC if the two frequencies are inconsistent. 9. The transceiver (800) of claim 8, wherein the first channel is the auxiliary dedicated channel (A-DCH). 10. The transceiver (800) of claim 8 or 9, wherein the rab is built in the high speed dedicated channel (HS-DSCH channel). 11. The transceiver (800) of any one of claims 8 to 10, comprising means for transmitting the information to the rNC as an added element in an existing information element (IE). 12. The transceiver of claim 11, wherein the existing positive radio link is reconfigured. 13. A transceiver according to any one of claims 8 to 11 which can transmit the information to the RNC as a separate information element (IE). 132570.doc